Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Continuously Variable Transmission Composed of a V-Belt Drive and a 2K-H II Type Differential Cear Unit

V-벨트식 변속장치와 2K-H ll형식 차등기어장치의 복합형 무단변속기

  • Published : 2002.08.01
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Abstract

As combining the functions of a 2K-H B type differential gear unit and a V-belt type continuously variable unit(CVU), 16 different mechanisms are presented. Some useful theoretical formula related to speed ratio, power flow and efficiency are derived and analyzed. Continuously variable transmission(CVT) mechanisms are proposed, which can of ffr a backward mode, a geared neutral, an underdrive mode and an overdrive mode. They are not required of a starting device as a torque converter. CVT mechanisms developed here present two distinct operating modes which are a power circulation mode and a power split mode. The transition of two modes takes place at the particular CVU speed ratio. For these CVT mechanisms, performance analysis related to speed ratio, power ratio and theoretical efficiency are executed.

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References

  1. Kim, M. S. and Choi, Y. D., 1992, 'Continuously Variable Transmission for Automobiles,' Journal of the KSME, Vol. 32, No. 10, pp. 858-866
  2. Beachley, N. H. and Frank, A. A., 1980, 'Principles and Definitions for Continuously Variable Transmissions with Emphasis on Automotive Application,' ASME Paper 80-C2 /DET-95
  3. Macmillan, R. H., 1961, 'Power Flow and Loss In Differential Mechanisms,' Journal of Mechanical Engineering Science, Vol. 3, No. 1, pp. 37-41 https://doi.org/10.1243/JMES_JOUR_1961_003_007_02
  4. Macmillan, R. H. and Davies, P. B., 1965, 'Analytical Study of Systems for Bifurcated Power Transmission,' Journal of Mechanical Engineering Science, Vol. 7, No. 1, pp. 40-47 https://doi.org/10.1243/JMES_JOUR_1965_007_009_02
  5. White, G., 1967, 'Properties of Differential Transmission,' The Engineer, pp. 105-111
  6. Yu, D. and Beachley, N., 1985, 'On the Mechanical Efficiency of Differential Gearing,' ASME Journal of Mechanisms, Transmissions and Automation in Design, Vol. 107, pp. 61-67 https://doi.org/10.1115/1.3258696
  7. Zhang, Y. and Leduc, B., 1992, 'Efficiency Predetermination of Planetary Trains used as Continuously Variable Power Transmission,' European Journal of Mech. Eng., Vol. 37, No.3, pp. 169-173
  8. Wohl, R., Long, T., Mucino, V. H., and Smith, J. E., 1993, 'A Model for a Planetary-CVT Mechanism Analysis and Synthesis,' SAE Paper 930065
  9. Mucino, V. H. and Smith, J. E., 1994, 'Parametric Modeling and Analysis of a Planetary Gear-CVT Mechanism,' SAE Paper 940519
  10. Morozumi, M. and Kishi, S., 1997, 'A Mechanical Consideration on CVT with a Differential Gearing,' Mechanical Researches (Japanese), Vol. 49, No.5, pp. 570-578
  11. Kim, Y. S. and Choi, S. H., 2000, 'Power Flow and Efficiency of Input Coupled type CVT combined Differential Gear Unit,' Journal of KSPE, Vol. 17, No. 11, pp. 141-150
  12. Choi, S. H. and Kim, Y. S., 2000, 'Characteristics on the Output Coupled type CVT Combined Differential Gear Unit,' Journal of KSPE, Vol. 18, No.3, pp. 205-216
  13. Roberts, R. W., 1984, 'Continuously Variable Transmission with Synchronous shift,' US Patent No. 4589303
  14. Macey, J. P., 1986, 'Geared-Neutral Continuously Variable Transmission,' US Patent No. 4644820
  15. Hanachi, S., 1990, 'A Study of the Dynamics of a Split-Torque, Geared-Neutral Transmission Mechanism,' Journal of Mechanical Design, Vol. 112, pp. 261-270 https://doi.org/10.1115/1.2912603
  16. Morozumi, M., Kishi, S., Furukawa, Y. and Misawa, H., 1990, 'A Study of Variable Speed Transmission with Differential Gear,' Journal of Japan Automotive Technology Association, No. 46, pp. 45-49
  17. Kishi, S., Morozumi, M., Furukawa, Y., Misawa, H. and Miyata, H., 1992, 'A Study of a Variable Speed Transmission with a Hypocycloid Type Differential Gearing,' Journal of Japan Automotive technology Association, Vol. 23, No.2, pp. 91-96
  18. Kim, Y. S., Choi, S. U. and Choi, S. H., 2000, 'A Study on the Efficiency Analysis of 2K-H Type Planetary Gear Train,' Journal of KSPE, Vol. 17, No.3, pp. 200-207
  19. Morozumi, M., 1989, The Theory and Design Method for Planetary Gear Drive and Differential Gear Unit, Japanese Daily Industrial Paper, Tokyo, pp. 8-31
  20. Kim, M. S. and Choi, Y. D., 1992, 'Continuously Variable Transmission for Automobiles,' Journal of the KSME, Vol. 32, No. 10, pp. 858-866
  21. Beachley, N. H. and Frank, A. A., 1980, 'Principles and Definitions for Continuously Variable Transmissions with Emphasis on Automotive Application,' ASME Paper 80-C2 /DET-95
  22. Macmillan, R. H., 1961, 'Power Flow and Loss In Differential Mechanisms,' Journal of Mechanical Engineering Science, Vol. 3, No. 1, pp. 37-41 https://doi.org/10.1243/JMES_JOUR_1961_003_007_02
  23. Macmillan, R. H. and Davies, P. B., 1965, 'Analytical Study of Systems for Bifurcated Power Transmission,' Journal of Mechanical Engineering Science, Vol. 7, No. 1, pp. 40-47 https://doi.org/10.1243/JMES_JOUR_1965_007_009_02
  24. White, G., 1967, 'Properties of Differential Transmission,' The Engineer, pp. 105-111
  25. Yu, D. and Beachley, N., 1985, 'On the Mechanical Efficiency of Differential Gearing,' ASME Journal of Mechanisms, Transmissions and Automation in Design, Vol. 107, pp. 61-67 https://doi.org/10.1115/1.3258696
  26. Zhang, Y. and Leduc, B., 1992, 'Efficiency Predetermination of Planetary Trains used as Continuously Variable Power Transmission,' European Journal of Mech. Eng., Vol. 37, No.3, pp. 169-173
  27. Wohl, R., Long, T., Mucino, V. H., and Smith, J. E., 1993, 'A Model for a Planetary-CVT Mechanism Analysis and Synthesis,' SAE Paper 930065
  28. Mucino, V. H. and Smith, J. E., 1994, 'Parametric Modeling and Analysis of a Planetary Gear-CVT Mechanism,' SAE Paper 940519
  29. Morozumi, M. and Kishi, S., 1997, 'A Mechanical Consideration on CVT with a Differential Gearing,' Mechanical Researches (Japanese), Vol. 49, No.5, pp. 570-578
  30. Kim, Y. S. and Choi, S. H., 2000, 'Power Flow and Efficiency of Input Coupled type CVT combined Differential Gear Unit,' Journal of KSPE, Vol. 17, No. 11, pp. 141-150
  31. Choi, S. H. and Kim, Y. S., 2000, 'Characteristics on the Output Coupled type CVT Combined Differential Gear Unit,' Journal of KSPE, Vol. 18, No.3, pp. 205-216
  32. Roberts, R. W., 1984, 'Continuously Variable Transmission with Synchronous shift,' US Patent No. 4589303
  33. Macey, J. P., 1986, 'Geared-Neutral Continuously Variable Transmission,' US Patent No. 4644820
  34. Hanachi, S., 1990, 'A Study of the Dynamics of a Split-Torque, Geared-Neutral Transmission Mechanism,' Journal of Mechanical Design, Vol. 112, pp. 261-270 https://doi.org/10.1115/1.2912603
  35. Morozumi, M., Kishi, S., Furukawa, Y. and Misawa, H., 1990, 'A Study of Variable Speed Transmission with Differential Gear,' Journal of Japan Automotive Technology Association, No. 46, pp. 45-49
  36. Kishi, S., Morozumi, M., Furukawa, Y., Misawa, H. and Miyata, H., 1992, 'A Study of a Variable Speed Transmission with a Hypocycloid Type Differential Gearing,' Journal of Japan Automotive technology Association, Vol. 23, No.2, pp. 91-96
  37. Kim, Y. S., Choi, S. U. and Choi, S. H., 2000, 'A Study on the Efficiency Analysis of 2K-H Type Planetary Gear Train,' Journal of KSPE, Vol. 17, No.3, pp. 200-207
  38. Morozumi, M., 1989, The Theory and Design Method for Planetary Gear Drive and Differential Gear Unit, Japanese Daily Industrial Paper, Tokyo, pp. 8-31