US Patent No. 10,662,883

INTERNAL COMBUSTION ENGINE AIR CHARGE CONTROL


Patent No. 10,662,883
Issue Date May 26, 2020
Title Internal Combustion Engine Air Charge Control
Inventorship Mark A. Shost, Northville, MI (US)
Matthew A. Younkins, San Jose, CA (US)
Assignee Tula Technology, Inc., San Jose, CA (US)

Claim of US Patent No. 10,662,883

1. A method of operating an internal combustion engine having a plurality of cylinders, each cylinder having at least one associated intake valve and an associated exhaust valve, the intake and exhaust valves being cam actuated, the method comprising:directing skip fire operation of the engine, wherein during the skip fire operation of the engine, at least one of the cylinders (i) is deactivated during selected skipped cylinder working cycles such that air is not pumped through the cylinder during the skipped cylinder working cycles, and (ii) selected active cylinder working cycles are fueled and fired, and (iii) the skipped and active working cycles are interspersed while the engine is operating at a first effective displacement; and
controlling the intake valves associated with at least two of the fired cylinder working cycles differently such that a first air charge associated with a first one of the cylinder working cycles is greater than a second air charge associated with a second one of the cylinder working cycles during a selected engine cycle in which neither the first or second cylinder working cycles are skipped, whereby the skipped working cycles, cylinder working cycles having the first air charge and cylinder working cycles having the second air charge are all interspersed while the engine is operating at the first effective displacement.