摘要
分析了轻型汽车道路行驶阻力的数学模型,并在阐述滑行法测量道路行驶阻力的试验方法后,通过多组对比试验得出:轮胎和环境温度是影响滑行时间t的主要因素;尤其是试验环境温度与标态温度相差越大,行驶阻力相对偏差越大。并对如何通过提高滑行时间的统计精度p来尽量减少滑行次数提出几点措施。
This article analyses the mathematical model of road running resistance of Light-duty Vehicles,and expounds the method of measuring the road running resistance by means of the coast-down method. According to several groups of the experiment comparison, this paper presents that tyre and environment temperature are the two main factors to influence the coasting time. Even more,the greater the departure between the temperature of test environment and standard is,the greater the relative discrepancy of running resistance will be. Additionally,the author puts forward some suggestions of how to improve the statistical precision ＇p ＇of the coasting time as well as reducing the times of the coasting test.
出处
《汽车科技》
2008年第4期54-57,共4页
Auto Sci-Tech
关键词
行驶阻力
滑行法
对比试验
滑行时间
相对偏差
统计精度
running resistance
coast-down method
experlment comparison
coasting time
relative discrepancy
statistical precision
