TRANSMISSION APPARATUS FOR AN AUTOMATED MANUAL TRANSMISSION, POWER UNIT AND THE RELATED VEHICLE COMPRISING SAID APPARATUS

A transmission apparatus (8) for vehicles equipped with an automated manual transmission (12) comprising an automated manual transmission (12), provided with an input shaft (24) and an output shaft (28) wherein the input shaft (24) is configured to be selectively connected to an internal combustion engine (16),wherein the output shaft (28) is configured to be mechanically connected to at least one drive wheel (32) of a vehicle, an auxiliary electric machine (36) having an auxiliary shaft (40) and an auxiliary transmission (44) selectively connectable to the input shaft (24) and/or to the output shaft (28) of the automated manual transmission (12). The auxiliary transmission (44) comprises a single transmission selector (48) movable in three positions, wherein: - in a first upstream engagement position, a mechanical connection is made between the auxiliary shaft (40) of the auxiliary electric machine (36) and said input shaft (24), - in a second disengagement position, the auxiliary shaft (40) of the auxiliary electric machine (36) is mechanically disconnected from said input (24) and output (28) shafts, - in a third downstream engagement position, a mechanical connection is made between the auxiliary shaft (40) of the auxiliary electric machine (36) and said output shaft (28).