测定汽车滑行阻力系数的方法  

A Method of Determining Coasting Resistance Coefficient

作　　者：韩宗奇[1] 李亮[1] 

机构地区：[1]燕山大学

出　　处：《汽车工程》2002年第4期364-366,共3页Automotive Engineering

基　　金：清华大学汽车安全与节能国家重点实验室资助。

摘　　要：从汽车滑行运动微分方程入手,经过积分推导出滚动阻力系数和空气阻力系数与滑行初速度、滑行总时间和滑行总距离之间的关系,用滑行过程中3个瞬时点的记录参数组成方程组,再用MATLAB求方程组的数值解,即可求出汽车的滚动阻力系数和空气阻力系数。本方法只需一次滑行试验,既方便易行,又比较准确。In this paper the author starts with the differential equation of an automobile in coasting and rives the relation between the rolling resistance coefficient,the air resistance coefficient and initial velocity .coasting time and distance.3 equations are established with 3 sets of recorded data corresponding to 3 time -points.The rolling resistance coefficient and the air resistance coefficient are obtained by solving the equations with MATLAB.Only one go of coasting test is required for determining the coefficients in this method.which is convenient in use with accurate result.

关 键 词：汽车 滑行阻力系数 滚动阻力系数 空气阻力系数 滑行试验 测试方法 油耗 

分 类 号：U461.1[机械工程—车辆工程]