Fuel pump system

Details Fuel pump system Fuel pump system

1986-05-19

1987-06-16

Miller, Carl Stuart

Internal-combustion engines

Charge forming device

With fuel pump

123495, 123514, 123516, 417 40, 220855, 137263, F02M 3902

Patent

active

046729372

ABSTRACT:
A fuel system for maintaining fuel flow when the surface of the pool of fuel in the fuel tank is below a minimum level. The fuel pump system includes a reservoir in the fuel tank and a pump in the reservoir. A motor in the pump drives a first pump which draws fuel from a secondary chamber of the pump and discharges it to the engine. The motor also drives a second pump which draws fuel from the tank through a primary chamber and discharges it to the secondary chamber. The excess of fuel discharged by the second pump over the first pump is discharged through an orifice in the pump to the reservoir. At fuel levels below the minimum, a float controlled solenoid closes an intake port to the primary chamber causing fuel to back-flow through the flow orifice to the secondary chamber to supply the first pump.

REFERENCES:
patent: 1875541 (1932-09-01), Claypool
patent: 3101771 (1963-08-01), McCuen
patent: 3443519 (1969-05-01), White
patent: 4175507 (1979-11-01), Sanada
patent: 4189096 (1966-06-01), Grunwald
patent: 4449723 (1984-05-01), Shiratsulhi

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