Patent ID: 8683967

Claim:
An internal combustion reciprocating piston engine comprising a crank mechanism having at least one cylinder head whose intake and exhaust channels are regulated, each one, by at least one gas exchange valve configured as an intake or an exhaust valve which can be activated by cams of at least one camshaft and by transmission elements driven by said cams, said cams being configured as sliding cams with at least one cam per sliding cam assembly while being arranged fixed against rotation but axially displaceable on a base shaft, said base shaft being guided, fixed on the internal combustion engine and comprising at least one actuator unit fixed on the internal combustion engine and comprising at least one actuator pin for displacing said sliding cam assemblies into different axial positions with help of at least one displacement groove which cooperates with said actuator pin, said displacement groove being arranged on a periphery of said sliding cam assemblies or on a periphery of a component which is fixed on said sliding cam assembly, said displacement groove being configured with a helical shape and comprising a run-in region and a run-out region for said actuator pin and also a displacement flank and an opposing support flank, said engine further comprising a detent device for locking the sliding cam assemblies in said different axial positions relative to a component fixed on the internal combustion engine, and a distance between the displacement flank and the support flank remains constant along an entire extent of the displacement groove parallel to a direction of displacement of the sliding cam assembly.