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:
May. 10, 2005
Filed:
May. 21, 2004
Christian Boie, Aachen, DE;
Lutz Kather, Würselen, DE;
Hans Kemper, Aachen, DE;
Günther Asmus, Titz-Höllen, DE;
Christian Boie, Aachen, DE;
Lutz Kather, Würselen, DE;
Hans Kemper, Aachen, DE;
Günther Asmus, Titz-Höllen, DE;
FEV Motorentechnik GmbH, Aachen, DE;
Abstract
A sensor arrangement for recording the movement of an armature on an electromagnetic actuator for operating a control element, in particular for operating a gas exchange valve of an internal combustion engine, has an axially displaceable bar-like sensor piece, made from a soft magnetic material, having a ring of electrically conducting material of low ohmic resistance. The sensor piece is connected to the control element and to a fixed coil arrangement surrounding the bar-like sensor arrangement at least over a partial length, the coil arrangement comprising at least two coils, arranged one behind the other and connected to a voltage supply and a signal recorder in the form of a carrier frequency measuring bridge, whereby the bar-like sensor piece reduces interfering voltages.