Canister purge system having improved purge valve

Details Canister purge system having improved purge valve Canister purge system having improved purge valve

1994-01-19

1995-05-09

Miller, Carl S.

Internal-combustion engines

Charge forming device

Having fuel vapor recovery and storage system

123458, F02M 3704

Patent

active

054130824

ABSTRACT:
The valve has a one-piece guide and valve seat member and a one-piece valve member that is guided by a bushing lining the guide of the guide and seat member. The valve is operated by a duty-cycle modulated waveform, and when the valve is operated in the closing direction, a gap is introduced into the waveform. The valve head and valve seat are configured to cause sonic flow through the valve when the valve is open and the pressure differential across it exceeds a certain minimum.

REFERENCES:
patent: 4026258 (1977-05-01), Ino
patent: 4583509 (1986-04-01), Schecter
patent: 4610233 (1986-09-01), Kushida
patent: 4901702 (1990-02-01), Beicht
patent: 5117797 (1992-06-01), Telep
patent: 5226398 (1993-07-01), Cook
patent: 5237980 (1993-08-01), Gillier
patent: 5249561 (1993-10-01), Thompson
patent: 5259354 (1993-11-01), Sausner
patent: 5284121 (1994-02-01), Abe

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