A Study on the Correction Factor of Flow Angel by using the One Dimentional Performance Model of Torque Converter

토크 컨버터의 1차원 성능 모델을 이용한 유동 각도 보정 계수에 관한 연구

  • Im, Won-Sik
  • 임원식
  • Published : 2000.02.01


One dimensional performance model has been used for the design of torque converter. The model is based on the concept of constant mean flow path and constant flow angle. These constant-assumed para meters make the design procedure to be simple. In practice, some parameters are usually replaced with geometric raw data and, the constant experiential correction factors have been used to minimize the design error. These factors have no definite physical meaning and so they cannot be applied confidently to the other design condition. In this study, the detail dynamic model of torque converter is presented to establish the theoretical background of correction factors. To verify the validity of theoretical model, steady state performance test was carried out on the several input speed. The oil temperature effect on the performance is analysed and adjusted. The constant equivalent flow angles are determined at a part of performance region by comparing the theoretical model and the test data. The sensitivity of correction factors to the input speeds are studied and the change of torus flow is presented.


Torque Converter;Mean Flow Path;Torus Flow;Equivalent Parameter;Flow Angle


  1. Hisashi, Watanabe, Testsuo Kurahashi and Masahiro Kojima, 'Flow Visualization and Measurement of Torque Converter Stator Blades Using a Laser Sheet Lighting Method and a Laser Doppler Velocimeter,' SAE 970680
  2. Tomoo Ishihara, 1985, Selected Papers on Automatic Power Transmission, pp. 46-55
  3. 임원식, 1997, '토크 컨버터의 형상 분석,' 자동차공학회 논문집, 제5권, 제5호
  4. 장욱진, 임원식, 이장무, 1997, '등가 성능 모델을 이용한 토크 컨버터의 기초 설계에 관한 연구,' 대한기계학회논문집(A), 제21권, 제3호, pp. 369-377
  5. Press, William H., Flannery, Brian P., Teukolsky, Saul A. and Vettering, William T., 1986, Numerical Recipes, pp. 274-334, Cambirdge University Press
  6. Hrovat, D. and Tobler, W. E., 1985, 'Bond Graph Modeling and Computer Simulation of Automotive Torque Converter,' J. of Franklin Institute, Vol. 391 No. 1/2, pp. 93-114
  7. Robert R. By and John E. Mahoney, 'Technology Needs for the Automotive Torque Converter-Part 1 : Internal Flow, Blade Design and Performance,' SAE 880482
  8. Tomoo Ishihara, 1983, 'An Experimental Analysis of Fluid Flow in a Torque Converter,' SAE 830571
  9. 임원식, 1995, '토크 컨버터의 해석/설계와 자동 변속장치의 동특성에 관한 연구,' 서울대학교 공학박사 학위 논문
  10. Tomoo Ishihara and Emori, R. l., 'Torque Converter as a vibration Damper and Its Transient Characteristics,' SAE 660368
  11. 1994, Design Practices : Passenger Car Automatic Transmission, Third Edition, SAE-18, SAE