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Engine NOx control of SCR system using sliding mode controller
1
Department of Automobile Engineering, PSG College of Technology, Coimbatore, India
2
Department of Instrumentation and Control Systems Engineering, PSG College of Technology, Coimbatore 641004, India
Submission date: 2026-03-13
Final revision date: 2026-06-03
Acceptance date: 2026-07-06
Online publication date: 2026-08-17
Corresponding author
Karaiellapalayam Palanisamy Devakaran
Department of Automobile Engineering, PSG College of Technology, Coimbatore, India
Department of Automobile Engineering, PSG College of Technology, Coimbatore, India
KEYWORDS
TOPICS
ABSTRACT
The Selective Catalytic Reduction System (SCR) system uses aqueous NH3 and catalyst for reducing the NOx emission emitted by the Compression Ignition (CI) engine exhaust. Due to stringent emission regulations and growing demand for SCR systems, significant improvements in its urea injection strategy and catalyst activity are required, in order to reduce exhaust gas by-products. In this study, an SCR system combined with a Super-Twisting Sliding Mode Controller (STSMC) is employed to regulate the exhaust gases of CI engines. The SCR system is represented by linearized state-space models of third and fourth order. The US06 emission cycle is used to determine the engine exhaust NOx characteristics, which are then fed into the SCR system. According to the simulation results, the fourth order SCR model has a better de-NOx conversion rate and less NH3 slip than the third order SCR model, due to the fast-SCR kinematics.
REFERENCES (27)
1.
Ahmed SF, Raza Y, Mahdi HF, Muhamad WW, Joyo MK, Shah A et al. Review on sliding mode controller and its modified types for rehabilitation robots. 2019 IEEE 6th International Conference on Engineering Technologies and Applied Sciences (ICETAS) 2019 Dec 20, p. 1-8. https://doi.org/10.1109/ICETAS....
2.
Chen P, Wang J. Estimation and adaptive nonlinear model predictive control of selective catalytic reduction systems in automotive applications. J Process Contr. 2016; 40:78-92. https://doi.org/10.1016/j.jpro....
3.
Devarakonda M, Parker G, Johnson JH, Strots V, Santhanam S. Model-based estimation and control system development in a urea-SCR aftertreatment system. SAE Int J Fuels and Lubr. 2009;1(1):646-661. https://doi.org/10.4271/2008-0....
4.
Dziubak T, Ślęzak M. Characteristics of pollutants emitted by motor vehicles and their impact on the environment and engine operation. Combustion Engines. 2025;200(1):37-55. https://doi.org/10.19206/CE-19....
5.
Gambhire SJ, Kishore DR, Londhe PS, Pawar SN. Review of sliding mode based control techniques for control system applications: Int J Dynam Control. 2021;9(1):363-378. https://doi.org/10.1007/s40435....
6.
Gao W, Wang Y, Homaifa A. Discrete-time variable structure control systems. IEEE Trans Ind Electron. 1995;42(2):117-122. https://doi.org/10.1109/41.370....
7.
Han J, Kim T, Jung H, Pyo S, Cho G, Oh Y et al. Improvement of NOx reduction rate of urea SCR system applied for an non-road diesel engine. Int J Automot Technol. 2019;20(6):1153-1160. https://doi.org/10.1007/s12239....
8.
Hassan QH, Al-Abboodi H. Experimental investigation of the impact of methanol-diesel blends on diesel engine emissions and performance. Combustion Engines. 2025;201(2):150-157. https://doi.org/10.19206/CE-20....
9.
Hsieh MF, Wang J. Development and experimental studies of a control-oriented SCR model for a two-catalyst urea-SCR system. Control Eng Pract. 2011;19(4):409-422. https://doi.org/10.1016/j.cone....
10.
Devakaran KP, Jayabalan A. De-NOx conversion of selective catalytic reduction system for diesel engine using dual catalyst coated ceramic monoliths. Int J Chem React Eng. 2023;21(9):1141-1151. https://doi.org/10.1515/ijcre-....
11.
Ko A, Woo Y, Jang J, Jung Y, Pyo Y, Jo H et al. Complementary effects between NO oxidation of DPF and NO2 decomposition of SCR in light-duty diesel engine. J Ind Eng Chem. 2019;80:160-170. https://doi.org/10.1016/j.jiec....
12.
Kuntanapreeda S. Super-twisting sliding-mode traction control of vehicles with tractive force observer. Control Eng Pract.2015;38:26-36. https://doi.org/10.1016/j.cone....
13.
Li Y, Liao J, Xu H, Wu Y, Cai Z, Hu J. Comprehensive experimental analysis of a diesel engine with an electrically heated catalyst and close-coupled SCR during cold/hot WHTC. Appl Therm Eng. 2025;262:125277. https://doi.org/10.1016/j.appl....
14.
Lin Q, Chen P. A simple and effective methodology for estimating urea selective catalytic reduction systems states based on NOx sensor measurement. 2017 American Control Conference (ACC) 2017 May 24 (p. 5367-5372). https://doi.org/10.23919/ACC.2....
15.
Lin Q, Chen P. Model-based analysis and control of SCR using NOx sensor measurements. 2018 Annual American Control Conference (ACC) 2018 Jun 27 (p. 5522-5527). https://doi.org/10.23919/ACC.2....
16.
Liu J, Gao L, Zhang J, Yan F. Super-twisting algorithm second-order sliding mode control for collision avoidance system based on active front steering and direct yaw moment control. Proc Inst Mech Eng D: J Automob Eng. 2021;235(1):43-54. https://doi.org/10.1177/095440....
17.
Ma Y, Wang J. Sliding-mode control of automotive selective catalytic reduction systems with state estimation. Proc Inst Mech Eng D: J Automob Eng. 2020;234(2-3):630-644. https://doi.org/10.1177/095440....
18.
Mouzong FB, Bencherif M, Ayissi MZ. Performance and emissions of a diesel engine fueled by Tiska 68-based synthetic fuel blends. Combustion Engines. 2025;201(2):34-43. https://doi.org/10.19206/CE-20....
19.
Devakaran KP, Jayabalan A. Engine exhaust gas control of selective catalytic system using sliding mode controller. Emiss Control Sci Technol. 2024;10(2):244-254. https://doi.org/10.1007/s40825....
20.
Devakaran KP, Jayabalan A. Investigation of urea selective catalytic reduction system with catalyst coated ceramic monolith. J Ceram Process Res. 2021;22(1):79-85. https://doi.org/10.36410/jcpr.....
21.
Rymaniak Ł, Pielecha J, Ziółkowski M, Sobczak J, Szymlet N. Comparison of pollutant emissions per passenger for public and individual transport. Combustion Engines. 2026;204(1):52-57. https://doi.org/10.19206/CE-21....
22.
Shen B, Li Z, Li J, Kong X, He L, Song J et al. Development of a 1D Urea-SCR system model coupling with wall film decomposition mechanism based on engine bench test data. Energy Procedia. 2017;142:3492-3497. https://doi.org/10.1016/j.egyp....
23.
Song X, Parker G, Johnson JH, Naber J, Pihl J. A modeling study of SCR reaction kinetics from reactor experiments. SAE Technical Paper. 2013-01-1576. 2013. https://doi.org/10.4271/2013-0....
24.
Upadhyay D, Van Nieuwstadt M. Model based analysis and control design of a urea-SCR deNOx aftertreatment system. J Dyn Syst Meas Cont. 2006;128:737-741. https://doi.org/10.1115/1.2234....
25.
Vignesh R, Ashok B. Critical interpretative review on current outlook and prospects of selective catalytic reduction system for De-NOx strategy in compression ignition engine. Fuel. 2020;276:117996. https://doi.org/10.1016/j.fuel....
26.
Xu HT, Luo ZQ, Wang N, Qu ZG, Chen J, An L. Experimental study of the selective catalytic reduction after-treatment for the exhaust emission of a diesel engine. Appl Therma Eng. 2019;147:198-204. https://doi.org/10.1016/j.appl....
27.
You K, Wei L, Jiang K. A fuzzy logic urea dosage controller design for two-cell selective catalytic reduction systems. ISA Trans. 2018;78:21-30. https://doi.org/10.1016/j.isat....
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