1、SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirelyvoluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefro
2、m, is the sole responsibility of the user.”SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions.TO PLACE A DOCUMENT ORDER; +01 724-776-4970 FAX: +01 724-776-0790SAE WEB ADDRESS http:/w
3、ww.sae.orgCopyright 2001 Society of Automotive Engineers, Inc.All rights reserved. Printed in U.S.A.SURFACEVEHICLE400 Commonwealth Drive, Warrendale, PA 15096-0001RECOMMENDEDPRACTICEAn American National StandardJ1561REV.FEB2001Issued 1988-10Revised 2001-02Superseding J1561 FEB1993(R) Laboratory Spee
4、d Test Procedure for Passenger Car TiresForewordThis document has also changed to comply with the new SAE Technical Standards Board format.Definitions changed to Section 3. All other section numbers have changed accordingly.Having a standardized method of evaluating the speed capability of tires is
5、useful in selecting appropriate tires formotor vehicles. This SAE Recommended Practice provides a laboratory method for determining the speedcapability of passenger car tires under controlled conditions. The procedure is intended to provide a way of testingtires and gathering data on a uniform basis
6、.1. ScopeThis SAE Recommended Practice provides a method for testing the speed performance ofpassenger car tires under controlled conditions in the laboratory on a test wheel. This procedure applies to“standard load,” “extra load,” and “T-type high-pressure temporary-use spare” passenger tires.2. Re
7、ferencesThere are no referenced publications specified herein.3. Definitions3.1 Ambient TemperatureThis is the temperature of the air measured during a high-speed test at a fixedlocation near the tire. The fixed location of ambient temperature measurement is defined as a point on therotational axis
8、of the tire, 0.31 m (12 in) from the plane touching the nearest tire sidewall (or at a point wherean equivalent temperature exists).3.2 Bead SeparationA breakdown of the bond between components in the bead area.3.3 Capped Inflation PressureThe process of inflating the tire to a specified pressure an
9、d allowing the inflationpressure to build up, as the tire temperature increases during the test procedure.3.4 ChunkingThe breaking away of pieces of the tread or sidewall.3.5 Cord SeparationThe parting of cords from adjacent rubber compounds.3.6 CrackingThe parting within the tread, sidewall, or inn
10、erliner of the tire extending to cord material.3.7 Innerliner SeparationThe parting of the innerliner from cord material in the carcass.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-SAE J1561 Revised
11、 FEB2001-2-3.8 Maximum Application LoadFor tires having a designated speed category of 240 km/h (149 mph), V speedsymbol: = 91% of the maximum load.For tires having a designated speed category above 240 km/h (149 mph), Z speed symbol: =95% of the maximum load - 250 km/h (155 mph) max90% of the maxim
12、um load - 260 km/h (161 mph) max85% of the maximum load - 270 km/h (167 mph) and above3.9 Maximum LoadThe maximum load that is molded on the tire sidewall or, if not molded, shown in thepublication of a recognized tire standardizing body.3.10 Ply SeparationThe parting of rubber compound between adja
13、cent plies.3.11 Service DescriptionA service designation, which is distinct from the size designation, consisting of the loadindex and speed symbol.EXAMPLEP205/60R15 90HP205/60R15 90V3.12 Sidewall SeparationThe parting of the rubber compound from the cord material in the sidewall.3.13 Speed Category
14、A category assigned to a tire denoting the maximum speed for which the use of the tire israted.3.14 Tread SeparationThe pulling away of the tread from the carcass.4. Test Equipment4.1 Test Wheel Specifications4.1.1 DIAMETERThe diameter of the standard test wheel used for the high-speed test is 1.708
15、 m (67.23 in). Anoptional test wheel of 2.0 m (78.74 in) diameter may be used with the alternate operation specified in 6.2.1.4.1.2 WIDTH OF THE T EST SURFACEThis must exceed the tread width of the test tire.4.1.3 OUTER SURFACESmooth steel.4.2 Test RimIt must have a contour and width as specified by
16、 a recognized standardizing body for the tire sizeto be tested.4.3 Control AccuracyOperating conditions must be maintained within the following accuracies:a. Test Load: 1%b. Speed: +2, 0 km/h (+1, 0 mph)4.4 Instrumentation Accuracya. Test Load: 20 N (5 lbf)b. Inflation Pressure: 4 kPa (0.5 psi)c. Te
17、mperature: 0.5 C (1 F)d. Speed: 0.5 km/h (0.3 mph)Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-SAE J1561 Revised FEB2001-3-5. Test Conditions5.1 Load80% of the maximum application load.5.2 Inflation
18、 Pressure (Capped)See Table 1.a. 7 kPa (1 psi)5.3 Ambient Temperature25 C (77 F) through 40 C (104 F)5.4 Camber Angle0 degree 0.3 degree5.5 Slip Angle0 degree 0.3 degreeTABLE 1TEST INFLATION PRESSURES (KPA)SpeedSymbolDesignatedSpeedCategoryDiagonal4PR(B)Diagonal6PR(C)Diagonal8PR(D)Radial andBias Bel
19、tedStandardLoad(normal)Radial andBias BeltedExtra Load(reinforced)Up to andincluding “N”Up to andincluding140 km/h(88 mph)230 270 300 240 280P,Q,R,S 150 km/h(94 mph)through180 km/h(112 mph)260 300 330 260 300T,U,H 190 km/h(118 mph)through210 km/h(130 mph)280 320 350 280 320V 240 km/h(149 mph)300 340
20、 370 300 W 270 km/h(168 mph) 320 360Y 300 km/h(186 mph) 320 360Z Above240 km/h(149 mph) 300 NOTE 1 For T-Type high-pressure temporary-use spares, identified by the prefix T in the size designation, the test inflation is 420 kPa.NOTE 2 For tires that do not have a speed category, the test inflation i
21、s the same as tires marked with a “P” speed symbol (150km/h speed category).Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-SAE J1561 Revised FEB2001-4-6. Test Procedure6.1 Thermal ConditioningConditio
22、n the tire/wheel assembly at test room temperature for not less than 3 h.Readjust the inflation pressure to that specified in 5.2.6.2 Operation (1.708 m Diameter Standard Test Wheel)The tire and wheel assembly shall be mounted on thetest axle and pressed normal to the outer face of the test wheel wi
23、th the test load. Carry the test throughwithout interruption, as follows:a. Time taken to pass from zero speed to the initial test speed 10 minb. Initial test speed is the speed category of the tire less 40 km/h (24 mph). For tires which do not have aspeed category, the initial test speed shall be 1
24、10 km/h (68 mph).c. Duration at initial test speed 10 mind. Successive speed increments 10 km/h (6 mph)e. Duration at each speed step 10 minf. Duration at the speed category step 10 min6.2.1 ALTERNATE OPERATION (2.0 m DIAMETER OPTIONAL T EST WHEEL)This operation is the same as 6.2 except:a. Initial
25、test speed is the speed category of the tire less 30 km/h (18 mph). For tires which do not have aspeed category, the initial test speed shall be 120 km/h (75 mph).b. Duration at the speed category step 20 min6.3 Test RecordsThe following information should be recorded for each tire:6.3.1 TIRE IDENTI
26、FICATIONa. Manufacturerb. Brand or trade namec. Tire size designationd. Tire maximum loade. Service description (if the tire has a service description designation)f. Speed category (if the tire has a speed category designation)g. Tire maximum pressureh. Serial number (identification number)i. Other
27、pertinent information6.3.2 TEST WHEEL IDENTIFICATIONa. Test wheel diameterb. Other pertinent information6.3.3 TEST CONDITIONSa. Date and timeb. Rim diameter, width, and contourc. Test loadd. Test inflatione. Ambient temperaturef. Other pertinent informationCopyright SAE International Provided by IHS
28、 under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-SAE J1561 Revised FEB2001-5-6.3.4 TEST DATAa. Initial test speedb. Subsequent completed speed stepsSpeed and Durationc. Duration and speed of final stepd. Tire removal condition after final step7.
29、 Termination of Test and Data Evaluation7.1 The test may be considered terminated by one of the following:a. Completion of predetermined final stepb. Tire failure7.2 Upon visual inspection of the dismounted tire, any visible evidence of the following constitutes tire failure:a. Tread separationb. Co
30、rd separationc. Ply separationd. Bead separatione. Sidewall separationf. Chunkingg. Innerliner separationh. Cracking8. Notes8.1 Marginal IndiciaThe change bar (l) located in the left margin is for the convenience of the user in locatingareas where technical revisions have been made to the previous i
31、ssue of the report. An (R) symbol to the leftof the document title indicates a complete revision of the report.PREPARED BY THE SAE HIGHWAY TIRE FORUM COMMITTEECopyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from
32、IHS-,-SAE J1561 Revised FEB2001RationaleThe changes to this document include:W and Y Speed Symbols were added to Table 1.Also the document was changed to comply with the new SAE Technical Standards Board format.Definitions changed to Section 3. All other section numbers have changed accordingly.Rela
33、tionship of SAE Standard to ISO StandardUnder development by ISO.ApplicationThis SAE Recommended Practice provides a method for testing the speed performance ofpassenger car tires under controlled conditions in the laboratory on a test wheel. This procedure appliesto “standard load,” “extra load,” a
34、nd “T-type high pressure temporary-use spare” passenger tires.Reference SectionThere are no referenced publications specified herein.Developed by the SAE Highway Tire Forum CommitteeCopyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-
