主办：陕西省汽车工程学会
ISSN 1671-7988  CN 61-1394/TH
创刊：1976年
汽车实用技术

汽车实用技术 ›› 2023, Vol. 48 ›› Issue (18): 78-81.DOI: 10.16638/j.cnki.1671-7988.2023.018.016

• 测试试验 • 上一篇    

中冷后进气温度对重型柴油机 NOX排放 性能的影响分析

焦文健，田 刚，叶平雄，胡克容，张靳杰   

  1. 中汽研汽车检验中心（武汉）有限公司
  • 出版日期:2023-09-30 发布日期:2023-09-30
  • 通讯作者: 焦文健
  • 作者简介:焦文健（1991－），男，硕士，工程师，研究方向为发动机排放测试，E-mail:jiaowenjian@catarc.ac.cn。

Effect Analysis of Intercooled Inlet Temperature on NOX Emission Performance of Heavy Duty Diesel Engine

JIAO Wenjian, TIAN Gang, YE Pingxiong, HU Kerong, ZHANG Jinjie   

  1. CATARC Automotive Inspection Center (Wuhan) Company Limited
  • Online:2023-09-30 Published:2023-09-30
  • Contact: JIAO Wenjian

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摘要： 中冷后进气温度是影响选择性催化还原（SCR）转化效率的重要因素。文章以一台某 厂家重型柴油机为研究对象，在发动机台架测试系统上运行世界统一瞬态循环（WHTC）工 况，通过全流稀释采样系统（CVS）检测排气中原机 NOX 排放值以及 SCR 催化器后的 NOX 排放值。结果表明，当排气温度为 42～62 ℃时，提高中冷后进气温度能够有效提高增压中 冷柴油机的排气温度，但也使得原始排气中的 NOX 排放值增大；排气温度的提升使得 SCR 的转化效率得以提升，但由于原始排气中 NOX 排放值的增大，SCR 的转化效率呈现先增大后 减少的趋势。

关键词: 重型柴油机；CVS；NOX 排放性能；中冷后进气温度

Abstract: The temperature of intercooled inlet is an important factor affecting the conversion efficiency of selective catalytic reduction (SCR). Taking a heavy duty diesel engine from a certain manufacturer as the research object, world harmonized transient cycle (WHTC) working condition is run on the engine bench test system, and the NOX emission of the engine in exhaust and that of the SCR catalytic converter are detected by constant volume sampling system (CVS) full-current dilution sampling system in this paper. The results show that when the intercooled inlet temperature is in 42～62 ℃, the exhaust temperature of supercharged and intercooled diesel engine can be effectively improved by increasing the inlet temperature of intercooled diesel engine, but it also increases the NOX emission in the original exhaust, and the increase of exhaust temperature improves the conversion efficiency of SCR. However, due to the increase of NOX emission in the original exhaust,the conversion efficiency of SCR first increases and then decreases.

Key words: Heavy duty diesel engine; CVS; NOX emission performance; Intercooled inlet temperature