柴油车固体SCR系统运行及NOx排放特性研究

刘明; 何超; 李加强; 刘学渊; 彭琪凯; 邹浪

doi:10.3969/j.issn.1001-2222.2019.01.009

车用发动机 ›› 2019, Vol. 0 ›› Issue (1) : 53-57. DOI: 10.3969/j.issn.1001-2222.2019.01.009

栏目

柴油车固体SCR系统运行及NO_x排放特性研究

刘明，何超，李加强，刘学渊，彭琪凯，邹浪

作者信息 +

Solid SCR System Operation and NOx Emission Characteristics of Diesel Vehicle

LIU Ming，HE Chao，LI Jiaqiang，LIU Xueyuan，PENG Qikai，ZOU Lang

Author information +

文章历史 +

摘要

利用汽车尾气实时监控平台获得了装有固体SCR系统柴油环卫车运行38天共135万条有效实时工况数据和排放数据，分析了固体SCR对柴油车NO_x排放的影响规律。研究结果表明：柴油车城市中行驶平均速度13.45 km/h，90%以上加速度点在±1.5 m/s2范围内波动。该柴油车NO_x平均质量浓度为0.023 g/s，NO_x平均排放因子为4.17 g/km。随着速度升高，NO_x转化率逐渐升高。随着排气温度升高，NO_x转化率逐渐升高，后逐渐趋于平稳，在平均排气温度低于150 ℃时，NO_x平均转化率为61%，表明其能较大程度改善柴油车在排气温度低时的NO_x排放。

Abstract

A total of 1.35 million effective realtime working and emission data within 38 days for diesel sanitation vehicle with solid SCR system were acquired by using the realtime monitoring platform of automobile exhaust gas. The results show that diesel vehicle runs at an average speed of 13.45 km/h and 90% of acceleration points fluctuates within ±1.5 m/s².The average mass concentration of NO_x is 0.023 g/s and its average emission factor is 4.17 g/km. The NO_xconversion rate increases with the increase of vehicle velocity and increases and then becomes stable with the increase of exhaust temperature. When the average exhaust temperature is lower than 150 ℃，the average conversion rate of NO_x is 61%. Accordingly, the solid SCR system can greatly reduce NO_x emissions of diesel vehicles at low exhaust temperature.

导出引用

刘明，何超，李加强，刘学渊，彭琪凯，邹浪. 柴油车固体SCR系统运行及NO_x排放特性研究[J]. 车用发动机. 2019, 0(1): 53-57 https://doi.org/10.3969/j.issn.1001-2222.2019.01.009

LIU Ming，HE Chao，LI Jiaqiang，LIU Xueyuan，PENG Qikai，ZOU Lang. Solid SCR System Operation and NOx Emission Characteristics of Diesel Vehicle[J]. Vehicle Engine. 2019, 0(1): 53-57 https://doi.org/10.3969/j.issn.1001-2222.2019.01.009