GRUPPO PROPULSORE COMPATTO PER MEZZI DI TRASPORTO

A compact powertrain, comprises a first engine and a second engine and means for rotationally connecting said engines to a common output shaft; the engines have drive shafts with axles parallel to each other; connection means between said drive shafts and an output shaft, moreover, they comprise first coupling means on said first drive shaft for connecting said first drive shaft to the output shaft, and second coupling means for connecting said second drive shaft to said output shaft; the delivery of the rotational torque and power is controlled by the adjustment of each engine and said coupling means, being adapted to selectively connect/disconnect said drive shafts from said output shaft; the means for connecting the rotation of the two engines, left and right, to the output shaft comprise a clutch assembly and a gearbox; the clutch assembly is provided with a single clutch for drive shaft which connects or disconnects the respective drive shaft with a corresponding input and transmission shaft inside the gearbox; the common output shaft, of the rotation from the compact powertrain, rotates receiving motion by means of pairs of gears present respectively on one said transmission shaft, inside the gearbox, and on the output shaft, with the selective insertion or disengagement of the clutches and, depending on the rotational speed, of coupling engagements on the transmission shafts and of said gears present on said shafts; and it has one or more idle gears on the output shaft controlled by the rotation with at least one coupling engagement to the output shaft to receive the rotation, with the engagement inserted, or, when disengaged, transmit the rotation from one transmission shaft towards the other transmission shaft without any action on the output shaft.Entirely endothermic, hybrid or electrical embodiments are described for both land vehicles of all kinds and boats.