桑塔纳3000发动机电控系统故障的诊断与检修

编号淮安信息职业技术学院毕业论文题目桑塔纳3000发动机电控系统故障的诊断与检修学生姓名邓仁杰学号81111210院系汽车工程系专业汽车电子技术班级811112指导教师施海凤讲师顾问教师二〇一三年十一月摘要I摘要随着电控燃油喷射技术的发展和维修认识水平的不断提高，现代轿车中在对装有电控燃油喷射发动机的汽车进行维修时，使用故障诊断仪对发动机电控单元(ECU)进行检测，并根据ECU存储的故障代码进行检修，大多数能判明故障可能发生的原因和部位，会给维修人员的工作带来很大的方便。然而，在对汽车维修时，若仅仅靠故障代码寻找故障，往往会出现判断上的失误。实际上，故障代码仅仅是ECU认可的一个是或否的界定结论，不一定是汽车真正的故障部位，因此，在对汽车进行维修时应综合分析判断，结合汽车故障的现象来寻找故障部位。本篇文章首先介绍了桑塔纳3000发动机电控系统的各个系统组成以及工作原理，接着介绍了桑塔纳3000发动机电控系统的故障现象和故障产生的机理,然后讲解了各个故障的诊断方法以及诊断过程。最后通过一个故障案例来具体的讲述故障诊断的流程。关键词：电控发动机;故障诊断;桑塔纳3000AbstractIIAbstractWiththedevelopmentofelectroniccontrolfuelinjectiontechnologyandrepairtheunderstandinglevelofthecontinuousimprovement,withtheelectroniccontrolfuelinjectionengineautomobilerepairinthemoderncar,unitfaultdiagnosisinstrumentforengineelectroniccontrol(ECU)weredetected,andmaintenanceaccordingtothefaultcodeECUstorage,mostcancauseandthesiteofmarshalingfailuremayoccurof,willbringgreatconveniencetotherepairwork.However,intheautomotiverepair,ifonlybythefaultcodetofindfault,oftencanappearmistakeinjudgment.Infact,thefaultcodeisonlyaECUaccreditedyesornodefinitionofconclusion,notnecessarilythefaultposition,thecarreallyso,intherepairofthecarshouldbecomprehensiveanalysis,combinedwiththeautomobilefaultphenomenontofindthefaultposition.ThisarticlefirstintroducesSantana3000enginecontrolsystemcompositionandworkingprincipleofthesystem,andthenintroducesthemechanismofSantana3000enginecontrolsystemfaultandfault.Thenexplainthediagnosismethodofeachfaultanddiagnosisprocess.Finally,afaultcasetofaultdiagnosisaboutthespecificprocess.Keywords:Electroniccontrolledengine;faultdiagnosis;Santana3000目录III目录摘要.............................................................................................................................IABSTRACT..................................................................................................................II第一章桑塔纳3000的绪论...........................................................................................11.1简介.......................................................................................................................1第二章桑塔纳3000汽车发动机电控系统的组成及工作原理..................................32.1汽油机电控燃油喷射系统的组成和工作原理...................................................32.2电控点火系统的组成与工作原理.......................................................................42.3电控进、排气系统的组成和作用.......................................................................42.4电控辅助控制系统...............................................................................................6第三章桑塔纳3000发动机电控系统的故障及产生机理..........................................83.1发动机不能发动...................................................................................................83.2发动机怠速不良故障...........................................................................................83.3混合气稀故障.......................................................................................................93.4加速不良故障.......................................................................................................93.5发动机异响故障...................................................................................................9第四章桑塔纳3000发动机电控系统的故障诊断.....................................................134.1发动机不能发动诊断.........................................................................................134.2发动机怠速不良故障诊断.................................................................................154.3混合气稀故障诊断.............................................................................................184.4加速不良故障诊断.............................................................................................194.5发动机异响的故障诊断.....................................................................................20第五章检测与维修时的注意事项...............................................................................225.1电控发动机维修要点.........................................................................................225.2电控燃油系统检查要点.....................................................................................22第六章故障案例分析...................................................................................................246.1故障现象.............................................................................................................246.2故障诊断与排除.................................................................................................246.3故障维修小结.....................................................................................................25第七章总结与展望.......................................................................................................267.1总结.....................................................................................................................267.2展望.....................................................................................................................26致谢...............................................................................................................................28参考文献......................................................