Abstract: As the primary energy-consuming accessory within the vehicle, the air conditioning system has a significant impact on the actual fuel consumption of the vehicle, holding considerable energy-saving potential. Based on environmental chambers, sunlight simulation devices, chassis dynamometers, etc., experiments are conducted to test the energy consumption of the air conditio-ning system of a light-duty truck under different environmental temperatures, light intensities, and testing cycles. The study reveals that under various environmental conditions and testing cycles, the energy consumption of the vehicle's air conditioning system accounts for 10% to 15% of the total fuel consumption. Furthermore, compared to the China-world transient vehicle cycle (C-WTVC), under the China heavy-duty commercial vehicle test cycle-light truck (CHTC-LT), the vehicle experiences frequent acceleration and deceleration, resulting in more transient engine conditions. This leads to a 3.22% increase in the total fuel consumption. However, under the CHTC-LT, the average engine speed is 6.15% lower than that of the C-WTVC. At lower speeds, the energy consum- ption of the air conditioning compressor is correspondingly lower. Therefore, under CHTC-LT, the air conditioning fuel consumption is approximately reduced by 11.42% compared to C-WTVC. Additionally, the study finds that the energy consumption of automotive air conditioning and the emission of carbon pollutants are directly proportional to environmental temperature and light intensity. An increase of 100 W/m2 in light intensity leads to an approximately 1% increase in air conditioning fuel consumption.

Key words: Heavy-duty vehicles; Vehicle's air condition; Fuel consumption; Environmental parameters

摘要： 汽车空调作为整车内部主要耗能附件，对车辆实际使用油耗的影响巨大，有着很大的 节能潜力。文章基于环境仓、阳光模拟设备、底盘测功机等设备，开展了一台轻型货车不同 环境温度、光照强度及测试循环下汽车空调能耗测试试验。研究发现，不同环境条件和测试 循环下，测试车辆空调能耗占总燃料消耗量的 10%～15%。此外，研究结果表明，相比中国- 全球瞬态整车循环（C-WTVC），中国重型车商用车测试工况（CHTC-LT）循环下车辆加减速 频繁，发动机瞬态工况较多，导致 CHTC-LT 总油耗比 C-WTVC 高，增长 3.22%。但是，CHTC- LT 工况下发动机平均转速较 C-WTVC 工况低 6.15%，低转速下空调压缩机耗能也相应较低， 所以 CHTC-LT 工况下空调油耗比 C-WTVC 大约降低 11.42%。此外，研究发现，汽车空调能 耗和含碳污染物排放量与环境温度、光照强度成正比，增加 100 W/m2 的光照强度会使浸车后 的驾驶舱内温度增加 2 ℃左右，并延缓驾驶舱内的温度下降速率，最终导致空调油耗增加约 1%。

关键词: 重型车；汽车空调；能耗；环境参数