Patent ID: 6510841
Filing Date: 2003-01-28
Classification: F02M

Abstract:
A fuel injector for a fuel injection system of an internal combustion engine, comprising:a solenoid coil; a valve-closure member; a valve seat surface, the valve-closure member and the valve seat surface together forming a sealing seat; an armature subdivided into a first armature part and a second armature part; a valve needle connected in a force-locking manner to the armature, for actuating the valve-closure member; a first resetting spring for acting upon the first armature part in a closing direction through the solenoid coil, the first resetting spring having a first spring force; and a second resetting spring for acting upon the second armature part in the closing direction, the second resetting spring having a second spring force smaller than the first spring force; wherein, in response to a switching off of an exciting current, the first armature part accelerates in the closing direction before the second armature part.