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:
Feb. 23, 2016
Filed:
Nov. 17, 2011
Calin Petru Itoafa, Höchstadt, DE;
Hermann Keller, Dillingen, DE;
Calin Petru Itoafa, Höchstadt, DE;
Hermann Keller, Dillingen, DE;
SCHAEFFLER TECHNOLOGIES AG & CO. KG, Herzogenaurach, DE;
Abstract
The invention proposes a subassembly of a hydraulic variable valve train of an internal combustion engine, having a guide bushing () that can be installed in a hydraulic housing (), and having a piston () supported therein so as to be axially movable for actuating a gas exchange valve (), and having a valve element () that, together with the end face () of the piston distant from the gas exchange valve, defines a hydraulic pressure chamber () in the guide bushing, wherein the valve element is a throttle check valve that allows hydraulic medium to flow out of the pressure chamber throttled by a continuously open throttle opening () and allows hydraulic medium to flow into the pressure chamber with little throttling by a ball check valve (). The subassembly is intended to be implemented as a modular unit assembled outside of the hydraulic housing, wherein the guide bushing and the valve element are fastened to one another, and the piston is secured in a captive manner in the guide bushing.