教学材料《汽车专业英语》-1.7 cooling System

1.7CoolingSystemTitle孟思聪

Revision1FunctionsofLubricatingSystem.2FunctionsofLubricationOil.NewLessonRevision2Recognizethefollowingpictures.Revision3Recognizethefollowingpictures.油底壳集滤器（oilstrainer）机油泵限压阀油压开关机油滤清器Revision壳体从动齿轮月牙隔板外齿轮内齿轮内转子外转子壳体主动齿轮GearOilPumpCrescentOilPumpRotorOilPumpRevisionDuocentricOilPump内转子外转子油压控制阀RevisionOilFilter止回阀螺纹密封圈外壳滤芯旁通阀RevisionOilCooler连接软管出油阀进油阀空气流机油冷却器Lead-inWehaveknownthefivesystemsoftheengine.FivesystemsLubricatingsystemCoolingsystemIgnitionsystemStartingsystemFuelsupplysystemLearningobjectives1.2.Relatedwords,phrasesandabbrs.3.Workingprinciplesofeachsection.4.Englishexpressionsofcomponents.Recognizethepicturesaboutthesystem.NewLessonNewLessonDiscussionReadthefirstparagraphofpart1.7quickly,discussandfindoutthefunctionofcoolingsystem.NewLessonTheFunctionofCoolingSystemIdeally,anautomobilecoolingsystemkeepstheenginerunningatanoptimumtemperaturewhatevertheoperatingconditionsare.Thecoolingsystemcanremoveheatfromallthemovingpartssothattheycanworksuitablywithoutmeltingandoverheating.Automotivecoolingsystemmakesuseofcoolantandfantomaintainandregulatethetemperatureofotherpartsofanengine.optimumtemperatureremoveheatmaintainandregulateNewLesson节温器水泵旁通软管散热器风扇风扇及水泵皮带水套14NewLessonCoolingMethodsLiquid-coolingSystemAir-coolingSystem16practice:translation1、没有适当的运转温度，发动机就不能正常工作。2、如果发动机温度太高，活塞就会膨胀，也就不能在汽缸里运动。3、为使发动机温度保持平衡，就必须要有冷却系统。4、水冷却系是以水作为冷却介质用以在发动机中循环。5、热量由冷却水带至散热器散发。171/3ofheat1/3ofheat1/3ofheatthermalenergypowergooutcoolingsystemNewLessonLiquid-coolingSystemLiquidCoolingAgentcoolantantifreezeNewLessonRadiator热的冷却液上水箱热风冷风冷却液核心下水箱20waterpumphousingimpellerinletpipeoverflowpipeaspring-loadedseal21radiatortoptankradiatorcapradiatorbottomtankradiatorcoredrainplug22ribboncellularfinandtubetypeNewLessonWaterPump24thermostatwaxwax-elementthermostatbypassvalve25pistonrodvalveseatmainvalvebypassvalvewaxswingvalve26talkaboutthethermostatsituationsimplecirculationfullcirculationNewLessonThermostatNewLessonFan风扇罩散热器风扇叶片29

theenginerunstoohot:1.pre-ignition2.viscosityoftheoil3.varnishandcarbondeposits4.poorperformanceandprematurewear5.thebehaviorofthemetal30theenginerunstoocold:1.vaporize,reducelubrication,dilutetheengineoil2.alossofperformance3.HCemission4.prematureenginewearNewLessonWorkingProcesscombinationcirculationNewLessonradiatorcapradiatortoptankradiationfinwaterpumpfindrainplug/offletvalvethermostattemperaturegaugesensorwaterjacketSummary1.2.Relatedwords,ph