纯电动轿车传动系统匹配仿真与优化研究

Research on Matching Simulation and Optimization of Pure Electric Vehicle Drive System

纯电动轿车传动系统参数的合理匹配和优化设计对提高其动力性能和续航里程至关重要。以某款宜接挡微型纯电动轿车为研究对象,根据其动力性能和续航要求,对动力传动系统的关键部件进行初步的设计匹配;用ADVISOR建立更适应微型纯电动轿车行驶道路情况的组合工况,在该组合工况下对车辆的动力性和续航里程进行仿真;在50 km/h的等速工况下对其续航里程进行仿真;为了提高续航里程,利用遗传算法对传动系传动比进行优化。仿真结果表明,优化后车辆的续航里程得到了明显提升,动力性也满足整车性能的要求。

Reasonable matching and optimizing design of pure electric vehicle are of great significance to improve its dynamic property and endurance mileage.This article takes a certain one-speed transmission mini pure electric vehicle as the research object.According to its dynamics and mileage requirements,the key components of the drive system are preliminary designed and matched.ADVISOR is utilized to establish a combined driving cycle that is more suitable for the road conditions of the mini pure electric vehicle,and simulate its dynamic property and endurance mileage under the constant speed condition of 50km/h independently.Then,this article optimizes the final drive ratio by genetic algorithm.Again,the simulation result shows that the mileage requirements of the optimized vehicle are significantly improved,and the dynamic property also meets the vehicle performance requirements.