US 2018/0003270 A1 · PLANETARY GEAR TRAIN OF AUTOMATIC TRANSMISSION FOR VEHICLES

Abstract

A planetary gear train of an automatic transmission may include input shaft, output, first planetary gear set having first to third rotational elements, second planetary gear set having fourth to sixth rotational elements, third planetary gear set having seventh to ninth rotational elements, fourth planetary gear set having tenth to twelfth rotational elements, first shaft interconnecting the first and fourth rotational elements, and may be selectively connected with the input shaft or transmission housing, second shaft interconnecting the second rotational element, the sixth rotational element, the seventh rotational element, and the tenth rotational element connect, third shaft connected with the third rotational element, fourth shaft connected with the fifth rotational element, fifth shaft connected with the ninth rotational element, sixth shaft connected with the eighth rotational element and connected with the output shaft, a seventh shaft connected with the eleventh rotational element and connected with the input shaft, and eighth shaft connected with the twelfth rotational element and selectively connected with the respective third shaft and sixth shaft.

Claims10

Dependent claims

A planetary gear train of an automatic transmission for a vehicle, comprising:

an input shaft receiving an engine torque;
an output shaft outputting a shifted torque;
a first planetary gear set having first, second, and third rotation elements;
a second planetary gear set having fourth, fifth, and sixth rotation elements;
a third planetary gear set having seventh, eighth, and ninth rotation elements;
a fourth planetary gear set having tenth, eleventh, and twelfth rotation elements;
a first shaft interconnecting the first rotation element and the fourth rotation element, and is selectively connectable with the input shaft or a transmission housing;
a second shaft interconnecting the second rotation element, the sixth rotation element, the seventh rotation element, and the tenth rotation element connect;
a third shaft connected with the third rotation element;
a fourth shaft connected with the fifth rotation element;
a fifth shaft connected with the ninth rotation element;
a sixth shaft connected with the eighth rotation element and connected with the output shaft;
a seventh shaft connected with the eleventh rotation element and connected with the input shaft;
and
an eighth shaft connected with the twelfth rotation element and selectively connectable with the respective third shaft and sixth shaft.

12 more elements

A planetary gear train of an automatic transmission for a vehicle, comprising:

an input shaft receiving an engine torque;
an output shaft outputting a shifted torque;
a first planetary gear set having first, second, and third rotation elements;
a second planetary gear set having fourth, fifth, and sixth rotation elements;
a third planetary gear set having seventh, eighth, and ninth rotation elements;
and
a fourth planetary gear set having tenth, eleventh, and twelfth rotation elements, wherein
the input shaft is connected with the eleventh rotation element;
the output shaft is connected with the eighth rotation element;
the first rotation element is connected with the fourth rotation element, and selectively connectable with the input shaft or the transmission housing;
the second rotation element is connected with the sixth rotation element, the seventh rotation element, and the tenth rotation element;
the third rotation element is selectively connectable with the twelfth rotation element;
and
the eighth rotation element is selectively connectable with the twelfth rotation element.

11 more elements

Dependencies are inferred from the claim text.

Planetary gear train of automatic transmission for vehicles

Life of this patent

Planetary gear train of automatic transmission for vehicles

Life of this patent

Abstract

Claims10