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Experimental Study of Additive-Manufacturing-Enabled Innovative Diesel Combustion Bowl Features for Achieving Ultra-Low Emissions and High Efficiency
ISSN: 0148-7191, e-ISSN: 2688-3627
Published June 30, 2020 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
In recent years the research on Diesel engines has been increasingly shifting from performance and refinement to ultra-low emissions and efficiency. In fact, the last two attributes are key for the powertrain competitiveness in the propulsion electrified future, especially in the European market where 95gCO2/km fleet average and Euro6D RDE Step2 are phasing in at the same time. The present paper describes some of the most innovative research that GM and Istituto Motori Napoli are performing in the field, exploring how the steel-based additive manufacturing can be used to create innovative combustion bowl features that optimize the combustion process to a level that was not compatible with standard manufacturing technologies. In particular, a novel profile combining highly-reentrant sharp-stepped bowl with inner radial-lips has been studied on a 0.5ℓ single-cylinder engine in conjunction to a state of art 2500bar fast-acting fuel injection system, with the objective to demonstrate the full potential of optimized fuel stratification and spray separation enabled by the Radial Mixing Zone (RMZ) concept. The results confirmed the improved fuel/air mixing and more complete combustion promoted by RMZ, that favors PM oxidation. Indeed, after fine-tuning of injector protrusion and spray indexing to the radial lips, excellent reduction of PM by 25-50% vs baseline Euro6B design was recorded, with no detriment to the indicated efficiency nor engine power density. The novel bowl profile was especially effective when compact injection patterns have been applied at part load. This initial study provides a good reference for further improvements that are already under investigation, including durability of the additive manufactured piston with complex geometry.
- Giacomo Belgiorno - GM Global Propulsion Systems
- Andrea Boscolo - GM Global Propulsion Systems
- Gennaro Dileo - GM Global Propulsion Systems
- Fabio Numidi - GM Global Propulsion Systems
- Francesco Concetto Pesce - GM Global Propulsion Systems
- Alberto Vassallo - GM Global Propulsion Systems
- Roberto Ianniello - Istituto Motori CNR
- Carlo Beatrice - Istituto Motori CNR
- Gabriele Di Blasio - Istituto Motori CNR
CitationBelgiorno, G., Boscolo, A., Dileo, G., Numidi, F. et al., "Experimental Study of Additive-Manufacturing-Enabled Innovative Diesel Combustion Bowl Features for Achieving Ultra-Low Emissions and High Efficiency," SAE Technical Paper 2020-37-0003, 2020, https://doi.org/10.4271/2020-37-0003.
Data Sets - Support Documents
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- European Automobile Manufacturers Association (ACEA) , “2020-2021 Automobile Industry Pocket Guide,” June 2019.
- Baldino, C., Tietge, U., Muncrief, R., Bernard, Y., and Mock, P. , “Road Tested: Comparative Overview of Real-World versus Type-Approval NOx and CO2 Emissions from Diesel Cars in Europe,” ICCT White Paper, accessed September 2017, https://www.theicct.org/sites/default/files/publications/ICCT_RoadTested_201709.pdf.
- Kufferath, A., Krüger, M., Naber, D., Mailänder, E., and Maier, R. , “The Path to a Negligible NO2 Immission Contribution from the Diesel Powertrain,” in Vienna Motoren Symposium, 2018.
- Avolio, G., Brück, R., Grimm, J., Maiwald, O., Rösel, G., and Zhang, H. , “Super Clean Electrified Diesel: Towards Real NOx Emissions below 35 mg/km,” in 27th Aachen Kolloquium Automobile and Engine Technology, 2018.
- Steinparzer, F., Nefischer, P., Stütz, W., Hiemesch, D. and Kaufmann, M. , “The New BMW Six-Cylinder Top Engine With Innovative Turbocharging Concept,” in 37th Vienna Motoren Symposium, 2016.
- Di Blasio, G., Beatrice, C., Belgiorno, G., Pesce, F. et al. , “Functional Requirements to Exceed the 100 kW/l Milestone for High Power Density Automotive Diesel Engines,” SAE Int. J. Engines 10(5):2342-2353, 2017, https://doi.org/10.4271/2017-24-0072.
- Luckert, P., Arndt, S., Duvinage, F., Kemmner, M. et al. , “The New Mercedes-Benz 4-Cylinder Diesel Engine OM654 - The Innovative Base Engine of the New Diesel Generation,” in 24th Aachen Colloquium Automobile and Engine Technology 2015.
- Recker, P., Gheorghe, M., Menne, C., Xenakis, L., Lilley, A., and Maugham, R. , “Investigations for the Extension of the LP-EGR Operation Area at the Background of RDE,” in 25th Aachen Colloquium Automobile and Engine Technology, 2016.
- Verdino, V., Vassallo, A. et al. , “The New General Motors 3.0l Duramax Diesel Engine: A Technology Milestone Combining State-of-Art Efficiency, Emissions, Performance and Refinement”, in Proceeding of Diesel Powertrains 3.0, 2019.
- Beatrice, C., Di Blasio, G., Pesce, F., Vassallo, A. et al. , “Key Fuel Injection System Features for Efficiency Improvement in Future Diesel Passenger Cars,” SAE Int. J. Adv. & Curr. Prac. in Mobility 1(3):1084-1099, 2019, https://doi.org/10.4271/2019-01-0547.
- Di Blasio, G., Beatrice, C., Ianniello, R., Pesce, F. et al. , “Balancing Hydraulic Flow and Fuel Injection Parameters for Low-Emission and High-Efficiency Automotive Diesel Engines,” SAE Technical Paper 2019-24-0111 , 2019, https://doi.org/10.4271/2019-24-0111.
- Tanov, S., Pachano, L., Andersson, Ö., Wang, Z. et al. , “Influence of Spatial and Temporal Distribution of Turbulent Kinetic Energy on Heat Transfer Coefficient in a Light Duty CI Engine Operating with Partially Premixed Combustion,” Appl. Therm. Eng. 129:31-40, 2018, doi:10.1016/j.applthermaleng.2017.10.006.
- Garcia-Oliver, J.M., Garcia, A., Gil, A., and Pachano, L. , “Study of Air Flow Interaction with Pilot Injections in a Diesel Engine by Means of PIV Measurements,” SAE Int. J. Engines 10(3):740-751, 2017, https://doi.org/10.4271/2017-01-0617.
- Miles, P.C., Hildingsson, L., and Hultqvist, A. , “The Influence of Fuel Injection and Heat Release on Bulk Flow Structures in a Direct-Injection, Swirl-Supported Diesel Engine,” Exp. Fluids 43(2-3):273-283, 2007, doi:10.1007/s00348-007-0281-7.
- Eismark, J., Andersson, M., Christensen, M., Karlsson, A. et al. , “Role of Piston Bowl Shape to Enhance Late-Cycle Soot Oxidation in Low-Swirl Diesel Combustion,” SAE Int. J. Engines 12(3):233-249, 2019, https://doi.org/10.4271/03-12-03-0017.
- Dolan, R., Budde, R., Schramm, C., and Rezaei, R. , “3D Printed Piston for Heavy-Duty Diesel Engines”, in 2018 Ndia Ground Vehicle Systems Engineering and Technology Symposium Power & Mobility (P&M) Technical Session, August 7-9, 2018 - NOVI, MICHIGAN, https://events.esd.org/wp-content/uploads/2018/07/3D-Printed-Piston-for-Heavy-Duty-Diesel-Engines.pdf.
- Yao, M., Zheng, Z., and Liu, H. , “Progress and Recent Trends in Homogeneous Charge Compression Ignition (HCCI) Engines,” Progress in Energy and Combustion Science. 35(5):398-437, 2009.
- Wei, S., Wang, F., Leng, X., Liu, X., and Ji, K. , “Numerical Analysis on the Effect of Swirl Ratios on Swirl Chamber Combustion System of DI Diesel Engines,” Energy Conversion and Management 75:184-190, 2013.
- Eismark, J. and Balthasar, M. , “A Piston Positioned for Reciprocal Movement in a Combustion Engine Cylinder,” EP 2536930 B1, 2012.
- Li, X., Chen, Y., Su, L., and Liu, F. , “Effects of Lateral Swirl Combustion Chamber Geometries on the Combustion and Emission Characteristics of DI Diesel Engines and a Matching Method for the Combustion Chamber Geometry,” Fuel. 224:644-660, 2018.
- Millo, F., Piano, A., Bianco, A., Pesce, F., and Vassallo, A. , “Numerical Assessment of Innovative Bowl Geometries over Different Swirl Ratios and EGR rates for a Light Duty Diesel Engine,” to be presented at SAE 2020WCX, Detroit, 2020.
- Millo, F., Piano, A., Bianco, A., Pesce, F., and Vassallo, A. , “Numerical Assessment of an Innovative Piston Bowl Concept in a Light-Duty Diesel Engine,” to be presented at SIA Powertrain 2020, Rouen, 2020.
- Vassallo, A., Beatrice, C., Di Blasio, G., Belgiorno, G. et al. , “The Key Role of Advanced, Flexible Fuel Injection Systems to Match the Future CO2 Targets in an Ultra-Light Mid-Size Diesel Engine,” SAE Technical Paper 2018-37-0005 , 2018, https://doi.org/10.4271/2018-37-0005.
- Mendez, S. and Thirouard, B. , “Using Multiple Injection Strategies in Diesel Combustion: Potential to Improve Emissions, Noise and Fuel Economy Trade-Off in Low CR Engines,” SAE International Journal of Fuels and Lubricants 1(1):662-674, 2009, https://doi.org/10.4271/2008-01-1329.
- O'Connor, J. and Musculus, M. , “Post Injections for Soot Reduction in Diesel Engines: A Review of Current Understanding,” SAE Int. J. of Engines 6(1):400-421, 2013, https://doi.org/10.4271/2013-01-0917.
- O’Connor, J. and Musculus, M. , “Effects of Exhaust Gas Recirculation and Load on Soot in a Heavy-Duty Optical Diesel Engine with Close-Coupled Post Injections for High-Efficiency Combustion Phasing,” International Journal of Engine Research 15(4):421-443, 2014.
- Kashdan, J., Mendez, S., and Bruneaux, G. , “On the Origin of Unburned Hydrocarbon Emissions in a Wall Guided, Low NOx Diesel Combustion System,” SAE Technical Paper 2007-01-1836 , 2007, https://doi.org/10.4271/2007-01-1836.
- Han, M., Assanis, D.N., and Bohac, S.V. , “Sources of Hydrocarbon Emissions from Low-Temperature Premixed Compression Ignition Combustion from a Common Rail Direct Injection Diesel Engine,” Combust Sci Technol 181:496-517, 2009.
- Eismark, J., Christensen, M., Andersson, M., Karlsson, A., and Denbratt, I. , “Role of Fuel Properties and Piston Shape in Influencing Soot Oxidation in Heavy-Duty Low Swirl Diesel Engine Combustion,” Fuel 254:115568, 2019.