城市混合道路行驶工况的能量利用率研究

随着机动车保有量的不断增加,汽车燃油消耗迅速增加,能源短缺问题越来越严峻。汽车的污染物排放、燃油消耗量和运行经济性受汽车实际行驶工况的影响较大。在分析国内外行驶工况研究现状的基础上,根据车辆在城市混合道路上经历加速、匀速、减速、怠速各种工况变化的行驶情况,定义能耗、能态、能量利用率的概念,利用车辆没有制动行驶克服空气阻力和滚动阻力下的自由行驶距离构建能量利用率模型,并将此模型在我国市区的行驶工况下进行应用,计算出标准工况下的能量利用率。研究表明:车辆的能量利用率不到40%,提升空间较大,为减少能源消耗提供新的研究方向。

Study on Energy Utilization Ratio of Driving Conditions on Urban Mixed Roads

With the rapid increase of vehicle ownership and vehicle＇s fuel consumption,the energy shortage problem has been very serious. The emissions, fuel consumptions and running economy of vehicle are influenced greatly by the actual driving conditions. Based on introducing the foreign and domestic research status on driving conditions, according to the different driving states of vehicle under the acceleration, deceleration,uniform and idle speed conditions on mixed urban roads, this paper put forward the concepts of energy consumption, energy state and energy utilization ratio. And moreover, this paper used the {ree driving distance of vehicle which overcomes the air resistance and rolling resistance without braking to establish the energy utilization ratio model and applied this model to implement the study of our county＇s driving conditions. The research results show that the energy utilization rate is less than 40% and the improvement is needed,which provides new research directions for reducing energy consumption.