Experimental Research on Periodic Injection Control Strategy for Urea-SCR System

胡杰; 欧文中; 王天田; 颜伏伍

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Experimental Research on Periodic Injection Control Strategy for Urea-SCR System

更新时间：2026-04-16

- Experimental Research on Periodic Injection Control Strategy for Urea-SCR System
- Vol. 38, Issue 2, Pages: 48-53(2017)
- 作者机构：
  
  武汉理工大学现代汽车零部件技术湖北省重点实验室汽车零部件技术湖北省协同创新中心,武汉,430070
- 作者简介：
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- Published：2017
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胡杰，欧文中，王天田，颜伏伍.Urea-SCR系统周期性喷射控制策略试验研究[J].内燃机工程,2017,38(2):48-53.

胡杰, 欧文中, 王天田, et al. Experimental Research on Periodic Injection Control Strategy for Urea-SCR System[J]. 2017, 38(2): 48-53.
胡杰，欧文中，王天田，颜伏伍.Urea-SCR系统周期性喷射控制策略试验研究[J].内燃机工程,2017,38(2):48-53. DOI：

胡杰, 欧文中, 王天田, et al. Experimental Research on Periodic Injection Control Strategy for Urea-SCR System[J]. 2017, 38(2): 48-53. DOI：

摘要

根据发动机稳态工况下的氮氧化物（NOx）转化率试验发现了NOx 转化效率峰值现象，通过分析从理论上解释了该现象。根据NOx 转化效率峰值现象，提出了尿素选择性催化还原（urea-SCR）系统周期性喷射设想。设计试验，通过对比自主urea-SCR系统周期性喷射策略与商业urea-SCR喷射策略的试验结果，发现urea-SCR系统周期性喷射在NOx 转化效率、尿素喷射量、氨泄漏及尿素能效比等方面均有显著改善，对优化urea-SCR系统尿素喷射控制策略有重要意义。

Abstract

The phenomenon of a peak NOx conversion efficiency found in a test for NOx conversion under engine steady state condition was analyzed theoretically. A periodic injection control strategy for a urea-SCR system was put forward based on this phenomenon to promote NOx conversion efficiency. A test was designed and the comparison was made of the proposed urea-SCR periodic injection control strategy and a commercial urea-SCR injection control strategy. The result shows the former strategy has a remarkable improvement in terms of NOx conversion efficiency， urea injection dosing， NH3 slipping， and energy efficiency to urea ratio， which has a great significance in optimizing the injection control strategy of a urea-SCR system.

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