PLANETARY GEAR TRAIN OF AUTOMATIC TRANSMISSION FOR VEHICLES

摘要

A planetary gear train of an automatic transmission for vehicles may include an input shaft receiving power of an engine, an output shaft outputting shifted power of the engine, a first planetary gear set including first, second, and third rotational elements, a second planetary gear set including fourth, fifth, and sixth rotational elements, a third planetary gear set including seventh, eighth, and ninth rotational elements, a fourth planetary gear set including tenth, eleventh, and twelfth rotational elements, and seven control elements disposed between the rotational elements and at positions at which the rotational elements and a transmission housing are selectively connected.

主权项

1. A planetary gear train of an automatic transmission for vehicles, the planetary gear train comprising:
an input shaft receiving power of an engine; an output shaft outputting shifted power of the engine; a first planetary gear set including first, second, and third rotational elements; a second planetary gear set including fourth, fifth, and sixth rotational elements; a third planetary gear set including seventh, eighth, and ninth rotational elements; a fourth planetary gear set including tenth, eleventh, and twelfth rotational elements; and seven control elements disposed between the rotational elements and at positions at which the rotational elements and a transmission housing are selectively connected, wherein the input shaft is continuously connected to the first rotational element, the output shaft is continuously connected to the eleventh rotational element, the third rotational element is continuously connected to the fifth rotational element, the sixth rotational element is continuously connected to the seventh rotational element, the eighth rotational element is continuously connected to the twelfth rotational element, the ninth rotational element is continuously connected to the eleventh rotational element, the second rotational element is selectively connected to the input shaft through a portion of the control elements, and three control elements of the seven control elements are operated, such that ten advance speeds and at least one reverse speed are implemented.