针对内燃机汽车性能受高原地区海拔高度的影响，在分析海拔高度的改变对发动机性能影响的基础上，建立整车动力传动系统仿真模型，分析高原环境下AMT汽车动力性换挡规律。通过对最佳动力性换挡规律控制参数进行修正，提出了基于不同海拔高度的动力换挡规律制定方法，并进行了仿真验证。仿真结果表明：在高原行驶环境下，采用所提出的高原环境动力性换挡规律，明显改善了AMT汽车在高原环境行驶时的动力性能，提高了汽车高原环境适应能力。

In the plateau area, the performance of internal combustion engine vehicles will be affected by the altitude. Based on the analysis of the fact that engine performance changes with the altitude, a simulation model of AMT vehicles' power transmission system is established, and the dynamic gear shift control schedule of AMT vehicles in plateau environment is studied. By modifying the control parameters of the optimal-power shift schedule, the formulation method of dynamic shift schedule based on different altitudes is proposed and simulated. The simulation results show that the proposed plateau dynamic shift schedule can acclimatise AMT vehicles to the plateau environment, and improve the dynamic performance of AMT vehicles obviously.

U461.2

国家自然科学基金项目（51675062）；重庆市应用开发计划重大项目（cstc2015yykfc60004）。