Internal combustion engine hydraulic fuel pump

Details Internal combustion engine hydraulic fuel pump Internal combustion engine hydraulic fuel pump

2007-08-28

2007-08-28

Moulis, Thomas (Department: 3747)

Internal-combustion engines

Charge forming device

Fuel injection system

C417S393000

Reexamination Certificate

active

11191239

ABSTRACT:
An internal combustion engine fuel pump having at least one cylinder, in which a variable-volume pump chamber is defined; a movable piston defining the bottom of the pump chamber; at least one intake valve communicating with the pump chamber; at least one delivery valve communicating with the pump chamber; and a hydraulic/pneumatic actuating device for moving the piston back and forth with respect to the cylinder to cyclically vary the volume of the pump chamber; the hydraulic/pneumatic actuating device has a first actuating chamber located beneath the pump chamber, a second actuating chamber located above the first actuating chamber, and a control member for cyclically filling the first actuating chamber with pressurized oil.

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patent: 6286469 (2001-09-01), Cobb, Jr.
patent: 6663360 (2003-12-01), Kyer
patent: 683 447 (1994-03-01), None

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