In-tank fuel pump assembly for fuel-injected engines
Patent
·
OSTI ID:5268271
The patent describes an apparatus for pumping fuel from a fuel tank to an engine. It comprises a supply port for carrying fuel from the apparatus to the engine; a pump having an inlet connected to the fuel tank and a high pressure outlet; means for routing fuel leaving the high pressure outlet to the supply port; a return port connected to the fuel tank for receiving fuel returning from the engine; and a valve associated with the return port and including a diaphragm and a spring. The diaphragm having a first position in which the valve is closed so that fuel cannot pass between the engine and the fuel tank through the return port, and a second position in which the valve is open so that fuel can pass between the engine and the fuel tank through the return port. The spring urging the diaphragm towards its first position; and means for connecting the high pressure outlet of the pump to the valve so that when the pump is operating, fuel from the high pressure outlet moves the diaphragm to its second position against the force of the spring.
- Assignee:
- Whitehead Engineered Products, Inc., Meriden, CT
- Patent Number(s):
- US 4860714
- Application Number:
- PPN: US 6-898432A
- OSTI ID:
- 5268271
- Country of Publication:
- United States
- Language:
- English
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