Torque Converter

A torque converter, comprising:

• an impeller rotatable about an axis;
• a turbine positioned proximate the impeller and rotatable about the axis;
• a lock-up clutch configured for selectively adjusting between a closed configuration and an open configuration;
• and
• a torsional damper assembly comprising
• a damper piston driving plate positioned proximate the lock-up clutch, the damper piston driving plate coupled to the impeller such that the damper piston driving plate rotates with the impeller when the lock-up clutch is in the closed configuration;
• a damper housing driving plate coupled to the turbine such that the damper housing driving plate rotates with the turbine;
• a plurality of dampers, each damper of the plurality of dampers comprising a housing fixed to the damper housing driving plate and a piston coupled to the damper piston driving plate, each housing of the plurality of dampers defining a chamber with a magnetorheological fluid disposed within the chamber, each piston of the plurality of dampers also having a piston head disposed within the chamber of a respective housing of the plurality of dampers, each damper of the plurality of dampers also having an electromagnetic coil positioned such that a magnetic field from the electromagnetic coil adjusts a viscosity of the magnetorheological fluid within the chamber of the respective housing of the plurality of dampers.