Abstract：Taken a lightduty diesel engine as prototype, the influences of postinjection on NOx and soot emission characters, combustion process and fuel consumption were discussed at the operating conditions of low load rate with common speed of 1 600 r·min-1. The results show that internal cylinder temperature rises again in the later of main combustion process due to postinjection. With the increasing of the postinjection fuel quantity, the main combustion section cylinder pressure, the maximum combustion temperature, the average combustion temperature and the peak value of the main combustion heat release rate are all gradually decreased. The main combustion section cylinder pressure and the peak combustion heat release rate increase slightly with the increasing of the postinjection interval angle, while the average combustion temperature decreases.At the condition of low load rate, NOx and soot emissions can be efficiently reduced by postinjection and gradually decreased by the increase of postinjection fuel quantity. With the increasing of postinjection interval angle, the NOx emission gradually decreases and the soot emission shows an upward trend after the initial decrease. The fuel consumption is increased by postinjection and the increasing of postinjection fuel quantity and postinjection interval angle.
尹必峰, 何建光, 徐毅, 贾和坤, 刘胜吉. 后喷对轻型柴油机燃烧过程及排放性能的影响[J]. 江苏大学学报（自然科学版）, 2011, 32(5): 506-510.
YIN Bifeng, HE Jianguang, XU Yi, JIA Hekun, LIU Shengji. Influence of post-injection strategy on combustion process and emissioncharacters at low load working condition in lightduty diesel engine[J]. Journal of Jiangsu University(Natural Science Eidtion)
, 2011, 32(5): 506-510.
2011, Vol. 32 
