Idle control device for an internal combustion engine

Details Idle control device for an internal combustion engine Idle control device for an internal combustion engine

1990-05-01

1991-08-06

Nelli, Raymond A.

Internal-combustion engines

Engine speed regulator

Idle speed control

123585, F02M 300

Patent

active

050368125

ABSTRACT:
An idle control device for an internal combustion engine capable of controlling the idle speed of the engine in an appropriate manner over a wide operating range thereof and performing idle stabilization control when the engine operation is abnormal. In one embodiment, it is determined whether the engine is in a fast or a normal idling condition, and the number of engine rpm during fast idling is controlled to be at a target value which is higher than another target value for normal idling. In another embodiment, it is determined whether the operation of the engine is normal or abnormal, and the number of engine rpm is controlled to be at a target value when the operation of the engine is abnormal (i.e., the engine is likely to stall) even if the engine is erroneously determined to be out of idling due to sensor failure or the like.

REFERENCES:
patent: 4875447 (1989-10-01), Kiuchi et al.
patent: 4875456 (1989-10-01), Tomamaru
patent: 4877002 (1989-10-01), Shimomura et al.
patent: 4895118 (1990-01-01), Nakamura
patent: 4903658 (1990-02-01), Miyama et al.
patent: 4903659 (1990-02-01), Inagaki et al.

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