Fuel injection device with pressure intensifying device, and...

Details Fuel injection device with pressure intensifying device, and... Fuel injection device with pressure intensifying device, and...

2006-06-27

2006-06-27

Miller, Carl S. (Department: 3747)

Internal-combustion engines

Charge forming device

Fuel injection system

C123S467000

Reexamination Certificate

active

07066147

ABSTRACT:
A fuel injection device for internal combustion engines, including a fuel injector that can be supplied by a high-pressure fuel source, and a pressure intensifying device that has a movable piston is connected between the fuel injector and the high-pressure fuel source. The movable piston separates a chamber connected to the high-pressure fuel source from a high-pressure chamber connected to the injector whereby the fuel pressure in the high-pressure chamber can be varied by filling a return chamber of the pressure intensifying device with fuel or by emptying fuel from the return chamber. A valve is provided with a valve body, which can be moved as a function of the fuel pressure prevailing in the return chamber so that the valve can connect the high-pressure chamber to the chamber. The invention also proposes a pressure intensifying device that is suitable for this purpose.

REFERENCES:
patent: 5622152 (1997-04-01), Ishida
patent: 5722373 (1998-03-01), Paul et al.
patent: 5862792 (1999-01-01), Paul et al.
patent: 6345605 (2002-02-01), Augustin et al.
patent: 6453875 (2002-09-01), Mahr et al.
patent: 6513497 (2003-02-01), Mahr et al.
patent: 6634336 (2003-10-01), Kropp

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