Control element for injectors with switchable nozzle needle

Details Control element for injectors with switchable nozzle needle Control element for injectors with switchable nozzle needle

2006-08-15

2006-08-15

Hwu, Davis (Department: 3752)

Fluid sprinkling, spraying, and diffusing

Fluid pressure responsive discharge modifier* or flow...

Fuel injector or burner

C239S533100, C239S533300, C239S533900, C239S585500, C239S088000

Reexamination Certificate

active

07090151

ABSTRACT:
The invention relates to a device for actuating a control piston or nozzle needle (27) via a control chamber (26). The control chamber communicates via a control chamber line (25) with valve chambers (3, 22) of a 3/2-way valve (5). The valve body (6, 40, 51) of this valve is switchable by means of an actuator (11). By means of a restoring spring (14), the valve body (6, 40, 51) is acted upon such that a seat portion (7), embodied in the housing (4) on the valve body (6, 40, 51), is put into its valve seat (20). The valve body (6, 40, 51) of the 3/2-way valve (5) has a seat portion (7) and a longitudinal slide portion (8), as well as hydraulic faces (31,32), facing one another, that make the state of pressure equilibrium of the valve body (6, 40, 51) possible. The valve body (6, 40, 51) is moved to different stroke lengths (10; 23, 24) by means of an actuator (11).

REFERENCES:
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patent: 100 64 790 (2001-06-01), None
patent: 2 305 217 (1997-04-01), None
patent: WO 95/25888 (1995-09-01), None

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