基于IS015765的电动汽车诊断系统设计

Design of Electric Vehicle Diagnosis System Based on ISO15765

摘要:

为了更加便捷地对电动汽车进行程序更新和故障诊断,开发了符合ISO15765的底层刷写协议栈；参考BOSCH ECU在线刷写流程拟定XC2000刷写流程,包括初始化、密钥认证、Flash分区擦除、Flash分区写入等过程；开发XC2000 Flash驱动,实现Flash按地址进行块擦除和写入,开发Bootloader,实现硬件资源初始化以及ISO15765协议栈的装载；开发了符合ISO15765的底层故障诊断协议栈,实现故障码读取、故障码清除、数据流读取、执行器测试等故障诊断功能；开发了电动汽车诊断上位机系统,并通过硬件在环仿真测试平台进行测试；测试结果表明,设计的电动汽车诊断系统利用CAN总线能够实现ECU在线刷写及故障诊断功能。

Abstract:

In order to carry out the program update and fault diagnosis of electric vehicle more conveniently, an underlying programming protocol stack in line with ISO15765 standards is developed. Referring to the BOSCH ECU online programming progress, the XC2000 programming process is proposed,which include initialization, key authentication, Flash partion erasing, Flash partion writing, etc. The XC2000 Flash driver has been developed to implement Flash block erasing and writing by address, and Bootloader has been developed to implement hardware resource initialization and loading IS015765 protocol stack. An underlying fault diagnosis protocol stack in line with ISO15765 standards is developed to implement reading DTC, clearing DTC, reading data flow, actuator test etc. An electric vehicle diagnosis host computer system is developed, which is tested by the Hardware-in-the-loop Test Bench. And the results show that the electric vehicle diagnosis system based on CAN bus have both ECU online programming and fault diagnosis functions.