整车滑行阻力测试及优化

Vehicle Coasting Resistance Test and Optimization

为了量化整车阻力对汽车燃料消耗量的影响,首先采用理论计算结合测试对比的方法分析主动近气格栅对风阻的影响,并通过底盘测功机设置不同滑行阻力测试燃料消耗量;通过对比ISO 28580和SAE J2452两种测试滚动阻力的方法,分别给出了不同型号的轮胎滚动阻力系数,结果显示SAE J2452测试方法可以更好的评价滚阻系数对燃料消耗量的影响。研究结果表明,通过改善风阻和滚阻可以显著降低整车燃料消耗量,并且明确了风阻系数和滚阻系数与燃料消耗量之间的线性关系。

In order to quantify the vehicle resistance influence on vehicle fuel consumption,the first method to test the contrast analysis is obtained by using the theory of active near the gas grill on the influence of wind resistance,and through setting different sliding resistance of chassis dynamometer test fuel consumption.By comparing ISO 28580 and SAE J2452 test methods of rolling resistance,the rolling resistance coefficient of different types of tires was given respectively.The results show that SAE J2452 test method can better evaluate the impact of rolling resistance coefficient on fuel consumption.The results show that the fuel consumption of the vehicle can be significantly reduced by improving the wind resistance and roll resistance,and the linear relationship between the wind resistance coefficient and roll resistance coefficient and fuel consumption is clarified.