Method for controlling the air/fuel ratio of an internal combust

Details Method for controlling the air/fuel ratio of an internal combust Method for controlling the air/fuel ratio of an internal combust

1986-12-24

1988-08-02

Dolinar, Andrew M.

Internal-combustion engines

Engine speed regulator

Responsive to deceleration mode

123589, F02D 4114

Patent

active

047608226

ABSTRACT:
A method for controlling an air/fuel ratio of an internal combustion engine. The fuel supply is performed normally by a feedback control operation for controlling the air/fuel ratio of the mixture toward a target air/fuel ratio in accordance with an oxygen concentration in an exhaust gas of the engine. A fuel cut operation under a predetermined condition includes a step for detecting a transition from the fuel cut operation to resume the fuel supply, and a step for shifting, for a time period after a detection of the transition, the target air/fuel ratio of the feedback control to a lean side with respect to a target air/fuel ratio value to be used after the elapse of the time period.

REFERENCES:
patent: 4186691 (1980-02-01), Takase et al.
patent: 4355618 (1982-10-01), Muller et al.
patent: 4648370 (1987-03-01), Kobayashi et al.
patent: 4697559 (1987-10-01), Suzuki et al.
patent: 4697567 (1987-10-01), Sawada et al.

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