Abstract: Disclosed herein is a planetary gear train that provides at least nine forward speeds and at least one reverse speed by a combination of four planetary gear sets, two transfer gears, and six control elements, thereby providing improvement of power delivery performance and fuel consumption and improving ease of installation by shortening the length of the planetary gear train for an automatic transmission.

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 an output torque, 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, and a fourth planetary gear set including tenth, eleventh, and twelfth rotational elements.

Abstract: A planetary gear train of an automatic transmission for a vehicle is disclosed. The planetary gear train may include: 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; an input shaft, the first, second, and third planetary gear sets being disposed at a radial outer of the input shaft; and an output shaft disposed in parallel with the input shaft, the fourth planetary gear set being disposed at a radial outer of the outer shaft.

Abstract: A planetary gear train of an automatic transmission includes: input and output shafts; first to fifth planetary gear sets respectively having first to third, fourth to sixth, seventh to ninth, tenth to twelfth, and thirteenth to fifteenth rotational elements; a first shaft connected with the first rotational element and the input shaft; a second shaft connected with the fourteenth rotational element and the output shaft; a third shaft connected with the sixth and thirteenth rotational elements; a fourth shaft connected with the eighth, eleventh, and fifteenth rotational elements; a fifth shaft connected with the fifth rotational element; a sixth shaft connected with the twelfth rotational element; a seventh shaft connected with the second and fourth rotational elements; an eighth shaft connected with the third and seventh rotational elements; and a ninth shaft connected with the ninth and tenth rotational elements.

Abstract: A planetary gear train of an automatic transmission for vehicles provides forward ten speed stages and one reverse speed stage. The planetary gear train includes: an input shaft; an output shaft; five planetary gear sets each having three rotation elements; three clutches; three brakes; and nine shafts. Some of the nine shafts may directly connect or selectively connect a plurality of rotation elements among the rotation elements via the clutches, and some of the nine shafts selectively connect selected rotation elements to a transmission housing H via the brakes. In particular, the selected rotation elements are not connected to another rotation element of the five planetary gear sets.

Abstract: A planetary gear train of an automatic transmission for vehicles is disclosed to improve power delivery performance and fuel efficiency by apply six engaging elements to reduce a drag loss of a clutch and a brake while achieving ten forward speed stages and one reverse speed stage. The planetary gear train includes: first, second, third, fourth, and fifth planetary gear sets disposed on the same axis; an input shaft; an output shaft; nine shafts connecting each rotational element of the first, second, third, fourth, and fifth planetary gear sets; three clutches and three brakes as the six engaging elements; and a transmission housing. Some of the nine shafts fixedly connect rotation elements selected from the rotation elements of the five planetary gear sets to each other while some of the nine shafts selectively connect a rotation element with the transmission housing via the brakes.

Abstract: A power transmitting apparatus of a hybrid electric vehicle includes an input device including four input shafts disposed with several input gears, torque converting device including a planetary gear set having rotation elements connected with the input shafts, and a shifting output device for shifting torques received from the input shafts and outputting the shifted torque.

Abstract: A planetary gear train may include first to fifth planetary gear sets having first to third, fourth to sixth, seventh to ninth, and tenth to twelfth elements, a first shaft fixedly connected to the first and eleventh elements and input shaft, a second shaft fixedly connected to the second element and one element of the fifth planetary gear set, selectively connectable to the input shaft and a transmission housing, a third shaft fixedly connected to the eighth element and output shaft, a fourth shaft fixedly connected to the third and fifth elements, a fifth shaft fixedly connected to the sixth, seventh, tenth, and another element of the fifth planetary gear set not connected to the second shaft, a sixth shaft fixedly connected to the twelfth element, a seventh shaft fixedly connected to a remaining element of the fifth planetary gear set not connected to the first and second shafts.

Abstract: A planetary gear train of an automatic transmission may include first to fourth planetary gear sets having first to third, fourth to sixth, seventh to ninth, and eighth to twelfth elements, the first to third gear sets being mounted on an input shaft, the fourth gear set being mounted on an output shaft, a first shaft connected to first and sixth elements, a second shaft connected to second and ninth elements and input shaft, a fourth shaft connected to fourth and seventh elements, third, fifth, and sixth shafts connected to third, fifth, and eighth elements respectively, a seventh shaft connected to tenth element, and externally gear-meshed with fifth shaft, an eighth shaft connected to eleventh element and output shaft, and externally gear-meshed with sixth shaft selectively, a ninth shaft connected to the twelfth element, and two transfer gears each forming external gear-engagement between a corresponding pair of shafts.

Abstract: A planetary gear train may include first to fourth planetary gear sets having first to third, fourth to sixth, seventh to ninth, and eighth to twelfth elements, the first to third gear sets being mounted on an input shaft, the fourth gear set being mounted on an output shaft, first shaft connected to the first and fourth elements, second shaft connected to the second and ninth elements, third shaft connected to the third element and the input shaft, fourth, fifth, sixth, and seventh shaft connected to the fifth, sixth, seventh, and eighth elements respectively, eighth shaft connected to the tenth element and externally gear-meshed with the fifth shaft, ninth shaft connected to the eleventh element and the output shaft, tenth shaft connected to the twelfth element, and externally gear-meshed with the seventh shaft, and two transfer gears each forming external gear-engagement between a corresponding pair of shafts.

Abstract: A planetary gear train of an automatic transmission for a vehicle may include an input shaft for receiving an engine torque, an output shaft for outputting a shifted torque of the engine, 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, and six control elements for selectively interconnecting the rotation elements and a transmission housing.

Abstract: A planetary gear train includes: first to fourth planetary gear sets respectively having first to third, fourth to sixth, seventh to ninth, and tenth to twelfth rotational elements; an input shaft axial to the first to third planetary gear sets; and an output shaft axial to the fourth planetary gear set. In particular, the first and fourth rotational elements, the second rotational element and the input shaft, the fifth and eighth rotational elements, and the eleventh rotational element and the output shaft are fixedly interconnected by first, second, fourth, and ninth shafts respectively. Moreover, the third, sixth, seventh, and ninth rotational elements are fixedly connected with third, fifth, sixth, and seventh shafts respectively, an eighth shaft is fixedly connected with the tenth rotational element and externally gear-meshed with the sixth shaft, and a tenth shaft fixedly connected with the twelfth rotational element and externally gear-meshed with the fourth shaft.

Abstract: A planetary gear train of an automatic transmission includes: first to fourth planetary gear sets respectively having first to third, fourth to sixth, seventh to ninth, and tenth to twelfth rotational elements; first and second external gear sets respectively having thirteenth and fourteenth rotational elements and fifteenth and sixteenth rotational elements; an input shaft coaxially arranged with the first, second, and third planetary gear sets and the thirteenth and fifteenth rotational elements; and an output shaft arranged in parallel with the input shaft and coaxial with the fourth planetary gear set and the fourteenth and sixteenth rotational elements. In particular, the second and eleventh rotational elements are fixedly connected with the input shaft and the output shaft respectively, and the seventh and fifth rotational elements are externally gear-meshed with the tenth and twelfth rotational elements through the first and second external gear sets respectively.

Abstract: A planetary gear train of an automatic transmission for a vehicle is disclosed. The planetary gear train may include: an input shaft receiving torque of an engine; an output shaft 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; a fourth planetary gear set including tenth, eleventh, and twelfth rotation elements; a fifth planetary gear set including thirteenth, fourteenth, and fifteenth rotational elements. The planetary gear train improves power delivery performance and fuel economy by achieving ten forward speed stages and one reverse speed stage.

Abstract: A planetary gear train of an automatic transmission for a vehicle may include: first to fourth planetary gear sets respectively having first to third rotational elements, fourth to sixth rotational elements, seventh to ninth rotational elements, tenth to twelfth rotational elements; an input shaft mounted with the first, second, and third planetary gear sets; an output shaft mounted with the fourth planetary gear set; first to ninth shafts; three clutches and two brakes as control elements; and two transfer gears. In particular, the first shaft fixedly connects the first and sixth rotational elements, the fourth shaft fixedly connects the fourth and ninth rotational elements and is selectively connected with the second shaft, the seventh shaft fixedly connects the tenth rotational element and externally gear-meshes with the fifth shaft, and the eighth shaft fixedly connects the eleventh rotational element and selectively externally gear-meshes with the sixth shaft.

Abstract: A planetary gear train of an automatic transmission for a vehicle is disclosed. The planetary gear train may include: 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; an input shaft, the first, second, and third planetary gear sets being disposed at a radial outer of the input shaft; and an output shaft disposed in parallel with the input shaft, the fourth planetary gear set being disposed at a radial outer of the outer shaft.

Abstract: A planetary gear train of an automatic transmission 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; a first shaft connecting the first rotation element and the fourth rotation element; a second shaft connected with the second rotation element and connected with the input shaft; a third shaft connecting the third rotation element and the fifth rotation element; a fourth shaft connecting the sixth rotation element and the ninth rotation element; a fifth shaft connecting the eighth rotation element and the twelfth rotation element; and a sixth shaft connected with the tenth rotation element.

Abstract: A planetary gear train of an automatic transmission for a vehicle provides at least eight forward speeds and one reverse speed by combination of: first to fourth planetary gear sets respectively having first to third rotational elements, fourth to sixth rotational elements, seventh to ninth rotational elements, or tenth to twelfth rotational elements; two transfer gears and five control elements selectively connecting one shaft to another shaft selected from first to tenth shafts or to a transmission housing. In particular, the input shaft is mounted with the first, second, and third planetary gear sets at an external circumference of the input shaft; the output shaft is mounted with the fourth planetary gear set on external circumference of the output shaft, and the tenth rotational element is externally gear-meshed with one shaft selectively connected with the second rotational element, the seventh rotational element, and the ninth rotational element respectively.

Abstract: A planetary gear train of an automatic transmission provides at least eight forward speeds and one reverse speed by combination of: first to fourth planetary gear sets respectively having first to third rotational elements, fourth to sixth rotational elements, seventh to ninth rotational elements, or tenth to twelfth rotational elements; and two transfer gears and five control elements selectively connecting one shaft to another shaft selected from first to tenth shafts or to a transmission housing. In particular, the input shaft is mounted with the first, second, and third planetary gear sets, the output shaft is mounted with the fourth planetary gear set, the eleventh rotational element is externally gear-meshed with the eighth rotational element and fixedly connected with the output shaft, and two transfer gear units are respectively arranged between the fifth and tenth rotational elements and between the eighth and eleventh rotational elements.

Abstract: A vehicle transmission is provided that improves fuel efficiency through multiple speed stages and enhances silent drivability of a vehicle using an operating point in a low RPM range of an engine. The vehicle transmission combines three simple planetary gear units with a single compound planetary gear set or combines five simple planetary gear units to shift gears while changing rotational speeds and directions by a selective intermittence operation using rotation elements of the planetary gear units and a plurality of friction elements. Through such a shift operation, it is possible to form at least forward 10-speed or more and reverse 1-speed gear ratios for driving of the vehicle.