摘要
通过汽车滑行试验,可获取汽车阻力系数。在试验数据处理中发现,重复进行汽车滑行阻力试验,阻力系数求取结果一致性比较差,在本文采用的试验实例中,平均相对偏差分别为:常数项系数3.48%,一次项系数27.66%,二次项系数5.63%。这是由于阻力系数对汽车减速的作用相互耦合造成的。为此,需要研究其他维度来描述滑行试验结果中的道路阻力,本文提出从等效能量消耗率的维度描述汽车滑行试验结果。试验表明,使用等效能量消耗率描述滑行阻力结果,其平均相对偏差仅为1.14%.使用等效能量消耗率描述还具备鲜明的物理意义,综合概括汽车各类阻力的大小。
The vehicle drag coefficient can be obtained through the vehicle taxiing test.In the test data processing, it is found that the auto sliding resistance test is repeated, and the consistency of the resistance coefficient is poor. In the experimental cases adopted in this paper, the average relative deviations are as follows: constant term coefficient 3.48%, first term coefficient 27.66%, and two term coefficient 5.63%. This is due to the coupling effect of drag coefficient on vehicle deceleration. Therefore, it is necessary to study other dimensions to describe the road resistance in the sliding test results. In this paper, the results of vehicle taxiing test are described from the dimension of equivalent energy consumption. The experimental example shows that the average relative deviation is only 1.14%. using the equivalent energy consumption description with the equivalent energy consumption to describe the result of the sliding resistance.
作者
龚春忠
张永
彭庆丰
GONG Chun-zhong;ZHANG Yong;PENG Qing-feng(Zhejiang Hozon New Energy Automobile Co.,Ltd.,trial production test department,Jiaxing,Zhejiang 314000,China;Yangtze Delta Region Institute of Tsinghua University,Zhejiang New Energy Vehicle R&D Center,Jiaxing,Zhejiang 314000,China)
出处
《汽车科技》
2019年第2期25-29,共5页
Auto Sci-Tech
关键词
汽车滑行试验
等效能量消耗率
阻力系数
Automobile skidding test
Equivalent power consumption
Resistance coefficient
