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Emission Reduction using a Close Post Injection Strategy with a Modified Nozzle and Piston Bowl Geometry for a Heavy EGR Rate
Technical Paper
2012-01-0681
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
As EURO-6 regulations will be enforced in 2014, the reduction of NOx emission while maintaining low PM emission levels becomes an important topic in current diesel engine research. EGR is the most effective way to reduce the NOx emission because EGR has a dilution and thermal effect as a means to reduce the oxygen concentration and combustion temperature. Although EGR is useful in reducing the NOx emission, it suffers from a higher level of CO and THC emissions, which indicates a low combustion efficiency and poor fuel consumption. Therefore, in this research, a close post injection strategy, which is implemented using main injection and post injection, is introduced to improve combustion efficiency and to reduce PM emission under a high EGR rate. In addition, a modified hardware configuration using a double-row nozzle and a two-staged piston bowl geometry is adapted to improve the effect of the close post injection. As a result, the CO, THC and PM emissions were reduced up to half of what is seen in conventional cases, while holding the NOx emission level low due to a synergistic effect of the hardware combination and the close post injection strategy for diesel combustion with a large EGR rate.
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Authors
- Jeongwoo Lee - Seoul National Univ.
- Seungmok Choi - Seoul National Univ.
- Junyong Lee - Seoul National Univ.
- Seunghyup Shin - Seoul National Univ.
- Seunghyun Lee - Seoul National Univ.
- Han Ho Song - Seoul National Univ.
- Kyoungdoug Min - Seoul National Univ.
- Hoimyung Choi - Advanced Institutes of Convergence Tech.
Topic
Citation
Lee, J., Choi, S., Lee, J., Shin, S. et al., "Emission Reduction using a Close Post Injection Strategy with a Modified Nozzle and Piston Bowl Geometry for a Heavy EGR Rate," SAE Technical Paper 2012-01-0681, 2012, https://doi.org/10.4271/2012-01-0681.Also In
References
- Ladommatos, N. Abdelhalim, S. Zhao, H. Hu, Z. “The Dilution, Chemical, and Thermal Effects of Exhaust Gas Recirculation on Disesel Engine Emissions - Part 4: Effects of Carbon Dioxide and Water Vapour,” SAE Technical Paper 971660 1997 10.4271/971660
- Ladommatos, N. Abdelhalim, S. Zhao, H. Hu., Z. “Effects of EGR on Heat Release in Diesel Combustion,” SAE Technical Paper 980184 1998 10.4271/980184
- Maiboom, A. Tauzia, X. Hetet, J.F. Experimental study of various effects of exhaust gas recirculation (EGR) on combustion and emissions of an automotive direct injection diesel engine Energy 33 22 34 2008
- Hasegawa, R. Yanagihara, H. “HCCI Combustion in DI Diesel Engine,” SAE Technical Paper 2003-01-0745 2003 10.4271/2003-01-0745
- Kimura, S. Aoki, O. Ogawa, H. Muranaka, S. et al. “New Combustion Concept for Ultra-Clean and High-Efficiency Small DI Diesel Engines,” SAE Technical Paper 1999-01-3681 1999 10.4271/1999-01-3681
- Ladommatos, N. Balian, R. Horrocks, R. Cooper, L. “The Effect of Exhaust Gas Recirculation on Combustion and NOx Emissions in a High-Speed Direct-injection Diesel Engine,” SAE Technical Paper 960840 1996 10.4271/960840
- Ladommatos, N. Balian, R. Horrocks, R. Cooper, L. “The Effect of Exhaust Gas Recirculation on Soot Formation in a High-Speed Direct-injection Diesel Engine,” SAE Technical Paper 960841 1996 10.4271/960841
- Akihama, K. Takatori, Y. Inagaki, K. Sasaki, S. et al. “Mechanism of the Smokeless Rich Diesel Combustion by Reducing Temperature,” SAE Technical Paper 2001-01-0655 2001 10.4271/2001-01-0655
- Koci, C. Ra, Y. Krieger, R. Andrie, M. et al. “Detailed Unburned Hydrocarbon Investigations in a Highly-Dilute Diesel Low Temperature Combustion Regime,” SAE Int. J. Engines 2 1 858 879 2009 10.4271/2009-01-0928
- Horibe, N. Ishiyama, T. “Relations among NOx, Pressure Rise Rate, HC and CO in LTC Operation of a Diesel Engine,” SAE Technical Paper 2009-01-1443 2009 10.4271/2009-01-1443
- Helmantel, A. Golovitchev, V. “Injection Strategy Optimization for a Light Duty DI Diesel Engine in Medium Load Conditions with High EGR rates,” SAE Technical Paper 2009-01-1441 2009 10.4271/2009-01-1441
- Okude, K. Mori, K. Shiino, S. Yamada, K. et al. “Effects of Multiple Injections on Diesel Emission and Combustion Characteristics,” SAE Technical Paper 2007-01-4178 2007 10.4271/2007-01-4178
- Ehleskog, R. Ochoterena, R. Andersson, S. “Effects of Multiple Injections on Engine-Out Emission Levels Including Particulate Mass from an HSDI Diesel Engine,” SAE Technical Paper 2007-01-0910 2007 10.4271/2007-01-0910
- Lee, jeongwoo Choi, seungmok Shin, seunghyup Min, kyoungdoug Experimental Analysis of Emission Reduction by the Split Injection Strategy Using Close Post Injection with a Double-Row Nozzle in Heavy EGR Conditions Journal of Mechanical Science and Technology 2011
- Shin, seunghyup The Effects of the Combustion Chamber Shape and the Number of Nozzle Holes on Diesel Emissions The master's thesis of mechanical engineering Seoul National University 2011
- Benas, J. Molina, S. Novella, R. Amorim, R. Benhadjhaumadi, H. Hardy, J.P. Comparison of Two Injection System in an HSDI Diesel Engine Using Split Injection and Different Injector Nozzles International Journal of Automotive Technology 11 139 146 2010