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The Directstart: Investigation of Mixture Formation by Means of Optical Measurements and 3D-CFD-Simulation
Technical Paper
2005-01-3686
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This paper focuses onto mixture formation issues of the Directstart of a gasoline direct injection engine.
Regarding the starterless Directstart, i.e. an engine start through targeted injection and ignition timing without the help of an electrical starter, engine tests show that there exists a large room for improvements by attending the mixture formation of the first combustion.
The conditions for the first combustion are very unusual: ambient pressure, nearly the same fuel, engine and charge temperature, no piston movement and only spray induced turbulence. Furthermore, engine tests show that the mixture formation changes with the engine temperature.
This paper analyzes the mixture formation of the first combustion for different engine conditions by means of engine measurements and both optical measurements in a spray chamber and simulations performed by the fast response 3D-CFD-Tool QuickSim of IVK/FKFS. In particular, the differences between single and multiple injections are evaluated.
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Citation
Zuelch, C., Kulzer, A., Chiodi, M., and Bargende, M., "The Directstart: Investigation of Mixture Formation by Means of Optical Measurements and 3D-CFD-Simulation," SAE Technical Paper 2005-01-3686, 2005, https://doi.org/10.4271/2005-01-3686.Also In
References
- Kulzer A. „BDE-Direktstart: Startoptimierung eines Ottomotors mit Direkteinspritzung mittels eines thermodynamischen Motorsimulationsmodells” University of Stuttgart 2004
- Gerhardt J. Kassner U. Kulzer A. Sieber U. Laubender J. „Der Ottomotor mit Direkteinspritzung und Direktstart - Möglichkeiten und Grenzen” 24 Wiener Motorensymposium 2003
- Kulzer A. Zülch C. Mößner D. Eichendorf A. Knopf M. Bargende M. 2003
- Settles G.S. „Schlieren and Shadowgraph Techniques: Visualizing Phenomena in Transparent Media” Springer Verlag 2001
- Preussner C. Döring C. Fehler S. Kampmann S. „GDI: Interaction Between Mixture Preparation, Combustion and Injector Performance” SAE Paper 980498 1998
- Ipp W. Wagner V. Krämer H. Wensing M. Leipertz A. Arndt S. Jain A.K. „Spray Formation of High Pressure Swirl Gasoline Injectors Investigated by Two-Dimensional Mie and LIEF Techniques” SAE Paper 1999-01-0498 1999
- VanDerWege B.A. „Effects of Fuel Volatility and Operating Conditions on Fuel Sprays in DISI Engines: (1) Imaging Investigation” SAE Paper 2000-01-0535 2000
- Schmitz I. Ipp W. Leipertz A. „Flash Boiling Effects on the Development of Gasoline Direct-Injection Engine Sprays” SAE Paper 2002-01-2661 2002
- Brown R. „Sprays Formed by Flashing Liquid Jets” University of Michigan 1960
- Brown R. York J. L. „Sprays Formed by Flashing Liquid Jets” A.I.Ch.E. Journal 8 2 1962 149 153
- Oza R.D. „On the Mechanism of Flashing Injection of Initially Subcooled Fuels” Journal of Fluids Engineering 106 1984 105 109
- Lienhard J.H. Stephenson J. M. „Temperature and Scale Effects upon Cavitation and Flashing in Free and Submerged Jets” Journal of Basic Engineering June 1966 525 532
- Lienhard J.H. „An Influence of Superheat Upon the Spray Configurations of Superheated Liquid Jets” Journal of Basic Engineering September 1966 685 687
- Lienhard J.H. Day J.B. „The Breakup of Superheated Liquid Jets” Journal of Basic Engineering September 1970 515 521
- Araneo L. Coghe A. Brunello G. Dondé R. „Effects of Fuel Temperature and Ambient Pressure on a GDI Swirled Injector Spray” SAE Paper 2000-01-1901 2000
- VanDerWege B.A. „Effects of Fuel Volatility and Operating Conditions on Fuel Sprays in DISI Engines: (2) PDPA Investigation” SAE Paper 2000-01-0536 2000
- Yamazaki N. Miyamoto N. Murayama t. „The Effects of Flash Boiling Injection on Spray Characteristics, Combustion and Engine Performance in DI and IDI Diesel Engines” SAE Paper 850071 1985
- VanDerWege B.A. Lounsberry T.H. Hochgreb S. „Numerical Modeling of Fuel Sprays in DISI Engines under Early-Injection Operating Conditions” SAE Paper 2000-01-0273 2000
- Sher E. Elata C. „Spray Formation from Pressure Cans by Flashing” Ind. Eng. Chem. Process Des. Dev. 16 2 1977
- Nagai N. Sato k. Lee Ch.W. „Atomisation Characteristics of Superheated Liquid Jets” 1985
- Oza R.D. Sinnamon J.F. „An Experimental and Analytical Study of Flash-Boiling Fuel Injection” SAE Paper 830590 1983
- VanDerWege B.A. „The Effects of Fuel Volatility and Operating Conditions on Sprays from Pressure-Swirl Fuel Injectors” Massachusetts Institute of Technology 1999
- Williams P.A. O'Donoghue S. Anderson R.W. Richardson S.H. „An Experimental Study of the Spray Characteristics of Pressure-Swirl Atomizers for DISI Combustion Systems” SAE Paper 2001-01-1974 2001
- Davy M. Williams P. 3-8169-1822-0 1999
- Chiodi M. Berner H.-J. Bargende M. „Investigation on Mixture Formation and Combustion Process in a CNG-Engine by Using a Fast Response 3D-CFD-Simulation” SAE Paper 2004-01-3004 2004
- Badami M. Bevilacqua V. Millo F. Chiodi M. Bargende M. „GDI Swirl Injector Spray Simulation: a Combined Phenomenological-CFD Approach” SAE Paper 2004-01-3005 2004
- Zuarini A. Chiodi M. Bargende M. “Numerical Analysis of Combustion Process in Four-Strokes Spark Ignition Engines” Universität Stuttgart 2002
- Chiodi M. Bargende M. “Improvement of Engine Heat-Transfer Calculation in the Three-Dimensional Simulation Using a Phenomenological Heat-Transfer Model” SAE-Paper 2001-01-3601
- N.N. “Star-CD User Manual Version 3.15” Computational Dynamics Ltd. London 2002