This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Comparison of Measured and Predicted Combustion Characteristics of a Four-Valve S.I. Engine
Annotation ability available
Sector:
Language:
English
Abstract
An S.I. combustion model has been developed for application in phenomenological engine simulations. The model is based on a turbulent flame concept, linked to an in-cylinder flow and turbulence calculation. The flame front is assumed to spread from the spark plug and propagate through the cylinder, while interacting with the combustion chamber geometry. The model predictions were compared to combustion rate measurements made in a single cylinder four valve passenger car engine. The data spanned a wide range of operating conditions, from an idle timing sweep, to part load EGR and mixture ratio sweeps, to a wide open throttle speed sweep. The results of the comparisons showed a generally good agreement. Some difficulties were encountered at idle, where cycle-to-cycle variability makes modeling difficult especially at early timing settings. Also, some improvements can still be made in refining the geometrical representation of the combustion chamber, which affects the predicted shapes of the heat release curves.
Recommended Content
Authors
Topic
Citation
Wahiduzzaman, S., Moral, T., and Sheard, S., "Comparison of Measured and Predicted Combustion Characteristics of a Four-Valve S.I. Engine," SAE Technical Paper 930613, 1993, https://doi.org/10.4271/930613.Also In
References
- ABDEL-GAYED, R. G. BRADLEY, D. 1985 “Criteria for Turbulent Propagation Limits of Premixed Flames” Combustion and Flame 62 61 68
- BLIZARD, N. C. KECK, J. C. 1974 “Experimental and Theoretical Investigation of Turbulent Burning Model for Internal Combustion Engines” SAE Paper No. 740191
- HIRES, S. D. TABACZYNSKI, R. J. NOVAK, J. M. 1978 “The Prediction of Ignition Delay and Combustion Intervals for a Homogeneous Charge, Spark Ignition Engine” SAE Paper 780232
- MOREL, T. KERIBAR, R. 1985 “A Model for Predicting Spatially and Time Resolved Convective Heat Transfer in Bowl-in-Piston Combustion Chambers” SAE Paper 850204
- MOREL, T. KERIBAR, R. BLUMBERG, P. N. FORT, E. F. 1986 “Examination of Key Issues in Low Heat Rejection Engines” SAE Paper 860316
- MOREL, T. WAHIDUZZAMAN S. TREE D. R. DEWITT, D. P. 1987 “Effect of Sped, Load and Location on Heat Transfer in a Diesel Engine - Measurements and Predictions” SAE Paper 870154
- MOREL, T. RACKMIL, C. I KERIBAR, R. JENNINGS, M. J. 1988 “Model for Heat Transfer and Combustion in Spark Ignited Engines and Its Comparison with Experiments SAE Paper No. 880198
- MOREL,, T. KERIBAR, R. BLUMBERG, P. N. 1988 “A New Approach to Integrating Engine Performance and Component Design Analysis Through Simulation” SAE Paper 880131
- MOREL, T. FLEMMING, M. F. LAPOINTE, L. A. 1990 “Characterization of Manifold Dynamics in the Chrysler 2.21 S.I. Engine by Measurements and Simulations” SAE Paper 900679
- MOREL, T. MOREL, J. BLASER, D. A. 1991 “Fluid-Dynamic and Acoustic Modeling of Concentric-Tube Resonators/Silencers” SAE Paper 910072
- RHODES, D. B. KECK, J. C. 1985 “Laminar Burning Speed Measurements of Indolene-Air-Diluent Mixtures at High Pressures and Temperatures” SAE Paper No. 850047
- RICHARDS, V. C. M. SAPSFORD, S. M. MOREL, T. AMLEE, D. R. CHAPPELL, M. 1992 “Exhaust System Evaluation and Design by Non-Linear Modeling” SAE Paper 920686
- TABACZYNSKI, R. J. THINKER, F. H. SHANNON, B. A. S. 1980 ‘Further Refinement and Validation of a Turbulent Flame Propagation Model for Spark-Ignition Engines” Combustion and Flame 39