This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Turbulence Intensity Calculation from Cylinder Pressure Data in a High Degree of Freedom Spark-Ignition Engine
Technical Paper
2010-01-0175
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
The number of control actuators available on spark-ignition engines is rapidly increasing to meet demand for improved fuel economy and reduced exhaust emissions. The added complexity greatly complicates control strategy development because there can be a wide range of potential actuator settings at each engine operating condition, and map-based actuator calibration becomes challenging as the number of control degrees of freedom expand significantly. Many engine actuators, such as variable valve actuation and flow control valves, directly influence in-cylinder combustion through changes in gas exchange, mixture preparation, and charge motion. The addition of these types of actuators makes it difficult to predict the influences of individual actuator positioning on in-cylinder combustion without substantial experimental complexity. To simplify this experimental task a data processing routine is developed that quickly estimates in-cylinder turbulence intensity in a production-style engine from commonly employed measurements. Calculation of turbulence intensity is described, the data are validated using a quasi-dimensional spark-ignition engine combustion model, and the results are discussed. Results are in good agreement with well-established models for early-combustion conditions, and the new technique proves capable of discerning small changes in engine operation. The experimental data are then used to develop a simple control-oriented turbulence intensity prediction model that could be used for model-based ignition timing prediction algorithms. The control-oriented model is capable of quickly and accurately producing turbulence intensity estimates for variations in engine speed, load, ignition timing, valve overlap, and charge motion control valve activation state. Conclusions are drawn and the prospects of using these techniques for model-based engine control applications are discussed.
Recommended Content
Authors
Topic
Citation
Prucka, R., Lee, T., Filipi, Z., and Assanis, D., "Turbulence Intensity Calculation from Cylinder Pressure Data in a High Degree of Freedom Spark-Ignition Engine," SAE Technical Paper 2010-01-0175, 2010, https://doi.org/10.4271/2010-01-0175.Also In
SI Combustion and Direct Injection SI Engine Technology, 2010
Number: SP-2278; Published: 2010-04-13
Number: SP-2278; Published: 2010-04-13
References
- Blizard, N.C. Keck, J.C. “Experimental and Theoretical Investigation of Turbulent Burning Model for Internal Combustion Engines,” SAE Technical Paper 740191 SAE Transactions 86 1974
- Tabaczynski, R.J. Ferguson, C.R. Radhakrishnan, K. “A Turbulent Entrainment Model for Spark-Ignition-Engine Combustion,” SAE Technical Paper 770647 1977
- Tabaczynski, R. Trinker, F. Shannon, B. “Further Refinement and Validation of a Turbulent Flame Propagation Model for Spark Ignition Engines,” Combustion and Flame 39 111 121 1980
- Poulos, S.G. Heywood, J.B. “The Effect of Chamber Geometry on Spark-Ignition Engine Combustion,” SAE Technical Paper 830334 1983
- 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 Technical Paper 910075 , SAE Transactions . 100 1991
- Filipi, Z. Assanis, D. “The Effect of the Stroke-to-Bore Ratio on Combustion, Heat Transfer and Efficiency of a Homogenous Charge Spark Ignition Engine of Given Displacement,” Int. Journal of Engine Research 1 2 191 208 2000
- Asmus, T.W. “Perspectives on Applications of Variable Valve Timing,” SAE Technical Paper 910445 1991
- Stein, R.A. Galietti, K.M. Leone, T.G. “Dual Equal VCT - A Variable Camshaft Timing Strategy for Improved Fuel Economy and Emissions,” SAE Technical Paper 950975 1995
- Leone, T.G. Christenson, E.J. Stein, R.A. “Comparison of Variable Camshaft Timing Strategies at Part Load,” SAE Technical Paper 960584 1996
- Prucka, R.G. Filipi, Z.S. Assanis, D.N. Kramer, D.M. et al. “An Evaluation of Residual Gas Fraction Measurement Techniques in a High Degree of Freedom Spark Ignition Engine,” SAE Int. J. Engines 1 1 71 84 2008
- Fox, J.W. Cheng, W.K. Heywood, J.B. “A Model for Predicting Residual Gas Fraction in Spark-Ignition Engines,” SAE Technical Paper 931025 1993
- Sellnau, M. Sinnamon, J. Oberdier, L. Dase, C. et al. “Development of a Practical Tool for Residual Gas Estimation in IC Engines,” SAE Technical Paper 2009-01-0695 2009
- Goldwitz, J.A. Heywood, J.B. “Combustion Optimization in a Hydrogen-Enhanced Lean-Burn SI Engine,” SAE Technical Paper 2005-01-0251 2005
- Russ, S. Thiel, M. Lavoie, G. “SI Engine Operation with Retarded Ignition: Part 2 -HC Emissions and Oxidation,” SAE Technical Paper 1999-01-3507 1999
- Heywood J.B “Internal Combustion Engine Fundamentals” McGraw-Hill, Inc. New York 1988
- Bracco, F.V. “Structure of Flames in Premixed-Charge IC Engines,” Combust. Sci. and Tech. 58 209 230 1988
- Winsor, R.E. Patterson, D.J. “Mixture Turbulence - A Key to Cyclic Variation,” SAE Technical Paper 730086 , SAE Transactions 82 368 383
- Dent, J.C. Salama, N.S. “The Measurement of the Turbulence Characteristics in an Internal Combustion Engine Cylinder,” SAE Technical Paper 750886 1975
- Liou, T.-M. Hall, M. Santavicca, D. Bracco, F. “Laser Doppler Velocimetry Measurements in Valved and Ported Engines,” SAE Technical Paper 840375 , SAE Transactions 93 1984
- Hall, M.J. Bracco, F.V. “A Study of Velocities and Turbulence Intensities Measured in Firing and Motored Engines,” SAE Technical Paper 870453 SAE Transactions 1987
- zur Loye, A.O. Siebers, D.L. McKinley, T.L. Ng, H.K. et al. “Cycle-Resolved LDV Measurements in a Motored Diesel Engine and Comparison with K-ε Model Predictions,” SAE Technical Paper 890618 , SAE Transactions 98 1989
- Reuss, D.L. “Cyclic Variability of Large-Scale Turbulent Structures in Directed and Undirected IC Engine Flows,” SAE Technical Paper 2000-01-0246 2000
- Funk, C. Sick, V. Reuss, D.L. Dahm, W.J.A. “Turbulence Properties of High- and Low-Swirl In-Cylinder Flows,” SAE Technical Paper 2002-01-2841 2002
- Tennekes, M. Lumley, J.L. A First Course in Turbulence MIT Press Cambridge, Massachusets 1972
- Munson, B. Young, D. Okiishi, T. “Fundamentals of Fluid Mechanics 4th John Wiley & Sons, Inc. Hoboken 2002
- Wong, V.W. Hoult, D.P. “Rapid Distortion Theory Applied to Turbulent Combustion,” SAE Technical Paper 790357 1979
- Durbin, P. Zeman, O. “Rapid Distortion Theory for Homogeneous Compressed Turbulence with Application to Modelling,” J. Fluid Mechanics 242 349 370 1992
- Turns, S. “An Introduction to Combustion: Concepts and Applications, 2nd Edition” McGraw-Hill Boston 2000
- Rassweiler, G.W. Withrow, L. “Motion Pictures of Engine Flames Correlated with Pressure Cards,” SAE Technical Paper 380139 , SAE Transactions 42 1938
- Mansouri, S.H. Heywood, J.B. Radhakrishnan, K. “Divided-Chamber Diesel Engine, Part 1: A Cycle-Simulation Which Predicts Performance and Emissions,” SAE Technical Paper 820273 1982
- Abraham, J. Williams, F.A. Bracco, F.V. “A Discussion of Turbulent Flame Structure in Premixed Charges,” SAE Technical Paper 850345 1985