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

A device for changing a relative angular position of a camshaft with respect to a crankshaft of an internal combustion engine, comprising:

• a drive element driven by the crankshaft, wherein the drive element is mounted rotatably about the camshaft, and wherein at least two hydraulic chambers are formed between the drive element and the camshaft, wherein the hydraulic chambers are pressurizable with a pressurized fluid in order to set a defined relative rotational position between the drive element and the camshaft;
• a housing element, in which means for controlling the flow of the pressurized fluid are arranged;
• and
• a pressure reservoir having a pressure chamber for pressurized fluid, the pressure reservoir being substantially cylindrical, the pressure reservoir being arranged on the housing element so that a cylindrical lateral face of the reservoir abuts a lateral portion of the housing element, at least one fluid connection being formed between the housing element and the pressure chamber of the pressure reservoir,
• wherein the housing element and a housing of the pressure reservoir are formed as a one piece part.