Device for detecting leakage of fuel vapor

Details Device for detecting leakage of fuel vapor Device for detecting leakage of fuel vapor

1996-03-18

1997-10-07

Brock, Michael

Measuring and testing

With fluid pressure

Leakage

73 492, 73 497, G01M 332, G01M 326

Patent

active

056750730

ABSTRACT:
A device for detecting leakage of fuel vapor including a pressure sensor which is arranged in a fuel vapor conduit connected to the fuel tank. The pressure sensor detects the pressure inside the fuel tank. It is judged that the fuel vapor has not leaked from the fuel tank or the fuel vapor conduit before the engine is stopped based on the pressure inside the fuel tank detected by the pressure sensor and it is judged that the reattachment of the fuel cap has been forgotten when it is judged that the fuel vapor is leaking from the fuel tank when the operation of the engine is restarted after stopping of the engine.

REFERENCES:
patent: 4583072 (1986-04-01), Matsushita
patent: 5408866 (1995-04-01), Kawamura et al.
patent: 5451927 (1995-09-01), Thompson
patent: 5467641 (1995-11-01), Williams et al.

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