US 7,320,313 B1 | ||
Differential pressure regulator for fuel systems | ||
Akram R. Zahdeh, Oakland, Mich. (US) | ||
Assigned to GM Global Technology Operations, Inc., Detroit, Mich. (US) | ||
Filed on Jan. 30, 2007, as Appl. No. 11/668,652. | ||
Int. Cl. F02M 69/54 (2006.01); F02M 69/52 (2006.01) |
U.S. Cl. 123—457 [123/514] | 14 Claims |
1. A differential pressure regulator comprising:
a housing having a first chamber and a second chamber;
a fuel pump inlet in fluid communication with a passage and said first chamber;
a return orifice in fluid communication with said passage and said second chamber;
a movable diaphragm that separates said first chamber from said second chamber;
a first needle valve connected to said diaphragm that is reciprocally disposed in said fuel pump inlet;
a second needle valve connected to said diaphragm that is reciprocally disposed in said return orifice;
a fuel injection supply opening in said first chamber; and
a return opening in said second chamber.
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