Patent ID: 8511346

Claim:
A control valve for a device for variable setting of control times of gas exchange valves of an internal combustion engine, comprising: a valve housing of hollow construction having at least one inlet port, at least one outlet port and at least two working ports; and a hydraulic fluid conduction insert of hollow construction arranged in the valve housing, with hydraulic fluid conduction channels arranged in a wall of the hydraulic conduction insert and communicating with the working ports, and a control piston arranged in the hydraulic fluid conduction insert, wherein the hydraulic fluid conduction insert comprises a guide sleeve, in which the control piston is guided, the guide sleeve comprising a plastics injection-molded encapsulation, in which as least two of the hydraulic fluid conduction channels are arranged, and a filter fabric is provided between the plastics injection-molded encapsulation and the guide sleeve, where the filter fabric is a complete cylinder and is arranged at least partially over the guide sleeve.