75SAE-J4002-2010

__________________________________________________________________________________________________________________________________________SAETechnicalStandardsBoardRulesprovidethat:“ThisreportispublishedbySAEtoadvancethestateoftechnicalandengineeringsciences.Theuseofthisreportisentirelyvoluntary,anditsapplicabilityandsuitabilityforanyparticularuse,includinganypatentinfringementarisingtherefrom,isthesoleresponsibilityoftheuser.”SAEreviewseachtechnicalreportatleasteveryfiveyearsatwhichtimeitmaybereaffirmed,revised,orcancelled.SAEinvitesyourwrittencommentsandsuggestions.Copyright©2010SAEInternationalAllrightsreserved.Nopartofthispublicationmaybereproduced,storedinaretrievalsystemortransmitted,inanyformorbyanymeans,electronic,mechanical,photocopying,recording,orotherwise,withoutthepriorwrittenpermissionofSAE.TOPLACEADOCUMENTORDER:Tel:[phone](insideUSAandCanada)Tel:[phone](outsideUSA)Fax:[phone]Email:[e-mail]:://(HPM-II)SpecificationsandProcedureforH-PointDetermination—AuditingVehicleSeatsRATIONALETheproceduresforauditingtheseatareessentiallyunchangedfromthepreviousversionofthisstandard.ThemostsignificantchangeisthattheBallofFoot(BOF)oftheshoedoesnothavetobeonthepedalsurface.TheHPM-IIshoecancontactthepedalatanypoint(s)onthebottomoftheshoe.ThetermPedalReferencePoint(PRP)hasbeendeleted(sincetheBOFmaynotbeonthepedal)andreplacedbyanewtermcalledtheBallofFootReferencePoint(BOFRP).TheAHPtoBOFdistancewaschangedfrom200mmto203mmtobeconsistentwithSAEJ826,J1100:2009,andvehiclemanufacturersaroundtheworld.ThefollowingphysicalmodificationsweremadetoHPM-II.Theflatpartoftheshoebottomwasextendedfrom200to203mm.Anewscalewasaddedtothetopoftheshoetoaidindeterminingthepedalcontactpoint.AnewH-pointdivotwasaddedtoallowCMMpointtakingfromabove.Thekneeanglescalewasrecessedtoimproveitsdurabilityandreorientedtoimproveitsreadability.Severalfigureswererevisedtoillustratethesechanges.ThetermsPedalPlaneandPedalPlaneAngle(PPA)havebeenreplacedbyShoePlaneandShoePlaneAngle(SPA).Thesenewtermsmoreaccuratelyconveythemeaning.SPAisasideviewanglethatisprovidedbythevehiclemanufacturer.TABLEOFCONTENTSINTRODUCTION.....................................................................................................................................................................41.SCOPE..........................................................................................................................................................52.NORMATIVEREFERENCES.......................................................................................................................62.1ApplicablePublications.................................................................................................................................62.1.1SAEPublications...........................................................................................................................................63.DEFINITIONS...............................................................................................................................................63.1H-point...........................................................................................................................................................63.2H-pointTravelPath.......................................................................................................................................63.3SgRP(SeatingReferencePoint),R-point,DesignH-point...........................................................................63.4AHP(AcceleratorHeelPoint)........................................................................................................................73.5BOFRP(BallofFootReferencePoint).........................................................................................................73.6FRP(FloorReferencePoint,RearPassenger)............................................................................................73.7LSP(LumbarSupportProminence)..............................................................................................................73.8SPA(ShoePlaneAngle)...............................................................................................................................7SAEJ4002RevisedJAN2010Page2of574.MEASUREMENTPROCEDUREFORTHETHREE-DIMENSIONALH-POINTMACHINE........................74.1SummaryofInstallationProcedure...............................................................................................................84.1.1MeasuredVersusDesignValues.................................................................................................................84.2PrepareVehicleandSeat..........................................................................................