Abstract: A valve spring collar (10) for supporting spring forces of closing springs (40) that act on gas exchange valves (32) in an internal combustion engine has a plate-shaped main body (12). A through opening (14) leads through the main body (12) for receiving and attaching a valve stem (36) of the gas exchange valve (32). The valve spring collar (10) also has at least one cavity (16). A method for producing the valve spring collar (10) includes at least one additive production method step.

Abstract: A valve spring collar (10) for supporting spring forces of closing springs (40) that act on gas exchange valves (32) in an internal combustion engine has a plate-shaped main body (12). A through opening (14) leads through the main body (12) for receiving and attaching a valve stem (36) of the gas exchange valve (32). The valve spring collar (10) also has at least one cavity (16). A method for producing the valve spring collar (10) includes at least one additive production method step.

Abstract: A mechanically controllable valve drive for a reciprocating piston engine configured to adjust a gas exchange valve includes the gas exchange valve, a cam assembly comprising a camshaft and at least one cam for the gas exchange valve, a valve, a valve lift adjustment assembly, a drag lift assembly, and a device. The valve lift adjustment assembly comprises a valve lift adjustment device, and an intermediate lever assembly comprising at least one intermediate lever comprising a working curve comprising curve portions. The valve lift adjustment assembly is configured to shift the valve between a zero lift and a maximum lift. The drag lever assembly is operatively connected to the working curve. The device is configured to provide a valve-lift standstill range so that, in a maximum lift position, the valve is opened for a turning angle ? of the camshaft with a flattened valve lift height.

Abstract: A valve lift adjustment arrangement for a mechanically-controllable valve drive arrangement includes a bearing shaft, a first roller, a second roller arranged on the bearing shaft, a camshaft arrangement, a valve lift adjustment device comprising a rotatable eccentric shaft, an intermediate lever arrangement, and a device. The intermediate lever arrangement comprises an intermediate lever with a working curve. The intermediate lever is mounted via the first roller to be movable in a slotted-guide track and to be operatively connected to the camshaft arrangement and to the valve lift adjustment device. The device is configured so that the second roller is eccentrically mounted. The device comprises a tool engagement point which aligns the second roller and thereby the intermediate lever arrangement. The camshaft arrangement acts, via the first roller, on the intermediate lever arrangement. The rotatable eccentric shaft is acts, via the second roller, on the intermediate lever arrangement.

Abstract: A mechanically controllable valve drive for a reciprocating piston engine configured to adjust a gas exchange valve includes the gas exchange valve, a cam assembly comprising a camshaft and at least one cam for the gas exchange valve, a valve, a valve lift adjustment assembly, a drag lift assembly, and a device. The valve lift adjustment assembly comprises a valve lift adjustment device, and an intermediate lever assembly comprising at least one intermediate lever comprising a working curve comprising curve portions. The valve lift adjustment assembly is configured to shift the valve between a zero lift and a maximum lift. The drag lever assembly is operatively connected to the working curve.