Differential pressure regulator for fuel systems

Details Differential pressure regulator for fuel systems Differential pressure regulator for fuel systems

2008-01-22

2008-01-22

Gimie, Mahmoud (Department: 3747)

Internal-combustion engines

Charge forming device

Fuel injection system

C123S514000

Reexamination Certificate

active

11668652

ABSTRACT:
A differential pressure regulator includes a housing having a first and second chamber, a fuel pump inlet, a passage, and a return orifice. The fuel pump inlet is in fluid communication with the passage and the first chamber while the return orifice is in fluid communication with the passage and the second chamber. A movable diaphragm separates the first chamber from the second chamber with a first and a second needle valve connected to opposing sides of the diaphragm. The first needle valve is reciprocally disposed in the fuel pump inlet while the second needle valve is reciprocally disposed in the return orifice. The differential pressure regulator also includes a fuel injection supply opening that is located in the first chamber and the return opening that is located in the second chamber.

REFERENCES:
patent: 3618383 (1971-11-01), Holden
patent: 4175433 (1979-11-01), Rikuta
patent: 4986240 (1991-01-01), Muraji et al.
patent: 5031596 (1991-07-01), Muraji
patent: 5785023 (1998-07-01), Cross

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