Power transmission apparatus for hybrid vehicle

摘要

A power transmission apparatus for a hybrid vehicle. An engine output shaft and a motor output shaft are coupled to a primary shaft of a continuously variable transmission installed in the power transmission apparatus. An output clutch is disposed between an output transmission shaft coupled to a drive wheel and a secondary shaft in order to switch these shafts between a coupled state and a released state, and a drive changeover clutch is disposed between the primary shaft and the output transmission shaft in order to switch these shafts between a coupled state and a released state. In a direct coupling mode where the output clutch is released and the drive changeover clutch is coupled, an engine output is transmitted to the drive wheel without passing through the continuously variable transmission.

主权项

1. A power transmission apparatus for a hybrid vehicle that transmits an engine output and a motor output to a drive wheel, the power transmission apparatus comprising:
a continuously variable transmission that includes a primary shaft coupled to an engine output shaft and a motor output shaft, and a secondary shaft to which a rotation of the primary shaft is transmitted after being varied continuously by a power transmission element; an output clutch that is disposed between an output transmission shaft coupled to the drive wheel and the secondary shaft in order to switch the secondary shaft and the output transmission shaft to a coupled state in which a coupling is formed therebetween and a released state in which the coupling is released; and a drive changeover clutch that is disposed between the primary shaft and the output transmission shaft in order to switch the primary shaft and the output transmission shaft to a coupled state in which a coupling is formed therebetween and a released state in which the coupling is released, wherein, in a direct coupling mode where the output clutch is released and the drive changeover clutch is coupled, at least one of the engine output and the motor output is transmitted to the drive wheel without passing through the continuously variable transmission, and wherein the primary shaft is coupled to one end of the motor output shaft, and the drive changeover clutch is coupled to another end of the motor output shaft.