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Effect of Exhaust Gas Recirculation on Combustion and Odorous Emissions in Direct Injection Diesel Engines
Technical Paper
2008-01-2482
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This study investigated the effect of exhaust gas recirculation (EGR) on combustion and odorous emissions in a direct injection (DI) diesel engine. EGR up to 60% was examined in the engine start-up conditions as well as once the engine was stabilized. In emissions, exhaust odor, irritation, formaldehyde (HCHO) and total hydrocarbon (THC) are compared without or with different EGR rates. After engine warm-up, reduced exhaust odor and eye irritation are obtained at 30% and 60% EGR rates than no EGR in the outdoor assessment environment, although HCHO emission at 60% EGR rate is 50% higher than at 30% EGR rate or non EGR. Early in the engine start-up time, 60% EGR rate shows very high emissions of HCHO and THC. Combustion analysis is performed by taking cylinder pressures during combustion and analyzing heat release rates. Cylinder pressures at 1, 2, 4, 8, 16 and 32 minutes after engine start for different EGR rates are taken. There is no change in ignition delays between non EGR and 30% EGR rate. The ignition delay with 60% EGR rate early in the engine start-up time is 1-1.5°CA longer than non EGR or 30% EGR rate and main combustion takes place after top dead center (TDC). 60% EGR rate also showed lower combustion temperature. Longer ignition delay with lower combustion temperature and occurrence of main combustion after TDC are thought to be responsible for higher HCHO and THC emissions at 60% EGR rate.
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Citation
Roy, M., "Effect of Exhaust Gas Recirculation on Combustion and Odorous Emissions in Direct Injection Diesel Engines," SAE Technical Paper 2008-01-2482, 2008, https://doi.org/10.4271/2008-01-2482.Also In
References
- Ingram, C. 1978 “Diesel Exhaust Odor of Small, High Speed, Direct Injection Engines,” SAE paper 780114
- Tanaka, T. Kobashi, K. Sami, H. 1992 “Development of a Diesel Odor Measurement Method and Its Application to Odor Reduction,” SAE Paper 920726
- Roy, M. M. Tsunemoto, H. Ishitani, H. 1999 “Effect of Injection Timing and Fuel Properties on Exhaust Odor in DI Diesel Engines,” SAE Paper 1999-01-1531
- Mallamo, F. Badami, M. Millo, F. 2005 “Effect of Compression Ratio and Injection Pressure on Emissions and Fuel Consumption of a Small Displacement Common Rail Diesel Engine,” SAE Paper 2005-01-0379
- Uekusa, T. 2005 “Emission Reduction Study for Meeting New Requirements with Advanced Diesel Engine Technology,” SAE Paper 2005-01-2143
- Roy, M. M. 2006 “Effect of Engine Operation Parameters, Fuel Property and Exhaust Gas Treatment on Exhaust Odor in Direct Injection Diesel Engines,” Journal of Automobile Engineering Proceedings of the IMechE 220 5 595 609
- Ikegami, M. Ishiyama, T. Nakatani, K Ohtani, T. Nakai, S. 1998 “Effect of Exhaust Gas Recirculation and Injection Pressure on Exhaust Emissions from a Diesel Engine,” Proceedings of the Fourth International Symposium COMODIA 98 Kyoto 87 92
- Fukuda, M. Yamane, K. Neichi, T. Ikegami, M. 1998 “Reduction of Nitrogen Oxides of Diesel Engines by Exhaust-Gas-Selective Recirculation,” Proceedings of the Fourth International Symposium COMODIA 98 Kyoto 93 98
- Schubiger, R. Bertola, A. Boulouchos, K. 2001 “Influence of EGR on Combustion and Exhaust Emissions of Heavy Duty DI-Diesel Engines Equipped with Common-Rail Injection System,” SAE Paper 2001-01-3497
- Jacobs, T. Assanis, D. Filipi, Z. 2003 “The Impact of Exhaust Gas Recirculation on Performance and Emissions of a Heavy-Duty Diesel Engine,” SAE Paper 2003-01-1068
- Wenzel, S. J. Hansen, A. C. Yuan, W. 2006 “Combined Impact of Biodiesel and Exhaust Gas Recirculation on NOx Emissions,” Paper Number 066136 ASAE Annual Meeting
- Monteiro, E. M. 2007 “NOx Emissions Reduction in a Biodiesel Engine by Means of EGR Technology,” SAE Paper 2007-01-0078
- Owkita, T. Shigeta, Y. 1972 “Analysis Method of Low Concentration Gas and Bad Smell,” 117 215
- Roy, M. M. Tsunemoto, H. 2002 “Investigation of Odorous Components and Improvement in Odor Assessment Procedure in DI Diesel Engines,” SAE Paper 2002-01-2875
- Heywood, J. B. 1988 “Internal Combustion Engine Fundamental,” McGraw Hill International Editions 356 357