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AssigneeDelphi Technologies, Inc.
InventorsDennis C. Reed, Martin Muller, Edward George Himes, Bart Hubert Schreurs, Joon-Ho Yoo
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A method of improving the operating characteristics of an internal combustion engine equipped with electronic throttle control employs variable cam timing to vary the phasing of the intake valves and/or exhaust valves so as to achieve lower feed gas emissions and improved fuel economy while delivering as closely as possible the desired torque. The method can be implemented using a fuel-lead strategy or an air-lead strategy. Whenever a change is requested in the amount of torque, the method responds by adjusting the amount of fuel flow, the spark timing, the position of the throttle and/or the positions of the intake valves and/or the exhaust valves so as to deliver the desired torque. The method adjusts those operating parameters in a way that improves the ability of the engine to deliver the desired torque, produce less feed gas emissions, idle more stably, and consume less fuel.
A method of improving the operating characteristics of an internal combustion engine equipped with an electronically controlled throttle, a fuel injector and a variable valve timing mechanism, said variable valve timing mechanism being used to control the timing of at least one of intake valves and exhaust valves of said engine, said method comprising the repeated performance of at least the following steps:
Dependencies are inferred from the claim text.