Abstract: The invention relates to a gas exchange valve for an internal combustion engine, in each case comprising in particular a hollow valve stem (3) and valve head, in which the valve head comprises a valve bottom and a hollow valve keeper, connected to the external margin of the valve bottom, wherein the valve keeper tapers off as the distance from the bottom increases; the valve stem passes through the hollow valve keeper and is firmly connected to the valve bottom on the one hand, and to the tapering-off end of the valve keeper on the other hand; and the end of the valve stem which is connected to the valve bottom protrudes beyond the connection plane between the valve keeper and the valve bottom, is to be improved in relation to its stability and fatigue strength.

Abstract: A control device for a gas exchange valve of an internal combustion engine having a multi-membered transmission comprising at least one driving element (1), actuating elements (2) each of which actuates one gas exchange valve (3), a transmission element (9) which is hinge-connected between the at least one driving element (1) and an actuating element (2) which acts on a gas exchange valve (3), a cam joint (15) between the transmission elements (9) and an area of the housing (5) of the control device, in which a first bearing area which is provided on the transmission element (9) and a second bearing area which is provided in the housing area are adjustable with respect to one another during operation of the engine, is to be manufacturable easily for extremely accurate operation.

Abstract: A camshaft has contrarotating cams for automotive engines, in which an inside shaft and an outside shaft are arranged concentrically so they are contrarotating, at least one cam has at least one main cam element that can be placed radially on the outside shaft and is supported there so it can rotate. The main cam element is connected to the inside shaft in a manner that is rotationally locked via a fastener passing through a recess in the outside shaft. Further features include a fastener, a main cam element and a locking means. The fastening of the main cam element to the inside shaft is provided by widening the outside diameter of the fastener by the locking means with a resulting tightly seated connection between the fastener and the inside shaft, and the fastener and the locking means.

Abstract: A shaft mechanism, in particular a camshaft of an automotive engine, comprising two concentric contra-rotating shafts mounted one inside the other, namely an inside shaft (1) and an outside shaft (2), at least one cam (3) rotatably mounted on the outside shaft (2), fixedly connected to the inside shaft (1) radially through the outside shaft (2) via a fastening mechanism (5), a sleeve (6) gripped by the fastening mechanism (5) and inserted fixedly into aligned boreholes in the inside shaft (1) on the one hand and in the cam (2) on the other hand, a core (7) that widens the material of the sleeve (6) within its elasticity limits in the area of the inside shaft (1) and is inserted into the sleeve (6) after insertion of the latter into the shaft mechanism, is to be improved with respect to satisfactory mountability.

Abstract: Disclosed is a camshaft, especially for an internal combustion engine of a motor vehicle, comprising at least one cam that is provided with cam segments (2, 3), which can be displaced relative to each other. The aim of invention is to create a compact camshaft structure while obtaining or ensuring good and stable guidance between the cam segments (2, 3) that can be displaced relative to each other. Said aim is achieved by placing the ends of the U-legs of the second cam segment (3), which has the shape of a horseshoe and is movable while the other cam segment (2) is connected in a fixed manner to the camshaft, entirely within the outer contour of the basic camshaft material located between the U-legs in the radially deployed position of the second cam segment (3), said U-legs resulting from the horseshoe shape of said cam segment (3) and extending in a free manner at the ends thereof.

Abstract: A camshaft for automotive engines in particular, comprising at least one first cam (5?) and at least one cam segment (6) which is rotatable to a limited extent with respect to the first cam (5?) and exercises the full or partial function of a second cam (4), with which an inner shaft (3) and an outer shaft (2) are arranged concentrically one inside the other and also rotatably with respect to one another, the first cam (5?) and the cam element (6) surround the outer shaft (2) on the periphery at least in part, the first cam (5?) is fixedly connected to the outer shaft (2), and the respective cam segment (6) is connected to the inner shaft (3) in a rotationally fixed manner, the cam segment (6) is provided with an inside circumferential surface extending over only a section of the circle running concentrically in a circular cylindrical pattern with respect to the inner shaft (3) and the outer shaft (2), the inside circumferential surface of the cam segment (6) is supported on a guide area (2?) formed by the

Abstract: A camshaft for automotive engines in particular, comprising at least one first cam (5?) and at least one cam segment (6) which is rotatable to a limited extent with respect to the first cam (5?) and exercises the full or partial function of a second cam (4), with which an inner shaft (3) and an outer shaft (2) are arranged concentrically one inside the other and also rotatably with respect to one another, the first cam (5?) and the cam element (6) surround the outer shaft (2) on the periphery at least in part, the first cam (5?) is fixedly connected to the outer shaft (2), and the respective cam segment (6) is connected to the inner shaft (3) in a rotationally fixed manner, the cam segment (6) is provided with an inside circumferential surface extending over only a section of the circle running concentrically in a circular cylindrical pattern with respect to the inner shaft (3) and the outer shaft (2), the inside circumferential surface of the cam segment (6) is supported on a guide area (2?) formed by

Abstract: Disclosed is a camshaft, especially for an internal combustion engine of a motor vehicle, comprising at least one cam that is provided with cam segments (2, 3), which can be displaced relative to each other. The aim of invention is to create a compact camshaft structure while obtaining or ensuring good and stable guidance between the cam segments (2, 3) that can be displaced relative to each other. Said aim is achieved by placing the ends of the U-legs of the second cam segment (3), which has the shape of a horseshoe and is movable while the other cam segment (2) is connected in a fixed manner to the camshaft, entirely within the outer contour of the basic camshaft material located between the U-legs in the radially deployed position of the second cam segment (3), said U-legs resulting from the horseshoe shape of said cam segment (3) and extending in a free manner at the ends thereof.

Abstract: The invention relates to a valve control for actuating at least one valve, especially an inlet or outlet valve of an internal combustion engine, wherein the dimension of the valve lift of the at least one valve corresponds to a superposition of two cam profiles which can be adjusted in phases in relation to each other and are displaced synchronously. The aim of the invention is to improve the construction and functioning of the valve control. As a result, a guiding means between an intermediate element and the first cam profile is embodied as third cam profile which is formed in a complementary manner with respect to the first cam profile and rotates in a synchronous manner therewith.

Abstract: A gas shuttle valve is for an internal combustion engine, in which a valve plate, as a sealing element, a tubular valve shaft, as a guide element, and a thrust part, which seals the end of the valve shaft opposite to the valve cone, as a stop for a valve operating element having a support for a typical valve spring, are welded to one another. This production method is distinguished by a precisely fitted assembling of these parts to a predetermined length measure, which precedes the permanent bonding of the valve shaft and thrust part.

Abstract: Disclosed is a piston engine, especially a reciprocating internal combustion engine comprising: —a working space that is controlled by main valves; —a charge channel leading to at least one of the main valves; a section of the charge channel, which is split into at least two parallel charge channel paths; and—at least one additional valve that is disposed inside each of the two parallel charge channel paths and controls the portion of the charge volume flow penetrating the path. The additional valves are embodied as rotary slide valves which rotate in a single direction when the engine is operated. The volume throughputs of the main valves and additional valves as well as the volume throughputs among the additional valves can be variably coordinated.

Abstract: A control device for a gas exchange valve of an internal combustion engine having a multi-membered transmission comprising

Abstract: The aim of the invention is to functionally improve a hydraulic play compensation element for a valve gear of an internal combustion engine. To this end, the play compensation element is characterized by the following features. Both components (4; 6) enclose a pressure chamber (7) between them, which is sealed from the exterior and which has a volume that depends on the relative position of both components (4; 6). A pressure spring (5) that presses both components (4; 6) away from one another is mounted inside the pressure chamber (7). The pressure chamber (7) can be connected to the storage chamber (8) via a spring-loaded one-way valve (10) through which media can flow exclusively into the pressure space. An additional controllable stop valve (11) is provided in the connection of the pressure chamber (7) to the storage chamber (8). A throttling channel (17), which serves as a bypass to the one-way valve (10), is provided between the pressure chamber (7) and the controllable stop valve (11).

Abstract: A control device for an intake valve of an internal combustion engine comprising an adjusting element and a control element. According to the invention, the adjusting element comprises a base body (2) and is displaceably arranged between the control element and the valve. The control element rotates during the operation of the control device. Rotating control element circumferential areas with contours that vary in the circumferential direction are provided as control cams throughout the rotating control element. Force introduction areas KEB (6, 7), which are positioned in a non-uniform manner, and a force transfer area KUB (3) are provided on the base body (2) of the adjusting element. Switching means for the alternately M contacting assignment of the KEB areas (6, 7) are provided on the different control cam areas of the control element The aim of the invention is to enable the largest possible number of different controls for an engine valve.

Abstract: The aim of the invention is to functionally improve a hydraulic play compensation element for a valve gear of an internal combustion engine. To this end, the play compensation element is characterized by the following features. Both components (4; 6) enclose a pressure chamber (7) between them, which is sealed from the exterior and which has a volume that depends on the relative position of both components (4; 6). A pressure spring (5) that presses both components (4; 6) away from one another is mounted inside the pressure chamber (7). The pressure chamber (7) can be connected to the storage chamber (8) via a spring-loaded one-way valve (10) through which media can flow exclusively into the pressure space. An additional controllable stop valve (11) is provided in the connection of the pressure chamber (7) to the storage chamber (8). A throttling channel (17), which serves as a bypass to the one-way valve (10), is provided between the pressure chamber (7) and the controllable stop valve (11).

Abstract: A gas shuttle valve of an internal combustion engine, in which a valve plate, as a sealing element, a tubular valve shaft, as a guide element, and a thrust part, which seals the end of the valve shaft opposite to the valve cone, as a stop for a valve operating element having a support for a typical valve spring, are welded to one another, is to be produced economically, i.e., cost-effectively, while nonetheless having high finished quality.

Abstract: The invention relates to a method and to a device for opening and closing a valve of an internal combustion engine. The aim of the invention is to reduce the energy required for opening and closing a valve of an internal combustion engine, especially one that is provided with an electromagnetic valve control. To this end, the kinetic energy of the valve is transferred to a mass and temporarily stored in a mass.

Abstract: A seal of a pressure chamber, in which the pressure chamber has boundary walls movable toward one another and an annular gap, filled up by a radial seal, between a first and a second of the boundary walls, these boundary walls being implemented as seal surfaces radially contacted by the radial seal and the seal being mounted so it is axially movable in relation to both radial seal surfaces and the radial seal also radially adjoining the inside of the pressure chamber, which is subjected to pressure, predominantly without being covered and able to support itself on the opposite axial side on a support connected to one of the boundary walls, is to be able to have a pressure damping effect for pressure pulsations within the pressure chamber.

Abstract: The invention relates to a control device for an intake valve or exhaust valve of an internal combustion engine comprising an adjusting element and a control element. According to the invention, the adjusting element comprises a base body (2) and is displaceably arranged between the control element and the valve. The control element rotates during the operation of the control device. Rotating control element circumferential areas with contours that vary in the circumferential direction are provided as control cams throughout the rotating control element. Force introduction areas KEB (6, 7), which are positioned in a non-uniform manner, and a force transfer area KUB (3) are provided on the base body (2) of the adjusting element. Switching means for the alternately contacting assignment of the KEB areas (6, 7) are provided on the different control cam areas of the control element. The aim of the invention is to enable the largest possible number of different controls for an engine valve.

Abstract: The invention relates to a hollow-stem valve for an internal combustion engine. The valve has a ratio of wall thickness to stem diameter of less than 1:3. The aim of the invention is to minimize the deformation of the valve head. To this end, the valve disk rests directly against the stem.