Electrical machines with separately integrated starter ring gear and transmission coupler

An engine system comprising:

• an engine block comprising a crankshaft;
• and
• an electric machine assembly operatively coupled with the engine block, the electric machine assembly comprising:
• a stator;
• a rotor fixedly coupled with the crankshaft and movably coupled with the stator;
• a starter ring gear component fixedly coupled with the crankshaft and the rotor on a first side of the stator;
• and
• a transmission coupler fixedly coupled with the rotor on a second side of the stator opposite from the first side.

A method of assembling an engine system, the method comprising:

• attaching an electric machine assembly housing to an engine block;
• fixedly coupling a starter ring gear component with a crankshaft of the engine block;
• fixedly coupling a stator within the assembly housing;
• fixedly coupling a rotor with the starter ring gear component on a first side of the rotor and rotatably coupling the rotor with the stator;
• and
• fixedly coupling a transmission coupler with the rotor on a second side of the rotor, the second side being opposite from the first side.