Fuel injection device for an internal combustion engine

Details Fuel injection device for an internal combustion engine Fuel injection device for an internal combustion engine

2006-01-03

2006-01-03

Nguyen, Dinh Q. (Department: 3752)

Fluid sprinkling, spraying, and diffusing

Unitary injection nozzle and pump or accumulator plunger

C239S089000, C239S091000, C239S092000, C239S124000, C123S467000, C123S446000

Reexamination Certificate

active

06981653

ABSTRACT:
A fuel injection system having a high-pressure fuel pump connected to a fuel injection valve for each cylinder of an internal combustion engine in which the high-pressure fuel pump has a piston defining a working chamber communicating with a pressure chamber of the fuel injection valve, which has an injection valve element that controls injection openings and can be moved in an opening direction counter to a closing force by the pressure prevailing in the pressure chamber. A first control valve controls a connection of the pump working chamber to a relief chamber and a second control valve controls a connection of a control pressure chamber, which communicates with the pump working chamber, to a relief chamber. When a control piston acts on the injection valve element, in a stroke position of the control piston in which the injection valve element is in its closed position, the pressure prevailing in the control pressure chamber acts on a greater end surface of the control piston than in a stroke position of the control piston in which the injection valve element is opened by its maximal stroke.

REFERENCES:
patent: 5860597 (1999-01-01), Tarr
patent: 6021760 (2000-02-01), Boecking
patent: 6405941 (2002-06-01), Ganser
patent: 6499465 (2002-12-01), Mahr et al.
patent: 199 46 766 (2001-04-01), None
patent: 0 987 431 (2000-03-01), None
patent: WO 00/28205 (2000-05-01), None

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