SAE J 2505-2010 道路车辆摩擦阻力的测量

标准号：SAE J 2505-2010
中文标准名称：道路车辆摩擦阻力的测量
英文标准名称：Measurement of Vehicle-Roadway Frictional Drag
标准类型：T04
发布日期：2010/8/5 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：T04
国际标准分类号：43.040.40
引用标准：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
适用范围：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.