Leakage diagnosis apparatus for fuel vapor purge system and...

Details Leakage diagnosis apparatus for fuel vapor purge system and... Leakage diagnosis apparatus for fuel vapor purge system and...

2007-05-22

2007-05-22

Williams, Hezron (Department: 2856)

Measuring and testing

With fluid pressure

Motor part or auxiliary

C073S049200

Reexamination Certificate

active

10851139

ABSTRACT:
In a fuel vapor purge system, a blocked diagnosis zone is pressurized by an air pump, a pressure in the diagnosis zone at the time when the diagnosis zone is pressurized, and an occurrence of leakage in the diagnosis zone is judged based on the comparison between a curvature of a change curve of the pressure and a threshold.

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