| 摘要 |
A power transmission system of a hybrid electric vehicle includes an input shaft, a first planetary gear set having a first rotation element, a second rotation element directly connected to the input shaft, and a third rotation element directly connected to a first motor/generator, a second planetary gear set having a fourth rotation element directly connected to the first rotation element and a second motor/generator, a fifth rotation element, and a sixth rotation element selectively connected to the second rotation element, an output gear connected to the fifth rotation element, a first clutch selectively connecting the engine with the input shaft, a second clutch selectively connecting the second rotation element with the sixth rotation element, a first brake interposed between the third rotation element and a transmission housing, and a second brake interposed between the sixth rotation element and the transmission housing.
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