Gear ratio optimization of two-speed transmission in electric off-road vehicle

This paper presents the optimization gear ratio for an electric off-road vehicle equipped with two-speed Transmission, aiming at improving the fuel economy and dynamic performances. The power of the electric off-road vehicle is taken as the constraint condition, and the optimization goal is to achieve the lowest energy consumption of the entire vehicle by optimizing the transmission ratio of the transmission while satisfying the constraints of the power. According to the overall optimization, the optimal two-speed transmission gear ratio is obtained. It will also compare the energy consumption of the electric engineering vehicle with fixed gear ratio retarder under the same driving cycle.