Control valve for a fuel injection valve

Details Control valve for a fuel injection valve Control valve for a fuel injection valve

1999-05-19

2000-11-14

Yuen, Henry C.

Internal-combustion engines

Charge forming device

Fuel injection system

123514, 239 96, F02M 4702

Patent

active

061454923

ABSTRACT:
A control valve for an injection valve for injecting fuel into an internal combustion engine is described. The injection valve has a control chamber which is connected via an inlet throttle to a high-pressure accumulator, and which can be connected via the control valve and an outlet throttle to an unpressurized return line to a fuel tank. The pressure prevailing in the control chamber acts on a movable nozzle body which is provided with a nozzle needle which releases and seals injection holes as the nozzle body moves. The control valve is constructed adjoining the control chamber, with the result that the pressure prevailing in the control chamber at a first operating surface also acts on the valve body of the control valve. The control valve has a valve chamber which is disposed opposite the control chamber and is connected to the control chamber via the outlet throttle and has a second operating surface, which is smaller than the first operating surface.

REFERENCES:
patent: 4899935 (1990-02-01), Yoshida
patent: 5419492 (1995-05-01), Gant et al.
patent: 5769319 (1998-06-01), Yen et al.
patent: 5860597 (1999-01-01), Tarr
patent: 5979790 (1999-11-01), Gurich et al.

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