汽车进气系统维修

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1、河南职业技术学院毕业设计（论文）题目浅谈发动机呼吸道疾病系（分院）汽车工程系学生姓名张维超学号07184273专业名称汽车检测与维修指导教师陈海燕2010年月日edgesshouldbecleaned,aftermakingsurethatnodefectshallbemarkedwithamarkerpentowritedownweldingneartheweld,includingthesloganofwelding,welders,etc.(16)weldingQianPreheatandtheweldingHouheattreatmentpipeweldingQ

2、ianPreheatandtheweldingHouheattreatmentprocessconditionsweldingQianPreheatandtheweldingHouheattreatmenttemperaturetableprojectmaterialweldingQianpreheattemperature(℃)weldingHouheattreatmentandtheinsulationtime(℃/H)wallthick(mm)temperature(℃)wallthick(mm)temperature(℃)20≥26100~200>36600~6

3、50/1-1.515CrMo≥10150~200>10670~700/1.2-2Preheatandtheheattreatmentprocessinthe,Innerandouterwalltemperatureshallbekeptuniform,inordertoavoidinternalstresses.Preheatingbeforeweldingandpostweldheattreatment,shallmeasureandrecordthetemperature,temperaturemeasurementlocationsandnumberofpoint

4、sarereasonable.Pronetowelddelayedcrackofsteel,postweldheattreatmentafterweldingshouldbecarriedoutpromptly,whennotconductingtimelypostweldheattreatment,shouldbeuniformlyheatedto200~300℃immediatelyafterweldingandinsulationandslowcooling,...26mmmorethan20steelpipeweldingpreheatingbeforeweld

5、ingshouldbecarriedout,36mmtheaboveheattreatmentafterweldingshouldbedone.Beforeweldingandheattreatmentusedoxyacetyleneflameheating,heattreatmentafterweldingusingspecialheattreatmentafterweldingequipment.Hardnessafterheattreatmentofweldsneededtesting.6.5.4sidesofthedissimilarsteelweldingwh

6、enwerenon-austeniticsteelorausteniticsteel,alloycontentaccordingtoloweronesideofthebasemetalorselectingweldingmaterialinbetween.Whenoneofthesidesofmaterialwhenausteniticsteels,shouldselectthe目录摘要……………………………………………………………………………………1一、概述………………………………………………………………………………..1二、充气系统的检修……………………………………

7、……………………………..1（一）、空气滤清器……………………………………………………………………1（二）、空气流量传感器………………………………………………………………11、空气流量传感器工作原理…………………………………………………..22、空气流量传感器结构………………………………………………………..23、空气流量传感器故障现象………………………………………………….24、空气流量传感器检修……………………………………………………….3（三）、节气门体与节气门位置传感器………………………………………………31、节气门体结构及检修…