HYDRODYNAMIC-MECHANICAL MULTI-SPEED COMPOUND TRANSMISSION, ESPECIALLY A SIX-SPEED TORQUE-CONVERTER TRANSMISSION

摘要

The invention relates to a hydrodynamic-mechanical multi-speed compound transmission (i) with at least four speeds. Said transmission comprises a transmission input shaft (E) and a transmission output shaft (A) as well as a hydrodynamic transmission part (2) and a mechanical transmission part (4). The hydrodynamic and the mechanical transmission parts are connected in series when seen from the power flow direction. Means are provided for by-passing the hydrodynamic transmission part (2) during power transmission. The hydrodynamic transmission part (2) comprises at least one hydrodynamic speed-torque converter (3). The mechanical transmission part (4) includes a mechanical speed-torque converting device (5) with at least two planetary gear sets (7, 8). The mechanical transmission part (4) is designed in such a way that transmission ratios in the individual gear steps cause gear step jumps of phi 1.45 between two successive gear steps of the individual speeds. Various, optionally selective starting variants can be obtained by using different shifting element controls allocated to the theoretically possible speeds. Systematic gear step abandonment provides various gear variations using one gear, resulting in different final arrangements of the speeds.