Abstract: On the basis of the foreign and domestic research status on driving conditions，the research models of energy consumption were summarized and the concepts of energy consumption，energy state and energy utilization ratio were presented． According to the driving distance of vehicle under the acceleration，deceleration and idle speed conditions and the free driving distance，the different energy utilization ratio models were established and applied to the Europe 15-Mode Test Cycle without considering air resistance． The energy utilization ratio of light vehicle，including the energy utilization ratio of full travel distance，half travel distance and free travel distance was calculated． The result shows the energy is not fully utilized and there is greater space to use the energy effectively，and provides the recommendations for the vehicle safety，energy saving and environmental protection．

Key words: driving condition, rolling resistance, 15-Mode Test Cycle, energy utilization ratio, energy consumption

摘要： 介绍了国内外行驶工况的研究现状,总结了能量消耗研究模型,提出了能耗、能态、各种能量利用率的概念。 在不考虑空气阻力的基础上根据车辆在加速、减速、怠速各种工况下的行使距离及自由行使距离建立了多种能量利 用率模型； 将此模型在欧洲十五工况法下进行应用,计算轻型车相应的全行程利用能量利用率、半行程能量利用率、 自由行程能量利用率。结果表明: 能量都没有被有效利用,有很大提升空间,为汽车在安全、节能、环保等方面提供 新的研究方向。

关键词: 行驶工况, 滚动阻力, 十五工况法, 能量利用率, 能耗