POWER TRANSMISSION SYSTEM OF HYBRID ELECTRIC VEHICLE

摘要

A power transmission system of a hybrid electric vehicle which uses an engine and first and second motor/generators as power sources may include an input shaft receiving torque of the engine, an intermediate shaft parallel with and apart from the input shaft, an output shaft relatively rotatable with respect to the intermediate shaft, a first planetary gear set including a first rotation element, a second rotation element, and a third rotation element, a second planetary gear set including a fourth rotation element, a fifth rotation element, and a sixth rotation element, a first transfer gear connecting the second rotation element with the output shaft, a second transfer gear connecting the input shaft or the first rotation element with the sixth rotation element, and a first clutch selectively connecting two rotation elements among three rotation elements of the second planetary gear set.

主权项

1. A power transmission system of a hybrid electric vehicle comprising:
an engine; first and second motor/generators; an input shaft connected to and receiving torque of the engine; an intermediate shaft parallel with and apart from the input shaft; an output shaft parallel to and relatively rotatable with respect to the intermediate shaft; a first planetary gear set including a first rotation element connected to the first motor/generator, a second rotation element connected to the output shaft, and a third rotation element directly connected to the input shaft; a second planetary gear set including a fourth rotation element connected to the second motor/generator through the intermediate shaft, a fifth rotation element directly connected to the output shaft, and a sixth rotation element selectively connected to the input shaft or the first rotation element or selectively connected to a transmission housing; a first transfer gear connecting the second rotation element with the output shaft; a second transfer gear connecting the input shaft or the first rotation element with the sixth rotation element; and a first clutch selectively connecting two rotation elements among three rotation elements of the second planetary gear set.