The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 31, 2000
Filed:
Feb. 24, 1999
Gunter Schmitz, Aachen, DE;
FEV Motorentechnik GmbH & Co. Kommanditgesellschaft, Aachen, DE;
Abstract
A method of regulating an electromagnetic actuator is disclosed. The electromagnetic actuator has an electromagnet; an armature movable, in a switching step, by a controlled current supply to said magnet coil, from a first armature position to a second, pole face-engaging armature position against a force of a resetting spring. The method includes the following steps for regulating the current flow through the magnet coil to set a low velocity of the armature as it arrives at the pole face: during the switching step, detecting the energy amount in the electromagnetic actuator by detecting a changing armature position and/or a changing armature velocity; estimating by extrapolation the expected energy amount upon arrival of the armature on the pole face; and forming a coarse correcting value by comparing the estimation to be extrapolated with a predetermined target value selected with an aid of the total energy stored in the system in the second armature position.