標準號：SAE J 2505-2010
中文標準名稱：道路車輛摩擦阻力的測量
英文標準名稱：Measurement of Vehicle-Roadway Frictional Drag
標準類型：T04
發布日期：2010/8/5 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：T04
國際標準分類號：43.040.40
引用標準：ASTM E 274-2006;ASTM E 445/E 445M-1988;ASTM E 456-2008;ASTM E 503/E 503M-1988;ASTM F 403-1998;ASTM F 811-2002;SAE J 299-2009;SAE J 2909-2010;SAE TSB 003-1999;940722;940918
適用范圍：This SAE Recommended Practice provides guidelines for procedures and practices used to obtain and record measurements and to analyze and present results of frictional drag tests of a vehicle with its brakes fully applied at a given roadway location. It is for use at accident sites and test sites and is applicable to straight-line stopping of vehicles such as passenger cars, light trucks and vans under fully braked conditions including locked-wheel skids for vehicles with a conventional braking system and for vehicles with full or partial antilock braking systems (ABS). The average deceleration resulting from a given series of tests is intended to be representative of a frictional drag factor for the conditions under which the test was conducted such as the type of vehicle, type and condition of tires, roadway material and roadway surface conditions. The frictional drag factor is intended to conform to use with the stopping distance formula (Fricke, 1990) as stated in Equation 1. Two methods are included: stopping distance method (measurement of the distance required to bring a vehicle to a complete stop from a known initial speed) and average acceleration measurement (using acceleration measuring devices and data analysis to determine the average drag factor). The Recommended Practice applies to vehicles stopping in a fully braked condition. Values of roadway frictional drag obtained by other means do not necessarily agree or correlate (Lock, et at., 1982) with full vehicle testing and are not recommended.