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. 01, 2008
Filed:
Aug. 17, 2006
Christof Faria, Erlangen, DE;
Frank Himsel, Obermichelbach, DE;
Christof Faria, Erlangen, DE;
Frank Himsel, Obermichelbach, DE;
Schaeffler KG, Herzogenaurach, DE;
Abstract
The invention proposes a variable valve train () for a gas exchange valve () of an internal combustion engine, which gas exchange valve () is actuated by a cam (), said valve train () comprising a force transmission device () that is arranged between the cam () and the gas exchange valve () and includes a hydraulic lifting device () comprising a pressure piston () that is arranged for longitudinal displacement in a cylinder (), said pressure piston () defining a pressure chamber () that is connected to a pressure medium supply of the internal combustion engine and said pressure piston () permitting, under high-pressure loading, an actuation of the gas exchange valve () independently of the cam (). The force transmission device () is configured as an oscillating lever or rocker arm () mounted for pivoting on a lever shaft () comprising a longitudinal channel () that transports pressure medium and acts as a link () between the pressure medium supply and the pressure chamber ().