Patent ID: 8534242

Claim:
A device for variably adjusting timing control of gas exchange valves of an internal combustion engine, comprising: a hydraulic phase adjustment device; a control valve; and an auxiliary pressure source, the phase adjustment device being drivingly connected to a crankshaft and a camshaft, and the phase adjustment device having at least two counter-working pressure chambers, and a phase relation of the camshaft relative to the crankshaft being variably adjustable by charging of the pressure chambers with pressure medium, the control valve having at least one inflow port and a first working port and a second working port, the inflow port being connectable to a pressure medium pump, and the first working port being connectable to the first pressure chamber and the second working port being connectable to the second pressure chamber, wherein the control valve has a secondary inflow port which is connectable to the auxiliary pressure source, and the control valve can be moved to a first control position in which both the pressure medium pump and the auxiliary pressure source are connected to the first pressure chamber.