Patent ID: 7455610

Claim:
A power transmission for a hybrid vehicle, comprising: an engine; a first shaft connected to the engine; a first planetary gear set disposed on the first shaft, said first gear set comprising a first ring gear, a first pinion gear, a first sun gear, and a first carrier; a first motor/generator unit connected to the first planetary gear set; a second shaft disposed in parallel with the first shaft, the second shaft having a mediate gear; a second planetary gear set having a second ring gear, a second pinion gear, a second sun gear, and a second carrier, the second gear set being disposed on the second shaft and externally gear-meshed with the first planetary gear set; a second motor/generator unit connected to the second shaft; and a differential unit having a final gear connected to the mediate gear of the second shaft, wherein the first and second ring gears are disposed so as to directly engage one another.