Internal-combustion engines – Charge forming device – Fuel injection system
Reexamination Certificate
2008-02-14
2009-06-09
Gimie, Mahmoud (Department: 3747)
Internal-combustion engines
Charge forming device
Fuel injection system
Reexamination Certificate
active
07543568
ABSTRACT:
A fuel system may include an auxiliary fuel pump in communication with a fuel source, a fuel pressure amplifier in communication with the fuel pump, a first chamber defining a first fluid volume in communication with the auxiliary fuel pump, a second chamber defining a second fluid volume, and a fuel injector in communication with the second fluid volume. The fuel pressure amplifier may include a piston mechanism having a first side defining a first surface area and a second side defining a second surface area that is less than the first surface area. The first fluid volume may apply a force to the first side of the piston mechanism that is greater than a second force to the second side resulting in displacement of the piston mechanism. The fuel injector may provide a pressurized fuel supply to an engine based on the displacement of the piston mechanism.
REFERENCES:
patent: 4601642 (1986-07-01), Andrews
patent: 6497217 (2002-12-01), Kojima
patent: 6786205 (2004-09-01), Stuhldreher et al.
Gimie Mahmoud
GM Global Technology Operations Inc.
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