基于国六标准工况的甲醇增程式发动机N2O和NH3排放特性研究

刘冰; 吴滴; 张超; 熊卫东; 闫少锋

doi:10.3969/j.issn.1001-2222.2023.04.007

车用发动机 ›› 2023, Vol. 0 ›› Issue (4) : 42-46. DOI: 10.3969/j.issn.1001-2222.2023.04.007

栏目

基于国六标准工况的甲醇增程式发动机N2O和NH3排放特性研究

刘冰¹，吴滴¹，张超¹，熊卫东¹，闫少锋²

作者信息 +

Emission Characteristics of Methanol Extended-Range Engine Based on China Ⅵ Regulation Conditions

LIU Bing¹,WU Di¹,ZHANG Chao¹,XIONG Weidong¹,YAN Shaofeng²

Author information +

文章历史 +

摘要

以一台国六甲醇增程式发动机为研究对象，搭建排放测试系统，进行了重型车国六阶冷热态WHTC循环试验，研究了标准循环工况下N₂O和NH₃的排放特性。研究表明：甲醇发动机原机排放中N₂O和NH₃排放极低，但使用三元催化后处理系统后，N₂O和NH₃的排放量会大幅增加；WHTC循环中，N₂O排放较高的区域集中在排气温度为400 ℃左右的低温段，且从高转速变化为低转速时会形成N₂O排放值，而在高温阶段几乎没有N₂O排放；WHTC循环中，NH₃排放主要集中在排温500~550 ℃区间内，在低于500 ℃的低温段和高于550 ℃的高温段排放量极低，且循环平均NH₃排放热态明显高于冷态。

Abstract

For a China Ⅵ methanol extendedrange engine, the emission measurement system was built and the China Ⅵ cold and hot WHTC test for heavyduty vehicle was carried out, and theN₂O and NH₃ emission characteristics were researched. The results show that the N₂O and NH₃ emission of original engine is extremely low, but will greatly increase after using the three-way catalytic aftertreatment system. In WHTC cycle, the high N₂O emission concentrates in the low temperature stage of about 400 ℃ exhaust temperature and reaches the peak when the speed changes from high to low, while there is little N₂O emission in the high temperature stage. NH₃ emission mainly concentrates in the temperature range of 500~550 ℃ and becomes rare in the temperature section below 500 ℃ and above 550 ℃.Besides, the cycle average NH₃ emission in the hot state is significantly higher than that in the cold state.

导出引用

刘冰，吴滴，张超，熊卫东，闫少锋. 基于国六标准工况的甲醇增程式发动机N2O和NH3排放特性研究[J]. 车用发动机. 2023, 0(4): 42-46 https://doi.org/10.3969/j.issn.1001-2222.2023.04.007

LIU Bing,WU Di,ZHANG Chao,XIONG Weidong,YAN Shaofeng. Emission Characteristics of Methanol Extended-Range Engine Based on China Ⅵ Regulation Conditions[J]. Vehicle Engine. 2023, 0(4): 42-46 https://doi.org/10.3969/j.issn.1001-2222.2023.04.007