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:
Dec. 08, 2015
Filed:
Aug. 13, 2014
Dr. Ing. H.c. F. Porsche Aktiengesellschaft, Stuttgart, DE;
Thomas Melzig, Hoefingen, DE;
Stephan Pelters, Tiefenbronn, DE;
Arno Wunderlich, Sindelfingen, DE;
Lutz Kretzschmar, Stuttgart, DE;
DR. ING. H.C. F. PORSCHE AKTIENGESELLSCHAFT, Stuttgart, DE;
Abstract
A method monitors an electromagnetic hydraulic valve for controlling a hydraulically adjustable valve gear of a reciprocating piston engine. The hydraulic valve includes an electromagnetic coil and a moving armature configured to connect a control port hydraulically to a high-pressure port or a low-pressure port, depending on an energization of the coil. The method includes detecting a movement of the armature, using a control unit, in response to an energization of the coil based on a mutual induction in the coil and identifying a defect, using the control unit, if the expected mutual induction does not occur.