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APPROVEDBYNQTSBON19990310ENFORCEMENTDATE20000101NATIONALSTANDARDOFTHEPEOPLESREPUBLICOFCHINAMEASUREMENTMETHODSOFNETPOWERFORAUTOMOTIVEENGINESGB/T1769219991SCOPETHISSTANDARDSTIPULATESTHEMEASUREMENTMETHODSOFNETPOWERFORAUTOMOTIVEENGINESTHISSTANDARDAPPLIESTOREPRESENTATIONOFCURVEASAFUNCTIONOFENGINESPEEDOFTHEPOWERATFULLLOADINDICATEDBYTHEMANUFACTURERFORINTERNALCOMBUSTIONENGINESINTENDEDFORTHEPROPULSIONOFMOTORVEHICLESOFCATEGORIESMANDNTHISSTANDARDAPPLIESTORECIPROCATINGPISTONENGINESPOSITIVEIGNITIONORCOMPRESSIONIGNITIONORROTARYPISTONENGINESPOSITIVEIGNITIONORCOMPRESSIONIGNITION,BUTEXCLUDINGFREEPISTONENGINES2REFERENCETHEFOLLOWINGSTANDARDSCONTAINPROVISIONS,WHICH,THROUGHREFERENCEINTHISTEXT,CONSTITUTEPROVISIONSOFTHISSTANDARDATTIMEOFPUBLICATIONTHEEDITIONSINDICATEDWEREVALIDALLSTANDARDSARESUBJECTTOREVISION,ANDPARTIESTOAGREEMENTSBASEDONTHISSTANDARDAREENCOURAGEDTOINVESTIGATETHEPOSSIBILITYOFAPPLYINGTHEMOSTRECENTEDITIONSOFTHESTANDARDSINDICATEDBELOWSH00411993AUTOMOTIVEUNLEADEDGASOLINE3DEFINITIONSFORTHEPURPOSESOFTHISSTANDARD31“APPROVALOFANENGINE“MEANSTHEAPPROVALOFANENGINETYPEWITHREGARDTOITSNETPOWERMEASUREDINACCORDANCEWITHTHEPROCEDURESPECIFIEDANNEXCOFTHISSTANDARD32“ENGINETYPE“MEANSACATEGORYOFANENGINEFORINSTALLATIONINAMOTORVEHICLEWHICHDOESNOTDIFFERINSUCHESSENTIALCHARACTERISTICSASTHOSEDEFINEDINANNEXATOTHISSTANDARD33“NETPOWER“MEANSTHEPOWEROBTAINEDONATESTBENCHATTHEENDOFTHECRANKSHAFTORITSEQUIVALENTATTHECORRESPONDINGENGINESPEEDWITHTHEAUXILIARIESLISTEDINTABLE1OFANNEXCTOTHISSTANDARD,ANDDETERMINEDUNDERREFERENCEATMOSPHERICCONDITIONS4TYPEAPPROVALIFTHEPOWEROFTHEENGINESUBMITTEDFORAPPROVALPURSUANTTOTHISSTANDARDHASBEENMEASUREDACCORDINGTOTHESPECIFICATIONSOFPARAGRAPH5BELOW,APPROVALOFTHEENGINETYPESHALLBEGRANTEDWWWBZFXWCOMGB/T1769219995SPECIFICATIONSANDTESTS51GENERALTHECOMPONENTSLIABLETOAFFECTTHEPOWEROFTHEENGINESHALLBESODESIGNED,CONSTRUCTEDANDASSEMBLEDASTOENABLETHEENGINEINNORMALUSE,DESPITETHEVIBRATIONTOWHICHITMAYBESUBJECTED,TOCOMPLYWITHTHEPROVISIONSOFTHISSTANDARD52DESCRIPTIONOFTESTS521THENETPOWERTESTSHALLCONSISTOFARUNATFULLTHROTTLEFORPOSITIVEIGNITIONENGINESANDATFIXEDFULLLOADFUELINJECTIONPUMPSETTINGFORDIESELENGINES,THEENGINEBEINGEQUIPPEDASSPECIFIEDINTABLE1OFANNEXCTOTHISSTANDARD522MEASUREMENTSSHALLBETAKENATASUFFICIENTNUMBERMORETHAN8OFENGINESPEEDSTODEFINECORRECTLYTHEPOWERCURVEBETWEENTHELOWESTANDTHEHIGHESTENGINESPEEDSRECOMMENDEDBYTHEMANUFACTURERTHISRANGEOFSPEEDSMUSTINCLUDETHESPEEDSOFREVOLUTIONATWHICHTHEENGINEPRODUCESITSMAXIMUMPOWERANDITSMAXIMUMTORQUE523THEFUELUSEDSHALLBEONEAVAILABLEONTHEMARKETINANYCASEOFDISPUTE,THEFUELSHALLBEONEOFTHEREFERENCEFUELSDEFINEDBYANNEXETOTHISSTANDARD524MEASUREMENTSSHALLBECARRIEDOUTACCORDINGTOTHEPROVISIONOFANNEXCTOTHISSTANDARD525THETESTREPORTSHALLCONTAINTHERESULTSANDALLTHECALCULATIONSREQUIREDTOFINDTHENETPOWER,ASLISTEDINTHEAPPENDIXCATOANNEXCTOTHISSTANDARDTOGETHERWITHTHECHARACTERISTICSOFTHEENGINELISTEDINANNEXATOTHISSTANDARD53INTERPRETATIONOFRESULTSTHENETPOWERINDICATEDBYTHEMANUFACTURERFORTHETYPEOFENGINESHALLBEACCEPTEDIFITDOESNOTDIFFERBYMORETHAN2FORMAXIMUMPOWERANDMORETHAN4ATTHEOTHERMEASUREMENTPOINTSONTHECURVEWITHATOLERANCEOF15FORENGINESPEED,FROMTHEVALUESMEASUREDBYTHETECHNICALSERVICEONTHEENGINESUBMITTEDFORTESTING6CONFORMITYOFPRODUCTION61FORVERIFYINGWHETHERTHEENGINEPRODUCTSCONFORMTOTHEAPPROVEDENGINETYPE,CONFORMITYPRODUCTIONCHECKSSHALLBECARRIEDOUTACCORDINGTOANNEXDTOTHISSTANDARDGB/T176921999ANNEXAANNEXTOTHISSTANDARDESSENTIALCHARACTERISTICSOFTHEENGINEANDINFORMATIONCONCERNINGTHECONDUCTOFTESTS1/ALDESCRIPTIONOFENGINEAL1MAKEA12TYPEA13WORKINGPRINCIPLEPOSITIVEIGNITION/COMPRESSIONIGNITION/FOURSTROKE/TWOSTROKE3/A14BOREMMAL5STROKEMMA16NUMBERANDLAYOUTOFCYLINDERSANDFIRINGORDERA17CYLINDERCAPACITYCM3A18COMPRESSIONRATIO2/A19DRAWINGSOFCOMBUSTIONCHAMBERANDPISTONCROWNA110MINIMUMCROSSSECTIONALAREAOFINLETANDOUTLETPORTSAL11COOLINGSYSTEMLIQUID/AIRCOOLING3/AL111CHARACTERISTICSOFLIQUIDCOOLINGSYSTEMNATUREOFLIQUIDCIRCULATINGPUMPYES/NO3/CHARACTERISTICSOFMAKESANDTYPESOFTHEPUMPDRIVERATIOTHERMOSTATSETTINGRADIATORDRAWINGSORMAKESANDTYPESRELIEFVALVEPRESSURESETTINGFANCHARACTERISTICSORMAKESANDTYPESFANDRIVESYSTEMDRIVERATIOFANCOWLA1112CHARACTERISTICSOFAIRCOOLINGSYSTEMBLOWERCHARACTERISTICSORMAKESANDTYPESDRIVERATIOAIRDUCTINGSTANDARDPRODUCTIONTEMPERATUREREGULATINGSYSTEMYES/NO3/BRIEFDESCRIPTIONWWWBZFXWCOMGB/T176921999A1113TEMPERATUREPERMITTEDBYTHEMANUFACTUREAL1131LIQUIDCOOLINGMAXIMUMTEMPERATUREATENGINEOUTLETAL1132AIRCOOLINGREFERENCEPOINTMAXIMUMTEMPERATUREATREFERENCEPOINTA11133MAXIMUMCHARGEAIRTEMPERATUREATREFERENCEPOINTAL1134FUELTEMPERATUREMINMAXAL1135LUBRICANTTEMPERATUREMINMAXA112SUPERCHARGERYES/NO3/DESCRIPTIONOFTHESYSTEMA113INTAKESYSTEMINTAKEMANIFOLDDESCRIPTIONAIRFILTERMAKETYPEINTAKESILENCERMAKETYPEA2ADDITIONALANTIPOLLUTIONDEVICESIFANY,ANDIFNOTCOVEREDBYANOTHERHEADINGDESCRIPTIONANDDIAGRAMSA3AIRINTAKEANDFUELFEEDA31DESCRIPTIONANDDIAGRAMSOFINLETPIPESANDTHEIRACCESSORIESDASHPOT,HEATINGDEVICE,ADDITIONALAIRINTAKES,ETCA32FUELFEEDA321BYCARBURETORS3/NUMBERA3211MAKEA3212TYPEA3213ADJUSTMENTS2/A32131JETSA32132VENTURISORA32133FLOATCHAMBERLEVELA32134MASSOFFLOATA32135FLOATNEEDLECURVEOFFUELDELIVERY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