Idle speed control system for internal combustion engine

Details Idle speed control system for internal combustion engine Idle speed control system for internal combustion engine

1993-03-24

1993-11-30

Wolfe, Willis R.

Internal-combustion engines

Engine speed regulator

Idle speed control

F02D 4116

Patent

active

052655717

ABSTRACT:
An engine idle speed control system is designed to perform a transient correction in order to prevent an idle engine speed of an internal combustion engine from being made unstable by a load of an auxiliary unit, such as an air conditioner of a vehicle. The idle speed control system comprises an idle control valve provided in a bypass passage bypassing a throttle valve disposed in an intake passage of the engine, and a controller for controlling the idle engine speed by manipulating the opening degree of the idle control valve. The controller increases the opening degree of the idle control valve transiently when the load of the auxiliary unit is applied, and then decreases the opening degree with passage of time.

REFERENCES:
patent: 4562808 (1986-01-01), Tominaga et al.
patent: 4748951 (1988-06-01), Manaka et al.
patent: 4753202 (1988-06-01), Hasebe et al.
patent: 4836164 (1989-06-01), Morozumi et al.
patent: 5065717 (1991-11-01), Hosokai et al.
patent: 5153446 (1992-10-01), Shimomura

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