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汽车安全与节能学报

汽车安全与节能学报 ›› 2014, Vol. 5 ›› Issue (03): 304-310.DOI: 10.3969/j.issn.1674-8484.2014.03.014

• 汽车节能与环保 • 上一篇    

缸内直喷汽油机微粒排放特性的试验研究

帅石金 ，郑 荣，王银辉，付海超，徐宏明   

  1. 清华大学 汽车安全与节能国家重点实验室，北京100084
  • 收稿日期:2014-06-26 出版日期:2014-09-25 发布日期:2014-10-08
  • 作者简介:第一作者 / First author ： 帅石金（1965 －），男（汉），江西，教授。E-mail: sjshuai@tsinghua.edu.cn 第二作者 / Second author ： 郑荣(1986 － )，男（汉），广西，硕士研究生。E-mail: zhengrong.china@163.com
  • 基金资助:

    国家自然科学基金重点项目（51036004）；国家“九七三”重点基础研究发展计划（2013CB228502）

Experimental study on the characteristics of particulate emissions from GDI engines

SHUAI Shijin, ZHENG Rong, WANG Yinhui, FU Haichao, XU Hongming   

  1. State Key Laboratory of Automotive Safety and Energy, Department of Automotive Engineering, Tsinghua
    University, Beijing 100084, China
  • Received:2014-06-26 Online:2014-09-25 Published:2014-10-08

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摘要： 试验研究了缸内直喷（GDI）汽油机的负荷、过量空气系数、点火时刻等参数对于三效催化器
（TWC）后的颗粒（PM）排放特性的影响。试验在在2 台GDI 汽油机上进行，用气相质谱- 色谱（GC-MS）
联用方法，分析了TWC 后微粒中可溶有机成分(SOF)。结果表明：随着负荷增加，微粒质量和数量排
放增加，在满负荷工况下，微粒排放大幅增加；TWC 后的SOF 和核态微粒数量明显降低；随着过量空
气系数的增加和点火时刻的推迟，微粒排放呈减少趋势；核态粒径峰值为10~20 nm，积聚态粒径峰
值为50~70 nm。负荷、过量空气系数和点火提前角等参数和TWC 对微粒粒径范围的影响小。

关键词: 汽油机, 缸内直喷（GDI）, 微粒质量, 微粒数量, 粒径分布, 试验

Abstract: Particulate emission experiments were conducted on two gasoline direct injection (GDI) engines to
study the influence of engine load, excess air ratio, and ignition advanced angel on the emission characteristics
such as particulate mass (PM), particulate number (PN), and size distribution after three way catalyst (TWC). The
component of soluble organic fractions (SOF) was analyzed using gas chromatograph-mass spectrometer (GCMS).
The results show that the PM and PN increase with the engine load, and the magnitudes of the increase
are significant at high load. The PM and PN both decrease with the increase of excess air ratio and the delay of
ignition timing. The catalyst reduces the SOF in the particulate matter and the concentration of the nucleation mode
particles. The peak diameter of the nucleation mode particles is between 10 and 20 nm; and the peak diameter of
the accumulation mode particles is between 50 and 70 nm. The engine load, TWC, excess air ratio and ignition
timing have small influences on the particle diameter range.

Key words: gasoline engines, gasoline direct injection (GDI), particulate mass, particulate number, size distribution, experiments

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