双离合器变速箱换档动力学和控制

依据包含一双离分器变速箱的汽车动力传动系统的详细动力模型开发了一个集成的动力传动系的换档控制.基于换高档和换低档以及发生于变速箱相同一部分的换档控制的仿真结果证实了该控制器的工作.采用带有再现单向离合离工作目标为均匀传递发动机转矩离合器滑动的闭环控制制订了控制法则,进一步的要素是通过发动机控制和离合器压力操纵的组合对发动机速度的闭环控制.此外,它证实了变速箱换档时输出转矩的控制可增加控制的持久性以及提供了直接操纵换档品质的方法.最后讨论了通过方便的液力传动锥型同步器在总换档质量方面予选换档的动力影响.

Dynamics and Control of Gearshifts on Twin-Clutch Transmission

Based on a detailed dynamic model of an automotive powertrain containing a twin-clutch transmission, an integrated powertrain control for gearshifts is developed. The operation of this controller is demonstrated on the basis of simulation results for upshifts, downshifts, and multiple gearshifts taking place within the same half of the transmission. The control algorithm makes use of closed-loop control of clutch slip for a smooth transfer of engine torque with the aim of reproducing the operation of a one-way clutch. Further elements are a closed-loop control of engine speed through a combination of a manipulation of engine controls and clutch pressure. In addition, it is demonstrated that the control of transmission output torque during gearshifts can add robustness to the control and provides a means to manipulate directly the gearshift character. Finally, the dynamic effects of gear preselection through conventional hydraulically actuated cone-type synchronizers on the overall shift quality are discussed.