Abstract: “This paper is concerned with an experimental analysis of the shifting dynamic behavior of a chain continuously variable transmission (CVT) system. Firstly, the steady-state experiments are carried out for different speed ratio. After that, the transient responses of the CVT, the main interest of this paper, are analyzed in different conditions. The tests are performed for different step changes of the ratio of the drive and driven clamping forces and for different angular velocities of drive side. The results demonstrate that the speed ratio reaches high value for high steps; however this relation is nonlinear. Moreover, it is realized that the characteristic shifting response time of speed ratio decreases as the angular velocity of drive pulley increases until a limiting value is reached.”

Keywords: CVT, Shifting, Dynamics, Transient, Response