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Impact of the Injection Strategy on Soot Reactivity and Particle Properties of a GDI Engine
Technical Paper
2020-01-0392
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The gradual global tightening of emission legislation for particulate matter emissions requires the development of new gasoline engine exhaust aftertreatment systems. For this reason, the development of gasoline direct injection engines aims at the reduction of particulate emissions by application of a Gasoline Particulate Filter (GPF). The regeneration temperature of GPF depend on soot reactivity towards oxidation and therefore on particle properties. In this study, the soot reactivity is correlated with nanostructural characteristics of primary gasoline particles as a function of specific engine injection parameters. The investigations on particle emissions were carried out on a turbocharged 4-cylinder GDI-engine that allows the variation of injection parameters. The emitted engine soot particles have been in-situ characterized towards their number and size distribution using an engine exhaust particle sizer (EEPS). Ex-situ analytics focuses on the analysis of oxidation kinetics and the nanostructural characteristics affecting soot reactivity significantly. The oxidation kinetics were determined by temperature programmed oxidation (TPO) employing thermogravimetric analysis (TGA). The temperature at the maximum of the reaction rate is referred to Tmax, where low temperatures are linked to high reactivity. In addition, the nanostructure analysis of primary particles (graphene layer length, tortuosity and separation distance) was also investigated by using high resolution transmission microscopy (HRTEM) and an image analysis algorithm. Findings from this work show that soot reactivity relies significantly on the quality of mixture formation of a GDI engine depending on injection strategy. These findings are in very good agreement with the nanostructural parameters obtained by high-resolution transmission electron microscopy. Soot particles formed in a relatively homogeneous air/fuel mixture due to optimized injection parameters show a high soot reactivity (Tmax ≈ 525°C) and an amorphous carbon nanostructure. Such primary particles are characterized by short mean graphene layer length (Lmean ≈ 0.5 nm) and an unordered configuration resulting in an increased separation distance (Dmean ≈ 1 nm). In addition, approximately a comparable number of small (Dp ≈ 5...25 nm) and large particles (Dp ≈ 30...100 nm) are generated. Conversely, inhomogeneous mixtures result in increased formation of primary particles showing long, extended and more ordered graphene (Lmean ≈ 0.55 nm, Dmean = 0.4 nm), which in turn lead to low soot reactivity (Tmax ≈ 615°C).
Authors
- Sergej Koch - Diploma Engineer
- Heiko Kubach - Karlsruhe Institute Of Technology
- Heiko Kubach - Karlsruhe Institute of Technology
- Thomas Koch - Karlsruhe Institute Of Technology
- Thomas Koch - Karlsruhe Institute of Technology
- Fabian P. Hagen - Karlsruhe Institute Of Technology
- Fabian P. Hagen - Karlsruhe Institute of Technology
- Alexandra Loukou - Karlsruhe Institute Of Technology
- Alexandra Loukou - Karlsruhe Institute of Technology
- Rainer Suntz - Karlsruhe Institute Of Technology
- Rainer Suntz - Karlsruhe Institute of Technology
Citation
Koch, S., Kubach, H., Velji, A., Koch, T. et al., "Impact of the Injection Strategy on Soot Reactivity and Particle Properties of a GDI Engine," SAE Technical Paper 2020-01-0392, 2020, https://doi.org/10.4271/2020-01-0392.Data Sets - Support Documents
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References
- Saliba , G. , Saleh , R. , Zhao , Y. , Presto , A.A. et al. Comparison of Gasoline Direct-Injection (GDI) and Port Fuel Injection(PFI) Vehicle Emissions: Emission Certification Standards, Cold-Start, Secondary Organic Aerosol Formation Potential, and Potential Climate Impacts Environ. Sci. Technol. 51 6542 6552 2017
- Tiegang , F. , Libing , W. , and Zhi , W. Particulate Matter Emissions from Gasoline Direct Injection Engines: Research Review Journal Automotive Safety and Energy 8 3 2017
- Wen , Y. , Wang , Y. , and Fu , C. The Impact of Injector Deposits on Spray and Particulate Emission of Advanced Gasoline Direct Injection Vehicle SAE Technical Paper 2016-01-2284 2016 https://doi.org/10.4271/2016-01-2284
- Lapuerta , M. , Martos , F.J. , and Herreros , J.M. Effect of Engine Operating Conditions on the Size of Primary Particles Composing Diesel Soot Agglomerates Aerosol Science 38 2007 455 466 2007
- 2012
- Fang , H.L. and Lance , M.J. Influence of Soot Surface Changes on DPF Regeneration SAE Technical Paper 2004-01-3043 2004 https://doi.org/10.4271/2004-01-3043
- Bhardwaj , O.P. , Lüers , B. , Holderbaum , B. , Koerfer , T. et al. Utilization of HVO Fuel Properties in a High Efficiency Combustion System: Part 2: Relationship of Soot Characteristics with Its Oxidation Behavior in DPF SAE Int. J. Fuels Lubr. 7 979 994 2014 https://doi.org/10.4271/2014-01-2846
- Easter , J. , Fiano , A. , Bohac , S. et al. Evaluation of Low Mileage GPF Filtration and Regeneration as Influenced by Soot Morphology, Reactivity, and GPF Loading SAE Technical Paper 2019-01-0975 2019 https://doi.org/10.4271/2019-01-0975
- Lapuerta , M. , Oliva , F. , Agudelo , J.R. , and Boehman , A.L. Effect of Fuel on the Soot Nanostructure and Consequences on Loading and Regeneration of Diesel Particulate Filters Combustion and Flame 159 844 853 2012
- Lindner , S. , Massner , A. , Gaertner , U. , Bockhorn et al. Soot Is Not Equal to Soot - The Importance of Diesel Soot Reactivity for the Development of Combustion Processes and Exhaust Aftertreatment Systems Conference “The Working Process of the Internal Combustion Engine” 2015
- Yehliu , K. , Vander Wal , R.L. , and Boehman , A.L. Development of an HRTEM Image Analysis Method to Quantify Carbon Nanostructure Combustion and Flame 158 1837 1851 2011
- Ess , N. , Bladt , H. , Mühlbauer , W. et al. Reactivity and Structure of Soot Generated at Varying Biofuel Content and Engine Operating Parameters Combustion and Flame 163 175 269 2016
- Rinkenburger , A. , Toriyama , T. , Yasuda , K. Catalytic Effect of Potassium Compounds in Soot Oxidation ChemCatChem 2017 10.1002/cctc.201700338
- Knauer , M. , Carrara , M. , Rothe , D. , Niessner , R. et al. Changes in Structure and Reactivity of Soot during Oxidation and Gasification by Oxygen, Studied by Micro-Raman Spectroscopy and Temperature Programmed Oxidation Aerosol Science and Technology 43 1 8 2009
- Bogarra , M. , Herreros , J. , Tsolakis , A. et al. Gasoline Direct Injection Engine Soot Oxidation: Fundamentals and Determination of Kinetic Parameters Combustion and Flame 190 177 187 2018
- Knauer , M. , Schuster , M.E. , Su , D. et al. Soot Structure and Reactivity Analysis by Raman Microspectroscopy, Temperature-Programmed Oxidation, and High-Resolution Transmission Electron Microscopy Journal of Physical Chemistry 113 13871 13880 2009
- Dairene , U. , Monica , A.F. , Douglas , J. , Ann , E.O. et al. Characterization of Gasoline Soot and Comparison to Diesel Soot: Morphology, Chemistry, and Wear Tribology International 80 Dec. 2014
- Lee , K.O. , Cole , R. , Sekar , R. , Chio , M.Y. et al. Morphological Investigation of the Microstructure, Dimensions, and Fractal Geometry of Diesel Particulates Proc. Combustion Institute 29 1 647 653 2002
- Seong , H. , Lee , K. , and Choi , S. Effects of Engine Operating Parameters on Morphology of Particulates from a Gasoline Direct Injection (GDI) Engine SAE Technical Paper 2013-01-2574 2013 https://doi.org/10.4271/2013-01-2574
- Chakrabarty , R.K. , Moosmüller , H. , Arnott , W.P. , Garro , M.A. et al. Structural and Fractal Properties of Particles Emitted from Spark Ignition Engines Environmental Science & Technology 40 21 6647 6654 2006
- Gaddam , C.K. and Vander Wal , R.L. Physical & Chemical Characterization of SIDI Engine Particulates Combustion and Flame 160 2517 2528 2012
- Lee , K. , Seong , H. , Sakai , S. , Hageman , M. et al. Detailed Morphological Properties of Nanoparticles from Gasoline Direct Injection Engine Combustion of Ethanol Blends SAE Technical Paper 2013-24-0185 2013 https://doi.org/10.4271/2013-24-0185
- Raza , M. , Chen , L. , and Leach , F. 2018
- Uy , D. , Ford , M. , Jayne , D. et al. Characterization of Gasoline Soot and Comparison to Diesel Soot: Morphology, Chemistry, and Wear Journal Tribology International 80 198 209 2014
- Dairene , U. , Monica , A.F. , Jayne , D.T. , Ann , E.O. et al. Characterization of Gasoline Soot and Comparison to Diesel Soot: Morphology, Chemistry, and Wear Tribology International 80 Dec. 2014
- Barone , T. , Storey , J. , Youngquist , A. et al. An Analysis of Direct-Injection Spark-Ignition (DISI) Soot Morphology Journal Atmospheric Environment 49 1 268 274 2012
- Pfau , S.A. , La Rocca , A. , Haffner-Staton , E. et al. Soot in the Lubricating Oil: An Overlooked Concern for the Gasoline Direct Injection Engine? SAE Technical Paper 2019-01-0301 2019 https://doi.org/10.4271/2019-01-0301
- Luo , Y. , Thu , L. , Fang , J. et al. Size Distribution, Chemical Composition and Oxidation Reactivity of Particulate Matter from Gasoline Direct Injection (GDI) Engine Fueled with Ethanol-Gasoline Fuel Applied Thermal Engineering 89 2015 647 655 2015
- Stanmore , B.R. , Brilhac , J.F. , and Gilot , P. The Oxidation of Soot: A Review of Experiments, Mechanisms and Models Carbon 39 2247 2268 2001
- Mühlbauer , W. , Zöllner , C. , Lehmann , S. , Lorenz , S. et al. Correlations between Physicochemical Properties of Emitted Diesel Particulate Matter and Its Reactivity Combustion and Flame 167 39 51 2016
- Choi , S. and Seong , H. Oxidation Characteristics of Gasoline Direct-Injection (GDI) Engine Soot: Catalytic Effects of Ash and Modified Kinetic Correlation Combust. Flame 162 2371 2389 2015
- Van der Wal , R.L. and Tomasek , A.J. Soot Oxidation: Dependence upon Initial Nanostructure Combustion and Flame 134 1 9 2003
- Jang , J. , Choi , J. , Yi , H. et al. 2019
- Bogarra , M. , Herreros , J. , Tsolakis , A. et al. Gasoline Direct Injection Engine Soot Oxidation: Fundamentals and Determination of Kinetic Parameters Combustion and Flame 190 177 187 2018
- Wen , Y. , Wang , Y. , and Fu , C. The Impact of Injector Deposits on Spray and Particulate Emission of Advanced Gasoline Direct Injection Vehicle SAE Technical Paper 2016-01-2284 2016 https://doi.org/10.4271/2016-01-2284
- La Rocca , A. , Bonatesta , F. , Fay , M.W. et al. Characterization of Soot in Oil from a Gasoline Direct Injection Engine Using Transmission Electron Microscopy Tribology International 86 2015 77 84 2015
- Bock , N. , Jeon , J. , Kittelson , D. , and Northrop , W. Effects of Fuel Properties on Particle Number and Particle Mass Emissions from Lean and Stoichiometric Gasoline Direct Injection Engine Operation SAE Technical Paper 2019-01-1183 2019 https://doi.org/10.4271/2019-01-1183
- Bertsch , M. , Weidenlener , A. , Dörnhöfer , J. et al. Effect of Implementing Large-Scale Charge Motion, Reducing Hydraulic Flow of the Injector and Increasing Injection Pressure on Particle Emissions of a GDI Engine at WOT and Boosted Operation International Journal of Engine Research 18 5.6 467 489 2017 10.1177/1468087416670248
- Chen , L. , Liang , Z. , Zhang , X. , and Shuai , S. Characterizing Particulate Matter Emissions from GDI and PFI Vehicles under Transient and Cold Start Conditions Fuel 2017 189 131 140 2017
- Sharma , A. , Kyotani , T. , and Tomita , A. A New Quantitative Approach for Microstructural Analysis of Coal Char Using HRTEM Images Fuel 78 1203 1212 1999
- Yehliu , K. , Vander Wal , R.L. , and Boehman , A.L. Development of an HRTEM Image Analysis Method to Quantify Carbon Nanostructure Combustion and Flame 158 1837 1851 2011
- Pfau , S. , La Rocca , A. , and Fay , M. Quantifying Soot Nanostructures: Importance of Image Processing Parameters for Lattice Fringe Analysis Combustion and Flame 211 2020
- Yehliu , K. , Vander Wal , R.L. , and Boehman , A.L. A Comparison of Soot Nanostructure Obtained Using Two High Resolution Transmission Electron Microscopy Image Analysis Algorithms Carbon 49 4256 4268 2011
- Ess , N. , Bladt , H. , Mühlbauer , W. et al. Reactivity and Structure of Soot Generated at Varying Biofuel Content and Engine Operating Parameters Combustion and Flame 163 175 269 2016
- Palotas , A.B. , Rainey , L.C. , Feldermann , C.J. , Sarofim , A.F. et al. Soot Morphology: An Application of Image Analysis in High-Resolution Transmission Electron Microscopy Microsc. Res. Tech. 33 266 278 1996
- Sharma , A. , Kyotani , T. , and Tomita , A. Comparison of Structural Parameters of PF Carbon from XRD and HRTEM Techniques Carbon 38 1977 1984 2000
- Shim , H.S. , Hurt , R.H. , and Yang , N.Y.C. A Methodology for Analysis of 002 Lattice Fringe Images and Its Application to Combustion-Derived Carbons Carbon 38 29 45 2000
- Sharma , A. , Kyotani , T. , and Tomita , A. A New Quantitative Approach for Microstructural Analysis of Coal Char Using HRTEM Images Fuel 78 1203 1212 1999
- Botero , M.L. , Chen , D. , González-Calera , S. , Jefferson , D. et al. HRTEM Evaluation of Soot Particles Produced by the Non-Premixed Combustion of Liquid Fuels Carbon 96 459 473 2016
- Zhang , T.Y. and Suen , C.Y. A Fast Parallel Algorithm for Thinning Digital Patterns Communications of the ACM 27 236 239 1984
- Hagen , F.P. , Hardock , F. , Bockhorn , H. , Loukou , A. et al. Soot Particles: Nanostructure from HRTEM Images, Optical Properties and Reactivity P. Mediterranean Comb. Symp. Tenerife, Spain 16 20 2019
- Hagen , F.P. , Hardock , F. , Bockhorn , H. , Loukou , A. et al. Soot Particle Nanostructure from HRTEM Images and Reactivity towards Oxidation P. European Comb. Meeting Lisboa, Portugal 2019
- Steimle , F. , Kulzer , A. , Richter , H. , and Schwarzenthal , D. Systematic Analysis and Particle Emission Reduction of Homogeneous Direct Injection SI Engines SAE Technical Paper 2012-01-0092 2012 https://doi.org/10.4271/2012-01-0092
- Hertler , D. , Stirn , R. , Arndt , S. , and Grzeszik , R. Investigations of Soot Formation in an Optically Accessible Gasoline Direct Injection Engine by Means of Laser-Induced Incandescence (LII) Applied Physics B 2011
- Velji , A. , Yeom , K. , Wagner , U. , Spicher , U. et al. Investigations of the Formation and Oxidation of Soot Inside a Direct Injection Spark Ignition Engine Using Advanced Laser-Techniques SAE Technical Paper 2010-01-0352 2012 https://doi.org/10.4271/2010-01-0352