Servohydraulic drive

A servohydraulic drive, comprising:

• a hydrostatic displacement machine having a stroke volume;
• a hydraulic adjustment device configured to adjust the stroke volume;
• an electric machine that is mechanically speed-coupled with the displacement machine;
• a hydraulic cylinder that is fluidically connected to the displacement machine via a first working line and a second working line, the hydraulic cylinder configured to be activated by reversal of the fluid flow through the displacement machine in opposite directions;
• a low-pressure hydraulic accumulator that is preset to a low pressure and fluidically connected via a valve assembly in each case to one of the first and second working lines in which the lower pressure prevails;
• and
• a supply unit including a switching valve configured to supply the adjustment device with pressurized fluid having an actuating pressure sufficient to adjust the hydraulic adjustment device, the supply unit configured to supply the actuating pressure independently of a present pressure in the first and second working lines, the switching valve having (i) a first switching position in which the hydraulic adjustment device is subjected to the actuating pressure and (ii) a second switching position in which the hydraulic adjustment device is relieved of pressure to a pressure that is less than a minimum actuating pressure,
• wherein, in the second switching position, a first port of the switching valve connected to the hydraulic adjustment device is open to a second port of the switching valve connected to a relief fluid path leading to the low-pressure hydraulic accumulator.