Evaporated fuel treatment device for internal combustion engine

Details Evaporated fuel treatment device for internal combustion engine Evaporated fuel treatment device for internal combustion engine

2007-05-08

2007-05-08

Cygan, Michael (Department: 2855)

Measuring and testing

Simulating operating condition

Marine

Reexamination Certificate

active

11272794

ABSTRACT:
A sealing valve28that controls a communication state between a fuel tank10and a canister26is provided. During stop of an internal combustion engine, the sealing valve28is generally closed, and the canister26is opened to the atmosphere. The sealing valve28is opened when the internal combustion engine is stopped, and differential pressure exceeding a valve opening determination value is generated between tank internal pressure and atmospheric pressure. A change in the tank internal pressure generated between before and after the sealing valve28is opened is detected. When the change in the tank internal pressure is below a predetermined determination value, closing failure of the sealing valve is determined.

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