A Study on the Effect of Compression Ratio and EGR on the Partial Premixed Diesel Compressed Ignition Combustion Engine Applied with the Split Injection Method

2단 분사방식을 적용한 부분 예혼합 디젤압축착화연소엔진의 성능에 미치는 압축비 및 EGR의 영향

  • 정재우 (자동차부품연구원 첨단동력/IT종합연구센터) ;
  • 강정호 (자동차부품연구원 첨단동력/IT종합연구센터) ;
  • 이성만 (자동차부품연구원 첨단동력/IT종합연구센터) ;
  • 강우 (자동차부품연구원 첨단동력/IT종합연구센터) ;
  • 김병수 (자동차부품연구원 첨단동력/IT종합연구센터)
  • Published : 2006.09.01

Abstract

Currently, due to the serious world-wide air pollution by substances emitted from vehicles, emission control is enforced more firmly and it is expected that the regulation requirements for emission will become more severe. A new concept combustion technology that can reduce the NOx and PM in relation to combustion is urgently required. Due to such social requirement, technologically advanced countries are making efforts to develop an environment-friendly vehicle engine at the nation-wide level in order to respond to the reinforced emission control. As a core combustion technology among new combustion technologies for the next generation engine, the homogenous charge compression ignition(HCCI) is expanding its application range by adopting multiple combustion mode, catalyst, direct fuel injection and partially premixed combustion. This study used a 2-staged injection method in order to apply the HCCI combustion method without significantly altering engine specifications in the aspect of multiple combustion mode and practicality by referring to the results of studies on the HCCI engine. In addition, this study confirmed the possibility of securing optimum fuel economy emission reduction in the IMEP 8bar range(which could not be achieved with existing partially premixed combustion) through forced charging, exhaust gas recirculation(EGR), compression ratio change and application of DOC catalyst.

Keywords

References

  1. R. Hasegawa and H. Yanagihara, 'HCCI Combustion in DI Diesel Engine,' SAE 2003-01-0745, 2003
  2. H. Yokota, H. Nakajima, T. Kakegawa and T. Suzuki, 'A New Concept for Low Emission Diesel Combustion,' SAE 970891, 1997
  3. H. Yokota, H. Nakajima and T. Kakegawa, 'A New Concept for Low Emission Diesel Combustion (2nd Rep.: Reduction of HC and CO Emission, and Improvement of Fuel Consumption by EGR and MTBE Blended Fuel),' SAE 981933, 1998
  4. J. W. Chung, J. H. Kang, B. S. Kim, W. Kang and H. C. Kim, 'A Study on the Diesel DI-HCCI Combustion Characteristics using 2-stage Injection Method,' Transactions of KSAE, Vol.12, No.6, pp.66-73, 2004