Diagnostic system for idle speed control valve

Internal-combustion engines – Engine speed regulator – Idle speed control

Patent

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Details

731181, F02D 4122

Patent

active

055223630

ABSTRACT:
A diagnostic system for an idle speed control valve is constructed to determine abnormality of the idle speed control valve by detecting a variation in an intake air amount produced upon forced opening and closing operation of the idle speed control valve.

REFERENCES:
patent: 5408871 (1995-04-01), Lieder et al.

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