Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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Effects of Combustion Chamber Shape on the Stratified Combustion of a GDI Engine

직접분사식 가솔린엔진의 연소실 형상이 성층화 연소에 미치는 영향

  • 송재원 (고등기술연구원 기계/의용기술센터) ;
  • 김미로 (고등기술연구원 기계/의용기술센터) ;
  • 조한승 (고등기술연구원 기계/의용기술센터) ;
  • 여진구 (고등기술연구원 기계/의용기술센터) ;
  • 조남효 (고등기술연구원 기계/의용기술센터)
  • Published : 2002.01.01
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Abstract

A study to investigate the influence of combustion chamber shape, especially piston top face configuration, on the combustion stability is presented with CFD analysis and single cylinder GDI engine test. Initial configuration of the piston bowl was designed with CFD analysis and further parametric studies of the design factors on the piston top face were carried out through the single cylinder GDI engine test. It was found that both the geometry of piston top face and the compression ratio have great influences on the combustion stability. Of interest is that the design factors of the GDI piston to prevent mixture diffusion out of the piston bowl have important roles for the stable combustion at the stratified mixture condition. Also the relationship between spray impingement and flow pattern in a GDI piston bowl should be considered to design an optimal bowl configuration for stable stratified combustion.

Keywords

References

  1. Y. Iwamoto et al., 'Combustion Control Technologies for Direct Injection SI Engine,' SAE 960600, 1996
  2. H. Nohira et al., 'Development of Toyota's Direct Injection Gasoline Engine,' AVL Engine and Environment Conference'97, 1997
  3. T. Itoh et al., 'Combustion Characteristics of a Direct Injection Stratified Charge SI Engine,' JSAE, Trans. Vol.19, No.3, 1998
  4. N. S. Jackson et al., 'Stratified and Homogeneous Charge Operation for Direct Injection Gasoline Engine - High Power with Low Fuel Consumption,' SAE 970543, 1997
  5. J. Geiger, et al., 'Direct Injection Gasoline Engine,'SAE 990170, 1997
  6. R. Houston, G. Casecart, 'Combuston and Emission Characteristics of Orbital Combustion Process Applied to Multi-Cylinder Automotive Direct Injected 4-Stroke Engine,' SAE 980153, 1998
  7. 조한승, 박태용, 박성진, 조남효, '가솔린 직접분사식엔진의 운전특성에 관한 연구,' 한국자동차공학회논문집, 제8권 제5호, pp.54-66, 2000
  8. 김미로, 조남효, '엔진실린더 내부 유동해석을 통한 정상유동 실험결과의 분석,' 한국자동차공학회 추계학술대회 논문집, Vol.I, pp.111-117, 1999
  9. Yong-Jin Kim, Sang H. Lee, Nam-Hyo Cho, 'Effect of Air Motion on Fuel Spray Characteristics in a Gasoline Direct Injection Engine, SAE 1999-01-0177, 1999
  10. 권의용, 조남효, '정적챔버내의 고압가솔린 인젝터의 연료분무 구조,' 한국자동차공학회논문집, 제8권 제4호, pp. 10-17, 2000