不同能量管理策略的增程电动汽车排放的实际道路试验

Real road tests of the emission from extended-range electric vehicles with different energy management strategies

为研究增程式电动汽车在不同能量管理策略下对污染物排放的影响,对2辆增程式电动汽车在不同驾驶工况下进行了实际道路试验。对排放数据聚类得到瞬时高排放集合(IHES),通过发动机转速、节气门开度等发动机参数对一氧化碳(CO)、细颗粒数量(PN)瞬时高排放的影响进行了分析。结果表明:能量管理策略会影响CO瞬时高排放的分布规律,相比于功率跟随策略,多点控制策略易使得车速处于高速阶段时产生CO瞬时高排放。不同驾驶行为不会对增程式电动汽车CO、PN瞬时高排放的分布规律造成明显影响,而拥堵路况下发动机冷却液温度相对低,再启动时产生了更多的PN瞬时高排放。

Several real driving tests were done on different extended-range electric vehicles to investigate the influence of two kines of energy management strategies at two driving conditions on the emission from extended-range electric vehicles.The instantaneous high emission set(IHES)was obtained by clustering the emission data.The influence of internal parameters such as engine speed and throttle position on instantaneous high emission of carbon monoxide(CO)and particle number(PN)was analyzed.The experimental results show that energy management strategies can significantly affect the distribution regularity of instantaneous high CO emissions.Compared with the power following strategy,the multi-point control strategy produces instantaneous high CO emissions when the vehicle speed is high.Different driving behaviors have no significant influence on the distribution regularity of instantaneous high CO and PN emissions in extended-range electric vehicles.However,the engine coolant temperature is relatively low under congestion road conditions,resulting in more PN instantaneous high emissions during restart.