fmvss 571.124 加速器控制系统 accelerator control systems

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1、§571.12449CFRCh.V(10–1–06Edition)§571.124StandardNo.124;Accel-condition,andatanyambienttem-eratorcontrolsystems.peraturebetween¥40degreesCelsiusS1.Scope.Thisstandardestablishesand+52degreesCelsiusafter12hoursrequirementsforthereturnofavehi-ofconditioningatanytemperatureclesthrottletothei

2、dlepositionwhenwithinthatrange.thedriverremovestheactuatingforceS5.1Thereshallbeatleasttwofromtheacceleratorcontrol,orinthesourcesofenergycapableofreturningeventofaseveranceordisconnectionthethrottletotheidlepositionwithinintheacceleratorcontrolsystem.thetimelimitspecifiedbyS5.3fromS2.Pu

3、rpose.Thepurposeofthisanyacceleratorpositionorspeedwhen-standardistoreducedeathsandinju-everthedriverremovestheopposingriesresultingfromengineoverspeedactuatingforce.Intheeventoffailurecausedbymalfunctionsintheaccel-ofonesourceofenergybyasinglesev-eratorcontrolsystem.eranceordisconnectio

4、n,thethrottleS3.Application.Thisstandardappliesshallreturntotheidlepositionwithintopassengercars,multi-purposepas-thetimelimitsspecifiedbyS5.3,fromsengervehicles,trucks,andbuses.anyacceleratorpositionorspeedwhen-S4.Definitions.S4.1Driver-operatedacceleratorcon-everthedriverremovestheoppo

5、singtrolsystemmeansallvehiclecompo-actuatingforce.nents,exceptthefuelmeteringdevice,S5.2Thethrottleshallreturntothethatregulateenginespeedindirectre-idlepositionfromanyacceleratorposi-sponsetomovementofthedriver-oper-tionoranyspeedofwhichtheengineisatedcontrolandthatreturnthethrot-capabl

6、ewheneveranyonecomponenttletotheidlepositionuponreleaseofoftheacceleratorcontrolsystemistheactuatingforce.disconnectedorseveredatasingleFuelmeteringdevicemeansthecarbu-point.Thereturntoidleshalloccurretor,orinthecaseofcertainengineswithinthetimelimitspecifiedbyS5.3,thefuelinjector,fueldi

7、stributorormeasuredeitherfromthetimeofsev-fuelinjectionpump.eranceordisconnectionorfromtheThrottlemeansthecomponentofthefirstremovaloftheopposingactuatingfuelmeteringdevicethatconnectstoforcebythedriver.thedriver-operatedacceleratorcontrolS5.3Exceptasprovidedbelow,max-sys