1 Unit 3ppt课件

Unit3EngineCoolingandLubricationSystem 1 EngineCoolingSystemThecoolingsystemisusedtokeeptheengineatthemostefficientoperatingtemperature Thecoolingsystemiscomposedofthewaterjacket insidethecylinderblockandcylinderhead radiator waterpump thermostat fan hosesandothercomponents Fig1 3 1showsthepartsofacoolingsystem efficient效率高的waterjacket水套radiator散热器 水箱waterpump水泵thermostat节温器hose软管 CoolingSystem 冷却系统 Fig 1 3 11 radiator 散热器 2 securingclip 固定夹 3 securingrubber 固定橡胶 4 uppercoolanthose 上部冷却液软管 5 rubberwasher 橡胶垫 6 radiatorfan 冷却风扇 7 fanring 风扇罩壳 8 lockingbolt 紧固螺栓 9 nut 螺母 10 2pinconnector 双头插式插头 11 lowercoolanthose 下部冷却液软管 12 Oring O型圈 13 connector 连接插头 14 radiatorfanthermoswitch 散热风扇的热敏开关 15 seal 密封圈 16 drainscrew 排水螺栓 1 RadiatorandFanTheradiatorperformsthefunctionofcoolingthecoolantwhichhaspassedthroughthewaterjacketandbecomehot anditismountedinthefrontofthevehicle Afanismountedbehindtheradiatortoassisttheflowofairthroughtheradiator Thefanoperateswhentheenginecoolanttemperaturebecomeshighinordertopreventitfrombecomingtoohigh 2 RadiatorCapAreliefvalve pressurizationvalve andavacuumvalve negativepressurevalve arebuiltintotheradiatorcap Itisusedtomaintainthecorrectandconstantpressureonthecoolingsystem 3 WaterjacketThewaterjacketistheopenspaceswithinthecylinderblockandcylinderheadthroughwhichcoolantpasses perform执行assist帮助reliefvalve泄压阀pressurization维持大气压水平vacuumvalve真空阀negativepressure负压 4 WaterPumpThewaterpumpisusedtocirculatethecoolantthroughthecoolingsystem Itismountedonthefrontofthecylinderblockanddrivenbyatimingbelt 5 ThermostatThethermostatisoneofthemostimportantpartsofthecoolingsystem andusedtokeeptheenginecoolantatthemostefficienttemperature Ifthecoolantremainscold itwillbeclosed Inthiscase alargeamountofcoolantgoestotheby passtubewithoutbeingcooled Theremainingcoolantpassesthroughtheradiatortobecooled Ifthecoolanttemperaturerisestotheopeningpoint thethermostatopensslightly Asthetemperatureincreasesfurther thethermostatopensmore Whentheengineisunderfullload thethermostatwillbefullyopen Themaximumamountofcoolantwillbesenttotheradiatorforcooling andasmallamountwillcontinuetoflowthroughtheby passtube timingbelt正时皮带by passtube旁通管openingpoint开启点slightly轻微地load负荷 2 EngineLubricationSystemLubricationsystemhasbeenadoptedtosupplyoiltothemovingpartsofthisengine Thelubricationsystemconsistsofanoilpan oilpump oilfilter oilcoolerandpressurereliefvalve Fig1 3 2showsthepartsofalubricatingsystem 1 OilpanTheoilpanislocatedonthebottomoftheengineandholdstheexcessoilduringoperationandnorunningconditions Apluginthebottomoftheoilpanisusedtodraintheoil 2 OilpumpTheoilpumpislocatedinthecrankcaseareasothatoilcanbedrawnfromtheoilpanandsentintotheengine 3 OildrainplugOilpressurereliefvalveisusedtokeepthepressurewithintheoilsystemataconstantmaximumvalue lubrication润滑adopt采用supply供给oilpan油底盘drain排放draw抽吸 LubricatingSystem 润滑系统 Fig 1 3 21 gasket 密封垫片 2 cap 加油口盖 3 dipstick 机油标尺 4 guide 机油标尺导管口 5 oilfilterbracket 机油滤清器支架 6 oilpressureswitch 机油压力开关 7 O ring O形圈 8 oilcooler 机油冷却器 9 oilfilter 机油滤清器 10 cap 密封盖 11 drivegear 驱动齿轮 12 gears 齿轮 13 oilpumpcoverwithpressurereliefvalve 带泄压阀的机油泵盖 14 baffleplate 挡油板 15 oildrainplug 放油螺栓 16 seal 密封圈 17 oilpan 机油盘 18 gasket 机油盘垫片 19 suctionline 吸油管 20 Oring O形圈 4 OilfilterOilFilterisadoptedtocleanthedirtparticlesoutofthelubricatingsystem Astheoilanddirtflowthefilterunit contaminantsaretrappedinsidethefilterunit 5 OilcoolersOiltemperatureforanengineshouldbeincertainrangeofdegrees Undernormalconditions oiliscooledbytherightamountofoilintheoilpan Whenexcesstemperaturesoccurs suchassomeheavy dutygasolineenginesandmanydieselengines oilcoolersareusedtokeeptheoilcool 6 OilpressuresensorsandgaugesOilpressuresensorsareusedtosensetheoilpressureinthelubricatingsystem Oilpressureisusuallysenseddirectlyfromthemainoilgallery Thevalueissenttothedashboardonthevehicleandtheoperatorcanreadit Thesystemscommonlyusedareapressuregaugeandanoilindicatorlight Thepressuregaugereadstheoilpressurewithinthesystem Theoilindicatorlightgoesonwhenoilpressureislowerthanacertainvalue 7 Markingonoildipstick Fig 1 3 3 particle粒子contaminant污染物trap收集heavy duty大功率gasoline汽油diesel柴油sense感觉gallery通道dashboard 汽车等的 仪表板gauge仪表dipstick油尺 Dipstick 机油尺 Fig 1 3 31 Max mark2 Min marka Areaabovehatchedfielduptomax mark Donottop upwithengineoil b Oillevelwithinhatchedfield canbetopped upwithengineoilc Areafrommin markuptohatchedfield fillwithmax 0 5liter ofengineoil TranslationSkill 3 词义的引申 英汉两种语言在表达上有很大差别 翻译时 有些词或词组不能直接搬用词典中的释义 若生搬硬套 会使译文生硬晦涩 难以看懂 甚至造成误解 所以 要在弄清原文内涵的基础上 根据上下文的逻辑关系和汉语的搭配习惯 对词义加以引申 若遇到有关专业方面的内容 必须选用专业方面的术语 引申后的词义虽然同词典中的释义稍有不同 但能更确切地表达原文意义 1 However colorscangivemoreforcetotheformoftheproduct 欠佳译法 然而 色彩能给与产品更多的力量 引申译法 然而 色彩能使产品外形增添美感 2 Neverheatrefrigerantcontainerorexposeittonakedflame 欠佳译法 永远不要加热制冷剂贮液罐或将它暴露在裸露的火焰中 引申译法 绝对不要直接加热制冷剂贮液罐或者与明火接触 3 Whenexcesstemperaturesoccurs suchassomeheavy dutygasolineenginesandmanydieselengines oilcoolersareusedtokeeptheoilcool 欠佳译法 当过剩的温度发生时 如某些重责任的汽油机和许多柴油机 使用机油冷却器使机油冷却 引申译法 当温度过高时 如某些大功率汽油机和许多柴油机上 使用机油冷却器冷却机油 4 Duringthefirstpartofhislife Wattstudiedweatherandstorm 欠佳译法 在他生命的第一部分 瓦特研究过天气和风暴 引申译法 瓦特年轻时研究过天气和风暴 Exercises 练习 1 TranslatethefollowingintoChinese 1 oilcooler 2 gasolineengine 3 fanring 4 lockingbolt 5 drivegear 6 suctionline 7 oilfilterbracket 8 2 pinconnector 9 radiatorfanthermoswitch 10 dieselengine 1 机油冷却器 2 汽油机 3 风扇罩壳 4 紧固螺栓 5 主动齿轮 6 进油管 7 机油滤清器支架 8 双头插式插头 9 散热器风扇热敏开关 10 柴油机 2 TranslatethefollowingintoEnglish 1 水套 2 水泵 3 散热器盖 4 真空阀 5 机油泵 6 机油滤清器 1 Waterjacket 2 Waterpump 3 Radiatorcap 4 Vacuumvalve 5 Oilpump 6 Oilfilter 3 TranslatethefollowingsentencesintoEnglish 1 Whentheengineiswarm thecoolingsystemisoverpressure Itisnecessarytoreleasepressurebeforestartingrepairwork 2 Wheninstallingcoolanthoses routestress freesothattheydonotcomeintocontactwi