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 outputting changed torque, 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 compound planetary gear set formed by combining third and fourth planetary gear sets and including seventh, eighth, ninth, and tenth rotation elements, a fifth planetary gear set including eleventh, twelfth, and thirteenth rotation elements, and six friction elements disposed between any one rotation element among thirteen rotation elements and another rotation element or the input shaft, or between any one rotation element among the thirteen rotation elements and a transmission housing.

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 outputting changed torque; 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 compound planetary gear set formed by combining third and fourth planetary gear sets and including seventh, eighth, ninth, and tenth rotation elements; a fifth planetary gear set including eleventh, twelfth, and thirteenth rotation elements; and six friction elements disposed between any one rotation element among thirteen rotation elements and another rotation element or the input shaft, or between any one rotation element among the thirteen rotation elements and a transmission housing, wherein the input shaft is continuously connected to the fifth rotation element, the output shaft is continuously connected to the twelfth rotation element, the ninth rotation element is selectively connected to the input shaft through a first clutch, the tenth rotation element is continuously connected to the eleventh rotation element, the seventh rotation element is continuously connected to the sixth rotation element, the seventh rotation element is selectively connected to the twelfth rotation element so as to achieve a fifth forward speed stage, the eighth rotation element is selectively connected to the thirteenth rotation element so as to achieve a sixth forward speed stage, an eighth forward speed stage, and a reverse speed stage, and three friction elements among the six friction elements are operated so as to achieve nine forward speed stages and at least one reverse speed stage.