Nonlinear model predictive control(NMPC) of diesel oxidation catalyst (DOC) outlet temperature for active regeneration of diesel particulate filter (DPF) in diesel engine

被引：16
作者：
Liu, Wenlong [1 ,2 ]
Gao, Ying [1 ,2 ,3 ]
You, Yuelin [1 ,2 ]
Jiang, Changwen [1 ,2 ]
Hua, Taoyi [1 ,2 ]
Xia, Bocong [1 ,2 ]
机构：
[1] Jilin Univ, State Key Lab Automot Simulat & Control, Changchun 130025, Peoples R China
[2] Jilin Univ, Coll Automot Engn, Changchun 130025, Peoples R China
[3] Jilin Univ, Coll Automot Engn, Changchun, Jilin, Peoples R China
来源：
ENERGY | 2024年 / 293卷
基金：
中国国家自然科学基金;
关键词：
Diesel oxidation catalyst; Exhaust gas aftertreatment; Hydrocarbon; Temperature; Luenberger observer; Model predictive control; REDUCTION; SYSTEM;
D O I：
10.1016/j.energy.2024.130658
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
To meet the active regeneration requirements of the diesel particulate filter (DPF), the outlet temperature of the diesel oxidation catalyst (DOC) must be maintained within the range of 585 degrees C-615 degrees C. Firstly, this paper explores the DOC system using a set of partial differential equations that describe the coupled flow and heat transfer of both the gas phase and solid phase carriers. Subsequently, the DOC model is significantly simplified, and the equations are solved based on their characteristics. Secondly, a Luenberger observer is designed, and the appropriate range of values for the observer gain is calculated. By minimizing the cost function and adhering to constraints within a finite prediction horizon, the optimal sequence for injecting hydrocarbon(HC) is determined. Thirdly, in this study, a Worldwide Harmonized Transient Cycle test is conducted on the engine, following the China VI emission standard. The computational results demonstrate that the mean absolute errors of the DOC outlet temperatures obtained from the model prediction and the observer are 0.535 degrees C and 1.994 degrees C, respectively. Finally, a nonlinear model predictive control is implemented to ensure that the DOC outlet temperature can be maintained between 585 degrees C and 615 degrees C.
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页数：16
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