吉林大学学报(工学版) ›› 2018, Vol. 48 ›› Issue (1): 166-173.doi: 10.13229/j.cnki.jdxbgxb20161051

• 论文 • 上一篇    下一篇

压电喷油器多次喷射对GDI汽油机颗粒物排放的影响

卫海桥, 裴自刚, 冯登全, 潘家营, 潘明章   

  1. 天津大学 内燃机燃烧学国家重点实验室, 天津 300072
  • 收稿日期:2016-09-22 出版日期:2018-02-26 发布日期:2018-02-26
  • 通讯作者: 潘家营(1986-),男,在站博士后.研究方向:内燃机燃烧学.E-mail:jypan@tju.edu.cn
  • 作者简介:卫海桥(1974-),男,教授,博士.研究方向:内燃机燃烧学.E-mail:whq@tju.edu.cn
  • 基金资助:
    国家自然科学基金项目(91641203,51476114); 天津市科技计划项目(13ZCZDGX04400); 中国博士后科学基金项目(2016M591388,2016M590201)

Effect of multi-injectionpiezo injector on particulate emission in gasoline direct injection engine

WEI Hai-qiao, PEI Zi-gang, FENG Deng-quan, PAN Jia-ying, PAN Ming-zhang   

  1. State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China
  • Received:2016-09-22 Online:2018-02-26 Published:2018-02-26

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摘要： 为了研究不同喷油策略对颗粒物排放的影响,本文基于一台单缸直喷汽油机,并使用排气粒径谱仪对压电晶体喷油器多次喷射策略下的颗粒物排放特性进行了研究。结果表明:单次喷射时颗粒物粒径分布呈一个核态峰值和两个积聚态峰值的三峰形态,而两次和三次喷射呈两个核态峰值和一个积聚态峰值的三峰形态;相对于两次喷油策略,三次喷射时两个核态峰值粒径和峰值数量有所增加,而积聚态颗粒物显著减少。同时,相比单次喷射,合理组织两次和三次喷射策略能够显著降低颗粒物总数以及两个模态的颗粒物排放,并且两次喷射对降低核态颗粒物作用显著,三次喷射对减低积聚态颗粒物作用显著。此外,多次喷射还能够减少NOx的排放。

关键词: 动力机械工程, 压电喷油器, 多次喷射, 直喷汽油机, 颗粒物排放, 粒径分布

Abstract: To study the influence of spray strategies on particulate emission, the effect of multi-injection with piezo injector on particulate emission in Gasoline Direct Injection (GDI) engine was studied using Engine Exhaust Particle Size Spectrometer (EEPSS). Experimental results show that, with single injection there are one peak of nucleation mode and two peaks of accumulation mode in particle size distribution. In contrast, with multi-injection, there are two peaks of nucleation mode and one peak of accumulation mode in particle size distribution. Compared with double injection, in triple injection, PN of accumulation mode decreases a lot, and two peaks of nucleation mode increase a bit. Compared with single injection, the total particle number can decrease a lot with appropriate double injection and triple injection, and PN of two modes is also lower. At the same time, double injection can make a big decrease in nucleation mode, while tripe injection results in a big decrease in accumulation mode. Also multi-injection reduces NOx emission.

Key words: power machinery and engineering, piezoelectric injector, multi-injection, gasoline direct injection engine, particulate exhaust, size distribution

中图分类号: 

  • TK417
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