REGULATING DEVICE AND METHOD FOR CONTROLLING THE TORQUE OF A DRIVE SHAFT OF A HYDROSTATIC MACHINE

摘要

The invention relates to a method and device for controlling a torque of a drive shaft (4) of a hydrostatic machine (5). The hydrostatic machine (5) has an adjusting device for setting the displacement volume of the hydrostatic machine (5). The method comprises the following steps: A target torque is specified and a set displacement volume of the hydrostatic machine (5) is detected. A volumetric flow rate into or out of the adjusting device is controlled by means of a control valve (19) on the basis of a force difference between a control force and a force acting on the control valve (19) in the opposite direction in order to set the displacement volume. The control force is determined according to the detected displacement volume and the detected target torque. The force acting on the control valve (19) in the opposite direction is a hydraulic force, which is produced by the pressure acting on the high-pressure side of the hydrostatic machine (5).