Patent ID: 7963261
Filing Date: 2011-06-21
Classification: F01L,Y10T

Abstract:
1. A valve drive for an internal combustion engine having a lever which opens and closes a valve and which can be pivoted with respect to a support point by a cam of a camshaft, with a) the cam b) the support point is variable to vary the lifting movement of the valve, the support point is formed by a support element which is switchable with a first switching sition in which the support point is fixed with a second econd switchin position in which the support point is movable during a rotation of the camshaft, and c) the second cam track has a smaller lift than the first cam track and a idle stroke of the support element is dimensioned such that, during a rotation about the entire second cam track, the support point is moved by the idle stroke in one direction and then back again, while the valve remains at least unmoved.