Patent ID: 6808133
Filing Date: 2004-10-26
Classification: F02B,F02M,Y02T

Abstract:
A fuel injector for a fuel injection system of an internal combustion engine, comprising:a solenoid coil; a first resetting spring; a second resetting spring; an armature that can be acted upon by the solenoid coil in a stroke direction in opposition to the first resetting spring, the armature being acted upon by the second resetting spring; a valve-closure member; a valve needle connected to the valve-closure member and including a first limit stop for the armature; a valve seat cooperating with the valve-closure member; a connecting part formed of a magnetic material and on which is supported the valve seat; a stationary second limit stop configured on the connecting part and provided for the armature; and a magnetic restricter disposed in a vicinity of the stationary second limit stop and arranged on at least one of the connecting part and the armature, wherein: the second resetting spring acts upon the armature contrary to the stroke direction, and in a resting position when the solenoid coil is not excited, the second resetting spring holds the armature in position at the stationary second limit stop such that the armature is positioned at a preestablished distance from the first limit stop, configured on the valve needle.