机械式自动变速器故障诊断自动化测试方法研究  

Research on Automatic Testing Method of AMT Fault Diagnosis

作　　者：熊自远 潘旭 李苏琪 吕琼 张鑫 刘双平 Xiong Ziyuan;Pan Xu;Li Suqi;Lü Qiong;Zhang Xin;Liu Shuangping(Dongfeng Commercial Vehicle Tech-Center,Wuhan 430056)

机构地区：[1]东风商用车技术中心,武汉430056

出　　处：《汽车工程师》2024年第12期41-45,共5页Automotive Engineer

摘　　要：为实现机械式自动变速器(AMT)故障诊断自动化测试和有效性验证,基于硬件在环(HiL)测试系统和自动化测试软件,针对机械式自动变速器前副箱低挡换挡卡滞故障搭建自动化测试序列,测试该问题的故障诊断应对情况,结果表明,故障诊断应对符合预期,验证了测试序列和故障诊断的准确性。基于该测试序列搭建了高速行驶工况下正常换挡、无故障应对条件下换挡和故障应对条件下前副箱低挡换挡工况。测试结果表明,发生前副箱低挡换挡卡滞故障时,变速器控制单元(TCU)可及时识别并进行应对,应对符合预期,同时可保证车辆继续正常行驶,验证了故障诊断应对的有效性。In order to realize automatic test and effectiveness verification of Automatic Mechanical Transmission(AMT),an automatic testing sequence is constructed based on the Hardware-in-the-Loop(HiL)testing system and automated testing software for the low gear shifting stuck fault of AMT front auxiliary gearbox.The fault diagnosis response is tested,and the test results show that the fault diagnosis response meets expectations,verifying the accuracy of the test sequence and fault diagnosis.Based on the test sequence,the normal gear shifting at high speed,gear shifting without fault and the low gear shifting of the front auxiliary gearbox under fault response are established.Test results show that the Transmission Control Unit(TCU)recognizes and responds in time when the front auxiliary gearbox low gear shift stuck fault occurs.The response is in line with expectations,and it also can keep the vehicle running normally under the fault diagnosis response,which verifies the effectiveness of the fault diagnosis response.

关 键 词：机械式自动变速器 变速器控制器 故障诊断测试 故障诊断性能 硬件在环 换挡 卡滞 

分 类 号：U461[机械工程—车辆工程]