Patent ID: 6723016
Filing Date: 2004-04-20
Classification: F16H

Abstract:
A torque split infinitely variable transmission comprising:a continuously variable transmission connected to a unit input shaft of the infinitely variable transmission; a power recirculation mode reduction gear unit connected to the unit input shaft; a torque split mode reduction gear unit connected to the unit input shaft; a planetary gearset comprising: a first member coupled to an output shaft of the continuously variable transmission; a second member coupled to a common output shaft common to the power recirculation mode reduction gear unit and the torque split mode reduction gear unit; and a third member coupled to a unit output shaft of the infinitely variable transmission; a power recirculation mode clutch interleaved between an output member of the power recirculation mode reduction gear unit and the common output shaft, for inputting a torque greater than a torque through the unit input shaft into the continuously variable transmission when the power recirculation mode clutch is engaged; a torque split mode clutch interleaved between an output member of the torque split mode reduction gear unit and the common output shaft, for inputting a torque smaller than the torque through the unit input shaft into the continuously variable transmission when the torque split mode clutch is engaged; a direct mode clutch interleaved between the output shaft of the continuously variable transmission and the unit output shaft of the infinitely variable transmission, for inputting the torque through the unit input shaft into the continuously variable transmission when the direct mode clutch is engaged; and the power recirculation mode clutch, the direct mode clutch, and the torque split mode clutch being selectively engaged and disengaged for establishing either of a power recirculation mode, a direct mode, and a torque split mode.