Patent ID: 7582033

Claim:
A power-splitting infinitely variable transmission, comprising: a primary power train on which there is disposed a compound gearset including a first epicyclic gearset and a second epicyclic gearset; a secondary power train provided with a third epicyclic gearset and a fourth epicyclic gearset associated with electric machines including a first electric machine and a second electric machine of an electric variator, and the first electric machine of the electric variator is connected to a first reducing stage coupled to a sun gear of the first epicyclic gearset and to a ring gear of the third epicyclic gearset; and a mode-changing system configured to selectively immobilize at least one spinning element of one of the epicyclic gearsets associated with one of the electric machines, such that at least one mode of operation of the infinitely variable transmission is selected among a plurality of modes of operation, wherein an internal combustion engine is connected via a second reducing stage to a ring gear of the first epicyclic gearset and to a planet carrier of the second epicyclic gearset of a gearbox.