摘要
基于自动变速器的机械结构和控制原理分析发动机高转速对自动变速器非动力降档的影响,指出冲击产生的根本原因,并提出解决冲击的几种方案,分析可行性和实用性,确定最佳方案。提出有效量化冲击程度的指标,并引入AVL Drive Rating,用于对比评价冲击的剧烈程度和改善结果。对选定方案的控制模型进行优化,通过循环工况试验,得到最优输出结果和控制参数,从而改善了发动机高转速下车辆非动力降档的冲击程度,保证了整车驾驶性能。
In this paper, the impact of high engine speed to close throttle downshifl based on the mechanical structure and control principle is analyzed. Several solutions are proposed, and the best solution is decided by feasible and practical analyze. Propose effective bump criteria and use AVL Drive Rating to evaluate the severity and improvement of bump. Optimize the control model of selected solution, and get the best performance and parameter by driving cycle test. The bump issue of close throttle downshift during high engine speed is solved and the vehicle drivability is improved.
出处
《上海汽车》
2018年第11期19-23,共5页
Shanghai Auto
