农业工程学报2012，Vol.28Issue(5)：44-49,6.DOI:10.3969/j.issn.1002-6819.2012.05.008
EGR对轻型柴油机缸内燃烧及排放性能影响的可视化
Visualization of influence of ERG on combustion process and emission performance for light-duty diesel engine
摘要
Abstract
In order to exploring the influence of EGR on combustion and emission characteristics in a low load working condition on a light-duty diesel engine. Taking one high pressure common rail light-duty diesel engine as the research object, a visualization platform for cylinder working process of a diesel engine was built. Influence of EGR on combustion process and emission characteristics was studied through cylinder combustion process high-speed photography, cylinder pressure and heat release rate. The study illustrated that spray and combustion process was analyzed directly through visualization platform. In a condition of low load, with the EGR rate increased (^=30%), the ignition delay shortened, and the combustion process extended, meanwhile the maximum combustion pressure, the peak of heat release rate and the average temperature of combustion last stage rose. Compared with the EGR rate of 10%, the Nox, HC and CO emissions reduced by 65.6%, 46.4% and 28.7%, soot emissions first decreases and then increases. The soot emission and fuel economy worsened when the EGR rate was over 30%. This study provided an effective way of reducing diesel emission关键词
柴油机/排放控制/燃烧/可视化Key words
diesel engine/ emission control/ combustion/ visualization分类
能源科技引用本文复制引用
贾和坤,刘胜吉,尹必峰,黄晨春..EGR对轻型柴油机缸内燃烧及排放性能影响的可视化[J].农业工程学报,2012,28(5):44-49,6.基金项目
江苏省科技成果转化专项资金项目(BA2009060) （BA2009060）
江苏省优势学科建设项目 （）
江苏省普通高校研究生科研创新计划项目(CXZZ11 0561) （CXZZ11 0561）
江苏省动力机械清洁能源与应用重点实验室开放基金项目(QB08006) （QB08006）
