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1、NorthAmericanENGINEERINGTestProcedureGMN9968TPSTANDARDSTrailerTowingDurability–DesertProvingGround1Introduction2.1Normative.2.2GM.1.1Purpose.GMN9747TP,"DurabilityModules-DPG"Evaluatevehicleperformanceandintegritywhenperformingtrailer-towingoperationinthe2.3Additional.environmentofthesouthwest
2、ernUnitedStates.1.2Foreword.3Resources3.1Facilities.1.2.1TheGMDesertProvingGround,Mesa,AZisThis6,180milepublicroadtestconsistsofutilizedasanoperationsbase.Testmoduleapproximately10%citydriving,20%ongreaterdrivingisdoneonpublicroadsinthevicinityofthan5percentgrade,30%oncurvedroads,andtheProvin
3、gGrounds.40%generalhighwaydriving1.2.23.2Equipment.Anumberofreportsareavailablerelatingtocustomerusageanddurabilitytesting.Fora3.2.1Trailerlistofthesereports,informationregardingtheItisrecommendedthatanenclosedutilitytrailerparametersthathavebeenmeasuredonbeusedfor"light"trailerhauling(2,000l
4、borcustomervehicles,ordescriptionsoftheless).Atraveltrailerorstocktrailershouldbecustomervehiclefleets,pleasecontact:usedfor"heavy"trailerhauling(over2,000lb).ProductUsageMeasurementsandNOTE:Alltrailers3,000lbormoreusedinthisApplications,MC483-324-201,GeneralMotorstestmustbeequippedwithtraile
5、rbrakes.ProvingGround,Milford,MI48380-3726.ArizonaStatelawrequiresthefollowingbrakePhone:(248)685-6035.equipment:Whenoperatedonahighwayatrailerorsemi-trailerwithagrossweightof1.3Applicability.3,000lbormoreshallbeequippedwithbrakesThisspecificationisapplicabletopassengerthatareadequatetocontro
6、lthemovementofvehiclesandlightdutytrucksintendedforuseinandtostopandtoholdthevehicleandthatareNorthAmerica.designedtoeitherbeappliedbythedriverofthetowingmotorvehiclefromitscaborbeofatype1.4Definitions.thatoperatesautomaticallywhentheservicebrakesofthetowingmotorvehicleareapplied.RefertoGMN97
7、47TP,"DurabilityModules-ThebrakesshallbedesignedandconnectedsoDPG"fordefinitionsoftermsusedinthegeneralthatincaseofanaccidentalbreakawayofthedrivinginstructions.towedvehicle,thebrakesshallbeautomaticallyapplied.2ReferencesNote:Onlythelatestap
