Intensive self-diagnosing system for engine exhaust gas control

Details Intensive self-diagnosing system for engine exhaust gas control Intensive self-diagnosing system for engine exhaust gas control

1994-03-10

1995-10-31

Moulis, Thomas N.

Internal-combustion engines

Charge forming device

Having fuel vapor recovery and storage system

123690, F02M 2508

Patent

active

054620341

ABSTRACT:
Malfunction of a purge air control system is checked based on a variation of a fuel tank inner pressure or an air-fuel ratio in response to forced introduction of purge air into an engine. During a mode of checking malfunction of the purge air control system, failure/malfunction checks on other exhaust gas control components/systems, such an ignition system, an O.sub.2 sensor and a fuel supply system, are prohibited.

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patent: 5331560 (1994-07-01), Tamura

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