Positive Displacement Type Clutch System, Power Transfer System Including Positive Displacement Type Clutch And Braking System, And Transmission System Including Multiple Positive Displacement Type Clutch System

A transmission system for changing a rotational speed of an input shaft connected with a power source into a desired rotational speed of an output shaft, the transmission system comprising:

• a plurality of clutch discs arranged with predetermined intervals on the input shaft and having disc vanes arranged with predetermined intervals on their outer sides;
• a plurality of clutch casings having different outer diameters, disposed on a driving shaft, housing the clutch discs, respectively, having teeth on their outer side, and having a plurality of sections in cylinders divided by the disc vanes;
• a plurality of piston actuators formed on the clutch casings, having a piston roller that comes in contact with the clutch discs, and transmitting rotation of the clutch discs to the clutch casings or not, using compressive resistance between the piston rollers and any one of the disc vanes and vacuum resistance between the piston rollers and another one of the disc vanes;
• a plurality of magnetic members disposed in the clutch casings and connected with the piston actuators;
• a plurality of magnetic force generators disposed on the driving shaft between adjacent disc casings and operating the piston actuators by generating a magnetic force for acting with the magnetic members in the clutch casings;
• and
• a plurality of gears disposed on the output shaft, rolling on the clutch casings, respectively, and having different outer diameters.