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Task4CoolingSystemServiceManual冷却系统维修手册一、学习目标•1、掌握冷却系统英文专业术语•2、熟悉汽车专业英语表达习惯•3、读懂卡罗拉英文维修手册二、温故而知新（一）温习已学知识•Subsystem•Induction•Diagnostic•Solenoid•Clockwise•Ohmmeter•Harness•Connector•Malfunction（一）温习已学知识•Airinductionsystem•computerground•sensorground•Electroniccontrolsystem•Electronicfuelinjection•Fueldeliverysystem•Handheldtester•Inspectionprocedure•Portfuelinjection•Rotorsolenoid（二）学习新知识•1、重点词汇•Coolant冷却液，冷却剂•Radiator散热器，水箱•Thermostat节温器•Reservoir储液罐•Deposit沉积物•Rust生锈，•Scale水垢•Contamination污染物（二）学习新知识•2、重点短语•Waterpump水泵•Waterjacket水套•Combustionchamber燃烧室•Radiatorcaptester散热器盖测试仪•Heatercore暖风机（散热器）芯•Cylinderblock汽缸体•Cylinderhead汽缸盖•Reliefvalve减压阀•Radiatordrainplug散热器放液塞3、课文学习•Heatalwaysmovesfromahotobjecttoacoolerobject，sothecoolingsystemtransfersheatfromtheenginetothecirculatingcoolant。•热量总是从高温物体向低温物体转移，因此，冷却系统将发动机的热量传递给循环的冷却液。•Thetemperaturecontrolandheattransferarebasedonthepressureofthesystemandcoolantcirculation。•温度控制和热传递是根据系统压力和冷却液循环的。ToyotaCorollaRepairManual•Beforeservicingthecoolingsystem，youneedtopayparticularattentiontothefollowing：•Toavoidthedangerofbeingburned，donotremovethereservoircapwhiletheengineandtheradiatorarestillhot，asfluidandsteamcanbeblownoutunderpressure。•Hint：ifthepressuredrops，checkthehoses，radiatororwaterpumpforleaks。Ifnoexternalleaksarefound,checktheheatercore,thecylinderblockandthehead。•Checkenginecoolantquality•（1）removetheradiatorcap（pleasepayparticularattentiontobeburned）。•（2）checkifthereareanyexcessivedepositsofrustorscalearoundtheradiatorcapandradiatorfillerholes。Thecoolantshouldbefreefromoil。•Notice：•Standardopeningpressure：74-103kpa；Minimumopeningpressure：59kpa。Thispumpspeedisforthefirstpumponly（inordertoclosethevacuumvalve）。Afterthat，thepumpspeedcanbereduced。课堂练习•1、Thecoolingsystemcontrolstemperaturethrough（）•A、heattransfer；B、airflow；C、sensors；D、ECU•2、Usingaradiatorcaptester，slowlypumpthetesterandcheckthatAiriscomingfromthevacuumvalve。Ifairisnotcomingfromthe（），replacethereservoircap。•A、vacuumvalve；B、pump；C、tester；D、radiator•3、Theenginecoolantlevelischeckedwhentheengineis（）only。•A、hot；B、warm；C、cold；D、coolAAC•课后练习：•1、单词抄写•2、P51（part4翻译句子7、8、10）