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. 25, 2010
Filed:
Jul. 09, 2008
Minh Nam Nguyen, Buhl, DE;
Heiko Dell, Buhlertal, DE;
Holger Stork, Buhl, DE;
Schaeffler KG, Herzogenaurach, DE;
Abstract
A method for adjusting the rotational angle position of the camshaft () of a reciprocating piston internal combustion engine relative to the crankshaft () is provided. The crankshaft () is drivingly connected to the camshaft () via an adjusting drive (), which is embodied as a triple-shaft gear mechanism, having a crankshaft-fixed drive shaft, a camshaft-fixed output shaft, and an adjustment shaft drivingly connected to an electric motor (). A stop element is connected to the drive shaft and a counter-stop element is connected to the camshaft (). The crankshaft rotational angle measuring signal and a position signal for the rotational angle of the adjusting shaft are detected during the starting step of the internal combustion engine. A phase angle signal for the position of the rotational angle of the camshaft (), based on the initial position, in relation to the camshaft () is determined with the aid of the angle measuring signal, the position measuring signal and a gear variable of the triple shaft gear. After immobilization of the crankshaft () and the camshaft () in a reference position in relation to each other and after detection of the reference position, the phase angle in relation to the reference position is measured and is controlled to a target value signal.