Patent ID: 8302395

Claim:
A hydraulic system for actuating a belt-driven conical-pulley transmission of a vehicle, the transmission having a torque sensor and providing a variably adjustable transmission ratio, said hydraulic system comprising: a hydraulic energy source operatively connected with the torque sensor for supplying a working medium; a torque sensor working medium inlet that is supplied with working medium by a first flow from the hydraulic energy source; a disconnection valve connected between the hydraulic energy source and a torque sensor working medium outlet for selectively connecting and disconnecting a second flow of working fluid from the hydraulic energy source to the torque sensor working medium inlet, depending on need; wherein the disconnection valve is connected via a first control pressure line to the torque sensor working medium outlet for providing a pressure for disconnecting the second flow from the hydraulic energy source and for connecting the second flow to a working medium reservoir; and including a pressure conversion valve connected into the first control pressure line.