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.