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. 23, 2003
Filed:
Jul. 09, 2001
Gerold Sluka, Neckartailfingen, DE;
Edwin Palesch, Lenningen, DE;
Wolfgang Stephan, Boll, DE;
Axel Willi Jochim, Nürtingen, DE;
Andreas Knecht, Kusterdingen, DE;
Other;
Abstract
A camshaft includes a device for hydraulic adjustment of a relative rotating position of the camshaft for the purpose of influencing valve timing. The device has a drive wheel, a cell wheel, and an impeller. The impeller is disposed by way of vanes within cells of the cell wheel and can carry out relative motion. A locking arrangement, which operates in the starting phase of the internal-combustion engine, is provided between the cell wheel and the impeller. The locking arrangement is formed by an axially spring-loaded, hydraulically operated piston housed in one of the vanes of the impeller and by a corresponding receiving device for the piston provided in a constructional unit consisting of the drive wheel and the cell wheel. The piston, which projects by way of a locking section into the receiving device and is guided in the vane, cooperates with an operating element for optimizing the locking arrangement. The piston is acted upon from a first pressure space, and the operating element is acted upon from second pressure space.