Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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The Effect of EGR Pipe Configuration on EGR Characteristics of Diesel Engine with Variable Geometry Turbocharger

EGR관 형상이 가변형상 과급기를 장착한 디젤엔진의 EGR 특성에 미치는 영향

  • 정수진 (자동차부품연구원 첨단동력/IT 종합연구센터) ;
  • 정재우 (자동차부품연구원 첨단동력/IT 종합연구센터) ;
  • 강정호 (자동차부품연구원 첨단동력/IT 종합연구센터) ;
  • 강우 (자동차부품연구원 첨단동력/IT 종합연구센터)
  • Published : 2007.03.01
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Abstract

The use of an Exhaust Gas Recirculation(EGR) for a diesel engine with variable geometry turbocharger(VGT) has confronted how to obtain the amount of EGR for NOx reduction requirement at wide operating range and less side effect. Through a combined effort of modeling(wave action simulation) and experiment, an investigation into the effect of EGR area ratio and pipe length on EGR characteristics of common rail diesel engine with VGT has been performed. For accurate computation, calibration of constants involved in empirical and semi-empirical correlations has been performed at a specific operating point, before of its use for engine simulation. From the results of this study, it was found that EGR rate is sharply increased with increasing EGR area ratio until area ratio of 0.3. However, the effect of EGR area ratio on EGR rate is negligible beyond this criteria. This study also investigates the effect of EGR pipe length on a EGR amount and pulsating flow characteristics at EGR junction. The results showed that the longer EGR pipe length, the lower EGR amount was achieved due to the flow loss resulting in lower amplitude of pressure wave.

Keywords

References

  1. M. Zheng, G. T. Reader and J. G. Hawley, 'Diesel Engine Exhaust Gas Recirculation - A Review on Advanced and Novel Concepts,' Energy Conversion & Management, Vol.45, pp.883-900, 2004 https://doi.org/10.1016/S0196-8904(03)00194-8
  2. Jeong, S.-J., Chung, J.-W., Kang, W. and Kim, W.-S., 'A Study on the Effect of Exhaust System Configuration on Scavenging Characteristic of a Four-Cylinder Turbocharged Diesel Engine,' Transactions of KSAE, Vol.14, No.3, pp.35-43, 2006
  3. N. Cesario, C. Muscio, M. Farina, P. Amato and M. Lavorgna, 'Modeling the Rate of Heat Release in Common Rail Diesel Engine: A Soft Computing Approach,' SAE 2004-01-2967, 2004
  4. R. Kumar, G. T. Reader and M. Zheng, 'A Preliminary Study of Ignition Consistency and Heat Release Analysis for a Common-Rail Diesel Engine,' SAE 2004-01-0932, 2004
  5. R. S. Benson, 'The Thermodynamics and Gas Dynamics of Internal-Combustion Engines,' Vol.I, Oxford University Press, Oxford, 1982
  6. F. Payri, J. Benajes and M. Meyes, 'Modelling of Supercharger Turbines in Internal Combustion Engines,' Int. J. Mech. Sci., Vol.38, Nos.8-9, pp.853-869, 1996 https://doi.org/10.1016/0020-7403(95)00105-0
  7. Boost Users' Guide Ver. 4.0.4, AVL, 2004
  8. V. Mahieu, O. Berten, B. Leduc, L. D. Keyser and X. Jacquet, 'EGR Interfaces: Modeling to Experimental Data Comparison,' SAE 82695, 1998
  9. E. Mattarelli, G. M. Bianchi and D. Ivaldi, 'Experimental and Numerical Investigation on the EGR System of a New Automotive Diesel Engine,' SAE 2000-01-0224, 2000
  10. K. Deng, O. Masahiko and S. Nobuhisa, 'EGR Simulation of a Turbocharged Diesel Engine -EGR Control using CCS and Exhaust Manifold Pulsations,' JSAE Annual Congress (Autumn) Proceedings, No.950390, 1995
  11. H. Koichi, 'A Study on HCCI Gasoline Engine Supercharged by Exhaust Blow Down Pressure (2nd Report),' JSAE Annual Congress (Spring) Proceedings, No.20065045, 2006
  12. D. Mackey, L. Foley, C. McCartan, P. McEntee, R. Fleck and G. P. Blair, 'Simulation of a 1.9 Liter Direct Injection Turbocharged Diesel Engine at Part Load,' SAE 2003-01-1065, 2003
  13. R. M. Siewert, R. B. Krieger, M. S. Huebler, P. C. Baruah and B. Khalighi, 'Modifying an Intake Manifold to Improve Cylinder-to- Cylinder EGR Distribution in a DI Diesel Engine Using Combined CFD and Engine Experiments,' SAE 2001-01-3685
  14. L. L. C. Silva, 'Simulation of the Thermodynamic Processes in Diesel Cycle Internal Combustion Engine,' SAE 931899, 1993
  15. D. Gurney, 'The Design of Turbocharged Engines Using 1D Simulation,' SAE 2001-01-0576, 2001