Patent ID: 8684041
Filing Date: 2014-04-01
Classification: F01L,F16K,Y10T

Abstract:
1. Control valve for a device for variably adjusting the valve timing of gas-exchange valves in an internal combustion engine, comprising: a valve housing, which is arranged within a surrounding construction, a control piston, which is arranged within the valve housing, an annular groove, which extends in a peripheral direction of the valve housing, is formed on the valve housing, with pressurized medium flowing through the groove, a non-return valve arranged in the annular groove with two flexible annular closing bodies, the non-return valve further has an annular frame, which is adapted to a shape of the annular groove and in which one axial, annular end of each of the annular closing bodies is held with an opposite, free annular end of each of the closing bodies extending in an axial direction, and there are a plurality of stops comprising axial extending supports that are spaced apart by recesses, which limit a closing movement of the closing bodies, and the two closing bodies are arranged and constructed so that the free annular ends overlap in the axial direction in a blocked state of the non-return valve.