HYBRID PROPULSION AND TRANSMISSION SYSTEM FOR MOTORCYCLES

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) is provided to overcome drawbacks of prior art propulsion and transmission systems. The system includes 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 or electronic connection means (16) or through second mechanical connection means (20), and coupled with the driving wheel (22) through second mechanical connection means (20). In this system, the engine (10) is independent from the wheels, thus guaranteeing maximum energy conditions for the entire propulsion system. The engine is capable of operating under conditions of maximum efficiency, with fuel savings and reduction of emission of polluting substances. L'invention concerne un système hybride de propulsion et de transmission pour un motocycle du type comprenant au moins un moteur à combustion interne (10) et au moins une roue motrice (22). Le système comprend une première machine électrique (14), comportant des premiers moyens de liaison mécanique (12) au moteur à combustion interne (10), et une seconde machine électrique (18), couplée à la première machine électrique (14) par des moyens de liaison électrique et/ou électronique (16) et/ou par des seconds moyens de liaison mécanique (20), et couplée à la roue motrice (22) par des seconds moyens de liaison mécanique (20).