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; (724) 776-4970 FAX: (724) 776-0790SAE WEB ADDRESS http:/www.s
3、ae.orgCopyright 1966 Society of Automotive Engineers, Inc.All rights reserved. Printed in U.S.A.SURFACEVEHICLE400 Commonwealth Drive, Warrendale, PA 15096-0001RECOMMENDEDPRACTICESubmitted for recognition as an American National StandardJ966REV.NOV2000Issued 1966-08Revised 2000-11Superseding J966 AUG
4、1966(R) Test Procedure for Measuring Passenger Car Tire Revolutions Per MileForewordThis Document has changed to comply with the new SAE Technical Standards Board Format. Scope isSection 1. References were added as Section 2. Metric was also added.1. ScopeThis SAE Recommended Practice provides a tes
5、t procedure for determining passenger car tirerevolutions per mile. It is intended to supplement SAE J678.2. References2.1 Applicable PublicationsThe following publications form a part of the specification to the extent specifiedherein. Unless otherwise indicated, the latest revision of SAE publicat
6、ions shall apply.2.1.1 SAE PUBLICATIONAvailable from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001.SAE J678Speedometers and TachometersAutomotive2.1.2 TIRE AND RIM ASSOCIATION PUBLICATIONAvailable from Tire and Rim Association, 175 Montrose WestAvenue, Suite 150, Copley, OH 44321.Tire and R
7、im Association Year Book3. Road ConditionsThe test shall be a two mile, reasonably level straight-away section of dry pavement ofconsistent construction and surface, that is, concrete or blacktop. It should not have intermittent sections ofeach.4. TemperatureAmbient test temperature shall be between
8、 40 and 80 F.5. Vehicle Preparation and Test Load5.1 Tire PositionSince most speedometers are actuated from the driveshaft, the tires to be tested should beinstalled on the drive wheel positions. The tires shall be a matched set of the same brand, having the samedegree of wear.5.2 Test LoadThe load
9、on each tire shall be the 88% maximum load rating for the particular size as given in thecurrent Tire and Rim Association Year Book.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-SAE J966 Revised NOV2
10、000-2-5.3 BreakinPrior to the test, the tires shall be conditioned by running a breakin schedule of 161 km 32 km(100miles 20 miles) at approximately 97 km/h (60 mph).5.4 Test SpeedsTire revolutions shall be counted at 72, 40, and 105 km/h (45, 25, and 65 mph) using a fifthwheel or calibrated vehicle
11、 speedometer for measurement of the test speed.6. Method of TestTires shall be warmed up by a 16 km (10 mile) run on the straight-away at 72 km/h (45 mph).After warmup, adjust the pressure of each tire to 200 kPa (29 psi) and immediately run the 3 km (2 mile) test at72 km/h (45 mph), followed by the
12、 40 km/h (25 mph) and 105 km/h (65 mph) test. In the event of a stoppageor interruption of the test of sufficient duration to permit the tires to cool, the tire warmup and pressureadjustment to 200 kPa (29 psi) shall be repeated before resuming further tire revolution determinations.Count the tire r
13、evolutions required to traverse a distance of 3 km (2 miles) in each direction at a constantspeed. A measured course or calibrated fifth wheel may be used for distance determination. Tire revolutionsper mile count at 72 km/h (45 mph) is derived by averaging the results of four runs (8 miles) which a
14、re within1% of each other. Repeat for 40 km/h (25 mph) and 105 km/h (65 mph).The revolutions per mile of the tested tires shall be determined for each speed, the 72 km/h (45 mph)revolutions being the standard value. Revolutions per mile for 40 and 105 km/h (25 and 65 mph) are recordedto show differe
15、nces due to speed.7. Notes7.1 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 issue of the report. An (R) symbol to the leftof the document title indicates a complete revision o
16、f 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 IHS-,-SAE J966 Revised NOV2000RationaleThis document has been revised to comply with the new SAE T
17、echnical Standards Board format.Scope was changed to Section 1. References were added as Section 2. Metric was added to thedocument.Relationship of SAE Standard to ISO StandardNot applicable.ApplicationThis SAE Recommended Practice provides a test procedure for determining passenger car tirerevoluti
18、ons per mile. It is intended to supplement SAE J678.Reference SectionSAE J678Speedometers and TachometersAutomotiveTire and Rim Association Year BookDeveloped 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-,-
