Uploaded January 2017 | Updated September 2026, 38 minutes ago
As part of a cooperation with Bosch, our institute has been long working on the simulation and optimization of continuously variable transmissions (CVT). The video shows the circulation of an element in a push-belt variator. The results are taken from simulations.
An overview is shown on top while the detailed forces on one element can be seen at the bottom. The configuration is in Overdrive, that means the primary pulley (on the left) has a bigger radius than the secondary pulley (on the right).
Within the pulley, forces act on the flanks of the element that change due to non-linear effects (the deformation of the sheaves). Within the primary arc, the push-forces are build up due to the frictional forces to the sheaves.
After leaving the primary pulley, the element transmits a push-force (here mainly at the centre or at the rocking-edge) because of the applied torques. This force reduces in the secondary pulley due to friction with the pulley-sheaves. In the lower strand no push-force is transmitted, as an operational endplay is active (there is a gap between the elements).
As part of a cooperation with Bosch, our institute has been long working on the simulation and optimization of continuously variable transmissions (CVT). The video shows the circulation of an element in a push-belt variator. The results are taken from simulations.
An overview is shown on top while the detailed forces on one element can be seen at the bottom. The configuration is in Overdrive, that means the primary pulley (on the left) has a bigger radius than the secondary pulley (on the right).
Within the pulley, forces act on the flanks of the element that change due to non-linear effects (the deformation of the sheaves). Within the primary arc, the push-forces are build up due to the frictional forces to the sheaves.
After leaving the primary pulley, the element transmits a push-force (here mainly at the centre or at the rocking-edge) because of the applied torques. This force reduces in the secondary pulley due to friction with the pulley-sheaves. In the lower strand no push-force is transmitted, as an operational endplay is active (there is a gap between the elements).
