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1、本科毕业设计（论文）——外文翻译题目液压助力转向试验台的设计姓名AAAA专业交通运输学号指导教师AAAA郑州科技学院车辆与交通工程系二〇一五年三月DevelopmentofControlledElectricMotor-DrivenPumpTypeHydraulicPowerSteeringSystemY.ObataY.TeramaeK.YamamotoInautomobiledevelopmentcourse,Steeringsystemexperiencedfourstagesofdevelopment:fromtheinitialmechanicalSteeringsystem(f
2、oryourDNSsettingSteering,abbreviationMS)developmentforHydraulicSteeringsystem(HydraulicPowerSteering,abbreviationHPS),thenagainappearedelectronicallycontrolledHydraulicSteeringsystem(ElectroHydraulicPowerSteering,abbreviationEHPS)andElectricPowerSteeringsystem(Steering,roomPowerasEPS).Assemblemec
3、hanicalsteeringsystemofcarparkingandlow-speeddriving,whenthedriver’ssteeringcontrolburdentooheavy,inordertosolvethisproblem,theAmericanGMinthe1950stooktheleadinthecarhydraulicsteeringsystem.Buthydraulicsteeringsystemcan’tjugglevehiclestospeedportabilityandhighspeed,sothesteeringstabilityKoyoinJap
4、ain1983,withthecompanyintroducedtheapplicationofspeedsensingfunctionofhydraulicsteeringsystem.Thisnewtypeofsteeringsystemcanprovidespeedincreasedwiththedecreasingsteering,butcomplicatestructure,costishigher,andcannotovercomehydraulicsystemitselfhasmanyshortcomings,isacrossbetweenahydraulicsteerin
5、gandelectricpowersteeringthetransitionbetweentheproducts.In1988,JapanSuzukicompanyfirstinsmallcarequippedwithCervoKoyocompanydevelopmentonthesteeringcolumn,powertypeelectricpowersteeringsystem;In1990,JapanHondaNSXinsportscarcompanyadoptedself-developedrackpowertypeelectricpowersteeringsystem,henc
6、eforthunveilstheelectricpowersteeringincarapplicationshistory.Alongwiththevehiclescarryingcapacityincreaseaswellasthepeopletothevehicleshandlingqualityrequestenhancement,thesimplemechanicaltypesteeringsystemwerealreadyunabletomeettheneeds,thepowersteeringsystemariseatthehistoricmoment,itcouldrota
7、tethesteeringwheelwhilethepilottoprovidetheboost,thepowersteeringsystemdividesintothehydraulicpressuresteeringsystemandtheelectricallyoperatedsteeringsystem2kinds.Hydraulicpressuresteeringsystemisatpresentusesthemostwi
