Method and apparatus for controlling idling speed of internal co

Details Method and apparatus for controlling idling speed of internal co Method and apparatus for controlling idling speed of internal co

1985-08-08

1986-07-29

Dolinar, Andrew M.

Internal-combustion engines

Engine speed regulator

Idle speed control

123489, 123589, F02D 4116

Patent

active

046026010

ABSTRACT:
A method for controlling the rotational speed of an internal combustion engine in the idling state, including the steps of detecting an intake air flow rate in the engine and an air-fuel ratio of the engine and supplying the results of the decisions to a control circuit. The method includes the steps of generating output signals from the control circuit for generating the air flow rate and fuel injection amount, regulating the air flow rate while the engine is in an idling state, and regulating the fuel injection amount from a fuel injector in the engine. The method further includes the step of regulating the air flow rate while the engine is in an idling state and regulating the fuel injection amount from a fuel injector. The generation of the output signals from the control circuit is carried out by the steps of calculating an instruction output of the fuel injection amount, obtaining an air-fuel ratio closed-loop correction value, carrying out learning control for an air-fuel ratio learning correction value, deciding whether or not the engine is running under low atmospheric pressure on the basis of a comparison between the air fuel ratio learning correction value and a predetermined value, and changing the intake air flow rate for the idling state from the decision.

REFERENCES:
patent: 4224910 (1980-09-01), O'Brien
patent: 4240390 (1980-12-01), Takeda
patent: 4501240 (1985-02-01), Aono
patent: 4522176 (1985-06-01), Takao et al.

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