A method of controlling a vehicle driving system adapted to accumulate power output intermittently from a thermal engine in a flywheel as rotational energy and only a necessary part of the accumulated energy is taken out to the output shaft of a power dividing type power transmission unit. Thermal engines to which the present invention is applicable include internal-combustion engines and external-combustion engines.

 
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< Self propelled trailer

> Drill energized power module

> Three-wheeled vehicle with centrally positioned motor and driver's seat

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