Check and vent valve assembly

Details Check and vent valve assembly Check and vent valve assembly

1994-11-30

1997-04-29

Moulis, Thomas N.

Internal-combustion engines

Charge forming device

Fuel flow regulation between the pump and the charge-forming...

123497, 123459, F02M 3704

Patent

active

056239106

ABSTRACT:
A combination check and vent valve assembly for an automotive engine fuel system. The valve assembly has a fuel passage through a housing with an inlet communicating with a fuel pump outlet and an outlet to supply fuel to the engine. A check valve is disposed within the fuel passage which is normally closed when the fuel pump is not operating, and will open when the inlet fuel pressure exceeds the outlet fuel pressure. A normally closed vent valve is disposed within the fuel passage upstream of the check valve and serves as a moveable seat for the check valve, which will open when the valve assembly outlet fuel pressure is greater by a predetermined value than the fuel pump outlet pressure to bleed fuel through the passage and to the pump to reduce the outlet fuel pressure to a predetermined minimum pressure.

REFERENCES:
patent: 5044344 (1991-09-01), Tuckey
patent: 5148792 (1992-09-01), Tuckey
patent: 5195494 (1993-03-01), Tuckey
patent: 5289810 (1994-03-01), Bauer et al.
patent: 5295469 (1994-03-01), Kariya et al.
patent: 5339785 (1994-08-01), Wilksch
patent: 5361742 (1994-11-01), Briggs et al.
patent: 5365906 (1994-11-01), Deweerdt

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