This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Numerical and Experimental Analysis of Different Combustion Chambers for a Small Spark-Ignition Engine
ISSN: 0148-7191, e-ISSN: 2688-3627
Published June 08, 2004 by SAE International in United States
Annotation ability available
A small spark-ignition engine, in wide spread commercial usage since numerous years, is at present under study with the aim of improving its performance, in terms of a reduction of both fuel consumption and pollutant emissions.
In previous papers, the influence of piston geometry  and intake system  on the combustion process has been evaluated by means of a 3-D computational model. In this paper, a more extensive analysis of the parameters affecting the combustion rate, hence thermal efficiency, pollutant formation and engine stability, has been carried out.
In particular, at ELASIS Research Center, three prototypes featuring different combustion chambers have been realized and analyzed to the aim of assessing the influence of the squish area percentage on the flame front propagating in a quiescent charge.
Furthermore, the AVL FIRE computer code has been utilized in order to simulate the engine behavior at full load operation. The intake, compression and combustion processes have been modeled. The performance of different squish areas have been evaluated varying the flow field at the end of the intake stroke. In this way, a more realistic engine behavior can be investigated and useful information on matching the charge motion generated during induction and during compression can be achieved.
The model results have been validated comparing them to the measured data.
At the end, the purpose of both modeling and experimental activity is to provide guidelines for the development of optimal solutions aimed to improve the combustion process quality and the consequent engine performance.
CitationFontana, G., Galloni, E., Palmaccio, R., and Torella, E., "Numerical and Experimental Analysis of Different Combustion Chambers for a Small Spark-Ignition Engine," SAE Technical Paper 2004-01-1998, 2004, https://doi.org/10.4271/2004-01-1998.
- Fontana G. Galloni E. Palmaccio R. Torella E. “Combustion Modeling for the Development of a Small Spark-Ignition Engine” SAE Paper no. SAE-NA 2003-01-12
- Fontana G. Galloni E. Jannelli E. Palmaccio R. “Influence of the Intake System Design on a Small Spark-Ignition Engine Performance. A Theoretical Analysis” SAE Paper no. 2003-01-3134 2003
- Fontana G. Galloni E. Palmaccio R. “Development of a New Intake System for a Small Spark-Ignition Engine: Modeling the Flow through the Inlet Valve” SAE Paper no. 2003-01-0369 2003
- Heywood J.B. Internal Combustion Engine Fundamentals McGraw-Hill 1988
- Sung N.W. Jun S.P. “The Effect of Combustion Chamber Geometry in a SI Engine” SAE Paper no. 972996 1997
- Jijun L. Deyu W. Longbao Z. “An Experimental Investigation on a New Squish Jet-Turbulence Combustion Chamber for SI Engine” SAE Paper no. 1999-01-3664
- Ueda T. Okumura T. Sugiura S. Kojima S. “Effects of Squish Area Shape on Knocking in a Four-Valve Spark Ignition Engine” SAE Paper no. 1999-01-1494
- Tatschl R. Wieser K. Reitbauer R. “Multidimensional Simulation of Flow Evolution, Mixture Preparation and Combustion in a 4-Valve SI Engine” International Symposium COMODIA 94 Yokohama 1994
- AVL FIRE Handbook, Version 7 April 2000 Internal Report
- Tatschl R. Riediger H. V. Kunsberg Sarre C. Putz N. Kickinger F. “Rapid Meshing and Advanced Physical Modeling for Gasoline DI Engine Application” International Multidimensional Modeling User's Group Meeting at the SAE Congress Detroit 2000
- Duclos J. M. Bruneaux G. Baritaud T. A. “3D modeling of combustion and pollutants in a 4-valve SI engine; effect of fuel and residuals distribution and spark location” SAE paper no. 961964
- Candel, S. Poinsot, T. “Flame stretch and the balance equation for the flame area.” Combustion Science and Technology 1990
- Cheng W. K. Diringer J. A. “Numerical Modeling of SI Engine Combustion with a Flame Sheet Model” SAE Paper 910268 1991
- Choi C. R. Huh K. Y. “Development of a Coherent Flamelet Model for a Spark-Ignited Turbulent Premixed Flame in a Closed Vessel” Combustion and Flame 1998