Abstract: A planetary gear train of an automatic transmission for a vehicle having an input shaft for receiving torque of an engine; an output shaft for outputting torque; a first planetary gear set including first, second, and third rotation elements; a second planetary gear set including fourth, fifth, and sixth rotation elements; a third planetary gear set including seventh, eighth, and ninth rotation elements; and a fourth planetary gear set including tenth, eleventh, and twelfth rotation elements, improves power delivery performance and fuel economy by achieving at least ten forward speed stages.

Abstract: Nine or more forward speeds and at least one 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 rotation elements, and six control elements for selectively interconnecting the rotation elements and a transmission housing.

Abstract: A planetary gear train of an automatic transmission for a vehicle may include: an input shaft receiving torque of an engine; an output shaft outputting changed torque; a first planetary gear set including first, second, and third rotation elements; a second planetary gear set including fourth, fifth, and sixth rotation elements; a third planetary gear set including seventh, eighth, and ninth rotation elements; a fourth planetary gear set including tenth, eleventh, and twelfth rotation elements. The planetary gear train improves power delivery performance and fuel economy by achieving at least ten forward speed stages and one reverse speed stage, and widens gear ratio span and secures linearity of step ratios.

Abstract: A planetary gear set of an automatic transmission for a vehicle may include input and output shafts for receiving and outputting torques, first to fourth planetary gear sets respectively forming first to third, fourth to sixth, seventh to ninth, and tenth to twelfth rotational elements, and six control elements each of which selectively interconnects a corresponding pair among the input and output shafts, the rotational elements, and a transmission housing, where the input and output shafts are fixedly connected to the first and eleventh rotational elements respectively, respective pairs of the first and sixth rotational elements, the second and ninth rotational elements, the third and tenth rotational elements, the fifth and eleventh rotational elements are fixedly interconnected, and the seventh rotational element is selectively connected to the transmission housing.

Abstract: A planetary gear train of an automatic transmission for a vehicle may include: an input shaft receiving torque of an engine; an output shaft outputting changed torque; a first planetary gear set including first, second, and third rotation elements; a second planetary gear set including fourth, fifth, and sixth rotation elements; a third planetary gear set including seventh, eighth, and ninth rotation elements; a fourth planetary gear set including tenth, eleventh, and twelfth rotation elements. The planetary gear train improves power delivery performance and fuel economy by achieving at least ten forward speed stages and one reverse speed stage, and widens gear ratio span and secures linearity of step ratios.

Abstract: A planetary gear train of an automatic transmission for a vehicle having an input shaft for receiving torque of an engine; an output shaft for outputting torque; a first planetary gear set including first, second, and third rotation elements; a second planetary gear set including fourth, fifth, and sixth rotation elements; a third planetary gear set including seventh, eighth, and ninth rotation elements; and a fourth planetary gear set including tenth, eleventh, and twelfth rotation elements, improves power delivery performance and fuel economy by achieving at least ten forward speed stages.

Abstract: A planetary gear train of an automatic transmission for a vehicle may include an input shaft configured for receiving an engine torque, an output shaft configured for outputting a shifted torque, a first planetary gear set including first, second, and third rotation elements, a second planetary gear set including fourth, fifth, and sixth rotation elements, a third planetary gear set including seventh, eighth, and ninth rotation elements, a fourth planetary gear set including tenth, eleventh, and twelfth rotation element, and six control elements for selectively interconnecting the rotation elements and a transmission housing.

Abstract: A planetary gear train of an automatic transmission for a vehicle may include an input shaft, an output shaft, a first planetary gear set including first, second, and third rotation elements, a second planetary gear set including fourth, fifth, and sixth rotation elements, a third planetary gear set including seventh, eighth, and ninth rotation element, and a fourth planetary gear set including tenth, eleventh, and twelfth rotation elements, in which the input shaft is directly connected to the third rotation element, the second rotation element is directly connected to the eleventh rotation element, the output shaft is directly connected to the second rotation element, the third rotation element is directly connected to the fourth rotation element, the sixth rotation element is directly connected to the eighth rotation element, the ninth rotation element is directly connected to the tenth rotation element, and the fifth rotation element is selectively connected to a transmission housing.

Abstract: A an automatic transmission includes: a first planetary gear set including a first, second, and third rotation elements; a second planetary gear set including a fourth, fifth, and sixth rotation elements; a third planetary gear set including a seventh, eighth, and ninth rotation elements; a fourth planetary gear set including a tenth, eleventh and twelfth rotation elements; a first shaft interconnecting the first and fourth rotational elements, and selectively connected to the transmission housing; a second shaft interconnecting the second and seven rotational elements, and connected with an input shaft; a third shaft connected to the third rotational element, and selectively connected to the transmission housing; a fourth shaft connected to the fifth rotational element; a fifth shaft interconnecting the sixth and eleventh rotational elements, and selectively connected to the transmission housing; and a sixth shaft interconnecting the eighth and twelfth rotational element, and connected to an output shaft.

Abstract: A planetary gear train of an automatic transmission for a vehicle including 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 mounted with the fourth planetary gear set on an external circumference of the output shaft, a first shaft, a second shaft, a third shaft, a fourth shaft, a fifth shaft, a sixth shaft, a seventh shaft gear-meshed with one shaft among the fifth and sixth shafts, an eighth shaft directly connected with the output shaft, a ninth shaft gear-meshed with a remaining shaft among the fifth and sixth shafts that is not gear-meshed with the seventh shaft, and transfer gears.

Abstract: A planetary gear train of an automatic transmission for a vehicle includes an input shaft, an output shaft, a first planetary gear set including first, second and third rotation elements, a second planetary gear set including fourth, fifth and sixth rotation elements, a third planetary gear set including seventh, eighth and ninth rotation elements, a fourth planetary gear set including tenth, eleventh and twelfth rotational elements, a first shaft, a second shaft, a third shaft, a fourth shaft, a fifth shaft connecting the sixth rotational element to the seventh rotational element and selectively connected to the input shaft or the third shaft, a sixth shaft connecting the eighth rotational element to the twelfth rotational element, a seventh shaft connected to the ninth rotational element, and an eighth shaft connected to the eleventh rotational element, selectively connected to the fourth shaft and directly connected to the output shaft.

Abstract: A planetary gear train of an automatic transmission for a vehicle may include: an input shaft receiving torque of an engine; an output shaft outputting changed torque; a first planetary gear set including first, second, and third rotation elements; a second planetary gear set including fourth, fifth, and sixth rotation elements; a third planetary gear set including seventh, eighth, and ninth rotation elements; a fourth planetary gear set including tenth, eleventh, and twelfth rotation elements. The planetary gear train improves power delivery performance and fuel economy by achieving at least ten forward speed stages and one reverse speed stage, and widens gear ratio span and secures linearity of step ratios.

Abstract: A planetary gear train of an automatic transmission for a vehicle may include: an input shaft receiving torque of an engine; an output shaft outputting changed torque; a first planetary gear set including first, second, and third rotation elements; a second planetary gear set including fourth, fifth, and sixth rotation elements; a third planetary gear set including seventh, eighth, and ninth rotation elements; a fourth planetary gear set including tenth, eleventh, and twelfth rotation elements. The planetary gear train improves power delivery performance and fuel economy by achieving at least ten forward speed stages and one reverse speed stage, and widens gear ratio span and secures linearity of step ratios.

Abstract: The present disclosure provides a planetary gear train of an automatic transmission for a vehicle. The planetary gear train may include: an input shaft receiving torque of an engine; an output shaft outputting changed torque; a first planetary gear set including first, second, and third rotation elements; a second planetary gear set including fourth, fifth, and sixth rotation elements; a third planetary gear set including seventh, eighth, and ninth rotation elements; a fourth planetary gear set including tenth, eleventh, and twelfth rotation elements.

Abstract: The present disclosure provides a planetary gear train of an automatic transmission for a vehicle. The planetary gear train may include: an input shaft receiving torque of an engine; an output shaft outputting changed torque; a first planetary gear set including first, second, and third rotation elements; a second planetary gear set including fourth, fifth, and sixth rotation elements; a third planetary gear set including seventh, eighth, and ninth rotation elements; a fourth planetary gear set including tenth, eleventh, and twelfth rotation elements.

Abstract: The present disclosure provides a planetary gear train of an automatic transmission for a vehicle. The planetary gear train may include: an input shaft receiving torque of an engine; an output shaft outputting changed torque; a first planetary gear set including first, second, and third rotation elements; a second planetary gear set including fourth, fifth, and sixth rotation elements; a third planetary gear set including seventh, eighth, and ninth rotation elements; a fourth planetary gear set including tenth, eleventh, and twelfth rotation elements.

Abstract: The present disclosure provides a planetary gear train of an automatic transmission for a vehicle. The planetary gear train may include: an input shaft receiving torque of an engine; an output shaft outputting changed torque; a first planetary gear set including first, second, and third rotation elements; a second planetary gear set including fourth, fifth, and sixth rotation elements; a third planetary gear set including seventh, eighth, and ninth rotation elements; a fourth planetary gear set including tenth, eleventh, and twelfth rotation elements. The planetary gear train improves power delivery performance and fuel economy by achieving at least eleven forward speed stages and widening speed ratio (or gear ratio) with a reduced number of constituent elements being used, and secures linearity of step ratios.

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, an input shaft, an output shaft disposed in parallel with the input shaft, a first shaft selectively acting as a fixed element, a second shaft directly connected with the input shaft, a third shaft, a fourth shaft selectively connectable with the second shaft, a fifth shaft selectively engaged with the output shaft, a sixth shaft selectively engaged with the output shaft, and transfer gears, each gear-meshed with one of the shafts.

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, an output shaft mounted with the fourth planetary gear set, a first shaft, a second shaft directly connected with the input shaft, a third shaft, a fourth shaft, a fifth shaft, a sixth shaft selectively connectable with the fourth shaft, a seventh shaft selectively connectable with the input shaft, an eighth shaft gear-meshed with one shaft among the fourth and seventh shafts, a ninth shaft directly connected with the output shaft, a tenth shaft gear-meshed with a remaining shaft among the fourth and seventh shafts that is not gear-meshed with the eighth shaft, and transfer gears.

Abstract: A planetary gear train of an automatic transmission for a vehicle may include a first planetary gear set including, a second planetary gear set, a third planetary gear set, a fourth planetary gear set, an 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 selectively acting as a fixed element, a second shaft directly connected with the input shaft, a third shaft, a fourth shaft selectively connectable with the second shaft, a fifth shaft, a sixth shaft engaged with the output shaft selectively, a seventh shaft selectively acting as a fixed element, an eighth shaft directly connected with the output shaft, a ninth shaft engaged with the fifth shaft, and two transfer gears, each of which is gear-meshed with one of the shafts.