Patent ID: 9726262
Date: 2017-08-08
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 torque; 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 third planetary gear set including a seventh rotation element, an eighth rotation element, and a ninth rotation element; a fourth planetary gear set including a tenth rotation element, an eleventh rotation element, and a twelfth rotation element; a first shaft connected to the first rotation element; a second shaft connecting the second rotation element to the fifth rotation element; a third shaft connecting the third rotation element to the eighth rotation element; a fourth shaft connecting the fourth rotation element to the seventh rotation element, selectively connectable to the second shaft, and directly connected to the input shaft; a fifth shaft connected to the sixth rotation element; a sixth shaft connecting the ninth rotation element to the eleventh rotation element; a seventh shaft connected to the tenth rotation element and selectively connectable to the second shaft; and an eighth shaft connected to the twelfth rotation element, selectively connectable to the third shaft, and directly connected to the output shaft.