Device for changing timing of gas exchange valves of internal combustion engine has control valve in first position of which neither first nor second working connection of control valve communicates with feed connection

摘要

The device for the changing of the timing of gas exchange valves of an internal combustion engine comprises a hydraulic adjusting device with two opposite acting pressure chambers, and a control valve (103) consisting of a valve component (114) and operating unit by which the control valve can be brought into several control positions. In a first position of the control valve which corresponds to the control position of a non-activated operating unit, neither the first working connection (A) nor the second working connection (B) of the control valve communicates with its feed connection (P).