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1、1,RBCD/QMM|Jan 15 2008|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.,Diesel Systems,无锡博世售后现场技术支持小组(RBCD-FCT),2,无锡博世售后现场技术支持小组(RBCD-FCT),RBCD/QMM|Jan 15 2008|Robert Bosch GmbH re
2、serves 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.,Diesel Systems,目前售后诊断、维修存在问题:,3,RBCD/QMM|Jan 15 2008|Robert Bosch GmbH reserves all rights even in the event of industrial property rights.We reserve a
3、ll rights of disposal such as copying and passing on to third parties.,Diesel Systems,一般恰当的诊断和处理过程:,1.根据故障现象、车辆反应,初步判断是什么方面的问题 机械,电或者零部件,但不能一开始就更换部件!除非确认,如蓄电池没电等等。2.察看发动机故障,读取故障代码 电控系统与老的机械系统有较大差别,电控方面的大部分故障,包括传感器、线束以及执行器的故障很多都会记录在ECU里面,通过诊断设备可以读取故障代码及其解释。3.根据故障代码及其解释,进行处理 一步步排查,具体问题具体分析,不确认之前,不要更换任
4、何零部件!,无锡博世售后现场技术支持小组(RBCD-FCT),4,RBCD/QMM|Jan 15 2008|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.,Diesel Systems,很多故障码表示某个局部有问题,而不能精确到某个部件或者传感器,如P1011-表示轨压偏差超上限,这表示的是压力不够,可能涉及
5、到低压部分(油箱没有、管路漏气、滤清堵塞等),也有可能是高压部分(高压零部件磨损等)引起,具体问题具体分析油路方面的故障码,请检查油箱、管路、燃油滤清器、高压泵、喷油器等电气方面,请检查线束、接插件、传感器本身等等,具体问题具体分析其它,参看错误描述,进行针对处理,无锡博世售后现场技术支持小组(RBCD-FCT),5,RBCD/QMM|Jan 15 2008|Robert Bosch GmbH reserves all rights even in the event of industrial property rights.We reserve all rights of disposal
6、 such as copying and passing on to third parties.,Diesel Systems,4.如果无法读取故障代码,请检查:A.诊断设备是否正常?包括:数据是否更新、设备硬件等 B.诊断口到ECU的通讯线束是否正常?C.ECU是否正常工作?包括:ECU供电、ECU本身等5.如果没有故障码 根据经验以及数据流进行分析判断,无锡博世售后现场技术支持小组(RBCD-FCT),6,RBCD/QMM|Jan 15 2008|Robert Bosch GmbH reserves all rights even in the event of industrial p
7、roperty rights.We reserve all rights of disposal such as copying and passing on to third parties.,Diesel Systems,电控柴油机系统故障诊断原则只有经过该系统专业知识培训的技师方能从事新型电控柴油系统的故障诊断应用合适的诊断设备、专用工具进行电控柴油系统的故障诊断故障诊断前需详细阅读发动机制造厂的操作指南和技术说明电控柴油机系统故障诊断多采用逆源诊断法,先使用诊断设备找出故障的可能原因,然后从外围设备到控制单元逐步寻找故障所在的部位,最后加以解决,无锡博世售后现场技术支持小组(RBCD-
8、FCT),7,RBCD/QMM|Jan 15 2008|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.,Diesel Systems,典型故障分析:,1.发动机不能起动/起动困难电瓶电压、启动电机保险丝,继电器,线索及接口防盗控制器、ECU问题等轨压无法建立(如无供油、油路堵塞、油路漏气、喷油器磨损回油量过大
9、等)同步不好(曲轴、相位传感器及线索,机械上如飞轮安装等)预热不好(冬天常见,包括冷却液传感器等)发动机机械部分,无锡博世售后现场技术支持小组(RBCD-FCT),8,RBCD/QMM|Jan 15 2008|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.,Diesel Systems,典型故障分析:,2.发
10、动机冒黑烟进气系统问题,如空滤堵塞涡轮增压器喷油器相关(喷油不精确)冷却液温度传感器发动机机械系统(如节气门等),无锡博世售后现场技术支持小组(RBCD-FCT),9,RBCD/QMM|Jan 15 2008|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.,Diesel Systems,典型故障分析:,3.发
11、动机冒白烟冷却液温度传感器预热系统油里含水过多发动机机械系统(如节气门漏气等),无锡博世售后现场技术支持小组(RBCD-FCT),10,RBCD/QMM|Jan 15 2008|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.,Diesel Systems,典型故障分析:,4.发动机冒蓝烟机油过多,来自涡轮增压
12、器润滑、曲轴通风管、节气门润滑、活塞润滑等,无锡博世售后现场技术支持小组(RBCD-FCT),11,RBCD/QMM|Jan 15 2008|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.,Diesel Systems,典型故障分析:,5.发动机动力不足空滤或者进气管路堵塞、管路漏气(增压器后)涡轮增压器问题
13、废气再循环问题油门踏板输入信号不对冷却液温度传感器、进气流量传感器等燃油问题轨压不够(高压泵等),油路堵塞,油路漏气喷油器积炭等控制功能方面,过热保护、降级(如燃油含水位过高)等发动机机械问题,无锡博世售后现场技术支持小组(RBCD-FCT),12,RBCD/QMM|Jan 15 2008|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
14、third parties.,Diesel Systems,举例:,1.发动机不能起动时间:2008年8月 地点:北京福田公司车辆:风景 发动机:4JB1 里程数:30KM故障码:P0251(油量计量阀开路),P0404(没有EGR信号),P0193(轨压传感器电压超上限)等故障描述:车辆下线后就不能起动,开始福田工程师更换ECU能起动,但后来又不能起动,工程师对线索及传感器检查,确认正常。FCT排查:根据错误代码逐个排除,测量传感器发现都正常,检查线索时,发现对传感器供电不正常,逐步确认下去,发现ECU供电不正常,最后检查ECU线索,发现主继电器有问题,更换主继电器问题解决。,无锡博世售后现
15、场技术支持小组(RBCD-FCT),13,RBCD/QMM|Jan 15 2008|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.,Diesel Systems,举例:,2.发动机不能起动、黑烟、抖动时间:2008年4月 地点:马鞍山车辆:皮卡 发动机:4JB1 里程数:15,000Km故障码:P1011-轨压偏差超上极限(轨压偏小)故障描述:车辆起动不了,但是用别的车一拖就能拖着,能起动时,冒黑烟,发动机振动较大FCT排查:根据错误代码分析,一般此故障由于轨压偏小造成,排查如下:a.检查油箱里燃油,油箱里粗滤状况;b.检查低压回路,确保管路密封,无任何弯折;c.检查燃油滤清器;d.检查喷油器回油量;当时通过这几步排查,a,b,c都正常,当测喷油器回油量时,135ml/30s,根据经验值,此值偏大,更换喷油器,故障排除。,无锡博世售后现场技术支持小组(RBCD-FCT),