Adjustable metering servovalve for a fuel injector

Details Adjustable metering servovalve for a fuel injector Adjustable metering servovalve for a fuel injector

2006-02-17

2008-12-02

Bastianelli, John (Department: 3753)

Fluid sprinkling, spraying, and diffusing

Including valve means in flow line

Reciprocating

C251S129160, C251S129180

Reexamination Certificate

active

07458529

ABSTRACT:
The metering servovalve (7) comprises a valve body (8, 30), an open/close element (45) and an electromagnet (15), and is housed in a casing (2) of the injector (1). The electromagnet (15) actuates a mobile armature (16) for a travel defined by a polar surface (19) of the core (18) of the electromagnet (15). This latter is fixed in the casing (2) by means of a threaded ring nut (40), with the interposition of at least one deformable adjustment shim (48). The ring nut (40) is screwed with a pre-set tightening torque on a thread (46) of the casing (2) so as to bring about an elastic deformation of the adjustment shim (48) and to prevent accidental unscrewing of the ring nut (40). The adjustment shim (48) is constituted by a metal ring with a cross section having a shape chosen between L, C, S, Z, and Σ.

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