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A Study on the Practicability of A Power Splitted Continuously Variable Transmission with Single Mode

단일 모드를 갖는 동력분기식 무단변속기의 실용성에 관한 연구

  • 성상훈 (부산대학교 기계기술연구소) ;
  • 박노길 (부산대학교 기계공학부) ;
  • 이형우 (부산대학교 기계설계과 대학원)
  • Published : 2007.01.31

Abstract

As a method to improve the poor torque capacity on the continuously variable transmission(CVT), power splitted devices(PSD) reducing the power entering into the transmission has been considered. But this kind of PSD requires for the variator to be a large coverage of the speed ratio (CSR) Since the CSRs of the well-known push belt or the toroidal ones are not enough large, the power splitted CVTs (PSCVTs) using them should be made with multiple modes. inevitably adding the do9 clutches and the associated accessories. In this paper a PSCVT with single mode is conceptually designed A new continuously variable unit (CVU) consisting of the paired inner and outer spherical rotors is used. The CVU has large CSR and excellent compactness. As a PSD. a variable bridge (VB) using the Planetary gear units (PGUs) is considered because it has an upper bound on the power ratio. An optimal design to minimize the effective efficiency of the PSCVT is carried out. Through the performance analysis on the designed model, good expectation on the practicability in the heavy vehicle system is shown.

Keywords

References

  1. Y. zhang, X. zhang, W. tobler, 'A Systematic Model For the Analysis of Contact, Side Slip, and Traction of Toroidal Drives', Journal of mechanical design, Vol. 122, pp. 523-528, 2000 https://doi.org/10.1115/1.1290248
  2. Yasuhiro Murakami, Yoshie Arakawa and Makoto Maeda, 'Development and Testing of CVT Fluid for Nissan Toroidal CVT', Society of Automotive Engineers, Inc, pp. 1-8, 1999
  3. J. Kim and K. H. Choi, 'Spin loss analyisis of friction drives: spherical and semi-spherical CVT', International Journal of Automotive Technology, Vol. 4, No. 4, pp. 165-172, 2003
  4. Masaki Nakano, Noboru Maruyama, 'Development of a Large Torque Capacity Half-toroidal CVT'. SAE international, 2000-01-0825, 2000
  5. Hisashi Machida, Yasuo Murakami, 'Development of the POWERTROS UNIT Half Toroidal CVT', Motion & control, Vol. 9, pp. 15-26, 2000
  6. Tanaka, H. and Machida, H., 'Halftoroidal traction-drive continuously variable power transmission', Journal of engineering tribology, Vol. 210, No. 3, pp. 205-212, 1996 https://doi.org/10.1243/PIME_PROC_1996_210_500_02
  7. Douglas R. Fussner, Yesh P. Singh, 'Design of Input Coupled Split Power Transmissions, Arrangements, and Their Characteristics', Transactions of the ASME, Vol. 126, May, pp. 542-550, 2004 https://doi.org/10.1115/1.1711825
  8. V. H. Mucino, Z. Lu, J. E. Smith, M. Kimcikiewicz and B. Cowan, 'Design of continuously variable power split transmission systems for automotive applications', Proc Instn Mech Engrs, Vol. 215 Part D, pp. 469-478, 2001 https://doi.org/10.1243/0954407011528086
  9. J. H. Ryu, Y. K. Kim, N. G. Park, 'A split power continuously variable transmissions(SPCVT) for bicycle use', Proc. SETC, 20024265(JSAE), October 29-31, Kyoto, Japan, 2002
  10. H. Ryu, S. H. Seong, N. G. Park, 'A continuously variable transmission having a four bar linkage and spherical rotors', Proc. 2002 KSAE Spring Conference, pp. 889-896, May 30-June 1, Jeju, Korea, 2002
  11. J. H. Ryu, S. H. Seong, N. G. Park,'An introduction of an infinitely variable transmission using concave and convex sphered traction drive for electric vehicle use', EVS19, pp. 1443-1450, October 19-23, Busan, Korea, 2002