Leak detecting apparatus and fuel vapor treatment apparatus

Details Leak detecting apparatus and fuel vapor treatment apparatus Leak detecting apparatus and fuel vapor treatment apparatus

2006-04-11

2008-12-30

Gimie, Mahmoud (Department: 3747)

Internal-combustion engines

Charge forming device

Having fuel vapor recovery and storage system

C123S1980DA

Reexamination Certificate

active

07469686

ABSTRACT:
A leak detecting apparatus includes a canister adsorbing a fuel vapor evaporated in a fuel tank, a measure passage, a pump connected with the canister through the measure passage, and a pressure senor detecting a pressure in the measure passage. The pump depressurizes the measure passage, the canister, and the fuel tank so that a leakage of the fuel vapor is detected. When a blow-by of the fuel vapor is arisen, the pump is stopped to forcibly terminate a depressurization.

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patent: 6-101534 (1994-04-01), None

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