Modeling of a Novel Dual-Belt Continuously Variable Transmission for Automobiles

Authors: Y. Q. Chen, P. K. Wong, Z. C. Xie, H. W. Wu, K. U. Chan, J., L. Huang

Abstract:

It is believed that continuously variable transmission (CVT) will dominate the automotive transmissions in the future. The most popular design is Van Doorne-s CVT with single metal pushing V-belt. However, it is only applicable to low power passenger cars because its major limitation is low torque capacity. Therefore, this research studies a novel dual-belt CVT system to overcome the limitation of traditional single-belt CVT, such that it can be applicable to the heavy-duty vehicles. This paper presents the mathematical model of the design and its experimental verification. Experimental and simulated results show that the model developed is valid and the proposed dual-belt CVT can really overcome the traditional limitation of single-belt Van Doorne-s CVT.

Keywords: Analytical model, CVT, Dual belts, Torque capacity.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1081497

References:

[1] K. Adachi, Y. Ochi, and K. Kanai, "Development of CVT control system and its use for fuel-efficient operation of engine," Asian Journal of Control, vol. 8, no. 3, pp. 219-226, 2006.
[2] S. Akehurst, N. Vaughan, D. Parker, and D. Simner, "Modelling of loss mechanisms in a pushing metal V-belt continuously variable transmission. Part 1: torque losses due to band friction," Proceedings of the Institution of Mechanical Engineers, Part D. Journal of Automobile Engineering, 218, no. 11, pp. 1269-1281, 2004.
[3] S. Akehurst, N. Vaughan, D. Parker and D. Simper, "Modelling of loss mechanisms in a pushing metal V-belt continuously variable transmission: Part 2: Pulley deflection losses and total torque loss validation," Proceedings of the Institution of Mechanical Engineers, Part D. Journal of Automobile Engineering, vol. 218, no. 11, pp. 1283-1293, 2004.
[4] S. Akehurst, N. Vaughan, D. Parker and D. Simper, "Modelling of loss mechanisms in a pushing metal V-belt continuously variable transmission. Part 3: belt slip losses," Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, vol. 218, no. 11, pp. 1295-1306, 2004.
[5] G. Carbone, L. Mangialardi and G. Mantriota, "The influence of pulley deformations on the shifting mechanism of metal belt CVT," Journal of Mechanical Design, vol. 127, no. 1, pp. 103-113, 2005.
[6] G. Carbone, L. Mangialardi, B. Bonsen, C. Tursi, and P. A. Veenhuizen, "CVT dynamics: Theory and experiments," Mechanism and Machine Theory, vol. 42, no. 4, pp. 409-428, 2007.
[7] K. U. Chan, P. K. Wong, H. W. Wu, "Preliminary Study on Design and Control of a Novel CVT", SAE Paper no. 2009-32-0011 and JSAE Paper no. 20097011, 2009.
[8] J. Micklem, D. Longmore and C. Burrows, "Belt torque loss in a steel V-belt continuously variable transmission," Proceedings of the Institution of Mechanical Engineers, Part D. Journal of Automobile Engineering, vol. 208, no. 2, pp. 91-97, 1994.