内燃机工程2018，Vol.39Issue(2)：43-47,5.DOI:10.13949/j.cnki.nrjgc.2018.02.007
低压EGR对GDI增压汽油机外特性下性能和排放影响
Effect of LP EGRon Performance and Emissions of a Turbocharged GDI Engine at Full Load
摘要
Abstract
The effect of low pressure EGR (Exhaust gas recirculation)and ignition timing on performance and emissions of a turbocharged GDI engine at full load was investigated experimentally, including in-cylinder pressure,emissions and fuel economy changed with rate of EGR.Results show that the use of EGR leads to an increase in combustion duration,a decrease in exhaust gas temperature and a change in combustion phase due to the EGR dilution effect.The positive effect is the decrease in fuel consumption and emissions of CO and NOx.The negative influence is the increase of THC emission and the exhaust pressure,resulting in an increase in pump losses.Hence a turbocharged GDI engine using EGR system and with ignition angle adjustment can improbe thermal efficiency and reduce NOx emissions.关键词
低压EGR/GDI/增压发动机/燃烧/排放Key words
low pressure EGR/GDI/turbocharged engine/combustion/emission分类
能源科技引用本文复制引用
曾契,沈凯,刘新续,周文平..低压EGR对GDI增压汽油机外特性下性能和排放影响[J].内燃机工程,2018,39(2):43-47,5.基金项目
四川省科技计划项目(2017JY0112)Sichuan Science and Technology Plan(2017JY0112) （2017JY0112）
