Patent ID: 6324843
Filing Date: 2001-12-04
Classification: F16H

Abstract:
A hydraulic-mechanical type continuously variable transmission for a vehicle, comprising:a hydraulic pump having an input rotary member and a hydraulic motor having an output rotational axis, said hydraulic pump and said hydraulic motor being connected via a first oil passageway having a low oil pressure during a normal load operation, said first oil passageway having a high oil pressure during a reverse load operation and a second oil passageway having a high oil pressure during the normal load operation but having a low oil pressure during the reverse load operation;at least one of the hydraulic pump and the hydraulic motor having a variable capacity; anda one-way clutch provided between the input rotary member and the output rotational axis, said one-way clutch providing a coupling between the input rotary member and the output rotational axis as the number of rotations of the output rotational axis exceeds the number of rotations of the input rotary member during the reverse load operation of the engine.