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

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지
DOI QR코드

DOI QR Code

Development of CVTs Composed of a 2K-H I Type Differential Gear Unit and a V-belt Drive

2K-H형 I 형식 차동기어장치와 V-belt 전동장치를 결합한 무단변속기의 개발

  • 김연수 (건국대학교 기계항공공학부) ;
  • 최상훈 (한국철도기술연구원, 경량전철연구팀)
  • Published : 2002.06.01
Download PDF
⟨ Previous Next ⟩

Abstract

Compound continuously variable transmission(CVT) mechanisms are proposed, which can offer a backward mode, a geared neutral, an underdrive mode and an overdrive mode. They are composed of a 2K-H I type differential gear unit, a V-belt type continuously variable unit(CVU), a few friction clutches and gears, and not required of a starting device as a torque converter. Compound 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 efficiency are executed and proven by experimental studies.

Keywords

References

  1. 김만식, 최영덕, 1992, '자동차용 무단변속기,' 대한기계학회지, 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. White, G., 1967, 'Properties of Differential Transmission,' The Engineer, pp. 105-111
  4. 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
  5. 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
  6. Wohl, R., Long, T., Mucino, V.H., and Smith, J.E., 1993, 'A Mxlel for a Planetary-CVf Mrllanism : Analysis and Synthesis,' SAE Paper 930065
  7. Mucino, V.H. and Smith, J.E., 1994, 'Parametric Modeling and Analysis of a Planetary Gear-CVT Mechanism,' SAE Paper 940519
  8. 兩角宗晴, 岸佐年, 1997, '差動齒車式 無段變速機の力學的考察,' 機械の硏究, 49卷, 5？, pp. 570-578
  9. 김연수, 최상훈, 2000, '차동기어장치를 적용한 입력축 연결방식 무단변속기의 동력흐름 및 효율해석에 관한 연구,' 한국정밀공학회지, 제17권, 제11호, pp. 141-150
  10. 최상훈, 김연수, 2000, '차동기어장치를 적용한 출력축 연결방식 무단변속기의 특성해석에 관한 연구,' 한국정밀공학회지, 제18권, 제3호, pp. 205-216
  11. Roberts, R.W., 1984, 'Continuously Variable Transmission with Synchronous shift,' US Patent No. 4589303
  12. Macey, J.P., 1986, 'Geared-Neutral Continuously Variable Transmission,' US Patent No. 4644820
  13. 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
  14. 岸佐年, 兩角宗晴, 占川豊, 三澤弘, 官田博文, 1992, 'ハイポサイクロイド型 差動齒車式 無段變速機の硏究,' 自動車技術會論文集, 23卷, 2？, pp. 91-96
  15. 김연수, 최성욱, 최상훈, 2000, '2K-H형 유성기어장치의 효율해석에 관한 연구,' 한국정밀공학회지, 제17권, 제3호, pp. 200-207