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Shifting Mechanisms and Variation of Frictional Coefficients for CVT Using Metal Pushing V-Belts
Technical Paper
2000-01-0840
ISSN: 0148-7191, e-ISSN: 2688-3627
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Sector:
Event:
SAE 2000 World Congress
Language:
English
Abstract
In order to reveal the shifting mechanisms for CVT using a metal pushing V-belt, three shifting rates were introduced. The belt motion in the pulley groove was also characterized using mean coefficients of friction as parameters, which identify the slippage condition of the belt in the pulley groove. The experimental results showed that one of shifting rates, dR/ds was almost constant in the narrowing pulley regardless of both rotational speed and transmitted torque. Here, R is the belt pitch radius in the pulley and s is the length measured along the belt pitch line. This fact indicates that the shifting is primarily governed by elastic deformation of blocks of the belt.
Power transmitting states were also evaluated using a different type of lubricating oil whose nominal coefficient of friction was higher than that for the conventional AT oil. The observed mean coefficients of friction vary due to oil although the basic response of the CVT unchanged.
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Authors
Citation
Fujimura, O., Okubo, K., Fujii, T., and Kanehara, S., "Shifting Mechanisms and Variation of Frictional Coefficients for CVT Using Metal Pushing V-Belts," SAE Technical Paper 2000-01-0840, 2000, https://doi.org/10.4271/2000-01-0840.Also In
References
- Kanehara, S. et al. A Study on a Metal Pushing V-Belt Type CVT (Macroscopic Consideration for Coefficients of Friction between a Belt and Pulleys) Proceedings of JSAE CVT '96 Yokohama 1996 15 22
- Kanehara, S. et al. A Study on Metal Pushing V-Belt Type CVT (Characterization of Power Transmitting States of a CVT using Mean Coefficients of Friction as Parameters and their Application for CVT Design) Trans. of JSME 613 1997 291 298
- Ide, T. et al. Experimental Investigation on Shift Speed Characteristics of a Metal pushing V-Belt CVT Proceedings of JSAE CVT '96 Yokohama 1996 59 64
- Takahashi, A. et al. Investigation of Friction properties of Fluid for high Torque Capacity Belt CVT Proceedings of JSAE Spring Convention No.8-99 1999 5 8