Internal-combustion engines – Charge forming device – Fuel injection system
Reexamination Certificate
2005-03-15
2005-03-15
Miller, Carl S. (Department: 3747)
Internal-combustion engines
Charge forming device
Fuel injection system
C123S179170, C123S446000, C417S269000
Reexamination Certificate
active
06866025
ABSTRACT:
A high pressure piston pump includes a housing having a low pressure fuel inlet and a high pressure fuel outlet; at least two pistons disposed in the housing; a driveshaft for supplying power to drive the at least two pistons; and a bypass valve fluidly connected to at least one of the at least two pistons to deactivate the at least one piston. A method of varying the flow output of a high pressure piston pump having at least two pistons includes deactivating at least one of the two pistons by directing fluid displaced by the at least one piston to a bypass valve.
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Miller Carl S.
Siemens VDO Automotive Corp.
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