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Prediction of CVT Transmission Efficiency by Metal V-Belt and Pulley Behavior with Feedback Control
Technical Paper
2010-01-0855
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
A simulation technology has been developed to predict the transmission efficiency of a metal pushing V-belt and pulleys that make up the drive system of a continuously variable transmission (CVT).
When a CVT operates in an actual vehicle, pulley thrust pressure is adjusted by feedback control to maintain a speed ratio. This feedback control has been implemented, for the first time, in an existing simulation that predicts the dynamic behavior of a metal V-belt using explicit structural analysis. The new simulation enables stable control of a target speed ratio when appropriate gains are set for each analysis condition. Using this simulation, the following values can be obtained: 1) pulley thrust pressure that is necessary for maintaining a specified speed ratio but could previously be derived only from physical testing, 2) transmission efficiency of a CVT drive system, consisting of a metal pushing V-belt and pulleys, at each operating condition, and 3) belt friction losses calculated from sliding velocities and friction forces applied to element contact surfaces.
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Authors
Citation
Saito, T. and Miyamoto, K., "Prediction of CVT Transmission Efficiency by Metal V-Belt and Pulley Behavior with Feedback Control," SAE Technical Paper 2010-01-0855, 2010, https://doi.org/10.4271/2010-01-0855.Also In
References
- Yamamoto, K. Sakaguchi, S. Kishida, M. Kimura, E. Abe, H. “Development of Integrated Engine-CVT Control System,” Honda R&D Technical review 11 1
- Akehurst, S. Vaughan, N. D. Parker, D. A. Simner, D. “Modelling of loss mechanisms in a pushing metal V-belt continuously variable transmission. Part 1: torque losses due to band friction,” Proc. Instn Mech. Engrs 218 Part D: J. Automobile Engineering
- Veenhuizen, P. A. Bonsen, B. Klaassen, T.W.G.L. Albers, P.H.W.M. Changenet, C. Poncy, S. “Pushbelt CVT efficiency improvement potential of servo-electromechanical actuation slip control,” 2004 CVT Congress
- Van der Noll, E. Van der Sluis, F. Van Dongen, T. Van der Velde. A. “Innovative Self-optimizing Clamping Force Strategy for the Pushbelt CVT,” SAE Int. J. of Engines 2 1 1489 1498 2009
- Narita, K. Priest, M. “Metal-metal friction characteristics and the transmission efficiency of a metal V-belt-type continuously variable transmission,” Proc. IMechE 221 Part J: J. Engineering Tribology
- Saito, T. “Application of Stress Simulation Under Transient Condition for Metal Pushing V-belt of CVT,” SAE Technical Paper, 2008-01-0415 2008
- Saito, T. Lewis, A. “Development of a Simulation Technique for CVT Metal Pushing V-belt with Feedback Control,” SAE Technical Paper, 2004-01-1326 2004