US Patent 8047321 Hybrid propulsion and transmission system for motorcycles

Herein described is a hybrid propulsion and transmission system for a motorcycle of the type comprising at least an internal combustion engine (10) and at least one driving wheel (22). The system comprises a first electric machine (14), provided with first mechanical connection means (12) to the internal combustion engine (10), and a second electric machine (18), coupled with first electric machine (14) through electric and/or electronic connection means (16) and/or through second mechanical connection means (20), and coupled with the driving wheel (22) through second mechanical connection means (20).