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JAPANESEAUTOMOBILESTANDARDDIVISIONMIM2M3JASOC4282001APPLICATIONTOTALWEIGHTPASSENGERCAPACITYPASSENGERCAR5TORLESS9PEOPLEORLESSCLASS1BUS5TORLESSOVER10PEOPLECLASS2BUSOVER5TOVER10DEODLEROADVEHICLESPARKINGBRAKETESTPROCEDURE1SCOPEPROPEROPERATIONTHESESPECIFICATIONSARENOTAPPLICABLETOMOTORCYCLES,MOTORCYCLESWITHSIDECAR,LIGHTMOTORVEHICLESWITHCATERPILLARORSLEDGEORAUTOMOBILESWITHAMAXIMUMSPEEDOFLESSTHAN25KMLHTHISSTANDARDSPECIFIESTESTPROCEDURESFORPARKINGBRAKESINSTALLEDONACTUALVEHICLESTOCONFIRMNIN2N3O10203042APPLICABLEPUBLICATIONSTHEFOLLOWINGPUBLICATIONSFORMAPARTOFTHISSTANDARDTOTHEEXTENTSPECIFIEDHEREINTHELATESTEDITIONOFALLPUBLICATIONSSHALLAPPLYIICLASS1TRUCK35TORLESSCLASS2TRUCKOVER35TTO12TCLASS3TRUCKOVER12TCLASS1TRAILERTOTALAXLELOAD075TORLESSCLASS2TRAILERTOTALAXLELOADOVER075TTO35TCLASS3TRAILERTOTALAXLELOADOVER35TTO10TCLASS4TRAILERTOTALAXLELOADOVER10TJISDO210JASOC436GENERALRULESOFBRAKETESTMETHODFORAUTOMOBILESANDMOTORCYCLESPARKINGBRAKEDEVICEDYNAMOMETERTESTPROCEDURESDIVISIONTYPEATYPEBTYPECCENTER3DEFINITIONSDEFINITIONSOFMAJORTERMSUSEDHEREIN,OTHERTHANTHETERMSTATEDBELOW,AREASSPECIFIEDINJISINITIALBRAKETEMPERATURED0210,ITEM2TEMPERATUREATWHICHBRAKEAPPLICATIONISINITIATEDTYPEFREQUENTUSEOFFRICTIONMATERIALFORMAINBRAKESBUILTINTOWHEELBRAKEFREQUENTUSEOFFRICTIONMATERIALFORPARKINGBRAKEBUILTINTOWHEELBRAKEEXCLUSIVEUSEOFFRICTIONMATERIALFORPARKINGBRAKEMOUNTEDON4TESTCONDITIONS41411VEHICLEDIVISIONSVEHICLESANDPARKINGBRAKEDIVISIONSTESTVEHICLESSHALLBECLASSIFIEDINTODIVISIONSACCORDINGTOAPPLICATION,TOTALWEIGHTANDPASSENGERCAPACITYASSPECIFIEDINTABLE1TABLE1VEHICLEDIVISIONS412PARKINGBRAKEDIVISIONSPARKINGBRAKESSHALLBECLASSIFIEDINTODIVISIONSACCORDINGTOTYPEASSPECIFIEDINTABLE2TABLE2PARKINGBRAKEDIVISIONSITYPEITRANSMISSIONORTRANSMISSIONSHAFT42VEHICLECONDITIONREQUIREMENTSAREASSPECIFIEDINJISD0210,ITEM41REQUIREMENTSAREASSPECIFIEDINJISD0210,ITEM4343CONDITIONOFINDIVIDUALBRAKEPARTS44TRACKANDWEATHERCONDITIONSREQUIREMENTSAREASSPECIFIEDINJISD0210,ITEM421JASOC4282001INITIALBRAKESPEEDKMLHPREBRAKINGBRAKETEMPERATURE“CBRAKINGDECELERATIONSPEEDMLSBRAKINGREPETITIONSTIMES45TEMPERATUREMEASUREMENT46LEVEROPERATINGFORCEAOPERATINGFORCEFORHANDOPERATEDTYPES,SHALLBEMEASUREDATTHECENTEROFHANDGRIPREQUIREMENTSAREASSPECIFIEDINJISD0210,ITEM6REQUIREMENTSAREASSPECIFIEDBELOWWHENTHECENTERISNOTEASILYDISTINGUISHED,THEMEASUREMENTPOINTSHALLBE40MMFROMTHETIPOFTHELEVEREXCLUDINGTHEBUTTONPORTIONBACALIBRATEDOPERATINGFORCEMETERORANEQUIVALENTINSTRUMENTSHALLBEUSEDMEASUREMENTISNOTREQUIREDFORSPRINGBRAKESCOPERATINGFORCESHALLBEAPPLIEDINTHEDIRECTIONUSEDTOAPPLYTHEBRAKELEVERORBRAKEPEDAL47FITTINGCONDITIONSSPECIFIEDINTABLES3AND4,PARKINGBRAKEDIVISIONATYPEAANDTYPECCENTERTESTSSHALLBECONDUCTEDINTHEFORWARDDIRECTIONFITTINGSHALLBEPERFORMEDUNDERTHECONDITIONSREQUIREMENTSAREASSPECIFIEDINTABLE3TYPEATYPECMINIM2,M3,N2,N3I01,02,03,04ALLDIVISIONS656060101201201501O03530301O20020030030TABLE3FITTINGCONDITIONSFORTYPEAANDTYPECCENTERINITIALBRAKESPEEDKMLHPREBRAKINGBRAKETEMPERATURE“COPERATINGFORCENBRAKINGTIMESBRAKINGREPETITIONSTIMESALLDIVISIONS30100ORLESS5HANDOPERATION100,PEDALOPERATION15030BTYPEBADRAGGINGTESTSHALLBEPERFORMEDASSPECIFIEDINTABLE4CONDITIONSSHALLBEINACCORDANCEWITHTHEREQUIREMENTSOFJASOORTHEAUTOMOBILEMANUFACTURERTHEDRAGGINGMETHODISNOTAPPLICABLETOSPRINGBRAKES,ANDTHEREFORETHESTOPMETHODORAMETHODSPECIFIEDBYTHEMANUFACTURERSHALLBEUSEDDIVISIONMIM2,N2,M3N301,02,03,04ALLTABLE4FITTINGCONDITIONSFORTYPEBMAXIMUMALLOWABLECONTROLFORCEOPERATIONREMARKINCLINEORBRAKINGPEDALOPERATIONVEHICLEEFFICIENCYHANDPASSENGERCAR20400500TRUCKS,BUSSES18600700TRAILERS18600CONNECTEDINCLUDESCONDITIONSCONDITIONSFORAPPLYTOPARKINGCONNECTEDBRAKEFORTRACTION12600700PASSENGERCARSVEHICLEALONEANDTRAILERS,TOTALWEIGHT750KGORLESS48INCLINEDTESTTRACKANDOPERATINGFORCEREQUIREMENTSAREASSPECIFIEDINTABLE5TABLE5INCLINEDTESTTRACKANDOPERATINGFORCECONDITIONS2JAS0C4282001PARKINGBRAKEPERFORMANCESPECIFIEDINTABLE5SHALLBEAPPLIEDFORSPRINGBRAKESUNDERNORMALBRAKEVALVEOPERATIONPARKINGBRAKESACTIVATEDBYTWOORMOREOPERATIONSSHALLBETESTEDAFTERTHEBRAKEISOPERATEDTHEACCORDINGTODESIGNSTANDARDS5TESTMETHODS51TESTMETHODSFORINCLINEDTESTTRACKSATHETESTSHALLBEPERFORMEDONBOTHUPWARDANDDOWNWARDINCLINESBTHETESTVEHICLESHALLBEDRIVENONATESTTRACKWITHTHEINCLINESPECIFIEDINTABLE5,THEGEARSHIFTEDCTHESTOPCONDITIONSHALLBECONFIRMED,THEPARKINGBRAKEAPPLIEDWITHTHEFORCESPECIFIEDINTABLE5,ANDTHEMAINBRAKERELEASEDTHEOPERATINGFORCEOFTHEPARKINGBRAKESHALLRELEASEDANDTHESTOPCONDITIONSHALLBECONFIRMEDTHETRAILERPARKINGBRAKEISNOTINTERLOCKEDWITHTHETRACTIONVEHICLE,THESTOPCONDITIONSHALLBECONFIRMEDINASIMILARMANNERAFTERTHETRAILERPARKINGBRAKEISACTIVATEDASSPECIFIEDHOWEVER,FORVEHICLESCONNECTEDTOATRACTORORPASSENGERCAR,ANDTRAILERSOF750KGORLESS,ONLYTHETRACTIONVEHICLEPARKINGBRAKESHALLBEAPPLIEDREQUIREMENTSAREASSPECIFIEDBELOWTOTHENEUTRALPOSITION,ANDTHEVEHICLEBROUGHTTOAFULLSTOPBYAPPLYINGTHEMAINBRAKEFORCONNECTEDVEHICLES,THETESTSHALLBEPERFORMEDUNDERTHEAPPLICABLECONDITIONSINCASESWHEREDINTHEEVENTTHESTOPPEDCONDITIONCANNOTBEMAINTAINED,THESPECIFIEDOPERATINGFORCEMAYBEAPPLIEDAMAXIMUMOFTWOTIMESWITHOUTLOOSENINGTHERATCHETAFTERTHEVEHICLEISSTOPPEDBYTHEMAINBRAKEEFORSPRINGBRAKES,THEOPERATIONSTATEDINBSHALLBEPERFORMEDFIRSTTHEMAINBRAKESHALLBERELEASEDBYACTIVATINGTHEOPERATIONVALVEANDTHESTOPPEDCONDITIONSHALLBECONFIRMEDWHENTHEINCLINEDTESTTRACKINTABLE5ISNOTAVAILABLE,THETESTMAYBEPERFORMEDAFTERTHEMASSOFTHETESTVEHICLEISADJUSTEDACCORDINGTOTHEFOLLOWINGEQUATIONWXSINTANLBW,SIIITANB,WHERE,W,TOTALTESTVEHICLEWEIGHTAFTERADJUSTMENTKGTESTVEHICLENOMINALWEIGHTKGANGLEOFINCLINEDTRACKUSEDFORTEST/IO0ANGLEOFINCLINEDTRACKSPECIFIEDBYDIVISION/IO0WB,B52BRAKINGCAPABILITYTESTMETHODATHEVEHICLESHALLBESETONAROLLERDRIVEBRAKETESTAPPARATUSHEREAFTERREFERREDTOASTHETESTERREQUIREMENTSAREASSPECIFIEDBELOWANDTHEROLLERSSHALLBEROTATEDINTHEFORWARDDIRECTIONTHEVALUEOFTHEBRAKINGFORCEWITHOUTAPPLYINGTHEOPERATINGFORCEOFTHEPARKINGBRAKESHALLBEREADANDUSEDASTHEINITIALVALUEBTHEOPERATINGFORCEOFTHEPARKINGBRAKESHALLBEGRADUALLYINCREASED,ANDTHETESTERSHALLBEAPPLIEDTOMEASURETHEBRAKINGFORCEATEACHINCREASETHETESTSHALLBECONTINUEDUNTILWHEELLOCKISATTAINEDORTHEOPERATINGFORCEREACHESTHELEVELSPECIFIEDINTABLE5BRAKINGEFFICIENCYSHALLBECALCULATEDASSPECIFIEDINITEM61LC,ANDAVALUEGREATERTHANTHATSPECIFIEDINTABLE5SHALLBECONFIRMEDBRAKINGFORCEFORSPRINGBRAKESSHALLBEMEASUREDBYMANIPULATINGTHEOPERATIONVALVEWHILETHEROLLERSAREROTATED,ANDBRAKINGEFFICIENCYSHALLBECALCULATEDASSPECIFIEDINITEM61ICTESTSATHROUGHDSHALLBEPERFORMEDWITHTHEROLLERSROTATEDINTHEREVERSEDIRECTION53TRACTIONFORCETESTMETHODOPTIONALATHEPARKINGBRAKEOFTHETESTVEHICLESHALLBEAPPLIEDATTHEOPERATINGFORCESPECIFIEDINTABLE5,BTHETRACTIONFORCESHALLBEMEASUREDATTHEPOINTIMMEDIATELYBEFORETHEWHEELBEGINSTOROTATEREQUIREMENTSAREASSPECIFIEDBELOWANDTHETESTVEHICLESHALLBETOWEDBYTHETRACTIONDEVICE3JAS0C4282001ITEMINITIALBRAKESPEEDKMLHGEARPOSITIONATBRAKINGPREBRAKINGBRAKETEMPERATUREOPERATINGFORCEBRAKINGREPETITIONSGUIDANCEFORTESTOCCITEMSAANDBSHALLTHENBEPERFORMEDINTHEREVERSEDIRECTIONTHEPARKINGBRAKEMAYBEAPPLIEDAFTERAPPLICATIONOFTHEMAINBRAKEASSPECIFIEDFORTHEINCLINEDTESTTRACKTESTINTHEEVENTTHEWHEELBEGINSTOSLIDEWITHOUTTURNINGDURINGTHETRACTIONFORCEMEASUREMENT,THEMAXIMUMBRAKINGFORCEOFTHEBRAKEDEVICECONCERNEDMAYBEMEASUREDBYINCREASINGTHEFRICTIONCOEFFICIENTOFTHETESTTRACKOROFTHETESTVEHICLEMASSSINCETHERESULTSOBTAINEDBYTHISTESTINCLUDEROLLINGRESISTANCE,THEFOLLOWINGTESTSMAYBEPERFORMEDANDTHEROLLINGRESISTANCEMAYBESUBTRACTEDFROMTHERESULTSOBTAINEDBYITEM53DTHETESTVEHICLESHALLBETOWEDWITHOUTAPPLYINGTHEOPERATINGFORCEOFTHETESTVEHICLEPARKINGBRAKEETHETRACTIONFORCESHALLBEMEASUREDATTHEPOINTIMMEDIATELYBEFORETHEWHEELBEGINSTOROTATEFITEMSDANDESHALLBEPERFORMEDINREVERSEDIRECTION54DYNAMICEFFECTIVENESSTESTREQUIREMENTSAREASSPECIFIEDINTABLE6GUIDANCEORCONDITIONS5300OMAXIMUMSPEEDSVMAXOF30KMLHORLESSSHALLBEVMAXDURINGBRAKING,THECONNECTIONBETWEENTHEENGINEANDTHEDRIVESHAFTSHALLBEDISCONNECTEDBYSHIFTINGTHEGEARTONEUTRALORBYENGAGINGTHECLUTCHPEDAL100ORLESSASSPECIFIEDINTABLE5NOSPECIFICATIONSOPERATINGFORCEORSPRINGCHAMBERPRESSURESHALLBEINCREASEDFROMTHELOWERTOTHEUPPERLIMITS,ANDMEASUREDATTHREEORMOREPOINTSDECELERATIONSHALLBEMEASUREDSTOPPINGDISTANCEMAYBEMEASUREDFORREFERENCEKMLH5TABLE6GUIDANCEFORDVNAMICEFFECTIVENESSTESTSTOPPINGDISTANCEMDECELERATIONM/SZTOPERATINGFORCEORPRESSINGFORCESPRINGBRAKESSHOULDBEEQUALTOCHAMBERBRAKESOPERATINGFORCEORPRESSINGFORCESPRINGBRAKESSHOULDBEEQUALTOCHAMBERBRAKESREMARKSTRAILERSAREEXCLUDEDSINCETHEYARENOTSELFPROPELLED6RECORDING61GUIDANCEFORRECORDINGFORALLTESTS,ABNORMALBRAKEPERFORMANCEANDPHENOMENASUCHASNOISEANDVIBRATIONSHALLBERECORDEDINDETAIL611INCLINEDTRACKTESTREQUIREMENTSAREASSPECIFIEDINITEMS611THROUGH614RESULTSSHALLBERECORDEDINTHEFORMATOFATTACHEDTABLE1612BRAKINGCAPABILITYTESTREQUIREMENTSAREASSPECIFIEDBELOW4JAS0C4282001ABMEASUREMENTRESULTSSHALLBERECORDEDINTHEFORMATSHOWNINATTACHEDTABLE2OR3RESULTSFORTHEOPERATINGFORCEFORTHEINCLINEDTESTTRACKSHALLBERECORDEDINTHEREMARKSCOLUMNWHENTHEBRAKINGFORCEMAINTAINEDBYOPERATINGFORCEAN,ISRELEASED,ITSHALLBEEXPRESSEDASFOLLOWSANOCFROMTHERESULTSOBTAINEDINITEM52,BRAKINGEFFICIENCYSHALLBECALCULATEDBYTHEFOLLOWINGEQUATIONWHERE,EBRAKINGEFFICIENCYFWFIF1FIF2FIF2TOTALBRAKINGFORCEOFPARKINGBRAKENNOMINALWEIGHTOFTESTVEHICLEKGR/LWHEELSSUMOFTESTDEVICEREADINGSNR/LWHEELSSUMOFINITIALVALUESNLWHEELTESTDEVICEREADINGSNRWHEELTESTDEVICEREADINGSNLWHEELINITIALVALUENRWHEELINITIALVALUENDRESULTSOFATTACHEDTABLE2OR3SHALLBESHOWNINTHEFORMATSHOWNINATTACHEDTABLE1613TRACTIONFORCETESTREQUIREMENTSAREASSPECIFIEDBELOWAMEASUREMENTRESULTSSHALLBERECORDEDINTHEFORMATSHOWNINATTACHEDTABLE4BTHEBRAKINGFORCEREQUIREDFORSTOPPINGONTHEINCLINEDTESTTRACKSHALLBEOBTAINEDBYTHEFOLLOWINGEQUATIONF9XXSINTANLBXTWHERE,FWBFROLLINGRESISTANCENTBRAKINGFORCEREQUIREDFORSTOPPINGONTHEINCLINEDTRACKNNOMINALWEIGHTOFTHETESTVEHICLEKGANGLEOFTHEINCLINEDTRACKSPECIFIEDBYCATEGORY/IO0TOTALPARKINGBRAKEBRAKINGFORCEWITHTHEOPERATINGFORCEORTHETRACTIONFORCEAPPLIEDBYTHETRACTIONDEVICENCBRAKINGEFFICIENCYSHALLBEOBTAINEDBYTHEFOLLOWINGEQUATIONTEIP2B98XWWHERE,EBRAKINGEFFICIENCYTPWBTOTALPARKINGBRAKEBRAKINGFORCEWITHTHEOPERATINGFORCEORTHETRACTIONFORCEAPPLIEDBYTHETRACTIONDEVICENNOMINALWEIGHTOFTHETESTVEHICLEKGANGLEOFTHEINCLINEDTRACKSPECIFIEDBYCATEGORY/IO0BTHEBRAKINGFORCEREQUIREDFORSTOPPINGONTHEINCLINEDTESTTRACKSHALLBEOBTAINEDBYTHEFOLLOWING614DYNAMICEFFECTIVENESSTESTAMEASUREMENTRESULTSSHALLBERECORDEDINTHEFORMATSHOWNINATTACHEDTABLE5BDECELERATIONSHALLBEOBTAINEDBYEITHEROFTHEFOLLOWINGTHREEMETHODSANDTHEMETHODUSEDSHALLBERECORDEDEQUATIONREQUIREMENTSAREASSPECIFIEDBELOW5JAS0C42820011AVERAGESATURATEDDECELERATIONMFDDD,ANDDECELE
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