柴油轿车燃用生物柴油的排放特性

Emission Characteristics of a Diesel Car Fueled with Biodiesel

在一辆柴油轿车上燃用纯柴油、柴油中分别掺混5%、10%、20%和50%的B5、B10、B20和B50混合燃料以及纯生物柴油B100,进行整车NEDC循环的排放试验,研究其CO、HC、NOx和PM的排放特性。结果表明:柴油轿车燃用这6种燃料的CO、HC和PM排放主要集中在ECE15市区行驶循环,而EUDC城郊行驶循环的NOx排放量比ECE15循环有所增加。随着生物柴油掺混比例的升高,柴油轿车的CO、HC和PM排放量均有所降低。燃用掺混比例较低的B5、B10和B20混合燃料时,NOx排放略低于纯柴油;而燃用掺混比例较高的B50和B100时的NOx排放比纯柴油高。

A emission test with NEDC driving cycle is performed on a diesel car, fueled with pure diesel （B0）, dieseL/hiodiesel blend fuels B5, B10, B20 and B50 obtained by adding different proportions （5% , 10% , 20% and 50% ） of biodiesel into diesel and pure biodiesel fuel B100 respectively to investigate its emission characteristics of CO, HC, NOx and PM. The results show that the CO, HC and PM emissions of the diesel car fueled with abovementioned 6 fuels mainly concentrate at the urban driving cycle ECE15, while NOx emissions at the EUDC cy- cle are more than that with the ECE15 cycle. All CO, HC and PM emissions of the diesel car reduce with the increase in biodiesel blending proportion. As for NOx, its emissions with lower biodiesel blending fuels （ B5, B10 and B20） are slightly lower than that with pure diesel while its emissions with higher biodiesel blending fuels （ B50 and B100） are higher than that with diesel fuel.