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:
Sep. 02, 2014
Filed:
Aug. 24, 2010
Uwe Dietel, Reinsdorf OT Vielau, DE;
Uwe Grossgebauer, Dresden, DE;
Jurgen Meusel, Dittmansdorf, DE;
Bernd Mann, Zschopau, DE;
Uwe Dietel, Reinsdorf OT Vielau, DE;
Uwe Grossgebauer, Dresden, DE;
Jurgen Meusel, Dittmansdorf, DE;
Bernd Mann, Zschopau, DE;
Abstract
A camshaft for an internal combustion engine, having a hollow outer shaft and an inner shaft which is concentrically mounted inside the outer shaft to be rotatable about an angle and a multi-part cam element having a first cam section that is mounted on the outer shaft in a rotationally fixed manner and a second cam section that is connected to the inner shaft in a rotationally fixed manner and rotationally mounted on the outer shaft. The two cam sections have different cam contours, the relative movement of the two cam sections in opposite directions allowing the resulting cam contour of the cam element interacting with a cam follower to be changed to adjust the variable valve opening period. The two cam sections have different maximum lifts, the cam top section of the cam section having the smaller maximum lift being substantially formed by an annular sector.