汽车英语 汽车性能参数及检测设备.ppt

项目八汽车性能参数及检测设备,briefintroduction,wordlist,adjustableadj.可调整的ambientadj.周围的，环绕的apparatusn.器械，设备，仪器compactadj.紧凑的，紧密的，简洁的coupen.供两人坐的小汽车cradlevt.将.放在摇篮内，支持，支撑deflectv.(使)偏转deterrentn.威慑dynamicadj.动力的，动力学的，动态的estimatev.估计，估价，评估,componentscognition,componentscognition,componentscognition,componentscognition,componentscognition,componentscognition,componentscognition,componentscognition,componentscognition,componentscognition,componentscognition,propernames,4-wheelalignmentgauge四轮定位仪automobilebraketester汽车制动性能测试仪brakingperformance制动性能chassisdynamometer底盘测功机dieselsmokemeter柴油机烟度计drive-wheel驱动轮engineanalyzer发动机分析仪enginetestbed发动机试验台fifthwheelsensor五轮传感器,kingpininclination主销内倾角leakdetector泄漏检查器performanceparameter性能参数performancetester性能测试仪powerabsorptionunit动力吸收单元side-sliptester测滑测试仪singleboardcomputer单片机speedometertester车速表测试仪ultrasonicmicrophone超声波扩音器ultrasonicprobe超声波探测器,propernames,makesuseof使用，利用rubberbushing橡胶套管engineknock发动机爆震metaldiaphragm金属膜片fuelconsumptionsensor燃油消耗传感器headlighttester前照灯检测仪infraredabsorptionanalyzer吸收式红外分析仪kingpincaster主销后倾角ultrasonictransmitter超声波讯号发送器wheelcamber轮外倾角wheeldynamicbalancer轮动态平衡机,propernames,enginenoisediagnosistheabilitytodiagnoseenginenoiseswithafairdegreeofaccuracymaybeavitalpartofthetune-upspecialistsjob.forinstance,itmaybenecessaryforatechniciantorecognizeandlocatethecauseofnoisesthatmaydevelopduetonormalenginewearandtearoverlongperiodsofuseormayappearbecauseoffailureofoneormoreengineparts.,textlearning-example,thepartsthatproducesomecharacteristicnoisesareloosepistons,excessivelywornringsorringlands,loosepistonpins,wornconnecting-rodbearings,wornmainbearings,loosevibrationdamperorflywheel,orwornorloosevalve-traincomponents.whenproperlyinterpreted,thesenoisesareadefiniteaidinanydiagnosisofenginemechanicaldifficulties.buttherearemanysourcesandvarietiesofenginenoises;carefulinterpretationofthesesoundsisnecessaryforseveralreasons.,first,acarefuldiagnosisofanenginenoisecanoftenpreventtheexpenseoftearingdownanengine.inthisregard,atechnicianshouldalwaysmakeanoiseanalysisbeforeenginerepairbeginssothatonlytheneededandcorrectoperationsaremadewithnoextraworkorchargestothecustomer.second,acarefulinterpretationofabnormalenginesoundscanpreventtheenginefromrequiringextensiveandcostlyrepairworkaftercontinuedusagehasruinedit.,stethoscopeallmovingmechanicalenginepartscreatesomeformofsoundwavesofvariouspitches,frequencies,qualities,andintensities.mostpeoplecanhearmanyofthesesoundwaveswithouttheassistanceofalisteningdevice.ontheotherhand,somesoundsareimpossibletohearunlessmagnifies;evenifsomesoundsareaudible,theyarefrequentlydifficulttolocalizeandlocate.consequently,mosttechniciansutilizesomeformofsoundingrodorstethoscopewhendiagnosingenginesounds.,astethoscope,orsoundscope,aidsinlocatingthesourceofengineknocksandnoisesbymagnifyingtheirsoundwaves.thisinstrumentmakesuseofametalprod,about8incheslongand1/8inchindiameter,thatpassesthrougharubberbushingandterminatesagainstametaldiaphragmheldinaplastichousing.furthermore,twoeartubescarrythesoundfromthisdiaphragmchambertothelistenersears.thevalueofthesound-detectingandamplifyingstethoscopeis,ofcourse,tohelpthetechniciandistinguishthedifferencebetweennormalandabnormalsoundsandtofindthelocationandcauseofthelatter.,soundtracingwiththestethoscopethebestwaytotraceanytypeofnoiseistofollowasystematicprocedure.first,forexample,alwaysuseastethoscopeorothersoundingdevicetoamplifythesound.second,withthelisteningdevice,attempttolocalizeandidentifythenoise.youcantracebothunfamiliarandfamiliarsoundstotheportionoftheenginewheretheyoriginatebyfollowingthesoundwiththeprodofthestethoscopeuntilthenoisereachesitsmaximumintensity.afteryoulocatethisspot,aknowledgeofengineconstructionandoperationwillbeyourbestguideastothemostlikelycauseofthesound.,notes,1.thechassisdynamometermeasuresthemechanicalpowerofthevehicleatthedrive-wheelsandprovidestheoperatorwithareadoutinunitsofroadspeedandpower.翻译：底盘测功机能测量车辆驱动轮上的机械功率，并能给操作员显示车辆的道路行车速度和功率具体读数。2.therearesevensensors-ignition,powersupply,voltage,oilpressure,cylinderpressure,vibrationandfuelinjectionsensors.翻译：发动机分析仪上有七种传感器，分别是点火传感器、电源供给传感器、电压传感器、油压传感器、气缸压力传感器、振动传感器和燃油喷射传感器。,translationofdifficultsentence,3.thevalueofthesound-detectingandamplifyingstethoscopeis,ofcourse,tohelpthetechniciandistinguishthedifferencebetweennormalandabnormalsoundsandtofindthelocationandcauseofthelatter.翻译：起探测声音和放大声音作用的听诊器，其声音强度有助于技师辨别发动机内的正常声音和异常声音，并使他发现发出异常声音的部位和原因。4.youcantracebothunfamiliarandfamiliarsoundstotheportionoftheenginewheretheyoriginatebyfollowingthesoundwiththeprodofthestethoscopeuntilthenoisereachesitsmaximumintensity.翻译：用听诊器探针探测噪音，直到所探测到的噪音强度最大，从而发现噪音部位，通过这种方法，你就可以跟踪那些熟悉或不熟悉的噪音找到发动机上噪音源。,practicalreadingnotes,1.thepartsthatproducesomecharacteristicnoisesareloosepistons,excessivelywornringsorringlands,loosepistonpins,wornconnecting-rodbearings,wornmainbearings,loosevibrationdamperorflywheel,orwornorloosevalve-traincomponents.翻译：产生带某种特征噪音的部件有松动的活塞、过度磨损的活塞环或环岸、松动的活塞销、磨损的连杆轴承、磨损的主轴承、松动的减振器或飞轮以及磨损或松动的配气机构的元件。2.second,acarefulinterpretationofabnormalenginesoundscanpreventtheenginefromrequiringextensiveandcostlyrepairworkaftercontinuedusagehasruinedit.翻译：再则，对发动机异常噪音的正确解读能避免发动机在已经损坏的情况下继续使用，否则会导致后续的大量维修工作和昂贵的维修费用。,3.thesidesliptestermeasuresthedistanceinmetersoverwhichawheelofanaxleisdraggedsideways,whentheotherwheelofthataxlerunsstraightforonekilometer.翻译：侧滑试验台以米为单位来测量，当某一轴上的一个车轮笔直向前行驶一千米时，该车轴上的另一车轮被向一旁牵引的距离（即侧滑量）。4.adieselsmokemeterusesmicro-wavestodetectthedensityofblacksmokecontainedintheexhaustgasdischargedfromthedieselenginethroughanexhaustpipe.翻译：柴油机烟度计用微波来检测柴油机排气管中所排出的废气中包含的黑烟的浓度。5.theleakdetectorisusedforlocatingleaksinanypressureandvacuumsystem,andisalsousedtoexaminethedischargetroublesinelectricapparatus.翻译：泄露检查器用于查找所有压力和真空系统中的泄露点，也用于查找电气设备中的漏电故障。,exercises,1.choosethebestanswerfromthefollowingchoicesaccordingtothetext1)dieselsmokemeterisusedforthemeasurementofsmokeemittedfromvehiclewithengine.a.gasolineb.dieselc.liquefiedpetroleumgasd.naturalgas2)iftheenginedoesnotburnupallthefuelduringthecombustionprocess,rawgasolinegoesoutthetailpipeandregistersasonthemeter.a.cob.co2c.noxd.hc3)thetypicalchassisdynamometerconsistsofrollers,aremotecontrolpendant,andreadoutinstruments.a.twob.threec.fourd.five4)theweightsofthesizeindicatedareplacedonthewheelrimintheproperposition(fromeachotheronoppositewheelrims).a.90b.120c.180d.270,2.translatethefollowingintochinese1)microcomputer2)technician3)speedometer4)kingpininclination5)wheelcamber6)opacimeter7)fuelconsumption8)leakdetector9)powerabsorptionunit3.translatethefollowingintoenglish1)柴油机烟度计2)底盘测功机3)发动机试验台4)