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A Computational Study on the Effect of Injector Location on the Performance of a Small Spark-Ignition Engine Modified to Operate under the Direct-Injection Mode
Technical Paper
2020-01-0286
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
In a direct-injection (DI) engine, charge motion and mixture preparation are among the most important factors deciding the performance and emissions. This work was focused on studying the effect of injector positioning on fuel-air mixture preparation and fuel impingement on in-cylinder surfaces during the homogeneous mode of operation in a naturally aspirated, small bore, 0.2 l, light-duty, air-cooled, four-stroke, spark-ignition engine modified to operate under the DI mode. A commercially available, six-hole, solenoid-operated injector was used. Two injector locations were identified based on the availability of the space on the cylinder head. One location yielded the spray-guided (SG) configuration, with one of the spray plumes targeted towards the spark plug. In the second location, the spray plumes were targeted towards the piston top in a wall-guided (WG) configuration so as to minimize the impingement of fuel on the liner. A CFD model was developed and validated using experimental data obtained on the same engine with the SG configuration. Computational results showed that both SG and WG configurations yielded similar levels of IMEP, however, in-cylinder turbulence was relatively enhanced for SG configuration compared to WG configuration. Further, it was noted that for early injection timings, the backflow of air in the intake manifold led to the fuel also being drawn along with it. Early injection timings until the middle of intake, i.e. SOI 330 CAD bTDC to SOI 270 CAD bTDC, led to better charge homogeneity, higher heat release and low HC emission. Thereafter combustion was slow and incomplete due to the formation of large lean and rich pockets. In both the configurations fuel impingement on the walls was found to be significant due to the small bore of the engine. For the SG configuration, the impingement on the liner was significant, whereas the WG configuration led to dominant piston impingement. Results also showed that the CO emission was higher for the SG configuration for all the timings studied due to the formation of rich pockets. However, the specific emission of NO was higher for the WG configuration due to the formation of slightly lean products of charge.
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Jose, J., Thakur, H., Mittal, M., and Ramesh, A., "A Computational Study on the Effect of Injector Location on the Performance of a Small Spark-Ignition Engine Modified to Operate under the Direct-Injection Mode," SAE Technical Paper 2020-01-0286, 2020, https://doi.org/10.4271/2020-01-0286.Data Sets - Support Documents
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References
- Zhao , H. Advanced Direct Injection Combustion Engine Technologies and Development First Woodhead Publishing Limited 2010 10.1533/9781845697327
- Yu , C.H. , Park , K.W. , Han , S.K. , and Kim , W.T. 2016
- Liu , Y. , Pei , Y. , Peng , Z. , Qin , J. et al. Spray Development and Droplet Characteristics of High-Temperature Single-Hole Gasoline Spray Fuel 191 97 105 2017 10.1016/j.fuel.2016.11.068
- Eichhorn , A. , Lejsek , D. , Hettinger , A. , and Kufferath , A. Challenge Determining a Combustion System Concept for Downsized SI-engines - Comparison and Evaluation of Several Options for a Boosted 2-cylinder SI-engine SAE Technical Paper 2013-01-1730 2013 https://doi.org/10.4271/2013-01-1730
- Bogarra , M. , Herreros , J.M. , Hergueta , C. , Tsolakis , A. et al. Influence of Three-Way Catalyst on Gaseous and Particulate Matter Emissions During Gasoline Direct Injection Engine Cold-Start Johnson Matthey Technol. Rev. 61 4 329 341 2017 10.1595/205651317X696315
- Jose , J. , Parsi , A. , Shridhara , S. , Mittal , M. et al. Effect of Fuel Injection Timing on the Mixture Preparation in a Small Gasoline Direct-Injection Engine SAE Technical Paper 2018-32-0014 2018 https://doi.org/10.4271/2018-32-0014
- Jose , J.V. , Mittal , M. , and Ramesh , A. A Computational Study of In-Cylinder Flow, and the Influence of Injection Timing on Mixture Preparation in a Small-Bore GDI Engine NCICEC Conf. Proceedings 2017
- Rounce , P. , Brogan , M. , and Eastwood , P. Gasoline Direct Injected Particulate Emissions Control at Stage 6 Internal Combustion Engines: Performance, Fuel Economy and Emissions Elsevier 2013 231 250 10.1533/9781782421849.6.231
- Stan , C. , Stanciu , A. , and Guenther , S. 2013
- Mittal , M. , Hung , D.L.S. , Zhu , G. , and Schock , H.J. Fuel Spray Visualization and its Impingement Analysis on in-Cylinder Surfaces in a Direct-Injection Spark-Ignition Engine J. Vis. 14 2 149 160 2011 10.1007/s12650-011-0083-0
- Reddy , A.A. and Mallikarjuna , J.M. 2017 https://doi.org/10.4271/2017-26-0039
- Henriot , S. , Chaouche , A. , Chevé , E. , Duclos , J.M. , Leduc , P. , Ménégazzi , P. , Monnier , G. , and Ranini , A. 1999 https://doi.org/10.4271/1999-01-0172
- Fiengo , G. , di Gaeta , A. , Palladino , A. , and Giglio , V. Common Rail System for GDI Engines Springer London London 2013 10.1007/978-1-4471-4468-7
- Achleitner , E. , Bäcker , H. , and Funaioli , A. Direct Injection Systems for Otto Engines Reprinted From Diesel Injection SI Engine Technology 724 776 790 2007
- Baranescu , G. Some Characteristics of Spark Assisted Direct Injection Engine SAE Technical Paper 830589 1983 https://doi.org/10.4271/830589
- Anderson , W. , Yang , J. , Brehob , D.D. , Vallance , J.K. , and Whiteaker , R.M. 2016
- Park , C. , Kim , S. , Kim , H. , and Moriyoshi , Y. Stratified Lean Combustion Characteristics of a Spray-Guided Combustion System in a Gasoline Direct Injection Engine Energy 41 1 401407 2012 10.1016/j.energy.2012.02.060
- Drake , M.C. , Fansler , T.D. , Solomon , A.S. , and Szekely , G.A. 2003 https://doi.org/10.4271/2003-01-0547
- Stevens , E. and Steeper , R. 2001 https://doi.org/10.4271/2001-01-1203
- Johansson , A. and Dahlander , P. Experimental Investigation of the Influence of Boost on Combustion and Particulate Emissions in Optical and Metal SGDI-Engines Operated in Stratified Mode SAE International Journal of Engines 9 2 807 818 2016 https://doi.org/10.4271/2016-01-0714
- Karlsson , R. and Heywood , J. Piston Fuel Film Observations in an Optical Access GDI Engine SAE Technical Paper 2001-01-2022 2001 https://doi.org/10.4271/2001-01-2022
- Liu , Y.D. , Jia , M. , Xie , M.Z. , and Pang , B. Enhancement on a Skeletal Kinetic Model for Primary Reference Fuel Oxidation by Using a Semi-Decoupling Methodology Energy and Fuels 26 12 70697083 2012 10.1021/ef301242b
- Han , Z. and Reitz , R.D. Turbulence Modeling of Internal Combustion Engines Using RNG K-ɛ Models Combust. Sci.Technol. 106 46 267295 1995 10.1080/00102209 508907782
- Reitz , R.D. and Beale , J.C. Modeling Spray Atomization with the Kelvin-Helmholtz/Rayleigh-Taylor Hybrid Model Atomization Sprays 9 6 623 650 1999 10.1615/AtomizSpr.v9.i6.40
- Su , J. , Xu , M. , Yin , P. , Gao , Y. et al. Particle Number Emissions Reduction Using Multiple Injection Strategies in a Boosted Spark-Ignition Direct-Injection (SIDI) Gasoline Engine SAE International Journal of Engines 8 1 20 29 2015 https://doi.org/10.4271/2014-01-2845
- Rourke , P.J.O. , Amsden , A.A. , and Butler , T.D. Improvements of the KIVA-II Computer Program for Numerical Combustion Dervieux , A. , Larrouturou , B. Numerical Combustion Lecture Notes Physics 351 Berlin, Heidelberg Springer 1989 3 4 10.1007/3-540-51968-8_79
- Liu , A.B. , Mather , D. , and Reitz , R.D. Modeling the Effects of Drop Drag and Breakup on Fuel Sprays SAE International. Congress Expo. 298 412 1 6 1993 https://doi.org/10.4271/93007
- O’Rourke 1981
- O'Rourke , P. and Amsden , A. A Spray/Wall Interaction Submodel for the KIVA-3 Wall Film Model SAE Technical Paper 2000-01-0271 2000 https://doi.org/10.4271/2000-01-0271
- Costa , M. , Marchitto , L. , Merola , S.S. , and Sorge , U. Study of Mixture Formation and Early Flame development in a Research GDI (Gasoline Direct Injection) Engine through Numerical Simulation and V-Digital Imaging Energy 77 Supplement C 88 96 2014 10.1016/j.energy.2014.04.114
- Heywood , J.B. Internal Combustion Engine Fundamentals 1988 10987654