电动汽车无动力中断两挡变速器换挡机构参数优化

针对电动汽车无动力中断两挡变速器,提出一种换挡机构参数优化匹配方法。介绍了该两挡变速器换挡机构,并分析了其换挡工作过程。建立了整车动力学模型,研究了换挡机构参数对冲击度和滑摩功的影响规律。在此基础上,对换挡机构参数进行初步匹配,进一步建立了以换挡机构参数为优化变量,以冲击度和滑摩功为优化目标的多目标优化模型。利用改进灰狼算法,结合MATLAB/Simulink仿真对所建模型进行了求解,并通过案例验证了该算法的有效性。最后,搭建了两挡变速器换挡试验台架,结果表明其换挡过程动力不中断,证明了该两挡变速器换挡机构的合理性。     

面向低能耗的纯电动汽车两挡变速系统综合换挡规律

为了协调纯电动汽车动力性和经济性之间的矛盾,针对一种两挡变速系统,提出能够兼顾两种性能的综合换挡规律。首先,基于经济性驱动模式提出面向低能耗的需求转矩获取策略。在此基础上,制定两挡变速系统的最佳动力性换挡规律和最佳经济性换挡规律。以百公里加速时间和比能耗为目标,建立综合性能换挡规律优化模型,通过交叉粒子群算法求解得到换挡规律曲线。利用MATLAB/Simulink仿真平台对三种换挡规律的动力性能和经济性能进行对比分析,结果表明,综合性能换挡规律能够在动力性能方面逼近最佳动力性换挡规律,同时表现出很好的经济性能。     

[电动汽车稳定性控制]面向低能耗的纯电动汽车两挡变速系统综合换挡规律

In order to coordinate the contradiction between the dynamic performance and the economic performance of PEVs, this paper proposed a comprehensive shift schedule based on a two-speed PEV powertrain. Firstly, the strategies of obtaining the torque for low energy consumption were presented under the economic performance mode. Then the dynamic shift schedule and the economy shift schedule for a two-speed powertrain were formulated. The optimization model of comprehensive shift schedule was established with the objectives of the acceleration time during 0~100 km/h and the energy consumption per unit mass. And then the model was solved by the crossover particle swarm optimization algorithm to obtain the shift schedule curves. Three kinds of shift schedule were compared and analysed by using MATLAB/Simulink platform. Results show that the comprehensive shift schedule for low energy consumption may balance the dynamic performance and the economic performance of PEVs.