本章學習內容Chapter4TransmissionSystems

傳動系統

本章學習目標本章難點重點4.1ClassificationofHybridDrive

混合動力的分類4.2PassengerCarHybridDrive

乘用車混合動力傳動系統1.掌握混合動力的分類方法；2.掌握典型混合動力驅動系統的結構、工作原理；1.重點：混合動力系統原理、英文專業術語；2.難點：傳動原理上次課學習內容Chapter4TransmissionSystems

傳動系統

4.1ClassificationofHybridDrive4.2PassengerCarHybridDrive4.2.1BMW6-speedparallelhybridpassengercarautomaticgearbox4.1ClassificationofHybridDrive混合動力的分類

Accordingtothelayoutoftheprimemovers,hybriddrivescanbedividedintoserialhybridparallelhybridpower-splithybrid(alsocalledseries-parallelhybrid)

Categorizebytheirlevelsofhybridizationmildhybrid.mediumhybrid.Fullhybrid.4.2PassengerCarHybridDrive乘用車混合動力傳動系統

BMWparallelhybridautomaticgearbox

回顧提問Howtoclassifyhybrids?Whatarethecategories?混合動力怎樣分類？分為哪幾類？BrieflydescribetheworkingprincipleofBMWparallelhybrid.簡述BMW并聯式混合動力的工作原理。本次課學習內容Chapter4TransmissionSystems

傳動系統

本次課學習目標本次課難點重點4.2PassengerCarHybridDrive

乘用車混合動力傳動系統4.2.2Toyota/LexusPower-SplitHybridTransmissions1.掌握典型功率分流混合動力驅動系統的結構、工作原理；1.重點：混合動力系統原理、英文專業術語；2.難點：傳動原理4.2PassengerCarHybridDrive乘用車混合動力傳動系統4.2.2Toyota/LexusPower-SplitHybridTransmissionsOperationWhilethecontrolsystemiscomplex,thebasictransaxleofToyota/Lexushybridsystemisverysimpleindesignasitisbuiltaroundasingleplanetarygearset(power-splitdevice)andtwoelectricmotor/generators(MG1andMG2),asshowninFigure4.7.Thepower-splitdeviceisconnectedtotheICengine,MG1andMG2,seeFigurePassengerCarHybridDrive乘用車混合動力傳動系統Figure4.7ThebasictransaxleofToyota/Lexushybridsystem4.2PassengerCarHybridDrive乘用車混合動力傳動系統Figure4.8Thepower-splitdevice4.2PassengerCarHybridDrive乘用車混合動力傳動系統Figure4.9Whenthevehicleisstopped,theICEisshutoffalongwithbothmotor/generators

·VehicleStopped.Whenthevehicleisstopped,nothingishappeningwiththevehicledrivesystem.TheICEisshutoff,andbothelectricmotors/generatorsareshutoffaswell,asshowninFigurePassengerCarHybridDrive乘用車混合動力傳動系統Figure4.10Underlightacceleration,electricalpowerissendtoMG2tomovethevehicle·LightAcceleration.Whenthevehicleisdrivenatlowspeedsandlightacceleration,itisdrivenbyMG2alone.SeeFigurePassengerCarHybridDrive乘用車混合動力傳動系統

CurrentfromtheHVbatteryissentthroughtheinverterandontoMG2tomovethevehicle.Whentheengineisstopped(0RPM),MG2isturningforward,andthiscausesMG1toturnbackward.SeeFigurePassengerCarHybridDrive乘用車混合動力傳動系統·NormalDriving.Whenhighervehiclespeedsarerequired,theICEmustbestartedsothatitsoutputcanbecombinedwiththatofMG2.SeeFigure4.11.Figure4.11Undernormaldriving,theICengineisnowrunningandsomeofitstorqueisusedtodriveMG1.ElectricitygeneratedbyMG1isusedtopowerMG2orrechargetheHVbattery.4.2PassengerCarHybridDrive乘用車混合動力傳動系統Theringgearisalreadyturningclockwiseasthevehicletravelsinaforwarddirection.Sincetheplanetcarrier(attachedtotheICE)isstationary,thesungear(drivenbyMG1)isusedtodrivetheplanetcarrierclockwiseandstarttheICE.CurrentfromtheHVbatteryisdirectedthroughtheinverterandoperatesMG1asamotor,turningclockwiseandspinningtheICEupto1,000RPMforstarting.OncetheICEisstarted,MG1operatesasagenerator,butturnsinthecounterclockwisedirection.ICEoutputisnowdividedor"split"betweenthedrivewheels(ringgear)andMG1(sungear).PowergeneratedbyMG1iseitherdirectedtoMG2tohelpmovethevehicleorisusedtorechargetheHVbatteryifnecessary.4.2PassengerCarHybridDrive乘用車混合動力傳動系統Figure4.12Duringfull-throttleaccelerationandhigh-speedcruise,electricpowerfromMG1iscombinedwiththepowerfromtheHVbatterytogenerategreateroutputfromMG2.·Full-ThrottleAcceleration.

Whengreateraccelerationisrequired,bothMG2andtheICenginecontinuesendingtorquetothevehicledrivewheels,butMG2canalsoreceivepowerfromtheHVbatterytoincreaseitsoutput,asshowninFigurePassengerCarHybridDrive乘用車混合動力傳動系統·DecelerationandBraking.Asthevehicleisdecelerating,MG2operatesasagenerator.ThekineticenergyofthevehicleisthenconvertedintoelectricalenergybyMG2.TheICengineandMG1areshutoff,andcurrentfromMG2issentthroughtheinverterandisthenusedtorechargetheHVbattery,asshowninFigure4.13.Figure4.13Duringdecelerationandbraking,MG2operatesasageneratorandrechargetheHVbattery4.2PassengerCarHybridDrive乘用車混合動力傳動系統·Reverse.

Ifreverseisselected,powerissentfromtheHVbatterytotheinverterandthenontoMG2,asshowninFigure4.14.MG2operatesinthereversedirectiontobackupthevehicle,buttheothercomponentsinthedrivesystemareturnedoffatthistime.Figure4.14Duringreverse,powerissentfromtheHVbatterytotheinverterandthentoMG2ConstructionFigure4.15andFigure4.16showthedesignoftheToyota/LexusP310power-splithybridtransmissionwithtwoelectricmachines.ThishybridtransmissionwithintegratedfrontaxledifferentialisusedinSUVswithtransverseenginesandfront-wheeldrive.Figure4.15Toyota/LexusP310power-splithybridgearbox4.2PassengerCarHybridDrive乘用車混合動力傳動系統Boththeelectricmotorandthegeneratorarepermanentmagnetthree-phasesynchronousmotors(PSM)operatedinsidethegearbox,heoilarea.ThetwoelectricmachinesarecooledbothviatheATFoil,whichconductstheirwasteheatawaythroughthegearboxhousingandintothesurroundingarea,andviaacoolingwaterjacketaroundthestatorsoftheelectricmachines,whichiscoupledwiththecoolingwatercirculationofthevehicle*2.*2ThetwoelectricmachinesarecooledbothviatheATFoil,whichconductstheirwasteheatawaythroughthegearboxhousingandintothesurroundingarea,andviaacoolingwaterjacketaroundthestatorsoftheelectricmachines,whichiscoupledwiththecoolingwatercirculationofthevehicle.

句子分析：本句的總體結構是主句后面跟著both…and…連接的兩個并列介詞短語，而每個介詞短語都有一個定語從句。both…and…連接的兩個介詞短語，譯成“既要…，又要…”。第一個定語從句whichconducts…修飾ATFoil，第二個定語從句whichiscoupledwith…修飾coolingwaterjacket。因為兩個定語從句較長，故單獨譯出。

疑難句子分析*2ThetwoelectricmachinesarecooledbothviatheATFoil,whichconductstheirwasteheatawaythroughthegearboxhousingandintothesurroundingarea,andviaacoolingwaterjacketaroundthestatorsoftheelectricmachines,whichiscoupledwiththecoolingwatercirculationofthevehicle.參考譯文：這兩臺電機既要通過ATF油冷卻又要通過電機定子周圍的冷卻水套進行冷卻。ATF油通過變速箱外殼將廢熱傳送到周圍區域，冷卻水套與車輛的冷卻水循環系統相連接。疑難句子分析

Acentralassemblyofthishybridtransmissionisthefirstplanetarygearbox,thesummarisinggear,whichcouplestheenginecrankshaftwiththeoutput(connectedringgearsofthesummarisingandreductiongears)andthegenerator(sungear).Inthisway,itispossibletoexploittheenginepowerbothtodrivethegears-supportedwhennecessarybytheelectricmotor-andtodrivethegenerator.

Figure4.16Powersplithybridgearbox(Toyota/LexusP310)4.2PassengerCarHybridDrive乘用車混合動力傳動系統Thepowertraincantakeoncertainpropertiesofanall-wheeldriveiftherearaxleofthevehicleiselectrifiedbymeansofacombinationofth