Method of tank leak diagnosis

Details Method of tank leak diagnosis Method of tank leak diagnosis

2005-11-29

2005-11-29

Black, Thomas G. (Department: 3661)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Vehicle diagnosis or maintenance indication

C073S049700, C073S040000, C073S04050R, C123S518000

Reexamination Certificate

active

06970775

ABSTRACT:
A method of tank leak diagnosis in a tank ventilation device including a fuel tank which is connected at least indirectly through a storage and tank ventilation valve with a suction pipe of an internal combustion engine of the vehicle, with the storage having an aeration conduit with a check valve, includes performing a tank leak diagnosis by a negative pressure after turning off of the internal combustion engine; and producing the negative pressure in the fuel tank immediately before the turning off of the internal combustion engine.

REFERENCES:
patent: 2002/0139173 (2002-10-01), Kano et al.
patent: 198 30 234 (2000-01-01), None

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