Abstract: The invention relates to a valve train for internal combustion engines, comprising a camshaft and valve actuation elements for one or more valves, the elements being located in the cylinder head. The aim of the invention is to provide a valve train for an internal combustion engine, with which a reliable stroke adjustment of the valves can be made, without the need for complex technical resources, while at the same time allowing a forward or rear displacement of the valve orifice region. To achieve this, in order to modify the valve stroke curve, the contact point between the transfer member and the cam can be displaced along the periphery of the cam and the contact point between the transfer member and a control curve of the support body can be displaced, forcing the part of the transfer member that interacts with the cam to be guided, by shifting the transfer member in relation to the camshaft.

Abstract: The invention relates to a valve drive assembly for an internal combustion engine. The aim of the invention is to improve the assembly in such a manner that a stationary cam can be reliably connected to a cam that is rotatably mounted on the camshaft and to avoid malfunctions. For this purpose, a groove-type guide is arranged in the area of the base circle of the cam which is rotatably mounted on the camshaft. A pilot locking plunger is mounted in a blind bore of the base circle of the cam that is connected to the camshaft so as to rotate with it. The plunger can be displaced in a controlled manner and can be engaged with the guide disengaged therefrom. The groove-type guide in which the pilot locking plunger engages extends in the base circle of the rotatably mounted cam by approximately 180°.

Abstract: The invention relates to a valve drive for internal combustion engines, comprising at least one cam assembly which can be axially displaced on a camshaft. The assembly consists of at least two cams having different profiles and actuating optionally at least one gas exchange valve for adjusting different valve lifts and/or valve timing. The aim of the invention is to create a space-saving and simple valve drive for an internal combustion engine of the aforementioned type, which allows valve lift and/or valve timing to be adjusted without an additional actuation stage. For this purpose, one cam is connected to the camshaft so as to rotate with the camshaft and the other cam is mounted so as to be rotated on the camshaft. The cam that is rotationally mounted on the camshaft can be positively connected to and released from the cam that is connected so as to rotate with the camshaft via a controlled pilot and main locking plunger.

Abstract: Valve gears for load-change valves of four-stroke internal combustion engines, in which the load-change valves are closed by spring force, engage a pivot lever moved by a cam for opening a load-change channel. The cam engages an intermediate element that it is additionally moved by the lifting curve of the cam during a different work cycle, and adjusts the pivot lever to open the load-change valve slightly during a different work cycle. The intermediate element is prismatically guided on an element that can pivot in the cylinder head and is adjustable in its position, and engages the cam and the pivot lever, so that the stroke movement of the cam for opening the load-change valve via the pivot lever can be adjusted.

Abstract: A valve gear arrangement for load change valves of internal combustion engines has an intermediate element that is pivoted on a lever in the cylinder head, to activate the load change valves. The intermediate element engages a cam of a camshaft and has fork-shaped parallel guides on guide cylinders, over the center axis of which a guide groove in the shape of a circular ring segment extends. A roller axle of a roller that engages the cam is displaceably guided in the guide groove. There are springs supported on the roller axle that force the roller axle against an adjustable guide element, counter to the acting forces, when it passes through a plateau region of the cam, and lies against the plateau region.

Abstract: A valve gear arrangement for load change valves of internal combustion engines has an intermediate element that is pivoted on a lever in the cylinder head, to activate the load change valves. The intermediate element engages a cam of a camshaft and has fork-shaped parallel guides on guide cylinders, over the center axis of which a guide groove in the shape of a circular ring segment extends. A roller axle of a roller that engages the cam is displaceably guided in the guide groove. There are springs supported on the roller axle that force the roller axle against an adjustable guide element, counter to the acting forces, when it passes through a plateau region of the cam, and lies against the plateau region.

Abstract: A variable valve gear for internal combustion engines, having at least one camshaft and pivot lever disposed in the cylinder head, which lever contacts a valve that closes by means of spring force. An intermediate element of a transfer element is mounted in a supporting and displaceable manner, twice on the supporting body and on the pivot lever. The intermediate element engages a supporting surface disposed on the supporting body, first by way of a supporting cam segment disposed on the intermediate element, and second with the controlling cam segment of the supporting body, and third with the pivot lever, by way of an outer contour surface disposed on the intermediate element. The intermediate element indirectly contacts the cam of the camshaft, by way of a roller disposed on an oscillating crank, which is connected with the intermediate element in articulated manner.

Abstract: The invention relates to a valve train for internal combustion engines, comprising a camshaft and valve actuation elements for one or more valves, the elements being located in the cylinder head. The aim of the invention is to provide a valve train for an internal combustion engine, with which a reliable stroke adjustment of the valves can be made, without the need for complex technical resources, while at the same time allowing a forward or rear displacement of the valve orifice region. To achieve this, in order to modify the valve stroke curve, the contact point between the transfer member and the cam can be displaced along the periphery of the cam and the contact point between the transfer member and a control curve of the support body can be displaced, forcing the part of the transfer member that interacts with the cam to be guided, by shifting the transfer member in relation to the camshaft.

Abstract: A variable valve gear for internal combustion engines, having at least one camshaft and pivot lever disposed in the cylinder head, which lever contacts a valve that closes by means of spring force. An intermediate element of a transfer element is mounted in a supporting and displaceable manner, twice on the supporting body and on the pivot lever. The intermediate element engages a supporting surface disposed on the supporting body, first by way of a supporting cam segment disposed on the intermediate element, and second with the controlling cam segment of the supporting body, and third with the pivot lever, by way of an outer contour surface disposed on the intermediate element. The intermediate element indirectly contacts the cam of the camshaft, by way of a roller disposed on an oscillating crank, which is connected with the intermediate element in articulated manner.

Abstract: Valve gears for load-change valves of four-stroke internal combustion engines, in which the load-change valves are closed by spring force, engage a pivot lever moved by a cam for opening a load-change channel. The cam engages an intermediate element that it is additionally moved by the lifting curve of the cam during a different work cycle, and adjusts the pivot lever to open the load-change valve slightly during a different work cycle. The intermediate element is prismatically guided on an element that can pivot in the cylinder head and is adjustable in its position, and engages the cam and the pivot lever, so that the stroke movement of the cam for opening the load-change valve via the pivot lever can be adjusted.