Control valve comprising an integrated filter and cam shaft phase setter comprising said control valve

A phase setter for adjusting the rotational angular position of a cam shaft relative to a crankshaft of a combustion engine, said phase setter comprising:

• a stator which can be rotary-driven by the crankshaft;
• a rotor which can be rotary-driven about a rotational axis by the stator and can be coupled to the cam shaft in order to rotary-drive it, and which forms setting chambers with the stator which can be charged with a pressure fluid in order to be able to adjust the rotor relative to the stator about the rotational axis;
• and a control valve comprising:
• a valve housing comprising a valve inlet for the pressure fluid, control ports which are connected to the setting chambers, and a valve outlet;
• a valve piston which is moveable in the valve housing along an axis and which comprises a hollow space through which the pressure fluid flows from the valve inlet to the control ports;
• and a filter device which is arranged in the control valve and comprises a filter cross-section which filters the pressure fluid as it passes through it,
• wherein at least a part of the filter cross-section of the filter device is situated in the hollow space of the valve piston and the filter device is supported on the valve housing and protrudes into the valve piston.