GDI发动机喷油压力对喷雾特性的影响研究
Study on the Influence of Injection Pressure on Spray Characteristics for GDI Engine
王雅南 1马金强 1许晶 1郝学信 1孙铁钢1
作者信息
- 1. 宁波吉利罗佑发动机零部件有限公司 浙江 宁波 315336
- 折叠
摘要
GDI汽油机喷油器的喷雾特性对于汽油机混合气的形成和燃烧性能具有非常重要的影响.通过定容喷雾测试系统,研究 5、17和 30 MPa的喷油压力对直喷汽油机喷油器喷雾流量、贯穿距、喷雾锥角、喷雾粒径和落点分布的影响,研究结果表明:同一喷油器,随着喷油压力的提高,喷油流量逐渐增长;贯穿距发展速度加快,后期受阻力的影响增长趋势减缓;喷雾锥角受喷油压力影响不大;喷雾粒径将明显减少,雾化更均匀.
Abstract
Spray characteristics have very important effect on the mixture formation and combustion perfor-mance for GDI engine.This paper studies the influence of injection pressure of 5MPa,17 MPa and 30 MPa on spray flow quantity,penetration,spray angle,Sauter mean diameter SMD and drop point distribu-tion for GDI engine by the constant volume chamber.The results show that,with the increase of injection pressure,the flow quantity will increase gradually,development speed of spray penetration will accelerate,but the trend will slow later because of resistance.Spray angle is not mainly influenced by injection pres-sure,the Sauter mean diameter SMD will decrease obviously and the spray is more uniform.
关键词
喷油压力/粒径/流量/贯穿距/喷雾锥角Key words
Injection pressure/Sauter mean diameter SMD/Flow quantity/Penetration/Spray angle引用本文复制引用
出版年
2024
NETL
NSTL
万方数据