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

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.

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 includes: an input shaft for receiving an engine torque; an output shaft for outputting a changed torque; and first, second, third, and fourth planetary gear sets each including three rotational elements. The gear train also includes eight shafts for selectively connecting the planetary gear sets, the input and output shafts, and a transmission housing in various configurations to achieve at least ten forward speeds and at least one reverse speed.

Abstract: A planetary gear train of an automatic transmission for a vehicle includes: an input shaft and an output shaft; 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 rotational element and the twelfth rotational element; a second shaft connected with the second rotational element and the input shaft; a third shaft interconnecting the third rotational element and the fourth rotational element; a fourth shaft interconnecting the sixth rotational element and the seventh rotational element; a fifth shaft interconnecting the ninth rotational element and the tenth rotational element; and a sixth shaft connected with the eleventh rotational element and the output shaft.

Abstract: A planetary gear train of an automatic transmission for a vehicle is disclosed. The planetary gear train provides ten forward speed stages and one reverse speed stage by combining four planetary gear sets with seven control elements. The planetary gear train includes an input shaft an output shaft, four plantary gear sets, eight shafts interconnecting rotation elements of the four planetary gear sets, four clutches, and three brakes for controlling operation of the planetary gear train. The planetary gear train is configured to have a gear ratio span greater than 10.0 while securing linearty of step ratios of shift stages.

Abstract: A planetary gear train of an automatic transmission includes an input shaft for receiving an engine torque, an output shaft outputting changed torque, 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 connected with the first rotational element, a second shaft interconnecting the second rotational element and the fourth rotational element and connected with the input shaft, a third shaft interconnecting the third rotational element and the tenth rotational element, a fourth shaft interconnecting the fifth rotational element and the eighth element, a fifth shaft connected with the sixth rotational element, and a sixth shaft connected with the seventh rotational element.

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 from 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 rotation elements. In addition, the planetary gear train includes nine shafts operably connected to at least of the rotation elements to provide ten forward speed stages and one reverse speed stage so that more efficient power delivery performance and smooth speed stage change are achieved.

Abstract: A planetary gear train disclosed herein includes an input shaft for receiving engine torque; an output shaft for outputting shifted torque; a first planetary gear set having first, second, and third rotational elements; a second planetary gear set having fourth, fifth, and sixth rotational elements; a third planetary gear set having seventh, eighth, and ninth rotational elements; a fourth planetary gear set having tenth, eleventh, and twelfth rotational elements; a first shaft interconnecting the first, fifth, ninth, and tenth rotational elements; a second shaft connected with the second rotational element and the input shaft; a third shaft connected with the third rotational element; a fourth shaft interconnecting the sixth and eighth rotational elements, and selectively connected with the second shaft; a fifth shaft connected with the seventh rotational element and, selectively connected with the second shaft; and a sixth shaft connected with the eleventh rotational element and the output shaft.

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 of an automatic transmission for a vehicle may include an input shaft receiving torque of an engine, an output shaft outputting changed 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, and a fourth planetary gear set including tenth, eleventh, and twelfth rotation elements, in which the input shaft is directly connected to the second rotational element and the sixth rotational element, the output shaft is directly connected to the third rotational element and the eleventh rotational element, the fourth rotational element is directly connected to the eighth rotational element and is selectively connected to the first rotational element, and the seventh rotational element is directly connected to the tenth rotational element.

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 mounted with the fourth planetary gear set on an external circumference of the output shaft, a first shaft directly connected with the input shaft, a second shaft, a third shaft, a fourth shaft, a fifth shaft, a sixth shaft, a seventh 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 externally gear-meshed with the eighth shaft, and transfer gears.

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: A planetary gear train of an automatic transmission for vehicle may include an input shaft receiving power of an engine, an output shaft outputting shifted power of the engine, a first planetary gear set including a first rotation element, a second rotation element, and a third rotation element, a second planetary gear set including a fourth rotation element, a fifth rotation element, and a sixth rotation element, a third planetary gear set including a seventh rotation element, an eighth rotation element, and a ninth rotation element, a fourth planetary gear set including a tenth rotation element, an eleventh rotation element, and a twelfth rotation element, and six control elements disposed at positions selectively connecting the rotation elements to each other or at positions selectively connecting the rotation elements and a transmission housing.

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: 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: 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: 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: 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, an output shaft disposed in parallel with the input shaft, a first connecting member, a second connecting member, a third connecting member, a fourth connecting member, a fifth connecting member, a sixth connecting member connected to the input shaft selectively, a seventh connecting member engaged with the second connecting member, an eighth connecting member directly connected with the output shaft, and transfer gears connected with the connecting members.

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.