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Study on Fault Self-diagnosis System of Automatic Mechanical Transmission

Author: JieHongLin
Tutor: LinMingXingï¼›ZhangChengRui
School: Shandong University
Course: Mechanical Manufacturing and Automation
Keywords: AMT Fault Diagnosis Diagnostic ISO 15765
CLC: TH165.3
Type: Master's thesis
Year: 2011
Downloads: 88
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Abstract


The many advantages of both manual transmission and automatic transmission , electronically controlled automatic mechanical transmission (AMT) , is an important direction of development of the automatic transmission technology . As important automotive transmission parts , transmission failure , a sharp decline will make the performance of the car , or even cause a serious accident . AMT system fault diagnosis research is an important part of the development of AMT products , can improve the AMT system security and reliability , and to ensure their normal operation , the AMT product of the improvement and development of the entire system and the promotion of independent research and development has important significance . In this paper, real-time , accurate fault diagnosis and treatment of the AMT system completed the design of the AMT fault self-diagnostic system for the study of the target , using the method of combining online diagnosis and offline diagnosis . Online diagnostics completed by the the AMT transmission control unit (TCU) , offline diagnosis through diagnostic completed the TCU and diagnostic by the ISO 15765 protocol based on CAN bus communication . Firstly AMT technology and fault diagnosis technology research status reviewed analysis of the basic structure and working principle of electric AMT system , summarizes the fault type and cause of the malfunction of the AMT system , analysis of failure modes and failure characteristics logical relationship between the analysis of the advantages of using the ISO15765 protocol based on CAN bus , to determine the overall design of the system . Then completed with fault monitoring hardware fault tolerance TCU 's hardware design , and to develop a fault diagnosis and fault handling rules , combined with signal analysis , redundant relations and driveline local model - based diagnostic methods designed TCU fault self- diagnosis software module. AMT fault diagnostic software and hardware design , complete WinCE operating system customization . Finally, TCU and diagnostic developed fault diagnostic interface based on the ISO 15765 protocol , and the development of a diagnostic test procedures in diagnostic test research of the fault diagnosis system in the experimental stage of AMT . The tests showed that the AMT fault diagnosis system developed diagnostic accuracy , stable performance , to meet the needs of practical application , has a certain practicality .

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CLC: > Industrial Technology > Machinery and Instrument Industry > Machinery Manufacturing Technology > Flexible manufacturing systems and flexible manufacturing cell > Fault diagnosis and maintenance
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