Variator

A variator is a device that can change its parameters, or can change parameters of other devices.

Often a variator is a mechanical power transmission device that can change its gear ratio continuously (rather than in steps).

Examples

 * Beier variable-ratio gear
 * Continuously variable transmission
 * Evans friction cone
 * NuVinci continuously variable transmission
 * Variator (variable valve timing)
 * Variomatic
 * VANOS