不同路线国IV车用重型柴油机非常规排放试验的研究.pdfVIP

  不同路线国IV 车用重型柴油机非常规 排放试验研究 史永万，郭红松，陆红雨，王益民，曹磊 中国汽车技术研究中心，天津 300162 【摘要】本文使用AVL 全流采样（CVS ）系统，对3 台国IV 车用重型柴油机进行了ESC 、ETC 循环试验，并利用FTIR 气体分析仪对非常规气体排放进行了测试。通过对比使用不同技术路线（DOC+POC 、DOC+DPF 和SCR ）发动机的NO 、SO 、 2 2 NH3 、HCHO 和NOx 排放，对它们的非常规排放特性进行了研究。研究发现，无论是ESC 循环还是ETC 循环，3 条路线其 CO、HCHO 、NH3 排放依次恶化， NO2 在NOx 排放中的比例依次明显下降；但SCR 路线在油耗和CO2 排放方面相对具有优 势。 【关键词】国IV柴油机，稳态循环，瞬态循环，二氧化氮，氨，甲醛，二氧化硫 中图分类号：TK421 文献标志码：A Contrast of Unregulated Emissions of Chinese IV Heavy-duty Diesel Engines Using Different Technology Routes Yongwan Shi, Hongsong Guo，Hongyu Lu，Yimin Wang ，Lei Cao China Automotive Technology and Research Center, Tianjin 300162 Abstract: Three Chinese IV engines were tested by running ESC and ETC cycles on an AVL engine test bench with Constant Volume Sample System (CVS) in this paper, and unregulated emissions were measured by FTIR equipment. The exhaust characteristic was studied by comparing the NO 、SO 、NH 、HCHO and NO emissions 2 2 3 x of the three engines using different technology routes: DOC+POC, DOC+DPF and SCR. It was found that CO、 HCHO 、NH3 emissions the three technology routes increased, while NO /NOx decreased in turn for both ESC and 2 ETC cycles. But the route with SCR has advantages in CO2 emission and fuel consumption relatively. Key words:, Chinese IV diesel Engine，ESC，ETC，NO ，NH ，HCHO, SO 2 3 2