ImprovementsofEnergyEfficiencyunderElectricDrivingModeforPluginHybridElectricVehicles

ImprovementsofEnergyEfficiencyunderElectricDrivingModeforPluginHybridElectricVehicles.pdf
Thepossibilitytoimprovetheenergyefficiencyofaplug-inhybridelectricvehicle(PHEV)ofplanetarygearpowersplitconfigurationisinvestigatedinthisstudy.Withoneofthetwoelectricmotorsconnectingtothesungearandtheotherconnectingtotheringgear,theenergyefficiencyofasystemconsistingofasimpleplanetarysetcontrolledbytwoclutchesisevaluatedbynumericalmodelinginMatlab.ItisfoundthattheenergyconsumptionsofthevehicleonNEDCcycleunderelectricallyvariabletransmission(EVT)operatingmodeis4.2#higherthanthatoffixedgearmodewithtwodistinctspeedratios(1-motor2-SpeedFG).ItisalsointerestingtonoticethatthemostenergyefficientwaytooperateintheEVTmodeisoftentokeeponeoftheelectricmotorsinstallcondition,whiletheotherelectricmotoroperatesinrelativelyhighspeedregion.SimilartotheFGmodeinphysics,thisbehaviorofEVTsystemcanbereferredtoas"quasi-FG"operatingmode.ThehigherenergyconsumptioninEVTmodeisprimarilycausedbytheexcessivetorqueandpoweravailablefrombothelectricmotorsinsteadofoneelectricmotorin1-motor2-SpeedFGmode.Toclarifythis,apostulatedcaseofasystemdrivenbytwoelectricmotorsoperatingin2-SpeedFGmode(2-motor2-SpeedFG)isalsostudied.TheresultsindicatetheenergyconsumptioninEVTmodeisnearly3.0#lowerthanthatinthe2-motor2-SpeedFGmode.Furthermore,thepossibilitytosimplifytheconfigurationandtoreducethecostofthesystemisproposedbytakingadvantageof"quasi-FG"typeofcontrolinEVToperatingmode.TominimizethebatterypowerconsumptioninEVTmode,itiscriticaltoreducethepowerrecirculation.With"quasi-FG"controlstrategy,thepowerrecirculationcanbecompletelyeliminatedandthesystemefficiencycanbemaximizedeventhoughthestalledelectricmotoroperatesatarelativelylowefficiency.Finally,amodeshiftmapbasedonminimalbatterypowerconsumptionisproposed.
作者：WANGLiYUANYiqingSHILinjie
作者单位：TongjiUniversity
母体文献：2018中国汽车工程学会年会论文集
会议名称：2018中国汽车工程学会年会  
会议时间：2018年11月1日
会议地点：上海
主办单位：中国汽车工程学会
语种：chi
分类号：
关键词：PHEV  EVT  energyefficiency  powerrecirculation
在线出版日期：2021年9月26日
基金项目：
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ImprovementsofEnergyEfficiencyunderElectricDrivingModeforPluginHybridElectricVehicles.pdf

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