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. 27, 2014
Filed:
Feb. 08, 2011
Alexander Draheim, Erlangen, DE;
Alexander Draheim, Erlangen, DE;
Schaeffler Technologies GmbH & Co. KG, Herzogenaurach, DE;
Abstract
A control valve () of a device () for changing the relative angular position of a camshaft () with respect to a crankshaft of an internal combustion engine, wherein, in a region () facing the camshaft (), the control valve () includes a fluid line () for supplying fluid under pressure and wherein, in an axial central region (), the control valve () includes two fluid lines () for supplying and removing fluid under pressure to at least two hydraulic chambers. The hydraulic chambers are operatively arranged between a drive element () and the camshaft () in order to set a defined relative rotational position between the drive element () and the camshaft (). In a region () facing away from the camshaft () the control valve () has a fluid line () for removal of fluid to a tank. In order to reduce wear on the device, according to the invention the fluid line () for removing fluid in a preferably hollow-cylindrical section () of the control valve () is in the form of at least one recess extending through the preferably hollow-cylindrical section () to an outside () of the section ().