Torque transmission device

An apparatus comprising:

• an exhaust gas turbine, and
• a torque transmission device including a first shaft and a second shaft, at least one roller bearing coaxially bearing the first shaft relative to the second shaft, and an adjusting device configured to vary an axial pressure force acting on the at least one roller bearing so as to adjust an amount of torque transmitted from the first shaft to the second shaft,
• wherein the exhaust gas turbine directly or indirectly drives the first shaft of the torque transmission device,
• wherein the at least one roller bearing comprises one of a toroidal bearing and an angular contact bearing,
• wherein the first shaft has a first axis of rotation and wherein the apparatus includes a housing having an interior;
• wherein the second shaft has a second axis of rotation parallel to the first axis of rotation and includes a piston wall perpendicular to the second axis of rotation, the piston wall being located in the interior of the housing,
• wherein the at least one roller bearing includes a first ring connected to the first shaft and a second ring connected to the second shaft, the at least one roller bearing being configured such that a torque transmitted from the first shaft and the second shaft increases when the second shaft moves in a first axial direction relative to the first shaft;
• the apparatus including a pressure chamber defined by a wall of the housing and by the piston wall, the piston wall being movable along the second axis relative to the first shaft;
• the apparatus including a pump for controlling fluid pressure in the pressure chamber;
• and
• wherein the adjusting device comprises a controller for controlling the pump and moving the piston wall by controlling the fluid pressure to change the axial position of the second shaft relative to the first shaft.

A torque transmission device comprising:

• a housing having an interior;
• a first shaft having a first axis of rotation, the first shaft projecting into the interior;
• a second shaft having a second axis of rotation and having a piston wall perpendicular to the second axis of rotation, the piston wall being located in the interior of the housing;
• at least one roller bearing coaxially bearing the first shaft relative to the second shaft, the at least one roller bearing including a first ring connected to the first shaft and a second ring connected to the second shaft, the at least one roller bearing being configured such that a torque transmitted from the first shaft and the second shaft increases when the second shaft moves in a first axial direction relative to the first shaft;
• a pressure chamber defined by a wall of the housing and by the piston wall, the piston wall being movable along the second axis relative to the first shaft;
• a pump for controlling a fluid pressure in the pressure chamber;
• and
• a controller for controlling the pump and moving the piston wall by controlling the fluid pressure to change the axial position of the piston wall relative to the wall of the housing.