Patent ID: 8701523

Claim:
A coupling device for a hybrid power plant of a vehicle having at least one wheel, the hybrid power plant operating in at least two electrical/internal-combustion-electrical and including at least one internal combustion engine and at least one electric motor, said coupling device comprising: a first drive shaft coupled to the electric motor, and a second drive shaft coupled to the internal combustion engine; at least one primary shaft configured to drive the at least one wheel of the vehicle, the primary shaft being selectively coupled by a first transmission and a second transmission to the first and second drive shafts, respectively, under the action of a mode selector having a first position and a second position, in such a way that: in the first position of the mode selector, the primary shaft is coupled to both the first drive shaft and the second drive shaft by first and second independent gear sets of the first transmission and the second transmission, respectively, and in the second position of the mode selector, the primary shaft is coupled to the first drive shaft by the first transmission and uncoupled from the second drive shaft by the second transmission so that the at least one electric motor drives the primary shaft by itself without assistance from the internal combustion engine.