Experimental Performance Verifications for Compound CVT with Differential Gear


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For the designed and manufactured compound CVT that can improve the characteristics of efficiencies and power ratios, realize backward and forward motion including geared neutral without an auxiliary device, various experimental studies have been performed to verify their design validation and theoretical performance analysis. Various comparisons between the theoretical and the experimental results have verified that they can improve the efficiency and speed ratio when compared with the case power circulation mode mechanism and power split mechanism mode are used individually.



Key Engineering Materials (Volumes 326-328)

Edited by:

Soon-Bok Lee and Yun-Jae Kim






Y. S. Kim and J. M. Park, "Experimental Performance Verifications for Compound CVT with Differential Gear", Key Engineering Materials, Vols. 326-328, pp. 1325-1330, 2006

Online since:

December 2006




[1] N.H. Beachley and A.A. Frank: Principles and Definitions for Continuously Variable Transmissions with Emphasis on Automotive Application, ASME Paper 80-C2 /DET-95 (1980).

[2] G. White: Properties of Differential Transmission, The Engineer (1967), pp.105-111.

[3] D. Yu and N.H. Beachley: On the Mechanical Efficiency of Differential Gearing, ASME Journal of Mechanisms, Transmissions and Automation in Design, Vol. 107 (1985), pp.61-67.

DOI: 10.1115/1.3258696

[4] M. Morozumi and S. Kishi: A Mechanical Consideration on CVT with a Differential Gearing, Mechanical Researches (Japanese), Vol. 49, No. 5 (1997), pp.570-578.

[5] Y.S. Kim and S.H. Choi: Development of CVTs Composed of a 2K-H I Type Differential Gear Unit and a V-belt Drive, Tran. of the KSME(A), Vol. 26, No. 6 (2002), pp.1060-1068.

DOI: 10.3795/ksme-a.2002.26.6.1060

[6] Y.S. Kim and S.H. Choi: Continuously Variable Transmission Composed of a V-belt Drive and a 2K-H II type Differential Gear Unit, Tran. of the KSME(A), Vol. 26, No. 8 (2002), p.14951505.

[7] Y.S. Kim , J.M. Park, and S.H. Choi: Design of Compound CVT with 2K-H II type Differential Geart, Key Engineering Materials, Vol. 297-300 (2005), pp.332-338.

DOI: 10.4028/www.scientific.net/kem.297-300.332

[8] J.P. Macey: Geared-Neutral Continuously Variable Transmission, US Patent No. 4644820 (1986).

[9] M. Morozumi, S. Kishi, Y. Furukawa and H. Misawa: A Study of Variable Speed Transmission with Differential Gear, Journal of Japan Automotive technology Association, No. 46 (1992), p.45~49.

[10] M. Morozumi: The Theory and Design Method for Planetary Gear Drive and Differential Gear Unit, Japan Daily Industrial Paper, Tokyo(1989), pp.8-31.

[11] SAE J1618 AUG94 SAE Recommended Practice: Continuously Variable Transmission Test Code for Passenger Cars, p.29. 35-29. 40.

DOI: 10.4271/j1618_200004

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