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US 9,810,293 B1Granted
Planetary gear train of an automatic transmission for a vehicle
AssigneeHyundai Motor Company
InventorsKi Tae Kim, Seong Wook Hwang, Hyun Sik Kwon, Wonmin Cho, Jae Chang Kook, Seongwook Ji
Life of this patent
Estimating the term…
Abstract
Ten forward speeds and one or more reverse speed are achieved by a planetary gear train of an automatic transmission for a vehicle including an input shaft, an output shaft, four planetary gear sets respectively having three rotational elements, and six control elements for selectively interconnecting the rotational elements and a transmission housing.
Claims10
A planetary gear train of an automatic transmission for a vehicle, the planetary gear train comprising:
- an input shaft for receiving an engine torque;
- an output shaft for outputting a shifted torque;
- a first planetary gear set having a first rotational element, a second rotational element, and a third rotational element;
- a second planetary gear set having a fourth rotational element, a fifth rotational element, and a sixth rotational element;
- a third planetary gear set having a seventh rotational element, an eighth rotational element, and a ninth rotational element;
- a fourth planetary gear set having a tenth rotational element, an eleventh rotational element, and a twelfth rotational element;
- a first shaft fixedly connected with the first rotational element;
- a second shaft fixedly connected with the second rotational element, the fifth rotational element, the eleventh rotational element, and the input shaft, such that the second, fifth, and eleventh rotational elements always rotate at a speed of the input shaft;
- a third shaft fixedly connected with the third rotational element;
- a fourth shaft fixedly connected with the fourth rotational element;
- a fifth shaft fixedly connected with the sixth rotational element and a transmission housing, such that the sixth rotational element is always stationary;
- a sixth shaft fixedly connected with the seventh rotational element and selectively connected with the first shaft and the third shaft, respectively;
- a seventh shaft fixedly connected with the eighth rotational element the twelfth rotational element, and the output shaft, such that the eighth and twelfth rotational elements always rotate at a speed of the output shaft;
- an eighth shaft fixedly connected with the ninth rotational element, and selectively connected with the first shaft and the fourth shaft, respectively;
- and
- a ninth shaft fixedly connected with the tenth rotational element and selectively connected with the third shaft.
13 more elements
A planetary gear train of an automatic transmission for a vehicle, the planetary gear train comprising:
- an input shaft for receiving an engine torque;
- an output shaft for outputting a shifted torque;
- a first planetary gear set having a first rotational element, a second rotational element, and a third rotational element;
- a second planetary gear set having a fourth rotational element, a fifth rotational element, and a sixth rotational element;
- a third planetary gear set having a seventh rotational element, an eighth rotational element, and a ninth rotational element;
- and
- a fourth planetary gear set having a tenth rotational element, an eleventh rotational element, and a twelfth rotational element,
- wherein:
- the input shaft is fixedly connected with the second rotational element,
- the output shaft is fixedly connected with the twelfth rotational element,
- the second rotational element is fixedly connected with the fifth rotational element and the eleventh rotational element, such that the second, fifth, and eleventh rotational elements always rotate at a same speed,
- the eighth rotational element is fixedly connected with the twelfth rotational element, such that the eighth and twelfth rotational elements always rotate at a same speed,
- the first rotational element is selectively connected with the seventh rotational element and the ninth rotational element, respectively,
- the third rotational element is selectively connected with the seventh rotational element and the tenth rotational element, respectively,
- the fourth rotational element is selectively connected with the ninth rotational element, and
- the sixth rotational element is fixedly connected with a transmission housing, such that the sixth rotational element is always stationary.
13 more elements
Dependencies are inferred from the claim text.