Patent ID: 6561941
Filing Date: 2003-05-13
Classification: F16H

Abstract:
An infinite speed ratio transmission, comprising:a first shaft connected to an engine; a second shaft disposed in parallel with the first shaft; a fixed speed ratio transmission comprising a first rotating element supported free to rotate on the second shaft, the first rotating element outputting a rotation of the first shaft at a fixed speed ratio; a continuously variable transmission comprising a second rotating element fixed to the second shaft, the second rotating element outputting the rotation of the first shaft at an arbitrary speed ratio; a planetary gear set disposed between the first rotating element and the second rotating element on the second shaft, the planetary gear set comprising a sun gear joined to the second rotating element via the second shaft, a planet carrier joined to the first rotating element, and a ring gear which varies rotation direction and rotation speed according to a difference of a rotation speed of the sun gear and a rotation speed of the planet carrier; a final output member joined to the ring gear, the final output member being disposed between the planetary gear set and the second rotating element; a first clutch which can disengage and join the first rotating element and the planet carrier; and a second clutch which can join the second rotating element and the final output member.