Internal-combustion engines – Charge forming device – Fuel flow regulation between the pump and the charge-forming...
Patent
1994-03-07
1995-06-06
Argenbright, Tony M.
Internal-combustion engines
Charge forming device
Fuel flow regulation between the pump and the charge-forming...
137542, 123457, F16K 1502, F02M 3710
Patent
active
054213061
ABSTRACT:
In a fuel delivery system that includes a pump for supplying fuel under pressure from a supply to an internal combustion engine and a pressure regulator for returning excess fuel from the engine to the supply, a check valve is positioned between the pump and the engine for preventing back-flow of fuel from the engine to the pump. The valve has a flow passage with a central axis and a valve seat orientated away from the pump. A valve element is positioned within the passage for axial motion against a coil spring as a function of fuel flow from the pump. A first portion of passage surrounding the valve element has a cross section to fluid flow that increases substantially monotonically from the seat for an axial distance that at least corresponds to maximum travel of the valve element against the spring. A substantially cylindrical second portion of the valve passage is positioned adjacent to the first portion and surrounds the valve element, and the valve element is slidably retained in a keeper within the cylindrical portion of the passage. Thus, axial and lateral motions of the valve element are stabilized, greatly reducing pressure pulses delivered from the pump to the engine.
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Argenbright Tony M.
Moulis Thomas N.
Walbro Corporation
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