Patent Number: 6,166,896

Title: Method of increasing the cast-off speed of the armature in an electromagnetic actuator

Abstract: A method of increasing a cast-off speed of an armature from a pole of an electromagnet of an electromagnetic actuator, includes the following steps: holding the armature at the pole against a force of a resetting device by maintaining an electric holding current flow through a coil of the electromagnet; and launching the armature from the pole by switching off the holding current; and at a predetermined moment during a release period of the armature from the pole, passing a cast-off current for a predetermined period through the coil. The cast-off current has a polarity opposite to the polarity of the holding current.

Inventors: Schmitz; Gunter (Aachen, DE)

Assignee: FEV Motorentechnik GmbH

International Classification: F01L 9/04 (20060101); H01F 7/18 (20060101); H01F 7/08 (20060101); H01H 047/06 ()

Expiration Date: 12/26/2017