Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
권호 표지

The Effect of Control of the VGT and EGR in a Turbocharged Common-Rail Diesel Engine on Emissions under Partial Loads Conditions

부분부하에서 커먼레일 과급 디젤엔진의 VGT와 EGR 제어가 배출물에 미치는 영향

  • 정수진 (자동차부품연구원 첨단동력/IT 종합연구센터) ;
  • 정재우 (자동차부품연구원 첨단동력/IT 종합연구센터) ;
  • 강정호 (자동차부품연구원 첨단동력/IT 종합연구센터) ;
  • 강우 (자동차부품연구원 첨단동력/IT 종합연구센터)
  • Published : 2007.11.01
Download PDF
⟨ Previous Next ⟩

Abstract

The static and dynamic behaviour of VGT and EGR systems has a significant impact on overall engine performance, fuel economy and exhaust emissions. This is because they define the state and composition of the air charge entering the engine. This work focused on the effect of the aperture ratio of VGT and EGR on the emission and flow characteristics under partial loads conditions. The investigation carried out using 2 liter PCCI 4 cylinder diesel engine with VGT and EGR. The result of this study shows that smoke increases with increasing EGR rate and NOx decreases with increasing EGR rate. It was also found that the residual gas contents greatly impact on soot emission under partial load condition. Finally, it can be concluded that VGT and EGR aperture ratio can greatly impact not only on soot and NOx but also air charging.

Keywords

References

  1. M. Sjoberg and J. E. Dec, 'Combined Effects of Fuel-Type and Engine Speed on Intake Temperature Requirements and Completeness of Bulk-Gas Reactions for HCCI Combustion,' SAE 2003-01-3173, 2003
  2. S. A. Lewis, J. M. Storey, B. Bunting and J. P. Szybist, 'Partial Oxidation Products and other Hydrocarbon Species in Diesel HCCI Exhaust,' SAE 2005-01-3737, 2005
  3. S. Park, S. Kook, C. Bae and J. Kim, 'Effect of EGR and Supercharging on the Diesel HCCI Combustion,' Transactions of KSAE, Vol.14, No.5, pp.58-64, 2006
  4. S.-J. Jeong, J.-W. Chung, W. Kang and W.-S. Kim, '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
  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. S.-J. Jeong, J.-W. Chung, J.-H. Kang and W. Kang, 'The Effect of EGR Pipe Configuration on EGR Characteristics of Diesel Engine with Variable Geometry Turbocharger,' Transactions of KSAE, Vol.15, No.2, pp.65-73, 2007
  9. M. Alriksson, T. Rente and I. Denbratt, 'Low Soot, Low NOx in a Heavy Duty Diesel Engine using High Levels of EGR,' SAE 2005-01- 3836, 2005
  10. H. Ogawa, T. Li, N. Miyamoto, S. Kido and H. Shimizu, 'Dependence of Ultra-High EGR and Low Temperature Diesel Combustion on Fuel Injection Conditions and Compression Ratio,' SAE 2006-01-3386, 2006