基于CAN总线的双离合器式自动变速器综合控制

开发用于轿车的双离合器式自动变速器电控单元(TCU)的总线系统,应用网络分析工具CANoe搭建系统CAN网络节点的仿真平台。对网络的拓扑结构、应用层数据定义及总线波特率进行了仿真与优化,并根据仿真结果分析总线运行情况。提出轿车电动干式双离合器的综合控制策略,整车试验结果表明通过CAN总线使TCU与ECU之间进行实时通信,对发动机、双离合器和变速箱三者进行综合控制,能够有效提高DCT轿车的换档品质,实现动力换档。

Synthetic Control of DCT Based on Controller Area Network

A controller area network is developed for the electronic control unit of a car equipped with the dry-type DCT system. A simulation platform for CAN network nodes is built firstly by CANoe which is a network analysis tool. Then the platform is used to simulate and optimize the network topologies, data definitions of application layer and baud rate. The simulation result shows that the bus is running in good condition. Finally, a synthetic control strategy is applied to the car. The vehicle test result is presented and it proves that the double-clutch, gearbox and engine are cooperatively controlled effectively for reducing the jerk and improving the car＇s shift quality during the shift processes through the real-time communication between the TCU and ECU.