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Calibration and Parametric Investigations on Lean NOx Trap and Particulate Filter Models for a Light Duty Diesel Engine
ISSN: 0148-7191, e-ISSN: 2688-3627
To be published on April 14, 2020 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
To comply with the stringent future emission mandates of light-duty diesel engines, it is essential to deploy a suitable combination of emission control devices like diesel oxidation catalyst (DOC), diesel particulate filter (DPF) and DeNOx converter (LNT or SCR). Arriving at optimum size and layout of these emission control devices for a particular engine through experiments is both time and cost-intensive. Thus, it becomes important to develop suitable well-tuned simulation models that can be helpful to optimize individual emission control devices as well as arrive at an optimal layout for achieving higher conversion efficiency at a minimal cost.
Towards this objective, the present work intends to develop a one-dimensional Exhaust After Treatment Devices (EATD) model using a commercial code. The model parameters are fine-tuned based on experimental data. The EATD model is then validated with experiment data that are not used for tuning the model. Subsequently, the model was used for studying the effects of geometrical parameters of the after-treatment devices like diameter and length on the conversion efficiency and the pressure drop. The experimental investigations are done in a single-cylinder light-duty diesel engine currently used in Indian market fitted with a Lean NOx Trap (LNT), Diesel Oxidation Catalyst (DOC) and Diesel Particulate Filter (DPF). From the Indian Driving Cycle (IDC) cycle, 8 representative operating conditions were chosen and experiments were conducted at steady state at these conditions. The chemical kinetic parameters, friction loss and heat transfer coefficient of the one-dimensional model were tuned using five of the 8 experimental data sets. The remaining three data sets were used to validate the predictions with no further tuning. The model could predict the conversion efficiency, pressure drop and outlet temperature with better accuracy. The calibrated model was then used to predict the effect of geometrical parameters. The effects of varying length and diameter of the EATD were studied with this calibrated model. The results obtained show that increasing the diameter is more effective than increasing the length for enhanced conversion efficiency and reduced pressure drop across LNT. For LNT, increasing the diameter by 5% and reducing the length by 10% compared to the existing design, results in a 1% reduction in volume, an 11% increase in pressure drop with 1.6% higher conversion efficiency. For cDPF, increasing the diameter by 10% and reducing the length by 10% results in a 9% increase in volume, a 17% reduction in pressure drop with 1.5% higher conversion efficiency. Thus, the current model and methodology can be used for optimizing the size of EATD.
CitationBagavathy, S., Ramesh, A., Krishnasamy, A., and Pandian, S., "Calibration and Parametric Investigations on Lean NOx Trap and Particulate Filter Models for a Light Duty Diesel Engine," SAE Technical Paper 2020-01-0657, 2020.
Data Sets - Support Documents
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- Heuser, P., Ghetti, S., and Rathod, D. , “Bharat Stage VI Solutions for Commercial Engines for the India Market,” SAE Technical Paper 2005-01-0971, 2005, doi:https://doi.org/10.4271/2005-01-0971.
- Guthenke, A., Chatterjee, D., and Weibl, M. , “Modeling and Simulation of Heterogeneous Catalytic Reactions,” Adv.Chem. Eng 33:104-211, 2008.
- Al-Harbi, M., Hayes, R., Votsmeier, M., and Epling, W.S. , “Competitive NO, CO and Hydrocarbon Oxidation Reactions Over a Diesel Oxidation Catalyst,” The Canadian Journal of Chemical Engineering 90:1527-1538.
- Pre-Defined Kinetic Models, AVL BOOST After treatment User Guide, 2016.
- Nilsen, C., Schram, J. et al , “Evaluation of Test Bench Engine Performance Measurements in Relation to Vehicle Measurements on Chassis Dynamometer,” ASME Technical Paper ICEF 2015-1019, 2015, doi:8-11-2015.
- Olsson, L. and Andersson, B. , “Kinetic Modelling in Automotive Catalysis,” Topics in Catalysis 28(1-4):89-98, Apr 2004.
- Gao, Z., Chakravarthy, K., Daw, C., and Conklin, J. , “Lean NOx Trap Modeling for Vehicle Systems Simulations,” SAE Technical Paper 2001-01-0882, 2001, doi:https://doi.org/10.4271/2001-01-0882.
- Lapuerta, M., Oliva, F., and Martínez-Martínez, S. , “Modeling of the Soot Accumulation in DPF under Typical Vehicle Operating Conditions,” SAE Technical Paper 2010-01-2097, 2010, doi:https://doi.org/10.4271/2010-01-2097.
- Kallenbach, J. and Flörchinger, P. , “Modelling of Automotive aftertreatment Calatysts,” SAE Technical Paper 1999-01-3043, 1999, doi:https://doi.org/10.4271/1999-01-3043.
- Stamatelos, A.M., Koltsakis, G.C., Kandylas, I.P., and Pontikakis, G.N. , “Computer Aided Engineering in the Development of Diesel Exhaust Aftertreatment Systems,” SAE Technical Paper 1999-01-0458, 1999, doi:https://doi.org/10.4271/1999-01-0458.
- Wurzenberger, J., Wanker, R., and Schubler, M. , “Simulation of Exhaust Gas Aftertreatment Systems -Thermal Behavior During Different Operating Conditions,” SAE Technical Paper 2008-01-0865, 2008, doi:https://doi.org/10.4271/2008-01-0865.
- Indian Driving Cycle, CMVR_TAP_Documents/Part-14/Part-14_Chapter03.pdf.
- Masoudi, M. , “Pressure Drop of Segmented Diesel Particulate Filters,” SAE Technical Paper 2005-01-0971, 2005, doi:https://doi.org/10.4271/ 2005-01-0971.
- Bagavathy, S.S., Ramesh, A., Krishnasamy, A., and Pandian, S. , “Parametric Investigations on the Performance of Diesel Oxidation Catalyst in a Light Duty Diesel Engine - An Experimental and Modelling Study,” SAE Technical Paper 2019-26-0299, 2019, doi:https://doi.org/10.4271/2019-26-0299.
- Andrew, P., Hansen, K., Goguet, A., and Hansen, K. , “Optimization of Kinetic Parameters for an Aftertreatment Catalyst,” SAE Technical Paper 2014-01-2814, 2014, doi:https://doi.org/10.4271/2014-01-2814.
- Surenhalli, H., Premchand, K., Johnson, J., and Parker, G. , “Modelling Study of Active Regeneration of a Catalyzed Particulate Filter Using One-Dimensional DOC and CPF Models,” SAE Technical Paper 2011-01-1242, 2011, doi:https://doi.org/10.4271/2011-01-1242.
- Shamim, T. , “The Effect of Space Velocity on the Dynamic Characteristics of an Automotive Catalytic Converter,” SAE Technical Paper 2005-01-2160, 2005, doi:https://doi.org/10.4271/2005-01-2160.
- Gao, Z., Chakravarthy, K., Daw, C., and Conklin, J. , “Lean NOx Trap Modelling for Vehicle Systems Simulations,” SAE Technical Paper 2010-01-0882, 2010, doi:https://doi.org/10.4271/2010-01-0882.