博世天然气系统典型故障分析_CV.pptVIP

* * * * * * * * Internal | RBCD/QMM3-FCT | 03/20/2014 | ? Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. CNG Systems 博世天然气系统诊断方法及典型故障 RBCD/QMM3-Zhou * Internal | RBCD/QMM3-FCT | 03/20/2014 | ? Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. 天然气系统诊断方法以及典型故障 CNG Systems 1 天然气系统诊断现状 2 天然气系统恰当的诊断方法 3 天然气系统常见故障代码以及可能原因 4 天然气系统典型故障案例分析 * Internal | RBCD/QMM3-FCT | 03/20/2014 | ? Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. CNG Systems * 天然气系统诊断现状 缺乏正确的、合理的诊断思想、处理方法 缺乏天然气系统知识和经验，缺乏诊断设备、条件 缺少对零部件正确使用的知识,包括拆装、包装保护等 A.误诊断、误更换 B.问题解决不彻底 C.难以积累经验 D.维修成本上升 售后天然气系统诊断的误区与问题 Internal | RBCD/QMM3-FCT | 03/20/2014 | ? Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. CNG Systems * 初步定位故障方向、故障点根据车辆故障现象及反应，初步判断是什么方面的问题（机械、电气、零部件），不要盲目更换部件 初步排查 读取故障码 根据故障码排查 无故障码排查 恰当的诊断步骤 Internal | RBCD/QMM3-FCT | 03/20/2014 | ? Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. CNG Systems * 恰当的诊断步骤 初步排查 读取故障码 根据故障码排查 无故障码排查 使用诊断设备读取故障代码 与电控柴油车辆类似，车辆故障会以故障代码形式存储于ECU包括燃气 系统、空气系统、传感器、线束、执行器 故障代码包括历史和当前，历史故障码不影响车辆性能 读取时应遵循：读-记-清-读-记（分析） Internal | RBCD/QMM3-FCT | 03/20/2014 | ? Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. CNG Systems 恰当的诊断步骤 初步排查 读取故障码 根据故障码排查 无故障码排查 * 根据故障代码及其解释，逐步排查故障一步步排查，做到具体问题具体分析，不确认故障点之前，不要更换任何零部件！ 注意点：大部分故障码只表示某个局部有问题，而不能精确到某个部件或者某个传感器