한국자동차공학회논문집 (Transactions of the Korean Society of Automotive Engineers)

  • 제14권5호
  • /
  • Pages.25-31
  • /
  • 2006
  • /
  • 1225-6382(pISSN)
  • /
  • 2234-0149(eISSN)
한국자동차공학회 (The Korean Society of Automotive Engineers)
권호 표지

직접분사식 가솔린 엔진을 이용한 CAI 연소특성 및 운전영역 확대를 위한 성층 연소 특성에 관한 연구

A Study on the CAI Combustion Characteristics and Stratified Combustion to Extend the Operating Region Using Direct Injection Gasoline Engine

  • 발행 : 2006.09.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

Controlled Auto Ignition(CAI) combustion has great potential in achieving significant increase in engine efficiency, while simultaneously reducing exhaust emissions. The process itself involves the auto ignition and subsequent simultaneous combustion of a premixed charge. In this study, NVO(Negative Valve Overlap) system was applied to a CAI engine in order to use residual gas. The fuel was injected directly to the cylinder under the high temperature condition resulting from heating the intake port to initiate CAI combustion. This paper introduced the valve timing strategy and experimental set-up. From this study, the effect of engine speed and valve timing on CAI combustion and exhaust emissions was clarified. In addition, stratified charge method was used to extend CAI operating region.

키워드

참고문헌

  1. P. L. Kelly-Zion and J. E. Dec, 'A Computational Study of the Effect of Fuel-Type on Ignition Time in HCCI Engines,' The 2000 Symposium International on Combustion, Edinbergh Scotland, 2000
  2. R. H. Stanglmaier and C. E. Roberts, 'Homogeneous Charge Compression Ignition (HCCI): Benefits, Compromises, and Future Engine Application,' SAE 1999-01-3682, 1999
  3. B. Leach, H. Zhao, Y. Li and T. Ma, 'Control of CAI Combustion Through Injection Timing in a GDI Engine with an Air-Assisted Injector,' SAE 2005-01-0134, 2005
  4. J. Allen and D. Law, 'Advanced Combustion Using a Lotus Active Valve Train: Internal Exhaust Gas Recirculation Promoted Auto-Ignition,' Proceedings of the IFP International Congress 2001, pp.85-100, 2001
  5. T. Urushihara, K. HIraya, A. Kakuhou and T. Itoh, 'Expansion of HCCI Operation Region by the Combustion of Direct Fuel Injection, Negative Valve Overlap and Internal Fuel Reformation,' SAE 2003-01-0749, 2003
  6. Y. W. Woo, C. H. Lee, K. H. Lee and C. S. Lee, 'A Study on the Spray Characteristics for a Gasoline Direct Injector by Using Entropy Analysis and PIV Method,' KSME B, Vol.26, No.7, pp.1042-1054, 2002
  7. Y. H. Yoon, M. Y. Kim and C. S. Lee, 'Effect of Cooled-EGR on the Characteristics of Performance and Exhaust in a HCCI Diesel Engine,' Transaction of KSAE, Vol.13, No.5, pp.35-41, 2005
  8. K. H. Lee, V. Gopalakrishnan and J. Abraham, 'An investigation of the Effect of Changes in Engine Operating Conditions on Ignition in an HCCI Engine,' KSME International Journal, Vol.18, No.10, pp.1809-1818, 2004
  9. Z. Gao and W. Schreiber, 'The Effect of EGR and Split Fuel Injection on Diesel Engine Exhaust,' Int. J. Automotive Technology, Vol.2, No.4, pp.123-133, 2001