Fuel pump with internal pressure regulation

Details Fuel pump with internal pressure regulation Fuel pump with internal pressure regulation

2006-11-14

2006-11-14

Gimie, Mahmoud (Department: 3747)

Internal-combustion engines

Charge forming device

Fuel injection system

C123S496000

Reexamination Certificate

active

07134424

ABSTRACT:
An apparatus for delivering fuel includes a fuel pump having a fuel inlet side and a fuel outlet side, and a fuel pumping mechanism operable to draw fuel from the fuel inlet side and pressurize the fuel for transmission to the fuel outlet side. A pressure regulator relieves pressure in the fuel outlet side when such pressure exceeds a predetermined maximum pressure. The pressure regulator includes a by-pass valve, a first fuel port between the fuel outlet side and the by-pass valve, and a second fuel port between the by-pass valve and the fuel inlet side. The by-pass valve is operative, in response to a pressure in the fuel outlet side in excess of the predetermined maximum pressure, to fluidly connect the first and second ports for the return of at least a portion of the fuel from the fuel outlet side to the fuel inlet side.

REFERENCES:
patent: 4572136 (1986-02-01), Takeuchi et al.
patent: 5195487 (1993-03-01), Zurner et al.
patent: 5701869 (1997-12-01), Richardson et al.

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