稀燃汽油机排放控制后处理系统试验

齐鸿达; 谈秉乾; 谢莲; 徐立; 杨延相; 刘昌文

doi:10.16236/j.cnki.nrjxb.202603029

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稀燃汽油机排放控制后处理系统试验

更新时间：2026-05-27

- 稀燃汽油机排放控制后处理系统试验
- Vol. 44, Issue 3, Pages: 271-277(2026)
- 作者机构：
  
  1. 天津大学先进内燃动力全国重点实验室
  2. 无锡恒和环保科技有限公司
  3. 浙江福爱电子有限公司
- 作者简介：
- 基金信息：
- DOI：10.16236/j.cnki.nrjxb.202603029
  CLC： TK411.5
- Published：2026
- 稿件说明：
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齐鸿达, 谈秉乾, 谢莲, et al. 稀燃汽油机排放控制后处理系统试验[J]. 2026, 44(3): 271-277.
DOI：

齐鸿达, 谈秉乾, 谢莲, et al. 稀燃汽油机排放控制后处理系统试验[J]. 2026, 44(3): 271-277. DOI： 10.16236/j.cnki.nrjxb.202603029.

摘要

为解决三元催化器（TWC）无法有效处理稀薄燃烧汽油机尾气污染物问题，基于一台1.5 L的3缸发动机改装的稀燃汽油机，设计了由汽油机氧化催化（GOC）、汽油机颗粒捕集（GPF）、选择性催化还原（SCR）及尿素喷射系统组成的后处理排放控制系统．试验研究了TWC、GOC与TWC+GOC分段涂覆3种方案在稳态工况和常温冷起动工况下对HC、CO的转化效率；并对不同SCR催化剂配方高温区间的NO

转化效率进行了测试．结果表明：稳态工况当量比条件下，TWC和GOC对HC和CO的转化效率高于98%；而在稀燃工况下，GOC对HC和CO的转化效率高于TWC，分别达到97%和98%．在当量比冷起动时，TWC对HC和CO污染物转化效率高于GOC，而在稀燃工况下，GOC表现更好；TWC+GOC对全工况下HC和CO的转化效率均达到较高水平．优化后的SCR催化剂配方，在500℃以上高温段NO

转化效率获得大幅提升．

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references

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