Control system for an engine
AssigneeMazda Motor Corporation
InventorsJunichi Taga, Michihiro Imada, Masayuki Kuroki, Masayuki Tetsuno, Kiyotaka Mamiya, Hirofumi Nishimura
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Abstract
An engine control system for a direct injection-spark ignition type of engine determines a target load based on an engine speed and an accelerator pedal travel, determines target air-to-fuel ratio based on an amount of intake air and the target engine load, and determines an amount of fuel injection based on the target air-to-fuel ratio, so as thereby to control engine output torque balancing the target engine load even during a transitional operating state.
Claims12
An engine control system for an engine equipped with a fuel injector for determining a target air-to-fuel ratio based on target loads established according to engine operating conditions and controlling said fuel injector to deliver fuel according to said target air-to-fuel ratio, said engine control system comprising:
- an intake air flow sensor operative to detect actual air charging efficiency;
- an engine speed sensor operative to detect an engine speed of said engine;
- a accelerator sensor operative to detect an accelerator pedal travel;
- and
- control means for determining a target load based on said engine speed and said accelerator travel, determining a target air-to-fuel ratio based on said actual air charging efficiency and said target load, and determining an amount of fuel injection based on said target air-to-fuel ratio and said actual air charging efficiency.
Dependencies are inferred from the claim text.