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A Fast-Running Model of a Van Doorne (Push-Belt) CVT Including Belt Tension and Compression Compliance
Technical Paper
2012-01-0628
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Push-belt (or Van Doorne-type) CVT systems are used for power transmission in automotive applications, including notably in engine-transmission subsystems. In order to characterize the physics of a Van Doorne CVT, two modeling options are commonly used. High fidelity models track each push-belt block as well as the dynamics of the bands that connect the blocks. The main disadvantage of this technique lies in its large number of degrees of freedom and resulting long CPU time. A second approach relies on a lesser-fidelity model with few degrees of freedom that can subsequently be used in long simulations, e.g. vehicle drive-cycles. In this work, we review different modeling techniques at this modeling level, and propose a fast-running model that overcomes some of the limitations of lesser-fidelity models yet is still suitable for long simulations. Typical fast-running models enforce kinematic constraints between the pulleys, i.e. the CVT bands and blocks are assumed to be rigid. In order to overcome some of the limitations associated with a rigid CVT, a fast-running flexible variant is proposed. The model has been implemented within a general-purpose tool in which a complete vehicle system can be modeled. Several examples are analyzed to validate the proposed model. First, a validation example and also comparison of the rigid and elastic models are presented. Next, numerical and experimental results are compared for vehicle transients.
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Rodriguez, J., Brix, F., and Kumagai, T., "A Fast-Running Model of a Van Doorne (Push-Belt) CVT Including Belt Tension and Compression Compliance," SAE Technical Paper 2012-01-0628, 2012, https://doi.org/10.4271/2012-01-0628.Also In
References
- Saito, T. Okano, T. 2002 ABAQUS User's Conference Application of metal pushing v-belt stress simulation with CVT pulley stiffness
- Engelhardt, T. Friedrich, M. Geier, T. Lebrecht, W. Neumann, L. ULbrich, H. 2005 Int. J. Vehicle Systems Modelling and Testing 1 4 31 Modelling and optimisation of powertrains
- Brix, F. Hanggi, R. “Modelling and Simulation of the Dynamic Behavior of a Van Doorne CVT System,” SAE Technical Paper 2004-08-0311 2004
- Kobayashi, D. Mabuchi, Y. Katoh, Y. “A Study on the Torque Capacity of a Metal Pushing V-Belt for CVTs,” SAE Technical Paper 980822 1998 10.4271/980822
- Bonsen, B. Klaassen, T.W.G.L. Pulles, R.J. Simons, S.W.H. Steinbuch, M. Veenhuizen, P.A. 2005 Int. J. Vehicle Design 39 232 256 Performance optimisation of the push-belt CVT by variator slip control
- Kong, L. Parker, R.G. 2008 Mechanism and Machine Theory 43 171 185 Steady mechanics of layered, multi-band belt drives used in continuously variable transmissions (CVT)
- Johnson, K.L. 2001 Contact Mechanics Cambridge University Press New York
- Bechtel, S.E. Vohra, S. Jacob, K.I. Carlson, C.D. 2000 Journal of Applied Mechanics 67 197 206 The stretching and slipping of belts and fibers on pulleys
- De, C. Metsenaere 2004 Technical Report Number DCT-2004-76 Eindhoven Technical University Eindhoven Survey into CVT slip control potential using MATLAB Simulink simulation