Evaporator control valve provided with a solenoid for use in dia

Details Evaporator control valve provided with a solenoid for use in dia Evaporator control valve provided with a solenoid for use in dia

1996-02-23

1999-01-26

Rivell, John

Valves and valve actuation

Electrically actuated valve

Including solenoid

123516, 123519, F02M 3302

Patent

active

058630252

ABSTRACT:
An evaporator control valve is capable of opening a diaphragm in a desired pressure, thereby preventing a fuel tank from being deformed owing to negative pressure in the fuel tank, and also the evaporator control valve is provided with a solenoid for diagnosing trouble capable of forcibly opening or closing the diaphragm only at the time when an evaporating system is diagnosed. An atmospheric pressure chamber is formed on the upper surface of the diaphragm for communicating with the atmosphere, and a spring is disposed on the upper surface of the diaphragm for biasing the diaphragm downward, while a tank side chamber for communicating with the fuel tank and a canister side chamber for communicating with a canister are respectively formed on the lower surface of the diaphragm, and the slit valve is integrally formed with the diaphragm, wherein the tank side chamber and the canister side chamber are allowed to communicate with each other by way of the diaphragm or the slit valve, wherein the diaphragm is forcibly opened or closed by the plunger to be driven by the solenoid disposed inside the atmospheric pressure chamber.

REFERENCES:
patent: 3424429 (1969-01-01), Monnich
patent: 4930747 (1990-06-01), Nakamura
patent: 5211151 (1993-05-01), Nakajima et al.
patent: 5419367 (1995-05-01), Noya
patent: 5469886 (1995-11-01), Noya

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