Method and device for determining a driving parameter and method and device for controlling a drive train of a vehicle

The method involves determining steering angle (110) of vehicle (100) based on a turning rate (245) of the vehicle. The rotation speeds of two opposed wheels (102,104,106,108) are determined based on turning rate to determine differential rotation speed. The slippage of two opposed wheels of vehicle is determined based on steering angle and differential rotational speed. Independent claims are included for the following: (1) a method for controlling powertrain of vehicle; (2) a device for determining driving parameter of vehicle; and (3) a computer program product for determining driving parameter of vehicle.