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Development of Injector Closely-Coupled SCR System for Horizontal Inlet Configurations
Technical Paper
2014-01-2350
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
In order to satisfy China IV emissions regulations, a unique design concept was proposed with injector closely coupled with Selective Catalytic Reduction (SCR) system outer body. The benefit of this design is significant in cost reduction and installation convenience. One paper was published to describe the vertical inlet layout [1]; this work is the second part describing applications of this concept to horizontal inlet configurations. For horizontal inlet pipe, two mixing pipe designs were proposed to avoid urea deposit and meet EU IV emission regulations. Computational Fluid Dynamics (CFD) technique was used to evaluate two design concepts; experiments were performed to validate both designs.
CFD computations and experiments give the same direction on ranking of the two decomposition tubes. With the straight decomposition pipe design and unique perforated baffle design, no urea deposits were found; in addition, the emission level satisfied EU IV regulations. Modeling of acoustic insertion loss with GT-Power was implemented and correlated with the tests, the resulting system insertion loss is higher than 20 dB under the rated engine load condition, meeting the acoustic performance targets.
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Zhao, Z., Zheng, G., Wang, F., Zhang, S. et al., "Development of Injector Closely-Coupled SCR System for Horizontal Inlet Configurations," SAE Technical Paper 2014-01-2350, 2014, https://doi.org/10.4271/2014-01-2350.Also In
References
- Zheng , G. , Wang , F. , Zhang , S. , Zhang , J. et al. Development of Compact SCR Systems with Closely Coupled Injector Configurations SAE Technical Paper 2014-01-1546 2014 10.4271/2014-01-1546
- EPA Regulatory Standards http://epa.gov/diesel
- Oesterle , J. , Calvo , S. , Damson , B. , Neumann , F. et al. SCR Technology with Focus to Stringent Emissions Legislation SAE Technical Paper 2008-01-2640 2008 10.4271/2008-01-2640
- Xu , L. , Watkins , W. , Snow , R. , Graham , G. et al. Laboratory and Engine Study of Urea-Related Deposits in Diesel Urea-SCR After-Treatment Systems SAE Technical Paper 2007-01-1582 2007 10.4271/2007-01-1582
- Zheng , G. , Fila , A. , Kotrba , A. , and Floyd , R. Investigation of Urea Deposits in Urea SCR Systems for Medium and Heavy Duty Trucks SAE Technical Paper 2010-01-1941 2010 10.4271/2010-01-1941
- Zheng , G. , Sampath , M. , Alcini , W. , Salanta , G. et al. Design Improvements of Urea SCR Mixing for Medium-Duty Trucks SAE Technical Paper 2013-01-1074 2013 10.4271/2013-01-1074
- Fluent methodology manual 2007
- Stiesch , G. Modeling Engine Spray and Combustion Processes Springer-Verlag Berlin 2003
- Zheng G. , Lacin F. and Kotrba A. Development of a light vehicle diesel aftertreatment system with DOC DPF and urea SCR International Journal of Powertrains 3 1 2014