Servo valve for controlling an internal combustion engine...

Details Servo valve for controlling an internal combustion engine... Servo valve for controlling an internal combustion engine...

2007-05-22

2007-05-22

Miller, Carl S. (Department: 3747)

Internal-combustion engines

Charge forming device

Fuel injection system

C123S500000

Reexamination Certificate

active

11112772

ABSTRACT:
A control servo valve (8) is housed inside the casing of an internal combustion engine fuel injector (1), and has an actuator (9), a control chamber (13) communicating with a fuel inlet (5) and with a fuel outlet passage (22), and a shutter (35) movable along an axis (3) by the actuator (9) between a closed position and an open position to close and open the outlet passage (22) respectively; the servo valve (8) also has a fixed axial rod (29) interposed between the actuator (9) and the control chamber (13); the outlet passage (22) comes out through an outer lateral surface (30) of the axial rod (29); and the shutter (35) is defined by a sleeve which slides axially on the outer lateral surface (30), and, in the closed position, closes the outlet passage (22) so as to be subjected to a zero axial resultant force by the pressure of the fuel.

REFERENCES:
patent: 6085719 (2000-07-01), Heinz et al.
patent: 6257499 (2001-07-01), Sturman
patent: 6293254 (2001-09-01), Crofts et al.
patent: 6705291 (2004-03-01), Rueger et al.
patent: 6837221 (2005-01-01), Crofts et al.
patent: 43 10 984 (1994-10-01), None
patent: 0 740 068 (1996-10-01), None
patent: WO 01/11227 (2001-02-01), None

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