Patent ID: 8200385

Claim:
A power output apparatus comprising: an internal combustion engine; a generator for inputting and outputting power; a triaxial power input/output unit that is mechanically connected to three shafts, including a drive shaft, an output shaft of the internal combustion engine, and a rotary shaft of the generator, 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; an electric motor for inputting and outputting power to and from the drive shaft; a storage unit that exchanges power with the generator and the electric motor; a required driving force setting unit that sets a required driving force required by the drive shaft; and a control unit that controls the internal combustion engine, the generator, and the electric motor such that the set required driving force is output to the drive shaft, that learns an idle control amount, which is a control amount obtained during an idle operation of the internal combustion engine, in accordance with establishment of a predetermined learning condition when a rotation variation amount of the drive shaft is within a predetermined range including a value of zero, and that does not learn the idle control amount when the rotation variation amount of the drive shaft is not within the predetermined range.