| 摘要 |
The invention relates to a device for variably setting the control times of gas exchange valves of an internal combustion engine comprising a hydraulic actuator (18) with two reciprocally operating pressure chambers (12, 13) and with a pressure medium supply device (32) for supplying and withdrawing pressure medium to or from the pressure chambers (12, 13). The device (1) also comprises at least one rotation angle limiting device (24 that, in an unlock state, does not limit the phase position of the output element (3) relative to the input element (2) but, in a locked state, limits it to a defined angular range or to a defined angle. The rotation angle limiting device (24) is transferred from the locked to the unlocked state by supplying pressure medium. A control line (19) is provided for supplying and withdrawing pressure medium to or from the rotation angle limiting devices (24), the control line (19) not communicating with the pressure medium supply device (32). A control valve (38) controls the supply and withdrawal of pressure medium to and from the control line (19). The control valve (38) comprises a hydraulic actuating mechanism (39) that is subjected to the action of pressure medium by the pressure medium supply device (32). |
