Patent ID: 8840499

Claim:
A power transmitting system for hybrid vehicle comprising: first and second planetary gear mechanisms for power derivation, each having an input shaft, an output shaft and a pilot shaft, the first planetary gear mechanism ( 5 ) having a gear ratio dedicated to high vehicle speeds, the second planetary gear mechanism ( 4 ) having a gear ratio dedicated to low vehicle speeds; a selector ( 7 ) for choosing one of the first and second planetary gear mechanisms ( 4 ) or ( 5 ) to be in operation; an electric generator ( 3 ), capable of working as a motor, having a rotor coupled to a flywheel ( 85 ); an electric motor ( 2 ) able to absorb power from the generator ( 3 ) and work as a generator; a battery able to absorb or to restitute a balance of electric power from at least one of the electric generator and the electric motor; an engine ( 1 ) including an engine shaft; the input shafts of the first and second planetary gear mechanisms ( 4 ) and ( 5 ) are connected to the engine shaft ( 1 ) to receive power; the output shafts of the first and second planetary gear mechanisms ( 4 ) and ( 5 ) and the electric motor ( 2 ) are connected to an axle ( 6 ) which drives vehicle wheels; the selector ( 7 ) alternatively connects and disconnects each one the pilot shafts of the first and second planetary gear mechanisms ( 4 ) and ( 5 ) to the generator ( 3 ).