Electromagnetic metering valve for a fuel injector

摘要

The metering valve has a shutter for a discharge conduit, and an electromagnet for controlling an armature (46) disconnected from a relative stem (58) and sliding along the stem by means of a sleeve (59). The armature (27) is secured to the stem (58) by a shoulder of the armature cooperating with a C-shaped ring (62) fitted to the stem (58). A plate (74) is interposed between the sleeve (59) of the armature (27) and a ring nut (44) to reduce the overtravel of the armature, is locked transversely by a support (25) of the electromagnet, and is kept resting on the ring nut (44) by a compression spring (84). To secure the armature to the stem (58), the plate (74) has an opening (78) which is ineffective in reducing overtravel when the plate (74) is moved transversely with respect to the armature.