CANFD协议在故障诊断中的研究与应用

Research and Application of CANFD Protocol in Fault Diagnosis

CAN总线在汽车领域运用越来越多,汽车内部出现更多辅助系统和人机交互系统使得总线对传输速率和带宽方面要求越来越高,在汽车电控故障诊断系统中,故障数量和分类越来越多,传统CAN的UDS诊断协议在进行大数据量的故障诊断时有一定的局限性。本文基于CANFD协议可以提升数据段的波特率和传输数据量的两大特点,将故障诊断系统中网络层和应用层协议研究于应用。

As the CAN is applied more frequently in the automotive field,more auxiliary systems and human-computer interaction systems are equipped into the car,which makes the bus more and more required for the transmission rate and bandwidth.In the automotive electronic control fault diagnosis system,there are more and more classifications and faults,and the traditional CAN UDS diagnostic protocol has certain limitations in the aspect of fault diagnosis by large data volume.This paper is based on the CANFD protocol,which can improve the baud rate of the data segment and the transmitted data volume as the two major characteristics,to do the research so that on the network layer and the application layer protocol in the fault diagnosis system it can be applied.