Hydrodynamic, mechanical multi-speed compound transmission

Abstract

The invention relates to a hydrodynamic-mechanical multi-speed compound transmission comprising a transmission input shaft (E) and an output. Said transmission contains a hydrodynamic transmission part ( ) having a hydrodynamic speed/torque converter ( ), and contains a mechanical transmission part ( ) connected downstream from said hydrodynamic transmission part ( ) in a spatial manner relative to the transmission input shaft (E). The inventive transmission also comprises at least one speed/torque converter device ( ). The mechanical speed/torque converter ( ) has at least two planetary gear trains a first planetary gear train ( ) and a second planetary gear train ( ) each comprising at least one sun gear, a ring gear, planetary gears, and a connecting element, whereby the planetary gear trains are designed and arranged such that an element of the first planetary gear train and of the second planetary gear train can be coupled at least indirectly to the transmission input shaft (E) or to an element of the hydrodynamic speed/torque converter ( ), and an additional second element of the planetary gear train ( ) is coupled in a rotationally fixed manner to another second element of the second planetary gear train ( ). This coupling forms the output of the mechanical speed/torque converter ( ), whereby the second element of the first planetary gear train and the second element of the second planetary gear train are each formed by the connecting element. The invention is characterized by the following features: The hydrodynamic speed/torque converter ( ) is of the single-stage and two-phase type and; the stator of the hydrodynamic speed/torque converter is coupled to the first planetary gearing of the mechanical speed/torque converter via a free-wheel.