Patent ID: 7409938
Filing Date: 2008-08-12
Classification: F01L

Abstract:
1. A valve drive of an internal combustion engine comprising: a cylinder head with at least one camshaft on which at least one cam carrier is mounted so as to be nonrotatable and axially displaceable, the at least one cam carrier having at least one cam on which at least two different cam travel paths are configured, the at least one cam carrier, for the purpose of bearing the at least one camshaft, being enclosed in at least one camshaft bearing rigidly mounted on a cylinder head, means for axially displacing at least one cam carrier in relation to the at least one camshaft between a first axial position and at least one second axial position, wherein in the first axial position of the cam carrier, a first contact surface rigidly mounted on a first cam carrier is in contact with a first contact surface rigidly mounted on a cylinder head, in the second axial position of the cam carrier, a second contact surface rigidly mounted on a cam carrier is in contact with a second contact surface rigidly mounted on a cylinder head, and means for applying an axial tensioning force are configured between camshaft and cam carrier, the axial tensioning force displacing the cam carrier in the area of the first axial position in the direction of the first axial position, and in the area of the second axial position in the direction of the second axial position.