Abstract: An assembly including a rotatable shaft with external splines and an annular member receiving such shaft, provided with internal splines meshing with the external splines of such shaft wherein the external splines of different segments of the shaft are configured to effectively transmit torque in use and facilitate the mounting of the shaft into the annular member in assembly.

Abstract: The invention relates to a method for operating an internal combustion engine comprising at least two cylinders respectively provided with admission valves and exhaust valves. According to the invention, in order to fill the cylinders with a larger amount of unburned gas during a gas exchange, the exhaust interval is reduced and the crossover phase of admission and exhaust intervals is extended, for at least one cylinder (3). The invention also relates to an internal combustion engine for carrying out said method.

Abstract: An apparatus for testing a tire (10), which has a center (M), a width (B1, B2) which extends in an axial direction (z) and a diameter (D1, D2) on a tire plane (RME, RME1, RME2, MBE) which is orthogonal to the axial direction (z), is provided with a measuring head (20) which can be used to scan the tire (10). The apparatus also has a positioning means (30) which can be used to position the measuring head (20) in an observation position and to align the measuring head in an observation direction. The positioning means (30) can be controlled with the aid of a control and display device (40). The control and display device (40) has at least one control panel (44, 45, 46, 47) which can be used to input the coordinates of the position of the measuring head (20). Alternatively or additionally, the control and display device (40) has at least one display panel (44, 45, 46, 47) which can be used to display the coordinates of the position of the measuring head (20).

Abstract: The invention relates to a splined-shaft connection between a hollow shaft or hub provided with an internal toothing system and a shaft provided with an external toothing system.

Abstract: The invention relates to a device for checking a tire, (6, 9), in particular, by means of an interferometric measuring method, wherein at least one first measuring probe (2) and a second measuring probe (3) are provided by means of which the tires (6, 9) can be scanned to give a measurement result. The device is further provided with a positioning means (4, 5, 7, 8), by means of which the first measuring probe (2) and the second measuring probe (3) may be displaced between a park position outside the tire (6, 9) and an observation position within the tire (6, 9). According to the invention, tires (6, 9) with a comparatively small rim diameter (d6, d9) may be checked by means of the first measuring probe (2) and the second measuring probe (3) being independently positionable in the park position or the observation position using the positioning means (4, 5, 7, 8).

Abstract: The invention relates to valve train of an international combustion engine, which comprise axially displaceable cam elements. The inventive valve train is characterized in that one cam element comprises at least two cams which in turn comprise at least two cam tracks. The first cam and the at least second cam of a cam element differ in at least one cam track.

Abstract: A non-destructive tire testing device has at least one measuring head, a positioning means for moving the measuring head between a park position (I) and a measuring position (II), a pressure chamber in which the test object can be subjected to a prescribed pressure, and a sub-frame on which the test object can be mounted during the test. The sub-frame is supported on a first vibration reducing bearing element. The pressure chamber has a hood which is supported separately from the sub-frame on a second vibration reducing bearing.

Abstract: An apparatus for testing a tyre (10), which has a centre (M), a width (B1, B2) which extends in an axial direction (z) and a diameter (D1, D2) on a tyre plane (RME, RME1, RME2, MBE) which is orthogonal to the axial direction (z), is provided with a measuring head (20) which can be used to scan the tyre (10). The apparatus also has a positioning means (30) which can be used to position the measuring head (20) in an observation position and to align the measuring head in an observation direction. The positioning means (30) can be controlled with the aid of a control and display device (40). The control and display device (40) has at least one control panel (44, 45, 46, 47) which can be used to input the coordinates of the position of the measuring head (20). Alternatively or additionally, the control and display device (40) has at least one display panel (44, 45, 46, 47) which can be used to display the coordinates of the position of the measuring head (20).

Abstract: The invention relates to a device for checking a tyre, (6, 9), in particular, by means of an interferometric measuring method, wherein at least one first measuring probe (2) and a second measuring probe (3) are provided by means of which the tyres (6, 9) can be scanned to give a measurement result. The device is further provided with a positioning means (4, 5, 7, 8), by means of which the first measuring probe (2) and the second measuring probe (3) may be displaced between a park position outside the tyre (6, 9) and an observation position within the tyre (6, 9). According to the invention, tyres (6, 9) with a comparatively small rim diameter (d6, d9) may be checked by means of the first measuring probe (2) and the second measuring probe (3) being independently positionable in the park position or the observation position using the positioning means (4, 5, 7, 8).

Abstract: A device for testing a tire with two sidewalls and a tread portion in particular by means of an interferometric measuring method, is provided with a measuring unit with which the tire can be scanned to generate a measurement result, and with a positioning means for the measuring unit. The measuring unit comprises at least three measuring heads. The first measuring head and the second measuring head are used to scan the outer surface of the sidewalls, whereas the third measuring head is used to scan the inner surface of at least the tread portion. The device enables a tire to be fully tested quickly.

Abstract: A device for testing a tire with two sidewalls and a tread portion in particular by means of an interferometric measuring method, is provided with a measuring unit with which the tire can be scanned to generate a measurement result, and with a positioning means for the measuring unit. The measuring unit comprises at least three measuring heads. The first measuring head and the second measuring head are used to scan the outer surface of the sidewalls, whereas the third measuring head is used to scan the inner surface of at least the tread portion. The device enables a tire to be fully tested quickly.

Abstract: The invention relates to a valve drive of an internal combustion engine, comprising at least one camshaft whereon at least one cam carrier is arranged in a rotationally fixed and axially displaceable manner. Means for applying axial tension are formed between the at least one camshaft and the at least one cam support, thereby enabling the at least one cam support to be fixed in an axial manner.

Abstract: A device for testing a test object in particular a tire (10) by means of a non-destructive measuring method is provided with at least one measuring head (20) by which the test object (10) can be scanned to produce a measurement result. The device is also provided with a positioning means (30) by which the measuring head (20) can be moved between a park position (I) and a measuring position (II). The device is also provided with a pressure chamber in which the test object (10) can be subjected to a prescribed pressure. The device is further provided with a sub-frame (60) on which the test object (10) can be mounted during the test. The sub-frame (60) is supported on a first bearing element (61) by means of which the transmission of vibrations from a base (70) to the sub-frame (60) can be reduced.

Abstract: The invention relates to a method for operating an internal combustion engine comprising at least two cylinders respectively provided with admission valves and exhaust valves. According to the invention, in order to fill the cylinders with a larger amount of unburned gas during a gas exchange, the exhaust interval is reduced and the crossover phase of admission and exhaust intervals is extended, for at least one cylinder (3). The invention also relates to an internal combustion engine for carrying out said method.

Abstract: The invention relates to valve train of an international combustion engine, which comprise axially displaceable cam elements. The inventive valve train is characterized in that one cam element comprises at least two cams which in turn comprise at least two cam tracks. The first cam and the at least second cam of a cam element differ in at least one cam track.

Abstract: The invention relates to a valve drive of an internal combustion engine, comprising at least one camshaft whereon at least one cam carrier is arranged in a rotationally fixed and axially displaceable manner. Means for applying axial tension are formed between the at least one camshaft and the at least one cam support, thereby enabling the at least one cam support to be fixed in an axial manner.

Abstract: The invention relates to a variable valve train for reciprocating engines, in particular internal combustion engines comprising at least one cam of a camshaft that is rotatably mounted in the cylinder head. Said cam actuates a lift valve using a pulley assembly which can be displaceably guided in a sliding-block part along an adjusting inclined plane, together with a valve actuating element which is connected in series. The valve stroke can be adjusted in a variable manner in relation to the cam by the displacement of the sliding-block part and the pulley assembly is elastically pre-tensioned in relation to the cam. To achieve a sturdy valve train which exhibits uniform valve accelerations, a free travel (s) that allows an excitation movement of the pulley assembly is provided between the cam heel and the valve actuating element.

Abstract: The invention relates to a variable valve train for reciprocating engines, in particular internal combustion engines comprising at least one cam of a camshaft that is rotatably mounted in the cylinder head. Said cam actuates a lift valve using a pulley assembly which can be displaceably guided in a sliding-block part along an adjusting inclined plane, together with a valve actuating element which is connected in series. The valve stroke can be adjusted in a variable manner in relation to the cam by the displacement of the sliding-block part and the pulley assembly is elastically pre-tensioned in relation to the cam. To achieve a sturdy valve train which exhibits uniform valve accelerations, a free travel (s) that allows an excitation movement of the pulley assembly is provided between the cam heel and the valve actuating element.

Abstract: A measurement system is used in particular to detect defects in test objects. To that end, the test object is lighted from a lighting unit that includes a plurality of laser diodes. The beam cones of the individual laser diodes generate a common lighting spot on the test object. The object being measured is observed interferometrically, where the interferometer is part of a measurement head. An electronic pattern sensor detects interference patterns generated by the interferometer.