基于品质评价分析的AT换挡过程研究

针对AT现有换挡过程控制缺乏品质控制理论分析展开研究，建立AT换挡过程动力学模型，以某重型越野车辆动力传动系统为研究对象，采用冲击度和滑摩功分别对升挡过程转矩相和惯性相进行特性分析，指出转矩相临界时间MAP图以及惯性相涡轮速度过渡“凹”曲线能改善换挡品质，并制定相应的控制策略.仿真分析和实车试验结果验证了品质特性分析的正确性，能够有效改善换挡品质，提高整车性能. 

Gear Shift Control Analysis Based on Quality Evaluation for AT

Researches were carried out for the lack of theoretical analysis of shift quality of current shift control for AT. First a transient dynamic model of AT was built. Then taking the power train of heavy-duty off-road vehicle as an example, an evaluation method with shift jerk and slipping work was presented to analyze the characteristic of torque phase and inertia phase in the ascending shift process. The analysis results show that the minimum time MAP of torque phase and the concave trajectory of turbine speed in inertia phase can help to improve shift quality. Following the corresponding phased control strategy was proposed. Simulation and real vehicle test results verify the correctness of quality analysis method, and show that it can improve the shift quality for AT.