Patent ID: 8056659

Claim:
A power output apparatus configured to output power to a driveshaft, the power output apparatus comprising: an internal combustion engine; a first motor constructed to input and output power; a second motor constructed to input and output power; a power distribution integration mechanism configured to have a first element connecting with a rotating shaft of the first motor, a second element connecting with a rotating shaft of the second motor, and a third element connecting with an engine shaft of the internal combustion engine and arranged to allow mutually differential rotations of the three elements; and a speed change-transmission assembly constructed to include a transmission shaft, a first connection device arranged to selectively connect the first element and the second element of the power distribution integration mechanism to the transmission shaft, a speed change mechanism having an output element and an input element connected to the transmission shaft and configured to change speed of power from the transmission shaft at a preset speed ratio and output the power of the changed speed from the output element, and a second connection device arranged to selectively connect the output element of the speed change mechanism and at least one of the first element and the second element of the power distribution integration mechanism to the driveshaft.