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 mechanically controllable valve drive arrangement includes gas exchange valves each having cylinders associated therewith, a camshaft comprising a peripheral contour, a bearing, an adjusting lever comprising a first end and a second end, a valve lift adjustment device comprising a control shaft which acts on the first end, and a transmission arrangement associated with a respective gas exchange valve. The adjusting lever is supported in the bearing. Each transmission arrangement comprises at least one intermediate lever arrangement comprising an engagement element, and an intermediate lever comprising a working cam, and at least one pivot lever arrangement comprising a pivot lever. The working cam is operatively connected to the pivot lever. The intermediate lever is operatively connected to the peripheral contour. The engagement element is operatively connected to the valve lift adjustment device. The second end of the adjusting lever is operatively connected to the engagement element.

Abstract: A valve train assembly for an engine comprising cylinders, each comprising a gas inlet and a gas outlet valve. A camshaft comprises a peripheral contour. A valve stroke adjusting device comprises a control shaft comprising control contours. An intermediate lever arrangement comprises an intermediate lever comprising a working curve which cooperates with a swivel lever, and an engagement element connected to a control contour. Each intermediate lever is connected to the peripheral contour. A transmission arrangement provides that an intermediate lever arrangement and a swivel lever arrangement is associated with each gas inlet valve. A control contour for an idle range is similar to a control contour for a full-load range. A control contour for a part-load range of a gas inlet valve of a shut-off cylinder comprises a section different to a control contour for a part-load range of the gas inlet valve of a remaining cylinder.

Abstract: An intermediate lever arrangement for a mechanically-controllable valve drive arrangement, includes a pivot lever arrangement. At least one intermediate lever(s) comprising a working cam is configured to be in an operative connection with the pivot lever arrangement. A bearing shaft is arranged on the at least one intermediate lever(s). An engagement element comprising a circumferential point is mounted in the at least one intermediate lever(s) arrangement so as to rotate about an axis of rotation. A fixing device is arranged on the bearing shaft. The fixing device is configured to fix the engagement element in a defined position. A device is configured so that the circumferential point of the engagement element, upon a rotation by an angle ?, describes a curved shape which deviates from an arc of a circle.

Abstract: A mechanically controllable valve drive includes a gas exchange valve on which a transmission arrangement acts via a working contour. The transmission arrangement comprises a first wheel element comprising a toothing which is connected to a camshaft, and a second wheel element comprising a toothing which acts on the gas exchange valve. The transmission arrangement is mounted to move in a cylinder head via a bearing, and is operatively connected to the camshaft and to a valve stroke adjusting device comprising an adjusting shaft. The first and second wheel elements are each mounted to rotate on the adjusting shaft and to be in a geared connection with each another via their respective toothing so that a rotation of the adjusting shaft effects a phase shift between the first and second wheel elements and so that a rotary fixing generates an oscillating movement of the first and second wheel elements.

Abstract: A mechanically controllable valve-train assembly includes a plurality of gas exchange valves, at least two cylinders assigned to each of the gas exchange valves, and valve-lift adjusting devices which each comprise a rotatable eccentric shaft. The eccentric shaft comprises at least one cam element and circumferential control surfaces which comprise at least one eccentric member. The eccentric shaft is driven by a drive device to set various valve-lift positions. A transmission assembly assigned to each of the gas exchange valves is mounted in a cylinder head via a bearing device so as to be movable and is operatively connected to one of the valve-lift adjusting devices and to a camshaft. The at least one cam element is operatively connected to a spring-loaded tappet element and is arranged outside the circumferential control surfaces and at a level of a zero-lift position of the circumferential control surfaces.

Abstract: An intermediate lever arrangement for a mechanically-controllable valve drive arrangement, includes a pivot lever arrangement. At least one intermediate lever(s) comprising a working cam is configured to be in an operative connection with the pivot lever arrangement. A bearing shaft is arranged on the at least one intermediate lever(s). An engagement element comprising a circumferential point is mounted in the at least one intermediate lever(s) arrangement so as to rotate about an axis of rotation. A fixing device is arranged on the bearing shaft. The fixing device is configured to fix the engagement element in a defined position. A device is configured so that the circumferential point of the engagement element, upon a rotation by an angle a, describes a curved shape which deviates from an arc of a circle.

Abstract: A mechanically controllable valve operating mechanism includes a cylinder head, a camshaft, a transmission arrangement mounted to move in the cylinder head via a bearing device. A gas exchange valve has the transmission arrangement act thereon. A valve-lift adjusting device comprises a rotatable adjusting element with an eccentric element having two base points and a peak contour, and at least one further eccentric element. The valve-lift adjusting device acts on the transmission arrangement so that different valve-lift positions are settable. The transmission arrangement is connected to the valve-lift adjusting device and to the camshaft. The at least one further eccentric element of the rotating adjusting element is arranged so that at least two peak contours are provided so that, depending on a rotational angle ? of the rotating adjusting element, the eccentric element or the at least one further eccentric element engage with the transmission 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.

Abstract: A mechanically controllable valve drive includes a gas exchange valve on which a transmission arrangement acts via a working contour. The transmission arrangement comprises a first wheel element comprising a toothing which is connected to a camshaft, and a second wheel element comprising a toothing which acts on the gas exchange valve. The transmission arrangement is mounted to move in a cylinder head via a bearing, and is operatively connected to the camshaft and to a valve stroke adjusting device comprising an adjusting shaft. The first and second wheel elements are each mounted to rotate on the adjusting shaft and to be in a geared connection with each another via their respective toothing so that a rotation of the adjusting shaft effects a phase shift between the first and second wheel elements and so that a rotary fixing generates an oscillating movement of the first and second wheel elements.

Abstract: A mechanically controllable valve-train assembly includes a plurality of gas exchange valves, at least two cylinders assigned to each of the gas exchange valves, and valve-lift adjusting devices which each comprise a rotatable eccentric shaft. The eccentric shaft comprises at least one cam element and circumferential control surfaces which comprise at least one eccentric member. The eccentric shaft is driven by a drive device to set various valve-lift positions. A transmission assembly assigned to each of the gas exchange valves is mounted in a cylinder head via a bearing device so as to be movable and is operatively connected to one of the valve-lift adjusting devices and to a camshaft. The at least one cam element is operatively connected to a spring-loaded tappet element and is arranged outside the circumferential control surfaces and at a level of a zero-lift position of the circumferential control surfaces.

Abstract: A mechanically controllable valve drive includes a cylinder head, a valve lift adjustment device comprising a rocker arm, a pivoted lever assembly comprising an end surface, an engagement element, and a bearing means. The pivoted lever assembly is mounted in the cylinder head via the bearing means so as to be movable. A gas exchange valve is configured to have the pivoted lever assembly act thereon via the end surface. A positioning device is configured to engage on the rocker arm. A valve clearance is arranged between the rocker arm and the engagement element. At least one adjustment device is configured to provide a valve clearance adjustment. The engagement element of the pivoted lever assembly is operatively connected to the rocker arm of the valve lift adjustment device via a work curve.

Abstract: A mechanically controllable valve operating mechanism includes a cylinder head, a camshaft, a transmission arrangement mounted to move in the cylinder head via a bearing device. A gas exchange valve has the transmission arrangement act thereon. A valve-lift adjusting device comprises a rotatable adjusting element with an eccentric element having two base points and a peak contour, and at least one further eccentric element. The valve-lift adjusting device acts on the transmission arrangement so that different valve-lift positions are settable. The transmission arrangement is connected to the valve-lift adjusting device and to the camshaft. The at least one further eccentric element of the rotating adjusting element is arranged so that at least two peak contours are provided so that, depending on a rotational angle ? of the rotating adjusting element, the eccentric element or the at least one further eccentric element engage with the transmission arrangement.