한국자동차공학회논문집 (Transactions of the Korean Society of Automotive Engineers)

  • 제4권3호
  • /
  • Pages.102-111
  • /
  • 1996
  • /
  • 1225-6382(pISSN)
  • /
  • 2234-0149(eISSN)
한국자동차공학회 (The Korean Society of Automotive Engineers)
권호 표지

연료량 변조법에 의한 연료분사식 가솔린엔진의 공연비 제어

Modulated Fuel Feedback Control of a Fuel Injection SI Engine

  • 박경석 (서울대학교 대학원 기계공학과) ;
  • 박진일 (서울대학교 대학원 기계공학과) ;
  • 고상근 (서울대학교 기 계공학과) ;
  • 노승탁 (서울대학교 기계공학과) ;
  • 이종화 (아주대학교 기계공 학과)
  • 발행 : 1996.05.01
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초록

For the air-fuel ratio control in a fuel injection SI engine, the Jump-Ramp control algorithm has been widely adopted by using the on/off type oxygen sensor. But the Jump-Ramp control method has limitation on treating the frequency and amplitude of the air-fuel ratio oscillation. This study suggests another feedback control logic named modulated fuel feedback control, which has a concept of pre-tuned air-fuel ratio oscillation. In the modulation method, the oxygen sensor output is not treated as on/off signal but as analog signal for feedback. By using the modulation method, the frequency and the amplitude of air-fuel ratio oscillation can be adjustable to some extent for improving the conversion efficiency of the Three-Way Catalyst. The result shows that the performance of the modulation method is better than that Jump-Ramp control method in reducing the amplitude of the air-fuel ratio oscillation as well as in increasing the frequency of the air-fuel ratio oscillation.

키워드

참고문헌

  1. SAE paper 780654 Feedback Carburetor Control electronic Design for Improved System Performance McDonald, W. R.
  2. SAE paper 800826 A closed-Loop A/F Control Model for Internal Combustion engines Hamburg, D. R.;Shulman, M. A. A.
  3. SAE paper 800462 Three-Way Conversion Catalyst:Effects or Closed-Loop Feed-Back Control and Other Parameters on Catalst Effeiciency Falk, C. D.;Mooney, J. J
  4. SAE paper 872098 Improvement of Engine Emissions Over Three-Way Catatyst by Periodic Operations Mastunaga, S.;Yokota, K.;Muraki, H.;Fujitani Y.
  5. SAE paper 881597 Vehicle Control Strategies Effect on Catalyst Performance Adomaitics, J. R.;Heck, R. M.
  6. SAE paper 920234 Universal Air-Fuel Ratio Heated Gas Oxygen Sensor and Further Applications Yamada, T.;Hayakawa, N.;Kami, Y.;Kawai, T.
  7. SAE paper 940149 Automatic Control of Cylinder by Cylinder Air-Fuel Mixture Using a Proportional Exhaust Gas Sensor Bush, K. J.;Adams, N. J.;Dua, S.;Markyvech C. R.
  8. SAE paper 940373 Adaptive Air-Fuel Ratio Control of a Spark-Ignition Engine Ault, B. A.;Jones, B. K.;Powell, D.;Franklin, G. F.
  9. SAE paper 940376 Individual Cylinder Air-Fuel Ratio Feedback Control Using an Observer Hasegawa, Y.;Akazaki, S.;Komoriya, I.;Maki, H.;Nishimura, Y.;Hirota, T
  10. SAE paper 940377 Conventional Event Based Engine Control Hendricks, E.;Jensen, M.;Chevalier, A.;Vesterholm, T