Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1994-08-08
1995-12-26
Miller, Carl S.
Internal-combustion engines
Charge forming device
Fuel injection system
1374938, 123510, F02M 4100, F16K 1726
Patent
active
054778298
ABSTRACT:
A fuel delivery system for a fuel injected automotive internal combustion engine has a fuel pump mounted within a fuel tank for pumping fuel through a fuel line to an engine mounted fuel rail which delivers fuel to a plurality of fuel injectors. Attached on the output side of the fuel pump in the fuel line is a pressure valve for controlling fuel flow from the pump to the rail and from the rail to the pump. The pressure valve has a housing for containing a check valve, which opens upon the fuel pump delivering a predetermined pressure to the fuel line, and a pressure relief valve, which opens to allow fuel flow from the fuel line to the output side of the fuel pump when the fuel line is overpressurized. The relief valve has a predetermined set point greater than that of the check valve is mounted in parallel therewith so that pressure in the fuel line is maintained at an appropriate level during long deceleration periods, as well as when the engine is off.
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Betki Randall A.
Hassinger Christian V.
Kempfer Stephen T.
Stein Matthew L.
Ford Motor Company
Kelley David B.
May Roger L.
Miller Carl S.
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