农用运输车实际道路油耗特征研究

利用SEMTECH-DS车载测试系统,选择3辆农用运输车进行实际道路车载测试,获得测试车辆速度和CO2、CO、NOx、HC等气态污染物逐秒排放数据.基于碳平衡原理计算得到测试车辆油耗因子,测试车辆平均百公里油耗为2.84 L,CO2、CO、NOx和HC基于油耗平均排放因子分别为3 022.7 g.kg-1、127.6 g.kg-1、58.1 g.kg-1和11.4 g.kg-1.对工况与油耗之间的关联进行解析,结果表明:油耗速率随速度、加速度的增加而升高;百公里油耗随速度增加总体呈下降趋势,随加速度增加而升高;加速运行模式下的油耗速率和百公里油耗最高,匀速次之;油耗速率与VSP呈现很好的相关规律.

STUDY ON ROAD FUEL CONSUMPTION CHARACTERISTICS FROM RURAL VEHICLES

On-road tests of three rural vehicles were conducted using SEMTECH-DS.The speed and instantaneous emission concentration data of CO2,CO,NOx and HC were recorded,and the fuel consumption factors were calculated based on carbon balance principle,the average fuel consumption per 100 kilometers is 2.84L and the average fuel-based emission factors of the CO2,CO,NOx and HC are 3022.7g·kg-1,127.58g·kg-1,58.05g·kg-1 and 11.35g·kg-1 for the tested rural vehicles,respectively.The relationship between the driving cycle and fuel consumption were analyzed based on the testing data,The results show that,the fuel consumption rate increases with the increase in speed and acceleration;the fuel consumption per 100 kilometers decreases with the increase in speed and increases with the increase in acceleration;the fuel consumption rate and fuel consumption per 100 kilometers are the highest at the acceleration mode,then the cruise mode;in addition,the fuel consumption rate shows a very good correlation with VSP.