An analytical simulation algorithm is developed to estimate driving performance of power train system of an electric vehicle that is propelled by the electric energy storied in a rechargeable battery. The principal theory is conservation of energy and several analytical and experimental data such as rolling resistance, aerodynamic drag, mechanical efficiency of power transmission etc are incorporated to have the simulation algorithm for the general driving performance of an electric vehicle designed. From the analytical calculation results, running resistance of a designed vehicle is obtained with the change of operating condition of a model vehicle such as inclined angle of road and vehicle speed. Tractive performance of a model vehicle with a given power train system is also calculated at each gear ratio of transmission. Through analysis of the two calculation results: running resistance and tractive performance, the driving performance of a designed electric vehicle is obtained and it will be used to evaluate feasibility of the designed power train system on the model vehicle designed.
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