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Integrated Exhaust Manifold Design & Optimization of it through HCF and LCF Simulations for a BS6 Compliant Diesel Engine
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 01, 2021 by SAE International in United States
Annotation ability available
Event: International Conference on Advances in Design, Materials, Manufacturing and Surface Engineering for Mobility
This paper discusses design and optimization process for the integration of exhaust manifold with turbocharger for a 3 cylinder diesel engine, simulation activities (CAE and CFD), and validation of manifold while upgrading to meet current BS6 emissions. Exhaust after-treatment system needs to be upgraded from a simple DOC (Diesel Oxidation Catalyst) to a complex DOC+sDPF (Selective catalytic reduction coated on Diesel Particulate Filter) to meet the BS6 emission norms for this engine. To avoid thermal losses and achieve a faster light-off temperature in the catalyst, the exhaust after-treatment (EATS) system needs to be placed close to the engine - exactly at the outlet of the turbocharger. This has given to challenges in packaging the EATS. The turbocharger in case of BS4 is placed near the 2nd cylinder of the engine, but this position will not allow placing the BS6 EATS. Hence, the turbocharger position must be shifted to such an extent that it is placed before the first cylinder resulting in an overhanging design. This needed sufficient design optimization through CAE and CFD simulations. CFD simulations are performed to predict the surface temperatures of the manifold using conjugate heat transfer (CHT) analysis. HCF and LCF simulations were performed to optimize the wall thickness and merging radii given along with the stiffening ribs in the exhaust manifold. The overhang design of turbocharger posed a challenge in sealing the exhaust manifold and cylinder head joinery, this has been optimized using CAE simulations. The paper also discusses the correlation between simulation and validation results. The finalized design has been validated on both engine testbed and vehicle successfully.
Citationvinaya murthy, v., NAMANI, P., Vellandi, V., and Rengaraj, C., "Integrated Exhaust Manifold Design & Optimization of it through HCF and LCF Simulations for a BS6 Compliant Diesel Engine," SAE Technical Paper 2021-28-0168, 2021, https://doi.org/10.4271/2021-28-0168.
- Vellandi , V. and NAMANI , P. An Extensive Optimization Methodology to Validate the Exhaust After-Treatment System of a BS VI Compliant Modern Diesel Engine SAE Technical Paper 2020-28-0483 2020 https://doi.org/10.4271/2020-28-0483
- D'Ambrosio , S. , Ferrari , A. , Spessa , E. , Magro , L. et al. Impact on Performance, Emissions and Thermal Behavior of a New Integrated Exhaust Manifold Cylinder Head Euro 6 Diesel Engine SAE Int. J. Engines 6 3 2013 https://doi.org/10.4271/2013-24-0128
- Hazime , R.M. , Dropps , S.H. and Anderson , D.H.
- Delprete , C. and Rosso , C. Exhaust Manifold Thermo-Structural Simulation Methodology SAE Technical Paper 2005-01-1076 2005 https://doi.org/10.4271/2005-01-1076
- Yan , Z. , Zhien , L. , Wang , X. , Zheng , H. et al. Cracking Failure Analysis and Optimization on Exhaust Manifold of Engine with CFD-FEA Coupling SAE Int. J. Passeng. Cars - Mech. Syst. 7 2 2014 https://doi.org/10.4271/2014-01-1710
- Patterson , E. , Goldasteh , I. , and Maaita , S. Conjugate HeatTransfer and Thermo-Mechanical Heat Cycle Analysis of an Automotive Exhaust Muffler System SAE Technical Paper 2015-01-0327 2015 https://doi.org/10.4271/2015-01-0327
- Eroglu , S. , Duman , I. , Ergenc , A. , and Yanarocak , R. Thermal Analysis of Heavy Duty Engine Exhaust Manifold Using CFD SAE Technical Paper 2016-01-0648 2016 https://doi.org/10.4271/2016-01-0648
- Luo , X. , Zou , P. , Zeng , X. , Yuan , X. et al. Failure Prediction and Design Optimization of Exhaust Manifold based on CFD and FEM Analysis SAE Technical Paper 2020-01-1166 2020 https://doi.org/10.4271/2020-01-1166