Planetary gear train of automatic transmission for vehicle
First Claim
1. A planetary gear train of an automatic transmission for a vehicle, comprising:
- 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;
an input shaft mounted with the first, second, and third planetary gear sets at an external circumference of the input shaft;
an output shaft disposed in parallel with the input shaft and mounted with the fourth planetary gear set on an external circumference of the output shaft;
a first shaft fixedly interconnecting the first rotational element and the fourth rotational element;
a second shaft fixedly connected with the second rotational element and fixedly connected with the input shaft;
a third shaft fixedly interconnecting the third rotational element and the eighth rotational element, such that the third and eighth rotational elements always rotate at a same speed;
a fourth shaft fixedly connected with the fifth rotational element and fixedly gear-meshed with the output shaft;
a fifth shaft fixedly connected with the sixth rotational element, such that the fifth shaft always rotates at a same speed with the sixth rotational element;
a sixth shaft fixedly connected with the seventh rotational element;
a seventh shaft fixedly connected with the ninth rotational element;
an eighth shaft fixedly connected with the tenth rotational element;
a ninth shaft fixedly connected with the eleventh rotational element and fixedly connected with the output shaft;
a tenth shaft fixedly connected with the twelfth rotational element; and
transfer gears, each of which forming an external gear-mesh between a corresponding pair of shafts among the first to tenth shafts,wherein one shaft among the eighth and tenth shafts is selectively connected with a transmission housing and another shaft among the eighth and tenth shafts is gear-meshed with the third shaft.
1 Assignment
0 Petitions
Accused Products
Abstract
A planetary gear train of an automatic transmission for a vehicle may include a first planetary gear set, a second planetary gear set, a third planetary gear set, a fourth planetary gear set, an input shaft mounted with the first, second, and third planetary gear sets at an external circumference of the input shaft, an output shaft disposed in parallel with the input shaft and mounted with the fourth planetary gear set on external circumference of the output shaft, a first shaft, a second shaft directly connected with the input shaft, a third shaft, a fourth shaft gear-meshed with the output shaft, a fifth shaft, a sixth shaft, a seventh shaft, an eighth shaft, a ninth shaft directly connected with the output shaft, a tenth shaft, and transfer gears, each gear-meshed with at least one of the shafts.
9 Citations
18 Claims
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1. A planetary gear train of an automatic transmission for a vehicle, comprising:
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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; an input shaft mounted with the first, second, and third planetary gear sets at an external circumference of the input shaft; an output shaft disposed in parallel with the input shaft and mounted with the fourth planetary gear set on an external circumference of the output shaft; a first shaft fixedly interconnecting the first rotational element and the fourth rotational element; a second shaft fixedly connected with the second rotational element and fixedly connected with the input shaft; a third shaft fixedly interconnecting the third rotational element and the eighth rotational element, such that the third and eighth rotational elements always rotate at a same speed; a fourth shaft fixedly connected with the fifth rotational element and fixedly gear-meshed with the output shaft; a fifth shaft fixedly connected with the sixth rotational element, such that the fifth shaft always rotates at a same speed with the sixth rotational element; a sixth shaft fixedly connected with the seventh rotational element; a seventh shaft fixedly connected with the ninth rotational element; an eighth shaft fixedly connected with the tenth rotational element; a ninth shaft fixedly connected with the eleventh rotational element and fixedly connected with the output shaft; a tenth shaft fixedly connected with the twelfth rotational element; and transfer gears, each of which forming an external gear-mesh between a corresponding pair of shafts among the first to tenth shafts, wherein one shaft among the eighth and tenth shafts is selectively connected with a transmission housing and another shaft among the eighth and tenth shafts is gear-meshed with the third shaft. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A planetary gear train of an automatic transmission for a vehicle, comprising:
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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; an input shaft mounted with the first, second, and third planetary gear sets at an external circumference of the input shaft; and an output shaft disposed in parallel with the input shaft and mounted with the fourth planetary gear set on an external circumference of the output shaft, wherein the first rotational element is directly connected with the fourth rotational element, the second rotational element is directly connected with the input shaft, the third rotational element is directly connected with the eighth rotational element and gear-meshed with one rotational element among the tenth and twelfth rotational elements, the fifth rotational element is gear-meshed with the output shaft through a first transfer gear, the sixth rotational element is selectively connected with a transmission housing, the ninth rotational element is selectively connected with the transmission housing, the eleventh rotational element is directly connected with the output shaft, and a remaining rotational element, among the tenth and twelfth rotational elements, excluding the one rotational element gear-meshed with the third rotational element, is selectively connected with the transmission housing. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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Specification