Patent ID: 8230833
Filing Date: 2012-07-31
Classification: F01L,Y10T

Abstract:
1. A valve train for an internal combustion engine for actuating gas exchange valves, the valve train comprising: a camshaft in the form of a camshaft tube driven by a crankshaft of the internal combustion engine; a selector shaft disposed in the camshaft tube, a surface of the selector shaft including a shifting contour having an axial gradient; at least one cam carrier disposed on the camshaft and axially displaceable but rotationally fixed with respect to the camshaft, each cam carrier including an identical base-circle portion and a plurality of cam profiles; a rotationally fixed but axially displaceable shifting sleeve disposed between the camshaft tube and the rotatable selector shaft of each cam carrier, each shifting sleeve including a hole therein; a shifting ball disposed in the hole of each shifting sleeve, the shifting ball being coupled with the shifting contour of the selector shaft so as to be guided by the selector shaft so as to axially displace the shifting sleeve by rotation of the selector shaft; and a driver, the shifting sleeve being operatively connected to the cam carrier via at least the driver for axial displacement of the cam carrier.