双离合器式自动变速器换档优化控制研究

摘要

The friction problem in the process of car shift was studied to reduce the friction loss. Aiming at the problem that in the shift process of double clutch type automatic transmission, pressure waves heavily, causing the output torque fluctuating violently and large friction loss, the paper put forward a shift optimization control strategy of dual clutch type automatic transmission. By establishing a double clutch dynamic model and physical shift rule mod-el, the optimized P1D pressure control algorithm was used to control the pressure changes in the process of the shift, make the pressure reach an optimal control state and reduce hardware friction. The experimental results show that the optimization control strategy can sharply reduce the friction consumption in shift process.%研究汽车换挡过程中的摩擦问题,降低摩擦损耗.针对双离合器式自动变速器换档过程,压力突变很大,造成车辆的输出转矩发生剧烈波动,硬件摩擦损耗很大的问题,提出一种双离合器式自动变速器换档优化控制策略,通过建立双离合器物理动力学模型和构建换档规律模型,运用优化的压力控制PID算法,控制在汽车换挡过程中的压力变化,使得压力能够达到一个最优的控制状态,减少硬件摩擦.实验结果表明,换档优化控制策略能够大幅降低换挡过程的摩擦消耗,取得了不错的效果.