Fuel injector with two-stage booster

Details Fuel injector with two-stage booster Fuel injector with two-stage booster

2005-05-13

2009-02-03

Kim, Christopher S (Department: 3752)

Fluid sprinkling, spraying, and diffusing

Unitary injection nozzle and pump or accumulator plunger

C239S102200, C239S533900

Reexamination Certificate

active

07484673

ABSTRACT:
A fuel injector for an internal combustion engine has a nozzle needle that opens or closes at least one injection opening. At an end oriented away from the at least one injection opening, the nozzle needle has a step-shaped widening, which forms an end surface oriented toward the at least one injection opening. The end surface, an end surface of a first booster, and an end surface of a second booster delimit one side of a control chamber; an actuator moves the first booster and the second booster into or out of the control chamber.

REFERENCES:
patent: 5033442 (1991-07-01), Perr et al.
patent: 6685105 (2004-02-01), Ruehle et al.
patent: 43 06 073 (1994-06-01), None
patent: 195 19 191 (1998-12-01), None
patent: WO 01/29403 (2001-04-01), None

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