Abstract: The valve drive of an internal combustion engine has sliding cams which are pretensioned and displaceable axially on a camshaft. The sliding cams are displaceable from a first position in which they act by a first elevation curve on intake valves into a second position in which they act by a second elevation curve on the intake valves. The sliding cams in the first position positively abut a stop of a transfer element connected between the intake valves and the sliding cams, so long as they travel with a segment in the vicinity of the stop. When the base circle of the sliding cams is reached, the sliding cams are displaced into the second position.

Abstract: A valve operating mechanism for an internal combustion engine is disclosed which includes a camshaft arranged in the cylinder head of an internal-combustion engine. A center shift cam is provided which can be selectively connected in a form-locking manner to be rotated on the camshaft or to be rotatable with respect to the cam shaft. On each side of the shift cam, one fixed cam is provided each of which is non-rotatably connected with the camshaft. In the full-load operation of the internal-combustion engine, an electronic control guides by way of a lock valve pressure oil into a hydraulic chamber of the fixed cam and in this case displaces pistons as well as a hollow piston to thereby connect the shift cam with one of the fixed cams. The form-lockingly coupled shift cam actuates intake valves by a relatively large lift by way of a tappet. In the partial-load operation, while the oil pressure is disconnected, the fixed cams actuate the tappet by a smaller lift.

Abstract: An air induction system has pipe elbows swivellably arranged inside an air collector. As a function of the rotational speed and/or the load, in a first position, the intake path is formed by the intake manifolds and the pipe elbows to be relatively long. In a second position of the pipe elbows, the intake manifolds take air in directly from the air collector.