qct548-99标准（英文版）

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1、.ExplanationonStandardTransferringAccordingtotherequirementsofZhijijianjuNo.216[1998]BiddingLetterbyNationalBureauofQualityandTechnicalSupervisionandGuojiguanNo.126[1999]AdministrativeReplybyStateAdministrationofMachineryIndustry,wenowtransfertheoriginalstandardcodeJB3918-85tothepresentindustrialsta

2、ndardcodeQC/T548-1999withoutchangingthecontents.Pleaseusethenewstandardcodewhenquotingit.ChinaMinistryofMachineBuildingIndustryStandardTechnicalConditionsforAutomobileWasherMotorJB3918-85Thisstandardisapplicabletoautomobilewindscreenwashermotor(hereafterreferredtomotor).Themotorismadeupofashort-time

3、dutyDCmotorandawasherpump.Themotorhastwotypesofstructures:Atype(themotorisinstalledontheliquidreservetank),Btype(themotorisseparatedfromtheliquidreservetank).Thisstandardisalsoapplicabletothemotorsusedindampandhotregions.1.TechnicalRequirements1.1Themotorshallmeettherequirementsofthisstandardandthos

4、eofJB2261-77(BasicTechnicalConditionsofAutomotiveandTractorElectricalEquipment),JB3921.1-85(TechnicalConditionsforAutomobileWindscreenElectricWasher)andJB3921.2-85(TestingMethodsforAutomobileWindscreenElectricWasher),andthemotorshallbemanufacturedaccordingtothedrawinganddocumentsauthorizedbyspecifie

5、dprocedure.ThemotorstobeusedinhotanddampregionsshallcomplywiththespecificationsofJB517-77(TechnicalConditionsforDamp-hotTypeAutomobileandTractorElectricalEquipment).1.2Whenthemediumtemperaturearoundthemotoris-25~80℃,itsperformanceshallcomplywiththespecificationsof1.4.1.3Themotorinsulationresistances

6、hallbenolessthan1MΩ.1.4Whenthepressureofwaterdischargedbythemotorwasherpumpis88kPa(0.9kgf/cm2),thedischargevolumewithin10secondsshallbenolessthel00mL.Withthevalveclosed(SeeFigure1andFigure2),thepressureshallbenolessthan137kPb(1.4kgf/cm2).TheBtypemotorshallbeselfprimingandputoutwaterwithin10secondsaf

7、teritisswitchedon.1.5Theloadcurrentsofthemotorat25±10℃areasfollows:≤3Aforthemotorproviding12Vofnominalvoltage;≤1.5Aforthemotorproviding24Vofnominalvoltage.1.6Whenthetemperatureislowandthewaterintheliq