Patent ID: 6569051
Filing Date: 2003-05-27
Classification: F16H,Y10T

Abstract:
An infinite speed ratio continuously variable transmission, comprising:an unit input shaft; a continuously variable transmission which transmits a rotation of the unit input shaft to a first output shaft at an arbitrary speed ratio; a fixed speed ratio transmission which transmits the rotation of the unit input shaft to a second output shaft at a fixed speed ratio; a direct mode clutch; a power recirculation mode clutch, one of the direct clutch and the power recirculation mode clutch comprising an electromagnetic two-way clutch that, when energized, transmits a drive force in a first direction and in a second direction opposite to the first direction, and when changed from the energized state to the non-energized state, transmits the drive force only in the direction of a drive force transmission at the change-over to non-excitation, and when the direction of the drive force transmission changes to an opposite direction, disengages, wherein the first and second directions refer to directions of transmission of drive force between a drive side and a non drive side; and a planetary gear set comprising a first rotation element joined to the first output shaft via the direct mode clutch, a second rotation element joined to the second output shaft via the power recirculation mode clutch, and a third rotation element which varies a rotation direction and a rotation speed according to a difference between a rotation speed of the first rotation element and a rotation speed of the second rotation element.