Method and device for determining a torque, and agricultural towing vehicle

A device for determining a torque acting at a position of a drive train of an agricultural towing vehicle, comprising:

• a hydraulic valve for controlling a clutch of the drive train between a closed state and an open state;
• a first rotational speed sensor for capturing a drive-side rotational speed at the clutch;
• a second rotational speed sensor for capturing an output-side rotational speed) at the clutch;
• and
• a control unit configured to:
• control the clutch in the direction of the open state;
• determine, during controlling the clutch in the direction of the open state, a difference between the rotational speeds on the drive and output sides;
• compare the difference with a predetermined difference limit value;
• capture the value of a physical variable that causes the clutch control on the basis of the comparison result;
• and
• determine the torque on the basis of the captured value of the physical variable.