Bond graph dynamics of a rubber-belt continuously variable transmission
by Y.H. Hung, C.W. Hong
International Journal of Vehicle Design (IJVD), Vol. 35, No. 4, 2004

Abstract: This paper analyses the system dynamics of a rubber-belt continuously variable transmission (CVT), which is widely adopted in the modern scooter powertrain systems. Dynamic mathematical models were derived from the physical configuration of the CVT directly via a bond graph approach. The CVT mainly consists of a varying-diameter driving pulley and another flange-moveable driven pulley, interconnected by a V-shaped rubber belt. Effective belt diameters of both driving and driven pulleys are controlled by a speed governor and a torque regulator, respectively. Each component was functionally analysed, employing the field theory in the bond graph technique. Mathematical equations were derived and then solved on a Matlab platform. Both static and dynamic performance simulations were examined for future electronic control implementation.

Online publication date: Wed, 15-Sep-2004

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