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:
Apr. 17, 2001
Filed:
Mar. 27, 2000
Applicant:
Inventors:
Matthias Gramann, Neunkirchen, DE;
Michael Nagel, Nuremberg, DE;
Reinhard Orthmann, Mainz, DE;
Hans-Peter Schoener, Modautal, DE;
Holger Steffen, Stuttgart, DE;
Werner Wiedemann, Herzogenaurach, DE;
Rudolf Wilczek, Altdorf, DE;
Assignee:
DaimlerChrysler AG Stuttgart, , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01L 9/04 ;
U.S. Cl.
CPC ...
F01L 9/04 ;
Abstract
A method of operating an actuator for electromagnetically controlling a valve in an internal combustion engine involves supplying a heating current to the operating coils of the actuator before starting the internal combustion engine from a cold start condition. Thereby, the operating coils, the components surrounding them, and the lubricant are heated to ensure proper viscosity of the lubricant and thus proper operation of the actuator.