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-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 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 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-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.

Abstract: In order to produce a variable valve lift device for the lift adjustment of the gas-exchange valves of an internal combustion engine, by means of which with adjustment forces and holding forces, independently from whether said holding forces and adjustment forces are applied mechanically, hydraulically or electrically, with an adjustment of the valve lift being as cost-effective as possible, and with maximum accuracy of the adjustment or control of the valve lift to be taken between the individual cylinders of a multi-cylinder internal combustion engine, and, moreover, the adjustment possibility of the valve lift of the valves of an internal combustion engine with several cylinders is obtained within smallest tolerances, it is suggested that a valve lift device (1) has a rotatable eccentric shaft (3), which consists of several eccentrics (4, 5) and whereby all possible contours of the eccentrics (4, 5) are positioned within a circle, which is formed by means of the external diameters of a bearing (6, 7) of th

Abstract: A device for adjusting the valve lift (1) of the valves of a combustion engine comprising a lever (3) being driven by a camshaft (4), pushed against the cam-shaft (4) by a spring, which cooperates with at least one valve engagement means and is positioned by a positioning means (6).

Abstract: A variable mechanical valve control for an internal combustion engine is provided having an underhead camshaft for adjusting a valve stroke and an opening and closing time, making it possible to achieve a very compact transmission gear between the push rod drive and the intake and exhaust valves, to reduce the number of components required for the transmission gear, and to obtain a mechanical, completely variable valve train with an underhead camshaft.

Abstract: A variable mechanical valve control for an internal combustion engine is provided having an underhead camshaft for adjusting a valve stroke and an opening and closing time, making it possible to achieve a very compact transmission gear between the push rod drive and the intake and exhaust valves, to reduce the number of components required for the transmission gear, and to obtain a mechanical, completely variable valve train with an underhead camshaft.

Abstract: A device for adjusting the valve lift (1) of the valves of a combustion engine comprising a lever (3) being driven by a camshaft (4), pushed against the cam-shaft (4) by a spring, which cooperates with at least one valve engagement means and is positioned by a positioning means (6).

Abstract: A device for adjusting the valve lift (1) of the valves of a combustion engine comprising a lever (3) being driven by a camshaft (4), pushed against the camshaft (4) by a spring, which cooperates with at least one valve engagement means and is positioned by a positioning means (6).

Abstract: A variable mechanical valve control for an internal combustion engine is provided having an underhead camshaft for adjusting a valve stroke and an opening and closing time, making it possible to achieve a very compact transmission gear between the push rod drive and the intake and exhaust valves, to reduce the number of components required for the transmission gear, and to obtain a mechanical, completely variable valve train with an underhead camshaft.

Abstract: In order to create a variable mechanical valve control for an internal combustion engine having, in particular, an underhead camshaft for adjusting a valve stroke and an opening and closing time, making it possible to achieve a very compact transmission gear between the push rod drive and the intake and exhaust valves, to reduce the number of components required for the transmission gear, and, in addition, to obtain a mechanical, completely variable valve train with an underhead camshaft, it is proposed that an intermediate lever (7) be linked to a tappet push rod (4) by means of an axle (8) in such a way that a slide gate roller (6), which is rotatably mounted on the axle (8) and driven by the camshaft (1), is moved in a slide gate (9), whereby a first contact surface (10) on the intermediate lever (7) is supported in a reinforced manner by means of a spring (5) on an eccentric shaft (11) or on a second contact surface (12) and a lever (16) can be displaced over an operating curve (13), by means of which the

Abstract: In order to produce a variable valve lift device for the lift adjustment of the gas-exchange valves of an internal combustion engine, by means of which with adjustment forces and holding forces, independently from whether said holding forces and adjustment forces are applied mechanically, hydraulically or electrically, with an adjustment of the valve lift being as cost-effective as possible, and with maximum accuracy of the adjustment or control of the valve lift to be taken between the individual cylinders of a multi-cylinder internal combustion engine, and, moreover, the adjustment possibility of the valve lift of the valves of an internal combustion engine with several cylinders is obtained within smallest tolerances, it is suggested that a valve lift device (1) has a rotatable eccentric shaft (3), which consists of several eccentrics (4, 5) and whereby all possible contours of the eccentrics (4, 5) are positioned within a circle, which is formed by means of the external diameters of a bearing (6, 7) of th

Abstract: A device for adjusting the valve lift (1) of the valves of a combustion engine comprising a lever (3) being driven by a camshaft (4), pushed against the camshaft (4) by a spring, which cooperates with at least one valve engagement means and is positioned by a positioning means (6).

Abstract: A valve-lift device for the variable control of gas-exchange valves of an internal combustion engine is provided. The device includes a pivotable lever that is capable of being driven by a camshaft, the pivotable lever having an axis of rotation which can be displaced in a slotted-link track fixed to the housing, and a valve actuation means. The pivotable lever has, at one end, a roller which is driven by a camshaft and, at its other end, a slotted-link roller which is moved along a working curve in a slotted link, the slotted link being designed as an engagement surface of a valve actuation means. A center of rotation of the lever is provided between the roller and the slotted-link roller and the center of rotation of the rocker lever and a supporting axis of the valve actuation means is arranged on a vertical axis in an operating position. In order to set a valve lift, an axis of rotation is displaced in a slotted-link track fixed to the housing.

Abstract: A valve-lift device for the variable control of gas-exchange valves of an internal combustion engine is provided. The device includes a pivotable lever that is capable of being driven by a camshaft, the pivotable lever having an axis of rotation which can be displaced in a slotted-link track fixed to the housing, and a valve actuation means. The pivotable lever has, at one end, a roller which is driven by a camshaft and, at its other end, a slotted-link roller which is moved along a working curve in a slotted link, the slotted link being designed as an engagement surface of a valve actuation means. A center of rotation of the lever is provided between the roller and the slotted-link roller and the center of rotation of the rocker lever and a supporting axis of the valve actuation means is arranged on a vertical axis in an operating position. In order to set a valve lift, an axis of rotation is displaced in a slotted-link track fixed to the housing.