MULTI-SPEED TORQUE FILLED TRANSMISSION

A multi-speed torque filled transmission (10) especially for a vehicle, comprises a power split device (11) having at least a first link (11a), a second link (11b) and a third link (11c) with a negative speed ratio between the second link (11b) and the third link (11c) when the first link (11a) is stopped, An input shaft (12) of the transmission (10) is connected to the first link (11a) of said power split device (11) and to a driving shaft of a prime mover (18). A shiftable first sub-transmission (14) with a first driveshaft (20) and a shiftable second sub-transmission (15) with a second driveshaft (22), each of the sub-transmissions (14, 15) provides a plurality of different gear ratios, wherein the first driveshaft (20) of the first sub-transmission (14) is connected to the first link (11a) of said power split device (11). The second driveshaft (22) of the second sub-transmission (15) is connected to the second link (11b) of said power split device (11). An intermediate shaft (13), is kinematically connected to a driven shaft (21, 24) of said sub-transmissions (14, 15). A controllable lock-up clutch (CL) interconnects any two links (11a, 11b) of said power split device (11). A passive torque fill device (35) is kinematically connected to the third link (11c) of said power split device (11). The transmission (10) further comprises a planetary range changer (40) with a first input shaft (40a) and a second input shaft (40b), connected to an output shaft (50) with at least two different gear ratios, wherein said intermediate shaft (13) is connected to at least one of the input shafts of the planetary range changer (40). A bypass driveline kinematically connects one of the driveshafts of the sub-transmissions to at least another one of the input shafts of the range changer with fixed gear ratio via controllable bypass clutch.