传动比, 电动汽车, 动力性, 能量利用率

In connection with the problems to select the transmission number and ratio of pure electric vehicles,according to the requirements of road conditions in Chinese cities and in the case of parameters of electric drive motor and electric vehicle were set,taking the transmission ratio as a variable, the transmission ratio range which can meet the demands of power performance was defined preliminarily after the theoretical basis of the definition of transmission gear number was analyzed.Taking energy efficiency optimization as target, optimization of the transmission ratio of electric vehicles was studied and a visual optimization design method was established finally. Practical applications

show that the proposed method can design the number and the transmission gear ratio

for a pure electric vehicle which will meet the requests of road conditions and achieve

the optimal efficiency of energy utilization.

transmission ratio, electric vehicle, power, efficiency of energy utilization