Patent ID: 7128675

Claim:
A transmission for a vehicle, the transmission system comprising: an input member; an output member; a first node operatively connected to the input member; a second node operatively connected to the output member; a third node; a fourth node; a plurality of rotatable interconnecting members, one of said rotatable interconnecting members at least partially forming a mechanical first power path between the first node and the second node; one of said rotatable interconnecting members operatively interconnecting the first node and the third node; one of said rotatable interconnecting members operatively interconnecting the third node and the fourth node and at least partially forming a mechanical second power path; one of said rotatable interconnecting members operatively interconnecting the fourth node and the second node; a first motor/generator operatively connected to the third node, a second motor/generator operatively connected to the fourth node; and an energy storage device operatively interconnecting the first motor/generator and the second motor/generator such that the energy storage device and the first and second motor/generators at least partially form an electrical third power path between the third and fourth nodes.