This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Aspects of Mixture Formation and Combustion in GDI Engines
Technical Paper
2000-01-0648
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Event:
SAE 2000 World Congress
Language:
English
Abstract
The internal mixture formation within SI engines using fuel direct injection has a significant potential regarding the reduction of bsfc and pollutant emission. However the short time available for injection and spray distribution, as well as the complexity of the fluid dynamic conditions, amplified in a wide load and speed range, form a different base for the combustion process than using external mixture formation. The intend of the present study is to develop a method for modeling and optimization of mixture formation and combustion using a general approach for the fuel direct injection, which consist in the modulation of the injection rate, independently on the engine speed. In the first stage of modeling, the optimum combination between mixture formation elements as fuel pressure history, injection timing, spray characteristics, injector location or combustion chamber design is of great importance, forming the conditions for the subsequent combustion process. Moreover the interaction between fuel and air flow within the cylinder during the mixture formation is determining for the flame propagation. The model was developed in base of the commercial code FLUENT. Different combinations of fuel quantity, injection timing, fuel/air interaction and engine speed are represented as time- and space- related sequences of mixture formation. The program calibration is made by spray visualization for distinct cases, as a base of reliable simulation in a wide range of parameters.
Authors
Topic
Citation
Stan, C., Guenther, S., Martorano, L., and Tarantino, C., "Aspects of Mixture Formation and Combustion in GDI Engines," SAE Technical Paper 2000-01-0648, 2000, https://doi.org/10.4271/2000-01-0648.Also In
References
- Stan, C. Experimental Analysis of the Fuel Spray Characteristics for DI High Speed Engines Using a Ram Tuned Injection System SAE Paper 972742
- Stan, C. Personnaz, J. Car Hybrid Propulsion Strategy Using an Ultra-Light GDI Two-Stroke Engine SAE Paper 1999-01-2940
- Stan, C. Direct Injection System for SI and CI Engines SAE / Springer Verlag 2000
- Zhao, F. Q. Lai M. C. Harrington, D. L. A Review of Mixture preparation and Combustion Control strategies for Spark Ignited Direct-Injection Gasoline Engines SAE Paper 970542
- Ohsuga, M. Shiraishi, T. Nogi, T. Nakayama, Y. Sukegawa, Y. Mixture Preparation for Direct-Injection SI Engines SAE Paper 970542
- Tomoda, T. Sasaki, S. Sawada, D. Saito, A: Sami, H. Development of Direct Injection Gasoline Engine - Study of a Stratified Mixture Formation SAE Paper 970539
- Harada, J. Tomita, T. Mizuno, H. Mashiki, Z. Ito, I. development of Direct Injection Gasoline Engine SAE Paper 970540
- Jackson, N. S. Stokes, J. Whitacker, P. A. Lake, T. H. Stratified and Homogeneous Charge Operation for the Direct Injection Gasoline Engine - High Power with Low Fuel Consumption and Emissions SAE Paper 970543
- Lebrun, M. Richards, C.W. How to create good models without writing a single line of code International Fluid Power Congress, SIFP 97 Linköping, Sweden May 1997
- Stan, C. Lefebvre, J.-L. Lebrun, M. Development, Modeling and Engine Adaption of a Gasoline Direct Injection System for Scooter Engines SAE Paper 1999-01-3313
- Stan, C. Direct Injection Systems for SI Engines: Concepts and Trends of Development “Direct Injection for Gasoline Engines” Spicher U. Expert Verlag Germany 1999
- Kuo, T.W. Reitz, R.D. Three-Dimensional Computations of Combustion in Premixed-Charge and Direct-Injected Two-Stroke Engines SAE Paper 920425
- Amdsen, A. O'Rourke, P. Butler, D. Meintjes, K. Fansler, T. Comparisons of Computed and Measured Three-Dimensional Velocity Fields in a Motored Two-Stroke Engine SAE Paper 920418
- Diwakar, R. Fansler, T. French, D. Ghandhi, J. Dasch, C. Heffelfinger, D. Liquid and Vapor Fuel Distributions from a Air-Assist Injector - An Experimental and Computational Study SAE Paper 920422
- Franco, A. Martorano, L. Stan, C. Eichert, H. Development of Two-Stroke Engines with Direct Injection SAE Paper 951776
- Franco, A. Martorano, L. Stan, C. Eichert, H. Numerical Analysis of the Performances of a Small Two-Stroke Engine with Direct Injection SAE Paper 960362
- Stan, C. Eichert, H. Martorano, L. Franco, A. Fluid Dynamic Modeling of Gasoline Direct Injection for Compact Combustion Chambers SAE Paper 980755
- Stan, C. Eichert, H. Tröger, R. Martorano, L. Bacciottini, C. Franco, A. Concept for Modeling and Optimization of the Mixture Formation using Gasoline Direct Injection in Compact High Speed Engines SAE Paper 1999-01-2935
- FLUENT Inc. FLUENT Program Code, User's Guide Version 4.42 FLUENT Inc. Lebanon, USA 1996
- Grimaldi, C. Postrioti, L. Stan, C. Tröger, R. Analysis Method for the Spray Characteristics of the GDI System with High Pressure Modulation SAE Paper 2000-01-1043