Patent ID: 8733306

Claim:
Control valve of a device for changing a relative angular position of a camshaft with respect to a crankshaft of an internal combustion engine, the control valve comprising: a valve housing with a control piston movable within a bore in the valve housing, and in an area facing the camshaft, a supply fluid line for feeding fluid under pressure into the valve housing, in an axial middle area, two working fluid lines in the valve housing for feeding fluid under pressure to and for discharging fluid under pressure from at least two hydraulic chambers operatively arranged between a drive element and the camshaft, in order to adjust a defined relative rotational position between the drive element and the camshaft, and in an area facing away from the camshaft, a discharge fluid line for discharging fluid to a tank, the discharge fluid line is constructed for discharging the fluid in a hollow cylindrical section of the valve housing and is formed as at least one recess extending in a radial direction and through the hollow cylindrical section of the valve housing to an outside of the section.