| 摘要 |
Power generated by an alternator 2 and power generated by an electric motor 12 are controlled such that a power generation amount of either the alternator 2 or the electric motor 12, whichever has a higher power generation efficiency, becomes larger than a power generation amount of either the alternator 2 or the electric motor 12, whichever has a lower power generation efficiency. Consequently, power needed for power generation, that is, power consumed by an engine 1 can be decreased, thereby making it possible to improve the fuel economy of a vehicle.
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