HYDROSTATIC TRANSMISSION FOR A WORK VEHICLE PROVIDED WITH A SPEED AND PRESSURE BASED CONTROL SYSTEM

The hydrostatic transmission (100) for a work vehicle (10) comprises: a hydraulic pump (30) coupled to an internal combustion engine (28) and an electronically controlled variable displacement hydraulic motor (32) connected to driving wheels (16), jointly defining a closed hydraulic circuit (1); a first pressure sensor (111), a second pressure sensor (112) and a speed sensor (113) to sense, respectively, the pressure (p) on a forward line (101), the pressure (p) on a rearward line (102) and the speed (u) of the vehicle (10); and an electronic control unit (ECU) configured to set a commanded displacement (V) of the hydraulic motor (32) equal to the greater of a first displacement (V) and a second displacement (V); wherein the first displacement (V) is a function of the pressure (p) on the forward line (101) if the vehicle (10) is moving forward, or the pressure (p) on the rearward line (102) if the vehicle (10) is moving rearward; and wherein the second displacement (V) is a function of the speed (u) of the vehicle (10).