Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1997-03-24
1998-05-26
Nelli, Raymond A.
Internal-combustion engines
Charge forming device
Fuel injection system
F02P 500
Patent
active
057552053
ABSTRACT:
An engine control system in which an air fuel ratio (A/F) is controlled to a lean value closer to a stable combustion limit than a theoretical air fuel ratio under a predetermined operating range, comprising base air fuel ratio control element for setting a target air fuel ratio close to the stable combustion limit and for setting a base air fuel ratio control gain so as to accomplish the target air fuel, a combustion condition judging element for judging a combustion condition of each of cylinders of the engine, air fuel ratio compensating element for compensating the air fuel control gain based on the combustion condition judging element and ignition timing control means for setting an ignition timing in accordance with the target air fuel ratio in the predetermined operating range and for compensating the ignition timing taking account of the compensation of the air fuel ratio by the air fuel ratio compensating element. An accurate and reliable A/F control along with the ignition timing control can be accomplished to improve the fuel consumption efficiency and emission performance.
REFERENCES:
patent: 5213080 (1993-05-01), Lambert et al.
patent: 5383432 (1995-01-01), Cullen et al.
patent: 5497328 (1996-03-01), Sugai et al.
patent: 5619968 (1997-04-01), Hillsberg et al.
Imada Michihiro
Nishimura Hirofumi
Taga Junichi
Watanabe Tomomi
Abrams Hugh A.
Mazda Motor Corporation
Nelli Raymond A.
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