内燃机工程2018，Vol.39Issue(1)：34-41,8.DOI:10.13949/j.cnki.nrjgc.2018.01.006
早喷和气道喷射对汽油压燃燃烧和排放特性影响的研究
An Investigation into the Effect of Early Inj ection and Port-Fuel Inj ection on Combustion and Emissions of a Heavy-Duty Gasoline Engine
摘要
Abstract
An experimental investigation into the effect of early inj ection and port-fuel inj ection(PFI) on combustion and emissions of a modified single-cylinder test engine fueled with gasoline was carried out under low load conditions.Two inj ection strategies,the main direct inj ection with early inj ection and with FPI,were used respectively,and the inj ection parameters included the early inj ection time,early inj ection ratio and PFI ratio.Results show that the fuel inj ected by early inj ection and PFI mainly affected the later stage of the combustion and heat release process while the main inj ection mainly controlled the combustion starting point and the rapid heat release in the early stage of combustion process.Increased early inj ection ratio and PFI ratio will lead to retarded ignition,reduced combustion duration and increased combustion rate in the later stage of combustion process,and hence a low NOxemissions.The spray wall impingements caused by early injection can reduce the combustion efficiency and increase the unburned THC and CO emissions.关键词
气道喷射/早喷/汽油压燃/燃烧/排放Key words
PFI/early inj ection/gasoline compression ignition/combustion/emission分类
能源科技引用本文复制引用
杨彬,郑尊清,陈鹏,查海恩,马乃锋,尧命发..早喷和气道喷射对汽油压燃燃烧和排放特性影响的研究[J].内燃机工程,2018,39(1):34-41,8.基金项目
国家自然科学基金项目(51320105008,51576138)National Natural Science Foundation of China (51320105008,51576138) （51320105008,51576138）
