Control valve for a camshaft adjuster

A control valve for a hydraulic camshaft adjuster, comprising:

• a housing and a control piston mounted in a receiver of the housing;
• a plurality of openings provided on an inner casing surface of the receiver, at least one of the plurality of openings assigned to an inlet port P, a supply port A, a supply port B or a supply port C;
• the control piston including a first control groove, a second control groove and a third control groove, either of the first, second, or third control grooves connected to at least two of the plurality of openings of the housing depending on a position of the control piston relative to the housing;
• the first control groove configured to be brought into fluid-conductive connection with a first inlet opening assigned to the inlet port P and with an opening assigned to the supply port A;
• the second control groove configured to be brought into fluid-conductive connection with an opening assigned to the supply port A and/or with an opening assigned to the supply port B and/or with an opening assigned to the supply port C;
• the third control groove configured to be brought into fluid-conductive connection with the first inlet opening or a second inlet opening assigned to the inlet port P and with an opening assigned to the supply port B;
• the first control groove and the third control groove enclose the second control groove;
• and
• in a first switch position of the control piston, the third control groove is in fluid-conductive connection with the inlet port P and the supply port B, and the second control groove is in fluid-conductive connection with the supply port C and the supply port A;
• and
• in a second switch position of the control piston, the first control groove is in fluid-conductive connection with the inlet port P and the supply port A, and the second control groove is in fluid-conductive connection with the supply port C and the supply port B.