Servo-valve-controlled fuel injector

Details Servo-valve-controlled fuel injector Servo-valve-controlled fuel injector

2007-05-01

2007-05-01

Nguyen, Dinh Q. (Department: 3752)

Fluid sprinkling, spraying, and diffusing

Unitary injection nozzle and pump or accumulator plunger

C239S089000, C239S090000, C239S091000, C239S124000, C239S533200, C239S585100, C123S446000, C123S467000, C123S506000, C132S327000

Reexamination Certificate

active

11092751

ABSTRACT:
A fuel injector having an injection valve connected to a high-pressure source and a control valve including a control piston guided in a valve body and comprising a pressure piston section having a first pressure surface guided in a bush and a control piston section with a sliding seal that has a control edge; the bush is contained in a pressure chamber of the valve body. In a first valve position, a sealing seat of the control piston disconnects a valve chamber from a low-pressure/return system and in a second valve position, the control edge of the control piston disconnects the pressure chamber from the valve chamber; in the second valve position, a connection is simultaneously produced between the valve chamber and the low-pressure/return system, thus initiating an actuation of the fuel injection valve. The control piston section with the control edge is guided in a control cylinder that is contained in the pressure chamber of the valve body and is separate from the bush.

REFERENCES:
patent: 3802626 (1974-04-01), Regneault et al.
patent: 5669355 (1997-09-01), Gibson et al.
patent: 5687693 (1997-11-01), Chen et al.
patent: 5975139 (1999-11-01), Carroll et al.

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