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:
Jul. 10, 2012
Filed:
Mar. 05, 2010
Mario Kuhl, Herzogenaurach, DE;
Lothar Von Schimonsky, Gerhardshofen, DE;
Thomas Kremer, Fürth, DE;
Calin Petru Itoafa, Höchstadt, DE;
Jens Lang, Pressig, DE;
Andreas Eichenberg, Chemnitz, DE;
Mario Kuhl, Herzogenaurach, DE;
Lothar von Schimonsky, Gerhardshofen, DE;
Thomas Kremer, Fürth, DE;
Calin Petru Itoafa, Höchstadt, DE;
Jens Lang, Pressig, DE;
Andreas Eichenberg, Chemnitz, DE;
Schaeffler Technologies AG & Co. KG, Herzogenaurach, DE;
Abstract
A hydraulic unit () is provided for a cylinder head () of an internal combustion engine with a hydraulically variable valve train (). In the hydraulic unit, a high-pressure chamber (), a medium-pressure chamber (), and a low-pressure chamber () used as the hydraulic medium reservoir are formed. The low-pressure chamber communicates via a throttle point ('″) with the medium-pressure chamber, and the throttle point is formed by a displaceable valve body (′″) and has through-flow cross sections of different sizes according to a position of the valve body.