This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Monte Carlo Simulation of Cycle by Cycle Variability
Annotation ability available
Sector:
Language:
English
Abstract
One of the characteristics of nominally homogeneous charge spark ignition engines is a pronounced variation in the combustion rate from cycle to cycle. Many theories have been advanced which attempt to explain the fundamental origin for differences on a cyclic basis. In the present work, some of the suspected causes or their manifestations have been incorporated into Ford's engine combustion model with the intention of determining if their impact on the combustion rate is as theorized. It has been found that initial spark kernel burn rate, the displacement of the spark kernel from the spark plug gap, and the turbulence intensity must all be perturbed simultaneously on a cycle-by-cycle basis to cause the cycle simulation program to mimic the experimentally determined burn parameters with respect to their averages and distributions.
Recommended Content
Book | Introduction to Internal Combustion Engines, Third Edition |
Authors
Citation
Brehob, D. and Newman, C., "Monte Carlo Simulation of Cycle by Cycle Variability," SAE Technical Paper 922165, 1992, https://doi.org/10.4271/922165.Also In
References
- Bianco Y. Cheng W.K. Heywood J.B. “The Effects of Initial Flame Kernel Conditions on Flame Development in SI Engine,” SAE Paper 912402 1991
- Blizard N.C. Keck J.C. “Experimental and Theoretical Investigation of Turbulent Burning Model for Internal Combustion Engines,” SAE Paper 740191 1974
- Borgnakke Davis G.C. Tabaczynski R.J. “Predictions of In-Cylinder Velocity and Turbulent Intensity for an Open Chamber Cup-in-Piston Engine,” SAE Paper 810224 also SAE Transactions 90 964 978 1981
- Cole J.B. Swords M.D. “On the Correlation Between Gas Velocity and Combustion Pressure Fluctuations in a Spark-Ignition Engine,” Eighteenth Symposium (International) on Combustion 1837 46 1981
- Curry S. “A Three-Dimensional Study of Flame Propagation in a Spark Ignition Engine,” SAE Paper 630487 also SAE Transactions 71 628 50 1963
- Daneshyar H. Hill P.G. “The Structure of Small-Scale Turbulence and Its Effect on Combustion,” Progress in Energy and Combustion Science 13 1 46 1987
- Davis G.C. Mikulec A. Kent J.C. Tabaczynski R.J. “Modeling the Effect of Swirl on Turbulence Intensity and Burn Rate in S. I. Engines and Comparison with Experiment,” SAE Paper 860325 1986
- Davis G.C. Kent J.C. “Comparison of Model Calculations and Experimental Measurements of the Bulk Cylinder Flow Processes in a Motored Proco Engine,” SAE Paper 790290 1979
- Davis G.C. Tabaczynski R.J. “The Effect of Inlet Velocity Distribution and Magnitude on In-Cylinder Turbulence Intensity and Burn Rate--Model Versus Experiment,” Journal of Engineering for Gas Turbines and Power 110 509 514 1988
- Hamai K. Kawajiri H. Ishizuka T. Nakai M. “Combustion Fluctuation Mechanism Involving Cycle-to-Cycle Spark Ignition Variation Due to Gas Flow Motion in S.I. Engines,” Twenty-First Symposium (International) on Combustion 1986
- Hill P.G. Kapil A. “The Relationship Between Cyclic Variations in Spark-Ignition Engines and the Small Structure of Turbulence,” Combustion and Flame 78 237 47 1989
- Jungbluth G. Noske G. “A Quasidimensional Two Zone Model to Describe the Combustion Process,” Motortechnische Zeitschrift 52 262 267 318 328 1991
- Keck J.C. Heywood J.B. Noske G. “Early Flame Development and Burning Rates in Spark Ignition Engines and Their Cyclic Variability,” SAE Paper 870164 also SAE Transactions 96 1987
- Martin J.K. Witze P.O. Borgnakke C. “Combustion Effects on the Preflame Flow Field in a Research Engine,” SAE Paper 850122 1985
- Matekunas F.A. “Modes and Measures of Cyclic Combustion Variability,” SAE Paper 830337 also SAE Transactions 92 1139 56 1983
- Newman C.E. Stein R.A. Warren C.C. Davis G.C. “The Effects of Load Control with Port Throttling at Idle--Measurements and Analyses,” SAE Paper 890679 1989
- Pischinger S. Heywood J.B. “A Model for Flame Kernel Development a Spark-lgnition Engine,” Twenty-Third Symposium (International) on Combustion 1033 40 1990
- Pischinger S. Heywood J.B. “How Heat Losses to the Spark Plug Electrodes Affect Flame Kernel Development in an SI-Engine,” SAE Paper 900021 also SAE Transactions 99 53 73 1990
- Rassweiler G.M. Withrow L. “Motion Pictures of Engine Flames Correlated with Pressure Cards,” SAE Transactions 33185 204 1938 SAE Paper 800131 1980
- Tabaczynski R.J. Trinker F.H. Shannon B.A.S. “Further Refinement and Validation of a Turbulent Flame Propagation Model for Spark-Ignition Engines,” Combustion and Flame 39 1980
- Winsor R.E. Patterson D.J. “Mixture Turbulence - A Key to Cyclic Combustion Variation,” SAE Paper 730086 also SAE Transactions 82 1973