Hydraulic System

A hydraulic system having a hydraulically actuatable working cylinder which has a cylinder housing with a piston rod unit which is guided in longitudinal movement therein, is actuatable in opposite directions and subdivides the cylinder housing into a piston chamber and a rod chamber, and having two proportional pressure control valves, of which one is assigned to the piston chamber and the other is assigned to the rod chamber, wherein a connecting line is connected in a fluid-conducting connection between the rod chamber and the proportional pressure control valve assigned to the rod chamber, said connecting line being guided to an inlet side of the proportional pressure control valve for the piston chamber such that, when the piston rod unit is extended, the fluid displaced from the rod chamber passes into the piston chamber of the cylinder housing.

A method for operating a hydraulic system, wherein, using a computer control system and sensors connected thereto, such as pressure sensors, both a piston side and a rod side of the working cylinder can be monitored to establish whether an actuating force to be set has also been reached, this force being designed to be limited insofar as an associated maximum pressure to be set on the piston side corresponds to a maximum pressure on the rod side, which in turn corresponds to the supply pressure of the pressure supply source.