Patent ID: 8364360

Claim:
An insertable four-wheel drive motor vehicle, comprising: an engine including a crankshaft; a pair of main driving wheels permanently connected to the crankshaft by interposition of a gearbox provided with at least one first clutch; a pair of secondary driving wheels; an insertable transmission system, which is adapted to connect the crankshaft also to the secondary driving wheels and comprises a second controllable clutch for transmitting a variable torque from zero to a maximum value; the second clutch on one end is mechanically connected directly to the crankshaft upstream of the gearbox and of the first clutch and on another end is mechanically connected to the secondary driving wheels; an electronic control unit for controlling the insertable transmission system by controlling actuation of the second clutch; and a number of first sensors, which are connected to the electronic control unit and detect a number of dynamic parameters of the motor vehicle, wherein the electronic control unit determines a percentage of motive torque to be transmitted to the secondary driving wheels according to the dynamic parameters of the motor vehicle detected by the first sensors.