Internal-combustion engines – Charge forming device – Fuel flow regulation between the pump and the charge-forming...
Patent
1998-02-17
1999-11-02
Miller, Carl S.
Internal-combustion engines
Charge forming device
Fuel flow regulation between the pump and the charge-forming...
137541, F02M 3704
Patent
active
059750618
ABSTRACT:
A bypass fuel pressure regulator disposed downstream of and in communication with a fuel pump outlet to bypass at least a portion of the outlet fuel from the fuel pump corresponding to the engine's fuel demand. The regulator has a bypass passage with an inlet in communication with the fuel pump outlet and an outlet in communication with the fuel tank. A valve assembly is received in and controls the flow of fuel through the bypass passage. The valve assembly has a disc carried on one end of a stem which has an enlarged valve head adjacent its other end which is movable to open and close an outlet opening of the regulator. The disc is disposed generally transverse to the axis of the bypass passage and upstream of the valve head. The disc has at least one and preferably several openings through which fuel flows into the bypass passage through the disc. A spring is received between the regulator body and the disc to yieldably bias the valve head onto a valve seat to close the regulator outlet. When the fuel pump delivers more fuel than is immediately necessary to operate the engine, the valve head is displaced from the valve seat to return the excess fuel to the fuel tank.
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patent: 5727529 (1998-03-01), Tuckey
Briggs Paul F.
Bucci George H.
Miller Carl S.
Walbro Corporation
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