A torque converter includes a turbine disposed in a hydrodynamic chamber. A bypass clutch has an apply chamber fluidly isolated from the hydrodynamic chamber. A first hydraulic passage is in fluid communication with the apply chamber. A variable-pitch stator including blades controllable by an actuator that has a chamber in fluid communication with the first hydraulic passage.

A method operates a drive train for driving a working machine with variable rotation speed. The method includes running up the electric drive machine from a standstill with evacuated hydrodynamic rotation speed/torque converter to a predefined value which indirectly characterizes the operating mode of the drive machine. Simultaneously with reaching the predefined value which indirectly characterizes the operating mode of the drive machine or with a temporal offset after reaching this, filling the hydrodynamic rotation speed/torque converter and driving the turbine vane wheel. Thereafter, the third element of the planetary gear mechanism is driven with a rotation speed which results from a superposition, defined by the planetary gear mechanism, of the rotation speed of the first element of the planetary gear mechanism connected to the electric drive machine and the rotation speed of the second element of the planetary gear mechanism which is indirectly connected to the turbine wheel.

A method operates a drive train for driving a working machine with variable rotation speed. The method includes running up the electric drive machine from a standstill with evacuated hydrodynamic rotation speed/torque converter to a predefined value which indirectly characterizes the operating mode of the drive machine. Simultaneously with reaching the predefined value which indirectly characterizes the operating mode of the drive machine or with a temporal offset after reaching this, filling the hydrodynamic rotation speed/torque converter and driving the turbine vane wheel. Thereafter, the third element of the planetary gear mechanism is driven with a rotation speed which results from a superposition, defined by the planetary gear mechanism, of the rotation speed of the first element of the planetary gear mechanism connected to the electric drive machine and the rotation speed of the second element of the planetary gear mechanism which is indirectly connected to the turbine wheel.

A torque converter stator includes a hub, an outer ring, a plurality of blades, and a plurality of spokes. The hub is disposed about an axis. The blades are disposed radially between the outer ring and the hub. All of the blades are pivotable relative to the hub and outer ring. The spokes are spaced apart from the blades and fixed to the hub and the outer ring to support the outer ring relative to the hub.

A torque converter stator includes a hub, an outer ring, a plurality of blades, and a plurality of spokes. The hub is disposed about an axis. The blades are disposed radially between the outer ring and the hub. All of the blades are pivotable relative to the hub and outer ring. The spokes are spaced apart from the blades and fixed to the hub and the outer ring to support the outer ring relative to the hub.

A vehicle comprises a hydromechanical automatic gearbox, an automatic gear shift unit (12) connected to a pressure fluid feeding pump (15). The gearbox comprises an input shaft (4) extending from an engine, gearing (23) extending to each gear step, wherein the gearing (23) is mounted on the input shaft (4) and is as a central gear (2), located on the input shaft (4), meshing with gear wheels (3) of different gear steps having different diameters mounted on the input shaft (4) of a single hydraulic torque converter (5) comprising a pump (6) and a turbine (8) located accordingly on the input (4) and output (7) shafts thereof forming a flow path of pressure fluid, each of the hydraulic torque converter (5) is electronically and hydraulically linked to the gear shift unit (12) of the vehicle.

A method of operating a gas turbine engine. The method includes determining a first compressor non-dimensional rotational speed set point, determining a current first compressor rotational speed and first compressor inlet temperature, and transferring power between the first and second shafts such that the first shaft non-dimensional rotational speed matches the set point.

A method of operating a gas turbine engine. The method includes determining a first compressor non-dimensional rotational speed set point, determining a current first compressor rotational speed and first compressor inlet temperature, and transferring power between the first and second shafts such that the first shaft non-dimensional rotational speed matches the set point.

A torque converter stator includes a hub, an outer ring, a plurality of blades, and a plurality of spokes. The hub is disposed about an axis. The blades are disposed radially between the outer ring and the hub. All of the blades are pivotable relative to the hub and outer ring. The spokes are spaced apart from the blades and fixed to the hub and the outer ring to support the outer ring relative to the hub.

A torque converter stator includes a hub, an outer ring, a plurality of blades, and a plurality of spokes. The hub is disposed about an axis. The blades are disposed radially between the outer ring and the hub. All of the blades are pivotable relative to the hub and outer ring. The spokes are spaced apart from the blades and fixed to the hub and the outer ring to support the outer ring relative to the hub.