江苏大学学报（自然科学版）2011，Vol.32Issue(5)：506-510,5.DOI:10.3969/j.issn.1671-7775.2011.05.003
后喷对轻型柴油机燃烧过程及排放性能的影响
Influence of post-injection strategy on combustion process and emission characters at low load working condition in light-duty diesel engine
摘要
Abstract
Taken a light-duty diesel engine as prototype, the influences of post-injection 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 post-injection. With the increasing of the post-injection 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 post-injection interval angle, while the average combustion temperature decreases. At the condition of low load rate, NOx and soot emissions can be efficiently reduced by post-injection and gradually decreased by the increase of post-injection fuel quantity. With the increasing of post-injection 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 post-injection and the increasing of post-injection fuel quantity and post-injection interval angle.关键词
柴油机/后喷/高压共轨/排放/燃烧Key words
diesel engine/ post-injection/ high pressure common rail/ emission/ combustion分类
信息技术与安全科学引用本文复制引用
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):506-510,5.基金项目
江苏省科技成果转化专项资金项目(BA2009060) （BA2009060）
江苏省自然科学基金资助项目(BK2009700) （BK2009700）
江苏省动力机械清洁能源与应用重点实验室开放基金资助项目(Q K08006) （Q K08006）
