动力保持型三挡AMT动力学特性  

Dynamic characteristics of a three-speed uninterrupted powertrain AMT

作　　者：李飞[1,2] 宋健 方圣楠[1] 宋海军[1] NGUYEN Truong Sinh[1] LI Fei;SONG Jian;FANG Shengnan;SONG Haijun;NGUYEN Truong Sinh(State Key Laboratory of Automotive Safety and Energy,Tsinghua University,Beijing 100084,China;Department of Mechanized Infantry,Shijiazhuang School of Army Infantry Academy,Shijiazhuang 050083.China)

机构地区：[1]清华大学汽车安全与节能国家重点实验室,北京100084 [2]陆军步兵学院石家庄校区机械化步兵系,石家庄050083

出　　处：《清华大学学报（自然科学版）》2021年第1期1-10,共10页Journal of Tsinghua University(Science and Technology)

摘　　要：该文研究了纯电动客车动力保持型三挡电控机械式自动变速器(AMT)的动力学特性,该AMT可消除换挡时的动力中断。利用Lagrange方程,建立动力保持型三挡AMT动力学模型;采用MATLAB/Simulink,对安装动力保持型三挡AMT和未安装变速器的目标车型,作了加速、减速全过程仿真和动力性对比;通过模型得到换挡过程中离合器、制动器的力矩曲线,分析了驱动电机输入转矩和主减速器输出转矩;结合动力学方程,验证了换挡过程动力保持的可行性。结果表明:安装动力保持型三挡AMT,有助于改善纯电动客车的动力性,实现换挡时的动力保持。This study analyzes the dynamic characteristics of a three-speed uninterrupted powertrain automatic mechanical transmission(AMT)for an electric bus.The AMT structure reduces the power interruption during shifting.A Lagrange equation is developed for the three-speed uninterrupted powertrain AMT that includes the target vehicle performance characteristics.The model is solved in MATLAB/Simulink to compare the performance characteristics of the target vehicle with this three-speed uninterrupted powertrain AMT and without a transmission with simulations of the entire acceleration and deceleration ranges of the target vehicle.The model predicts the clutch and brake torque curves during shifting and predicts the drive motor input torque and final output torque.The dynamic equations are also used to verify the feasibility of power recovery during shifting.The results show that the three-speed uninterrupted powertrain AMT improves the vehicle dynamics of electric buses and maintains power during shifting.

关 键 词：纯电动客车 动力保持 三挡自动变速器(AMT) 动力学特性 

分 类 号：U463.51[机械工程—车辆工程]