Electro-mechanical drive unit and a powertrain

A powertrain comprising:

• an engine configured to produce an engine torque;
• an input member connected to the engine to receive the engine torque from the engine, and the input member is rotatable to transfer the engine torque;
• an output member coupled to the input member, and the output member is rotatable to transfer the engine torque;
• a first electric machine operable as a motor to produce motor torque that is transferred to the output member or as a generator to produce energy;
• a second electric machine operable as a motor to produce motor torque that is transferred to the output member or as a generator to produce energy;
• wherein the first and second electric machines are in electrical communication with each other;
• a hydrodynamic coupling apparatus including an impeller and a turbine fluidly connected to the impeller, and the input member is coupleable to the impeller to transfer the engine torque from the input member to the impeller such that the hydrodynamic coupling apparatus transfers the engine torque to the output member;
• and
• wherein the hydrodynamic coupling apparatus is coupled to one of the first and second electric machines to combine the engine torque transferred via the hydrodynamic coupling apparatus with the motor torque produced by the first and/or second electric machines when the first and/or second electric machines operate as the motor.