System for detecting functional abnormalities of idle speed cont

Details System for detecting functional abnormalities of idle speed cont System for detecting functional abnormalities of idle speed cont

1997-07-07

1999-08-10

Chilcot, Richard

Measuring and testing

Vehicle chassis

Steering

731181, G01M 1500

Patent

active

059361522

ABSTRACT:
Detection of abnormalities of an idle speed control system is performed based on whether a deviation of an on-idle engine speed from a target engine speed is within a critical range which is changed so as to make the idle speed control system harder to be judged abnormal when the engine is in a lapped state where the engine is apt to change speed than when in a green state where the engine is hardly changeable in speed.

REFERENCES:
patent: 4344399 (1982-08-01), Matsumura et al.
patent: 4747379 (1988-05-01), Oba
patent: 5408871 (1995-04-01), Lieder et al.
patent: 5511412 (1996-04-01), Campbell, III et al.
patent: 5614666 (1997-03-01), Hara et al.
patent: 5715726 (1998-02-01), Matsumoto et al.

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