US Patent No. 10,830,166

NOISE, VIBRATION AND HARSHNESS REDUCTION IN A SKIP FIRE ENGINE CONTROL SYSTEM


Patent No. 10,830,166
Issue Date November 10, 2020
Title Noise, Vibration And Harshness Reduction In A Skip Fire Engine Control System
Inventorship Louis J. Serrano, Los Gatos, CA (US)
Xin Yuan, Palo Alto, CA (US)
John W. Parsels, San Jose, CA (US)
Mohammad R. Pirjaberi, San Jose, CA (US)
Mark A. Wilcutts, Berkeley, CA (US)
Masaki Nagashima, Pacific Grove, CA (US)
Assignee Tula Technology, Inc., San Jose, CA (US)

Claim of US Patent No. 10,830,166

1. A method for operating a hybrid powertrain having an internal combustion engine and an energy storage/release device, wherein both the internal combustion engine and the energy storage/release device can deliver torque to the hybrid powertrain, the method comprising:determining an output torque request for the hybrid powertrain;
controlling the internal combustion engine and energy storage/release device so as to meet the torque request; and
using the energy storage/release device to provide a smoothing torque to at least partially cancel hybrid powertrain torque oscillations generated by the internal combustion engine;
wherein a DC term is added to the smoothing torque, wherein energy costs are considered in determining the smoothing torque,
wherein the DC term can have either sign such that the energy storage/release device can store energy from the hybrid powertrain or release energy to the hybrid Powertrain.