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Design and optimization of exhaust gas aftertreatment system for a heavy-duty diesel engine

重型柴油机废气后处理系统的设计和优化

  • The 2nd World Congress on Internal Combustion Engines
  • Published:
Journal of Central South University Aims and scope Submit manuscript

Abstract

Diesel engines meeting the latest emission regulations must be equipped with exhaust gas aftertreatment system, including diesel oxidation catalysts (DOC), diesel particulate filters (DPF), and selective catalytic reduction (SCR). However, before the final integration of the aftertreatment system (DOC+DPF+SCR) and the diesel engine, a reasonable structural optimization of the catalytic converters and a large number of bench calibration tests must be completed, involving large costs and long development cycles. The design and optimization of the exhaust gas aftertreatment system for a heavy-duty diesel engine was proposed in this paper. Firstly, one-dimensional (1D) and three-dimensional (3D) computational models of the exhaust gas aftertreatment system accounting for the structural parameters of the catalytic converters were established. Then based on the calibrated models, the effects of the converter’s structural parameters on their main performance indicators, including the conversion of various exhaust pollutants and the temperatures and pressure drops of the converters, were studied. Finally, the optimal design scheme was obtained. The temperature distribution of the solid substrates and pressure distributions of the catalytic converters were studied based on the 3D model. The method proposed in this paper has guiding significance for the optimization of diesel engine aftertreatment systems.

摘要

符合最新排放标准的柴油机必须配备废气后处理系统,包括柴油机氧化催化剂(DOC)、柴油机微粒过滤器(DPF)和选择性催化还原(SCR)体系。然而,在后处理系统(DOC+DPF+SCR)与柴油机最终集成之前,必须完成对催化转化器的合理结构优化和大量的台架标定试验,涉及的成本大、开发周期长。为此,本文对重型柴油机尾气后处理系统进行设计和优化。首先,建立废气后处理系统的一维(1D)和三维(3D)计算模型,并考虑了催化转化器的结构参数。然后,在标定模型的基础上,研究了催化器的结构参数对其主要性能指标的影响,包括各种废气污染物的转化以及催化器的温度和压降。最后,得到了最佳设计方案。在三维模型的基础上研究了固体基片的温度分布和催化转化器的压力分布。本文提出的方法对柴油机后处理系统的优化具有一定的指导意义。

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Authors and Affiliations

  1. School of Automotive Studies, Tongji University, Shanghai, 201804, China

    Pi-qiang Tan  (谭丕强), Chao-jie Yao  (姚超捷), De-yuan Wang  (王德源), Zhi-yuan Hu  (胡志远) & Di-ming Lou  (楼狄明)

  2. Kailong High Technology Company Limited, Wuxi, 214000, China

    Lei Zhu  (朱磊)

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  1. Pi-qiang Tan  (谭丕强)
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  2. Chao-jie Yao  (姚超捷)
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Contributions

TAN Pi-qiang provided the concept and edited the draft of manuscript. YAO Chao-jie conducted the literature review and wrote the first draft of the manuscript. WANG De-yuan, ZHU Lei, HU Zhi-yuan, and LOU Di-ming edited the draft of manuscript. All authors replied to reviewers’ comments and revised the final version.

Corresponding author

Correspondence to Pi-qiang Tan  (谭丕强).

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Conflict of interest

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Foundation item: Projects(2017YFC0211202, 2017YFC0211301) supported by the National Key R&D Program of China

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Tan, Pq., Yao, Cj., Wang, Dy. et al. Design and optimization of exhaust gas aftertreatment system for a heavy-duty diesel engine. J. Cent. South Univ. 29, 2127–2141 (2022). https://doi.org/10.1007/s11771-022-5081-y

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  • DOI: https://doi.org/10.1007/s11771-022-5081-y

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