轻型车海拔环境下滑行阻力试验研究

为了研究海拔高度和温度等试验条件变化时汽车滑行阻力的变化规律，并对一种汽车滑行阻力修正方法进行验证，本文对三辆试验车进行了四个海拔高度和四个温度条件下的滑行试验，得出了实测阻力和修正阻力，试验结果表明：文中提到的滑行阻力修正方法能够精确地将0米20℃条件下车辆的滑行阻力修正到不同海拔高度和温度条件下，误差在±5%以内，最大绝对误差可保持在10%以内，且对不同类型车辆都适用，通过该方法的使用，可节省试验成本和时间。

Experimental Study on the Coastdown Resistance for Light-duty Vehicles at Various Altitudes

In order to study the variation of automotive coastdown resistance at different altitudes and temperatures, and verify the modification method of automotive coastdown resistance. so coastdown tests are conducted for three light-duty vehicles at four altitudes and four temperatures in this paper, then the real coastdown resistance and the modified resistance are obtained, and the results shows that： the modification method of automotive coastdown resistance presented in this paper can modify the automotive coastdown resistance at 0m and 20℃to that at various altitudes and temperatures preciously, with the average error of ±5% and the maximum error of 10%; besides, the modification method can be used for different kinds of vehicles;by using this method the cost and time of automotive test can be saved.