Patent ID: 9534669
Date: 2017-01-03
CPC Classifications: F16H

Claim:
1. A planetary gear train of claim of an automatic transmission for a vehicle, comprising: an input shaft configured to receive an engine torque; an output shaft configured to output a shifted torque; a first planetary gear set having first, second, and third rotational elements; a second planetary gear set having fourth, fifth, and sixth rotational elements; a third planetary gear set having seventh, eighth, and ninth rotational elements; a fourth planetary gear set having tenth, eleventh, and twelfth rotational elements; a first shaft connected with the first rotational element; a second shaft interconnecting the second rotational element, the fourth rotational element, and seventh rotational element, and directly connected with the input shaft; a third shaft interconnecting the third rotational element and the eleventh rotational element; a fourth shaft interconnecting the fifth rotational element and the ninth rotational element, and selectively connected with the third shaft; a fifth shaft connected with the sixth rotational element; a sixth shaft connected with the eighth rotational element; a seventh shaft connected with the tenth rotational element, and selectively connected with the fourth shaft and the fifth shaft respectively; and an eighth shaft connected with the twelfth rotational element, selectively connected with the sixth shaft, and directly connected with the output shaft.