This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Steady-State and Transient Operation Simulation of a “Downsized” Turbocharged SI Engine
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 16, 2007 by SAE International in United States
Annotation ability available
The paper reports the research activity related to the development of a “downsized” turbocharged Spark-Ignition (SI) engine. Both experimental and theoretical analyses are carried out to characterize the performance of this engine architecture, and particularly to analyze the matching conditions with the turbocharger and the combustion process at wide-open-throttle conditions. To this aim, a quasi-dimensional model for the simulation of the burning process is included as an external user-defined routine in a commercial 1D simulation code (GT-Power®). The rate of heat release is computed through a two-zone model, based on a “fractal” representation of the turbulent flame front. A turbulence sub-model is included and it is properly tuned with respect to turbulence results computed by a 3D CFD code. A CAD procedure evaluating, at each crank-angle and flame radius, the intersections between the flame surface and the actual combustion chamber walls, is also presented. This allows to take into account the influence of the combustion chamber geometry on flame development and on in-cylinder pressure cycle.
A number of comparisons with experimental results are presented with reference to instantaneous pressure data inside the cylinders. Comparisons with overall test-bench data are also carried out in correspondence to different control strategies of the waste-gate valve. Once validated, the model is finally applied to predict the engine behaviour in transient operation, for different turbocharger groups.
CitationBozza, F., Gimelli, A., Strazzullo, L., Torella, E. et al., "Steady-State and Transient Operation Simulation of a “Downsized” Turbocharged SI Engine," SAE Technical Paper 2007-01-0381, 2007, https://doi.org/10.4271/2007-01-0381.
- Shahed M.R., “Engine Downsizing and Boosting for CO2 Emission Reduction”, presented at International Vehicle Technology Symposium, March11-13, 2003
- Police G., Diana S., Giglio V., Iorio B., Rispoli N., “Downsizing of SI Engines by Turbo-Charging”, ESDA2006-95215, Proceedings of ESDA2006, 8th Biennial ASME Conference on Engineering Systems Design and Analysis, July4-7, 2006, Torino, Italy.
- Stokes J., Lake T. H. and Osborne R. J., Engine A Gasoline“Concept for Improved Fuel Economy -The Lean Boost System”, SAE paper 2000-01-2902.
- Fontana G., Galloni E., “ Knock Resistance in a Small Turbocharged Spark-Ignition Engine”, International Session - The Sustainable Mobility Challenge - of 61st ATI 2006 Congress, SAE n. 2000-01-2995.
- Bozza F., Gimelli A., Pianese V., De Martino S., Curion R., “A Procedure for the Design of an Intake System: 1D Analysis and Experimental Validation”, SAE Transaction, Journal of Passenger Cars-Mechanical Systems, Vol .6, ISBN: 0-7680-1555-3 pp. 172-180, 2005.
- Bozza F., Gimelli A., Senatore A., Caraceni A., “A Theoretical Comparison of Various VVA Systems for Performance and Emission Improvements of SI Engines”, SAE Paper 2001-01-0671, 2001, also in “Variable Valve Actuation 2001”, SAE SP-1599, ISBN 0-7680-0746-1.
- Bozza F., Gimelli A., Tuccillo R., “The Control of a VVA Equipped SI-Engine Operation by Means of 1D Simulation and Mathematical Optimization”, SAE 2002 Transactions, Journal of Engines, Section 3 -Volume 111, pp. 1790-1801.
- Bozza F., Gimelli A., Siano D., Torella E., Mastrangelo G., “A Quasi-Dimensional Three-Zone Model for Performance and Combustion Noise Evaluation of a Twin-Spark High-EGR Engine”, SAE 2004 Transaction, Journal of Engines - section 3, vol. 113-3, pp. 491-501, ISBN 0-7680-1552-9, 2005.
- Bozza F., Gimelli A., Merola S. S., Vaglieco B. M., “Validation of A Fractal Combustion Model through Flame Imaging”, SAE 2005 Transaction, Journal of Engines - section 3, vol. 114-3, pp. 973-987, ISBN 0-7680-1689-4, 2006.
- Onorati A., Ferrari G., Montenegro G., Caraceni A., Pallotti P., “Prediction of S.I. Engine Emissions During An Ece Driving Cycle Via Integrated Thermo-Fluid Dynamic Simulation”SAE Paper 2004-01-1001, SAE World Congress, Detroit, March2004, also in “Modeling of Spark-Ignition Engines”, SAE SP-1830, ISBN 0-7680-1366-6.
- Baratta M., Catania A.E., Spessa E., Vassallo A., “Development of an Improved Fractal Model for the Simulation of Turbulent Flame Propagation in SI Engines”ICE 2005, SAE PAPER n. 2005-24-082.
- Fontana GustavoGalloni EnzoPalmaccio RobertoTorella Enrico“Numerical Analysis of a Small Turbo-Charged Spark-Ignition Engine”, ICES2006-1336, ASME/ICE Spring Technical Conference2006, Aachen.
- Bozza F.“Further Insights in the Quasi-Dimensional Modeling of the Turbulent Combustion in SI Engines”, proceedings of the 2005 AVL AST user meeting, Graz, June2005.
- Bozza F., Gimelli A., Russo F., Torella E., Strazzullo L.Mastrangelo G. (2005). “Application of a Quasi-Dimensional Combustion Model to the Development of a High-EGR VVT SI Engine”. 7th International Conference ICE05 Internal Combustion Engines: Experiments and Modeling.September2005. Capri (NA) - Italy. Proceedings distributed on CD-ROM. ISBN Number: 88-900399-2-2.
- Poulos S.G., Heywood J.B., “The Effect of Chamber Geometry on Spark-Ignition Engine Combustion”, SAE paper 830334, 1983.
- Mantzaras J., Felton P. G., Bracco F. V., “Three-Dimensional Visualization of premixed-Charge Engine Flames: Islands of Reactants and Products; Fractal Dimensions; and Homogeneity”, SAE Paper 881635, 1988.
- Schubert C., Wimmer A., Chmela F., “Advanced Heat Transfer Model for CI Engines”SAE Paper 2005-01-0695, SAE World Congress, Detroit, April 2005, also in Modeling of SI and Diesel Engines”, pagg. 165-178, SAE SP-1969, ISBN 0-7680-1614-2. Also published on SAE 2005 Transactions, Journal of Engines.
- Matthews R.D., and Chin Y.W., “A Fractal-Based SI Engine Model: Comparisons of Predictions with Experimental Data”, SAE Paper 910075, 1991.
- Baratta M., Catania A.E., Spessa E., Vassallo A., “Flame Propagation Speed in S.I. Engines: Modeling and Experimental Assessment”, ASME Paper No. ICEF2005-1216, 2005.
- Bozza F., Gimelli A.,. (2005). “A Comprehensive 1D Model for the Simulation of a Small-Size Two-Stroke SI Engine”. SAE paper 2004-01-0999, also in SAE 2004 Transactions, Journal of Engines. Journal Code: E184774. ISSN: 0096-736X. July2005.
- GT-Power, User's Manual and Tutorial, GT-SUITE ™ Version 6.1, Gamma Technologies.