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,equippedwithnotconventionalbrush

2、edmotorbutbrushlessmotorcontrolledbyECU,whichhasachievedafurtherenergysaving.Thefollowingdescribesthecontentofthissystem.keywords:energysaving,hydraulicpowersteering,brushlessmotor1.IntroductionFromaviewpointofrecentglobalecologicalproblems,animprovementoffuelconsumptionandexhaustgasregulat

3、ionssuchastheJapaneseAutomobileNOxlawhavebeencomingtobeworldwideimportantissues.Regulationsandtaxationsthateachcountrytendstoimposeforenvironmentalprotectionareenumeratedasfollows①Europe:Introductionofcarbontaxationineachcountry②Japan:Regulationoffuelconsumptionsince2000③U.S.A.:Intensificat

4、ionofCAFE(CorporateAverageFuelEconomy)regulation,activityofEPA(EnvironmentalProtectionAgency)andARB(AirResourcesBoard)Ontoday'svehiclesdrivenbygasolineengineordieselengine,ahydraulicpowersteering(calledhereafter"NPS")ofwhichthepowersourceisanengine-drivenhydraulicpumpisgenerallymounted.Inth

5、ispowersteeringsystem,ahydraulicpumpasmentionedaboveisrotatedinproportionwitharevolutionspeedofengineandrunsathighrevolutionspeedevenduringastraight-aheadandhigh-vehiclespeeddrivingwithnosteeringoperation,regardlessofanecessityforpowerassistance,sothatitalwaysconsumesawastefulenergy.Itissai

6、dthatanenergyconsumedbysuchpowersteeringsystemrepresentsapproximately3%ofallthevehiclefuelconsumption.Therefore,arequestforenergysavinginsuchpowersteeringsystemwouldbemoreandmoreintensifiedhereafter.Infact,theconventionalengine-drivenhydraulicpumpshavebeensubjectedtodifferenttrialssuchasana

7、pplicationoflowerflowratewithhigherpressureandanimplementationofenergysaving.Howeverthesetrialshaveexertedaneffectnotdrasticbutlimitedtocertainextentonthefueleconomy.Inresponsetoarequestforfurtherfueleconomy,wehavedevelopedanenergysavingtypepowersteering