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Investigation of Pilot and Multiple Injection Parameters on Mixture Formation and Combustion Characteristics in a Heavy Duty DI-Diesel Engine
Technical Paper
2012-01-0142
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The mechanism of NOx and soot reduction using different pilot and multiple injection strategies has been computationally studied in a heavy duty DI Diesel engine. A designed set of advanced injection schemes with various variables and exhaust gas recirculation rate (up to 10%) have been analyzed. The CFD model was firstly calibrated against experimental data for a part load operation at 1600 rpm. The computational models used were found to predict the correct trends obtained in the experiment. The study demonstrated the potential and explained the mechanism of the combination of EGR and multiple injection to reduce both soot and NOx emissions together with improved fuel economy. The results showed that injecting a small percentage of fuel in the pilot injection pulse (e.g., 5%) accompanied with adequate fuel in the second injection pulse (e.g., 25%) can reduce the ignition delay and the premixed combustion period, leading to lower temperature and NOx emission while not increasing soot formation in the late combustion phase. It has been also found that increase the number of injection pulses (up to five separate injection pulses per engine cycle) can be more beneficial for the reduction of NOx and soot emissions compared with split injection cases, however the amount of BSFC in these cases should be considered as a main disadvantage.
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Mobasheri, R. and Peng, Z., "Investigation of Pilot and Multiple Injection Parameters on Mixture Formation and Combustion Characteristics in a Heavy Duty DI-Diesel Engine," SAE Technical Paper 2012-01-0142, 2012, https://doi.org/10.4271/2012-01-0142.Also In
References
- Heywood, J. B. “Internal Combustion Engine Fundamentals,” McGraw-Hill, Inc. New York 1988
- Chan, M. Das, S. Reitz, R. “Modeling Multiple Injection and EGR Effects on Diesel Engine Emissions,” SAE Technical Paper 972864 1997 10.4271/972864
- Ladommatos, N. Abdelhalim, S. Zhao, H. Hu, Z. “The Dilution, Chemical, and Thermal Effects of Exhaust Gas Recirculation on Disesel Engine Emissions - Part 4: Effects of Carbon Dioxide and Water Vapour,” SAE Technical Paper 971660 1997 10.4271/971660
- Ladommatos, N. Abdelhalim, S. Zhao, H. Hu, Z. “Effects of EGR on Heat Release in Diesel Combustion,” SAE Technical Paper 980184 1998 10.4271/980184
- Tow, T. Pierpont, D. Reitz, R. “Reducing Particulate and NOx Emissions by Using Multiple Injections in a Heavy Duty D.I. Diesel Engine,” SAE Technical Paper 940897 1994 10.4271/940897
- Hentschel, W. Richter, J. “Time-Resolved Analysis of Soot Formation and Oxidation in a Direct-Injection Diesel Engine for Different EGR-Rates by an Extinction Method,” SAE Technical Paper 952517 1995 10.4271/952517
- Dürnholz, M. Endres, H. Frisse, P. “Preinjection A Measure to Optimize the Emission Behavior of DI-Diesel Engine,” SAE Technical Paper 940674 1994 10.4271/940674
- Wiedenhoefer, J.F. Reitz, R.D. “Modelling the Effect of EGR and Multiple Injection Schemes on I.C. Engine Component Temperatures” Numerical Heat Transfer, Part A: Applications 37 7 673 694 2000 10.1080/104077800274028
- Badami, M. Mallamo, F. Millo, F. Rossi, E. “Influence of Multiple Injection Strategies on Emissions, Combustion Noise and BSFC of a DI Common Rail Diesel Engine,” SAE Technical Paper 2002-01-0503 2002 10.4271/2002-01-0503
- Mendez, S. Thirouard, B. “Using Multiple Injection Strategies in Diesel Combustion: Potential to Improve Emissions, Noise and Fuel Economy Trade-Off in Low CR Engines,” SAE Int. J. Fuels Lubr. 1 1 662 674 2009 10.4271/2008-01-1329
- Husberg, T. Denbratt, I. Karlsson, A. “Analysis of Advanced Multiple Injection Strategies in a Heavy-Duty Diesel Engine Using Optical Measurements and CFD-Simulations,” SAE Technical Paper 2008-01-1328 2008 10.4271/2008-01-1328
- Mobasheri, R. Peng, Z. Mirsalim, S. “CFD Evaluation of Effects of Split Injection on Combustion and Emissions in a DI Diesel Engine,” SAE Technical Paper 2011-01-0822 2011 10.4271/2011-01-0822
- Han, Z. Uludogan, A. Hampson, G. Reitz, R. “Mechanism of Soot and NOx Emission Reduction Using Multiple-injection in a Diesel Engine,” SAE Technical Paper 960633 1996 10.4271/960633
- Ricaud, J.C. Lavoisier, F. “Optimizing the Multiple Injection Settings on an HSDI Diesel Engine” THIESEL 2002 conference 2002
- Uchida, N. Shimokawa, K. Kudo, Y. Shimoda, M. “Combustion Optimization by Means of Common Rail Injection System for Heavy-Duty Diesel Engines,” SAE Technical Paper 982679 1998 10.4271/982679
- Mattarelli, E. Bianchi, G. Ivaldi, D. “Experimental and Numerical Investigation on the EGR System of a New Automotive Diesel Engine,” SAE Technical Paper 2000-01-0224 2000 10.4271/2000-01-0224
- ICE Physics & Chemistry AVL FIRE user Manual v.2009.2 2009
- Tatschl, R. Priesching, P. Ruetz, J. “Recent Advances in DI-Diesel Combustion Modeling in AVL FIRE - A Validation Study,” International Multidimensional Engine Modeling User's Group Meeting at the SAE Congress Detroit 2007
- Priesching, P. Ramusch, G. Ruetz, J. Tatschl, R. “3D-CFD Modeling of Conventional and Alternative Diesel Combustion and Pollutant Formation - A Validation Study” SAE Technical Paper 2007-01-1907 2007 10.4271/2007-01-1907
- Hélie, J. Trouvé, A. “A modified coherent flame model to describe turbulent flame propagation in mixtures with variable composition” Proc. Combust. Inst. 28 2000 193 201 10.1016/S0082-0784(00)80211-8
- Colin, O. Benkenida, A. “The 3-Zones Extended Coherent Flame Model (ECFM3Z) for Computing Premixed / Diffusion Combustion” Oil & Gas Science and Technology - Rev. IFP 59 6 2004 593 609 http://dx.doi.org/10.2516/ogst:2004043
- Halstead, M. Kirsch, L. Quinn, C. “The Auto Ignition of Hydrocarbon Fueled at High Temperatures and Pressures-Fitting of a Mathematical Model” Combustion Flame 30 45 60 1977 http://dx.doi.org/10.1016/0010-2180(77)90050-5
- Reitz, R. D. “Modeling Atomization Processes in High-Pressure Vaporizing Sprays” Atomization and Spray Technology 3 309 337 1987
- Naber, J. Reitz, R. “Modeling Engine Spray/Wall Impingement,” SAE Technical Paper 880107 1988 10.4271/880107
- Corcione, F.E. Allocca, L. Pelloni, P. Bianchi, G. M. Luppino, F. “Modeling atomization and drop breakup of high-pressure Diesel Sprays” ASME Journal of Engineering for Gas Turbine and Power 123 2 419 427 2001 10.1115/1.1361110
- Dukowicz, J.K. “Quasi-Steady Droplet Change in the Presence Of Convection” Informal Report Los Alamos Scientific Laboratory, LA7997-MS
- Han, Z. Reitz, R. D. “Turbulence modelling of internal combustion engines using RNG k-e models” Combust. Sci. and Technol. 1995 106 267 295 10.1080/00102209508907782
- Nishida, K. Hiroyasu, H. “Simplified Three-Dimensional Modeling of Mixture Formation and Combustion in a D.I. Diesel Engine,” SAE Technical Paper 890269 1989 10.4271/890269