CVT

Continuously Variable Transmission component

The CVT component models the Continuously Variable Transmission.  The CVT is a type of transmission that allows changes in gear ratio without the “bumps” experienced with discrete gear changes. Mechanically, a CVT has two conical pulleys, connected by a belt drive. Changes in ratio are effected by adjusting the gap between the two sides of the pulleys, thus changing the relative diameters of the pulley and hence the gear ratio.

Kinematic Equation

Ideal Case

Non-Ideal Case

Where

and ${S}_{r}$ is the slip number (user input), also the torque loss is defined as

where $\mathrm{\eta }$ is the torque efficiency (user input). Also

${\mathrm{\omega }}_{a}$ =

Connections

 Name Condition Description ID ${\mathrm{flange}}_{a}$ - Flange to driver shaft flange_a ${\mathrm{flange}}_{b}$ - Flange to driven shaft flange_b r - Base (geometric) CVT ratio ratio $\mathrm{ideal}=\mathbf{false}$ Conditional real input port for the slip number slip_number $\mathrm{ideal}=\mathbf{false}$ Conditional real input port for the torque efficiency efficiency

Parameters

 Symbol Condition Default Units Description ID $\mathrm{ideal}$ - $\mathrm{true}$ - Defines whether the component is: true - ideal or false - non-ideal ideal