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Development and Optimization of a Small-Displacement Spark-Ignition Direct-Injection Engine - Full-Load Operation
Technical Paper
2004-01-0034
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Full-load operation of a small-displacement spark-ignition direct-injection (SIDI) engine was thoroughly investigated by means of computational analysis and engine measurements. The performance is affected by many different factors, which can be grouped as those pertaining to volumetric efficiency, to mixing and stratification, and to system issues, respectively. Volumetric efficiency is affected by flow losses, tuning and charge cooling. Charge cooling due to spray vaporization is often touted as the most significant benefit of direct-injection on full-load performance. However, if wall wetting occurs, this benefit may be completely negated or even reversed. The fuel-air mixing is strongly affected by the injection timing and characteristics at lower engine speeds, while at higher engine speeds the intake flow dominates the transport of fuel particles and resultant vapor distribution. A higher injector flow rate enhances mixing especially at higher engine speeds. The design of the intake ports is critical not only to optimize the through-flow but also to create a suitable in-cylinder flow that optimizes mixing. At lower speeds swirl may be used to enhance mixing and increase the torque. Using a flat piston provided little or no benefit relative to a bowl-in-piston except at high speeds, even though the mixture distribution showed differences at lower speeds. The combustion characteristics are significantly affected not only by the global mixture distribution but also by the local equivalence ratio in the vicinity of the spark plug. Global stratification adversely affects the knock propensity of the combustion system, which may be exacerbated if the charge cooling benefit of direct-injection is negated by wall impingement. By optimizing the various components of direct-injection full-load performance, a significant improvement was obtained relative to the initial baseline configuration, and the expected gains in torque and power over an equivalent PFI engine achieved.
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Lippert, A., El Tahry, S., Huebler, M., Parrish, S. et al., "Development and Optimization of a Small-Displacement Spark-Ignition Direct-Injection Engine - Full-Load Operation," SAE Technical Paper 2004-01-0034, 2004, https://doi.org/10.4271/2004-01-0034.Also In
References
- Houston, R. Cathcart, G. “Combustion and Emissions Characteristics of Orbital's Combustion Process Applied to multi-Cylinder Automotive Direct Injected 4-stroke Engines,” SAE Paper 980153 1998
- Harada, J. Tomita, T. Mizuno, H. Mashiki, Z. Ito, Y. “Development of Direct Injection Gasoline Engine,” SAE Paper 970540 1997
- Krebs, R. Spiegel, L. Stiebels, B. “Direct Injection SI Engines by Volkswagen,” The Aachen Colloquium on Automotive and Engine Engineering 1999
- Iwamoto, Y. Noma, K. Nakayama, O. Yamauchi, T. Ando, H. “Development of Gasoline Direct Injection Engine,” SAE Paper 970541 1997
- Geiger, J. Grigo, M. Lang, O. Wolters, P. Hupperich, P. “Direct Injection Gasoline Engines - Combustion Design,” SAE Paper 1999-01-0170 1999
- Lippert A. M. El Tahry S. H. Huebler M. S. Parrish S. E. Inoue H. Noyori T. Nakama K. Abe T. “Development and Optimization of a Small-Displacement Spark-Ignition Direct-Injection Engine - Stratified Operation,” submitted to SAE Congress 2004 , Paper Offer 04P-123 2004
- Alkidas, A.C. “Intake-Valve Temperature and the Factors Affecting It,” SAE Paper 971729 1997
- Voss, E. Schnittger, W. Königstein, A. Scholten, I. Pöpperl, M. Pritze, S. Rothenberger, P. Samstag, M. “2.2L ECOTEC DIRECT - The New All-Aluminium Engine With Gasoline Direct Injection for the Opel Signum,” 24 th International Vienna Engine Symposium 2003
- Tagaki, Y. Itoh, T. Muranaka, S. Iiyama, A. Iwakiri, Y. Urushihara, T. Naitoh, K. “Simultaneous Attainment of Low Fuel Consumption, High Output Power and Low Exhaust Emissions in Direct Injection SI Engines,” SAE Paper 980149 1998
- Kanda, M. Baika, T. Kato, S. Iwamuro, M. Koike, M. Saito, A. “Application of a New Combustion Concept to Direct Injection Gasoline Engine,” SAE Paper 2000-01-0531
- Yang, J. Anderson, R.W. “Fuel Injection Strategies to Increase Full-Load Torque Output of a Direct-Injection SI Engine,” SAE Paper 980495 1998
- Ortmann, R. Würfel, G. Grzeszik, R. Raimann, J. Samenfink, W. Schlerfer, J. Expert Verlag 130 146 2001
- Han, Z. Reitz, R.D. Claybaker, P. Rutland, C.J. Yang, J. Anderson, R.W. “Modeling the Effects of Intake Flow Structures on Fuel/Air Mixing in a Direct-Injected Spark-Ignition Engine,” SAE Paper 961192 1996
- Han, Z. Reitz, R.D. Yang, J. Anderson, R.W. “Effects of Injection Timing on Air-Fuel Mixing in a Direct-Injection Spark-Ignition Engine,” SAE Paper 970625 1997
- Yi, J. Han, Z. Yang, J. Anderson, R.W. Trigui, N. Boussarar, R. “Modeling of the Interaction of Intake Flow and Fuel Spray in DISI Engines,” SAE Paper 2000-01-0656 2000
- Naitoh, K. Takagi, Y. Kuwahara, K. “Numerical Optimization of the Fuel Mixing Process in a Direct-Injection Gasoline Engine,” SAE Paper 981440 1998
- Wallesten, J. Lipatnikov, A. Chomiak, J. “Simulations of Fuel/Air Mixing, Combustion, and Pollutant Formation in a Direct Injection Gasoline Engine,” SAE Paper 2002-01-0835 2002
- Khalighi B. El Tahry S. H. Haworth D.C. Huebler M.S. “Computation and Measurement of Flow and Combustion in a Four-Valve Engines with Intake Variations, and Combustion in a Four-Valve Engines with Intake Variations,” SAE Paper 950287 1995
- Amsden, A.A. O'Rourke, P.J. Butler, T.D. “KIVA: A Computer Program for Two - and Three - Dimensional Fluid Flows with Chemical Reactions and Fuel Sprays,” Los Alamos Report No. LA-11560-MS 1989
- O'Rourke, P.J. Amsden, A.A. “A Particle Numerical Model for Wall Film Dynamics in Port-Injected Engines” SAE Paper 961961 1996
- O’Rourke, P.J. Amsden, A.A. “A Spray/Wall Interaction Submodel for the KIVA-3V Wall Film Model” SAE Paper 2000-01-0271 2000
- Stanton, D. Rutland, C. “Modeling Fuel Film Formation and Wall Interaction in Diesel Engines” SAE Paper 960628 1996
- Lippert, A. M. Reitz, R.D. “Modeling of multicomponent fuels using continuous distributions with application to droplet evaporation and sprays” SAE Paper 972882 1997
- Lippert, A.M Stanton, D.W. Reitz, R.D. Rutland, C.J Hallett, W.L.H. “Investigating the Effect of Spray Targeting and Impingement on Diesel Engine Cold Start” SAE Paper 2000-01-0269 2000
- El Tahry, S.H. “A Turbulence Combustion Model for Premixed Charge Engines,” Combustion & Flame 79 122 140 1990
- Magnussen, B.F. Hjertager, B. H. “On Mathematical Modelling of Turbulent Combustion with Special Emphasis on Soot Formation and Combustion,” Sixteenth Syposium (International) on Combustion The Combustion Institute 1976
- Blint, W. “Relationship of Laminar Flame Width to Flame Speed,” Combustion Science and Technology 49 1986
- Blint, W. “Calculated Dependance of Flame Speed and Flame Width on Pressure,” Complex Chemical Reaction Systems Mathematical Modeling and Simulation Warnatz, J Jager, W. Springer-Verlag Berlin 1987
- Blint, R. Tsai, P.-H. “C3H8-Air-N2 Laminar Flames Calculated for Stratified IC Engine Conditions,” 27th Symposium (International) on Combustion The Combustion Institute Boulder, Colorado Aug. 2 1998
- WAVE Engine Manual, Ricardo Software Ricardo Inc. 2001
- Steeper, R. Stevens, E. “Characterization of Combustion, Piston Temperatures, Fuel Sprays, and Fuel-Air Mixing in a DISI Optical Engine,” SAE Paper 2000-01-2900 2000
- VanderWege, B. Hochgreb, S. “Effects of Fuel Volatility and Operating Conditions on Fuel Sprays in DISI Engines: (1) Imaging Investigation,” SAE Paper 2000-01-0535 2000
- VanderWege, B. Hochgreb, S. “Effects of Fuel Volatility and Operating Conditions on Fuel Sprays in DISI Engines: (2) PDPA Investigation,” SAE Paper 2000-01-0536 2000
- Zuo, B. Gomes, A.M. Rutland, C.J. 2000 “Modeling Superheated Fuel Sprays and Vaporization,” Int. J. Engine Research 1. 4 321 336
- O’Rourke P. J. Amsden A. A. “The TAB Method for Numerical Calculation of Spray Droplet Breakup,” SAE Paper 872089 1987
- Noda, T. Iriya, Y. Naitoh, K. Mitsumoto, H. Iiyama, A. “Effects of Fuel and Air Mixing on WOT Output in Direct Injection Gasoline Engines,” SAEJ 9740307 1997
- Alger, T. Hall, M. Matthews, R. “Effects of In-Cylinder Flow on Fuel Concentration at the Spark Plug, Engine Performance and Emissions in a DISI Engine,” SAE Paper 2002-01-0831 2002
- Lake, T.H. Stokes, J. Whitaker, P.A. Crump, J.V. “Comparison of Direct Injection Gasoline Combustion Systems,” SAE Paper 980154 1998
- Shayler, P.J. Jones, S.T. Horn, G. Eade, D. “DISI Engine Spark and Fuel Injection Timings: Effects, Compromise and Robustness,” SAE Paper 2001-01-3672 2001
- Matsubara, K. Shima, Y. Okumi, M. Asabatake, K. Fujikawa, T. “Analysis of mixture formation process in a stoichiometric direct injection gasoline engine,” SAE Paper 2003-01-0066 2003
- Stanglmaier, R.H. Roberts, C.E. Moses, C.A. “Vaporization of Individual Fuel Drops on a Heated Surface: A Study of Fuel-Wall Interactions within Direct-Injection Gasoline Engines,” SAE Paper 2002-01-0838
- Tatsuta, H. Matsumura, M. Yajima, J. Nishide, H. “Development of a New Direct-Injection SI V-6 Engine,” SAEJ 9831117 1998
- Philipp, H. Hirsch, A. Baumgartner, M. Fernitz, G. Beidl, C. Piock, W. Winklhofer, E. “Localization of Knock Events in Direct Injection Gasoline Engines,” SAE Paper 2001-01-1199 2001
- Abe, S. Sasaki, K. Baika, T. Nakashima, T. Fujishiro, O. “Combustion Analysis on Piston Cavity Shape of a Gasoline Direct Injection Engine,” SAE Paper 2001-01-2029 2001