Coupling arrangement for a generator set

A generator set for use in a powertrain of a series hybrid electric vehicle, the generator set comprising an engine, a generator, and a coupling arrangement which couples the engine to the generator, the coupling arrangement comprising a gearset, wherein:

• the gearset is an epicyclic gearset comprising a ring gear, a sun gear, and one or more planetary gears;
• an outer circumference of the ring gear is same as in outer circumference of a flywheel of the engine, and the ring gear is axially fixed at the outer circumference of the flywheel;
• and
• the sun gear is connected to the generator.

A powertrain for a series hybrid vehicle, the powertrain comprising:

• a traction motor;
• an electrical energy storage device for supplying electrical power to the traction motor;
• and
• a generator set for supplying power to at least one of the traction motor and the electrical energy storage device,
• the generator set comprising an engine, a generator, and a coupling arrangement which couples the engine to the generator, the coupling arrangement comprising a gearset, wherein:
• the gearset is an epicyclic gearset comprising a ring gear, a sun gear, and one or more planetary gears;
• an outer circumference of the ring gear is same as an outer circumference of a flywheel of the engine, and the ring gear is axially fixed at the outer circumference of the flywheel;
• and
• the sun gear is connected to the generator.