Internal combustion engine fuel injector

Details Internal combustion engine fuel injector Internal combustion engine fuel injector

2007-11-27

2007-11-27

Ganey, Steven J. (Department: 3752)

Fluid sprinkling, spraying, and diffusing

Injection nozzle opened by relieving supply

C239S585100, C239S585400, C251S129160

Reexamination Certificate

active

11171658

ABSTRACT:
An internal combustion engine fuel injector (1) has a rod (10) movable along an axis (3) to open/close a nozzle, and a servovalve (7) having a control chamber (23) with a discharge passage (26) which is opened/closed by a shutter (17) movable axially under the control of an electro-actuator (14); the servovalve (7) also has a fixed axial rod (33) having an outer lateral surface (34) through which the discharge passage (26) comes out; the shutter (17) is fitted to the axial rod (33) to slide axially in substantially fluidtight manner, and, when closing the discharge passage (26), is subjected to substantially zero resultant axial pressure by the fuel; and the control chamber (23) is bounded radially by a tubular portion (8) formed in one piece with said axial rod (33).

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Search Report issued by European Patent Office on Oct. 27, 2004 in connection with corresponding European application No. EP 04 42 5475.
Search Report issued by European Patent Office on Aug. 19, 2005 in connection with corresponding European application No. EP 05 42 5383.

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