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:
Jun. 07, 2011
Filed:
Jan. 22, 2007
Markus Proschko, Baudenbach, DE;
Markus Proschko, Baudenbach, DE;
Schaeffler Technologies GmbH & Co. KG, Herzogenaurach, DE;
Abstract
A cylinder head of an internal combustion engine having an electrohydraulic valve controller which includes a master unit (), a slave unit (), a hydraulic valve (), a pressure relief space () and a pressure space () which is arranged in the direction of transmission between the master unit () and the slave unit () and can be connected to the associated pressure relief space () via the hydraulic valve (). The master unit (), the slave unit (), the pressure space (), the hydraulic valve (), the pressure relief space () and a non-return valve () are preassembled in a common hydraulic housing (), to form a pre-assembled hydraulic unit () which is fastened to the cylinder head () and which is connected to the hydraulic medium supply of the internal combustion engine via the non-return valve (). Here, for the initial filling of the pressure relief space () and/or of the pressure space () with hydraulic medium, at least one filling device () is provided which is independent of the hydraulic medium supply, and is formed on the hydraulic housing () and has a closure ().