Influence of SCR System Structure on Urea Crystallization for China&nbsp;Ⅴ Diesel Engine

FENG Gang1; 2; WANG Fengshuang1; 2; MAO Wei3; BAI Bing3; LANG Junyu1; 2; ZHENG Guanyu1; 2

doi:10.3969/j.issn.1001-2222.2017.06.013

Vehicle Engine >

2017 , Vol. 0 >Issue 6: 65 - 70

DOI: https://doi.org/10.3969/j.issn.1001-2222.2017.06.013

Influence of SCR System Structure on Urea Crystallization for China Ⅴ Diesel Engine

FENG Gang1 ,
2 ,
WANG Fengshuang1 ,
2 ,
MAO Wei3 ,
BAI Bing3 ,
LANG Junyu1 ,
2 ,
ZHENG Guanyu1 ,
2

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（1.State Key Laboratory of Engine Reliability,Wei Fang 261061,China;
2.Weichai Power Emission Solutions Technology Co.,Ltd.,Wei Fang 261061,China; 3.Tenneco(Suzhou) Emission System Co.,Ltd.,Kunshan 215300,China)

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Abstract

For the urea crystallization in SCR system of China Ⅴ commercial diesel vehicle, a series of structure optimization schemes were put forward by using the methods of CFD simulation and bench test. The improved structure ameliorated the flow distribution and flow uniformity as well as urea vapor uniformity. Therefore, the crystallization risk of SCR system was eliminated and it could run normally. In addition, the influences of flow distribution and system structure on urea crystallization were studied by comparing simulation results with bench test data.

Key words： diesel engine; SCR; structure optimization; urea crystallization

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FENG Gang1 , 2 , WANG Fengshuang1 , 2 , MAO Wei3 , BAI Bing3 , LANG Junyu1 , 2 , ZHENG Guanyu1 , 2 . Influence of SCR System Structure on Urea Crystallization for China Ⅴ Diesel Engine[J]. Vehicle Engine, 2017 , 0(6) : 65 -70 . DOI: 10.3969/j.issn.1001-2222.2017.06.013

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