Device for varying the relative angle position of a camshaft with respect to a crankshaft of an internal combustion engine

A device for varying the relative angle position of a camshaft with respect to a crankshaft of an internal combustion engine, comprising:

• a drive element driven by the crankshaft;
• a rotor connected to the camshaft in a non-rotatable manner;
• at least two hydraulic chambers between the drive element and the rotor and actable upon by a hydraulic fluid in order to set a defined relative rotational position between the drive element and the rotor;
• a control valve having a valve housing adapted to dimensions of a bore in the camshaft or the rotor, the control valve of substantially hollow cylindrical form and arrangeable in the bore;
• a control piston arranged in an axially displaceable manner in the valve housing;
• and
• a circlip for fixing the valve housing in the camshaft or in the rotor in a form-fitting manner, the circlip having at least one radially extending circumferential portion designed to engage with an annular groove arranged in the camshaft or in the rotor in an axial end region of the camshaft or the rotor, the circlip having at least one axially extending retaining portion, the control piston having an annular groove in a control piston face region, which is designed for the engagement of at least one axially extending retaining portion, and the valve housing in a valve housing face region having at least one hook for engaging behind at least one circumferential portion of the circlip.