Servo valve for controlling an internal combustion engine...

Fluid sprinkling – spraying – and diffusing – With means to vibrate or jiggle discharge – By electric transducer

Reexamination Certificate

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Details

C239S096000, C239S127000, C239S584000, C239S600000, C251S057000, C251S129060, C123S498000

Reexamination Certificate

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07469843

ABSTRACT:
A control servo valve (8) is housed inside the casing (2) of an internal combustion engine fuel injector (1), and has a piezoelectric actuator (40), and a control chamber (13) having a fuel outlet passage (21); the outlet passage (21) comes out inside an annular chamber (34) defined by a fixed tubular portion (25) and by a shutter (32), which engages the tubular portion (25) in substantially fluidtight manner and is slid axially by the piezoelectric actuator (40) from a closed position, in which it closes the annular chamber (34) and is subjected to a zero axial resultant force by the fuel pressure, to an open position, in which the outlet passage (21) communicates with a discharge conduit.

REFERENCES:
patent: 5979790 (1999-11-01), Gürich et al.
patent: 6313568 (2001-11-01), Sullivan et al.
patent: 6457699 (2002-10-01), Stoecklein
patent: 6805302 (2004-10-01), Boecking
patent: 6840466 (2005-01-01), Igashira et al.
patent: 2004/0069863 (2004-04-01), Mattes
patent: 199 39 452 (2001-03-01), None
patent: 103 09 885 (2003-10-01), None
patent: 09144621 (1997-06-01), None
patent: 2001082281 (2001-03-01), None
patent: 2002227747 (2002-02-01), None
European Search Report EP 04 42 5474 Dated Nov. 2, 2004.

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