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:
Jul. 17, 2001
Filed:
Jan. 25, 2000
Frank Kirschbaum, Stuttgart, DE;
DaimlerChrysler AG, Auburn Hills, MI (US);
Abstract
Method for controlling the supply of electrical energy to an electromagnetic device and use of a sliding mode controller. Control devices are known in which, in order to obtain a desired movement of an electromagnetically activated gas exchange valve, the supply of electrical energy is controlled as a function of a measured position of the gas exchange valve. The novel method is intended to optimize the control with respect to the movement forms to be obtained, the formation of noise and/or the required use of electrical energy. In a control device according to the invention, a differential signal is generated using the movement signal or a signal generated from the movement signal, and using a desired signal. The supply of electrical energy to the activating device of the gas exchange valve is controlled by means of a sliding mode controller using the differential signal.