Internal-combustion engines – Charge forming device – Fuel injection system
Reexamination Certificate
2008-01-22
2008-01-22
Gimie, Mahmoud (Department: 3747)
Internal-combustion engines
Charge forming device
Fuel injection system
C123S514000
Reexamination Certificate
active
07320313
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
Gimie Mahmoud
GM Global Technology Operations Inc.
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