Internal-combustion engines – Charge forming device – With fuel pump
Patent
1991-02-15
1991-12-10
Miller, Carl Stuart
Internal-combustion engines
Charge forming device
With fuel pump
123514, 137565, 137576, F04B 3912
Patent
active
050708490
ABSTRACT:
A modular fuel delivery system including a reservoir in a fuel tank, an electric fuel pump in the reservoir, and a jet pump for pumping fuel from the fuel tank into the reservoir wherein overflow from the reservoir is recirculated by the jet pump back into the reservoir to minimize mixing of potentially hot overflow with cooler bulk fuel in the fuel tank. A recirculation fluid flow path extends from the reservoir to a secondary inlet of the jet pump adjacent a small diameter end of a venturi passage in the latter. A valve closes the recirculation flow path when the reservoir is not overflowing and opens the recirculation flow path when the reservoir is overflowing. A portion of the recirculation flow path is above the maximum surface elevation of fuel in the fuel tank so that the pressure head at the recirculation inlet exceeds the pressure head at the main inlet of the jet pump open to the fuel tank. Accordingly, when the recirculation flow path is open, the jet pump entrains fuel from the recirculation inlet in preference to fuel from the main inlet.
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Armstrong Donald J.
Rich Gregory E.
General Motors Corporation
Miller Carl Stuart
Schwartz Saul
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