电动马达驱动泵控制的液压动力转向系统的发展外文翻译

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1、外文翻译原文DevelopmentofControlledElectricMotor-DrivenPumpTypeHydraulicPowerSteeringSystemY.ObataY.TeramaeK.YamamotoWithinaframeofdevelopmentofecologicalpowersteeringsystems,wehavecompletedthedevelopmentofanelectricmotor-drivenpumptypehydraulicpowersteeringsystem,equippedwithnotconvention

2、albrushedmotorbutbrushlessmotorcontrolledbyECU,whichhasachievedafurtherenergysaving.Thefollowingdescribesthecontentofthissystem.keywords:energysaving,hydraulicpowersteering,brushlessmotor1.IntroductionFromaviewpointofrecentglobalecologicalproblems,animprovementoffuelconsumptionandexh

3、austgasregulationssuchastheJapaneseAutomobileNOxlawhavebeencomingtobeworldwideimportantissues.Regulationsandtaxationsthateachcountrytendstoimposeforenvironmentalprotectionareenumeratedasfollows①Europe:Introductionofcarbontaxationineachcountry②Japan:Regulationoffuelconsumptionsince200

4、0③U.S.A.:IntensificationofCAFE(CorporateAverageFuelEconomy)regulation,activityofEPA(EnvironmentalProtectionAgency)andARB(AirResourcesBoard)Ontoday'svehiclesdrivenbygasolineengineordieselengine,ahydraulicpowersteering(calledhereafter"NPS")ofwhichthepowersourceisanengine-drivenhydrauli

5、cpumpisgenerallymounted.Inthispowersteeringsystem,ahydraulicpumpasmentionedaboveisrotatedinproportionwitharevolutionspeedofengineandrunsathighrevolutionspeedevenduringastraight-aheadandhigh-vehiclespeeddrivingwithnosteeringoperation,regardlessofanecessityforpowerassistance,sothatital

6、waysconsumesawastefulenergy.Itissaidthatanenergyconsumedbysuchpowersteeringsystemrepresentsapproximately3%ofallthevehiclefuelconsumption.Therefore,arequestforenergysavinginsuchpowersteeringsystemwouldbemoreandmoreintensifiedhereafter.Infact,theconventionalengine-drivenhydraulicpumpsh

7、avebeensubjectedtodifferenttrialssuchasanapplicationoflowerflowratewithhigherpressureandanimplementationofenergysaving.Howeverthesetrialshaveexertedaneffectnotdrasticbutlimitedtocertainextentonthefueleconomy.Inresponsetoarequestforfurtherfueleconomy,wehavedevelopedanenergysavingtypep

8、owersteering