基于MDI汽车故障诊断系统研究与开发

The Research and Development of Vehicle Fault Diagnostic System Based on MDI

针对传统PC式汽车故障诊断系统的不足,本文提出了一种标准化的PC式汽车故障诊断系统,由标准诊断接口设备和诊断应用软件组成,硬件选用满足SAE J2534标准的MDI诊断工具,研究了MDI通信机制和SAE J2534标准内容,优化了系统数据读取速率,采用架构层次化、功能模块化的思路,开发了诊断应用软件。经实车测试及分析,系统可实现对整车电控系统的故障诊断、维修帮助、实时监控和在线刷新,具有良好的通用性和扩展性,对应用标准设备开发具有借鉴意义,为车辆诊断维修提供了有利工具。

For the deficiencies of traditional PC-based vehicle fault diagnostic system, this paper proposes a kind of standardized PC-based vehicle fault diagnostic system which by the standardized diagnostic interface device and diagnostic application software, selects the MDI diagnostic device which conformed to SAE J2534 standard, studies the communication mechanism of MDI and SAE J2534 standard content, optimizes the data read rate, develops the diagnostic application software using the ideas of hierarchical architecture and function modularization. Through vehicle testing and analysis, this system allows the fault diagnosis, maintenance help, real-time monitoring and online refresh for vehicle electronic control system, has a good versatility and scalability, has a reference for developing standardized diagnostic device and provides the favorable tools for Vehicle Diagnosis and Maintenance.