Patent ID: 8229653

Claim:
A power output apparatus for outputting power to a drive shaft, comprising: an internal combustion engine; an electric motor for inputting and outputting power; a triaxial power input/output unit that is mechanically connected to three shafts, including the drive shaft, an output shaft of the internal combustion engine, and a rotary shaft of the electric motor, in order to output power input into any two of the three shafts into a remaining shaft of the three shafts and output power input into any one of the three shafts into two remaining shafts of the three shafts; a chargeable/dischargeable storage unit that exchanges power with the electric motor and the generator; and a control unit that controls the internal combustion engine to perform an idle operation at a predetermined rotation speed, executes idle control amount learning, in which an idle control amount serving as a control amount obtained during the control is learned in accordance with establishment of a predetermined learning condition, within a range in which a rotation speed of the drive shaft is lower than a first speed, when the idle control amount learning is incomplete, and executes again the idle control amount learning within a range in which the rotation speed of the drive shaft is lower than a second speed, which is lower than the first speed, when the idle control amount learning is complete.