GMN 3714TP-2001 TitleSuspension - Vertical Stroking - Durability Test

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1、NorthAmericanTestProcedureGMN3714TPENGINEERINGSTANDARDS(Book)Title:Suspension–VerticalStroking–DurabilityTest1Introductionovertestroads(usuallytheR-15-101GMUTSdurabilitytestroadsattheMilfordProvingGround).1.1Purpose.1.4.2GMUTS–TestproceduresreferredtoasToeval

2、uatethedurabilityofsuspension“GeneralMotorsUniformTestcomponentswhensubjectedtoverticalSpecifications”.loads/displacementsappliedatthewheelcenterlocation(s).Ifabodyorframeisusedtomount1.4.3ConstantAmplitude–Thistermreferstothesuspensioncomponents(insteadofari

3、gidatestthatrepeatsthesamesimpleloadfixture)thetestmayalsoprovideusefulordisplacementcycleatthesameinformationaboutthedurabilityofthebody/framefrequency.atthesuspensionconnectionsloads/displacementsappliedatthewheelcenter1.4.42g–Twotimestheweightofthevehiclel

4、ocation(s).Ifabodyorframeisusedtomountmeasuredononewheel.thesuspensioncomponents(insteadofarigidfixture)thetestmayalsoprovideuseful1.4.5SuspensionDheight–Thedistanceinformationaboutthedurabilityofthebody/framebetweenapointonthesuspension(nearatthesuspensionco

5、nnections.therearwheel),relativetoapointonthebodyorrearsuspensioncrossmember.1.2Foreword.Themeasurementpointusedvariesbybodystyle.ThemeasurementisusedThistestisusuallyusedwhenroadloaddataistoquantifysuspensionpositionrelativenotavailable.Itcanbeusedtostrokeon

6、esidetothebody.Forexample,therearofthesuspensionortwosidessimultaneously.suspensionDheighton1999WcarsismeasuredfromtheundersideoftheflatRealtimetestingcanberun,ifroadloaddataisportionofthecrossmembertotheavailable.Verticalloadandlowercontrolarmcenterofthetrai

7、lingarm-to-knucklebolt.(LCA)angulardisplacementaretypicallyrequired.1.4.6SuspensionZheight–Thedistancebetweenapointonthesuspension(near1.3Applicability.thefrontwheel),relativetoapointlocatedonthebodyorenginecradle.Thisprocedureisapplicabletolighttrucks,Themea

8、surementpointsusedvarybypassengercars,limousines,taxicabs,andbodystyle.Themeasurementisusedpolicecars.toquantifysuspensionpositionrelativetothebody.Forexample,thefront1.4Definitions.suspe