Internal-combustion engines – Charge forming device – With fuel pump
Patent
1994-05-23
1995-09-26
Moulis, Thomas N.
Internal-combustion engines
Charge forming device
With fuel pump
417 83, F02M 3704
Patent
active
054527015
ABSTRACT:
An electrically operated fuel pump for automotive vehicles which utilizes a turbine pump rotor operating in an annular pumping channel having circumferentially spaced inlet and outlet ports. The pumping channel has opposed sides with a circumferential array of radially curved grooves axially opposed to the periphery of the impeller and extending radially inwardly from the impeller vanes. The pump has a main outlet leading to the engine to be supplied with fuel. A secondary outlet leads to a fuel jet positioned to direct fuel into a venturi passage to draw fuel from a pump inlet and discharge it into a reservoir in a main fuel tank, the pump being located in the reservoir. A biased valve in the secondary outlet opens when the pump outlet pressure reaches a predetermined pressure to insure adequate fuel flow to the engine upon cold start conditions before fuel is drawn by the jet and venturi and delivered to the reservoir.
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Moulis Thomas N.
Walbro Corporation
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