Control system for automobile engine

Details Control system for automobile engine Control system for automobile engine

1997-06-19

1999-07-20

Wright, Dirk

Interrelated power delivery controls, including engine control

Transmission control

Engine controlled by transmission

123520, F02M 2508

Patent

active

059249560

ABSTRACT:
An idle speed control valve in a path bypassing an engine throttle valve is regulated in opening by feedback control and learning control in which a learned value depends upon a feedback control value to cause the engine to idle at a target speed of rotation. The determination of learned value is interrupted while a purge valve is remained open to purge fuel vapors into an air intake system for a specified period of time after detection of engine idling and resumed at a lapse of the specified period of time with interruption of on-idle fuel vapor purge. After the determination of learned value, the on-idle fuel vapor purge is resumed until an automatic transmission is shifted to, for instance, a drive range.

REFERENCES:
patent: 4381753 (1983-05-01), Yuzawa et al.
patent: 4862856 (1989-09-01), Yokoe et al.
patent: 5474049 (1995-12-01), Nagaishi et al.
patent: 5651351 (1997-07-01), Matsumoto et al.
patent: 5735255 (1998-04-01), Farmer et al.
patent: 5765541 (1998-06-01), Farmer et al.

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