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:
Jan. 21, 2003
Filed:
Feb. 04, 1999
Günter Schmitz, Aachen, DE;
FEV Motorentechnik GmbH, Aachen, DE;
Abstract
The invention relates to a method for monitoring an electromagnetic actuator having at least one electromagnet. This electromagnet acts on an armature, which is displaceable against the force of at least one pull-back spring, and is used for operating an actuator, in particular an electromagnetic actuator for operating a gas exchange valve on the cylinder of an internal combustion engine. In accordance with this method, the electric power of the magnet is controlled via an electric control system. The other electric power parameter, which depends on the controlled electric power parameter, serves as a monitoring parameter, and its curve in time is determined as an actual value, which is then compared with a theoretical value. This theoretical value is the curve in time preset in the control system to ensure correct functioning. In the case of a discrepancy between these two values, an adjustment signal is produced.