To provide power output equipment having high efficiency and small in size.
A power outputted from an engine 50 to a crank shaft 56 is transmitted to a rotating shaft 57e with the number of revolutions increased and the torque decreased by a step-up gear 57 fitted to the crank shaft 56. A driving shaft 22 of a vehicle running at a constant speed is operated generally with higher revolutions and a lower torque than operating points where the engine 50 is efficient and, therefore, by making the power outputted from the engine 50, the one with the high revolutions and the low torque by the step-up gear 57, the electric energy interchanged between a clutch motor 30 and an assist motor 40 on the occasion of conversion of the torque by the two motors 30 and 40 can be made small. As the result, the loss in the two motors 30 and 40 can be lessened and small-sized motors can be used for them.
SHIOMI MASANAO
MATSUHASHI SHIGERU
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