This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Multi-Dimensional Modeling of Mixing and Combustion of a Two-Stroke Direct-Injection Spark Ignition Engine
Technical Paper
2001-01-1228
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Event:
SAE 2001 World Congress
Language:
English
Abstract
Multi-Dimensional modeling was carried out for a Mercury Marine two-stroke DISI engine. Recently developed spray, ignition, and combustion models were applied to medium load cases with an air-fuel ratio of 30:1. Three injection timings, 271, 291 and 306 ATDC were selected to investigate the effects of the injection timing on mixture formation, ignition and combustion. The results indicate that at this particular load condition, earlier injection timing allows more fuel to evaporate. However, because the fuel penetrates further toward the piston, a leaner mixture is created near the spark plug; thus, a slower ignition process with a weaker ignition kernel was found for the SOI 271 ATDC case. The measured and computed combustion results such as average in-cylinder pressure and NOx are in good agreements. The later injection case produces lower NOx emission and higher CO emission; this is due to poor mixing and is in agreement with experimental measurements.
Recommended Content
Authors
Topic
Citation
Fan, L. and Reitz, R., "Multi-Dimensional Modeling of Mixing and Combustion of a Two-Stroke Direct-Injection Spark Ignition Engine," SAE Technical Paper 2001-01-1228, 2001, https://doi.org/10.4271/2001-01-1228.Also In
References
- Abata, D. 1985 “A Review of The Stratified Charge Engine Concept,” Alternative Engines
- Anderson, R. W. Yang, J. Brehob, D. D. Vallance, J. K. Whiteaker, R. M. 1996 “Understanding the Thermodynamics of Direct Injection Spark Ignition (DISI) Combsution Systems: An Analytical and Experimental Investigation,” SAE 962018
- Casarella, M. “Th Effects of Spray characteristics on Combustion and Emissions Performance of a Two-Stroke Direct-Injection Engine,” University of Wisconsin - Madison
- Dombrowski, N. Johns, W. R. 1963 “The Aerodynamic Instability and Disintegration of Viscous Liquid Sheets,” Chem. Eng. Sci 18 203
- Fan, L. Li, G. Han, Z. Reitz, R. D. “Modeling Fuel Preparation and Stratified Combustion in a Gasoline Direct Injection Engine,” SAE 1999-01-0175
- Fan, L. Reitz, R.D. “Development of an Ignition and Combustion Model for Spark-Ignition Engines,” SAE 2000-01-2809
- Harada, J. Tomita, T. Mizuno, H. Mashiki, Z. Ito, Y. 1997 “Development of Direct Injection Gasoline Engine,” SAE 970540
- Hudak, E. “Time-Resolved Exhaust Measurements of a Two-Stroke Direct-Injection Engine,” University of Wisconsin - Madison
- Han, Z. Parrish, S. E. Farrell, P. V. Reitz, R. D. 1997 “Modeling Atomization Process of Pressure-Swirl Hollow-Cone Fuel Sprays” Atomization and Sprays
- Han, Z. Fan, L. Reitz, R. D. 1997 “Multidimensional Modeling of Spray Atomization and Air-Fuel Mixing in a Direct-Injection Spark-Ignition Engine,” SAE paper 970884
- Kume, T. Iwamoto, Y. Iida, K. Akishino, K. Ando, H. 1996 “Combustion Control Technologies for Direct Injection SI Engine,” SAE 960600
- Lofgren, D. J. 1995 “Modeling of a Two-Stroke Engine Scavenging Cycle with KIVA -2×3: Numerical Evaluation and Boundary Condition Development,” University of Wisconsin-Madison
- O'Rourke P. J. Amsden, A. A. 1987 “Three Dimensional Numerical Simulation of the UPS-292 Stratified Charge Engine,” SAE 870597
- Takagi, Y. 1998 “A New Era in Spark Ignition Engines Featuring High Pressure Direct Injection,” Keynote Speech at the 27 th International Symposium on Combustion