SAE J1270-2000 轿车、轻型载货汽车、公路载货汽车和公共汽车轮胎滚动阻力的测量.pdf

SURFACE REV. VEHICLE J1270 MAR87 INFORMATION Issued 1979-10 400 Commonwealth Drive, Warrendale, PA 15096-0001 REPORT Revised 1987-03 Superseding J1270 NOV85 An American National Standard MEASUREMENT OF PASSENGER CAR, LIGHT TRUCK, AND HIGHWAY TRUCK AND BUS TIRE ROLLING RESISTANCE 1. Scope—This information report is a companion document to SAE Recommended Practice, J1269, Rolling Resistance Measurement Procedure for Passenger Car, Light Truck and Highway Truck and Bus Tires. It provides background information and explanations related to the use of the Measurement Procedure and follows the same format as SAE J1269. 1.1 Basic Methods—The force, torque, and power methods of measurement are all in common use and should yield the same test results. Effects of steering, traction, surface texture, and non-steady-state tire operations are excluded from the recommended practice because they are still in the research stage. 1.1.1 FOR