This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Performance Analysis and Valve Event Optimization for SI Engines Using Fractal Combustion Model
Technical Paper
2006-01-3238
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
On the basis of the newly-developed fractal combustion model, the engine-thermodynamic-cycle simulations were conducted with the 1D engine-cycle-simulation program AVL-BOOST for a passenger-car SI engine with a fully-variable valve train. Results of the simulations showed a good agreement with measurements for both full and part load at various engine speeds. On the basis of the thermodynamic model for the engine, the valve event optimization was carried out for both full and part load with a partial factorial DoE plan consisting of various valve event durations and timings. For each of the selected cases, an independent optimization for the ignition timing was performed to determine the minimum BSFC under a constraint on specified knock criteria. Satisfactory results for the valve event optimization were achieved. The results of the engine performance and the valve event optimization demonstrate that the fractal combustion model is an accurate predictive model and suitable for 1D engine-thermodynamic cycle simulations.
Recommended Content
Authors
Topic
Citation
Regner, G., Teng, H., Van Wieren, P., Park, J. et al., "Performance Analysis and Valve Event Optimization for SI Engines Using Fractal Combustion Model," SAE Technical Paper 2006-01-3238, 2006, https://doi.org/10.4271/2006-01-3238.Also In
References
- Ramos, J.I. Internal Combustion Engine Modeling Hemisphere Publishing Corporation 1989
- Ramos, J.I. “Mathematical Models of Spark-Ignition Engines,” Computer Simulation for Fluid Flow, Heat and Mass Transfer, and Combustion in Reciprocating Engines Markatos N.C. 21 65 Hemisphere Publishing Corporation 1989
- Heywood, J.B. “Engine Combustion Modeling - An Overview,” Combustion Modeling in Reciprocating Engines Mattavi J.N. Amann C.A. 1 38 Plenum Press 1980
- Heywood, J.B. Internal Combustion Engine Fundamentals McGraw-Hill 1988
- Wiebe, I.I. Kraftstoffaufbereitung und Verbrennung bei Dieselmotoren Sitkei G. 156 159 Springer-Verlag 1964
- Poulos, S.G. Heywood, J.B. “The Effect of Chamber Geometry on Spark-Ignition Engine Combustion,” SAE Paper, No.830344 1983
- Morel, T. Rackmil, C.I. Keribar, R. Jennings, M.J. “Model for Heat Transfer and Combustion in a Spark-Ignited Engine and Its Comparison with Experiments,” SAE Paper, No. 880198 1988
- Filipi, Z. Assanis, D.N. “Quasi-Dimensional Computer Simulation of the Turbocharged Spark-Ignition Engine and Its Use for 2- and 4-Valve Engine Matching Studies,” SAE Paper, No. 910075 1991
- Gouldin, F.C. “An Application of Fractals to Modeling Premixed Turbulent Flames,” Combustion and Flame 68 249 266 1987
- Smallwood, G.J. Gulder, O.J. Snelling, D.R. Deschamps, B.M. Gokalp, I. “Characterization of Flame Front Surfaces in Turbulent Premixed Methane/Air Combustion,” Combustion and Flame 101 461 470 1995
- Manzaras, J. Felton, P.G. Bracco, F.V. “Fractal and Turbulent Premixed Engine Flames,” Combustion and Flame 77 295 310 1989
- North, G.L. Santavicca, D.A. “The Fractal Nature of Premixed Turbulent Flames,” Combustion Science and Technology 72 215 232 1990
- Murayama, M. “Fractal-like Character of Flamelets in Turbulent Premixed Combustion,” The Twenty Second Symposium (International) on Combustion/The Combustion Institute 551 559 1988
- Strahle, W.C. Jagoda, J.I. “Fractal Geometry Applications in Turbulent Combustion Data Analysis,” The Twenty Second Symposium (International) on Combustion/The Combustion Institute 561 568 1988
- Gulder, O.L. Smallwood, G.J. Wong, R. Snelling, D.R. Smith, R. Deschamps, B.M. Sautet, J.C. “Flame Front Surface Characteristics in Turbulent Premixed Propane/Air Combustion,” Combustion and Flame 120 407 416 2000
- Matthews, R.D. Chin, Y-W. “A Fractal-Based SI Engine Model: Comparisons of Predictions with Experimental Data,” SAE Paper, No. 910079 Journal of Engines 100 99 117 1991
- Matthews, R.D. Sarwar, M.G. Hall, M.J. Flipe, D.J. Miller, D.L. Cernansky, N.P. “Predictions of Cyclic Variability in an SI Engine and Comparisons with Experimental Data,” SAE Paper, No. 912345 Journal of Engines 100 1747 1760 1991
- Chin, Y.W. Matthews, R.D. Nichols, S.P. Kiehne, T.M. “Use of Fractal Geometry to Model Turbulent Combustion in SI Engines,” Comb. Sci. and Tech. 8 1-6 1 30 1992
- Abraham, J. Williams, F.A. Bracco, F.V. “A Discussion of Turbulent Flame Structure in Premixed Changes,” SAE Paper, No. 850345 1985
- Gulder, O.L. Smallwood, G.J. “Do Turbulent Premixed Flame Fronts in Spark-Ignition Engines Behave Like Passive Surfaces?” SAE Paper, No. 2000-01-1942 2000
- Dober, G.C. Watson, H.C. “Quasi-Dimensional and CFD Modeling of Turbulent and Chemical Flame Enhancement in an Ultra Lean Burn SI Engine,” SAE Paper, No. 2000-01-1263 2000
- 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, No. 2001-01-0670 2001
- Yoshiyama, S. Tomita, E. Zhang, Z. Hamamoto, Y. “Measurement and Simulation of Turbulent Flame Propagation in a Spark Ignition Engine by Using Fractal Burning Model,” SAE Paper, No. 2001-01-3603 2001
- Suzuki, K. Nishiwaki, K. “Fractal Dimension Growth Model for SI Engine Combustion,” SAE Paper, No. 2004-01-1993 2004
- Bozza, F. Gimelli, A. “A Comprehensive 1D Model for the Simulation of a Small-Size Two-Stroke SI Engine,” SAE Paper, No. 2004-01-0999 2004
- Bozza, F. Gimelli, A. Merola, S.S. Baglieco, B.M. “Validation of a Fractal Combustion Model through Flame Imgaging,” SAE Paper, No. 2005-01-1120 2005
- Rhodes, D.B. Keck, J.C. “Laminar Burning Speed Measurements of Indolene-Air-Diluent Mixtures at High Pressures and Temperatures,” SAE Paper, No. 850047 1985
- Schroeder, M. Fractals, Chaos, Power Laws W.H. Freeman and Company 1991
- Tennekes, H. Lumley, J.L. A First Course in Turbulence The MIT Press 1972
- Agarwal, A. Filipi, Z.S. Assanis, D.N. Baker, D.M. “Assessment of Single- and Two-Zone Turbulence Formulations for Quasi-Dimensional Modeling of Spark-Ignition Engine Combustion,” Comb. Sci. and Tech. 136 13 39 1998