轮胎滚动阻力影响因素试验分析

Experimental Analysis of Influence Factors on Tire Rolling Resistance

为了提高汽车的燃油经济性,最大限度地降低汽车行驶过程中的滚动阻力,依托某公司STL滚动阻力试验机,选取不同规格的轮胎采用控制变量法进行速度、充气压力以及负荷对滚动阻力影响的试验。通过对试验数的分析表明,滚动阻力随汽车行驶速度的提高呈现先减小后增大的变化趋势,在整个速度范围内存在最佳行驶速度。随着充气压力的增加,滚动阻力逐渐减小,为提高整车的燃油经济性,可适当增大轮胎的充气压力。随着负荷的加大,滚动阻力呈现近似线性的增长趋势,但滚动阻力系数基本保持不变。因此,在获得同等精度的滚动阻力系数前提下,可以降低轮胎的试验负荷以达到节约试验成本的目的。

To improve vehicle fuel economy and reduce rolling resistance as much as possible,based on STL rolling resistance testing machine of a company,different specifications of tire and apply controlling variable method to conduct experiments were selected.The experiments aimed at exploring the influence of speed,inflation pressure and load on tire rolling resistance.Test data showed that with the consistent increase of speed,rolling resistance presents the trend of increasing first then decreasing.So from the perspective of reducing rolling resistance,there exists the best speed in the whole speed range.With the increase of inflation pressure,rolling resistance decreases continuously and improving the inflation pressure help reduce tire rolling resistance.And with the increase of load,rolling resistance presents the approximate linear growth trend but the rolling resistance coefficient remains unchanged.So reduced test load also gain the same accuracy of rolling resistance coefficient,which can cut the experiment cost.