US Pat. No. 9,545,038

INVERTER HOUSING

MANDO CORPORATION, Pyeon...

1. An inverter housing comprising: a body having a plate shape; a plurality of capacitor insertion portions formed to be recessed
in a first direction of the body, so that capacitors are inserted there into, and also integrally arranged to be spaced from
each other; a plurality of switching device installation portions configured as spaces in which switching devices are installed,
and arranged between the capacitor insertion portions in a second direction of the body opposite to the first direction; and
a plurality of heat dissipation fins installed in the first direction of the body to face the switching devices with the body
interposed there betweenl wherein the heat dissipation fins are radially arranged on the body; wherein the body has a circular
plate shape, and wherein the capacitors and the heat dissipation fins are alternately arranged in a circular shape along an
inner edge of the circular plate-shaped body.

US Pat. No. 9,283,939

PEDAL SIMULATOR FOR ACTIVE BRAKE SYSTEM

MANDO CORPORATION, Pyeon...

1. A pedal simulator installed at a master cylinder to receive oil pressure according to a driver's foot force to provide
pedal feel to the driver, the pedal simulator comprising:
a simulator block provided with an oil hole connected to the master cylinder, and provided therein with a bore to communicate
with the oil hole;

a first reaction unit comprising a first reaction piston slidably installed in the bore, a first damping member installed
at the first reaction piston to move together with the first reaction piston, and a first reaction spring compressed by the
first reaction piston; and

a second reaction unit comprising a second reaction piston provided in the bore to be spaced a certain distance apart from
the first reaction piston and to support the first reaction spring and slide in the bore, a damping housing connected to the
simulator block to be spaced a certain distance apart from the second reaction piston, a second reaction spring installed
between the second reaction piston and the damping housing to be compressed by the second reaction piston, and a second damping
member installed in the damping housing to contact the second reaction piston,

wherein the second damping member is configured with an upper damper and a lower damper,
wherein hardness of the lower damper is greater than or equal to hardness of the upper damper.

US Pat. No. 10,029,568

SYSTEM FOR WARNING OF DROWSINESS OF DRIVER AND METHOD THEREOF

MANDO CORPORATION, Pyeon...

1. A driver's drowsiness warning system, comprising:a vehicle speed sensor configured to measure a vehicle speed;
a steering angle sensor configured to measure a steering signal;
a lane recognizing sensor configured to recognize a lane;
a lane keeping assist unit configured to determine whether a vehicle is out of a lane that the vehicle drives along; and
a controller configured to,
when the vehicle drives in a straight line and the vehicle speed is faster than a predetermined speed, determine whether a driver is drowsy based on at least one out of a frequency of a change in the steering signal during a predetermined period of time and whether the vehicle is out of the lane that the vehicle drives along, and
generate a warning to the driver when it is determined that the driver is drowsy,
wherein the controller is configured to
when the frequency of the change in the steering signal during the predetermined period of time is less than predetermined reference frequency, determine the driver is drowsy, and
when the lane keeping assist unit determines that the vehicle is out of the lane, determine the driver is drowsy.

US Pat. No. 9,156,457

ELECTRO-HYDRAULIC BRAKE SYSTEM

MANDO CORPORATION, Pyeon...

1. An electro-hydraulic brake system comprising:
a master cylinder to generate hydraulic pressure according to pedal force to a brake pedal;
a reservoir provided at an upper portion of the master cylinder to store oil;
an intermediate pressure accumulator to store hydraulic pressure;
a first motor and a first pump to suction oil through a channel connected to the reservoir and discharge the suctioned oil
to the accumulator to create hydraulic pressure in the intermediate pressure accumulator in braking;

a second motor and a second pump coupled to an output side of the intermediate pressure accumulator to increase responsiveness
in braking;

two hydraulic circuits, each of the hydraulic circuits being connected to two wheels;
a flow control valve and a pressure reducing valve provided between the intermediate pressure accumulator and the two hydraulic
circuits to control pressure transmitted from the intermediate pressure accumulator to a wheel cylinder installed at each
of the wheels; and

a check valve provided at the output side of the intermediate pressure accumulator,
wherein the intermediate pressure accumulator is disposed between the first pump and the check valve.

US Pat. No. 9,129,162

VEHICULAR PARKING CONTROL SYSTEM AND VEHICULAR PARKING CONTROL METHOD USING THE SAME

MANDO CORPORATION, Pyeon...

1. A vehicular parking control system, comprising: a camera configured to acquire an image of a parking space with reference
to a position of a personal car; a sensing unit configured to sense an object in the parking space; and an electronic control
unit configured to search for an available parking space by comparing an image pattern of an object within the image of the
parking space acquired from the camera with a preset reference image pattern, identifying a type of the object, and removing
a contour of the object, the type of which has been identified as a temporary obstacle, from contours of objects in the parking
space corresponding to a sensing signal sensed by the sensing unit and searching for an area, in which no contour exist, as
the available parking space.

US Pat. No. 9,096,256

ELECTRIC POWER STEERING SYSTEM AND STEERING ANGLE OUTPUTTING METHOD THEREOF

MANDO CORPORATION, Pyeon...

1. An electric power steering system comprising:
a torque sensor including: a first rotor connected to an input shaft, a second rotor connected to an output shaft, a first
angle device configured to measure an absolute steering angle of the first rotor, and second and third angle devices configured
to measure a relative steering angle of the second rotor; and

an electronic control unit including: a reference steering angle determination unit configured to determine a reference steering
angle based on the absolute steering angle and the relative steering angle, a first tracing unit configured to generate a
PWM signal based on the absolute steering angle and the reference steering angle, second and third tracing units configured
to trace and accumulate first and second absolute steering angles based on the relative steering angle and the reference steering
angle, a verification unit configured to determine whether or not a difference between the PWM signal and the first and second
absolute steering angles is smaller than a reference value, and a steering angle providing unit configured, when the difference
between the PWM signal and the first and second absolute steering angles is smaller than the reference value, to calculate
a final absolute steering angle by averaging the first absolute steering angle and the second absolute steering angle and
provide the calculated final absolute steering angle.

US Pat. No. 9,533,675

METHOD FOR CONTROLLING BATTERY OF MILD HYBRID VEHICLE

MANDO CORPORATION, Pyeon...

1. A method for controlling a battery of a mild hybrid vehicle comprising sensors and an electronic control unit (ECU), the
method comprising:
detecting, by the sensors disposed in the vehicle, traffic conditions based on a driving state of the vehicle; and
adjusting, by the ECU of the vehicle, a target State of Charge (SOC) of an energy storage device, by increasing the target
SOC or decreasing the target SOC, based on the detected traffic conditions,

wherein the detecting comprises:
setting, by the ECU, a first range of interest based on the number of times that the vehicle stops; and
detecting, by the sensors, the number of times that a Stop and Go function does not operate due to a low SOC of the energy
storage device within the first range of interest.

US Pat. No. 9,321,443

RESERVOIR TANK OF BRAKE MASTER CYLINDER

MANDO CORPORATION, Pyeon...

1. A reservoir tank of a brake master cylinder comprising:
a reservoir body to store oil therein, the reservoir body being provided with an oil introduction port;
a filter interrupted by a fixing step arranged at a lower portion of the oil introduction port; and
a reservoir cap arranged at an upper portion of the oil introduction port,
wherein a vent member is provided between the fixing step and the filter, to allow inflow of air there through during introduction
of oil.

US Pat. No. 9,296,419

STEERING APPARATUS FOR VEHICLE

MANDO CORPORATION, Pyeon...

1. A steering apparatus comprising: a hinge pipe fitted into and penetrating through a through-hole of a fitting bracket that
is mounted to an upper outer portion of a tube,
wherein the tube surrounds a steering shaft in a direction orthogonal to that of the hinge pipe and is rotatably coupled to
a fixing bracket so that a rotational axis of the tube is perpendicular to that of the hinge pipe,

wherein the hinge pipe has multiple protrusions formed on each end surface thereof around a through-hole that is formed along
the rotational axis of the hinge pipe, and

wherein the each end surface faces inner surfaces of the fixing bracket to prevent slip noise between the inner surfaces of
the fixing bracket and the end surfaces of the hinge pipe.

US Pat. No. 9,266,510

MASTER CYLINDER FOR BRAKE SYSTEM

MANDO CORPORATION, Gyeon...

1. A master cylinder for brake systems including a cylinder body having a bore therein, a first and second piston installed
in the bore to move forward and backward, and a first hydraulic pressure chamber and a second hydraulic pressure chamber adapted
to be pressed respectively by the first and second pistons, the first and second hydraulic pressure chambers being divided
from each other in the bore, the master cylinder comprising:
a pressure regulating channel to connect the first hydraulic pressure chamber to the second hydraulic pressure chamber to
reduce pressure difference between the first hydraulic pressure chamber and the second hydraulic pressure chamber, and a flow
control valve provided in the pressure regulating channel to open and close the pressure regulating channel according to the
pressure difference between the first hydraulic pressure chamber and the second hydraulic pressure chamber,

wherein:
the first hydraulic pressure chamber is provided with a large hydraulic pressure chamber expanded to an inside of the cylinder
body, and a small hydraulic pressure chamber smaller than the large hydraulic pressure chamber; and

the cylinder body is provided with a first oil introduction port to supply oil to the first hydraulic pressure chamber and
a second oil introduction port to supply oil to the second hydraulic pressure chamber,

wherein each of the first and second oil introduction ports is provided with a check valve,
wherein the check valve of the first oil introduction port is closed at an initial stage of braking, and opened after a predetermined
portion of hydraulic pressure in the large hydraulic pressure chamber is discharged, and

wherein the pressure regulating channel allows the large hydraulic pressure chamber of the first hydraulic pressure chamber
and the second hydraulic pressure chamber to communicate with each other therethrough.

US Pat. No. 9,428,214

STEERING COLUMN FOR VEHICLE

MANDO CORPORATION, Pyeon...

1. A steering column of a vehicle comprising:
an adjusting bolt that passes through tilting guide holes having slot shapes and formed on opposite sides of a plate bracket,
and telescoping guide holes having slot shapes and formed on opposite sides of a distance bracket; and

an impact absorbing member having a hollow pipe shape into which the adjusting bolt is inserted therein, and having tilting
impact absorbing parts protruding on an outer peripheral surface thereof supported by opposite lengthwise ends of the tilting
guide hole and telescoping impact absorbing parts protruding on the outer peripheral surface thereof supported by opposite
lengthwise ends of the telescoping guide hole.

US Pat. No. 9,139,183

INTEGRATED ELECTRONIC HYDRAULIC BRAKE SYSTEM

MANDO CORPORATION, Gyeon...

1. An integrated electronic hydraulic brake system for a vehicle comprising:
an integrated hydraulic control device comprising a master cylinder to generate hydraulic pressure based on pedal force of
a brake pedal, a reservoir coupled to an upper portion of the master cylinder to store oil, two hydraulic circuits, each of
the hydraulic circuits being connected to two different pairs of wheels of the vehicle, an accumulator to store a predetermined
level of pressure, flow control valves and pressure reducing valves connected to the two hydraulic circuits to control pressure
transmitted from the accumulator to wheel cylinders installed at the wheels, a balance valve to connect the two hydraulic
circuits and control pressure difference between the two hydraulic circuits, a pedal simulator connected to the master cylinder
to provide reaction force of the brake pedal, and a simulation valve to control connection between the master cylinder and
the pedal simulator; and

a power source unit comprising a pump to suction oil from the reservoir and discharge the suctioned oil to the accumulator
to generate pressure in the accumulator and a motor to drive the pump, wherein

the power source unit is configured as a separate unit to isolate noise generated from the power source unit, and the integrated
hydraulic control device and the power source unit are connected to each other via an external pipe,

wherein the balance valve is provided on a path connecting a first inlet path provided between one of the hydraulic circuits
and one of the flow control valves to a second inlet path provided between the remaining hydraulic circuit and the remaining
flow control valve,

wherein the flow control valves are connected in parallel to the accumulator.

US Pat. No. 9,283,940

MASTER CYLINDER FOR BRAKE SYSTEM

MANDO CORPORATION, Gyeon...

1. A master cylinder for brake systems comprising:
a cylinder body including a first cylinder having a first bore therein and a second cylinder having a second bore therein,
the first and second cylinders being joined together by fastening members to allow the first and second bores to communicate
with each other;

first and second pistons installed to move forward and backward in the first and second bores;
a first hydraulic pressure chamber adapted to be pressed by the first piston arranged in the first bore; and
a second hydraulic pressure chamber adapted to be pressed by the second piston arranged in the second bore,
wherein each of the first and second bores of the cylinder body comprises a large diameter portion expanded to an inside of
the cylinder body to increase a flow rate at an initial stage of braking and a small diameter portion narrowed from the large
diameter portion,

wherein:
the first hydraulic pressure chamber is divided into a first large hydraulic pressure chamber formed at a position of the
large diameter portion of the first bore of the cylinder body and a first small hydraulic pressure chamber formed at a position
of the small diameter portion of the first bore of the cylinder body; and

the second hydraulic pressure chamber is divided into a second large hydraulic pressure chamber formed at a position of the
large diameter portion of the second bore of the cylinder body and a second small hydraulic pressure chamber formed at a position
of the small diameter portion of the second bore of the cylinder body.

US Pat. No. 9,261,588

RADAR APPARATUS AND METHOD MANUFACTURING THE SAME

MANDO CORPORATION, Yeong...

1. A radar apparatus comprising:
a printed circuit board having a top side, on which a radar antenna unit having a plurality of long-distance transmission
array antennas and an RF circuit unit are mounted, and

a bottom side, on which a base band circuit unit and a signal processing circuit unit are mounted;
a base plate coupled to the printed circuit board; and
a protective member coupled to the top side of the printed circuit board to cover the RF circuit unit in order to protect
the RF circuit unit; and

a power divider configured to divide a power to each of the plurality of long-distance transmission array antennas such that
a highest power is applied to a long-distance transmission array antenna arranged at a center of the plurality of long-distance
transmission array antennas and the supplied power decreases as approaching the opposite sides from the long-distance transmission
array antenna arranged at the center,

wherein the top side of the printed circuit board comprises a first portion on which the radar antenna unit is mounted, and
a second portion on which the RF circuit unit is wire bonded and mounted,

wherein the protective member covers only the second portion,
wherein all the plurality of long-distance transmission array antennas have the same physical length, or one or more long-distance
transmission array antennas among the plurality of long-distance transmission array antennas have different physical lengths,
and

wherein when the one or more long-distance transmission array antennas have the different physical lengths, the long-distance
transmission array antenna arranged at the center has the longest physical length and the physical lengths of the remaining
long-distance transmission array antennas decrease as approaching the opposite sides.

US Pat. No. 9,207,311

RADAR APPARATUS

MANDO CORPORATION, Pyeon...

1. A radar apparatus comprising:
a radar antenna unit including a transmission antenna unit and a reception antenna unit;
a printed circuit board, on which a signal transmission/reception unit is mounted, the signal transmission/reception unit
being configured to transmit a signal through the transmission antenna and to receive the transmitted signal through the reception
antenna when the transmitted signal is reflected from surroundings;

a base band circuit board mounted on a bottom side of the printed circuit board to perform a transmission/reception control
and an analog to digital conversion;

a signal processing printed circuit board on which a signal processing circuit unit is mounted; and
a base plate having a top side coupled to the bottom side of the printed circuit board, and a bottom side coupled to a top
side of the signal processing printed circuit board,

wherein the radar antenna unit and the signal transmission/reception unit are both arranged and mounted on a top side of the
printed circuit board.

US Pat. No. 9,156,490

STEERING COLUMN FOR VEHICLE

MANDO CORPORATION, Pyeon...

1. A steering column for a vehicle comprising:
a tilt bracket coupled to the steering column;
a fixed member coupled to an outer surface of the tilt bracket and having a plurality of first bosses protruding from a bottom
surface thereof at locations spaced apart from each other at a predetermined interval; and

an actuating member located to face the fixed member and having a plurality of second bosses protruding from a bottom surface
thereof and coupled between the first bosses while being coupled to or separated from the fixed member in a facing direction
during an operation of an adjusting lever,

wherein supports between which opposite ends of the fixed member are inserted are formed at opposite ends of the actuating
member, and

wherein one side bosses among the first bosses and the second bosses are arranged in a form of a grid having regular intervals
and the other side bosses thereof are arranged at locations corresponding to centers of eyelets of the grid.

US Pat. No. 9,145,949

REDUCER OF ELECTRIC POWER STEERING APPARATUS

MANDO CORPORATION, Pyeon...

1. A reducer of an electric power steering apparatus, comprising:
a worm shaft bearing coupled to a worm shaft, which is tooth-engaged with a worm wheel, at an end of the worm shaft opposite
to a motor shaft coupling portion;

a bearing bush fitted on an outer circumference surface of the worm shaft bearing and formed with a through-hole at a side
opposite to a worm wheel side;

a damping member fitted on an outer circumference surface of the bearing bush, the damping member having an inner circumference
surface on which elongated recesses are formed in an axial direction on opposite sides of the inner circumference surface
such that an inner diameter may be contracted toward the worm wheel side, and an outer circumference surface which is supported
on an inner surface of a gear housing;

a cover member coupled to an end of the gear housing opposite to the motor shaft coupling portion; and
a compression adjustment member coupled to the gear housing, and configured to compress the outer circumference surface of
the worm shaft bearing to elastically support the worm shaft bearing toward the worm wheel so as to compensate for a clearance
between the worm shaft and the worm wheel.

US Pat. No. 9,275,288

LANE RECOGNITION SYSTEM AND METHOD USING DEFOG SENSOR

MANDO CORPORATION, Pyeon...

1. A lane recognition system using a defog sensor, comprising:
a defog sensor mounted in a defogging system of a vehicle;
an imaging unit mounted on a windshield of the vehicle so as to image the front of the vehicle; and
an integrated control unit configured to analyze a defog sensor signal received from the defog sensor, process an image signal
received from the imaging unit based on the analyzed defog sensor signal, and acquire lane information,

wherein the defog sensor senses the temperature of the windshield and the external temperature, and
wherein when processing the image signal, the integrated control unit analyzes the defog sensor signal, and highlights edges
of the image in case where a difference between the temperature of the windshield and the external temperature is less than
a predetermined value.

US Pat. No. 9,221,449

ELECTRIC BRAKE SYSTEM FOR VEHICLE

MANDO CORPORATION, Pyeon...

1. An electric brake system for a vehicle, the electric brake system comprising:
a reservoir configured to store oil,
a master cylinder provided with two hydraulic circuits and adapted to generate hydraulic pressure using the oil stored in
the reservoir,

an input rod disposed to contact the master cylinder and configured to move forward according to foot force applied to a brake
pedal,

a pedal displacement sensor configured to sense a displacement of the brake pedal connected to the input rod;
a pressure supply unit connected to the reservoir via a hydraulic channel to receive oil from the reservoir, and the pressure
supply unit configured to supply hydraulic pressure according to the sensed displacement;

a hydraulic control unit configured to perform braking of the vehicle according to the hydraulic pressure supplied by the
pressure supply unit;

first and second switching valves linked between the pressure supply unit and the hydraulic control unit, and configured to
control a transfer of hydraulic pressure to the hydraulic control unit by opening and closing operations of the switching
valves;

a first pressure sensor connected to the pressure supply unit, respectively, and configured to sense pressure on the pressure
supply unit;

a second pressure sensor connected to the master cylinder, and configured to sense pressure on the master cylinder;
a return channel connected to the hydraulic channel, and configured to allow the hydraulic pressure which is supplied to the
hydraulic control unit to be discharged therethrough and transferred to the pressure supply unit;

a check valve installed in the hydraulic channel to prevent backflow of pressure from the pressure supply unit and configured
to allow the oil to be suctioned into and stored in the pressure supply unit;

a simulator connected to the master cylinder and configured to provide reaction force according to the foot force applied
to the brake pedal; and

an electronic control unit (ECU) connected to the pedal displacement sensor and the first and second pressure sensors, and
configured to control

the pressure supply unit to supply the hydraulic pressure according to the sensed displacement from the pedal displacement
sensor, and

the first and second switching valves based on information from the pedal displacement sensor and first and second pressure
sensors,

wherein the pressure supply unit comprises,
a pressure chamber connected to the hydraulic channel to receive the oil,
a hydraulic piston arranged in the pressure chamber,
a hydraulic spring arranged in the pressure chamber to elastically support the hydraulic piston,
a motor connected to the ECU and configured to generate rotational force according to the sensed displacement, and
a ball-screw member coupled with the motor and the hydraulic piston, and configured to convert the rotational force into rectilinear
motion so that the oil in the pressure chamber is pressurized by the hydraulic piston,

wherein the hydraulic control unit comprises,
a first wheel braking circuit provided at a first wheel and configured to receive the hydraulic pressure supplied thereto
to perform braking, and

a second wheel braking circuit provided at a second wheel and configured to receive the hydraulic pressure supplied thereto
to perform braking,

wherein the first and second switching valves are connected to the first and second circuits respectively, and the first switching
valve is configured to control the hydraulic pressure supplied to the first circuit, and the second switching valve is configured
to control the hydraulic pressure supplied to the second circuit, and

wherein the first switching valve is a Normally Opened solenoid valve, and the second switching valve is a Normally Closed
solenoid valve.

US Pat. No. 9,488,256

NUT SCREW CONVEYING DEVICE

MANDO CORPORATION, Pyeon...

1. A nut screw conveying device comprising:
a nut having a plurality of threads spirally formed on an inner surface of the nut; and
a screw having a plurality of rotating media,
wherein
each rotating media of the plurality of the rotating media is engaged with a corresponding thread of the plurality of threads,
coupling the nut with the screw,

each thread of the plurality of the threads is separated from an adjacent thread of the plurality of threads by a pitch,
one or more of the pitches separating the threads of the plurality of the threads is different from at least one other pitch
separating the threads of the plurality of threads,

the nut or the screw is configured to be rotated, and the other of the nut or the screw is configured to translate based on
a rotation of the nut or based on a rotation of the screw,

the nut has a first section and a second section, a first pitch separating threads of the plurality of the threads in the
first section is less than a second pitch separating threads of the plurality of the threads in the second section, and

a difference between the first pitch and the second pitch is configured to cause an output stroke of the nut or the screw
that is configured to translate to be decreased, and a torque of the nut or the screw that is configured to translate to be
increased, based on a constant rotating speed of the other of the nut or the screw as the nut or the screw configured to translate
moves from the second section to the first section, wherein the number of rotating media is equal to the number of threads
formed on the inner circumference of the nut, and wherein each of the rotating media includes a bearing rotatably mounted
on a rod, an axis of each of the rods extending at an angle from a central axis of the screw, the angle being less than 90
degrees.

US Pat. No. 9,300,148

APPARATUS FOR CHARGING BOTH MAIN BATTERY AND AUXILIARY BATTERY USING THE SAME PRIMARY WINDING AND TWO DIFFERENT SECONDARY WINDINGS OF SINGLE TRANSFORMER

Mando Corporation, Gyeon...

1. A battery charging apparatus comprising:
a hybrid power converting unit using a common transformer to separately convert AC power into a first voltage and a second
voltage for charging a high voltage battery and an auxiliary battery;

a high voltage charging unit dropping the first voltage output from the hybrid power converting unit and charging the high
voltage battery with the dropped first voltage;

an auxiliary voltage charging unit dropping the second voltage output from the hybrid power converting unit or a voltage of
the high voltage battery, and charging the auxiliary battery with the dropped second voltage or the dropped voltage of the
high voltage battery; and

a switching unit switching an electrical connection between the AC power and the auxiliary voltage charging unit and switching
an electrical connection between the high voltage battery and the auxiliary voltage charging unit, such that the second voltage
generated by the conversion of the AC power or the voltage of the high voltage battery is selectively input to the auxiliary
voltage charging unit,

wherein:
in a first mode, the charging of the high voltage battery and the charging of the auxiliary battery by the AC power are performed
by the switching operation of the switching unit, and in a second mode, the charging of the high voltage battery by the AC
power is stopped and the charging of the auxiliary battery by the voltage of the high voltage battery is performed by the
switching operation of the switching unit,

the switching unit comprises a first switching unit switching the supply or interrupt of the AC power, and a second switching
unit, installed between both terminals of the high voltage battery and both terminals of a primary winding of the common transformer,
switching the transfer of the voltage of the high voltage battery to the auxiliary voltage charging unit,

in the first mode, the first switching unit is switched to an ON state and the second switching unit is switched to an OFF
state, and in the second mode, the first switching unit is switched to an OFF state and the second switching unit is switched
to an ON state, and

the common transformer includes the primary winding and first and second secondary windings having different turns ratios
for the power conversion into the first voltage and the second voltage, the both terminals of the primary winding being electrically
connected to the AC power, both terminals of the first secondary winding being electrically connected to the both terminals
of the high voltage battery, and both terminals of the second secondary winding being electrically connected to both terminals
of the auxiliary battery.

US Pat. No. 9,261,162

DAMPING FORCE CONTROLLING VALVE ASSEMBLY FOR SHOCK ABSORBER

MANDO CORPORATION, Gyeon...

1. A damping force controlling valve assembly for a shock absorber using a solenoid part for variation of a damping force,
comprising:
a first valve body having an inlet passage through which a working fluid flows in from the valve assembly;
a second valve body coupled to the first valve body with a gap therebetween;
a main valve disposed between the inlet passage and a back-pressure chamber to resist the working fluid flowing through the
inlet passage, and the main valve including one or more valve disks;

a valve spring disposed in the gap between the first valve body and the second valve body and elastically supporting the one
or more valve disks of the main valve, and ends of the valve spring being mounted to the second valve body and the main valve,
respectively, to connect the one or more valve disks with the second valve body;

a spool operation part penetrating through the center of the first valve body and the second valve body; and
a base retainer having a protrusion which protrudes from an upper outer surface thereof to be fitted onto a groove formed
at an upper portion of the solenoid part, so that the second valve body is detachably coupled to the base retainer while being
coupled to the first valve body,

wherein the valve spring comprises: a circular valve core at one end thereof that contacts the main valve; and a sealing disk
connected between the circular valve core and the spool operation part.

US Pat. No. 9,180,905

ELECTRIC POWER STEERING APPARATUS FOR VEHICLE

MANDO CORPORATION, Pyeon...

1. An electric power steering apparatus for a vehicle, comprising:
an electric motor supported on an inner peripheral surface of a housing, having a hollow shape, and including a motor shaft
on which a sun gear is mounted on an outer peripheral surface of one end thereof;

a planetary gear assembly which includes a first ring gear fitted in and fixed to the housing at a side of the motor, a second
ring gear provided at a side of the first ring gear opposite to the motor, a plurality of planetary gears which are externally
engaged with the sun gear while being internally engaged with the first and second ring gears respectively, and a carrier
which both ends of a central shaft of the planetary gear is coupled to and supported on; and

a pinion shaft extending through the motor shaft, and having one end thereof on an outer peripheral surface of which a pinion
gear is mounted to be engaged with a rack gear formed on a rack bar, and the other end thereof which is connected to the input
shaft by means of the torsion bar, the pinion shaft being connected to the second ring gear.

US Pat. No. 9,316,296

REDUCER INCLUDING PLANETARY GEAR AND STEERING APPARATUS FOR VEHICLE INCLUDING THE SAME

Mando Corporation, Pyeon...

1. A reducer for a steering apparatus of a vehicle comprising:
a sun gear coupled to a hollow motor shaft;
a plurality of first planet gears circumscribed about the sun gear and inscribed in a first ring gear that is coupled and
fixed to an inner peripheral surface of a housing;

a plurality of second planet gears inscribed in a second ring gear to which a pinion shaft, which is inserted into the hollow
motor shaft, is coupled, the plurality of second planet gears being connected to the first planet gears via connecting shafts;

a carrier, through which the pinion shaft passes, having coupling holes such that the connecting shafts pass through and are
coupled to the coupling holes, in which a distance from the center of the carrier to the center of a first coupling hole of
the coupling holes and a distance from the center of the carrier to the centers of the remaining coupling holes are different;
and

a first resilient member coupled between a first connecting shaft among the connecting shafts and the first coupling hole,
wherein the first connecting shaft is inserted into the first coupling hole.

US Pat. No. 9,278,697

VEHICLE RUNNING CONTROL APPARATUS AND METHOD

MANDO CORPORATION, Pyeon...

1. A vehicle running control apparatus comprising:
A drive controller configured to control a drive torque output from an engine of a vehicle;
A pulling compensation controller configured to calculate a pulling compensation torque based on at least one of a slip compensation
torque map, a rotation speed deviation and torque bias to compensate pulling of the vehicle which occurs when the drive torque
output is transferred to left and right drive shafts; and

An EPS controller configured to generate a steering auxiliary power based on the pulling compensation torque such that the
steering auxiliary power is transferred to a wheel of the vehicle;

Wherein the pulling compensation controller includes:
A torque bias calculator configured to calculate the torque bias based on a deviation between drive torques which is generated
when the drive torque output from the engine of the vehicle is transferred to the left and right drive shafts;

A speed deviation calculator configured to receive rotation speed information of the front wheels and the rear wheels of the
vehicle from a wheel speed sensor and calculate the rotation speed deviation from each piece of the received rotation speed
information; and

A pulling compensation torque calculator configured to calculate the pulling compensation torque based on the calculated torque
bias and rotation speed deviation such that the steering auxiliary power is generated.

US Pat. No. 9,346,516

ELECTRIC BICYCLE AND CONTROL METHOD THEREOF

MANDO CORPORATION, Gyeon...

1. An electric bicycle comprising:
a hub motor including a motor housing configured to rotate with a wheel;
a sprocket connected to a chain so as to rotate by receiving rider pedaling force through the chain;
a first speed detector to detect a speed of the hub motor;
a second speed detector to detect a speed of the sprocket;
a motor driving unit to drive the hub motor; and
an electronic control unit to compare the speed of the hub motor with the speed of the sprocket and control the motor driving
unit to perform speed control of the hub motor according to a comparison result,

wherein the second speed detector includes:
a magnet provided at the motor housing and disposed adjacent to teeth formed at an outer peripheral surface of the sprocket;
a magnetic substance disposed apart from the magnet at a distance corresponding to a gap between the teeth of the sprocket
or more gaps;

a magnetic substance assembly connected with the magnetic substance and configured to rotate with the motor housing when the
motor housing rotates;

a PCB substrate fixed to a shaft of the hub motor so as not to rotate whereas the motor housing is rotatable; and
a hall sensor provided at the PCB substrate and disposed adjacent to the magnetic substance assembly so as to detect the rotating
speed of the sprocket by detecting a change of a magnetic field of the magnetic substance assembly to which a magnetic field
formed at the magnet and the magnetic substance is transmitted when the teeth of the sprocket rotate.

US Pat. No. 9,205,866

STEERING CONTROL APPARATUS AND METHOD

MANDO CORPORATION, Pyeon...

1. A steering control apparatus, comprising:
a determining unit which calculates a first Yaw rate value based on a steering angle measured by a torque sensor and compares
the first Yaw rate value with a second Yaw rate value measured by a Yaw rate sensor to determine a turning state of a vehicle
according to a result of the comparison; and

a controller configured to adjust a control amount for a control disturbing an alignment of tires to return the vehicle to
a normal turning state if it is determined that the vehicle is in an abnormal state,

wherein the control amount for the control disturbing the alignment of the tires is a value of an electric current for damping-control
or returning-control, and

the electric current is a damping-control current for restricting a rapid movement of a gear or a returning-control current
for aligning the tires at the steering angle of 0 degree.

US Pat. No. 9,291,231

FREQUENCY SENSITIVE TYPE SHOCK ABSORBER

MANDO CORPORATION, Gyeon...

1. A frequency sensitive type shock absorber, which includes a cylinder and a piston valve partitioning the cylinder into
a rebound chamber and a compression chamber, the frequency sensitive type shock absorber comprising:
an inner passage which connects a through-hole formed in a side of the piston rod to an opening formed in a lower portion
thereof;

a housing which is connected to a lower portion of the piston rod and in which a chamber part is formed, the housing including
a bypass hole formed such that an upper portion of the chamber part is opened to connect to the opening, and a lower portion
of the chamber part communicates with the compression chamber;

a spool which is formed within the chamber part and is elevated by a fluid flowing into the chamber part;
a pair of partition members which extend from a side of the chamber part to an outer periphery of the spool to partition the
chamber part into an upper chamber and a lower chamber and provide a restoring force to the spool, and each of partition members
having a passage on a width surface thereof between the upper chamber and the lower chamber such that the upper and lower
chambers communicate with each other;

a guide member which is formed between the pair of the partition members, has an elastic force, and guides the pair of the
partition members to maintain a position thereof; and

a pair of elastic members which are formed in the upper chamber and the lower chamber to prevent the fluid from penetrating
between the pair of the partition members and the side of the chamber part, and assist a restoration of the partition members
by elasticity.

US Pat. No. 9,199,663

RACK-DRIVEN AUXILIARY POWER STEERING APPARATUS

MANDO CORPORATION, Pyeon...

1. A rack-driven auxiliary power steering apparatus comprising:
a ball nut coupled to a rack bar via balls and having a first axial groove on an outer peripheral surface thereof;
a nut pulley coupled to the outer peripheral surface of the ball nut and having a second axial groove at a location corresponding
to the first axial groove; and

a resilient support member coupled between the ball nut and the nut pulley,
wherein the resilient support member is arranged in a space defined by the first axial groove and the second axial groove,
wherein the resilient support member has a hollow shape coupled to the space defined by the first axial groove and the second
axial groove, and has a cutaway portion cut axially from one end to an opposite end thereof.

US Pat. No. 9,187,094

DEVICE AND METHOD FOR CONTROLLING SPEED OF VEHICLE

MANDO CORPORATION, Pyeon...

1. A device for controlling a vehicle speed, the device comprising:
a digital map unit configured to determine a current location of a vehicle and a curvature of a forward path;
a weather information extracting unit configured to extract weather conditions outside the vehicle;
a safe speed determining unit configured to determine a safe speed of the vehicle based on the curvature of the forward path
and the extracted weather conditions;

a vehicle speed sensor configured to measure a travelling speed of the vehicle;
an alarm unit configured to notify a warning signal; and
a controller configured to control the vehicle speed such that the vehicle is decelerated when the travelling speed of the
vehicle is higher than the safe speed,

wherein the weather information extracting unit comprises a driver operated sensor configured to detect an operation of a
wind shield wiper and an operation of a fog light, wherein the controller is configured to generate the warning signal when
the travelling speed of the vehicle is higher than the safe speed,

wherein the safe speed determining unit is configured to calculate an allowable lateral acceleration based on the curvature
of the forward path, and

to determine the safe speed based on the allowable lateral acceleration and the extracted weather conditions, and
wherein the safe speed determining unit is configured to calculate the safe speed by reducing the allowable lateral acceleration
based on a predetermined weather condition when the weather condition extracting unit judges that it is snowing, raining,
foggy, or the forward path is frozen.

US Pat. No. 9,096,203

BRAKE MASTER CYLINDER

MANDO CORPORATION, Pyeon...

1. A brake master cylinder comprising a cylinder body connected to a booster, first and second pistons to reciprocate in the
cylinder body, and a Hall sensor installed at an outside of the cylinder body, to sense operation of the pistons, for control
of activation of brake lamps, further comprising:
a coupling shaft formed at an end of the second piston facing the first piston; and
a magnet ring assembly installed at the coupling shaft such that the magnet ring assembly faces the Hall sensor,
wherein the magnet ring assembly comprises:
a bushing centrally formed with a fitting hole extending in a longitudinal direction of the bushing such that the coupling
shaft is fitted in the fitting hole; and

a ring-shaped magnet fitted around an outer surface of the bushing, to exert magnetic force on the Hall sensor,
wherein the bushing comprises a cylindrical fitting portion centrally formed with the fitting hole and formed with at least
one vent hole extending in the longitudinal direction of the bushing to exhaust air existing between the bushing and the second
piston.

US Pat. No. 9,522,675

PARKING CONTROL SYSTEM AND CONTROL METHOD THEREOF

MANDO CORPORATION, Gyeon...

1. A parking control system comprising:
a parking mode selection unit that supports a first-stage selection and a second-stage selection, wherein one of a right perpendicular
parking mode, a left perpendicular parking mode, a right parallel parking mode, and a left parallel parking mode is selectable
in the first-stage selection, and a head-in parking mode or a reverse parking mode is selectable in the second-stage selection
in cases where the right perpendicular parking mode or the left perpendicular parking mode is selected in the first-stage
selection;

a sensor unit comprising a plurality of sensors mounted on one or more of the front, rear, and sides of a vehicle;
a parking space search unit that searches for a parking space based on a value detected by the sensor unit;
a path setting unit that sets a parking path along which the vehicle is parked in the parking space, which is discovered by
the parking space search unit, according to the parking mode selected by the parking mode selection unit; and

a parking controller that controls the vehicle to move along the parking path set by the path setting unit,
wherein the parking space search unit searches for the parking space when the speed of the vehicle is reduced to a predetermined
speed or lower.

US Pat. No. 9,216,722

SEALING MEMBER FOR MASTER CYLINDER

MANDO CORPORATION, Pyeon...

1. A sealing member for a master cylinder, which is formed in a ring shape and is installed between an inner surface of a
cylinder body and an outer surface of a piston, comprising:
an inner wing part configured to contact the outer surface of the piston;
an outer wing part configured to contact the inner surface of the cylinder body; and
a sealing rear wall part configured to connect the inner wing part and the outer wing part,
wherein the sealing rear wall part is provided with an oil passage to connect an oil entrance formed at the inner wing part
and an oil entrance formed at the outer wing part, and the oil passage includes a retardation passage which is longer than
a shortest straight-line distance which directly connects the oil entrances.

US Pat. No. 9,371,086

STEERING COLUMN FOR VEHICLE AND STEERING APPARATUS HAVING THE SAME

MANDO CORPORATION, Pyeon...

1. A steering column for a vehicle comprising:
a hollow lower tube enclosing a steering shaft; and
an upper tube fitted on an outer periphery of the lower tube,
wherein the upper tube includes: a first portion on which a first slot is slit axially; a second slot is slit circumferentially
at the lower end of the first slot; supporting parts protrude from an outer periphery of the first portion at an upper side
of the second slot to be diametrically opposed to each other; one or more stress dispersion parts are formed on the outer
periphery of the first portion at an axially upper side of the supporting parts to disperse stresses; and a second portion
on which an upper tube hole is formed,

wherein the first portion protrudes upwardly from an outer periphery of the second portion so that the first portion has an
outer circumference greater than that of the second portion,

wherein the supporting parts are formed at circumferentially opposite sides of the first slot on the first portion of the
upper tube, and

wherein the one or more stress dispersion parts are formed by a through-hole spaced from the first slot by a predetermined
distance between the first slot and the upper tube hole.

US Pat. No. 9,071,175

ELECTRIC BICYCLE DRIVING APPARATUS

MANDO CORPORATION, Pyeon...

1. An electric bicycle driving apparatus comprising:
a speed change mode operator to selectively output one of a first speed change mode signal and a second speed change mode
signal;

a controller to receive the first speed change mode signal or second speed change mode signal output from the speed change
mode operator and output a first control signal corresponding to the first speed change mode signal or a second control signal
corresponding to the second speed change mode signal;

a motor driver to, when the speed change mode operator outputs the first speed change mode signal, receive the first control
signal and output a first motor driving signal to drive a motor in a first speed change mode, and, when the speed change mode
operator outputs the second speed change mode signal, receive the second control signal and output a second motor driving
signal to drive the motor, the motor rotating with a driving force of the first motor driving signal, in a second speed change
mode; and

a relay to selectively receive a relay switching enable signal from the controller, the relay being turned on in response
to the relay switching enable signal to provide at least one of the first motor driving signal and second motor driving signal
to the motor,

wherein the relay further includes at least one Zener Diode to cut off an abnormal signal from at least one of the motor driver
and the motor.

US Pat. No. 9,254,845

SYSTEM FOR PREVENTING VEHICLE COLLISION USING YAW RATE AND METHOD OF PREVENTING VEHICLE COLLISION USING THE SAME

Mando Corporation, Pyeon...

1. A method of preventing vehicle collision, comprising steps of:
estimating collision with an object at a steering detector of a vehicle;
calculating a yaw rate of the vehicle at a calculator when the collision with the object is estimated to occur;
calculating a target steering angle according to the yaw rate calculated by the calculator;
comparing the calculated yaw rate with a threshold value by the calculator; and
performing a steering operation for returning the vehicle according to the target steering angle by at least one of a wheel
controller and a brake controller.

US Pat. No. 9,522,678

ADAPTIVE CRUISE CONTROL SYSTEM INTERLOCKING WITH LANE KEEPING ASSIST SYSTEM AND CONSTANT SPEED CONTROL METHOD THEREFOR

MANDO CORPORATION, Pyeon...

1. An adaptive cruise control system interlocking with a lane keeping assist system (LKAS), comprising
a radar that detects a preceding vehicle ahead and measure an inter-vehicle distance; and
an electronic control unit that controls acceleration and deceleration of a vehicle according to an initial request acceleration
calculated to maintain an appropriate distance from the preceding vehicle, the initial request acceleration is requested by
a driver,

wherein the electronic control unit calculates a maximum request acceleration that is changed according to an auxiliary steering
torque received from the LKAS which prevents lane departure and a change amount in the maximum request acceleration, and controls
acceleration and deceleration of the vehicle based on a final request acceleration determined by using the calculated maximum
request acceleration, the calculated change amount in the maximum request acceleration, and the calculated request acceleration.

US Pat. No. 9,519,833

LANE DETECTION METHOD AND SYSTEM USING PHOTOGRAPHING UNIT

MANDO CORPORATION, Pyeon...

1. A lane detection method comprising:
acquiring an image in front of a vehicle using a photographing device provided in the vehicle;
detecting, from the acquired image, a positive edge (P.E.) a lane in which a right pixel has a higher brightness value than
a brightness value of a left pixel;

detecting, from the acquired image, a negative edge (N.E.) of the lane in which a left pixel has a higher brightness value
than a brightness value of a right pixel;

calculating the number of pixels corresponding to a width of the lane;
generating a first expansion image of the lane by expanding a pixel from the P.E. by a length corresponding to the calculated
number of pixels on a right side of the P.E., so that the first expansion image has the width of the lane;

generating a second expansion image of the lane by expanding a pixel from the N.E. by the length corresponding to the calculated
number of pixels on a left side of the N.E., so that the second expansion image has the width of the lane; and

detecting the lane by performing an AND operation from the first expansion image and the second expansion image.

US Pat. No. 9,421,843

ACTIVE SUSPENSION APPARATUS FOR VEHICLE AND PUMP APPLIED THERETO

MANDO CORPORATION, Pyeon...

1. An active suspension apparatus for a vehicle, comprising:
a pump having a motor and configured to adjust movements of a fluid; and
actuators configured to receive the fluid from the pump and to compensate displacements of coil springs connected to wheels
of the vehicle,

wherein the pump supplies the fluid contained in a cylinder to one of the actuators of left wheels of the vehicle and the
actuators of right wheels of the vehicle based on driving of the motor.

US Pat. No. 9,404,553

SHOCK ABSORBER

MANDO CORPORATION, Pyeon...

1. A shock absorber, comprising:
a cylinder filled with a fluid;
a piston valve dividing the cylinder into a rebound chamber and a compression chamber;
a piston rod extending to the outside of the cylinder, and connected to the piston valve;
a free piston which
divides the rebound chamber into an upper chamber and a lower chamber, wherein the piston rod is configured to vertically
pass through the free piston, and

forms a vertical passage, wherein the upper chamber and the lower chamber are connected to each other through the vertical
passage; and

a support which
is disposed below the free piston,
is connected to the piston rod,
has a larger diameter than the piston rod,
is configured to increase a pressure of the upper chamber by approaching to the free piston from below during a rebound stroke
of the piston rod, and

forms a horizontal passage connected to the vertical passage,
wherein the piston rod includes a locking groove disposed along a horizontal direction of the piston rod,
wherein the free piston includes a locking portion configured to move downward together with the locking groove during only
compression stroke of the piston rod, and

wherein, when the locking portion moves downward, the locking portion is locked to and supported by the locking groove.

US Pat. No. 9,274,216

RADAR APPARATUS AND AN ANTENNA APPARATUS

MANDO CORPORATION, Pyeon...

1. A radar apparatus comprising:
an antenna unit having: a long range transmission antenna unit with a plurality of long range transmission array antennas;
a short range transmission antenna unit with one or more short range transmission array antenna; and a reception antenna unit
with a plurality of reception array antennas; and

a signal transmission and reception unit for transmitting a signal through at least one of the long range transmission antenna
unit and the short range transmission antenna unit, and receiving an echo signal of the transmitted signal reflected off surroundings
through the reception antenna unit,

wherein the long range transmission array antenna arranged in the middle of the plurality of long range transmission array
antennas has the longest length and lengths of the other long range transmission array antennas decrease from the middle toward
both sides,

wherein the number of the plurality of the long range transmission array antennas is proportional to a sensing distance of
a reference long sensing range, the number of the one or more short range transmission antenna is proportional to a sensing
distance of a reference short sensing range, and the number of the plurality of long range transmission array antennas is
larger than the number of the one or more short range array antenna.

US Pat. No. 9,269,269

BLIND SPOT WARNING SYSTEM AND METHOD

Mando Corporation, Gyeon...

1. A blind spot warning system for warning whether a target vehicle is located in a blind spot formed at a posterolateral
area of a host vehicle, the system comprising;
a line-to-line space-generating unit generating line-to-line space data with respect to a lane width, which changes when the
host vehicle is driven, in real time;

at least one distance-measuring unit measuring a distance between the host vehicle and a target vehicle located in a side
zone or a rear zone of the host vehicle;

an input unit receiving the line-to-line space data from the line-to-line space-generating unit and receiving distance measurement
information from the distance-measuring unit;

a comparison unit comparing target vehicle distance data based on the distance measurement information transferred from the
distance-measuring unit with the line-to-line space data to decide whether the target vehicle is located within a threshold
vehicle-to-vehicle distance determined based on the line-to-line space data;

a conversion unit for converting the line-to-line space data received from the line-to-line space-generating unit via the
input unit into data for the threshold vehicle-to-vehicle distance; and

a warning output unit outputting a warning if the target vehicle is located within the threshold vehicle-to-vehicle distance
in the blind spot formed at the posterolateral area of the host vehicle.

US Pat. No. 9,205,889

FOLDABLE ELECTRIC BICYCLE AND CONTROL METHOD THEREOF

MANDO CORPORATION, Gyeon...

1. A foldable electric bicycle comprising a drive motor to rotate at least one of a front wheel and a rear wheel, and an actuation
lever to lock or unlock rotation between a front frame provided with the front wheel and a rear frame provided with the rear
wheel by shifting the actuation lever so as to fold the electric bicycle or maintain a folded state or an unfolded state of
the electric bicycle, the foldable electric bicycle comprising:
an actuation lever sensing unit to sense whether the actuation lever is at a locked position in which the rotation between
the front frame and the rear frame is locked or at an unlocked position in which the rotation between the front frame and
the rear frame is unlocked;

a motor driving unit to drive the drive motor;
a control unit which controls the motor driving unit to drive the drive motor in order to generate torque between the front
frame and the rear frame by movement of the wheels when a position of the actuation lever is sensed by the actuation lever
sensing unit and the actuation lever is shifted from the locked position to the unlocked position; and

a throttle opening degree sensing unit configured to sense an opening degree of a throttle to accelerate the foldable electric
bicycle,

wherein the control unit is configured to control the motor driving unit to drive the drive motor in response to the opening
degree of the throttle, sensed by the throttle opening degree sensing unit, in folding operation or the folded state of the
electric bicycle.

US Pat. No. 9,384,926

METHOD AND APPARATUS FOR RESTORING MECHANICAL RELAY FROM STUCK FAULT TO NORMAL CONDITION

MANDO CORPORATION, Pyeon...

1. A method for restoring a relay from a stuck fault to a normal condition in an apparatus comprising a power source unit,
the relay, a relay driver, a Main Control Unit (MCU), and an Electronic Control Unit (ECU), the method comprising steps of:
detecting, by the MCU, a short state or open state of the relay;
repeatedly transferring, by the MCU, a current application signal and a current non-application signal to the relay driver
when the relay is in the short state;

repeating, by the relay driver, an operation of periodically applying an electric current from the power source unit to the
relay in response to the current application signal and the current non-application signal so that a release of a contact
point of the relay is induced;

detecting, by the MCU, the release state of the contact point of the relay; and
maintaining, by the MCU, the ECU in an operating state when the contact point of the relay is released.

US Pat. No. 9,383,765

PEDAL SIMULATOR FOR ACTIVE BRAKE SYSTEM

Mando Corporation, Pyeon...

1. A pedal simulator for an active brake system, which is installed at a master cylinder to receive a hydraulic pressure corresponding
to a driver's pedal force and to provide pedal feeling to the driver, comprising:
a simulator block having an oil hole connected with the master cylinder at an upper portion thereof and having a bore therein
to be in communication with the oil hole;

a damping housing coupled to seal a lower end of the bore;
a first reaction piston provided in the bore to be slidable by oil introduced from the master cylinder;
a second reaction piston slidably provided in the bore and disposed under the first reaction piston to be spaced apart from
the first reaction piston in a predetermined distance;

a first damping member installed at the first reaction piston to be moved together with the first reaction piston;
a second damping member installed at the damping housing and configured to provide a reaction force by pressing of the second
reaction piston; and

a reaction spring provided between the second reaction piston and the damping housing,
wherein an insertion groove recessed upward to install the first damping member is formed at a lower end of the first reaction
piston, and

the second damping member has a wing part protruding radially from an outer circumferential surface at an upper portion of
the second damping member in a non-deformed state of the second damping member,

wherein the wing part is configured to prevent direct contact between the second reaction piston and an upper end of the damping
housing when the second damping member is elastically deformed.

US Pat. No. 9,311,543

SYSTEM AND METHOD FOR RECOGNIZING SPEED LIMIT SIGN USING FRONT CAMERA

MANDO CORPORATION, Gyeon...

1. A method for recognizing a speed limit sign using a front camera, comprising:
acquiring a front image using a front camera;
detecting, by a traffic sign detector comprising a horizontal detector and a vertical detector, a traffic sign from the acquired
front image using a Haar-Feature based Viola-Jones Adaptive Boosting (Adaboost) algorithm;

recognizing an internal numeral in the detected traffic sign;
tracking a traffic sign continuously appearing in the front image, and eliminating a temporarily misrecognized object; and
determining a result of recognition on the recognized traffic sign,
wherein a region of overlap of the horizontal detector and the vertical detector comprises an actual traffic sign region.

US Pat. No. 9,261,160

PISTON VALVE OF SHOCK ABSORBER

MANDO CORPORATION, Pyeon...

1. A piston valve of a shock absorber, comprising:
a main valve unit coupled to a lower end of a piston rod which has an orifice hole, to divide an inside of a cylinder into
an extension chamber and a compression chamber, the main valve unit generating an attenuation force according to a difference
of pressure between the extension chamber and the compression chamber; and

a frequency sensitive valve unit installed at one side of the main valve unit and configured to generate an attenuation force
according to a frequency of hydraulic fluid delivered through the orifice hole of the piston rod; and

a valve housing having a space which communicates with the orifice hole and coupled to the lower end of the piston rod, so
that the main valve unit is coupled to an outer circumferential surface of the valve housing and the frequency sensitive valve
unit is installed in the space of the valve housing,

wherein the valve housing has a variable inner diameter so that an inner diameter at which the valve housing and the lower
end of the piston rod are coupled is smaller than an inner diameter at which the frequency sensitive valve unit is installed
in the space, and

the frequency sensitive valve unit is installed within the main valve unit.

US Pat. No. 9,538,073

CONTROLLING DEVICE AND METHOD OF VEHICLE CAMERA

MANDO CORPORATION, Gyeon...

1. A control method of a vehicle camera, comprising:
manipulating a multi-function switch to operate a wiper connected to a wiper relay at a predetermined cycle;
synchronizing, by a camera controller connected to the vehicle camera, an imaging operation of the vehicle camera to image
the front of the vehicle with the operation of the wiper;

estimating, by an image filter connected to the camera controller, a position of the wiper based on a cycle of the operation
of the wiper; and

when the position of the wiper is estimated, setting, by the image filter, the estimated position of the wiper as a region
of interest, and removing the wiper in an image taken by the vehicle camera by extracting an edge within the region of interest.

US Pat. No. 9,281,767

MOTOR DRIVING APPARATUS

MANDO CORPORATION, Pyeon...

1. A motor driving apparatus comprising:
an actuator configured to convert electric energy into rotary motion;
a monitoring unit configured to:
monitor a state of the actuator;
generate a first output voltage based on the state of the actuator and a first offset voltage; and
generate a second output voltage independent of the state of the actuator, the second output voltage being based on a second
offset voltage based on the first offset voltage;

a control unit configured to:
determine if the monitoring unit is operating normally or abnormally based on a comparison of the second output voltage with
the second offset voltage; and

generate a control signal based on the determination of whether the monitoring unit is operating normally or abnormally; and
a driving signal generation unit configured to generate a driving signal for driving the actuator based on the control signal.

US Pat. No. 9,139,253

ELECTRIC BICYCLE

MANDO CORPORATION, Gyeon...

1. An electric bicycle comprising:
a hub motor assembly provided at a wheel to supply driving force;
an electronic control unit provided in the hub motor assembly; and
a wireless communication device mounted to a wheel shaft of the electric bicycle and electrically connected to the electronic
control unit,

wherein the wheel shaft is provided with a sprocket, which is connected to pedals, at one end portion thereof, and is provided
with the wireless communication device at the other end portion thereof.

US Pat. No. 9,533,541

ACTIVE SUSPENSION APPARATUS FOR VEHICLE AND VALVE THEREOF

MANDO CORPORATION, Gyeon...

1. An active suspension apparatus for a vehicle, comprising:
a pump configured to control movement of a fluid;
an actuator connected with a coil spring, which is connected with a wheel of the vehicle, and configured to receive the fluid
from the pump and to compensate for a displacement of the coil spring;

a fluid path configured to connect the pump with the actuator; and
one or more valves configured to control a flow of the fluid in the fluid path;
wherein at least one of the valves is configured to prevent the fluid from moving from the actuator to the pump by a pressure
of the fluid accommodated in the actuator when the actuator is controlled to receive the fluid from the pump,

wherein the pump comprises a first chamber and a second chamber formed by dividing an inside of a cylinder in a longitudinal
direction of the cylinder, and a first piston and a second piston are disposed at the first chamber and the second chamber,
respectively, and

wherein the first piston and the second piston are moved based on the driving of the motor, and the fluid accommodated in
the first chamber and the second chamber is supplied to the actuator.

US Pat. No. 9,481,427

BICYCLE KICKSTAND

MANDO CORPORATION, Gyeon...

1. A bicycle kickstand comprising:
a crank arm to mount a pedal to a bicycle frame, the crank arm having a slot formed in a longitudinal direction thereof;
the pedal coupled perpendicular to the slot of the crank arm and configured to rotate in the longitudinal direction of the
crank arm;

a middle arm received in the slot of the crank arm and having both end portions which are respectively connected to the crank
arm and the pedal in order to allow the pedal to be inclined with respect to the crank arm; and

a safety pin configured to be inserted through the slot of the crank arm and the pedal in order to support the pedal in a
perpendicular state or an inclined state with respect to the crank arm,

wherein the crank arm is provided with a rotation pin which is inserted through the slot of the crank arm, and the middle
arm has an arm slit through which the rotation pin is inserted.

US Pat. No. 9,409,593

RACK TYPE ELECTRIC POWER STEERING APPARATUS

MANDO CORPORATION, Pyeon...

1. A electric power steering apparatus comprising:
a rack housing that surrounds a rack bar that is coupled to a driven pulley, has a through-hole through which a motor shaft
of a motor coupled to a driving pulley passes, and has a guide hole that is spaced apart from the through-hole, and having
a first inclined portion of which a cross-section in a direction in which the motor is coupled is changed;

a motor housing to which the rack housing is coupled, on which the motor is mounted such that the motor shaft passes through
the through-hole, and which has a coupling recess at a location corresponding to the guide hole; and

a support body that passes through the guide hole to be coupled to the coupling recess and has a second inclined portion corresponding
to the first inclined portion such that the driving pulley is moved away from the driven pulley when being coupled.

US Pat. No. 9,051,982

ELECTRIC CALIPER BRAKE WITH PARKING FUNCTION

MANDO CORPORATION, Pyeon...

1. An electric caliper brake with a parking function comprising:
a caliper submodule comprising a pair of pad plates disposed on both sides of a disc to apply pressure to the disc to perform
braking, a caliper housing provided with a cylinder having a piston for application of pressure to the pad plates installed
therein to be movable forward and backward, and a spindle unit provided with a nut installed through a rear portion of the
cylinder to apply pressure to the piston by converting rotational movement into rectilinear movement at the caliper housing
to convert rotational motion into rectilinear motion, and a screw coupled to the nut;

an actuator submodule comprising a motor to produce a braking force to perform a braking function and the parking function,
and a gear assembly configured with a plurality of gears to reduce a rotational speed of the motor; and

a self-locking module to transfer a rotational power by connecting a final output gear of the gears to the screw,
wherein the self-locking module comprises:
a first connector installed at a rear portion of the screw to rotate together with the screw;
a second connector installed at a center of the final output gear to rotate together with the final output gear; and
a torsion spring, one end thereof being connected to the first connector and another end thereof being connected to the second
connector to transfer the rotational power,

wherein the torsion spring elastically deforms according to a load from a time point at which the pad plates pressed by the
piston begins to contact the disc, to restrict rotation of the disc.

US Pat. No. 9,290,163

PEDAL FEELING ADJUSTING DEVICE

MANDO CORPORATION, Gyeon...

1. A pedal feeling adjusting device that adjusts pedal feeling provided to a driver by an oil pressure generated in accordance
with pedal effort of the driver, the pedal feeling adjusting device comprising:
a pedal simulator that includes a simulator block in which an oil hole connected to a master cylinder through a flow path
is formed on an upper portion thereof to receive the oil pressure in accordance with the pedal effort of the driver and bores
are formed therein to contact the oil hole, a damping housing coupled to seal the bores, first and second pistons provided
in series in the bores to be compressed by oil and slidably moved, and an elastic member supported by the damping housing
and compressed in accordance with movement of the first and second pistons to provide a reaction force;

a hydraulic flow path that is connected to the flow path connecting between the oil hole and the master cylinder to provide
the oil pressure between the first and second pistons; and

a control valve that is provided in the flow path to control the oil pressure to be selectively provided to the oil hole or
the hydraulic flow path,

wherein the first and second pistons are formed to have mutually different diameters.

US Pat. No. 9,447,835

DAMPING FORCE VARIABLE VALVE ASSEMBLY AND DAMPING FORCE VARIABLE SHOCK ABSORBER HAVING THE SAME

MANDO CORPORATION, Pyeon...

1. A damping force variable shock absorber for adjusting a damping force of the shock absorber, the shock absorber comprising:
a base shell in which a damping force variable valve assembly is attached to an outside of the base shell;
an inner tube which is installed inside the base shell and in which a piston rod is installed movably in a length direction;
a piston valve which is connected to one end of the piston rod such that an inner space of the inner tube is partitioned into
a rebound chamber and a compression chamber; and

a separator tube which partitions a space between the base shell and the inner tube into a low pressure chamber and a high
pressure chamber,

wherein the damping force variable valve assembly comprises:
a solenoid which generates a magnetic force when an electric current is applied thereto;
a spool which is movable by the magnetic force of the solenoid;
a spool guide which surrounds the spool to guide a movement of the spool;
a valve body which is installed in the spool guide;
a main valve which is installed in a main passage formed in the valve body, and generates a damping force;
a back pressure chamber which is provided to have a back pressure to pressurize the main valve from the rear of the main valve;
a chamber forming body which is installed outside the valve body to form the back pressure chamber; and
a low-speed control valve which is installed in a low-speed passage formed in the valve body, and generates a damping force,
wherein the damping force of the shock absorber is variable between a hard mode in which the back pressure of the back pressure
chamber is increased and a soft mode in which the back pressure of the back pressure chamber is decreased, when an inner passage
within the damping force variable valve assembly is changed by interaction of the spool and the spool guide,

wherein the main passage and the low-speed passage form separate passages so that the main valve and the low-speed control
valve are installed in parallel,

wherein in the soft mode, a working fluid supplied to the main valve does not pass through the low-speed control valve, and
a working fluid supplied to the low-speed control valve does not pass through the main valve, and the low-speed control valve
generates the damping force when a flow rate of a working fluid is low in the soft mode,

wherein the working fluid flows, from the high pressure chamber which is communicated with the rebound chamber and formed
between the inner tube and the separator tube, through the main passage and the main valve, or through the low-speed passage
and the low-speed control valve, directly to the low pressure chamber which is formed between the base shell and the separator
tube, based on the flow rate of the working fluid in the soft mode,

wherein the spool comprises alternating large-diameter portions and small-diameter portions,
wherein the spool guide includes an inlet port, a first inlet passage, a first passage and a second passage,
wherein the valve body includes a second inlet passage and third inlet passage,
wherein in the soft mode, when the flow rate of the working fluid is low,
the working fluid passing through the main passage including the inlet port, the first inlet passage, the second inlet passage,
and the third inlet passage flows toward the second passage through a slit formed on an inner peripheral side of disks included
in the main valve,

the working fluid passing through the second passage flows toward the first passage through a space between the spool guide
and a first small-diameter portion of the spool,

the working fluid passing through the first passage flows toward the low-speed passage,
the damping force is generated in a low flow rate section by the low-speed control valve, and
the working fluid passing through the low-speed passage flows toward the low pressure chamber.

US Pat. No. 9,228,862

STRUCTURE FOR ULTRASONIC TRANSDUCER

MANDO CORPORATION, Pyeon...

1. An ultrasonic transducer comprising:
a housing comprising a bottom surface and side members, the side members facing each other and extending upwardly with a space
part therebetween, the housing having an opened upper part; and

a housing auxiliary member disposed at upper portions of the side members and inserted into the space part,
wherein the housing auxiliary member is formed of material having a lower density than the housing.

US Pat. No. 9,205,861

ELECTRIC POWER STEERING APPARATUS FOR VEHICLE AND METHOD OF ASSEMBLING THE SAME

MANDO CORPORATION, Pyeon...

1. An electric power steering apparatus comprising:
a boss having a coupling hole formed at one end thereof and an insertion hole formed at the other end in a shape extending
in a spoke-like pattern in a radial direction from a center thereof, a driving shaft of a motor being inserted into the coupling
hole;

an elastic member having vanes extending in the spoke-like pattern in the radial direction from a center thereof to be inserted
into and engaged in the insertion hole, the elastic member being closed at one axial end and formed with a fastening hole
at the other axial end in a shape extending in a spoke-like pattern from the center thereof, and a radial length of the vanes
being set to be shorter than that of the portions extending in the spoke-like pattern in the insertion hole such that a first
predetermined clearance space is formed between each of the vanes and an inner wall of the insertion hole in the radial direction
at each of the portions extending in the spoke-like pattern in the insertion hole in the portions extending in the spoke-like
pattern in the insertion hole; and

a worm shaft having coupling portions at one end of an outer circumferential surface thereof, the coupling portions extending
in the spoke-like pattern in a radial direction to be inserted into and engaged in the fastening hole,

wherein the elastic member further includes a connection portion interconnecting adjacent vanes so that a second predetermined
clearance space is formed between the connection portion and an inner circumferential surface of the insertion hole.

US Pat. No. 9,205,837

PARKING OPERATION CONTROL APPARATUS AND CONTROL METHOD THEREOF

MANDO CORPORATION, Pyeon...

1. A parking operation control apparatus, comprising:
a first sensing unit configured to sense at least one current wheel speed of an automobile based on an operating mode of a
parking operation device of the automobile,

a first controller configured to receive the at least one current wheel speed sensed by the first sensing unit, to output
the at least one current wheel speed, to store a reference wheel-speed range corresponding to a preset reference front-wheel
speed range, and to store a preset reference rear-wheel speed range;

a second sensing unit configured to sense the at least one current wheel speed output from the first controller;
a first judgment unit configured to judge whether the at least one current wheel speed sensed by the first sensing unit deviates
from the reference wheel-speed range, or to judge whether the at least one current wheel speed sensed by the second sensing
unit is not yet output; and

a regulation unit configured to regulate the at least one current wheel speed to conform to the reference wheel-speed range
if the first judgment unit judges that the at least one current wheel speed deviates from the reference wheel-speed range
or that the at least one current wheel speed is not yet output,

wherein
the first sensing unit is configured to sense a current front-wheel speed and a current rear-wheel speed of the automobile
if the parking operation device is in a parking release mode, and

the first sensing unit is configured to sense the current front-wheel speed of the automobile if the parking operation device
is in a parking operation mode.

US Pat. No. 9,205,860

REDUCER OF ELECTRIC POWER AUXILIARY STEERING APPARATUS

MANDO CORPORATION, Pyeon...

1. A reducer of an electric power auxiliary steering apparatus, comprising:
a damping member comprising an inner race and an outer race, wherein the inner race is mounted on an outer peripheral surface
of a worm shaft bearing coupled to one end of a worm shaft engaged with a worm wheel, a motor shaft being coupled to the other
end of the worm shaft, and the outer race is connected with connection parts formed at one portion orienting toward the worm
wheel and an opposite portion thereto, respectively, of an outer peripheral surface of the inner race, provided around the
inner race, and supported on an inner surface of a gear housing; and

a bush member provided between the inner race and the outer race, and formed with through holes through which the connection
parts pass, respectively, in a direction toward the worm wheel and an opposite direction thereto.

US Pat. No. 9,050,962

MOUNTING STRUCTURE FOR BOOSTERS AND BOOSTER ASSEMBLY FOR VEHICLES HAVING THE SAME

MANDO CORPORATION, Pyeon...

1. A mounting structure for boosters to mount a booster provided with a casing formed by hermetically connecting a front cell
and a rear cell, comprising:
a front bolt passing through the front cell, the inside of the front bolt being hollow;
a tube having a cylindrical shape, the inside of which is hollow in the lengthwise direction, and provided with a front part
connected to the rear portion of the front bolt to surround the outer circumferential surface of the rear portion of the front
bolt and a rear part crossing the casing to pass through the rear cell; and

a sealing member provided between the tube and the front bolt.

US Pat. No. 9,221,516

HUB MOTOR STRUCTURE

MANDO CORPORATION, Gyeon...

1. A hub motor structure installed on a bicycle, the hub motor structure comprising:
a hollow shaft installed on a frame of the bicycle;
a housing rotatably installed on the hollow shaft, and connected to a wheel at an outer circumferential surface thereof through
spokes;

a cover rotatably installed on the hollow shaft while installed on the housing, and on which a driven sprocket connected to
a chain is provided to receive a pedaling force;

a motor disposed in the housing and generating a rotary force to drive the wheel;
a continuous variable transmission (CVT) disposed in the housing to selectively shift power supplied from the motor;
a power transmission unit configured to transmit a rotary force of the motor to the CVT; and
a gear unit configured to transmit a rotary force output from the CVT to the housing.

US Pat. No. 9,194,457

FREQUENCY-SENSITIVE SHOCK ABSORBER

MANDO CORPORATION, Pyeon...

1. A frequency-sensitive shock absorber, which includes a cylinder filled with a working fluid and a piston rod having one
end disposed inside the cylinder and the other end extending to the outside of the cylinder, the frequency-sensitive shock
absorber comprising:
a main piston valve assembly installed at one end of the piston rod, and configured to
operate in a state in which the inside of the cylinder is divided into a rebound chamber and a compression chamber, and
generate a damping force varying according to a moving speed; and
an auxiliary piston valve assembly configured to
move together with the main piston valve assembly, and
generate a damping force varying according to a frequency, wherein the auxiliary piston valve assembly includes:
a housing;
a spool unit configured to open or close a communication passage for communicating the rebound chamber with the compression
chamber while moving within the housing; and

upper and lower support members positioned inside the housing, the upper and lower support members being configured to support
the spool unit,

wherein the upper and lower support members have protrusions protruding toward the spool unit, respectively, and as the spool
unit moves, the communication passage is closed when the protrusions of the upper and lower support members contact the spool
unit,

wherein the spool unit includes a spool configured to move upward and downward within the housing and upper and lower disks
configured to support the spool disposed therebetween,

wherein the upper and lower disks have through-holes, and
wherein the through-holes are positioned outward of a position where the protrusions are contacted by the upper or lower disks,
so as to block the communication passage when the upper and lower disks contact the protrusions.

US Pat. No. 10,563,714

OVERSIZED BRAKE PISTON FOOTING

MANDO CORPORATION, Gyeon...

1. A piston configured for use in a disk brake system, the piston comprising:a body having an outside width perpendicular to a central axis;
a footing disposed at a distal end of the piston;
wherein the footing is configured to exert force on a brake pad during actuation of the disk brake system;
the footing having a face configured to contact the brake pad, the face having a length and a width, wherein the length is longer than the outside width of the body, and the length is greater than the width;
a core comprising an elongate structure disposed within the body, the core having a proximal and a distal end, the distal end being located proximate the distal end of the piston and attached to the footing; and
a core-body coupler, wherein core includes a core recess, the body includes a body recess and the core-body coupler is located in the core recess and the body recess.

US Pat. No. 9,216,759

STEERING APPARATUS FOR VEHICLE

MANDO CORPORATION, Pyeon...

1. A steering apparatus for a vehicle, the steering apparatus comprising:
a dust cap through which a steering shaft passes, one side thereof being coupled to a rack housing, the dust cap having a
coupling flange portion formed on an outer peripheral surface thereof;

an outer cover of which one side is coupled to the coupling flange portion of the dust cap;
an inner cover of which an inner peripheral surface is closely coupled to an other side of the outer cover and through which
the steering shaft passes; and

a clip member of which one side is coupled to a coupling support portion formed at an inner side of the inner cover and an
other side is coupled to an other side of dust cap.

US Pat. No. 9,527,523

POWER TRANSMISSION DEVICE OF ELECTRIC POWER STEERING APPARATUS

MANDO CORPORATION, Gyeon...

1. A power transmission device of an electric power steering apparatus, the power transmission device comprising:
a driving shaft of a motor having an accommodation part formed at a rotation center thereof;
a coupling member inserted into the accommodation part and having an axial through-hole formed therethrough; and
a gear shaft including a coupling part formed on one side thereof to be coupled to the axial through-hole, and a gear part
formed on the other side thereof,

wherein the accommodation part includes one or more axial recesses and axial ribs, which are formed on an inner circumferential
surface thereof, and the coupling member includes one or more recesses and ribs that are formed on an outer circumferential
surface thereof to correspond to the recesses and the ribs of the accommodation part,

wherein at least one of the ribs formed on the outer circumferential surface of the coupling member is elastically compressively
deformed and coupled with at least one of the ribs formed on the inner circumferential surface of the accommodation part,
and

wherein, among the ribs of the coupling member, a rib, which is elastically compressively deformed and coupled with the ribs
of the accommodation part, is formed to have a width narrower than a width of the accommodation part recesses such that a
space is formed.

US Pat. No. 9,522,660

HIGH PRESSURE ACCUMULATOR OF BRAKE SYSTEM

MANDO CORPORATION, Pyeon...

1. A high pressure accumulator of a brake system disposed on a modulator block to reduce pressure pulsation of brake oil pressed
by driving of a pump and pumped, the high pressure accumulator comprising:
a closing member that closes one end of a bore having one opened end and is in communication with an inport through which
the brake oil is introduced and an outport through which the brake oil is discharged; and

a damping housing that is installed in the bore and has a damping chamber formed therein in communication with the inport
and the outport,

wherein an orifice part is formed integrally with the damping housing in a portion in which the brake oil is discharged through
the outport, and

a damping member is installed in the damping housing and partitions the damping chamber into a plurality of damping chambers
so that the partitioned plurality of damping chambers is in communication with each other, and

the damping member comprises a body part having one opened side to partition the damping chamber into the plurality of damping
chambers and a connection hole formed in a bottom surface of the body part in communication with the adjacent damping chamber
partitioned by the body part, and

an inclined part is formed on the bottom surface of the body part so that the brake oil easily flows into the adjacent damping
chamber, and the connection hole is formed in distal ends of the inclined part,

wherein a plurality of damping members is provided, the plurality of damping member being stacked and disposed in series,
and

wherein the plurality of damping members has diameters at which they correspond to each other, and are installed in the damping
housing, and one end of one of the damping members is pressed in and coupled to the closing member.

US Pat. No. 9,522,665

ELECTRONIC BRAKE SYSTEM AND CONTROL METHOD THEREOF

MANDO CORPORATION, Gyeon...

1. An electronic brake system comprising:
a master cylinder including a piston to generate hydraulic pressure by applying pressure to brake oil;
an output rod configured to contact the piston;
an input rod configured to be moved forward by a driver's manipulation of a brake pedal, and arranged coaxially to the master
cylinder and spaced a predetermined isolation gap apart from the output rod contacting the piston of the master cylinder;

an electrically-driven booster including a motor, a ball screw to move the output rod, and a motion converting unit to move
the ball screw forward and backward by converting rotational movement of the motor into linear movement of the ball screw;
and

an electronic control unit to control operation of the motor based on the size of the isolation gap between the input rod
and the output rod,

wherein the electronic control unit stops backward-movement of the ball screw which is moving backward in an anti-lock brake
system (ABS) mode such that the output rod does not collide with the input rod.

US Pat. No. 9,346,447

SOLENOID VALVE FOR BRAKE SYSTEM

Mando Corporation, Pyeon...

1. A solenoid valve for a brake system, the solenoid valve comprising:
a magnet core that is provided in a cylindrical shape, is installed in a bore of a modulator block, and has a through-hole
opening in a lengthwise direction thereof and a radial direction passage communicating with the through-hole; an armature
that is installed at one end of the magnet core so as to be reciprocated; a valve seat that is provided at the other end of
the magnet core and has an orifice; a plunger that is inserted into the through-hole and performs a sliding motion by the
armature to open and close the orifice; a sleeve that is fixed to the bore while accommodating the armature and the magnet
core; and a return spring that is provided to apply an elastic restorative force to the plunger to open the orifice,

wherein a passage hole is provided in a spiral shape along the through-hole at an inner circumferential surface of the magnet
core to discharge air between the magnet core and the plunger and air between the magnet core and the armature.

US Pat. No. 9,347,508

ELECTRONIC DISC BRAKE

Mando Corporation, Pyeon...

1. An electronic disc brake including a carrier at which a pair of pad plates move forward and backward, and a caliper housing
slidably installed at the carrier and provided with a cylinder in which a piston moves forward and backward by hydraulic brake
pressure, the electronic disc brake comprising:
an adjuster installed in the piston to prevent the pair of pad plates from moving away from a disc and to maintain the pair
of pad plates at a certain distance from the disc;

a push rod installed in the cylinder and having a front portion screw-coupled to the adjuster and a rear portion formed with
a flange extending toward an inner circumferential surface of the cylinder;

a spindle unit coupled to the rear portion of the push rod to prevent rotation of the push rod and to apply pressure to the
push rod by converting rotational force of a motor into linear movement, a front portion of the spindle unit is in surface
contact with a rear portion of the adjuster;

a spring case having one end fixed to the cylinder and forming a predetermined accommodation space between the inner circumferential
surface of the cylinder and the push rod;

a low-pressure spring and a high-pressure spring arranged in parallel in the accommodation space of the spring case to apply
elastic force to the push rod; and

a support plate slidably installed in the cylinder and supporting one end of the high-pressure spring so that a gap is formed
between the low-pressure spring and the high-pressure spring in a longitudinal direction,

wherein the high-pressure spring extends further rearward to be outside the spring case.

US Pat. No. 9,522,657

APPARATUS AND METHOD FOR CONTROLLING ELECTRONIC PARKING BRAKE

MANDO CORPORATION, Gyeon...

1. An apparatus for controlling an electronic parking brake, the apparatus comprising:
a first detection unit that detects current wheel pulse counting signals when a vehicle rolls at a predetermined time interval
for a predetermined time period after a parking operation for parking is clamped;

a second detection unit that continuously receives the detected current wheel pulse counting signals at a predetermined time
interval for a next time period after the predetermined time period and detects the continuously-cumulated current wheel pulse
cumulative counting signals;

a determination unit that determines whether the detected current wheel pulse counting signals are predetermined target wheel
pulse counting signals or determines whether the detected current wheel pulse cumulative counting signals are predetermined
target wheel pulse cumulative counting signals;

a driving unit that drives the electronic parking brake so as to re-clamp the parking operation if it is determined that the
current wheel pulse counting signals are the target wheel pulse counting signals or the current wheel pulse cumulative counting
signals are the target wheel pulse cumulative counting signals; and

a controller that transmits a first detection instruction to the first detection unit, transmits a second detection instruction
to the second detection unit, transmits a determination instruction to the determination unit and transmits a driving instruction
to the driving unit.

US Pat. No. 9,469,334

REDUCER AND ELECTRIC POWER STEERING APPARATUS HAVING THE SAME

MANDO CORPORATION, Pyeon...

1. A reducer comprising:
an eccentric cam formed with a coupling hole in which one end of a hollow motor shaft of a motor is fitted;
a step gear including a large-diameter portion formed with first gear teeth on an outer circumferential surface of the step
gear, the eccentric cam being fitted in the large-diameter portion, and a small-diameter portion extending axially from the
large-diameter portion and formed with second gear teeth on an outer circumferential surface of the small-diameter portion,
the step gear having a central axis spaced apart from a central axis of the motor shaft by a predetermined distance;

a fixed ring gear fixedly supported on a lower inner circumferential surface of a housing of the motor, the fixed ring gear
being formed with third gear teeth around an inner circumferential surface of the fixed ring gear to be tooth-engaged with
the first gear teeth of the large-diameter portion and being provided to be coaxial to the central axis of the motor shaft;
and

a movable ring gear being formed with fourth gear teeth around an inner circumferential surface at one side of the movable
ring gear to be tooth-engaged with the second gear teeth of the small-diameter portion, wherein a terminal end of a driving
shaft, which extends through the eccentric cam from the driving shaft that penetrates the motor shaft and is connected with
a steering wheel, is coupled to a central portion of the movable ring gear, and a pinion shaft is coupled to the movable ring
gear on an opposite side of the movable ring gear.

US Pat. No. 9,238,498

SAFETY APPARATUS OF ELECTRIC BICYCLE AND SAFETY DRIVING METHOD THEREOF

MANDO CORPORATION, Gyeon...

1. A safety apparatus of an electric bicycle, comprising:
a folding lever configured to be rotatable for folding a foldable portion;
a first sensing portion to sense current rotation degree of the folding lever;
a second sensing portion to sense a current folded position of the foldable portion;
a control unit provided with at least one of current rotation information of the folding lever sensed by the first sensing
portion and current folded position information of the foldable portion, and comprising at least one of sensing range information
on a per rotation basis of the folding lever and sensing range information on a per position basis of the foldable portion
which are preset; and

a safety drive portion which, when the control unit determines that at least one of the current rotation information of the
folding lever and the current folded position information of the foldable portion is deviated from at least one of the sensing
range information on a per rotation basis and the sensing range information on a per position basis, turns off activation
of a motor depending upon control of the control unit.

US Pat. No. 9,651,386

APPARATUS AND METHOD FOR CALCULATING DISTANCE BETWEEN VEHICLES

MANDO CORPORATION, Pyeon...

1. An apparatus for calculating a distance between vehicles, the apparatus comprising:
a processor; and
a sensor,
wherein the processor is configured to receive position movement information of a subject vehicle and position movement information
of an object vehicle from a global positioning system and to calculate, using values sensed by the sensor, a distance between
the moved subject vehicle and the moved object vehicle based on a position movement distance of the subject vehicle and a
position movement distance of the object vehicle at a predetermined time as the sum of a vector when calculating the position
movement information of the subject vehicle and the position movement information of the object vehicle over time using a
dead reckoning formula comprising a yaw rate value at a previous time, a yaw rate value at a present time, a yaw rate value
at a time at which the vehicles have been moved, position coordinate values at a previous time, position coordinate values
at a time at which the vehicles have been moved, a position movement distance of the subject vehicle, a distance between the
subject vehicle and the object vehicle at a previous time, a position movement distance of the object vehicle, and a distance
between the moved subject vehicle and the moved object vehicle.

US Pat. No. 9,387,836

VARIABLE PEDAL FEELING ADJUSTMENT DEVICE

MANDO CORPORATION, Pyeon...

1. A variable pedal feeling adjustment device to adjust a stroke distance of a reaction piston provided in a pedal simulator
configured to provide pedal feeling for a driver, comprising:
the pedal simulator including a simulator block formed with an oil hole at an upper portion thereof and a bore therein, the
oil hole being connected to a master cylinder to receive hydraulic pressure caused by pedal effort of a driver and the bore
communicating with the oil hole, a first reaction unit and a second reaction unit arranged in series in the bore and configured
to be pressurized sequentially by pedal effort, and a damping housing configured to support the second reaction unit and installed
to a lower portion of the bore while being restricted in rotation; and

an actuator including a spindle screw-coupled to the damping housing and a motor connected to the spindle to supply rotational
force to the spindle independently of the hydraulic pressure caused by pedal effort of the driver,

wherein the damping housing is moved linearly and changed in position by forward and backward rotation of the spindle.

US Pat. No. 9,718,448

PEDAL SIMULATOR

MANDO CORPORATION, Gyeon...

1. A pedal simulator, which is connected with a master cylinder and configured to provide a sense of a pedal for a driver
by receiving hydraulic pressure according to pedal pressure of the driver, comprising:
a simulation chamber which has one end connected with the master cylinder and the other end provided in a simulator block
closed by a damping housing, and is configured to store oil;

a check valve which is pressurized by a piston, provided in the simulation chamber to be slideable, and is slid;
an orifice formed in the simulator block and configured to allow a flow of oil in the simulation chamber by the sliding check
valve; and

an accumulator configured to store oil discharged through the orifice,
wherein the check valve comprises a valve body configured to seal between the simulation chamber and the piston and slide
in the simulation chamber; and a ball member which closes a flow path formed to penetrate the valve body,

wherein the ball member is configured to block the flow path when pressure is generated in the simulation chamber.

US Pat. No. 9,555,827

MOTOR AND ELECTRIC POWER STEERING APPARATUS INCLUDING THE SAME

Mando Corporation, Pyeon...

1. An electric motor comprising:
a flange coupled to a housing and having a hole, through which a driving shaft of the electric motor passes;
a sealing member of which an outer peripheral surface is attached to and supported by the hole and through which the driving
shaft passes, such that a space between the driving shaft and the hole is blocked; and

a rib formed around the hole of the flange and protruding in an axial direction of the flange,
wherein the rib has a plurality of cutaway recesses grooved in the axial direction and spaced apart from each other in a circumferential
direction.

US Pat. No. 10,046,795

MOUNTING ASSEMBLY FOR VEHICLE

MANDO CORPORATION, Pyeon...

1. A mounting assembly for a vehicle for coupling, to a chassis, a housing in which a steering device is mounted, the mounting assembly comprising:a first bush configured to be coupled to a mounting hole that is formed in the housing, and configured to have a coupling groove formed therein;
a second bush configured to be provided between the housing and the chassis, and configured to have a through hole formed to lead to the coupling groove; and
a bolt configured to fix the housing to the chassis,
wherein the second bush is inserted into the bottom of the first bush to then be coupled, and the bolt is engaged with the coupling groove by passing through an assembly hole that is formed in the chassis and by passing the through hole,
wherein a first buffering member in a cylindrical shape is provided between the mounting hole and the first bush, and the first buffering member resiliently supports the housing and the first bush while being interposed therebetween, andwherein a first press-fitting portion is formed to be recessed inwards on the outer surface of the first bush, and a second press-fitting portion is formed to be extended inwards from the through hole into which the first press-fitting portion is inserted.

US Pat. No. 9,619,895

IMAGE PROCESSING METHOD OF VEHICLE CAMERA AND IMAGE PROCESSING APPARATUS USING THE SAME

MANDO CORPORATION, Pyeon...

1. An image processing apparatus of a vehicle camera, comprising:
a light source extraction unit configured to extract light sources from a first frame exposed to light sources during a first
time and to extract light sources generating motion blurs from a second frame exposed to the light sources during a second
time longer than the first time;

a target light source classification unit configured to classify a first target light source that belongs to the light sources
of the first frame and that does not move and a second target light source that belongs to the light sources of the second
frame and that does not move;

a motion determination unit configured to estimate a first location that is a central point of the first target light source
and a second location that is a central line comprising a central point of the second target light source, compare the first
location with the second location, determine whether or not a pitch motion of the vehicle has occurred, perform binarization
on an image of the first frame or the second frame, and extract coordinates of the center of gravity of pixels having a specific
value as the first location or the second location; and

a correction unit configured to correct an image of the vehicle camera based on a result of the comparison between the first
location and the second location.

US Pat. No. 9,534,653

PISTON ASSEMBLY FOR SHOCK ABSORBER

MANDO CORPORATION, Gyeon...

1. A piston assembly for a shock absorber, comprising:
a bypass passage formed along a vertical length direction of a piston rod in a small-diameter portion that is stepped in a
lower portion of the piston rod reciprocating within a cylinder;

a main piston connected to the small-diameter portion;
an orifice assembly coupled to the small-diameter portion and disposed under the main piston to form an orifice passage, which
communicates with the bypass passage;

a housing coupled to the small-diameter portion and disposed under the orifice assembly, a top of the housing having an opened
portion and the housing forming a pressure chamber; and

a sliding valve coupled to the orifice assembly and accommodated in the pressure chamber to generate a damping force by selectively
opening and closing the orifice passage while reciprocating through a high-frequency section and a low-frequency section,

wherein the orifice assembly includes:
a cylindrical body which is coupled to the small-diameter portion and through which the sliding valve slidingly reciprocates
over the low-frequency section and the high-frequency section;

at least one first orifice penetrating through an upper portion of the body such that the bypass passage is coupled to an
upper space of the pressure chamber, the pressure chamber being partitioned into the upper space and a lower space by the
sliding valve; and

at least one second orifice passing through a lower portion of the body and connecting the bypass passage to the lower space
of the housing.

US Pat. No. 9,531,306

ELECTRONIC STABILITY CONTROL SYSTEM, AND METHOD FOR DETECTING A FAULT OF MOTOR FREEWHEELING FET CIRCUIT

MANDO CORPORATION, Pyeon...

1. An electronic stability control system, comprising:
a motor unit configured to be connected to a hydraulic pump pumping a brake fluid discharged from a wheel cylinder and circulating
the brake fluid to the wheel cylinder again to operate the hydraulic pump depending on a PWM signal;

a pulse width modulator configured to generate a PWM signal for driving the motor unit depending on a predetermined control
signal;

a motor driver configured to include a motor switch for driving the motor unit depending on the PWM signal and a freewheeling
switch and a reverse protection switch for checking whether the motor unit is normally operated;

a power supply unit configured to supply power for an operation of the motor unit, the pulse width modulator, and the motor
driver; and

a controller configured to turn off all of the motor switch, the freewheeling switch, and the reverse protection switch, turn
off only the motor switch and the reverse protection switch, or turn off only the motor switch and the freewheeling switch,
apply a diagnostic current, and then detect a fault state of the freewheeling switch or the reverse protection switch, or
the freewheeling switch and the reverse protection switch by using a voltage detector.

US Pat. No. 9,346,444

BOOSTER ASSEMBLY FOR VEHICLE

Mando Corporation, Pyeon...

1. A booster assembly for a vehicle for generating high hydraulic pressure by a small force, using a pressure difference between
a suction pressure of an engine of the vehicle and atmospheric pressure, comprising:
a booster provided at an engine room partitioned from a passenger compartment by a partition plate, the booster comprising
a front cell and a rear cell, which are sealably coupled;

a master cylinder disposed outwardly of a front side of the front cell of the booster, the master cylinder converting force
generated from the booster into a hydraulic pressure; and

a fastening member to simultaneously mount the booster and the master cylinder to the vehicle,
wherein the fastening member comprises:
a tube extending through the booster while having a hollow structure extending in a longitudinal direction of the tube, the
tube having a front portion extending through a flange of the master cylinder;

a nut fastened to the front portion of the tube, to fasten the master cylinder to the booster; and
a through-bolt extending through the tube such that the through-bolt extends through the partition plate, to be mounted to
the front portion of the tube,

wherein the tube includes a non-circular coupler integrally formed at a rear portion thereof to prevent the tube from rotating
when the nut is fastened to the tube,

wherein the rear cell is provided with a hole, through which the tube extends, the hole having a shape mating with a shape
of the non-circular coupler,

wherein the tube is provided, at the rear portion thereof, with a plate extending in a radial direction around an outer circumferential
surface of the tube and contacting an inner surface of the rear cell, and

wherein the plate is formed, at a surface thereof facing the rear cell, with a seat, which is grooved in from a front surface
of the plate rearwards in the axial direction and has an outer diameter smaller than that of the plate such that an outer
edge of the plate is in surface contact with the partition plate, to receive and surround a sealing member having an O-ring
shape.

US Pat. No. 9,175,738

DISC BRAKE

MANDO CORPORATION, Gyeon...

1. A disc brake having a pair of pad plates installed to be movable forward and backward and a caliper housing which is slidably
installed and provided with a cylinder allowing a piston to be installed therein to be movable forward and backward by hydraulic
brake pressure, the disc brake comprising:
an adjuster installed in the piston to prevent the pad plates from moving away from a disc and to maintain the pad plates
a constant distance from the disc;

a push rod installed in the cylinder, a front portion thereof being screw-coupled to the adjuster and a rear portion thereof
being provided with a flange extending toward an inner circumferential surface of the cylinder;

an element coupled to the flange to prevent rotation of the push rod and to move along with the push rod and seated in a seating
groove provided at a rear wall of the cylinder;

a spring case having an end of one side thereof fixed to the cylinder and forming a predetermined accommodation space between
an inner circumferential surface of the cylinder and the push rod; and

an elastic member arranged in the accommodation space of the spring case to provide elastic force to the push rod and the
element, wherein the elastic member comprises:

a low-pressure spring is arranged in the spring case, one end thereof being supported on a surface of the other side of the
spring case and the other end thereof being supported by the flange to provide elastic force in a direction of movement of
the piston; and

a high-pressure spring is arranged in the spring case to be spaced a constant distance apart from the low-pressure spring,
one end thereof being supported on the surface of the other side of the spring case and the other end thereof being supported
by the element to provide elastic force in the direction of movement of the piston.

US Pat. No. 9,103,906

RADAR APPARATUS UTILIZING MULTIPLE TRANSMISSION CHANNELS

MANDO CORPORATION, Pyeon...

1. A radar apparatus comprising:
N transmission antennas;
a transmission circuit unit comprising N transmission RF ports;
N power dividers connected between the N transmission antennas and the N transmission RF ports;
a Power combiner connected to the N power dividers; and
a reception circuit unit connected to the power combiner and to one or more reception antenna,
wherein each of the power dividers inputs power outputted from the corresponding transmission RF port through an input point,
and divides the input power into a first power and a second power according to a predetermined power division ratio, thereby
outputting the first power to the corresponding transmission antenna through a first output point and outputting the second
power to the power combiner through a second output point, and

the power combiner combines the second powers outputted through the second output point of each of the power divider, and
inputs the combined second power to the reception circuit unit.

US Pat. No. 9,465,105

V2V COMMUNICATION-BASED VEHICLE IDENTIFICATION APPARATUS AND IDENTIFICATION METHOD THEREOF

Mando Corporation, Pyeon...

1. A V2V communication-based vehicle identification apparatus comprising:
a radar sensor unit sensing radar information corresponding to relative distances to object vehicles;
a GPS module unit generating GPS information from GPS satellites;
a V2V communication unit transmitting the generated GPS information to the object vehicles and receiving GPS information of
the object vehicles from the object vehicles through vehicle to vehicle (V2V) communication; and

a controller calculating probabilities that the GPS information of the object vehicles is located within reference areas,
which are determined based on the sensed radar information, and identifying one or more vehicles corresponding to the radar
information and the GPS information of the object vehicles based on the calculated probabilities,

wherein the controller selects at least one combination of which a probability value among the calculated probabilities is
larger than a reference value, and identifies one or more vehicles corresponding to the radar information and the GPS information
of the selected combination.

US Pat. No. 9,193,378

ELECTRIC POWER STEERING APPARATUS FOR VEHICLE

MANDO CORPORATION, Pyeon...

1. An electric power steering apparatus, comprising:
an electric motor supported on an inner peripheral surface of a housing, having a hollow shape, and including a sun gear mounted
on an outer peripheral surface of one end;

a planetary gear assembly which includes a plurality of first planetary gears internally engaged with a first ring gear fitted
in the housing, a plurality of second planetary gears connected to the plurality of first planetary gears by a connection
shaft respectively, and internally engaged with a second ring gear, and a carrier to which both ends of the connection shaft
are coupled and supported; and

a pinion shaft which extends through the motor shaft, and has one end thereof on an outer peripheral surface of which a pinion
gear is mounted to be engaged with a rack gear formed on a rack bar, and the other end thereof which is connected to the input
shaft by means of the torsion bar, the pinion shaft being connected to the second ring gear.

US Pat. No. 9,145,138

PARKING ASSIST APPARATUS AND METHOD

MANDO CORPORATION, Pyeon...

1. A parking assist apparatus for a vehicle, comprising:
a start sensor configured to sense a starting state of the vehicle;
a vehicle speed sensor configured to sense a speed of the vehicle;
a gear sensor configured to sense a gear state of the vehicle; and
a parking control unit configured to control driving-out of the vehicle when the starting state of the vehicle is changed
from an OFF state to an ON state, the speed of the vehicle is less than a reference speed, and the gear state is “Neutral”
or “Park” when a signal instructing automatic parking of the vehicle is received from a driver.

US Pat. No. 9,127,941

SYSTEM FOR MEASURING VEHICLE DISTANCE AND METHOD THEREOF

MANDO CORPORATION, Pyeon...

1. A vehicle distance measurement system, comprising:
an image reception unit that receives an image of surroundings including an image of a specific vehicle;
a database unit that stores light source information indicating positions of vehicle taillights corresponding to a first light
source and a second light source, and vehicle model data corresponding to the light source information;

a control unit that extracts the first and the second light source of the specific vehicle from the image received through
the image reception unit, extracts the light source information corresponding to the first light source and the second light
source from the database, and extracts the vehicle model data corresponding to the extracted light source information to recognize
a type of the specific vehicle; and

a distance measurement unit that measures a distance to the specific vehicle based on the type of the specific vehicle recognized
through the control unit wherein:

the vehicle model data includes tread information indicating a position in which a tire of the specific vehicle comes in contact
with a road surface, and

the distance measurement unit extracts the position of the specific vehicle based on the tread information and measures the
distance to the specific vehicle based on the extracted position of the specific vehicle.

US Pat. No. 9,085,321

UNPARKING CONTROL SYSTEM AND UNPARKING CONTROL METHOD USING THE SAME

MANDO CORPORATION, Pyeon...

1. An unparking control system, comprising:
a distance measurement unit configured to measure a front distance from a front object with reference to a vehicle and a rear
distance from a rear object with reference to the vehicle;

an electronic control steering device configured to adjust a steering angle and forward and backward movements of the vehicle;
and

an Electronic Control Unit (ECU) configured to decide an initial unparking direction according to the front distance, and
control the electronic control steering device to steer the vehicle with the initial unparking direction and the steering
angle,

wherein the ECU is configured to decide a forward direction to be the initial unparking direction when the front distance
exceeds a preset reference distance, and control the electronic control steering device to steer the vehicle to be unparked
by initial movement in the forward direction,

wherein the ECU is configured to decide a backward direction to be the initial unparking direction when the front distance
is equal to or below the preset reference distance, and control the electronic control steering device to steer the vehicle
to be unparked by initial movement in the backward direction.

US Pat. No. 9,216,792

CHAINLESS ELECTRIC BICYCLE

MANDO CORPORATION, Gyeon...

1. An electric bicycle comprising:
a battery;
a generator to generate voltage by operation of pedals; and
a pedal load adjustment unit to adjust pedal load applied to the pedals by controlling voltage generated from the generator
and used to charge the battery,

wherein the pedal load adjustment unit includes plural capacitors configured to be charged with the voltage generated from
the generator and plural switches configured to operate alternately so that the voltage generated from the generator is discharged
to the capacitors to charge the capacitors and the voltage stored in the capacitors is discharged to the battery to charge
the battery,

wherein the pedal load adjustment unit includes:
a rectifier to rectify AC voltage generated from the generator to DC voltage;
a first switch interposed between an output terminal of the rectifier and an input terminal of the battery;
a second switch interposed between an output terminal of the first switch and an input terminal of the battery;
a first capacitor interposed between a junction point of an output terminal of the rectifier and an input terminal of the
first switch and the ground;

a second capacitor interposed between a junction point of an output terminal of the first switch and an input terminal of
the second switch and the ground; and

a third capacitor interposed between a junction point of an output terminal of the second switch and an input terminal of
the battery and the ground.

US Pat. No. 9,657,802

ELECTRONICALLY CONTROLLED INTERNAL DAMPER

MANDO CORPORATION, Pyeon...

1. An electronically controlled internal damper comprising:
a spool rod which is formed to have a stepped shape in a lower end portion of a piston rod that reciprocates within a cylinder;
a valve unit including: a main piston which has a central portion through which the spool rod passes, and partitions the cylinder
into a cylinder upper chamber and a cylinder lower chamber, and in which a compression passage and a rebound passage are alternately
disposed; a compression retainer disposed above the main piston; a rebound retainer disposed under the main piston; a first
housing which is disposed above the compression retainer to form a first pilot chamber inside the first housing and has an
opened bottom surface; and a second housing which is disposed under the rebound retainer to form a second pilot chamber inside
the second housing and has an opened top surface;

a driven spool which reciprocates along a guide passage penetrating a central portion of the spool rod; and
a damping unit which is provided on an outer peripheral surface of the driven spool and the spool rod so as to allow a working
fluid to flow to the inside and outside of the spool rod through the guide passage during a compression stroke or a rebound
stroke, forms a first bypass passage in an upper portion of the damping unit during the compression stroke in a hard mode
or a soft mode, and forms a second bypass passage in a lower portion of the damping unit during the rebound stroke in the
hard mode or the soft mode,

wherein the damping unit includes: a communication assembly provided in the spool rod; and a guide assembly,
wherein the communication assembly includes:
a compression hard passage communicating with the first pilot chamber;
a first inlet passage formed under the compression hard passage and communicating with the first pilot chamber through a central
passage of the compression retainer;

a compression soft passage formed under the first inlet passage and communicating with a central portion of the main piston;
a rebound soft passage formed under the compression soft passage and communicating with the central portion of the main piston;
a second inlet passage formed under the rebound soft passage and communicating with the second pilot chamber through a central
passage of the rebound retainer; and

a rebound hard passage formed under the second inlet passage and communicating with the second pilot chamber, and
wherein the guide assembly includes:
a first large-diameter portion formed in an upper portion of the driven spool; and
a second large-diameter portion formed under the first large-diameter portion and having a compression soft guide groove which
is recessed downwardly at an upper edge of the second large-diameter portion.

US Pat. No. 9,441,691

ELECTRIC DISK BRAKE

MANDO CORPORATION, Gyeon...

1. An electric disk brake comprising:
a carrier in which a pair of pad plates for pressing both sides of a rotating disk are installed, wherein the pair of pad
plates are configured to advance and retreat with respect to the rotating disk;

a caliper housing that is slidably installed in the carrier and has a cylinder in which a piston is installed, wherein the
piston is configured to make the pair of pad plates advance and retreat due to brake hydraulic pressure;

an adjuster disposed in the piston;
a push rod that is installed in the cylinder and is screw-coupled to the adjuster;
a ramp unit that is installed to penetrate the rear of the cylinder, converts a rotation motion into a rectilinear motion
by receiving a rotation force from an actuator that generates a parking brake force, and presses the push rod toward the piston;

an elastic member that is disposed in a spring case formed between an inner circumferential surface of the cylinder and the
push rod and provides an elastic force to the push rod,

a connector having one end coupled to a rotating ramp plate of the ramp unit so that the connector is rotated together with
the rotating ramp plate, and having the other end connected to a final output gear among a plurality of gears configured to
decelerate a rotation force generated from the actuator so that the rotation force is transferred only in a direction in which
a brake force is generated in the rotating ramp plate,

wherein at least one hole is spaced by a predetermined distance apart from a center of the connector in a radial direction
and is formed in an arc shape, and

protrusions are formed in the final output gear to penetrate the at least one hole and to rotate, and
the connector comprises:
a first coupling part that penetrates a center of the final output gear and is coupled to the rotating ramp plate; and
a second coupling part, which extends from the first coupling part in a radial direction and in which the at least one hole
is formed in the radial direction of a center of the second coupling part.

US Pat. No. 10,040,438

ELECTRIC BRAKE SYSTEM

MANDO CORPORATION, Gyeon...

1. An electric brake system comprising:a hydraulic pressure supply device configured to generate hydraulic pressure using a piston which is operated by an electrical signal that is output corresponding to a displacement of a brake pedal, and including a first pressure chamber provided at one side of the piston movably accommodated inside a cylinder block and connected to one or more wheel cylinders, and a second pressure chamber provided at the other side of the piston and connected to the one or more wheel cylinders;
a first hydraulic flow path configured to communicate with the first pressure chamber;
a second hydraulic flow path configured to communicate with the first pressure chamber;
a third hydraulic flow path configured to communicate with the second pressure chamber;
a fourth hydraulic flow path branching from the third hydraulic flow path and connected to the first hydraulic flow path;
a fifth hydraulic flow path branching from the third hydraulic flow path and connected to the second hydraulic flow path;
a first hydraulic pressure circuit including first and second branching flow paths which branch from the first hydraulic flow path and are respectively connected to two wheel cylinders; and
a second hydraulic pressure circuit including third and fourth branching flow paths which branch from the second hydraulic flow path and are respectively connected to two wheel cylinders,
wherein the first pressure chamber comprises first and second communicating holes which are outlets, the first hydraulic flow path connects the first communicating hole of the first chamber to the first hydraulic pressure circuit, and the second hydraulic flow path connects the second communicating hole of the first chamber to the second hydraulic pressure circuit.

US Pat. No. 9,664,787

LANE ESTIMATION APPARATUS AND METHOD

MANDO CORPORATION, Pyeon...

1. A lane estimation apparatus comprising:
a camera unit which captures an image in front of a vehicle;
a radar unit which senses a plurality of stationary objects in front of the vehicle;
a lane estimation unit which detects a lane through the image captured by the camera unit, generates an imaginary lane joining
a plurality of stationary objects next to a road among the stationary objects sensed by the radar unit, determines whether
the generated imaginary lane is valid based on a distance between the detected lane and the generated imaginary lane, generates,
when the imaginary lane is valid according to the determined result, a final lane based on the detected lane and the imaginary
lane, and recognizes the generated final lane as a driving lane of the vehicle; and

a lane detection unit which detects a lane through the image captured by the camera unit;
an imaginary lane generation unit which generates an imaginary lane joining the plural stationary objects next to the road
among the stationary objects sensed by the radar unit;

an imaginary lane validity determination unit which compares similarity between the generated imaginary lane and the detected
lane with regard to at least one of lane areas divided into a short-distance area and a long-distance area based on a distance
between the vehicle and each of the plural stationary objects, and determines whether the generated imaginary lane is valid
according to the compared result;

a final lane generation unit which generates, when the imaginary lane is valid according to the determined result, a final
lane based on the detected lane and the imaginary lane; and

a lane recognition unit which recognizes the generated final lane as a driving lane of the vehicle.

US Pat. No. 9,162,620

METHOD AND APPARATUS OF DETERMINING POSITION OF OBSTACLE, AND PARKING ASSIST METHOD AND SYSTEM

MANDO CORPORATION, Pyeon...

1. An apparatus of determining a position of an obstacle, the apparatus comprising:
at least two sensors configured to transmit signals at different positions and receive reflected signals when the transmitting
signals are reflected from an obstacle;

an propagation distance calculation unit configured to calculate an propagation distance of a direct signal which is sent
from a first sensor which is one of the at least two sensors and received by the first sensor, and an propagation distance
of an indirect signal which is sent from a second sensor which is different from the first sensor among the two more sensors
and received by the first sensor; and

a position determining unit configured to determine a position of the obstacle by comparing the propagation distance of the
direct signal and the propagation distance of the indirect signal, based on a result calculated by the propagation distance
calculation unit.

US Pat. No. 9,145,934

DECELERATOR AND MOTOR BRAKE WITH THE SAME

MANDO CORPORATION, Pyeon...

1. A decelerator comprising:
a first deceleration unit comprising a sun gear provided to rotate coaxially with an input shaft, a plurality of planet gears
provided around the sun gear to revolve around the sun gear while rotating on their axes during rotation of the sun gear,
and a ring gear fixed in a state in which the ring gear is circumscribed about the planet gears to guide revolution of the
planet gears;

a carrier mounted around the first deceleration unit to be eccentrically rotated according to the revolution of the planet
gears; and

a second deceleration unit comprising an inner gear disposed around the carrier to be eccentrically rotated together with
the carrier, the inner gear having cycloid teeth formed at an outer circumference of the inner gear and a plurality of through
holes provided between an inner circumference and the outer circumference of the inner gear in a circumferential direction,
an outer gear provided outside the inner gear so that the outer gear is provided with teeth corresponding to the cycloid teeth
at an inner circumference of the outer gear, and an output member provided with a plurality of protrusions arranged in a circumferential
direction along an edge of the output member at one side to be inserted into the through holes, each of the protrusions having
a smaller diameter than each of the through holes, and provided with an output shaft at a center of the output member at another
side,

wherein the carrier comprises a ring provided to surround an outer circumference of the ring gear and a plate to close one
end of the ring, the carrier having a cup shape to receive the first deceleration unit therein,

the ring has an inner circumferential center being eccentric with respect to an outer circumferential center of the ring,
and

the planet gears have shafts which are fixed to the plate.

US Pat. No. 9,120,467

ELECTRO-HYDRAULIC BRAKE AND CONTROL METHOD THEREOF

MANDO CORPORATION, Pyeon...

1. An electro-hydraulic brake comprising:
a master cylinder having two hydraulic circuits and generating hydraulic pressure;
a housing including a booster chamber contacting the master cylinder to compress the master cylinder, and a base chamber including
a piston moving by foot effort of a driver and generating pressure based on displacement of the piston due to the foot effort;

an oil reservoir connected to the upper portion of the master cylinder to store oil;
a hydraulic control unit connected to the oil reservoir to generate hydraulic pressure;
a simulation unit to provide reaction force of the pedal; and
a pedal displacement sensor to sense displacement of the pedal,
wherein the hydraulic control unit includes an accumulator to store a designated level of pressure to supply the pressure
to the booster chamber, a pump to absorb the oil from the oil reservoir and to discharge the oil to the accumulator to form
pressure in the accumulator, a motor to drive the pump, a normal cut valve to control connection between the base chamber
and the booster chamber, a simulation control valve to control connection between the base chamber and the simulation unit,
two control valves to control the pressure in the booster chamber, pressure sensors to sense the pressures in the base chamber,
the accumulator and the booster chamber, and a controller to control the motor and the valves based on pressure information
and pedal displacement information, and

wherein the pressure sensors include a first pressure sensor to measure the pressure in the base chamber, a second pressure
sensor to measure the pressure in the accumulator, and a third pressure sensor to measure the pressure in the booster chamber.

US Pat. No. 9,834,212

APPARATUS AND METHOD FOR CONTROLLING VEHICLE USING VEHICLE COMMUNICATION

MANDO CORPORATION, Gyeon...

1. An apparatus for controlling a subject vehicle, the apparatus comprising:
a communication unit included in the subject vehicle and receiving, from an object vehicle, object vehicle surrounding information
including lane information from a viewpoint of the object vehicle, through wireless communication;

a measurement unit measuring vehicle information of the subject vehicle;
an object vehicle detection unit detecting a location and a speed of the object vehicle, using the object vehicle surrounding
information received from the object vehicle through the wireless communication and the vehicle information of the subject
vehicle; and

a vehicle control unit controlling an operation of the subject vehicle using information on the location and the speed of
the object vehicle,

wherein the lane information from the viewpoint of the object vehicle corresponds to one or more parameters including a coefficient
of an equation indicating a linear shape of a lane in an orthogonal coordinate system in which a location of the object vehicle
is configured to be an original point and a heading direction of the object vehicle is configured to be an orthogonal axis.

US Pat. No. 9,371,901

PULLEY STRUCTURE OF BELT TYPE ELECTRIC POWER STEERING GEAR

MANDO CORPORATION, Pyeon...

1. A pulley structure for a belt type electric power steering (EPS) gear of a vehicle, the pulley structure comprising:
insert ring sections coupled to a ball nut;
a support section configured to support the insert ring sections;
a first flange section configured to prevent separation of a belt;
a pulley configured to be used in the belt type EPS gear, the pulley having a driving section configured to receive a driving
force of the belt;

a support frame disposed at one side surface of the driving section and having a shape bent to provide an internal space when
coupled to the ball nut; and

a second flange section disposed at one side surface of the support frame and configured to prevent separation of the belt,
wherein the insert ring sections, the support section, the first flange section and the pulley are integrally formed with
each other.

US Pat. No. 9,347,511

CONTINUOUS DAMPING CONTROL SHOCK ABSORBER OF DUAL SOLENOID VALVE STRUCTURE

MANDO CORPORATION, Pyeon...

1. A continuous damping control shock absorber of a dual solenoid valve structure having a rebound solenoid valve and a compression
solenoid valve, the continuous damping control shock absorber comprising:
a separator tube for interworking prevention, which is installed to form a connection chamber at a position where a rebound
separator tube and a compression separator tube are connected, thereby preventing interworking of the rebound solenoid valve
and the compression solenoid valve; and

a communication hole which is formed in a cylindrical side surface of the compression separator tube to communicate with the
connection chamber.

US Pat. No. 9,221,444

BRAKE SYSTEM HAVING DRAG REDUCTION FUNCTION AND METHOD OF CONTROLLING THE SAME

MANDO CORPORATION, Gyeon...

1. A brake system to perform braking to decelerate or stop a vehicle, the brake system comprising:
a pressurizing cylinder connected to a reserve tank adapted to store a fluid;
a motor to move a pressurizing piston forward in the pressurizing cylinder; and
a braking control unit to receive state information about the vehicle to determine whether the vehicle is braking or traveling,
execute, when the vehicle is traveling, a negative pressure creation mode of driving the motor to move the pressurizing piston
forward to create a negative pressure, and execute, when creation of the negative pressure is completed, a negative pressure
maintaining mode of maintaining the negative pressure.

US Pat. No. 9,802,455

ELECTRONIC CONTROL SUSPENSION APPARATUS AND DAMPING FORCE CONTROLLING METHOD THEREOF

MANDO CORPORATION, Pyeon...

1. An electronic control suspension apparatus for controlling a damping force of a damper installed at each of a front wheel
and a rear wheel, the electronic control suspension apparatus comprising:
a reception unit configured to receive a vehicle manipulation signal;
a driver tendency analysis unit configured to calculate a driver tendency analysis value by analyzing a driver's driving tendency
based on the vehicle manipulation signal received by the reception unit;

a driver mode determination unit configured to determine a driver mode to which the driver tendency analysis value calculated
by the driver tendency analysis unit belongs; and

a damping force control unit configured to control the damping force of the damper by changing a current value to be applied
to a solenoid valve according to the determined driver mode.

US Pat. No. 9,555,826

SAFETY APPARATUS FOR STEER-BY-WIRE

MANDO CORPORATION, Pyeon...

1. A safety apparatus for a steer-by-wire comprising:
a first rotating plate formed on an end portion of any one of an input shaft and an output shaft that are separated from each
other, wherein the first rotating plate has a through hole formed at a position spaced apart from the center thereof and is
provided with a first position detecting sensor;

a second rotating plate formed on an end portion of the other of the input shaft and the output shaft to face the first rotating
plate, wherein the second rotating plate has an actuator coupled thereto and is provided with a second position detecting
sensor interacting with the first position detecting sensor, and the actuator comprises a load part that is inserted into
or extracted from the through hole; and

a controller that receives a signal for a relative rotation angle between the first and second rotating plates from the first
and second position detecting sensors and controls the actuator to extract the load part from the through hole when the steer-by-wire
is operating normally and to insert the load part into the through hole when the steer-by-wire malfunctions, wherein a plurality
of through holes are formed along the circumferential direction of the first rotating plate, and, wherein the plurality of
through holes are formed in such a manner that the adjacent ones overlap each other.

US Pat. No. 9,849,877

APPARATUS AND METHOD FOR CONTROLLING VEHICLE

MANDO CORPORATION, Pyeon...

1. A method for controlling a vehicle by monitoring a driver's state, the method comprising:
setting a first steering control region, a first steering warning region, a braking control region, and a first braking warning
region of the vehicle;

determining the driver's state by monitoring a state of a driver; and
if the determined driver's state is in an abnormal state, resetting the first steering control region, the first steering
warning region, and the first braking warning region of the vehicle, to set a second steering control region, a second steering
warning region, and a second braking warning region,

wherein
the braking control region, the first braking warning region, and the second braking warning region are formed on the basis
of a distance to a front vehicle,

a distance of the first braking warning region is shorter than a distance of the second braking warning region, and
a distance of the braking control region is shorter than a distance of the first braking warning region, and
wherein
the first braking warning region includes a first plurality of sections according to respective distances, and
the second braking warning region includes a second plurality of sections according to respective distances in response to
the first braking warning region composed of the first plurality of sections.

US Pat. No. 9,592,798

BRAKING SYSTEM AND BRAKING CONTROL METHOD IN PARKING

MANDO CORPORATION, Gyeon...

1. A brake system comprising:
a main brake applying braking force to a wheel of a vehicle when the vehicle travels;
a parking brake applying braking force to the wheel of the vehicle when the vehicle is parked; and
a parking brake controller configured to operate the main brake when the parked vehicle is sensed to move above a predetermined
reference value and stop the operation of the main brake after increasing locking force of the parking brake when the movement
of the vehicle is stopped according to the operation of the main brake,

wherein the parking brake controller is configured to determine an inclination of the parked vehicle; warn, when the inclination
exceeds a predetermined reference value, a driver about the same; and receive an instruction to stop the operation of the
main brake from a driver or stopping the operation of the main brake after elapse of a predetermined reference time after
the warning.

US Pat. No. 9,274,527

PARKING CONTROL APPARATUS AND PARKING CONTROL METHOD

Mando Corporation, Pyeon...

1. A parking control apparatus comprising:
a first unit including a first sensor, the first unit configured to set an initial parking space by receiving an input of
information for at least one obstacle positioned around a moving vehicle from the first sensor to search a parking space,
configured to calculate a first parking route using information for the initial parking space, and configured to control the
vehicle to move along the first parking route; and

a second unit including a second sensor, the second unit configured to determine whether to correct the initial parking space
based on a parking space searching speed of the vehicle, configured to correct the initial parking space based on the information
for the at least one obstacle recognized in a space recognition correction section to set a final parking space when it is
determined that the vehicle exists in the space recognition correction section and the parking space searching speed exceeds
a reference speed, and configured to control the vehicle to change a position thereof and to calculate a final parking route
on information for the final parking space and information for the changed position of the vehicle, a route correction control
section being set to extend by a predetermined distance from an end point of the space recognition correction section when
it is determined that the vehicle enters the route correction control section,

wherein the space recognition correction section is a section where, among obstacles positioned on opposite sides of the initial
parking space, an obstacle positioned closer to the vehicle is recognized through the second sensor while the vehicle moves
along the first parking route.

US Pat. No. 9,200,693

PISTON VALVE ASSEMBLY FOR SHOCK ABSORBER

MANDO CORPORATION, Pyeon...

1. A piston valve assembly for a shock absorber, comprising:
a piston rod reciprocating within a cylinder;
a main piston mounted on the piston rod and partitioning the cylinder into an upper chamber and a lower chamber, wherein a
plurality of compression passages and a plurality of rebound passages penetrate the main piston in a vertical direction;

a compression valve mounted on the piston rod and disposed under the main piston, wherein the compression valve forms a first
compression chamber on a bottom surface, the first compression chamber having a ring shape around the piston rod toward the
lower chamber;

a lower retainer mounted on the piston rod and disposed under the compression valve, wherein a top surface of the lower retainer
is opened toward the upper chamber;

a plurality of bypass passages formed on an outer peripheral surface of the piston rod from an upper side of the main piston
to an upper side of the lower retainer along a vertical length direction;

a guide assembly mounted on the piston rod and disposed between the compression valve and the lower retainer, wherein the
guide assembly surrounds an outer peripheral surface of the compression valve and the bottom surface of the compression valve,
tightly contacts the bottom surface of the compression valve in a high-frequency section, and moves down toward the lower
retainer in a low-frequency section; and

a lower disk assembly mounted on the piston rod and disposed between the guide assembly and the lower retainer, wherein the
lower disk assembly forms a second compression chamber in the lower retainer while covering the opened top surface of the
lower retainer, communicates the second compression chamber with the lower chamber in the high-frequency section, and blocks
the communication between the second compression chamber and the lower chamber in the low-frequency section due to the downward
movement of the guide assembly.

US Pat. No. 9,123,253

PARKING ASSISTANCE APPARATUS AND PARKING ASSISTANCE METHOD THEREOF

MANDO CORPORATION, Gyeon...

1. A parking assistance apparatus comprising:
a sensing unit sensing at least one of a forward access distance and a backward access distance to a current surrounding object
according to forward driving and backward driving of a vehicle during parking of the vehicle;

a controller performing an electronic parking brake operation using an electronic parking brake driving apparatus during parking
of the vehicle and including predetermined forward access distance range and backward access distance range to a reference
surrounding object;

a first judgment unit judging whether or not at least one of the forward access distance and the backward access distance
to the current surrounding object, sensed by the sensing unit, deviates from at least one of the forward access distance range
and the backward access distance range to the reference surrounding object under control of the controller;

a display unit displaying the at least one access distance and the at least one access distance range, if the first judgment
unit judges that the at least one of the forward access distance and the backward access distance to the current surrounding
object deviates from the at least one of the forward access distance range and the backward access distance range to the reference
surrounding object; and

a steering driving unit driving an electronic steering driving apparatus under control of the controller until the at least
one access distance enters the at least one access distance range, based on the at least one access distance and the at least
one access distance range, displayed on the display unit.

US Pat. No. 10,000,193

INTEGRATED DYNAMIC BRAKE APPARATUS

MANDO CORPORATION, Pyeon...

1. An integrated dynamic brake apparatus comprising a hydraulic pressure generating unit configured to convert rotational power of a motor into linear reciprocating movement;a brake actuation unit including a master cylinder disposed separately at one side of a pump piston included in the hydraulic pressure generating unit;
a valve block disposed over the motor and configured to control discharging of a fluid accommodated in the master cylinder; and
an electronic control unit disposed at one side of the motor and configured to control the motor and the valve block,
wherein the pump piston linearly reciprocates along a first axis perpendicular to an axis of rotation of the motor,
wherein the hydraulic pressure generating unit comprises:
a rack bar engaged with a pinion and configured to linearly move in a first axis direction based on rotation of the pinion, the pump piston being connected to one side of the rack bar, and
wherein a protrusion is formed at one side of the rack bar,
an insertion groove is formed in the pump piston at a position corresponding to the protrusion, and
the protrusion is inserted into the insertion groove to couple the rack bar and the pump piston.

US Pat. No. 9,422,000

METHOD FOR PROVIDING TORQUE RELIABILITY AND CONTROL APPARATUS

MANDO CORPORATION, Pyeon...

1. A control apparatus comprising:
a signal input unit configured to receive first signals, which are input from two or more torque output elements, the first
signals including at least one of information for an input shaft angle and an output shaft angle and first torque information
calculated based on the input shaft angle and output shaft angle, and to receive a second signal which includes steering angle
information and motor position information for a motor which are input from a steering angle output element and a motor position
output element;

a torque calculation unit configured to calculate a second torque based on the llinputll second signal;
an error determination module configured to determine whether an error situation of the two or more torque output elements
has occurred or not based on the first signals input from the two or more torque output elements; and

a steering torque determination unit configured to determine a driver's steering torque information based on the first signals
or the second torque depending on whether the error situation has occurred or not in the two or more torque output elements.

US Pat. No. 9,174,533

DRIVE STRUCTURE FOR ELECTRIC BICYCLE

MANDO CORPORATION, Pyeon...

1. A motor structure of an electric bicycle, the motor structure comprising:
a motor provided with a rotor and a stator to generate a rotary force to drive a wheel of the electric bicycle, the rotor
having a portion encircling an accommodation space defined therewithin;

a first decelerator unit disposed in the accommodation space to be radially enclosed by the encircling portion of the rotor
and connected to a rotating shaft that is rotated together with the rotor;

a second decelerator unit connected to the first decelerator unit and disposed outside the motor; and
a motor housing to accommodate the motor and the second decelerator unit,
wherein the first decelerator unit comprises:
a first sun gear installed on the rotating shaft;
a plurality of first planet gears disposed around the first sun gear while being engaged with the first sun gear;
a first carrier connected to a first center shaft of each of the plurality of first planet gears to output a rotary force;
and

a first ring gear fixed while being circumscribed on peripheries of the plurality of first planet gears.

US Pat. No. 9,163,684

DISC BRAKE

MANDO CORPORATION, Pyeon...

1. A disc brake comprising a carrier on which a pair of pad plates are movably installed and a caliper housing, which is slidably
installed on the carrier and is provided with a cylinder having a piston mounted so as to move forward and backward by a hydraulic
braking pressure, the disc brake comprising:
an adjuster installed in the piston to prevent the pad plates from moving away from a disc and to maintain the pad plates
at a constant distance from the disc;

a push rod installed in the cylinder, a front portion thereof being screw-coupled to the adjuster and a rear portion thereof
being provided with a flange extending toward an inner circumferential surface of the cylinder;

a ramp unit into which the rear portion of the push rod is inserted and which is installed in the cylinder and compresses
the push rod toward the piston in cooperation with a parking cable to prevent rotation of the push rod;

a spring case having an end portion of one side thereof fixed to the cylinder and forming a predetermined accommodation space
between the inner circumferential surface of the cylinder and the push rod;

a first elastic member and a second elastic member arranged in series with each other in the accommodation space of the spring
case to provide elastic force to the push rod; and

a support plate supported by an end portion of the ramp unit and interposed between the first elastic member and the second
elastic member.

US Pat. No. 9,103,402

SHOCK ABSORBER

MANDO CORPORATION, Pyeon...

1. A shock absorber comprising:
a first piston including a first compression chamber that is connected to an end of the piston rod reciprocating within a
cylinder and is formed by a plurality of rebound passages penetrating in a vertical direction, the first piston having an
opened lower portion to form an inner space recessed upward;

a pilot valve connected to the piston rod and disposed in the inner space to selectively open a lower end of the rebound passage;
a second piston forming a second compression chamber that is connected to the piston rod, has an upper portion accommodated
in the inner space, and is disposed under the first piston, wherein connection rebound passages respectively connected to
the rebound passages penetrate the second compression chamber in a vertical direction, and the second compression chamber
has an opened upper portion to communicate with the inner space;

a rebound retainer including a fourth compression chamber that is connected to the piston rod, is disposed under the second
piston, and is formed by extension rebound passages respectively connected to the connection rebound passages;

a disk valve assembly connected to the piston rod, disposed under the rebound retainer, and opening and closing a passage
while allowing a deformation through communication with the extension rebound passages; and

a third compression chamber formed by a space between an inner peripheral surface of the first piston forming the inner space
and an outer peripheral surface of the second piston, together with a plurality of compression passages penetrating in a vertical
direction of the first piston.

US Pat. No. 10,137,891

DRIVING ASSISTANCE APPARATUS AND DRIVING ASSISTANCE METHOD

MANDO CORPORATION, Pyeon...

1. A driving assistance apparatus comprising:a first sensing unit configured to sense a width of a forward object, a distance to the forward object, a speed of the forward object, and a speed of an own vehicle;
a first determining unit configured to determine a risk of collision with the forward object based on the distance to the forward object, the speed of the forward object, and the speed of the own vehicle;
a second sensing unit configured to, when the first determining unit determines that there is a risk of collision, sense a first distance, which is a distance to a first corner of the forward object, and a second distance, which is a distance to a second corner of the forward object;
a calculating unit configured to calculate a distorted angle of the forward object based on the width of the forward object, the first distance, and the second distance;
a second determining unit configured to, when the calculated distorted angle is equal to or larger than a preset critical angle, further determine the risk of collision based on a smaller one of the sensed first and second distances, the speed of the forward object, and the speed of the own vehicle; and
a control unit configured to, when the second determining unit determines that there is the risk of collision, control at least one of the notification device, the braking device, and the steering device.

US Pat. No. 9,290,168

FIXING STRUCTURE FOR REINFORCEMENT PLATE AND TIE ROD-TYPE BRAKE BOOSTER HAVING THE SAME

MANDO CORPORATION, Gyeon...

1. A tie rod-type brake booster to produce a large braking force using a small force, comprising:
a casing provided with a front cell and a rear cell, the front cell and the rear cell sealingly joining to each other;
a tie rod caulked to the rear cell through the casing;
a reinforcement plate to closely contact an inner surface of the front cell to enhance rigidity of the casing, the reinforcement
plate being provided with a through hole penetrated by the tie rod; and

a support member formed at a penetration portion of the front cell penetrated by the tie rod to fix the reinforcement plate,
wherein the support member is provided with a bent portion bent from the penetration portion of the front cell, and a pressing
portion perpendicularly extending from the bent portion with respect to an axial direction of the tie rod, and

wherein the pressing portion presses a front surface of the front cell through a penetration portion of the front cell penetrated
by the tie rod.

US Pat. No. 9,923,421

ROTOR STRUCTURE FOR MOTOR

MANDO CORPORATION, Gyeon...

1. A rotor structure for a motor, comprising:
a core body in which a shaft passes through an axial center and teeth are radially arranged along an outer circumference and
include first slide connection portions at front ends;

field windings individually wound around outer circumferences of the teeth and maintaining a state of being spaced apart from
one another while being wound around the teeth; and

a cylindrical core tip part configured to surround the outside of the core body, the cylindrical core tip part including second
slide connection portions in an inner circumference such that the front ends of the teeth are slidably connected thereto along
an axial direction through a mating engagement,

wherein the core tip part comprises through-holes formed along an axial direction of the core tip part and concave grooves
formed in an inner circumferential surface of the core tip part having a length along an axial direction at positions of the
through-holes.

US Pat. No. 9,181,997

CALIPER BRAKE

Mando Corporation, Pyeon...

1. A caliper brake comprising:
a caliper housing that constitutes an exterior of the caliper brake and has one end on which a fork is formed and is bent;
a brake cylinder that is mounted on a side of the caliper housing to face the fork and generates a brake force inside the
brake cylinder using an oil pressure of a damping oil transmitted from a brake line;

a piston that is mounted within the brake cylinder and pressurizes a brake disc between the piston and the fork using the
brake force generated in the brake cylinder during braking;

a pressurization rod part that is mounted within the piston on a common axis, extends in an axial direction when abrasion
occurs in the fork and a frictional pad of the piston and increases a distance at which the piston pressurizes the brake disc
and moves, to compensate for abrasion; and

a return spring part that is disposed within the brake cylinder on the common axis to the pressurization rod part, is elastically
compressed during brake, is elastically restored when brake is released such that the abrasion compensation rod part is returned
to its original position before brake,

wherein the return spring part includes:
at least one return spring allowing the piston to return to its original position when the oil pressure is released; and
a spring cage housing the at least one return spring engaged with the pressurization rod part in a rotating manner by an “L”
shape hanging hook formed therein.

US Pat. No. 9,085,318

ELECTRIC POWER STEERING APPARATUS, MALFUNCTION JUDGING METHOD, AND CURRENT ESTIMATING METHOD

MANDO CORPORATION, Gyeon...

1. An electric power steering apparatus comprising:
a torque sensor configured to detect a torque applied to a steering wheel;
a current detector configured to measure a current flowing through a driving motor; and
an electronic control unit configured to estimate a current flowing through the driving motor based on the detected torque
and compare the estimated current with the measured current to determined a malfunction of the torque sensor or the current
detector,

wherein the electronic control unit calculates the current flowing through the driving motor by receiving a detected torque
value from the torque sensor, by determining an angular speed of the steering wheel based on the detected torque value, by
calculating an angular speed of the driving motor based on the angular speed of the steering wheel and a gear ratio of a reducer,
and by estimating the current flowing through the driving motor based on a voltage across the driving motor, a back EMF constant
of the driving motor, a resistance of the driving motor, and an angular speed of the driving motor.

US Pat. No. 9,981,642

ELECTRIC BRAKE SYSTEM AND METHOD THEREOF

MANDO CORPORATION, Gyeon...

1. An electronic brake system including a motor configured to drive a pump for pumping brake oil from a reservoir of a master cylinder, an accumulator configured to store the pumped brake oil according to operation of the pump driven by the motor, a first hydraulic circuit configured to control a hydraulic pressure generated by the accumulator to be transmitted to at least one first wheel, and a second hydraulic circuit configured to control the hydraulic pressure generated by the accumulator to be transmitted to at least one second wheel, the electronic brake system comprising:a pressure sensor including a first pressure sensor configured to measure a hydraulic pressure of the accumulator, a second pressure sensor configured to measure a hydraulic pressure of the first hydraulic circuit, and a third pressure sensor configured to measure a hydraulic pressure of the second hydraulic circuit;
a driver including one or more apply valves and release valves configured to control the hydraulic pressures of the first hydraulic circuit and the second hydraulic circuit;
a determiner configured to determine that at least one of the first hydraulic circuit and the second hydraulic circuit has failed when an absolute value of a slope of the pressure measured by the first pressure sensor is greater than a preset first threshold value and the pressure measured by the first pressure sensor is less than a preset second threshold value; and
a controller configured to close apply valves of the first hydraulic circuit and the second hydraulic circuit when the failure has been determined, determine that a leak has occurred in one of the first and second hydraulic circuits having an amount of pressure change greater than that of the other hydraulic circuit measured on the basis of the second pressure sensor and the third pressure sensor, and control braking using only the hydraulic circuit operating normally.

US Pat. No. 9,896,129

DRIVING ASSISTANT SYSTEM OF VEHICLE AND METHOD FOR CONTROLLING THE SAME

MANDO CORPORATION, Pyeon...

1. A driving assistant system of a vehicle comprising:
an image acquisition unit configured to acquire a front image of the vehicle and provide an acquired image;
an obstacle detection unit configured to detect an obstacle at lateral and rear sides of the vehicle and provide obstacle
information;

a warning unit configured to provide warning signal to a driver
a determination unit configured to
receive the acquired image from the image acquisition unit and the obstacle information from the obstacle detection unit,
determine whether the vehicle is located at a junction road based on the acquired image; and
a controller configured to,
when the vehicle is located at the junction road and the obstacle is not detected at the lateral or rear side of the vehicle,
automatically change a lane of the vehicle by performing a longitudinal and lateral automatic control including accelerating,
decelerating, and lane-keeping control of the vehicle, and

when the vehicle is located at the junction road and the obstacle is detected at the lateral or rear side of the vehicle,
warn the driver through the warning unit and release the longitudinal and lateral automatic control of the vehicle.

US Pat. No. 9,193,342

ELECTRONIC CONTROL BRAKE SYSTEM FOR VEHICLES

MANDO CORPORATION, Gyeon...

1. An electronic control brake system for vehicles comprising a master cylinder forming brake hydraulic pressure according
to operation of a brake pedal, wheel brakes, each of which includes a caliper device including a disc provided in a vehicle
and advancing and retracting a pair of pads pressing the disc so as to exhibit braking force by the brake hydraulic pressure
transmitted from the master cylinder, plural NO solenoid valves and NC solenoid valves respectively provided at upstream sides
and downstream sides of the wheel brakes and controlling the flow of the brake hydraulic pressure, low pressure accumulator
in which a fluid discharged from the wheel brakes is temporarily stored during pressure reduction braking of the NO and NC
solenoid valves, a pump, a motor pressurizing the fluid stored in the low pressure accumulator so as to discharge the fluid
to the wheel brakes or the master cylinder, a NC shuttle valve and a TC solenoid valve for traction control, and an electronic
control opening and closing valve between the low pressure accumulator and the pump,
wherein a section between the plural NO and NC solenoid valves and the low pressure accumulator is formed as a closed circuit
section to retract the pads from the disc, and the pump is driven to move a part of the fluid in the closed circuit section
to an outlet of the pump, and

wherein a section between the electronic control opening and closing valve and the NC shuttle valve is formed as a closed
circuit section, and after the pump is driven to move a part of the fluid in the closed circuit section between the electronic
control opening and closing valve and the NC shuttle valve to the outlet of the pump, the electronic control opening and closing
valve is opened to move a part of the fluid in the closed circuit section between the plural NO and NC solenoid valves and
the low pressure accumulator.

US Pat. No. 9,074,650

PISTON ASSEMBLY OF SHOCK ABSORBER

MANDO CORPORATION, Pyeon...

1. A piston assembly of a shock absorber provided on a vehicle, the piston assembly comprising:
a piston body provided with a center penetrated by a piston rod reciprocating in a cylinder and a repetitive pattern in which
a compression fluid passage having an inlet at a lower end thereof and a tension fluid passage having an inlet at an upper
end thereof alternately penetrate the piston body, wherein the inlets of the compression fluid passage and the tension fluid
passage have larger cross-sectional areas than corresponding outlets of the compression fluid passage and the tension fluid
passage, and the compression fluid passage and the tension fluid passage are kept open;

a compression retainer seated at an upper portion of the piston body and penetrated by a connection hole corresponding to
the compression fluid passage;

a tension retainer seated at a lower portion of the piston body and penetrated by a connection hole corresponding to the tension
fluid passage; and

a seating unit formed between the compression retainer and the piston body and between the piston body and the tension retainer
to determine positions at which the compression retainer and the tension retainer are coupled to the piston body,

wherein the seating unit comprises:
a first seating assembly provided at an edge of a first rod hole formed at a center of the piston body and penetrated by the
piston rod and at an edge of a second rod hole formed at a center of the compression retainer and penetrated by the piston
rod, the edge of the second rod hole facing the edge of the first rod hole; and

a second seating assembly provided at the edge of the first rod hole and at an edge of a third rod hole formed at a center
of the tension retainer and penetrated by the piston rod, the edge of the third rod hole facing the edge of a first rod hole,
and

wherein:
a contact surface of the compression retainer arranged between the second rod hole and the connection hole of the compression
retainer to adjoin the piston body is provided with a raised step protruding toward the piston body to have a stepped shape;
and

a contact surface of the tension retainer arranged between the third rod hole and the connection hole of the tension retainer
to adjoin the piston body is provided with a raised step protruding toward the piston body to have a stepped shape,

wherein the first seating assembly comprises:
at least one first protrusion protruding from the edge of the first rod hole toward the compression retainer;
a first ring groove depressed along the edge of the second rod hole to accommodate the first protrusion; and
a plurality of first auxiliary protrusions arranged along the first ring groove to be spaced apart from each other by a distance
corresponding to a distance between both ends of the first protrusion and protruding toward the piston body.

US Pat. No. 10,071,717

ELECTRIC BRAKE SYSTEM

MANDO CORPORATION, Gyeon...

1. An electric brake system comprising:a hydraulic pressure supply device configured to generate hydraulic pressure using a piston which is operated by means of an electrical signal that is output corresponding to a displacement of a brake pedal, and including a first pressure chamber provided at one side of the piston being movably accommodated inside a cylinder block and connected to one or more wheel cylinders, and a second pressure chamber provided at the other side of the piston and connected to the one or more wheel cylinders;
a first hydraulic flow path configured to communicate with the first pressure chamber and provide hydraulic pressure generated in the first pressure chamber to the one or more wheel cylinders;
a second hydraulic flow path configured to communicate with the first pressure chamber and provide the hydraulic pressure generated in the first pressure chamber to the one or more wheel cylinders;
a third hydraulic flow path configured to communicate with the second pressure chamber, branch at the middle of the third hydraulic flow path to be connected to each of the first hydraulic flow path and the second hydraulic flow path, and provide hydraulic pressure generated in the second pressure chamber to the one or more wheel cylinders;
a sixth hydraulic flow path configured to communicate with the first pressure chamber, branch at the middle of the sixth hydraulic flow path to be connected to each of the first hydraulic flow path and the second hydraulic flow path, and deliver hydraulic pressure of the one or more wheel cylinders to the first pressure chamber;
a seventh hydraulic flow path configured to connect the sixth hydraulic flow path to the third hydraulic flow path to deliver the hydraulic pressure of the one or more wheel cylinders to the second pressure chamber;
a first control valve provided at the first hydraulic flow path and configured to control an oil flow;
a second control valve provided at the second hydraulic flow path and configured to control an oil flow;
a third control valve provided at the third hydraulic flow path and configured to control an oil flow;
a seventh control valve provided at the sixth hydraulic flow path and configured to control an oil flow;
an eighth control valve provided at the seventh hydraulic flow path and configured to control an oil flow;
a first hydraulic circuit including first and second branching flow paths which branch from the first hydraulic flow path and are connected to two wheel cylinders, respectively, and first and second inlet valves which control the first and second branching flow paths, respectively; and
a second hydraulic circuit including third and fourth branching flow paths which branch from the second hydraulic flow path and are connected to two wheel cylinders, respectively.

US Pat. No. 9,650,068

ELECTRONIC CONTROL UNIT AND METHOD FOR COMPENSATING FOR TORQUE STEER

MANDO CORPORATION, Gyeon...

11. A method for compensating a torque steer in an electronic control unit of a motor driven power steering system, the method
comprising:
a drive shaft driving torque calculating step of calculating a drive shaft driving torque value using engine operation information
that contains an engine torque value and an engine speed value and transmission operation information containing a torque
converter speed value and a gear ratio;

a slip determining step of determining whether a slip of a vehicle occurs using behavior information of the vehicle containing
one or more of a front wheel rotational speed, a rear wheel rotational speed, and a longitudinal acceleration value;

an actual driving torque value calculating step of, if it is determined in the slip determining step that a slip does not
occur in the vehicle, setting a slip index to a specific value, and if it is determined in the slip determining step that
a slip occurs in the vehicle, calculating the slip index and calculating an actual driving torque value of the vehicle using
the drive shaft driving torque value and the slip index;

a compensating current calculating step of calculating a torque steer degree using the actual driving torque value, and calculating
a torque steer compensation current value for compensating the torque steer using the torque steer degree; and

a torque steer compensating step of calculating a final control current value by adding the torque steer compensation current
value to a basic control current value that is calculated using a steering angle and a steering torque value, and generating
a current value according to the final control current value to supply the control current to an electric motor.

US Pat. No. 9,533,574

SPEED CONTROL SYSTEM AND SPEED CONTROL METHOD FOR CURVED ROAD SECTION

MANDO CORPORATION, Pyeon...

1. A speed control system for a curved road section, comprising:
a wireless communication module that supports communication with road-side units and receives road information for a plurality
of points on a curved road adjacent to the road-side units, from the road-side units;

an allowable speed calculation unit that calculates maximum allowable speeds that are the highest speeds at which a vehicle
is driven, for each of the plurality of points, using the road information;

an optimum speed calculation unit that calculates optimum speeds of the vehicle, for each of the plurality of point, in an
acceleration and deceleration range that is set in consideration of a predetermined acceleration and deceleration limit of
the vehicle; and

a control module that displays the optimum speeds calculated by the optimum speed calculation unit or provides the calculated
optimum speeds to another control system in the vehicle such that the speed of the vehicle is controlled.

US Pat. No. 9,428,165

HYDRAULIC UNIT OF ELECTRONIC CONTROL BRAKE SYSTEM

MANDO CORPORATION, Pyeon...

1. A hydraulic unit of an electronic control brake system comprising a modulator block on which components comprising a plurality
of normal open/normal closed (NO/NC) valves for adjusting brake hydraulic pressure supplied to wheels of a vehicle, a driving
force control valve, a shuttle valve, a low-pressure/high-pressure accumulator, pumps and a motor are mounted and in which
flow paths for connecting the components are formed, the hydraulic unit comprising:
a pair of master cylinder connection portions arranged on an upper side of a front side of the modulator block in a lateral
direction;

a first valve row having a plurality of first valve accommodation bores that are arranged in a rear side of the modulator
block in the lateral direction and accommodate the plurality of NO valves;

a second valve row having a plurality of second valve accommodation bores that are arranged in the rear side of the modulator
block in the lateral direction and accommodate the plurality of NC valves;

a pair of low-pressure accumulator bores arranged in a bottom side of the modulator block in the lateral direction;
pump accommodation bores arranged between the first valve row and the second valve row, formed in the lateral direction with
respect to a direction in which valve accommodation bores are formed, and formed in both sides of the modulator block;

motor accommodation bores that are formed between two pump accommodation bores to be perpendicular to the pump accommodation
bores and have the motor for driving the pumps inserted into the pump accommodation bores formed in the motor accommodation
bores;

a pair of shuttle valve (ESV) accommodation bores arranged between the first valve row and the second valve row and connected
to a suction side of each of the pump accommodation bores and the master cylinder connection portions;

a pair of driving force control valve (TC) accommodation bores arranged between wheel cylinder connection portions formed
in the modulator block and the first valve row; and

a pair of high-pressure accumulator bores arranged in the modulator block in a longitudinal direction,
wherein the pair of high-pressure accumulator bores are formed to have an arrangement parallel to the motor accommodation
bores.

US Pat. No. 9,285,285

SENSOR UNIT FOR MEASURING BRAKE FORCE OF PARKING CABLE AND ELECTRONIC PARKING BRAKE WITH THE SAME

MANDO CORPORATION, Gyeon...

1. A sensor unit for detecting intensity of force exerted on a parking cable upon braking a vehicle, the sensor unit comprising:
a sensor housing, in which a Hall IC is installed to sense variation of magnetic force caused by displacement of a magnet;
a magnet housing arranged to be movable within the sensor housing, the magnet being installed in the magnet housing, wherein
the force exerted on the parking cable causes the parking cable to move a distance in a direction, and also causes the magnet
to move the distance in the direction; and

an elastic member arranged between the magnet housing and the sensor housing, to elastically support the magnet housing,
wherein the magnet housing is coupled to a power conversion unit to operate for pulling of the parking cable or release of
the pulling,

wherein the magnet housing comprises:
a magnet support, at which the magnet is installed, comprising a first rectangular protrusion and a second rectangular protrusion;
and

a shaft coupled to the magnet support and encompassed by the elastic member, the shaft comprising:
a first rectangular groove engaged with the first rectangular protrusion;
a second rectangular groove engaged with the second rectangular protrusion;
a portion protruded outwardly of the sensor housing through one side of the sensor housing; and
a fitting groove at the portion protruded outwardly of the sensor housing, wherein a bearing is fitted around the fitting
groove.

US Pat. No. 9,121,928

RADAR APPARATUS AND METHOD OF ASSEMBLING THE SAME

MANDO CORPORATION, Pyeon...

1. A radar apparatus comprising:
a first printed circuit board having a top side on which a radar antenna module is mounted, and a bottom side on which a base
band circuit module is mounted, wherein an RF module is wire-bonded to the first printed circuit board through a hole;

a second printed circuit board on which a signal processing circuit module is mounted; and
a base plate having a top side coupled with the bottom side of the first printed circuit board, and a bottom side coupled
with the top side of the second printed circuit board.

US Pat. No. 9,083,270

ELECTRIC BICYCLE DRIVING APPARATUS

MANDO CORPORATION, Pyeon...

1. An electric bicycle driving apparatus comprising:
a speed change mode operator to output a low-speed mode signal or a high-speed mode signal;
a controller to receive the low-speed mode signal or high-speed mode signal output from the speed change mode operator and
output a first control signal corresponding to the low-speed mode signal or a second control signal corresponding to the high-speed
mode signal;

a generation-signal provider to provide a generation signal output from a generator;
a motor-driver operating-signal regulator to receive the first control signal or second control signal when the speed change
mode operator outputs the low-speed mode signal or high-speed mode signal, to regulate a level of the generation signal output
from the generation-signal provider and to provide the resulting signal to a motor driver that drives a motor, wherein the
motor-driver operating-signal regulator provides a lowered level of generation signal to the motor driver that is operated
upon receiving power of a battery, and cuts off an abnormal signal transmitted from the motor driver;

a motor-driver operating-signal sensor electrically connected to the motor-driver operating-signal regulator and motor driver,
the sensor serving to sense a current operating signal for the motor driver output from the motor-driver operating-signal
regulator, wherein the controller contains a preset reference range of the operating signal for the motor driver; and

a motor-driver operating-signal decider to decide whether or not the current operating signal for the motor driver sensed
by the motor-driver operating-signal sensor is within the reference range of the operating signal for the motor driver under
control of the controller, wherein the controller temporarily stops operation of the motor driver if the motor-driver operating-signal
decider decides that the current operating signal for the motor driver is not within the reference range of the operating
signal for the motor driver.

US Pat. No. 9,074,649

COMBINING STRUCTURE OF SHOCK ABSORBER

MANDO CORPORATION, Pyeon...

1. A combining structure of a shock absorber, comprising:
a shock absorber including:
a cylinder filled with a working fluid, and
a piston rod embedded in the cylinder to reciprocate in a longitudinal direction of the cylinder and provided with a connecting
passage arranged therein toward an end of the piston rod at which a piston valve is installed;

a bypass passage
adapted to penetrate the piston rod in a direction perpendicular to a longitudinal direction of the piston rod, and
connected with an upper end of the connecting passage; and
a stopper assembly having an outer side, with at least one gateway penetrating the stopper assembly to communicate with the
bypass passage, the stopper assembly being coupled with the piston rod to keep the piston valve pressed against the end of
the piston rod and fixed,

wherein the stopper assembly includes:
a communicating body adapted to contact, at a lower end thereof, an upper side of the piston valve and provided, at an outer
side thereof, with the at least one gateway to communicate with the bypass passage; and

a fixture disposed at an upper side of the communicating body to press and fix the communicating body and the piston valve
and to keep the upper side of the communicating body sealed,

wherein the at least one gateway is arranged to have a distance to the piston valve which is shorter than or equal to a distance
between the bypass passage and the piston valve,

wherein the communicating body comprises:
a washer segment fixed to a step portion formed at an outer circumferential surface of a lower portion of the piston rod,
an inner edge of the washer segment closely contacting the outer circumferential surface of the lower portion of the piston
rod;

a communicating channel extending upward along an outer edge of the washer segment, and formed in a cylindrical shape with
the at least one gateway penetrating the communicating channel; and

a seat extending along an edge of an upper side of the communicating channel and forming a step, to allow an edge of a lower
end of the fixture to be seated at the seat.

US Pat. No. 10,144,401

INSPECTION VALVE

MANDO CORPORATION, Gyeon...

1. An inspection valve installed at a flow path connecting a reservoir to a chamber of a master cylinder, comprising:a housing at which a bore is formed and having one side at which an inlet hole is formed;
a plunger provided to be movable along the bore of the housing;
a seat member configured to close one side of the bore and through which an outlet hole passes; and
an elastic member having one side supported by the plunger and the other side supported by the seat member,
wherein the plunger comprises a slit provided at an outer surface of the plunger in a length direction of the bore so that oil flowing in through the inlet hole flows toward an opposite side of the plunger along the slit.

US Pat. No. 9,593,728

DISK BRAKE CALIPER PISTON SYSTEM

MANDO CORPORATION, Gyeon...

1. A disk brake piston system comprising:
a piston comprising:
a metallic outer wall surrounding a central axis, the outer wall being of a material and a thickness which that could be formed
by deep drawing;

a metallic front wall closing one end of the outer wall, the front wall including a curved area extending toward an interior
of the piston, the front wall being of a material and having a thickness that could be formed by deep drawing; and

a sleeve positioned at least partially within the piston and configured to interface with an interior side surface of the
outer wall such that the sleeve and the piston are restrained from rotating relative to one another around an axis parallel
to the central axis, the sleeve comprising a flat or curved internal surface, having a non-circular cross-section, wherein
the sleeve comprises a polymeric material.

US Pat. No. 9,522,696

METHOD AND APPARATUS FOR CONTROLLING ELECTRIC POWER STEERING

MANDO CORPORATION, Pyeon...

1. A method for controlling power steering, comprising:
a breakdown detection step of detecting whether a torque sensor has broken down;
an information reception step of receiving steering angle information and vehicle speed information in the case in which the
torque sensor has broken down;

a compensation target value calculation step of calculating a self-aligning torque, a damping force, an inertial force, and
a frictional force of an electric power steering apparatus by using one or more of the steering angle information and the
vehicle speed information; and

a current control step of calculating a steering assist force based on the compensation target value and controlling the supply
of a motor control current that corresponds to the steering assist force.

US Pat. No. 9,397,496

FORCED DISCHARGE CIRCUIT OF BATTERY CHARGER FOR ELECTRIC VEHICLE, BATTERY CHARGER FOR ELECTRIC VEHICLE, AND ELECTRIC VEHICLE HAVING FUNCTION OF THE BATTERY CHARGE

MANDO CORPORATION, Pyeon...

18. In a control system of a battery charger for an electric vehicle, which controls a charging operation of the battery charger
that is supplied with power from an electric vehicle supply equipment and charges a vehicle driving battery built in the electric
vehicle, an electric vehicle including an onboard battery charger and having a charging function, the electric vehicle comprising:
an onboard battery charger built in the electric vehicle and configured to be supplied with power from the electric vehicle
supply equipment to charge the battery; and

the battery configured to be supplied with power from the onboard battery charger and be charged,
wherein the onboard battery charger comprises:
an AC power supply configured to supply commercial power;
a filter/rectifier configured to rectify the commercial power supplied from the AC power into a DC voltage;
a converter configured to convert the DC voltage output from the filter/rectifier into a voltage that is chargeable to a battery;
and

a discharge circuit connected in parallel to the converter and configured to forcibly discharge a high voltage applied to
the converter when input power is removed from the AC power supply,

wherein the discharge circuit comprises:
an micro control unit (MCU) configured to generate a control signal according to a charge state of the battery charger;
a discharge resistor connected in parallel to the battery charger;
a relay connected in series to the discharge resistor and configured to operate in an on or off state according to the control
signal of the MCU;

an insulation control device provided between the MCU and the relay to control a current flow according to the control signal
of the MCU; and

a field effect transistor (FET) provided between the insulation control device and the relay to control a current flowing
into the relay according to the current flow of the insulation control device.

US Pat. No. 9,212,719

SHOCK ABSORBER

MANDO CORPORATION, Pyeon...

1. A shock absorber comprising:
a piston rod reciprocating within a cylinder and having a groove formed in an outer periphery thereof;
a first piston connected to an end of the piston rod and forming an internal space recessed downward, the first piston including
a first pressure chamber through which a working fluid flows during a rebound stroke, and a third pressure chamber which is
connected to a compression passage passing therethrough in a vertical direction;

a pilot valve connected to the end of the piston rod and disposed in the internal space to selectively open or close a lower
end of the first pressure chamber;

a second piston which is connected to the end of the piston rod and of which an upper portion is received in the internal
space such that the second piston is disposed below the first piston, the second piston including a second pressure chamber
connected to the first pressure chamber, and a slit for communicating the second pressure chamber with the groove;

a guide member connected along an edge of the pilot valve to cover an upper outer periphery of the second piston and move
upward and downward while interlocking with the pilot valve;

a rebound retainer connected to the end of the piston rod and disposed below the second piston, the rebound retainer including
a fourth pressure chamber connected to the second pressure chamber; and

a disk valve assembly connected to the end of the piston rod and disposed below the rebound retainer to open or close a passage
of the fourth pressure chamber.

US Pat. No. 9,141,129

PEDAL SIMULATOR

MANDO CORPORATION, Pyeon...

1. A pedal simulator, comprising:
a main housing;
a piston provided within the main housing so as to be reciprocally movable in upward and downward directions;
a damper vertically disposed within the main housing,
a first coil spring which supports, at an upper end thereof, the piston and which is configured to generate elastic force
when being compressed according to downward movement of the piston;

a support member which is disposed beneath the first coil spring and downwardly moveable with the piston according to downward
movement of the piston, the support member having, at a center thereof, a through hole through which the damper passes;

a second coil spring which is disposed beneath the support member and supports the support member, the second coil spring
configured to generate elastic force when being compressed according to downward movement of the support member;

a damper housing fixed to a lower portion of the main housing,
wherein the damper is inserted and coupled, at a lower side thereof, into a groove portion formed in the damper housing, and
wherein the damper has, at an outside surface thereof, a protrusion portion which protrudes outwardly and is made of an elastic
material.

US Pat. No. 9,746,546

METHOD AND DEVICE FOR SENSING SURROUNDING ENVIRONMENT BASED ON FREQUENCY MODULATED CONTINUOUS WAVE RADAR

MANDO CORPORATION, Pyeon...

1. A method for detecting a target based on a frequency modulated continuous wave (FMCW) radar including a processor, the
method comprising:
transmitting, by the processor, a sensing signal for detection of the target, and receiving, by the processor, a response
signal in response to the sensing signal;

performing, by the processor, a signal processing on the response signal, and generating, by the processor, a frequency spectrum
of a beat signal;

determining, by the processor, a detection frequency band for detection of the target within a valid frequency band of the
frequency spectrum;

determining, by the processor, a threshold value to determine a target detection peak value for detection of the target among
peak values of the frequency spectrum; and

detecting, by the processor, the target based on the detection frequency band and the threshold value,
wherein the detection frequency band corresponds to a frequency band obtained by excluding a frequency band corresponding
to frequencies which are greater than a frequency of a greatest peak value among the target detection peak values, from the
valid frequency band.

US Pat. No. 9,604,617

HYDRAULIC BRAKE SYSTEM

MANDO CORPORATION, Geong...

1. A hydraulic brake system comprising a master cylinder forming a braking hydraulic pressure according to an operation of
a brake pedal, wheel brakes provided at a front wheel and a rear wheel, respectively, to provide a braking force by receiving
the braking hydraulic pressure of the master cylinder, solenoid valves provided at an inlet side and an outlet side of each
of the wheel brakes to control a flow of the braking hydraulic pressure, a low pressure accumulator temporarily storing oil
discharged from the wheel brakes during a pressure reducing braking in which the solenoid valves operate, a pump configured
to compress oil stored in the low pressure accumulator such that the oil is discharged toward the wheel brakes or the master
cylinder according to a demand, and an orifice provided at an outlet side of the pump, wherein the orifice comprises:
an outer case and an inner case provided to form a space between the outer case and the inner case while assembled to the
outer case;

a first oil passage passing from the outer case through the inner case; and
a second oil passage formed on an outer circumferential surface of the inner case and provided in the space between the outer
case and the inner case, and

the first oil passage and the second oil passage have lengths different from each other.

US Pat. No. 9,555,789

ELECTRONIC BRAKE SYSTEM

MANDO CORPORATION, Gyeon...

1. An electronic brake system including a reservoir in which oil is stored, a master cylinder having a first oil pressure
port and a second oil pressure port and coupled with the reservoir to receive the oil, a pedal displacement sensor configured
to detect a displacement of a brake pedal, and a simulation device connected to the master cylinder and provided so that reaction
is provided according to a pedal effort of the brake pedal, the electronic brake system comprising:
a hydraulic pressure supply unit configured to output an electrical signal through the pedal displacement sensor to operate
a motor when the brake pedal operates, and configured to convert rotatory power of the motor to rectilinear movement;

an oil pressure control unit having a first oil pressure circuit and a second oil pressure circuit connected to the hydraulic
pressure supply unit through a main oil pressure path, and each configured to control two wheels so that a hydraulic pressure
is received using a force generated by the hydraulic pressure supply unit to perform braking; and

an electronic control unit configured to control the motor and valves based on hydraulic pressure information and pedal displacement
information,

wherein the oil pressure control unit includes:
a first inlet valve and a second inlet valve respectively disposed at upper streams of two wheel cylinders to control the
two wheels provided in the first oil pressure circuit;

a third inlet valve and a fourth inlet valve respectively disposed at upper streams of two wheel cylinders to control the
two wheels provided in the second oil pressure circuit;

a first balance valve configured to connect or disconnect the two wheel cylinders to which the first inlet valve and the second
inlet valve are connected;

a second balance valve configured to connect or disconnect the two wheel cylinders to which the third inlet valve and the
fourth inlet valve are connected;

a first dump valve connected to any one wheel cylinder among the two wheel cylinders provided in the first oil pressure circuit
and configured to control a flow of oil discharged from the connected wheel cylinder; and

a second dump valve connected to any one wheel cylinder among the two wheel cylinders provided in the second oil pressure
circuit and configured to control a flow of oil discharged from the connected wheel cylinder.

US Pat. No. 9,522,673

TRANSMISSION CONTROL APPARATUS FOR BELT TYPE MILD HYBRID VEHICLE AND TRANSMISSION CONTROL METHOD USING THE SAME

MANDO CORPORATION, Pyeon...

1. A transmission control method for a belt type mild hybrid vehicle, comprising:
collecting, by an integrated control unit, shifting information; wherein the collecting of the shifting information includes
receiving target shifting stage number information and current stage number information from a transmission control unit;

setting, by the integrated control unit, a target torque of a motor generator in accordance with the shifting information;
determining whether shifting of the vehicle is being performed, based on the shifting information; and
controlling, by a motor control unit, the motor generator,
wherein the controlling of the motor generator comprises:
controlling, by the motor control unit, the motor generator in accordance with the set target torque when it is determined
that the shifting of the vehicle is not being performed;

determining whether a driving shaft of the vehicle is being driven when it is determined that the shifting of the vehicle
is being performed; and

re-setting a target torque upper limit value of the motor generator as a negative number when it is determined that the driving
shaft of the vehicle is being driven.

US Pat. No. 9,249,854

PISTON VALVE ASSEMBLY FOR SHOCK ABSORBER

MANDO CORPORATION, Pyeon...

7. A piston valve assembly for a shock absorber, comprising:
a piston rod reciprocating within a cylinder;
a main piston mounted on the piston rod to partition the cylinder into upper and lower chambers, wherein a plurality of compression
passages and a plurality of rebound passages pass through the main piston in a vertical direction;

a pressure valve mounted on the piston rod and disposed below the main piston, wherein a first pressure chamber having a ring
shape around the piston rod is formed in a bottom surface of the pressure valve and an inlet hole is formed in an upper portion
of the first pressure chamber;

a disk installed on the inlet hole so as to prevent a continuous increase in a pressure of the first pressure chamber;
a lower retainer mounted on the piston rod and disposed below the pressure valve, wherein a top surface of the lower retainer
is opened;

a plurality of bypass passages formed on an outer periphery of the piston rod from an upper side of the main piston to an
upper side of the lower retainer along a vertical length direction;

a guide assembly mounted on the piston rod and disposed between the pressure valve and the lower retainer to surround an outer
periphery of the pressure valve and a bottom surface of the pressure valve, wherein the guide assembly tightly contacts the
bottom surface of the pressure valve in a high-frequency mode and moves down toward the lower retainer in a low-frequency
mode; and

a lower disk assembly mounted on the piston rod and disposed between the guide assembly and the lower retainer, wherein the
lower disk assembly forms a second pressure chamber in the lower retainer while covering the opened top surface of the lower
retainer, forms an open passage communicating the second pressure chamber with the lower chamber in the high-frequency mode,
and blocks the communication between the second pressure chamber and the lower chamber in the low-frequency mode due to the
downward movement of the guide assembly,

wherein the disk is installed in the piston rod, with a spacer being disposed therebetween.

US Pat. No. 9,086,111

VALVE ASSEMBLY OF SHOCK ABSORBER

MANDO CORPORATION, Pyeon...

1. A valve assembly of a shock absorber, comprising:
a valve housing coupled to a lower end of a piston rod having an orifice hole formed through the piston rod, the valve housing
having a space formed therein, a lower end of the space being open to communicate with the orifice hole;

a frequency sensitive valve unit including a free piston configured to vertically partition the space into an upper chamber
and a lower chamber and a lower stopper extending downward from a center of the free piston; and

a sub-valve unit disposed in the lower end of the space and having a compression orifice and an extension orifice,
wherein operation of the sub-valve unit is controlled by ascending and descending of the free piston,
wherein the sub-valve unit comprises a valve body disposed in the lower end of the space and a suction valve provided at an
upper portion of the valve body to open or close the compression orifice, and a side fluid channel is formed between an upper
surface of the suction valve and a lower end of a side wall, and

wherein the side wall is in close contact with and supported by an upper side of the suction valve to block the side fluid
channel when the lower stopper is elastically deformed.

US Pat. No. 10,099,719

APPARATUS AND METHOD FOR MEASURING OFFSET OF EPS MOTOR POSITION SENSOR

MANDO CORPORATION, Pyeon...

1. An apparatus for measuring an offset of an electronic power steering (EPS) motor sensor, comprising:a drive motor that drives an EPS motor at a predetermined constant speed;
a back electromotive force measurement circuit that measures a back electromotive force generated by the EPS motor so as to generate a back electromotive force signal;
a motor position sensor that senses the rotation of the EPS motor so as to generate a position signal; and
an offset calculation circuit that calculates an offset value using a difference between the back electromotive force signal measured in the back electromotive measurement circuit and the position signal generated by the motor position sensor,
wherein the motor position sensor is located outside the EPS motor, and the drive motor drives the EPS motor in a forward direction and a reverse direction.

US Pat. No. 9,862,367

MASTER CYLINDER FOR BRAKE SYSTEM

MANDO CORPORATION, Pyeon...

1. A master cylinder for a brake system, comprising:
a cylinder body having a bore therein;
at least one piston provided in the bore to be moved forwards and rearwards;
a liquid pressure chamber compressed by the piston;
a brake liquid port connected to a reservoir and configured to supply a brake liquid to the liquid pressure chamber; and
a brake liquid discharge opening for discharging the brake liquid in the liquid pressure chamber to a wheel brake of a wheel,
wherein a valve unit comprising a check valve for controlling unidirectional flows of the brake liquid introduced from the
reservoir to the liquid chamber and a fluid resistance hole opened in two directions and having a size smaller than the size
of the brake liquid discharge opening is provided in the brake liquid port,

wherein the cylinder body has accommodation grooves on an inner surface of the bore so that a sealing member and a packing
member are fixed inside the accommodation grooves to seal an inside of the cylinder body, and

wherein two or three fluid resistance holes are provided.

US Pat. No. 9,685,011

VEHICLE SAFETY CONTROL APPARATUS AND METHOD USING CAMERAS

MANDO CORPORATION, Pyeon...

1. A vehicle safety control apparatus using cameras, comprising:
a first camera for photographing a current object at least one of a narrow angle and a straight angle during running;
a second camera for photographing the current object at a wide angle during the running;
an image processor for performing image processing on first current object image data captured by the first camera and second
current object image data captured by the second camera;

a recognition sensor for recognizing the first and second current object image data on which the image processor has performed
the image processing;

a storage for causing the first and second current object image data recognized by the recognition sensor to match preset
reference object-specific data and separately store the first and second current object image data matching the reference
object-specific data; and

a controller for receiving the first and second current object image data recognized by the recognition sensor and for delivering
a storage command to the storage so that the first and second current object image data matching the reference object-specific
data are separately stored.

US Pat. No. 9,643,650

LANE CHANGE CONTROL DEVICE AND CONTROL METHOD

MANDO CORPORATION, Pyeon...

1. A lane change control device for controlling a vehicle, the device comprising:
a space recognition unit, including a camera sensor, that
detects a front object using the camera sensor of the vehicle,
recognizes an empty space, in which the front object is not located, inside an adjacent lane that is adjacent to a traveling
lane, and

determines a target position, to which the vehicle is to move, within the empty space on a basis of a lane modeling equation
determined from a lateral offset, which is a distance between a center of the camera sensor and a center of the adjacent lane,
a vehicle's traveling velocity (V), and a lane change request time (t);

a control unit that performs a lane change control and controls at least one of the vehicle's steering angle and a vehicle
velocity such that the vehicle moves to the target position along a path generated for moving from a current vehicle position
to the target position; and

a maximum steering angle limiting unit, including a velocity sensor of the vehicle, that limits a maximum steering angle on
a basis of velocity information acquired using the velocity sensor of the vehicle,

wherein the control unit is configured to move the vehicle along the path to the empty space, on a basis of the vehicle's
width, length, and limited maximum steering angle.

US Pat. No. 9,506,520

DAMPING FORCE VARIABLE VALVE ASSEMBLY

MANDO CORPORATION, Pyeon...

1. A damping force variable valve assembly, which is installed in a damping force variable shock absorber to adjust a damping
force of the shock absorber, the damping force variable valve assembly comprising:
a solenoid configured to generate a magnetic force when an electric current is applied thereto;
a spool configured to be moved by the magnetic force of the solenoid;
a spool guide configured to surround the spool so as to guide a movement of the spool;
a valve body which is disposed around the spool guide;
a main valve which is installed to cover a main passage formed in the valve body and generate a damping force;
a back pressure chamber which is formed to have a back pressure pressurizing the main valve from the back of the main valve;
a chamber forming body which is installed outside the valve body to form the back pressure chamber; and
an elastic opening/closing portion which is installed in the valve body to open and close a pressure adjustment passage communicating
the inside of the back pressure chamber with the outside of the back pressure chamber,

wherein as a flow path within the damping force variable valve assembly is changed by interaction between the spool and the
spool guide, the damping force of the shock absorber is variable between a hard mode in which the back pressure of the back
pressure chamber is increased and a soft mode in which the back pressure of the back pressure chamber is decreased,

wherein, in a case where a flow velocity of a working fluid is low in the hard mode, the elastic opening/closing portion opens
the pressure adjustment passage when an internal pressure of the back pressure chamber exceeds a preset pressure,

wherein the elastic opening/closing portion includes a blocking member configured to block the pressure adjustment passage,
and an elastic member configured to elastically support the blocking member and to be deformed when the internal pressure
of the back pressure chamber exceeds the preset pressure and open a flow passage by the blocking member and the elastic member,

wherein the elastic opening/closing portion is disposed on an exit side of the pressure adjustment passage in the valve body,
and a concave portion which is connected to the pressure adjustment passage is formed in the valve body such that the elastic
opening/closing portion is disposed therein,

wherein the blocking member has a ring shape,
wherein the pressure adjustment passage is plurally provided and the plurality of pressure adjustment passages are circularly
arranged in the valve body,

wherein the concave portion is formed to have a circular shape to connect all the pressure adjustment passages, and
wherein the blocking member having the ring shape is disposed to close all the pressure adjustment passages circularly arranged
in the valve body.

US Pat. No. 9,347,507

ELECTRONIC PARKING BRAKE SYSTEM AND METHOD OF CONTROLLING THE SAME

MANDO CORPORATION, Pyeon...

1. An electronic parking brake (EPB) system comprising an EPB actuator which has a motor and provides disc brakes provided
in wheels with parking brake power by rotating the motor, the EPB system comprising:
a parking switch turned on or off by a driver;
a current detector configured to detect a motor current flowing through the motor of the EPB actuator;
a motor driving unit configured to drive the motor of the EPB actuator; and
an electronic control unit which applies a parking brake in which the motor of the EPB actuator is rotated by the motor driving
unit in one direction to provide the disc brakes with the parking brake power when the parking switch is turned on, calculates
an impedance of the motor when a motor current value detected by the current detector is higher than a preset value while
applying the parking brake, and determines whether a motor stuck failure occurs based on the calculated impedance of the motor.

US Pat. No. 9,079,472

SUSPENSION SPRING FOR SHOCK ABSORBER USING CARBON FIBER REINFORCED PLASTIC

MANDO CORPORATION, Pyeon...

1. A suspension spring for a shock absorber using carbon fiber reinforced plastic, the suspension spring comprising:
a piston rod reciprocatingly connected to a cylinder filled with working fluid;
a first sheet mounted on an end portion of the cylinder;
a second sheet mounted on an end portion of the piston rod; and
a spring unit provided by stacking a plurality of unit bodies made of a prepreg of a multi-stacked carbon fiber synthesis
resin, the unit bodies having openings, through centers of which the piston rod passes and which gradually widen toward one
side,

wherein the respective unit bodies are stacked along a length direction of the piston rod such that the openings face one
another, and

the stack of the unit bodies includes one of the following structures:
the opening of the unit body which is disposed at the most bottom end in the plurality of the unit bodies is faced to the
fist sheet and the opening of the unit body which is disposed at the most upper end in the plurality of the unit bodies is
faced to the second sheet,

the opening of the unit body which is disposed at the most bottom end in the plurality of the unit bodies is faced to the
second sheet and the opening of the unit body which is disposed at the most upper end in the plurality of the unit bodies
is faced to the second sheet,

the opening of the unit body which is disposed at the most bottom end in the plurality of the unit bodies is faced to the
first sheet and the opening of the unit body which is disposed at the most upper end in the plurality of the unit bodies is
faced to the first sheet, or

the opening of the unit body which is disposed at the most bottom end in the plurality of the unit bodies is faced to the
second sheet and the opening of the unit body which is disposed at the most upper end in the plurality of the unit bodies
is faced to the first sheet.

US Pat. No. 9,944,262

ELECTRIC BRAKE SYSTEM

MANDO CORPORATION, Gyeon...

1. An electric brake system comprising:a master cylinder connected to a first reservoir storing oil therein, provided with first and second chambers and first and second pistons respectively provided at the first and second chambers, and configured to discharge oil according to a pedal effort of a brake pedal;
a simulation device configured to provide a reaction force according to the pedal effort of the brake pedal, and provided with a simulation chamber that is connected to the master cylinder and a simulation flow path to accommodate oil therein;
a hydraulic pressure supply device configured to generate hydraulic pressure using a rotational force of a motor that is activated in response to an electrical signal output corresponding to a displacement of the brake pedal; and
a hydraulic control unit configured to deliver the hydraulic pressure delivered from the hydraulic pressure supply device to a wheel cylinder provided at each of wheels, and connected to the first and second chambers of the master cylinder through first and second backup flow paths and connected to the hydraulic pressure supply device through a hydraulic flow path,
wherein hydraulic pressure provided from the master cylinder is selectively delivered to the simulation flow path and the first and second backup flow paths, and
wherein first and second hydraulic ports are formed at the master cylinder to connect the first and second chambers to the first and second backup flow paths, respectively, and the simulation flow path is located between the first and second hydraulic ports.

US Pat. No. 9,855,935

EMERGENCY BRAKING SYSTEM FOR PROTECTING MOVING OBJECT AND METHOD FOR CONTROLLING THE SAME

MANDO CORPORATION, Pyeon...

1. An emergency braking system, including a sensing unit installed in a vehicle to sense a moving object around the vehicle,
the emergency braking system comprising:
a receiving unit that receives sensing signals sensed by the sensing unit;
a prediction position selecting unit that, when the moving object is sensed through fusion between the sensing signals received
by the receiving unit, selects a lateral prediction position of the sensed moving object predicted to collide with the vehicle
according to a lateral movement of the sensed moving object; and

a braking determining unit that determines a braking control suspension, a warning, an emergency braking, or an emergency
braking according to whether

the lateral prediction position selected by the prediction position selecting unit is located inside a vehicle width or outside
the vehicle width and

a longitudinal distance between the vehicle and the moving object is within a preset warning braking distance and a preset
emergency braking control distance.

US Pat. No. 9,656,651

ELECTRONIC BRAKE SYSTEM

MANDO CORPORATION, Gyeon...

1. An electronic brake system, which includes a reservoir storing oil, a master cylinder having first and second hydraulic
ports and coupled to the reservoir so as to receive the oil, a pedal displacement sensor measuring a displacement of a brake
pedal, and a simulation device connected to the master cylinder to provide a reaction force corresponding to a pedal effort
of the brake pedal, comprising:
a hydraulic pressure supply device having a motor configured to be rotated by receiving an electrical signal from the pedal
displacement sensor when the brake pedal is operated, a gear pump configured to discharge and suction a hydraulic pressure
depending on a rotational force of the motor, and a power transmission unit configured to deliver the rotational force of
the motor to the gear pump;

a hydraulic control unit having first and second hydraulic circuits configured to receive the hydraulic pressure by a force
generated by the hydraulic pressure supply device to control hydraulic pressure flows delivered to wheel cylinders provided
on wheels; and

an electronic control unit configured to control the motor and valves based on hydraulic pressure information and pedal displacement
information,

wherein the gear pump is connected to the first hydraulic circuit through a first hydraulic passage and to the second hydraulic
circuit through a second hydraulic passage connected to a branch passage that is branched off from the first hydraulic passage,
and

the electronic brake system further comprising:
a release valve provided on a passage connecting the branch passage with the reservoir and opened to discharge the hydraulic
pressure to the reservoir through the first hydraulic passage and the second hydraulic passage, and

wherein one end of the gear pump is connected to the reservoir and the other end of the pump is connected to the first hydraulic
circuit to provide a common pressure to the first and second hydraulic circuits.

US Pat. No. 9,334,928

PLANETARY GEAR APPARATUS

MANDO CORPORATION, Pyeon...

1. A planetary gear apparatus comprising:
a plurality of input planetary gears externally meshed with an input sun gear rotating in conjunction with an input shaft;
a plurality of output planetary gears externally meshed with an output sun gear rotating in conjunction with an output shaft;
connecting shafts connecting the input planetary gears and the output planetary gears facing each other;
a resilient support member provided between at least one pair of the input and output planetary gears among pairs of the input
and output planetary gears connected with each other through the connecting shafts, and resiliently supporting the input and
output planetary gears in axially opposite directions; and

a support member coupled to the connecting shaft to maintain a gap between the input and output planetary gears coupled to
one of the connecting shafts other than the connecting shaft provided with the resilient support member,

wherein a step part protruding in a radial direction is integrally formed with a middle outer peripheral surface of the connecting
shaft provided with the resilient support member to prevent a gap between the input and output planetary gears from being
reduced by more than a predetermined distance, or

wherein an axially extended support part is integrally formed with one of the input and output planetary gears coupled to
the connection shaft provided with the resilient support member to prevent the gap between the input planetary gear and the
output planetary gear from being reduced by more than a predetermined distance.

US Pat. No. 9,327,700

ELECTRIC PARKING BRAKE APPARATUS

MANDO CORPORATION, Gyeon...

1. An electric parking brake apparatus comprising:
a worm shaft coupled to a motor shaft and formed with first gear teeth on an outer peripheral surface thereof and a first
protrusion on the outer peripheral surface thereof between the first gear teeth and the motor shaft; and

a rotating member formed on an outer peripheral surface thereof with second gear teeth engaged with the first gear teeth to
rotate about a hinge according to rotation of the worm shaft, and on the outer peripheral surface thereof with a second protrusion
that contacts the first protrusion to restrict the rotation of the worm shaft such that the rotating member does not rotate
any more after rotating about the hinge by a predetermined angle.

US Pat. No. 9,266,514

HYDRAULIC BRAKING DEVICE AND METHOD FOR CONTROLLING THE SAME

Mando Corporation, Gyeon...

1. A hydraulic braking device comprising:
a reservoir for storing hydraulic oil;
a hydraulic pressure supply unit for sucking hydraulic oil from the reservoir and supplying braking pressure to a wheel cylinder;
a main flow path for supplying the braking pressure of the hydraulic pressure supply unit to the wheel cylinder;
a pressurizing valve for opening/closing the main flow path;
a master cylinder for generating braking pressure;
a sub flow path for supplying the braking pressure of the master cylinder to the main flow path;
a shutoff valve for opening/closing the sub flow path; and
a controller for detecting the pressure of the main flow path in a state where both of the shutoff valve and the pressurizing
valve are closed, and determining that a leak occurred in the pressurizing valve when the detected pressure is higher than
a preset value,

wherein when it is determined that the leak occurs in the pressurizing valve, the controller opens the shutoff valve to lower
the pressure of the main flow path.

US Pat. No. 9,168,955

SMART PARKING ASSIST SYSTEM OF VEHICLE AND CONTROL METHOD THEREOF

MANDO CORPORATION, Pyeon...

1. A parking assist system comprising:
a state sensor to sense a state of a vehicle;
an obstacle sensor to sense obstacles present at a front side, a rear side or lateral sides of the vehicle;
an interface to provide a driver with information about a state or operation of the vehicle; and
a controller to compute a parking path for the vehicle based on results of sensing by the state sensor and the obstacle sensor,
control steering of the vehicle such that the vehicle is parked at a target position along the computed parking path, and
announce, to the driver, manipulations required during parking of the vehicle at the target position, through the interface,

wherein, when the vehicle reaches the target position, the controller controls steering of the vehicle to position the vehicle
at a center of the target position, based on information related to situations at the front and rear sides of the vehicle
sensed by the obstacle sensor,

wherein, when the vehicle reaches the target position, the controller turns a steering wheel of the vehicle back to an original
position thereof, calculates distances between the vehicle and the obstacles positioned at the front side and the rear side
of the vehicle based on the result of sensing by the obstacle sensor when the steering wheel is turned back to the original
position, determines whether the vehicle is off the center of the target position based on the calculated distances, and controls
steering of the vehicle to position the vehicle at the center of the target position if the vehicle is off the center of the
target position.

US Pat. No. 9,139,226

METHOD, APPARATUS, AND SYSTEM FOR PARKING CONTROL

MANDO CORPORATION, Pyeon...

1. A parking control apparatus comprising:
a parking control start signal input unit for receiving a parking control start signal through a parking control switch;
a detection control unit for controlling such that, if the parking control start signal is input, while a vehicle is moving,
a left area and a right area are detected through a left ultrasonic sensor and a right ultrasonic sensor and a left image
for the left area and a right image for the right area are photographed through at least one camera;

a parking mode determining unit for determining whether an available parking area is located on a left or right side of the
vehicle and whether the vehicle is to be parked at a right angle or in parallel based on left ultrasonic data and the left
image for the left area and right ultrasonic data and the right image for the right area, and determining a parking mode for
parking the vehicle in the parking area according to the determination result;

a parking path calculating unit for calculating a parking path along which the vehicle is moved to be parked, according to
the determined parking mode; and

a vehicle control instruction output unit for outputting a vehicle control instruction for controlling and automatically moving
the vehicle to the parking area along the parking path,

wherein the parking mode determining unit acquires information on a distance between the vehicle and an obstacle in the left
area from the left ultrasonic data and recognizes existence of the obstacle in the left area and a type of the obstacle through
an image analysis of the left image to determine whether the parking area is located on the left side of the vehicle, and
acquires information on a distance between the vehicle and an obstacle in the right area from the right ultrasonic data and
recognizes existence of the obstacle in the right area and a type of the obstacle through an image analysis of the right image
to determine whether the parking area is located on the right side of the vehicle, and if it is determined that parking areas
are located on both left and right sides of the vehicle, after a size of the parking area located on the left side is calculated
from a distance between the obstacles through the left ultrasonic data and a size of a parking area located on the right side
is calculated from a distance between the obstacles through the right ultrasonic data, the size of the parking area located
on the left side and the size of the parking area located on the right side are compared with each other to determine the
larger parking area as a parking area.

US Pat. No. 9,114,823

ACTUATING DEVICE EMPLOYED IN STEERING SYSTEM FOR VEHICLE

MANDO CORPORATION, Pyeon...

1. An actuating device employed in a steering system for a vehicle, comprising:
an input-side sun gear provided on an input shaft of a steering shaft and rotated integrally with the input shaft of the steering
shaft;

an output-side sun gear provided on an output shaft of the steering shaft and rotated integrally with the output shaft of
the steering shaft;

an input-side planetary gear, which is externally engaged with the input-side sun gear, revolves around the input-side sun
gear, and is provided on a planetary gear shaft; and

an output-side planetary gear, which is externally engaged with the output-side sun gear, revolves around the output-side
sun gear, and is provided on the planetary gear shaft, the output-side planetary gear being spaced a certain distance apart
from the input-side planetary gear,

wherein the planetary gear shaft, on which the input-side planetary gear and the output-side planetary gear are provided,
is supported by a bearing at a portion of the planetary gear shaft positioned between respective portions at which the input-side
planetary gear and the output-side planetary gear are provided in a longitudinal direction of the planetary gear shaft,

wherein the input shaft of the steering shaft passes rotatably through a first plate section, and
wherein a worm wheel is placed on an outer circumference of the first plate section.

US Pat. No. 9,091,337

REDUCER OF ELECTRIC POWER STEERING APPARATUS

MANDO CORPORATION, Pyeon...

1. A reducer of an electric power steering apparatus adapted to absorb vibrations and noise generated when a worm shaft is
moved in an axial direction thereof or resiliently deformed at a certain angle from the axial direction, comprising:
a guide configured to axially support a worm shaft bearing coupled to an end of a worm shaft opposite to a coupling portion
of a motor shaft;

a guide damper coupled to the guide and configured to provide the guide with an axial resilient force; and
an adjusting plug coupled to one side of a gear housing so as to pass through the gear housing and configured to adjust a
support force of the guide damper while axially supporting the guide damper.

US Pat. No. 10,093,297

APPARATUS AND METHOD FOR CONTROLLING ELECTRIC PARKING BRAKE

MANDO CORPORATION, Gyeon...

1. An apparatus for controlling a parking brake, comprising:a sensing apparatus sensing a current disk temperature in real time;
a calculation unit calculating the current disk temperature using a temperature increase model associated with brake-frictional energy and a temperature cooling model associated with a convective process of an ambient temperature, and calculating, when the parking brake is clamped to park, based on the sensed or calculated current disk temperature, a current parking force loss amount after parking according to the sensed or calculated current disk temperature in real time;
a determination unit determining whether the calculated current parking force loss amount is out of a preset reference parking force loss amount range; and
a driving unit re-clamping, when the current parking force loss amount is out of the reference parking force loss amount range, the parking brake according to a target parking force range preset in the calculation unit,
wherein the temperature increase model considers at least one of frictional energy, a friction factor of a brake pad, a wheel pressure, a brake cylinder, wheel speed, a circumference of a disk, a circumference of a wheel, a heating temperature ratio, a heat absorbing factor, mass of the disk and heat of the disk, and wherein the temperature cooling model considers a cooling temperature ratio, an effective radius, a heat transfer coefficient of a convection current, a disk temperature, an ambient temperature, the mass of the disk, the heat of the disk, a wheel radius, a heat transfer ratio of air, a convective factor, a kinematic viscosity coefficient and speed.

US Pat. No. 9,656,646

INTEGRATED ELECTRO-HYDRAULIC BRAKE SYSTEM

MANDO CORPORATION, Gyeon...

1. An integrated electro-hydraulic brake system, comprising:
a power source unit including an accumulator configured to store a pressure of a predetermined level, a pump configured to
suck oil from a reservoir and discharge the oil to the accumulator in order to generate a pressure in the accumulator, and
a motor configured to drive the pump;

an integrated hydraulic control device including a master cylinder having two hydraulic circuits and configured to generate
a hydraulic pressure, the reservoir connected above the master cylinder and configured to store oil, an in-valve and an out-valve
configured to control a pressure delivered from the accumulator to a wheel cylinder installed in each wheel, a shut off valve
configured to control a fluid pressure delivered from the master cylinder to the wheel cylinder, a pedal simulator connected
to the master cylinder and configured to provide a reaction force of a brake pedal, and a simulation valve installed in a
rear end of the pedal simulator; and

a control valve disposed in a connection passage connecting the out-valve and the reservoir and configured to perform control
such that the fluid pressure flowing through the out-valve flows to the reservoir,

wherein the control valve is provided as the normally close type-solenoid valve that normally maintains a close state in order
to prevent the fluid pressure generated from the master cylinder from flowing to the reservoir when the integrated electro-hydraulic
brake system abnormally operates, and

wherein the out-valve is provided as a normally open type-solenoid valve that normally maintains an open state in order to
reduce heat generation.

US Pat. No. 9,683,873

TORQUE SENSOR COVER

MANDO CORPORATION, Gyeon...

1. A torque sensor cover comprising:
a first cover surrounding a steering shaft to which a torque sensor is coupled and having a through-hole through which an
electric wire connected to the torque sensor passes at one side thereof;

a support member coupled to and supported by an inner peripheral surface of the through-hole of the first cover and having
a hole through which the electric wire passes; and

a second cover detachably coupled to the first cover, axially pressing and supporting the support member,
wherein a guide protrusion protruding outwards is formed at a periphery of the through-hole of the first cover,
wherein the second cover comprises an inner body inserted into the guide protrusion, for axially pressing the support member,
and an outer body spaced outwards from the inner body and surrounding an outer peripheral surface of the guide protrusion,

wherein a coupling boss is formed on an outer peripheral surface of the guide protrusion, and
wherein a coupling hole into which the coupling boss is inserted to be coupled to the coupling hole is further formed in the
outer body.

US Pat. No. 9,580,053

SIGNAL PROCESSING APPARATUS FOR WHEEL SPEED SENSOR

MANDO CORPORATION, Pyeon...

1. A signal processing apparatus for a wheel speed sensor, comprising:
a sensor input terminal unit to which a sensing signal of a wheel speed sensor is input; and
a normality determination block determining whether or not the sensing signal is normal,
wherein the sensor input terminal unit protects a circuit therein by detecting that the wheel speed sensor is erroneously
connected to a battery, and

wherein the normality determination block determines a difference between a level detection time of a rising edge or a falling
edge and a level detection time after detection of the rising edge or falling edge using at least one of a fixed timing synchronization
algorithm, an adaptive timing synchronization algorithm, and a timing tracking circuit.

US Pat. No. 9,523,411

PLANETARY GEAR REDUCER FOR VEHICLULAR STEERING APPARATUS

MANDO CORPORATION, Gyeon...

1. A planetary gear reducer for a vehicular steering apparatus, the planetary gear reducer comprising:
a sun gear, to which a steering shaft is joined;
a planetary gear circumscribing the sun gear;
a carrier, to which a rotary shaft of the planetary gear is joined;
a ring gear, in which the planetary gear is inscribed; and
one or more backlash compensation members coupled to each of the sun gear, the planetary gear, and the ring gear such that
the backlash compensation members are rotated in a state where the backlash compensation members are in close contact with
each other.

US Pat. No. 9,520,063

PARKING CONTROL APPARATUS, PARKING CONTROL METHOD AND PARKING CONTROL SYSTEM

Mando Corporation, Pyeon...

1. A parking control apparatus comprising:
a space search unit configured to search a space to park a vehicle;
a searched space management unit configured to allocate identification information to the searched space; and
a parking space selection unit configured to select the searched space as a parking space to actually park the vehicle,
wherein the space search unit searches for another space to park the vehicle when the searched space is not selected,
wherein the identification information is allocated to correspond to each of the searched spaces,
wherein the identification information is at least one of an identification number which is allocated to at least one of the
searched spaces in order based on the searched order of the searched spaces, and

wherein the searched space management unit performs a control such that space images for the searched spaces are displayed
on separate screen pages of a display apparatus as the vehicle moves and performs a control such that each of the identification
information allocated to correspond to each of the searched spaces is further displayed on the display apparatus in a corresponding
screen page.

US Pat. No. 9,469,343

SYSTEM, METHOD, AND COMPUTER-READABLE RECORDING MEDIUM FOR LANE KEEPING CONTROL

MANDO CORPORATION, Pyeon...

1. A lane keeping control system, comprising:
a fault detection device including:
a lane parameter generation unit that generates a relative position between a lane and a vehicle as a lane parameter, based
on information received from a camera installed on the vehicle;

a vehicle state information reception unit that receives vehicle state information sensed or measured by each vehicle sensor
or device installed on the vehicle;

an equivalent model generation unit that
receives the lane parameter from the lane parameter generation unit,
receives the vehicle state information from the vehicle state information reception unit,
analyzes a time flow-related correlation between the vehicle parameter and the vehicle state information, and
generates an equivalent model based on the analyzed time flow-related correlation;
an erroneous detection determination unit that determines and classifies an erroneous detection of a lane parameter by simultaneously
analyzing a case, in which a difference occurs from the equivalent model generated by the equivalent model generation unit,
for each of at least one error; and

a torque control factor adjustment unit that adjusts a torque control factor according to a preset torque control factor adjustment
setup so as to suppress or reduce the influence of erroneous torque when the erroneous detection determination unit determines
the erroneous detection.

US Pat. No. 9,443,684

CHARGING AND DISCHARGING CONTROL APPARATUS OF DC LINK CAPACITOR IN ELECTRIC POWER STEERING RELAY AND METHOD THEREOF

MANDO CORPORATION, Pyeon...

1. A charging-discharging control apparatus of a DC link capacitor in an electric power steering relay, comprising:
a DC link capacitor configured to turn-on the electric power steering relay by charging an electric charge, a first switching
unit configured to control charging of the DC link capacitor by being shorted between the DC link capacitor and a power supply
unit; and a second switching unit configured to control discharging of the DC link capacitor by being shorted between the
DC link capacitor and a ground,

wherein the first switching unit includes at least one transistor to control the charging of the DC link capacitor using a
collector current thereof, and

the second switching unit includes at least one transistor to control the discharging of the DC link capacitor using a collector
current thereof,

wherein the first switching unit includes:
a first transistor configured to be connected to the power supply unit through a first resistor; and
a second transistor configured to be connected to the first transistor through a second resistor to control a current flowing
in the DC link capacitor from the power supply unit using the first transistor, and

wherein the second switching unit includes:
a third transistor configured to be connected to the DC link capacitor through a third resistor; and
a fourth transistor configured to be connected to the third transistor through a fourth resistor to control a current flowing
in the ground from the DC link capacitor using the third transistor.

US Pat. No. 9,228,632

DAMPING FORCE VARIABLE SHOCK ABSORBER HAVING ADDITIONAL VALVE INSTALLED IN ROD GUIDE

MANDO CORPORATION, Pyeon...

1. A damping force variable shock absorber comprising:
a base shell having an upper opening;
a damping force variable valve assembly attached to an outside of the base shell;
an inner tube within the base shell;
a piston rod within the inner tube, the piston rod being movable in a length direction of the inner tube;
a piston valve connected to one end of the piston rod, wherein the piston valve partitions an internal space of the inner
tube into a rebound chamber and a compression chamber;

a separator tube within a space between the inside of the base shell and the inner tube, wherein the separator tube partitions
the space between the inside of the base shell and the inner tube into a low-pressure chamber and a high-pressure chamber;

a rod guide, the upper opening of the base shell being closed by the rod guide; and
an amplitude selective valve inside the rod guide, the amplitude selective valve comprising:
an operating chamber within the rod guide;
a first passage within the rod guide, the rebound chamber being communicatively coupled with the operating chamber by way
of the first passage;

a second passage within the rod guide, the high-pressure chamber being communicatively coupled with the operating chamber
by way of the second passage; and

a free piston within the operating chamber, the free piston being movable in the length direction of the inner tube based
on an amplitude of an input shock,

wherein the amplitude selective valve and the damping force variable valve assembly are installed on a serial passage between
the rebound chamber and the low-pressure chamber.

US Pat. No. 9,911,051

METHOD AND APPARATUS FOR CONFIRMATION OF RELEVANT WHITE INNER CIRCLE IN ENVIRONMENT OF CIRCULAR TRAFFIC SIGN RECOGNITION

MANDO CORPORATION, Gyeon...

1. An apparatus for confirming circular traffic sign recognition, comprising:
an image acquisition unit configured to photograph a front of a vehicle using a camera to acquire a front image;
a sign recognition unit detecting circular shapes indicating circles of objects in the front image, classifying traffic sign
circles indicating a traffic sign for the circles, and recognizing the circular traffic sign; and

a control unit confirming the circular traffic sign recognition using a white inner circle and informing a driver of contents
of the confirmed circular traffic sign.

US Pat. No. 9,611,912

BODY VALVE ASSEMBLY FOR SHOCK ABSORBER

MANDO CORPORATION, Pyeon...

1. A body valve assembly for a shock absorber, comprising:
a cylinder divided into an inner cylinder and an outer cylinder such that a reservoir chamber is formed therebetween;
a valve body which is installed in a lower end of the inner cylinder and includes at least one compression passage allowing
a working fluid to flow from the inner cylinder to the reservoir chamber during a compression stroke and at least one rebound
passage allowing the working fluid to flow from the reservoir chamber to the inner cylinder during a rebound stroke;

a body retainer which is disposed under the valve body and spaced apart from the valve body and includes at least one compression
communication passage so as to be connected to the compression passage;

a pilot chamber which is formed to have a recessed space on a top surface of the body retainer and communicates with a lower
end of the compression passage and an upper end of the compression communication passage;

a pilot valve which is disposed between the valve body and the body retainer, the pilot valve being simultaneously opened
to communicate the lower end of the compression passage with the reservoir chamber when the working fluid moves to the pilot
chamber during a low-speed compression stroke; and

a main valve module which is closed in a state of coming into close contact with a bottom surface of the body retainer during
the low-speed compression stroke, and is opened when a pressure of the pilot chamber is above a set pressure range during
a high-speed compression stroke, so that the compression communication passage communicates with the reservoir chamber,

wherein the valve body includes:
a body which is installed in an inner lower end of the inner cylinder and has the compression passage formed circumferentially
in a ring shape and the rebound passage formed circumferentially in a ring shape around the compression passaged and spaced
apart from the compression passage; and

a connection passage which is cut along a lower edge of the body in a horizontal direction at a lower end of the rebound passage
to allow communication between the lower end of the compression passage and the reservoir chamber, which is formed between
the inner cylinder and the outer cylinder, via the rebound passage when the pilot valve is opened, and

wherein an inner periphery of the connection passage communicates the lower end of the compression passage with the reservoir
chamber by the opening of the pilot valve during a compression stroke, and communicates the reservoir chamber with a lower
end of the rebound stroke during a rebound stroke.

US Pat. No. 9,517,793

METHOD OF PREVENTING OVER STROKE IN REAR-WHEEL STEERING SYSTEM AND LINEAR SENSOR APPLIED THERETO

MANDO CORPORATION, Pyeon...

1. A method of preventing over stroke in a rear-wheel steering system, comprising:
determining whether a linear sensor which moves in conjunction with a lead screw enters preliminary sections A of a stroke
section a; and

restricting the movement of the lead screw when the linear sensor enters the preliminary sections A.

US Pat. No. 9,296,367

BRAKE APPARATUS FOR ELECTRIC CORNER MODULE

MANDO CORPORATION, Pyeon...

1. A brake apparatus for an electric corner module (ECM), the brake apparatus comprising:
a housing 100 having accommodation portions 110;

a shaft 200, of which both ends are accommodated in the accommodation portions 110 of the housing 100;

a planet gear 300 connected to the shaft 200; and

a driving unit 400 that transmits power to the shaft 200, moves the planet gear 300 in an axial direction and induces friction between the housing 100 and the planet gear 300.

US Pat. No. 9,463,784

ELECTRONIC PARKING BRAKE SYSTEM

Mando Corporation, Pyeon...

1. An electronic parking brake (EPB) system comprising an EPB actuator, having a motor, to operate the motor to generate parking
brake force with respect to a wheel, the EPB system comprising:
a test device connected to the EPB actuator to test a function, performance, or breakdown of the EPB actuator, the test device
comprising:

a connection cable provided at one side of a main body of the test device such that the connection cable is electrically connected
to the EPB actuator;

a diagnosis switch provided at a front of the main body to allow a user to input a diagnosis command for the EPB actuator;
a diagnosis lamp provided at the front of the main body to indicate whether the EPB actuator has broken down;
a test device battery mounted in the main body to supply power for diagnosis to test the EPB actuator;
a power cable provided at the other side of the main body and connected to a vehicle battery; and
a parking application button for a parking application mode and a parking release button for a parking release mode provided
at the front of the main body,

wherein when the diagnosis switch is input, the test device supplies power from the test device battery to the EPB actuator
to diagnose whether the EPB actuator is abnormal and the diagnosis lamp is turned on or off based on the diagnosis result,
and

wherein when the parking application button is turned on by the user, the test device controls the EPB actuator to execute
the parking application mode so that power is supplied from the vehicle battery via the power cable and controls the EPB actuator
to execute the parking release mode when the parking release button is turned on by the user.

US Pat. No. 9,383,279

INSTALLATION STRUCTURE FOR PEDAL STROKE SENSOR

MANDO CORPORATION, Pyeon...

1. An installation structure of a pedal stroke sensor configured to measure a displacement of a moving member interworking
according to a stepping force of a brake pedal,
wherein the pedal stroke sensor provided with a sensing member to sense a change in displacement according to movement of
the moving member in a non-contact manner is installed at an outside of a housing that allows the moving member to be slid
thereinto;

the sensing member is provided with a sensor housing that is detachably installed at the outside of the housing, a hall IC
(integrated circuit) provided in the sensor housing to sense change in magnetic force, and a magnet housing provided in the
sensor housing so as to move while facing the hall IC and on which a magnet is installed; and

an elongated hole is formed through an outer surface of the housing in a direction in which the moving member moves, and the
moving member is connected to the magnet housing by using a connecting member such that the moving member moves together with
the magnet housing through the elongated hole.

US Pat. No. 9,080,623

ELECTROMECHANICAL BRAKE SYSTEM

MANDO CORPORATION, Gyeon...

1. An electromechanical brake system comprising:
a base carrier provided with a pair of pad plates for application of pressure to a disc, the pad plates installed to be movable
forward and backward;

a caliper housing supported by the base carrier to be movable forward and backward to apply pressure to the pad plates;
a pressing member including a ball nut installed at the caliper housing to convert rotational motion into rectilinear motion
to apply pressure to the pad plates and a ball screw coupled to the ball nut;

a force sensor installed at the ball nut to sense load produced by operation of the ball nut;
a motor to produce rotational force to operate the pressing member; and
a speed reducer connected to a rotating shaft of the motor to transfer driving force to the pressing member,
wherein the speed reducer is adapted to change a reduction ratio depending on presence of the load sensed by the force sensor,
wherein the speed reducer comprises:
a sun gear installed at the rotating shaft of the motor;
a plurality of planetary gears disposed around the sun gear to be engaged with the sun gear;
a carrier to rotate the ball screw connected to the planetary gears; and
an internal gear unit to amplify rotational force of the motor by being engaged with the planetary gears or to transfer the
rotational force to the ball screw without change in a reduction ratio,

wherein the internal gear unit comprises:
a first internal gear fixed to an outside of the planetary gears;
a second internal gear spaced from the first internal gear and engaged with the planetary gears and the carrier; and
a shifting member provided at the first internal gear to move the second internal gear forward or backward depending on presence
of load sensed by the force sensor, and

wherein the second internal gear moves forward or backward to be engaged with the planetary gears and the carrier to transfer
rotational force or to be placed between and engaged with the planetary gears and the first internal gear to amplify the rotational
force.