Hydrostatic travel drive and method for controlling the hydrostatic travel drive

A method for limiting an outlet pressure of a hydraulic pump of a travel drive that includes (i) the hydraulic pump, which is coupled to a drive machine and configured to supply pressure medium to a hydraulic motor of the hydrostatic travel drive, the hydraulic motor coupled to an output of the hydrostatic travel drive, the hydraulic pump having an actuating cylinder that includes at least one cylinder chamber and is configured to adjust a swept volume of the hydraulic pump, (ii) at least one electrically activatable pressure valve configured to charge the at least one cylinder chamber with an adjustingly active actuating pressure, and (iii) an electronic control unit configured to limit a pressure of the hydraulic pump, and an actuating pressure model, the method comprising:

• determining, with the electronic control unit, a necessary actuating pressure according to a speed request from a characteristic map of the hydraulic pump in the actuating pressure model, the characteristic map representing the actuating pressure as a function of the outlet pressure and at least one of a swept volume of the hydraulic pump and of a variable of the hydraulic pump representative of the swept volume;
• and
• controlling the actuating pressure with the electronic control unit so as to limit the outlet pressure of the hydraulic pump using the determined necessary actuating pressure.