POWER TRANSMISSION UNIT

摘要

The invention relates to a power transmission unit (1) comprising at least one input (6) and one output (7); a starting element (8) arranged between the input (6) and the output (7); a transmission (45) arranged downstream from said starting element and comprising at least one rotational speed/torque conversion device; a housing (12); and a device which is used to prevent backward roll (2) and comprises at least one positive clutch (11) that can be synchronously actuated. Said positive clutch (11) is arranged between a fixed component or the housing (12) and a rotatable power-transmission element (14) or an element which is coupled to said power transmission element in a rotatably fixed manner, in a region of the power transmission unit (1) which is located between the output of the starting element (8) and the output (7) of the transmission (45).