Development of Injector Closely-Coupled SCR System for Horizontal Inlet Configurations

2014-01-2350

09/30/2014

Event
SAE 2014 Commercial Vehicle Engineering Congress
Authors Abstract
Content
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.
Meta TagsDetails
DOI
https://doi.org/10.4271/2014-01-2350
Pages
6
Citation
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.
Additional Details
Publisher
Published
Sep 30, 2014
Product Code
2014-01-2350
Content Type
Technical Paper
Language
English