汽车工程

汽车工程 ›› 2024, Vol. 46 ›› Issue (3): 483-488.doi: 10.19562/j.chinasae.qcgc.2024.03.012

• • 上一篇    

轻型汽油车NH3排放研究

方娜,陈涛(),管永超,方勇,万建,刘成,田颖,秦建宾,王小涛,康文霞   

  1. 东风汽车集团有限公司技术中心，武汉 430058
  • 收稿日期:2023-08-09 修回日期:2023-08-21 出版日期:2024-03-25 发布日期:2024-03-18
  • 通讯作者: 陈涛 E-mail:chentao@dfmc.com.cn

Research on NH3 Emission of Light Duty Gasoline Vehicle

Na Fang,Tao Chen(),Yongchao Guan,Yong Fang,Jian Wan,Cheng Liu,Ying Tian,Jianbin Qin,Xiaotao Wang,Wenxia Kang   

  1. Dongfeng Motor Corporation Technical Center，Wuhan 430058
  • Received:2023-08-09 Revised:2023-08-21 Online:2024-03-25 Published:2024-03-18
  • Contact: Tao Chen E-mail:chentao@dfmc.com.cn

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摘要：

研究了某1.5T SUV车不同排放测试循环（WLTC与CLTC）和催化剂不同状态（新鲜和老化）对NH3排放的影响。通过试验研究表明：发动机原始NH3排放量很低，而经过第一块三元催化剂后，NH3排放量大幅增加。催化剂老化后OSC降低，内部空燃比波动幅度大，经过老化催化剂的NH3排放相对新鲜催化剂的NH3排放有所增加。催化剂状态、排放测试循环和发动机空燃比等对NH3排放有明显影响，这些对于催化剂设计和标定优化均有指导意义。

关键词: NH3排放, 三元催化剂, 排放循环, 空燃比

Abstract:

The effect of different emission cycles （WLTC and CLTC） and catalyst states （fresh and aged） on NH3 emission of a 1.5T SUV is studied. Experimental research shows that the original NH3 emission of the engine is very low， but after the first ternary catalyst， the NH3 emission significantly increases. After catalyst aging， the OSC decreases and the internal air fuel ratio fluctuates significantly. NH3 emission from aged catalysts increases compared to that from fresh catalysts. The catalyst state， emission cycle， and engine air fuel ratio have a significant impact on NH3 emission， which is of guiding significance for catalyst design and calibration optimization.

Key words: NH3 emission, TWC, emission cycle, air fuel ratio