Patent ID: 7984706

Claim:
A method of controlling motion of an armature of a fuel injector, the armature being constructed and arranged to move between an open coil and a close coil of the injector, the method including the steps of: applying acceleration current of a certain polarity for a certain amount of time to the open coil with the armature disposed at the close coil, applying de-latching current of a polarity opposite of that of the certain polarity for a certain amount of time to the close coil to release magnetic latch on the armature thereby accelerating movement of the armature towards the open coil, applying deceleration current for a certain amount of time to the close coil thereby decelerating the armature prior to reaching the open coil; and applying a latching current of the certain polarity for a certain amount of time to the open coil prior to or just after impact of the armature with the open coil to magnetically latch the armature to the open coil thereby reducing bounce of the armature at impact.