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Methods of Improving Combustion Efficiency in a High-Efficiency, Lean Burn Dual-Fuel Heavy-Duty Engine
ISSN: 0148-7191, e-ISSN: 2688-3627
Published January 15, 2019 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
Combustion losses are one of the largest areas on inefficiency in natural gas/diesel dual-fuel engines, especially when compared to the traditional diesel engines on which they are based. These losses can vary from 1-2% at high load, to more than 6% of the total fuel energy at part load conditions. For diesel/natural gas dual-fuel engines, the three main sources of combustion losses are: bulk losses (increasing air-fuel ratio, AFR, to the premixed fuel’s lean flammability limit), crevice losses (premixed fuel trapped near valve pockets and top ring lands unable to oxidize), and blow-through losses (fumigated fuel/air intake charge passes through the cylinder and out the exhaust valve during valve overlap). In order to improve overall engine efficiency and decrease greenhouse gas emissions, these losses must be minimized. In this paper, various mitigation techniques are explored experimentally on a 13 L, 2010-class on-highway diesel engine that has been modified for fumigated natural gas dual-fuel research. An additional study separated the effects of bulk and crevice losses on lean mixtures by adding H2 to the fumigated natural gas to lower the mixture lean flammability limit, demonstrating that crevice losses are the dominant loss mechanism. Crevice-related combustion losses were then reduced by employing pistons with a decreased top ring-land height.
CitationNieman, D., Morris, A., Miwa, J., and Denton, B., "Methods of Improving Combustion Efficiency in a High-Efficiency, Lean Burn Dual-Fuel Heavy-Duty Engine," SAE Technical Paper 2019-01-0032, 2019, https://doi.org/10.4271/2019-01-0032.
Data Sets - Support Documents
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- Kofod, M. and Stephenson, T. , “Well-to Wheel Greenhouse Gas Emissions of LNG Used as a Fuel for Long Haul Trucks in a European Scenario,” SAE Technical Paper 2013-24-0110, 2013, doi:10.4271/2013-24-0110.
- Papagiannakis, R.G., Rakopoulos, C.D., Hountalas, D.T., and Rakopoulos, D.C. , “Emission Characteristics of High Speed, Dual Fuel, Compression Ignition Engine Operating in a Wide Range of Natural Gas/Diesel Fuel Proportions,” Fuel 89:1397-1406, 2010.
- US EPA 40 CFR Parts 9, 22, 85, et al.; NHTSA 49 CFR Parts 523, 534, et al., “Greenhouse Gas Emissions and Fuel Efficiency Standards for Medium and Heavy-Duty Engines and Vehicles-Phase 2; Final Rule” - Federal Register, 2016.
- Cozzolini, A., Littera, D., Ryskamp, R., Smallwood, J. et al. , “Characteristics of Exhaust Emissions from a Heavy-Duty Diesel Engine Retrofitted to Operate in Methane/Diesel Dual-Fuel Mode,” SAE Technical Paper 2013-24-0181, 2013, doi:10.4271/2013-24-0181.
- IPCC , “2007: Climate Change 2007: Synthesis Report. Contribution of Working Groups I, II and III to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change,” [Core Writing Team, Pachauri, R.K. and Reisinger, A. (eds.)], IPCC, Geneva, Switzerland, 104.
- Zoldak, P., Sobiesiak, A., Bergin, M., and Wickman, D. , “Computational Study of Reactivity Controlled Compression Ignition (RCCI) Combustion in a Heavy-Duty Diesel Engine Using Natural Gas,” SAE Technical Paper 2014-01-1321, 2014, doi:10.4271/2014-01-1321.
- Benajes, J., García, A., Monsalve-Serrano, J., and Boronat, V. , “Achieving Clean and Efficient Engine Operation up to Full Load by Combining Optimized RCCI and Dual-Fuel Diesel-Gasoline Combustion Strategies,” Energy Conversion and Management 136:142-151, 2017, doi:10.1016/j.enconman.2017.01.010.
- Besch, M., Israel, J., Thiruvengadam, A., Kappanna, H. et al. , “Emissions Characterization from Different Technology Heavy-Duty Engines Retrofitted for CNG/Diesel Dual-Fuel Operation,” SAE Int. J. Engines 8(3):1342-1358, 2015, doi:10.4271/2015-01-1085.
- Wagemakers, A. and Leermakers, C. , “Review on the Effects of Dual-Fuel Operation, Using Diesel and Gaseous Fuels, on Emissions and Performance,” SAE Technical Paper 2012-01-0869, 2012, doi:10.4271/2012-01-0869.
- Kokjohn, S., Hanson, R., Splitter, D., and Reitz, R. , “Experiments and Modeling of Dual-Fuel HCCI and PCCI Combustion Using In-Cylinder Fuel Blending,” SAE Int. J. Engines 2(2):24-39, 2010, doi:10.4271/2009-01-2647.
- Splitter, D., Wissink, M., Del Vescovo, D., and Reitz, R.D. , “RCCI Engine Operation towards 60% Thermal Efficiency,” SAE Technical Paper 2013-01-0279, 2013, doi:10.4271/2013-01-0279.
- Nieman, D., Dempsey, A., and Reitz, R. , “Heavy-Duty RCCI Operation Using Natural Gas and Diesel,” SAE Int. J. Engines 5(2):270-285, 2012, doi:10.4271/2012-01-0379.
- Kokjohn, S., Hanson, R., Splitter, D., and Reitz, R. , “Fuel Reactivity Controlled Compression Ignition (RCCI): A Pathway to Controlled High-Efficiency Clean Combustion,” International Journal of Engine Research 12(3):209-226, 2011.
- Hanson, R., Kokjohn, S., Splitter, D., and Reitz, R. , “An Experimental Investigation of Fuel Reactivity Controlled PCCI Combustion in a Heavy-Duty Engine,” SAE Int. J. Engines 3(1):700-716, 2010, doi:10.4271/2010-01-0864.
- Inagaki, K., Fuyuto, T., Nishikawa, K., Nakakita, K. et al. , “Dual-Fuel PCI Combustion Controlled by In-Cylinder Stratification of Ignitability,” SAE Technical Paper 2006-01-0028, 2006, doi:10.4271/2006-01-0028.
- Del Vesco, D., Kokjohn, S., and Reitz, R. , “The Effects of Charge Preparation, Fuel Stratification, and Premixed Fuel Chemistry on Reactivity Controlled Compression Ignition (RCCI) Combustion,” SAE Int. J. Engines 10(4):1491-1505, 2017, doi:10.4271/2017-01-0773.
- Martin, J., Boehman, A., Topkar, R., Chopra, S. et al. , “Intermediate Combustion Modes between Conventional Diesel and RCCI,” SAE Technical Paper 2018-01-0249, 2018, doi:10.4271/2018-01-0249.
- Abidin, Z., Florea, R., and Callahan, T. , “Dual Fuel Combustion Study Using 3D CFD Tool,” SAE Technical Paper 2016-01-0595, 2016, doi:10.4271/2016-01-0595.
- Owston, R., Magi, V., and Abraham, J. , “Wall Interactions of Hydrogen Flames Compared with Hydrocarbon Flames,” SAE Technical Paper 2007-01-1466, 2007, doi:10.4271/2007-01-1466.
- Florea, R., Neely, G., Abidin, Z., and Miwa, J. , “Efficiency and Emissions Characteristics of Partially Premixed Dual-Fuel Combustion by Co-Direct Injection of NG and Diesel Fuel (DI2),” SAE Technical Paper 2016-01-0779, 2016, doi:10.4271/2016-01-0779.
- Neely, G., Florea, R., Miwa, J., and Abidin, Z. , “Efficiency and Emissions Characteristics of Partially Premixed Dual-Fuel Combustion by Co-Direct Injection of NG and Diesel Fuel (DI2) - Part 2,” SAE Technical Paper 2017-01-0766, 2017, doi:10.4271/2017-01-0766.