Anti-siphon and anti-leanout fuel valve

Details Anti-siphon and anti-leanout fuel valve Anti-siphon and anti-leanout fuel valve

1995-06-05

1996-06-11

Miller, Carl S.

Internal-combustion engines

Charge forming device

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

123198DB, 137907, 137462, F02M 3704

Patent

active

055245927

ABSTRACT:
A flow control valve for an internal combustion engine fuel delivery system that includes a valve body having a fuel inlet for connection to a fuel supply and a fuel outlet for connection to the fuel pump, so that the pump can draw fuel under vacuum from the supply through the valve and deliver fuel to an engine. A valve element is disposed within the valve body between the inlet and the outlet, and springs urge the valve element to a closed position within the valve body. A diaphragm is also disposed within the valve body between the valve element and the fuel outlet, and is coupled to the valve element such that suction vacuum applied by a fuel pump to the valve body outlet operates the diaphragm to open the valve element against forces applied by the valve springs to permit flow of fuel from the supply through the valve to the pump. The diaphragm is coupled to the valve element by a resilient detent mechanism responsive to vacuum at the valve outlet above a preselected level for releasing the coupling engagement between the diaphragm and the valve element, such that the valve is closed by the springs to terminate flow of fuel to the valve outlet.

REFERENCES:
patent: 3800736 (1974-04-01), Krohn
patent: 4252094 (1981-02-01), Praxler
patent: 4730591 (1988-03-01), Gohara
patent: 4853160 (1989-08-01), Wood
patent: 4880403 (1989-11-01), Friedle
patent: 4957084 (1990-09-01), Kramer
patent: 5148992 (1992-09-01), Tuckey
patent: 5297578 (1994-03-01), Scott
patent: 5329899 (1994-07-01), Sawert
patent: 5361742 (1994-11-01), Briggs

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