欢迎访问《汽车安全与节能学报》，
汽车安全与节能学报

JASE

• 汽车节能与环保 • 上一篇    下一篇

基于PEMS 的缸内直喷汽油机颗粒物排放特性

银增辉1,2，付铁强2，李国田2，景晓军2，王振宇2，方茂东2   

  1. （1. 天津大学 天津 300300，中国； 2. 中国汽车技术研究中心，天津 300162，中国）
  • 收稿日期:2017-09-27 出版日期:2018-03-31 发布日期:2018-04-10
  • 作者简介:银增辉(1986—)， 男( 汉)，河南，工程师。E-mail: yinzenghui@catarc.ac.cn。
  • 基金资助:

    中国汽车技术研究中心重点课题(17180109) ；中汽研汽车检验中心（天津）有限公司课题(TJKY1718009)。

Particulate emission of direct injection gasoline engine with PEMS

YIN Zenghui 1,2, FU Tieqiang 2, LI Guotian 2, JING Xiaojun 2, WANG Zhenyu 2, FANG Maodong 2   

  1. (1. Tianjin University, Tianjin 300300, China; 2. China Automotive Technology & Research Center, Tianjin 300162, China)
  • Received:2017-09-27 Online:2018-03-31 Published:2018-04-10

PDF

656

摘要：

      为适应国6 等日益严苛的排放法规，汽油机颗粒捕集器(GPF) 被认为是一种应对缸内直喷(GDI) 汽油机颗粒物排放限值最有效的潜在技术。本文以装有GPF 的2.0T GDI 发动机为研究对象，采用便携式排放测试系统(PEMS) 研究了转速、负荷变化对发动机颗粒数(PN) 排放特性的影响，以及不同排温下GPF 的捕集效率的影响。结果表明：GDI 汽油机总颗粒物数量浓度在转速不变时，随着负荷的增加呈现明显的先下降后急剧上升的U 型趋势；GPF 再生过程中，会出现GPF 后PN 浓度大于GPF 前的浓度的现象；一定程度内，灰分层的积累使汽油机颗粒捕集器过滤机理中的拦截沉积作用增强，深层过滤效果明显，捕集效率快速增大。

关键词: 缸内直喷(GDI) 汽油机, 汽油机颗粒捕集器(GPF) , 便携式排放测试系统(PEMS) , 颗粒数, 缸内直喷(GDI) 汽油机, 汽油机颗粒捕集器(GPF) , 便携式排放测试系(PEMS) , 颗粒数 (PN) ；捕集效率

Abstract:

Gasoline particle filter (GPF) is one of the most effective potential particulate emission limit technology for a direct injection gasoline (GDI) engine along with the increasingly stringent national regulations version 6 about emissions. This paper investigated the effect of speed and load variation on the emission characteristics of engine particle number (PN) and the effect of GPF capture efficiency under different temperatures using a test equipment of portable emission measurement system (PEMS) in a 2.0T GDI engine equipped with a GPF. The results showed that the total particle number (PN) concentration of GDI gasoline
engine has a trend of "U", which increases sharply after the increase of load, and the PN concentration in the GPF is higher than that before the GPF. The accumulation of ash layer increases the interception and deposition of the mechanism of the particulate filter of the gasoline engine, deep bed filtration regime enhances and the filtering efficiency increases.

Key words: gasoline direct injection (GDI) engines, gasoline particle filter (GPF), portable emission measurement system (PEMS), particle number (PN), filtering efficiency