Journal of Mechanical Science and Technology

  • 제17권1호
  • /
  • Pages.146-156
  • /
  • 2003
  • /
  • 1738-494X(pISSN)
  • /
  • 1976-3824(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
권호 표지

An Analytical Study on the Performance Analysis of a Unit-In-jector System of a Diesel Engine

  • Kim, Chul-Ho (A/Professor, Department of Automotive Engineering, Seoul National University of Technology) ;
  • Lee, Jong-Soo (Graduate Student, Department of Automotive Engineering, Seoul National University of Technology)
  • 발행 : 2003.01.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

A numerical algorithm is developed to analyze the performance of a Unit-injector (UI) System for a diesel engine. The fundamental theory of the algorithm is based on the continuity equation of fluid dynamics. The loss factors that should be seriously regarded on the continuity equation are the compressibility effect of liquid fuel, the wall friction loss in high-pressure fuel lines of the system, the kinetic energy loss of fuel in the system, and the leakage of fuel out of the control volume. For an evaluation of the developed simulation algorithm, the calculation results are compared with the experimental outputs provided by the Technical Research Center of Doowon Precision Industry Co. (DPICO) ； the maximum pressure in the plunger chamber (P$\_$p/) and total amount of fuel injected into a cylinder per cycle (Q$\_$f/) at each operational condition. The result shows that the average error rate (%) of P$\_$p/ and Q$\_$f/ are 2.90% and 4.87%, respectively, in the specified operational conditions. Hence, it can be concluded that the analytical simulation algorithm developed in this study can be reasonably applied to the performance prediction of newly designed UI system.

키워드

참고문헌

  1. ASME Fluid Meters Research Committee, 1981, the ISO-ASME Orifice Coefficient Equation, Mech. Engr., pp. 44-45
  2. Heywood, J. B., 1988, Internal Combustion Engine Fundamentals, McGraw-Hill Book Company, pp. 491-566
  3. Ichihashi, I., Takaishi, T., Tosa, T. and Yoshinori N., Studies on Fundamental Characteristics Comparison of Unit Injector and Pump-Line-Nozzle Injection Systems, Mitsubishi Heavy Industries, Ltd.
  4. Irving Granet, P. E., 1996, Fluid Mechanics, 4th Edition, Pretice Hall
  5. Kim, C. H., 1995, 'Modelling of Mixed Gas Generation Processes in a Fuel Injection System of an S.I. Engine,' Ph. D. Thesis, The University of New South Wales
  6. Kim, C. H., 2001, 'Cycle Simulation for the Performance Prediction of a High Pressure Unit Injection System of a Diesel Engine,' KSAE Journal, Vol. 9, No. 1, pp. 63-74
  7. Kourementos, D. A., Hountalas, D. T. and Kouremenos, A. D., 1999, 'Development and Validation of a Detailed Fuel Injection System Simulation Model for Diesel Engines,' Intl. Congress and Exposition of SAE, 1999-01-0527, pp. 215-222
  8. Lee, J. K., et al, 1997, 'Development of Electronic Unit Injector for Diesel Engines,' Technical Report, Korean Ministry of Commerce, Industry and Energy, pp. 54-103
  9. Pulkrabek, W. W., 1997, Engineering Fundamentals of the Internal Combustion Engine, Prentice Hall International Inc., pp. 165-205
  10. Rose, J. W. and Cooper, J. R, 1977, Technical Data of fuel, Proceedings of 7th The British National Committee World Energy Conference, pp. 147-291
  11. Table Curve 2D v5.0 Trial Fit Program, 2001
  12. White, F. M., 1994, Fluid Mechanics, 3rd Edition, McGraw-Hill Book Company, pp. 314-326