Fuel injector with adjustable-metering servo valve for an...

Details Fuel injector with adjustable-metering servo valve for an... Fuel injector with adjustable-metering servo valve for an...

2007-04-10

2009-06-30

Fristoe, Jr., John K (Department: 3753)

Valves and valve actuation

Electrically actuated valve

Including solenoid

C251S129160, C239S533200

Reexamination Certificate

active

07552909

ABSTRACT:
An injector with an adjustable-metering servo valve is provided. The injector has a shutter actuated by an armature of an electromagnet. The armature is mobile for an opening stroke defined by a surface of the core of the electromagnet, which is fixed in the casing by a ring nut and a hollow support of the core. The hollow support has a first contact surface that acts on a flange of the core. Set between the surface and a shoulder of the casing is a shim. An annular projection, having a second contact surface, is set between the surface and a shoulder of the casing. The second contact surface is contained at least in part in the area corresponding to the first contact surface so that the stroke of the armature is adjusted by plastic deformation of the shim or of the surface of the core.

REFERENCES:
patent: 4365747 (1982-12-01), Knapp et al.
patent: 6126094 (2000-10-01), Ricco
patent: 6161774 (2000-12-01), Ricco
patent: 6443132 (2002-09-01), Ricco et al.
patent: 0450532 (1991-03-01), None
patent: 0890730 (1998-07-01), None
patent: 0905371 (1999-03-01), None
patent: 0916843 (1999-05-01), None
patent: 1219828 (2002-07-01), None
patent: 2378985 (2003-02-01), None
patent: WO96/41947 (1996-12-01), None
European Search Report dated Oct. 2, 2006 based on European Application No. EP06425256.

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