Patent ID: 6796543
Filing Date: 2004-09-28
Classification: F02M

Abstract:
A solenoid valve to control a fuel injector of an internal combustion engine, comprising:an electromagnet; a movable armature to open and close a fuel discharge passage of a control pressure chamber of the fuel injector, the movable armature including an armature plate, an armature pin, and a control valve member cooperating with a valve seat, the control valve member being operable to move with the armature, the armature plate being supported on the armature pin and being slidably movable in a closing direction of the control valve member via a force produced by an inertial mass of the armature plate; a return spring having an elastic force and an end facing away from the armature plate, the armature plate being slidably movable against the return spring, the elastic force of the return spring acting upon the armature plate; and a hydraulic damping device to damp a post-oscillation of the armature plate during a dynamic sliding of the armature plate on the armature pin, the hydraulic damping device including a supporting piece mounted on and movable with the armature pin; wherein the end of the return spring facing away from the armature plate is braced against the supporting piece.