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. 19, 2012
Filed:
Aug. 18, 2009
Georg Talan, Urbach, DE;
Manfred Batzill, Neuhausen, DE;
Dietmar Schwarzenthal, Ditzingen, DE;
Dr. Ing. h.c. F. Porsche Aktiengesellschaft, Stuttgart, DE;
Abstract
A valve drive of an internal combustion engine with a camshaft including cams for actuating gas-exchange valves, wherein at least one cam, comprising several cam faces, is guided nonrotatably but with freedom of axial movement on the camshaft, wherein a stroke profile, which cooperates with an actuating pin for the axial displacement of the cam, is assigned to the associated axially displaceable cam, and wherein the stroke profile of the axially displaceable cam in question comprises several stroke curves. A first stroke curve and a second stroke curve of the stroke profile are contoured both in the axial direction and in the radial direction such that the contour in the axial direction of the stroke profile of the camshaft is responsible for a defined axial displacement of the associated cam, and the contour in the radial direction of the stroke profile of the camshaft prevents the stroke curves from colliding.