Browse > Article
http://dx.doi.org/10.7467/KSAE.2014.22.7.090

Combustion and Emissions Characteristics of a Diesel Engine with the Variation of the HP/LP EGR Proportion  

Park, Youngsoo (Division of Mechanical Engineering, School of Mechanical, Aerospace & Systems Engineering, Korea Advanced Institute of Science & Technology)
Bae, Choongsik (Division of Mechanical Engineering, School of Mechanical, Aerospace & Systems Engineering, Korea Advanced Institute of Science & Technology)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.22, no.7, 2014 , pp. 90-97 More about this Journal
Abstract
The effects of high pressure and low pressure exhaust gas recirculation (HP/LP EGR) portion on diesel engine combustion and emissions characteristics were investigated in a 2.2 L passenger-car diesel engine. The po3rtion of HP/LP EGR was varied from 0 to 1 while fixing the mass flow rate of fresh air. The intake manifold temperature was lowered with the increasing of the portion of LP EGR, which led to the retardation of heat release by pilot injection. The lowered intake manifold temperature also resulted in low nitrogen oxide (NOx) emissions due to decreased in-cylinder temperature and prolonged ignition delay, however, the carbon monoxide (CO) emission showed opposite trend to NOx emissions. The brake specific fuel consumption (BSFC) was decreased as the portion of LP EGR increased due to lowered exhaust manifold pressure by wider open of turbocharger vane. Consequently, the trade-off relationship between NOx and BSFC could be improved by increasing the LP EGR portion.
Keywords
Diesel engine; High pressure exhaust gas recirculation; Low pressure EGR; Proportion of high and low pressure EGR; Variable geometry turbocharger;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 L. Zhang, "A Study of Pilot Injection in a DI Diesel Engine," SAE 1999-01-3493, 1999.
2 H. Lee, C. Jo, K. Nam, S. Lee and E. Lee, "Optimization of Low Pressure EGR of V6 3.0l Diesel Engine for $CO_2$ Reduction," KSAE Annual Conference Proceedings, pp.166-173, 2011.
3 Y. Jung, J. Jang, J. Park, C. Bae and D. Kim, "Reduction of Exhaust Emissions Using Various Injector Configurations in Low Temperature Diesel Combustion," Transactions of KSAE, Vol.19, No.4, pp.16-23, 2011.   과학기술학회마을
4 J. Lujan, B. Pla, S. Moroz and G. Bourgoin, "Effect of Low Pressure EGR on Gas Exchange Processes and Turbocharging of an HSDI Engine," Proceedings of the Conference on Thermo-and Fluid-dynamics Processes in Diesel Engines (THIESEL 2008), Valencia, Spain, Paper E.2.1, 2008.
5 K. Cho, M. Han, R. Wagner and C. Sluder, "Mixed-source EGR for Enabling High Efficiency Clean Combustion Modes in a Lightduty Diesel Engine," SAE Int. J. Engines, Vol.1, No.1, pp.457-465, 2009.
6 G. Zamboni and M. Capobianco, "Influence of High and Low Pressure EGR and VGT Control on In-cylinder Pressure Diagrams and Rate of Heat Release in an Automotive Turbocharged Diesel Engine," Appl. Ther. Eng., Vol.51, Issues 1-2, pp.586-596, 2013.   DOI   ScienceOn
7 A. Maiboom, X. Tauzia, S. Shah and J. Hetet, "Experimental Study of an LP EGR System on an Automotive Diesel Engine Compared to HP EGR with Respect to PM and NOx Emissions and Specific Fuel Consumption," SAE Int. J. Engines, Vol.2, No.2, pp.597-610, 2010.
8 D. Heuwetter, W. Glewen, C. Meyer, D. Foster, M. Andrie and R. Krieger, "Effects of Low Pressure EGR on Transient Air System Performance and Emissions for Low Temperature Diesel Combustion," SAE 2011-24-0062, 2011.
9 V. Bermudez, J. Lujan, B. Pla and W. Linares, "Effects of Low Pressure Exhaust Gas Recirculation on Regulated and Unregulated Gaseous Emissions during NEDC in a Light-duty Diesel Engine," Energy, Vol.36, Issue 9, pp.5655-5665, 2011.   DOI   ScienceOn
10 O. Vitek, J. Macek, M. Polasek, S. Schmerbeck and T. Kammerdiener, "Comparison of Different EGR Solutions," SAE 2008-01-0206, 2008.
11 M. V. Aken, F. Willems and D. Jong, "Appliance of High EGR Rates with a Short and Long Route EGR System on a Heavy Duty Diesel Engine," SAE 2007-01-0906, 2007.
12 S. Reifarth and H. Angstrom, "Transient EGR in a High-speed DI Diesel Engine for a Set of Different EGR-routings," SAE Int. J. Engines, Vol.3, No.1, pp.1071-1078, 2010.   DOI
13 G. Lim, Y. Choi, C. Park and J. Park, "Effects of HPL and LPL EGR Gas Mixed Supply on Combustion and Emissions in Automotive Diesel Engine," SAE 2011-01-1831, 2011.
14 F. Millo, P. Giacominetto and M. Bernardi, "Analysis of Different Exhaust Gas Recirculation Architectures for Passenger Car Diesel Engines," Appl. Energy, Vol.98, pp.79-91, 2012.   DOI   ScienceOn
15 A. Torregrosa, A. Broatch, A. Garcia and L. Monico, "Sensitivity of Combustion Noise and NOx and Soot Emissions to Pilot Injection in PCCI Diesel Engines," Appl. Energy, Vol.104, pp.149-157, 2013.   DOI   ScienceOn