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Low Soot, Low NOx in a Heavy Duty Diesel Engine Using High Levels of EGR
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 24, 2005 by SAE International in United States
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The objective of the study presented here was to examine the possibility of simultaneously reducing soot and nitrogen oxide (NOx) emissions from a heavy duty diesel engine, using very high levels of EGR (exhaust gas recirculation). The investigation was carried out using a 2 litre DI single cylinder diesel engine. Two different EGR strategies were examined. One entailed maintaining a constant charge air pressure with a varied exhaust back pressure in order to change the amount of EGR. In the other strategy a constant pressure difference was maintained over the engine, resulting in different equivalence ratios at similar EGR levels.
EGR levels of 60 % or more significantly reduced both soot and NOx emissions at 25 % engine load with constant charge air pressure and increasing exhaust back pressure. However, combustion under these conditions was incomplete, resulting in high emissions of carbon monoxide (CO), unburned hydrocarbons (HC) and high fuel consumption. At 50 % engine load, it was not possible to reduce both soot and NOx emissions, with high levels of EGR resulting in increased soot emissions.
CitationAlriksson, M., Rente, T., and Denbratt, I., "Low Soot, Low NOx in a Heavy Duty Diesel Engine Using High Levels of EGR," SAE Technical Paper 2005-01-3836, 2005, https://doi.org/10.4271/2005-01-3836.
- Ciajolo, A., d'Anna, A., Barbella, R., Tregrossi, A and Violi, A., “The Effect of Temperature on Soot Inception in Premixed Ethylene Flames”, Twenty-Sixth Symposium (International) on Combustion, The Combustion Institute, 1996
- Kamimoto, T., and Bae M., “High Combustion Temperature for the Reduction of Particulate in Diesel Engines”, SAE paper 880423, 1988
- Bergman, M. and Golovitchev, V.I., “CFD Modeling of a Two-Stroke Free Piston Energy Converter using Detailed Chemistry”, 7:th International Conference on Engines for Automobile, SAE Neaples, ICE2005, Italy, September, 2005
- Ladommatos, N., Abdelhalim, S. and Zhao, H., “The Effects of Exhaust Gas Recirculation on Diesel Combustion and Emissions”, Int J Engine Research, 2000, vol 1, no 1, p. 107-126
- Heywood, J.B., “Internal Combustion Engine fundamentals”, 1988, Singapore, McGraw-Hill inc.
- Warnatz, J., Maas, U. and Dibble, R.W., “Combustion”, 1996, Germany, Springer-Verlag
- Kimura, S., Aoki, O., Ogawa, H., Muranaka, S., and Enomoto, Y., “New Combustion Concept for Ultra-Clean and High-Efficiency Small DI Diesel Engines”, SAE paper 1999-01-3681, 1999
- Ogawa, H., Kimura, S., Koike, M., and Enomoto, Y., “A Study of Heat Rejection and Combustion Characteristics of a Low-Temperature and Pre-mixed Combustion Concept Based on Measurement of Instantaneous Heat Flux in a Direct-Injection Diesel Engine”, SAE paper 2000-01-2792, 2000
- Walter, B., and Gatellier, B., “Development of the High Power NADI™ Concept Using Dual Mode Diesel Combustion to Achieve Zero NOx and Particulate Emissions”, SAE paper 2002-01-1744, 2002
- Sasaki, S., Ito, T., and Iguchi, S., “Smoke-less Rich Combustion by Low Temperature Oxidation in Diesel Engines”, 9.Achener Kolloquium Fahrzeugund Motorentechnik, 2000, p. 767-788
- Gjirja, S., Olsson, E., Eklund, A. and Hedemalm, P., “A New Paraffinic Fuel Impact on Emissions and Combustion Characteristics of a Diesel Engine”, SAE paper 2002-01-2218, 2002
- Zheng, J., Miller, D., Cernansky, N., Liu, D., Zhao, X., and Zhang, M., “Some Observations on the Effects of EGR, Oxygen Concentration, and Engine Speed on the Homogenous Charge Combustion of n-heptane”, SAE paper 2004-01-1905, 2004
- Glassman, I., “Combustion”, 3rd edition, 1996, USA, Academic Press