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

2005-05-17

2005-05-17

Yuen, Henry C. (Department: 3747)

Fluid sprinkling, spraying, and diffusing

Unitary injection nozzle and pump or accumulator plunger

C123S445000, C239S124000, C239S127000, C239S553000

Reexamination Certificate

active

06892955

ABSTRACT:
There is disclose a high-pressure fuel pump and a fuel injection valve connected to it for each cylinder of an internal combustion engine. A pump piston of the pump delimits a working chamber connected to a pressure chamber of the injection valve having a valve element controlling injection openings and movable in an opening direction counter to closing force by pressure prevailing in the pressure chamber. A control valve controls connection of a control pressure chamber with the pump-working chamber delimited by a control piston to a relief chamber. When the injection valve element is closed, the control piston opens a main connection with a large flow cross section and when the injection valve element is open, this control piston closes the main connection, only opening a bypass connection with small flow cross section, the bypass connection is embodied in a housing part delimiting the control pressure chamber.

REFERENCES:
patent: 6189509 (2001-02-01), Froment
patent: 6244245 (2001-06-01), Boecking

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