摘 要：整車行驶阻力直接关乎油耗的高低，在行驶阻力中起决定性的是轮胎滚动阻力与风阻力。为了直接有效的降低油耗，对轮胎滚动阻力与风阻力研究势在必行。结合整车实际道路滑行试验与混合动力台架传动系统内阻力试验，利用最小二乘法将轮胎与地面的滚动阻力系数与整车行驶时的风阻系数拟合出来。轮胎滚动阻力系数与风阻系数的确定可以有效地指导整车实际道路行驶阻力的改进方向以及提升目标。
　　关键词：行驶阻力 风阻 滚动阻力 最小二乘法
　　Research on Rolling Resistance and Wind Resistance Coefficient based on Least Square Method
　　Xu chan，Gong Chunhui，Liu Haifeng，Chen Weitao
　　Abstract：The driving resistance of the whole vehicle is directly related to the fuel consumption， and the decisive driving resistance is the tire rolling resistance and wind resistance. To reduce fuel consumption directly and effectively， it is imperative to study tire rolling resistance and wind resistance. Combined with the actual road sliding test of the vehicle and the resistance test in the transmission system of the hybrid electric bench， the rolling resistance coefficient between the tire and the ground and the wind resistance coefficient of the vehicle are fitted by the least square method. The determination of tire rolling resistance coefficient and wind resistance coefficient can effectively guide the improvement direction and goal of vehicle actual road driving resistance.
　　Key words：driving resistance， wind resistance， rolling resistance， least square method