Skid steered all terrain vehicle

A skid steered all terrain vehicle (ATV), comprising:

• a plurality of tracks located at each side of the vehicle;
• an engine;
• two driving units connected to and driven by the engine, each driving unit being operable to drive the tracks on one side of the vehicle;
• a driver throttle lever or pedal;
• a differential gearbox configured to produce a differential speed of the two driving units related to a steering angle of a steering input to the differential gearbox regardless of a surface condition on which the vehicle is driven;
• a steering drive configured to act on the differential gearbox, the steering drive including a hydraulic pump, a hydraulic steering motor, a hydraulic circuit connecting the hydraulic steering motor and the hydraulic pump, a steering valve connected to the hydraulic steering motor, and a priority valve, the priority valve being configured to mechanically control a flow volume to control a steering pressure value of the hydraulic circuit needed to generate a required differential speed of the tracks, the priority valve controlling the flow volume to cause a pressure difference across the steering valve to remain constant;
• a steering pressure sensor operable to detect the steering pressure value;
• and
• an engine torque controlling device with an electronic throttle control system connected to the engine and to the driver throttle lever or pedal, the electronic throttle control system compensating for a torque needed for steering efforts in accordance with the detected steering pressure value so as to control an electronic throttle and to compensate for an engine torque, wherein by compensating for the torque needed for steering efforts the electronic throttle control system is operable to ensure that the engine keeps a vehicle driving speed substantially constant during steering without an input to the driver throttle lever or pedal.