FMVSS1192021GVWR超过4536公斤10000磅的机动车和摩托车的新充气轮胎

Nat’lHighwayTrafficSafetyAdmin.,DOT

§571.119

§571.119

49CFRCh.V(10–1–21Edition)

PAGE

563

PAGE

564

[56FR15294,Apr.16,1991,asamendedat57

FR23963,June5,1992;57FR28012,June23,

1992;58FR16785,Mar.31,1993;60FR13644,

Mar.14,1995;69FR55531,55544,Sept.15,2004;

71FR18683,Apr.12,2006;71FR25285,Apr.28,

2006;73FR38339,July7,2008]

§571.119StandardNo.119;Newpneu-matictiresformotorvehicleswithaGVWRofmorethan4,536kilo-grams(10,000pounds),specialtytires,andtiresformotorcycles.

S1.Scope.Thisstandardestablishesperformanceandmarkingrequire-mentsfortiresforuseonmotorvehi-cleswithaGVWRofmorethan4,536kilograms(10,000pounds),specialtytires,andtiresformotorcycles.

S2.Purpose.ThepurposeofthisstandardistoprovidesafeoperationalperformancelevelsfortiresusedonmotorvehicleswithaGVWRofmorethan10,000pounds,trailers,andmotor-cycles,andtoplacesufficientinforma-tiononthetirestopermittheirproperselectionanduse.

S3.Application.Thisstandardappliesto:

NewpneumatictiresforuseonmotorvehicleswithaGVWRofmorethan4,536kilograms(10,000pounds)

manufacturedafter1948;

Newpneumaticlighttrucktireswithatreaddepthof18⁄32inchorgreat-er,foruseonmotorvehicleswithaGVWRof4,536kilograms(10,000pounds)orlessmanufacturedafter1948;

Tiresforuseonspecial-usetrail-ers(ST,FIand8–12rimorlowerdi-ametercode);and

Tiresforuseonmotorcyclesman-ufacturedafter1948.

S4.Definitions.AlltermsdefinedintheActandtherulesandstandardsissuedunderitsauthorityareusedasdefinedtherein.

Lighttrucktiremeansatiredes-ignatedbyitsmanuafactureraspri-marilyintendedforuseonlightweighttrucksormultipurposepassengervehi-cles.

Modelrimassemblymeansatestde-vicethat(a)includesarimwhichcon-formstothepublisheddimensionsofacommerciallyavailablerim,(b)in-cludesanairvalveassemblywhenusedfortestingtubelesstiresoraninnertubeandflap(asrequired)whenusedfortestingtubetypetires,and(c)

undergoesnopermanentrimdeforma-tionandallowsnolossofairthroughtheportionthatitcomprisesofthetire-rimpressurechamberwhenatireisproperlymountedontheassemblyandsubjectedtotherequirementsofthisstandard.

S5.Tireandrimmatchinginformation.S5.1Eachmanufactureroftiresshallensurethatalistingoftherimsthatmaybeusedwitheachtirethatheproducesisprovidedtothepublic.Forpurposesofthissectioneachrimlistingshallincludedimensionalspeci-ficationsandadiagramoftherim.Howeveralistingcompiledinaccord-ancewithparagraph(a)ofthissectionneednotincludedimensionalspecifica-tionsoradiagramofarimiftherim’sdimensionalspecificationsanddiagramarecontainedineachlistingpublishedinaccordancewithparagraph(b)ofthisstandard.Thelistingshallbein

oneofthefollowingforms:

Listedbymanufacturernameorbrandnameinadocumentfurnishedtodealersofthemanufacturer’stires,toanypersonuponrequest,andindupli-cateto:DocketSection,NationalHighwayTrafficSafetyAdministra-tion,400SeventhStreetSW.,Wash-ington,DC20590;or

Containedinpublications,currentatthedateofmanufactureofthetireoranylaterdate,ofatleastoneofthefollowingorganizations:

TheTireandRimAssociation

TheEuropeanTyreandRimTechnicalOrganisation

JapanAutomobileTireManufacturers’Asso-ciation,Inc.

DeutscheIndustrieNormBritishStandardsInstitution

ScandinavianTireandRimOrganizationTheTyreandRimAssociationofAustralia

S5.2Informationcontainedinapub-licationspecifiedinS5.1(b)whichlistsgeneralcategoriesoftiresandrimsbysizedesignation,typeofconstruction,and/orintendeduse,shallbeconsideredtobemanufacturer’sinformationpur-suanttoS5.1forthelistedtires,unlessthepublicationitselforspecificinfor-mationprovidedaccordingtoS5.1(a)indicatesotherwise.

S6.Requirements.Eachtireshallbecapableofmeetinganyoftheapplica-blerequirementssetforthbelow,when

mountedonamodelrimassemblycor-respondingtoanyrimdesignatedbythetiremanufacturerforusewiththetireinaccordancewithS5.However,aparticulartireneednotmeetfurtherrequirementsafterhavingbeensub-jectedtoandmettheendurancetest(S6.1),strengthtest(S6.2),orhighspeedperformancetest(S6.3).

S6.1Endurance.

S6.1.1PriortotestinginaccordancewiththeproceduresofS7.2,atireshallexhibitnovisualevidenceoftread,sidewall,ply,cord,innerliner,orbeadseparation,chunking,brokencords,cracking,oropensplices.

S6.1.2WhentestedinaccordancewiththeproceduresofS7.2:

Thereshallbenovisualevidenceoftread,sidewall,ply,cord,innerliner,orbeadseparation,chunking,brokencords,cracking,oropensplices.

ThetirepressureattheendofthetestshallbenotlessthantheinitialpressurespecifiedinS7.2(a).

S6.2Strength.Whentestedinac-cordancewiththeproceduresofS7.3atire’saveragebreakingenergyvalueshallbenotlessthanthevaluespeci-fiedinTableIIforthattire’ssizeandloadrange.

S6.3Highspeedperformance.Whentestedinaccordancewiththeproce-duresofS7.4,atireshallmeetthere-quirementssetforthinS6.1.1andS6.1.2(a)and(b).However,thisrequire-mentappliesonlytomotorcycletiresandtonon-speed-restrictedtiresofnominalrimdiametercode14.5orlessmarkedloadrangeA,B,C,orD.

S6.4Treadwearindicators.Exceptasspecifiedinthisparagraph,eachtireshallhaveatleastsixtreadwearindi-catorsspacedapproximatelyequallyaroundthecircumferenceofthetirethatenableapersoninspectingthetiretodeterminevisuallywhetherthetirehasworntoatreaddepthof1.6mm(one-sixteenthofaninch).Tireswitharimdiametercodeof12orsmallershallhaveatleastthreesuchtreadwearindicators.Motorcycletiresshallhaveatleastthreesuchindica-torswhichpermitvisualdeterminationthatthetirehasworntoatreaddepthof0.8mm(one-thirty-secondofaninch).

S6.5Tiremarkings.Exceptasspeci-

fiedinthisparagraph,eachtireshall

bemarkedoneachsidewallwiththeinformationspecifiedinparagraphs(a)through(j)ofthissection.Themark-ingsshallbeplacedbetweenthemax-imumsectionwidth(exclusiveofside-walldecorationsorcurbribs)andthebeadonatleastonesidewall,unlessthemaximumsectionwidthofthetireislocatedinanareawhichisnotmorethanone-fourthofthedistancefromthebeadtotheshoulderofthetire.Ifthemaximumsectionwidthfallswith-inthatarea,themarkingsshallappearbetweenthebeadandapointone-halfthedistancefromthebeadtotheshoulderofthetire,onatleastonesidewall.Themarkingsshallbeinlet-tersandnumeralsnotlessthan2mm(0.078inch)highandraisedaboveorsunkbelowthetiresurfacenotlessthat0.4mm(0.015inch),exceptthatthemarkingdepthshallbenotlessthan0.25mm(0.010inch)inthecaseofmotorcycletires.Thetireidentifica-tionandtheDOTsymbollabelingshallcomplywithpart574ofthischapter.Markingsmayappearononlyoneside-wallandtheentiresidewallareamaybeusedinthecaseofmotorcycletiresandrecreational,boat,baggage,andspecialtrailertires.

ThesymbolDOT,whichshallcon-

stituteacertificationthatthetireconformstoapplicableFederalmotorvehiclesafetystandards.Thissymbolmaybemarkedononlyonesidewall.

Thetireidentificationnumberre-quiredbypart574ofthischapter.Thisnumbermaybemarkedononlyonesidewall.

Thetiresizedesignationaslistedinthedocumentsandpublicationsdes-ignatedinS5.1.

Themaximumloadratingandcorrespondinginflationpressureofthetire,shownasfollows:

(Markontiresratedforsingleanddualload):Maxloadsinglellkg(lllb)atllkPa(llpsi)cold.Maxloaddualllkg(lllb)atllkPa(llpsi)cold.

(Markontiresratedonlyforsingleload):Maxloadllkg(lllb)atllkPa(llpsi)cold.

Thespeedrestrictionofthetire,if90km/h(55mph)orless,shownasfollows:

Maxspeedllkm/h(llmph).

Theactualnumberofpliesandthecompositionoftheplycordmaterialin

thesidewalland,ifdifferent,inthetreadarea;

Thewords‘‘tubeless’’or‘‘tubetype’’asapplicable.

Theword‘‘regroovable’’ifthetireisdesignedforregrooving.

Theword‘‘radial’’ifaradialtire.

Theletterdesignatingthetireloadrange.

S6.6Maximumloadrating.IfthemaximumloadratingforaparticulartiresizeisshowninoneormoreofthepublicationsdescribedinS5.1(b),eachtireofthatsizedesignationshallhaveamaximumloadratingthatisnotlessthanthepublishedmaximumloadrat-ing,oriftherearedifferingpublishedratingsforthesametiresizedesigna-tion,notlessthanthelowestpublishedmaximumloadratingforthesizedes-ignation.

S7.Testprocedures.

S7.1Generalconditions.

S7.1.1Thetestsareperformedusinganappropriatenewtube,tubevalveandflapassembly(asrequired)thatal-lowsnolossofairfortestingoftube-typetiresunderS7.2,S7.3,andS7.4,andtubelesstiresunderS7.3.

S7.1.2ThetiremustbecapableofmeetingtherequirementsofS7.2andS7.4whenconditionedtoatemperatureof35C(95F)for3hoursbeforethetestisconducted,andwithanambienttemperaturemaintainedat35C(95F)duringallphasesoftesting.Thetiremustbecapableofmeetingthere-quirementsofS7.3whenconditionedatatemperatureof21C(70F)for3hoursbeforethetestisconducted.

S7.2Endurance.(a)Mountthetireonamodelrimassemblyandinflateittotheinflationpressurecorrespondingtothemaximumloadratingmarkedonthetire.Useasinglemaximumloadvaluewhenthetireismarkedwithbothsingleanddualmaximumload.

Afterconditioningthetire-rimassemblyinaccordancewithS7.1.2,ad-justthetirepressuretothatspecifiedin(a)immediatelybeforemountingthetirerimassembly.

Mountthetire-rimassemblyonanaxleandpressitagainstaflat-facedsteeltestwheelthatis1708mm(67.23inches)indiameterandatleastaswideasthetreadofthetire.

ApplythetestloadandrotatethetestwheelasindicatedinTableIIIfor

thetypeoftiretestedconductingeachsuccessivephaseofthetestwithoutinterruption.

Immediatelyafterrunningthetiretherequiredtime,measurethetireinflationpressure.Removethetirefromthemodelrimassembly,andin-spectthetire.

S7.3Strength.(a)Mountthetireonamodelrimassemblyandinflateittothepressurecorrespondingtothemax-imumload,ormaximumdualloadwherethereisbothasingleanddualloadmarkedonthetire.Ifthetireistubeless,atubemaybeinsertedtopre-ventlossofairduringthetestintheeventofpuncture.

Afterconditioningthetire-rimassemblyinaccordancewithS7.1.2,ad-justthetirepressuretothatspecifiedin(a).

Forceacylindricalsteelplunger,withahemisphericalendandofthedi-ameterspecifiedinTableIforthetiresize,perpendicularlyintoaraisedtreadelementasnearaspossibletothecenterlineofthetread,atarateof50mm(2inches)perminute,untilthetirebreaksortheplungerisstoppedbytherim.

Recordtheforceandthedistanceofpenetrationjustbeforethetirebreaks,orifitfailstobreak,justbe-foretheplungerisstoppedbytherim.

Repeattheplungerapplicationat72intervalsaroundthecircumferenceofthetire,untilfivemeasurementsaremade.However,inthecaseoftiresof

12inchrimdiametercodeorsmaller,repeattheplungerapplicationat120intervalsaroundthecircumferenceofthetire,untilthreemeasurementsaremade.

Computethebreakingenergyforeachtestpointbyoneofthetwofol-lowingformulas:

W=[(FP)/2]10¥3

Where:

W=Breakingenergyinjoules(J),F=Forceinnewtons(N),and

P=Penetrationinmillimeters(mm),

or;

W=(FP)/2

Where:

W=Breakingenergyininch-pounds(in-lb),F=Forceinpounds(lb),and

P=Penetrationininches(in).

Determinetheaveragebreakingenergyvalueforthetirebycomputingtheaverageofthevaluesobtainedinaccordancewithparagraph(f).

S7.4Highspeedperformance.(a)Per-formsteps(a)through(c)ofS7.2.

Applyaforceof88percentofthemaximumloadratingmarkedonthetire(usesinglemaximumloadvaluewhenthetireismarkedwithbothsin-gleanddualmaximumloads),andro-tatethetestwheelat250rpmfor2hours.

Removetheload,allowthetiretocoolto35C(95F),andthenadjust

thepressuretothatmarkedonthetireforsingletireuse.

Reapplythesameload,andwith-outinterruptionorreadjustmentofin-flationpressure,rotatethetestwheelat375rpmfor30minutes,thenat400rpmfor30minutes,andthenat425rpmfor30minutes.

Immediatelyafterrunningthetiretherequiredtime,measurethetireinflationpressure.Removethetirefromthemodelrimassembly,andin-spectthetire.

TableI—StrengthTestPlungerDiameter

Tiretype

Plungerdiameter

(mm)

(inches)

Lighttruck

19.05

3⁄4

Motorcycle

7.94

5⁄16

12rimdiametercode(exceptmotorcycle)

19.05

3⁄4

Tubeless:

17.5rimdiametercode

19.05

3⁄4

>17.5rimdiametercode,loadrangeForless

31.75

11⁄4

>17.5rimdiametercode,loadrangeoverF

38.10

11⁄2

Tube-type:

LoadrangeForless

31.75

11⁄4

LoadrangeoverF

38.10

11⁄2

§571.119

567

Nat’lHighwayTrafficSafetyAdmin.,DOT

TableII—MinimumStaticBreakingEnergy

[Joules(J)andInch-Pounds(in-lb)]

Tirecharacteristic

Motorcycle

All12rim

LightTruck

Tiresotherthanlighttruck,motorcycle,12rimdiametercodeorsmaller

diametercodeor

greaterthan12

5⁄16

Plungerdiameter(mmandinches)

7.94

mm

smallerexceptmotorcycle

rimdiametercode

Tubetypegreaterthan12rimdiametercode

Tubeless17.5rimdiametercodeorsmaller

Tubelessgreaterthan17.5rimdiametercode

19.05

3⁄4

19.05

3⁄4

11⁄4

11⁄2

3⁄4

11⁄4

11⁄2

BreakingEnergy

J

in-lb

31.75

mm

38.10

mm

19.05

mm

31.75

mm

38.10

mm

mm

mm

J

in-lb

J

in-lb

J

in-lb

J

in-lb

J

in-lb

J

in-lb

J

in-lb

LoadRange:

A

16

150

67

600

225

2,000

225

2,000

B

33

300

135

1,200

293

2,600

293

2,600

C

45

400

203

1,800

361

3,200

768

6,800

361

3,200

576

5,100

D

271

2,400

514

4,550

892

7,900

514

4,550

734

6,500

E

338

3,000

576

5,100

1,412

12,500

576

5,100

971

8,600

F

406

3,600

644

5,700

1,785

15,800

644

5,700

1,412

12,500

G

711

6,300

2,282

20,200

711

6,300

1,694

15,000

H

768

6,800

2,598

23,000

768

6,800

2,090

18,500

J

2,824

25,000

2,203

19,500

L

3,050

27,000

M

3,220

28,500

N

3,389

30,000

Note:Forrayoncordtires,applicableenergyvaluesare60percentofthoseintable.

§571.120

49CFRCh.V(10–1–21Edition)

PAGE

568

TableIII—EnduranceTestSchedule

Description

Loadrange

Testwheelspeed

Testload:Percentofmaximumloadrating

Totaltestrevolution(thousands)

km/h

r/m

StepI(7hours)

StepII(16hours)

StepIII(24hours)

Speed-restricted

service:

90km/h(55

All

40

125

66

84

101

352.5

mph).

80km/h(50

C,D

48

150

75

97

114

423.0

mph).

E,F,G,H,J,L,

32

100

66

84

101

282.0

M,N.

56km/h(35

All

24

75

66

84

101

211.5

mph).

Motorcycle

All

80

250

a100

b108

117

510.0

Allother

A,B,C,D

80

250

a75

b97

114

510.0

E

64

200

70

88

106

564.0

F

64

200

66

84

101

564.0

G

56

175

66

84

101

493.5

H,J,L,M,N

48

150

66

84

101

423.0

a4hoursfortiresizessubjecttohighspeedrequirementsS6.3.

b6hoursfortiresizessubjecttohighspeedrequirementsS6.3.

(Secs.113,201,80Stat.718(15U.S.C.1402,1421);secs.103,112,119,201,203,Pub.L.89–563,80

Stat.718(15U.S.C.1392,1401,1421,1423);delegationofauthorityat49CFR1.50)

[38FR31301,Nov.13,1973]

EDITORIALNOTE:ForFEDERALREGISTERcitationsaffecting§571.119,seetheListofCFRSectionsAffected,whichappearsintheFindingAidssectionoftheprintedvolumeandat

.

§571.120Tireselectionandrimsandmotorhome/recreationvehicletrailerloadcarryingcapacityinfor-mationformotorvehicleswithaGVWRofmorethan4,536kilograms(10