Internal-combustion engines – Charge forming device – Fuel flow regulation between the pump and the charge-forming...
Patent
1997-05-29
1998-04-28
Miller, Carl S.
Internal-combustion engines
Charge forming device
Fuel flow regulation between the pump and the charge-forming...
123509, 123497, 417 80, 137574, F02M 3704
Patent
active
057432392
ABSTRACT:
In a fuel supply system for a vehicle, provided with a fuel tank having a bottom wall having an upward convex portion dividing an interior space of the fuel tank into a first chamber and a second chamber, a discharge rate of an electric fuel pump is controlled properly to reduce power consumption and fuel consumption. A fuel level monitoring means compares an output D.sub.m of a fuel meter unit 13 representing a level of fuel in the fuel tank with a set threshold fuel level L.sub.j, i.e., a minimum fuel level that requires the operation of a jet pump which pumps fuel from the second chamber into the first chamber. A power supply control means controls power supply to the fuel pump to supply power necessary for driving the fuel pump for operation at a discharge rate equal to the sum of the fuel consumption of the engine and a minimum required flow rate necessary for maintaining the performance of the fuel supply system when D.sub.m .gtoreq.L.sub.j or for operation at a maximum discharge rate when D.sub.m <L.sub.j.
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Fuji Jukogyo Kabushiki Kaisha
Miller Carl S.
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