Patent ID: 8235854

Claim:
A power train for a hybrid vehicle comprising: a first planetary gear set that has at least four rotary elements; a second planetary gear set that has three rotary elements, one of which are at least disconnectably connected to the first planetary gear set; and a first brake that is configured to restrain rotation of one rotary element of the second planetary gear set, wherein at least two or more independent power sources and an output element are connected to the rotary elements of the first planetary gear set and the second planetary gear set, wherein the rotary element, the rotation of which is restrained by the first brake, of the second planetary gear set is disconnected or connected with a rotary element of the first planetary gear set by a first clutch, and the output element is connected to the rotary element, which is not connected with the rotary elements of the first planetary gear set, of the second planetary gear set, and wherein the power source comprises: an engine and a first motor generator that are connected to the first planetary gear set; and a second motor generator that is connected to the second planetary gear set, and wherein the first planetary gear set is a long pinion type planetary gear set having four rotary elements including a first sun gear and a third sun gear that are independently engaged with one long pinion, and two rotary elements, which are not connected to the engine and the first motor generator, of the first planetary gear set are at least disconnected or connected with the rotary elements of the second planetary gear set, and wherein the engine is connected to a first carrier of the first planetary gear set, the first motor generator is connected to a third sun gear of the first planetary gear set, the second motor generator is connected to a second sun gear of the second planetary gear set, the output element is connected to a second carrier of the second planetary gear set, the first brake is connected to a second ring gear of the second planetary gear set, and the first clutch is disposed between the first sun near of the first planetary gear set and the second ring near of the second planetary gear set.