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A Mean Value Model of the Exhaust System with SCR for an Automotive Diesel Engine
ISSN: 0148-7191, e-ISSN: 2688-3627
Published September 13, 2009 by Consiglio Nazionale delle Ricerche in Italy
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Nowadays requirements towards a reduction in fuel consumption and pollutant emissions of Internal Combustion Engines (ICE) keep on pushing manufacturers to improve engines performance through the enhancement of existing subsystems (e.g.: electronic fuel injection, air systems) and the introduction of specific devices (e.g.: exhaust gas recirculation systems, SCR, …). Modern systems require a combined design and application of different after-treatment devices. Mathematical models are useful tools to investigate the complexity of different system layouts, to design and to validate (HIL/SIL testing) control strategies for the after-treatment management.
This study presents a mean value model of an exhaust system with SCR; it has been coupled with a common rail diesel engine combustion black box model (Neural Network based). So, dedicated models for exhaust pipes, oxidation catalyst, diesel particulate filter and selective catalytic converter are developed. With this model a simulation study on a DOC-DPF-SCR exhaust system is performed, showing a good coherence with experimental data. This model has been intended as a flexible tool to perform the simulation of exhaust system behaviour for after-treatment control and diagnostic strategies development as well as system architecture analysis. On light-duty drive cycle, the behaviour of the after-treatment system applied to an Euro 5 B-segment vehicle is evaluated. The simulations have highlighted the necessity of accurate SCR control strategies to improve the warm-up phase and optimize reactant dosing.
- Federico Covassin - Powertrain Division — Magneti Marelli S.p.A. — Bologna (Italy)
- Mario Preziuso - Powertrain Division — Magneti Marelli S.p.A. — Bologna (Italy)
- Matteo De Cesare - Powertrain Division — Magneti Marelli S.p.A. — Bologna (Italy)
- Gabriele Serra - Powertrain Division — Magneti Marelli S.p.A. — Bologna (Italy)
CitationCovassin, F., Preziuso, M., De Cesare, M., and Serra, G., "A Mean Value Model of the Exhaust System with SCR for an Automotive Diesel Engine," SAE Technical Paper 2009-24-0131, 2009, https://doi.org/10.4271/2009-24-0131.
- Fiorani, P.Gambarotta, A.Lucchetti, G.Ausiello, F.P.De Cesare, M.Serra, G. “A detailed Mean Value Model of the exhaust system of an automotive Diesel engine”, SAE Technical Paper 2008-28-0027, 2008.
- Serra, G.Ponti, F.Corti, E.De Cesare, M. “Common Rail Multi-Jet Diesel engine combustion model development tor control purposes”, SAE paper no.2007-01-0383, 2007.
- Arsie, I.Marotta, F.Pianese, C.Rizzo, G. “Information Based Selection of Neural Networks Training Data for S.I. Engine Mapping”, SAE Paper 2001-01-0561, 2001.
- Madia, G.S. “Measures to enhance the NOx conversion in urea-SCR systems for automotive applications”, Swiss Federal Institute of Technology of Zurich, 2002.
- King, Russell T. “Design of a Catalytic Reduction system to reduce NOx emissions of the 2003 West Virginia University Future Truck”, West Virginia University, 2007.
- Wurzenberger, J.C.Wanker, R.Schüβler, M. “Simulation of Exhaust Gas Aftertreatment Systems — Thermal Behaviour During Different Operating Conditions”, SAE Technical Paper 2008-01-0865, 2008.
- Arrègle, J.López, J.J.Guardiola, C.Monin, C. “Sensitivity Study of a NOx Estimation Model for On-Board Applications”, SAE Technical Paper 2008-01-0640, 2008.
- Devarakonda, M. Parker, G. Johnson, J. H. “Model-Based Estimation and Control System Development in a Urea-SCR Aftertreatment System”, SAE Technical Paper 2008-01-1324, 2008.
- Heywood, J. B. “Internal Combustion Engine Fundamental”, McGraw Hill, 1988.
- Covassin, F. “Controllo di un Exhaust System con SCR, analisi delle architetture di sistema e studio della logica di controllo e gestione”, Tesi di Master (Master Thesis), Università degli studi di Modena e Reggio Emilia, 2008.
- Preziuso, M. “Controllo di un Exhaust System con SCR, analisi e studio dell'efficienza di conversione e della temperatura di lavoro del catalizzatore”, Tesi di Master (Master Thesis), Università degli studi di Modena e Reggio Emilia, 2008.