This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Virtual Engine Optimization from Design to Experimentation
ISSN: 0148-7191, e-ISSN: 2688-3627
Published January 10, 2017 by SAE International in United States
Annotation ability available
Virtual modeling of engine and predicting the performance and emissions is now becoming an essential step in engine development for off-road application due to the flexibility in tuning of the combustion parameters and requirement of shorter development times. This paper presents an approach where the test bed calibration time is reduced using virtual techniques, such as 1D thermodynamic simulation and 3D CFD combustion simulation for 4 cylinders TCIC engine complying with Stage IIIA emission norms. 1D thermodynamic simulation has played an important role in the early stage development of an engine for selection of engine sub systems like turbocharger, manifolds, EGR system, valve timings etc. The application of 1D Simulation tool for combustion system development, focusing on NOx emissions for an off road multicylinder mechanical injection diesel engine is discussed. The calibrated model, sensitive to parameters like injection pressures, rate of injection, duration of injection, EGR rate, and compression ratio is developed. The boundary conditions like port pressures and temperatures required for 3D CFD simulation are derived from 1D simulation. A commercial 3D Combustion Simulation tool has potential capabilities in modeling in-cylinder combustion to predict the performance and emissions. Various approaches and strategies performed to develop a family of engines with the assistance of simulations is also discussed. After validating the benchmark engine for the selected load points, combustion simulation has been carried out extensively considering various design parameters like ports, manifolds, bowl shape, EGR and injector parameters, and their interaction effects. Detailed analysis on the dependency of parameters on emission and performance consequently helped in shortlisting the combustion recipe with simulation alone. The hardware selected with above simulation strategies was implemented on proto engine. Initial results indicated a close matching of performance and emission parameters with that predicted from simulation. This has resulted in minimizing efforts and test bed time required for combustion optimization.
- Prashant Pawar - Automotive Research Association of India
- Alen Jose - Automotive Research Association of India
- Hitesh B Chaudhari - Automotive Research Association of India
- Simhachalam Juttu - Automotive Research Association of India
- Nagesh Harishchandra Walke - Automotive Research Association of India
- Neelkanth V Marathe - Automotive Research Association of India
CitationPawar, P., Jose, A., B Chaudhari, H., Juttu, S. et al., "Virtual Engine Optimization from Design to Experimentation," SAE Technical Paper 2017-26-0264, 2017, https://doi.org/10.4271/2017-26-0264.
- Lim , J. and Min , K. The Effects of Spray Angle and Piston Bowl Shape on Diesel Engine Soot Emissions Using 3-D CFD Simulation SAE Technical Paper 2005-01-2117 2005 10.4271/2005-01-2117
- Zhu , Y. , Zhao , H. , Melas , D. , and Ladommatos , N. Computational Study of the Effects of the Re-entrant Lip Shape and Toroidal Radii of Piston Bowl on a HSDI Diesel Engine's Performance and Emissions SAE Technical Paper 2004-01-0118 2004 10.4271/2004-01-0118
- Shi , Y. and Reitz , R. Assessment of Optimization Methodologies to Study the Effects of Bowl Geometry, Spray Targeting and Swirl Ratio for a Heavy-Duty Diesel Engine Operated at High-Load SAE Int. J. Engines 1 1 537 557 2009 10.4271/2008-01-0949
- Husberg , T. , Denbratt , I. , Ringvik , M. , and Engström , J. Heavy-Duty Diesel Combustion with Ultra-Low NOx and SOOT Emissions - A Comparison Between Experimental Data and CFD Simulations SAE Technical Paper 2005-01-0380 2005 10.4271/2005-01-0380
- Converge Theory Manual v2.2
- Ge , H. , Reitz , R. , and Willems , W. Modeling the Effects of In-Cylinder Flows on HSDI Diesel Engine Performance and Emissions SAE Int. J. Fuels Lubr. 1 1 293 311 2009 10.4271/2008-01-0649
- Mobasheri , R. and Peng , Z. Analysis of the Effect of Re-Entrant Combustion Chamber Geometry on Combustion Process and Emission Formation in a HSDI Diesel Engine SAE Technical Paper 2012-01-0144 2012 10.4271/2012-01-0144
- Hountalas , D. , Zannis , T. , and Mavropoulos , G. Potential Benefits in Heavy Duty Diesel Engine Performance and Emissions from the Use of Variable Compression Ratio SAE Technical Paper 2006-01-0081 2006 10.4271/2006-01-0081
- Diwakar , R. and Singh , S. Importance of Spray-Bowl Interaction in a DI Diesel Engine Operating under PCCI Combustion Mode SAE Technical Paper 2009-01-0711 2009 10.4271/2009-01-0711
- Genzale , C. , Reitz , R. , and Wickman , D. A Computational Investigation into the Effects of Spray Targeting, Bowl Geometry and Swirl Ratio for Low-Temperature Combustion in a Heavy-Duty Diesel Engine SAE Technical Paper 2007-01-0119 2007 10.4271/2007-01-0119