PLANETARY GEAR TRAIN OF AUTOMATIC TRANSMISSION FOR VEHICLE

摘要

A planetary gear train of an automatic transmission for a vehicle may include an input shaft receiving torque of an engine, an output shaft configured to output changed torque of the engine, a first planetary gear set including first, second, and third rotation elements, a second planetary gear set including fourth, fifth, and sixth rotation elements, a third planetary gear set including seventh, eighth, and ninth rotation elements, and a fourth planetary gear set including tenth, eleventh, and twelfth rotation elements.

主权项

1. A planetary gear train of an automatic transmission for a vehicle, comprising:
an input shaft receiving torque of an engine; an output shaft configured to output changed torque of the engine; a first planetary gear set including first, second, and third rotation elements; a second planetary gear set including fourth, fifth, and sixth rotation elements; a third planetary gear set including seventh, eighth, and ninth rotation elements; and a fourth planetary gear set including tenth, eleventh, and twelfth rotation elements, wherein the input shaft is directly connected to the second rotation element, the output shaft is directly connected to the eleventh rotation element, the first rotation element is directly connected to the seventh rotation element, the sixth rotation element is directly connected to the tenth rotation element, the fifth rotation element is directly connected to the eighth rotation element, the ninth rotation element is directly connected to the eleventh rotation element, the first rotation element and the seventh rotation element are selectively connected respectively to the third rotation element and the fourth rotation element, the fifth rotation element and the eighth rotation element are selectively connected to the third rotation element, the third rotation element is selectively connected to the twelfth rotation element, the sixth rotation element and the tenth rotation element are selectively connected to a transmission housing, and the fourth rotation element is selectively connected to the transmission housing.