Apparatus and method for fuel vapor leak detection

Measuring and testing – With fluid pressure – Leakage

Reexamination Certificate

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C073S049700

Reexamination Certificate

active

06880383

ABSTRACT:
A fuel system with a pressure-sensitive monitor accumulates multiple pressure-related sample points and estimates the general trend of pressure change in a fuel system over time, thereby detecting the presence or absence of a fuel vapor leak in the fuel system.

REFERENCES:
patent: 4012944 (1977-03-01), Covington et al.
patent: 4670847 (1987-06-01), Furuse
patent: 4837707 (1989-06-01), Giometti et al.
patent: 5361622 (1994-11-01), Wall
patent: 5750888 (1998-05-01), Matsumoto et al.

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