Engine air-fuel ratio controller

Details Engine air-fuel ratio controller Engine air-fuel ratio controller

1996-03-05

1997-04-01

Nelli, Raymond A.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

F02D 4100

Patent

active

056156600

ABSTRACT:
A warmup fuel amount corresponding to a predetermined heavy fuel is set to control an air-fuel ratio of an air-fuel mixture supplied to an engine during warmup. A correction amount based on a difference between a post-warmup engine speed variation and a first reference value is stored, and a warmup fuel amount decreased by this correction is supplied to the engine on the next startup occasion. In this way the sensitivity of air-fuel ratio control during startup when fuels of different nature are used, is enhanced.

REFERENCES:
patent: 4509489 (1985-04-01), Hasegawa et al.
patent: 4682293 (1987-07-01), Goldenberg et al.
patent: 4694811 (1987-09-01), Bennett
patent: 5014670 (1991-05-01), Mitsumoto
patent: 5220904 (1993-06-01), Miyashita et al.
patent: 5253630 (1993-10-01), Akazaki et al.
patent: 5265581 (1993-11-01), Nagaishi
patent: 5558075 (1996-09-01), Maki et al.

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