电动汽车两档机械自动变速器控制器设计

Controller for automatic mechanical transmission with two tranches for electric vehicle

针对目前电动汽车的选换挡品质欠佳和经济性低的问题,提出了新型电控式机械两档自动变速器设计。该变速器基于电动汽车电控式机械自动变速器控制器的结构以及工作原理,采用直流有刷电机作为电控式AMT控制器的执行选换档电机,选用了Freescale公司的MPC5634单片机设计了变速器控制器硬件电路,并通过分析电控式AMT的基本控制方式,设计了控制器的主程序以及各个子模块程序,增加了CAN通信模块和串口通信模块来实现电控式AMT控制器与整车系统的数据传输,最后对控制器进行了台架换档试验。实验结果表明:所设计的控制器能很好地实现选换档操作功能,且性能稳定。

Aiming at the problems of poor quality and low economy of gear shifting of electric vehicle,the new type of electronically controlling AMT was proposed. The transmission was based on the structure and principle of normal AMT. The DC brush motor was used as a select and shift gear motor of electronically controlling AMT. Therefore,MPC5634 microcontroller from Freescale was selected to design the hardware circuit of the transmission controller,and the main program and various sub-module programs of the controller were designed by referring to the basic control mode of normal electronically controlling AMT,and the CAN communicating module and serial communicating modules for achieving the data transferring between ECU and the controller of the electronically controlling AMT were added. The bench tests of gear shifting of the controller indicates that the design of the controller can be an efficient shifting operation and a stable performance.