电动汽车EMT系统分析与故障诊断研究  

Analysis of EMT System and Study of Its Fault Diagnosis for Electric Vehicles

作　　者：朱碧辉[1] 刘成武[1] 刘珂路[1] 姚胜华[1] 杨朝阳[1] 佘建强[2] 刘晓燕[2] 夏佳磊[2] Zhu Bihui;Liu Chengwu;Liu KeLu;Yao Shenghua;Yang Chaoyang;She Jianqiang;Liu Xiaoyan;Xia Jialei(Hubei Key Laboratory of Automotive Power Train and Electronic Control, Hubei University of Automotive Technology, Shiyan 442002, China;Technology Center, Dongfeng Motor Corporation, Wuhan 430058, China)

机构地区：[1]湖北汽车工业学院汽车动力传动与电子控制湖北省重点实验室,湖北十堰442002 [2]东风汽车公司技术中心,湖北武汉430058

出　　处：《湖北汽车工业学院学报》2017年第1期28-32,37,共6页Journal of Hubei University Of Automotive Technology

基　　金：国家科技支撑计划项目(2013BAG09B00);湖北省科技支撑计划项目(2014BAA062)

摘　　要：介绍了一种用于电动汽车的电控机械式自动变速器(EMT)的系统结构和工作原理。根据电动汽车的电机控制策略、EMT的换档执行机构特点,分析了EMT系统的各种故障和故障原因。并基于CAN网络应用层UDS协议开发了EMT故障诊断界面。该EMT故障诊断系统的功能有效性通过电动汽车实车诊断得到验证,诊断性能满足电动汽车诊断的要求。The system structure and working principle of an electric-drive mechanical transmission(EMT)for electric vehicle(EV)were introduced.According to the control strategy for the drive motor and the characteristics of the EMT shift actuator,the causes for failures were analyzed in the electrical part of the EMT system.Based on CAN network application layer UDS protocol,a fault diagnosis interface for the EMT was developed.The functional effectiveness of the fault diagnosis system for the EMT was verified by the real vehicle diagnosis.The diagnostic performance meets the requirements of the diagnostics for EVs.

关 键 词：电动汽车 EMT UDS协议 故障诊断 

分 类 号：U463.6[机械工程—车辆工程] U472.9[交通运输工程—载运工具运用工程]