Abstract: The influence of ambient temperature on the resistance of the vehicle will be directly fed back on the fuel consumption of the vehicle. In order to directly and effectively reduce fuel consumption, it is of great significance to study the effect of ambient temperature on the resistance of the vehicle. Combining the actual road sliding test of the whole vehicle and the internal resistance test of the rotating hub bench transmission system, it is found that the influence of ambient temperature on the main driving force of the whole vehicle is mainly reflected in three aspects: the influence on the transmission system, the influence on the air resistance and the influence on the tire rolling resistance. Carrying out a systematic study on these three aspects respectively, and finding out the mechanism of the influence of the ambient temperature on them, can effectively guide how to reduce the influence of the ambient temperature on the driving resistance of the car.

Key words: Ambient temperature; Transmission system; Air resistance; Rolling resistance; Vehicle driving resistance

摘要： 环境温度对汽车行驶阻力的影响会直接在整车油耗上呈现出来。有效地降低油耗，对 环境温度作用在整车阻力上的研究具有重大意义。结合整车实际道路滑行试验与转毂台架传 动系统内阻力试验，发现环境温度对整车行驶阻力的影响主要体现在对传动系统的影响、对 空气阻力的影响以及对轮胎滚阻的影响等三个方面。分别对这三个方面进行系统的研究，找 到环境温度对它们的影响机制，可以有效地指导如何降低环境温度对汽车行驶阻力的影响。

关键词: 环境温度；传动系统；空气阻力；滚动阻力；汽车行驶阻力