Leak check device for evaporated fuel purging system

Details Leak check device for evaporated fuel purging system Leak check device for evaporated fuel purging system

2006-02-07

2006-02-07

Garber, Charles (Department: 2856)

Measuring and testing

With fluid pressure

Motor part or auxiliary

Reexamination Certificate

active

06993957

ABSTRACT:
An evaporated fuel purge system has a fuel tank, an adsorption filter and a purge control valve. The evaporated fuel purge system is pressurized and depressurized through a venting flow path by a pump, so that the state of leakage therefrom is thereby inspected. For this inspection, a motor unit for driving the pump which applies or reduces pressure, an in-vehicle battery and a voltage control circuit which controls a battery voltage to a predetermined voltage and supplies the motor unit with a current are provided. A switchover valve is integrated with the pump, the motor and the like into a single module.

REFERENCES:
patent: 4817870 (1989-04-01), Dalton
patent: 5635630 (1997-06-01), Dawson et al.
patent: 5890474 (1999-04-01), Schnaibel et al.
patent: 6161423 (2000-12-01), Okuma
patent: 11-336619 (1999-12-01), None
patent: 2000-205056 (2000-07-01), None
Machine translation of Japanese Application Publication 2000-205056.

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