Patent ID: 9587715
Date: 2017-03-07
CPC Classifications: F16H

Claim:
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 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; and a third planetary gear set including seventh, eighth, and ninth rotation elements, wherein: the first rotation element is directly connected to the seventh rotation element, the second rotation element is directly connected to the ninth rotation element, the fourth rotation element is directly connected to a transmission housing, the eighth rotation element is directly connected to the output shaft, the input shaft is selectively connected respectively to the first rotation element and the fifth rotation element, the second rotation element is selectively connected to the sixth rotation element, the third rotation element is selectively connected to the fifth rotation element and the sixth rotation element, respectively, and the ninth rotation element is selectively connected to the transmission housing.