Patent ID: 7128671

Claim:
A hybrid power system with an external auxiliary motor, comprising: a first power unit having a transmission box, and a primary shaft having two output ends projecting through said transmission box, with a first output end projecting beyond a first side of said transmission box and a second output end projecting beyond a second side of said transmission box opposite to said first side; a first transmission device having an input end driven by said first output end of said primary shaft and having a centrifugally-controlled clutch, and a secondary shaft, driven by said centrifugally-controlled clutch, that transmits torque to an axle of a vehicle; an electric power unit comprising an electric motor/generator/starter, a second transmission device having an input end connected to said second output end of said primary shaft and an output end connected to a driving shaft of said electric motor/generator/starter, and a rechargeable battery electrically connected to said electric motor/generator/starter; wherein said electric power unit has non-simultaneous alternative operating modes as a generator for charging said rechargeable battery, as an electric motor acting as said external auxiliary motor for driving said secondary shaft, and as a starter for starting the vehicle.