Method of feedback-controlling idling speed of internal combusti

Details Method of feedback-controlling idling speed of internal combusti Method of feedback-controlling idling speed of internal combusti

1985-01-22

1986-02-18

Argenbright, Tony M.

Internal-combustion engines

Engine speed regulator

Idle speed control

123585, F02M 307

Patent

active

045705925

ABSTRACT:
A method of feedback controlling idling speed in an internal combustion engine having an intake air amount control unit for controlling the amount of air intake. During an idling operation, the intake air amount control unit is feedback controlled as a function of the deviation of actual engine speed from a target engine speed, and when the engine speed becomes lower than a predetermined speed while said engine is decelerating, the intake air amount control unit is set to an initial value prior to or at the start of the feedback control. The method includes the steps of detecting the engine speed; detecting the rate of deceleration of the engine when the detected engine speed becomes lower than the predetermined speed while the engine is decelerating; and setting the initial value of the intake air amount control unit as a function of the rate of deceleration. The intake air amount control unit is maintained at the initial value during the period of time from when the engine speed becomes lower than the predetermined speed to when feedback control starts.

REFERENCES:
patent: 4465043 (1984-08-01), Denz et al.
patent: 4491107 (1985-01-01), Hasegawa et al.
patent: 4508074 (1985-04-01), Yamato et al.
patent: 4524738 (1985-06-01), Chastagner

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