Abstract: A continuously variable transmission (CVT) with a roller variator as an actuator for adjusting the speed ratio of the CVT. The CVT is of the variable-diameter pulley type and has first and second variable-diameter pulleys mechanically linked by a drive belt or other flexible drive member, the pulleys each having first and second relatively axially movable pulley portions. A roller variator is operatively connected to the first pulley, preferably the drive pulley, for control of its effective diameter. The roller variator has first and second disks mounted on the axis of the first pulley, a roller interconnecting the disks, and a roller support adapted to tilt the spin axis of the roller so as to change its points of contact with the disks and thereby change the speed ratio of the variator. The first disk is rotatably fixed with respect to the first pulley portion of the first pulley, for example, the pulley portion fixed to an engine shaft.

Abstract: An electrically assisted or actuated continuously variable transmission (CVT) with a first pulley having a first pulley portion for fixed connection to an engine shaft and an axially movable second pulley portion for placement about the engine shaft. A mechanism for assisting a mechanically-actuated CVT includes a nut connected to the movable portion and an electric motor having a screw that is engaged with the nut. The nut is moved axially by rotation of the screw with respect to the nut, assisting mechanical actuators in changing axial spacing between the pulley portions. A variable actuator for actuating a CVT includes a pair of disks coaxially engaged with the pulley portions, and a roller for contacting the disks at varying inclinations. An electric motor tilts the roller along the axis of rotation, causing the disks to rotate at differing rates to effect a change in axial spacing between the pulley portions.