Diagnosis apparatus for evaporation system

Details Diagnosis apparatus for evaporation system Diagnosis apparatus for evaporation system

1997-12-15

2000-07-18

Noori, Max

Measuring and testing

Vehicle chassis

Steering

73116, 123520, G01L 326

Patent

active

060890800

ABSTRACT:
A diagnosis apparatus for an evaporation system, and particularly, in an evaporation system having a gauge valve in the evaporation system without being affected by a change in internal pressure of the evaporation system, a residual amount of fuel in a fuel tank and an atmospheric density. The diagnosis apparatus is capable of precisely diagnosing the evaporation system even in the case where dirt or stain or the like adheres to the gauge valve and an air cleaner. A gauge pipe is branched between a fuel tank and a purge valve and opened to an intake pipe or atmosphere, and a gauge valve is arranged in the gauge pipe. A state detector is provided for detecting the state of a gauge system comprising the gauge valve and the gauge pipe, and a correcting feature corrects the results of diagnosis by abnormality determination apparatus on the basis of the results of detection by the state detector.

REFERENCES:
patent: 5651351 (1997-07-01), Matsumoto et al.
patent: 5679890 (1997-10-01), Shinohara et al.
patent: 5680849 (1997-10-01), Morikawa et al.
patent: 5765539 (1998-06-01), Isobe et al.
patent: 5765540 (1998-06-01), Ishii et al.

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