Abstract: A camshaft for an internal combustion engine has a fundamental shaft which has a first toothing designed as external toothing and has at least one cam element which is arranged on the fundamental shaft and has a second toothing designed as internal toothing, The cam element can be displaced in the axial direction relative to the fundamental shaft and is connected to the fundamental shaft in a rotationally fixed manner via the toothings. At least one of the toothings has teeth whose respective tooth width varies in the axial direction of the fundamental shaft.

Abstract: A camshaft for an internal combustion engine has a fundamental shaft which has a first toothing designed as external toothing and has at least one cam element which is arranged on the fundamental shaft and has a second toothing designed as internal toothing, The cam element can be displaced in the axial direction relative to the fundamental shaft and is connected to the fundamental shaft in a rotationally fixed manner via the toothings. At least one of the toothings has teeth whose respective tooth width varies in the axial direction of the fundamental shaft.

Abstract: In a phase adjustment device, in particular a valve train phase adjustment device, with a phase adjusting unit comprising a housing part, an input drive and an output drive which is phase-adjustable with respect to input drive and with a control actuator for controlling a base unit extending partially into the housing part, wherein the phase adjusting unit comprises a valve unit actuatable by the control actuator and having a valve housing in the form of a mounting screw by means of which the output drive is connected for rotation with a drive shaft, the valve housing is provided at its free end with a contoured recess for receiving a tightening tool, which has a corresponding outer contour for the transmission of tightening torques and also accommodating part of a valve spool.

Abstract: In an arrangement comprising at least one operating unit of a camshaft adjusting device for an internal combustion engine, the operating unit and at least one ventilation unit of a ventilation device are combined in an assembly module.

Abstract: A method for testing the function of a hydraulic valve (1) and a test stand (31) for carrying out the method are proposed. The method is distinguished in that a pressurized gaseous medium is used as a test medium.

Abstract: In an arrangement comprising at least one operating unit of a camshaft adjusting device for an internal combustion engine, the operating unit and at least one ventilation unit of a ventilation device are combined in an assembly module.

Abstract: In a camshaft adjustment device for an internal combustion engine, with at least one sensor unit and one actuator unit, at least two functional units are supported on a common carrier unit and combined into a module for mounting on the internal combustion engine.

Abstract: In a camshaft adjustment device for an internal combustion engine, with at least one sensor unit and one actuator unit, at least two functional units are supported on a common carrier unit and combined into a module for mounting on the internal combustion engine.