Failure diagnosis apparatus for evaporative fuel processing...

Details Failure diagnosis apparatus for evaporative fuel processing... Failure diagnosis apparatus for evaporative fuel processing...

2006-05-09

2006-05-09

Moulis, Thomas (Department: 3747)

Internal-combustion engines

Charge forming device

Having fuel vapor recovery and storage system

C123S1980DA

Reexamination Certificate

active

07040302

ABSTRACT:
A failure diagnosis apparatus for diagnosing a failure of an evaporative fuel processing system. A pressure in the evaporative fuel processing system is detected, and a purge control valve and a vent shut valve are closed when stoppage of the engine is detected. A determination is made as to whether there is a leak in the evaporative fuel processing system based on the detected pressure during a predetermined determination period after closing of the purge control and vent shut valves.

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patent: 2002-357164 (2002-12-01), None

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