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 torque of the engine, a first planetary gear set, a second planetary gear set, a third planetary gear set, a fourth planetary gear set, a first shaft, a second shaft, a third shaft, a fourth shaft directly connected to the input shaft, a fifth shaft, a sixth shaft selectively connectable to each of the first, second, and fourth shafts, a seventh shaft, and an eighth shaft selectively connectable to the seventh 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 torque, a first planetary gear set, a second planetary gear set, a third planetary gear set, a fourth planetary gear set, a first shaft, a second shaft, a third shaft, a fourth shaft, a fifth shaft selectively connectable to the second shaft, a sixth shaft connected to the input shaft, and selectively connectable to each of the third shaft and the fourth shaft, a seventh shaft connected to the output shaft, and an eighth shaft.

Abstract: A planetary gear train of an automatic transmission may include input shaft, output, first planetary gear set having first to third rotational elements, second planetary gear set having fourth to sixth rotational elements, third planetary gear set having seventh to ninth rotational elements, fourth planetary gear set having tenth to twelfth rotational elements, first shaft interconnecting the first and fourth rotational elements, and may be selectively connected with the input shaft or transmission housing, second shaft interconnecting the second rotational element, the sixth rotational element, the seventh rotational element, and the tenth rotational element connect, third shaft connected with the third rotational element, fourth shaft connected with the fifth rotational element, fifth shaft connected with the ninth rotational element, sixth shaft connected with the eighth rotational element and connected with the output shaft, a seventh shaft connected with the eleventh rotational element and connected with

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, three planetary gear sets respectively having three rotational elements, and six control elements for selectively interconnecting the rotational elements.

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 of the engine, a first planetary gear set, a second planetary gear set, a third planetary gear set, a fourth planetary gear set, six control elements for selectively interconnecting rotation elements of the planetary gear sets and a transmission housing, a first connecting member selectively connected to the transmission housing, a second connecting member selectively connected to the transmission housing, a third connecting member directly connected to the input shaft, a fourth connecting member selectively connected to the transmission housing, a fifth connecting member selectively connected to the input shaft, and selectively connected to the transmission housing, a sixth connecting member directly connected to the output shaft, and a seventh connecting member selectively connected to the input shaft.

Abstract: A planetary gear train of automatic transmission may comprise an input shaft, an output shaft, first, second, third, and fourth planetary gear sets having first to twelfth rotating element, and six control elements disposed between one of the rotating elements and another or the input shaft, between one of the rotating elements and the output shaft, or between one of the rotating elements and a transmission housing, wherein the input shaft is directly connected with the third rotating element, the output shaft is connected with the eleventh rotating element continuously, the second rotating element is directly connected with the eleventh rotating element, the third rotating element is directly connected with the fourth rotating element, the fifth rotating element is directly connected with the ninth rotating element, the sixth rotating element is directly connected with the tenth rotating element, and the seventh rotating element is selectively connected with the transmission housing.

Abstract: The present disclosure provides a planetary gear train of an automatic transmission for a vehicle having advantages of improving power transfer performance and fuel efficiency by implementing ten forward speeds and one reverse speed. The planetary gear train includes: first, second, third, and fourth planetary gear sets; an input shaft; an output shaft; eight shafts connected to the respective rotation elements of the first, second, third, and fourth planetary gear sets; four clutches and two brakes which are control elements; and a transmission housing H. With this arrangement, rotation power from an engine which is input from the input shaft is shifted by a mutual complementing operation between the first, second, third, and fourth planetary gear sets, and is then output through 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 of the engine, a first planetary gear set, a second planetary gear set, a third planetary gear set, a fourth planetary gear set, a first rotation shaft selectively connectable to a transmission housing, a second rotation shaft selectively connectable to the first rotation shaft, and directly connected to the input shaft, a third rotation shaft selectively connectable to the transmission housing, a fourth rotation shaft, a fifth rotation shaft selectively connectable to at least one of the second rotation shaft and the third rotation shaft, a sixth rotation shaft directly connected to the output shaft, and a seventh rotation shaft selectively connectable to the transmission housing.

Abstract: A power transmission system of a hybrid electric vehicle may include an input shaft, an output shaft, a first planetary gear set having three rotation elements, a second planetary gear set having three rotation elements, a third planetary gear set, a first rotational shaft, a second rotational shaft, a third rotational shaft, a fourth rotational shaft, a fifth rotational shaft, a sixth rotational shaft, and a seventh rotational shaft such that the power transmission system can suppress conversion to an ENG mode by providing sufficient power performance at the time of wide open throttle (WOT) launching and maximally use power of an engine at the time of conversion to a first HEV mode and a third HEV mode.

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, three planetary gear sets respectively having four rotation elements, and six control elements for selectively interconnecting the rotation elements.

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 torque of the engine, a first planetary gear set, a second planetary gear set, a third planetary gear set, a fourth planetary gear set, a first shaft, a second shaft directly connected to the input shaft, a third shaft, a fourth shaft, a fifth shaft selectively connectable to the third shaft, a sixth shaft selectively connectable to the third shaft, a seventh shaft selectively connectable to the fourth shaft, and an eighth shaft selectively connectable to the third 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 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 friction elements selectively connecting the rotation elements, or selectively connecting at least one rotation element and a transmission housing.

Abstract: A planetary gear train of an automatic transmission for a vehicle is provided. Ten or more 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 to selectively interconnect the rotational elements and a transmission housing.

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, a second planetary gear set, a third planetary gear set, a fourth planetary gear set, a first shaft directly connected with the input shaft, a second shaft, a third shaft, a fourth shaft selectively connectable to the third shaft, a fifth shaft selectively connectable with the third shaft, a sixth shaft, a seventh shaft directly connected with a transmission housing, an eighth shaft selectively connectable with each of the fifth shaft and the sixth shaft, and a ninth shaft selectively connectable with the fifth shaft, and directly connected with 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 torque of the engine, a first planetary gear set, a second planetary gear set, a third planetary gear set, a fourth planetary gear set, a first shaft, a second shaft, a third shaft selectively connectable to the input shaft, and selectively connectable to a transmission housing, a fourth shaft selectively connectable to the input shaft, a fifth shaft directly connected to the output shaft, a sixth shaft, and a seventh shaft selectively connectable to the input shaft.

Abstract: A planetary gear set 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 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, six control elements for selectively interconnecting the rotational elements, a first connecting member, a second connecting member, a third connecting member, a fourth connecting member, a fifth connecting member, a sixth connecting member, and a seventh connecting member.

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, a first planetary gear set, a second planetary gear set, a third planetary gear set, a fourth planetary gear set, six control elements, a first shaft directly connected with the input shaft, a second shaft selectively connectable with a transmission housing, a third shaft, a fourth shaft, a fifth shaft directly connected with the transmission housing, a sixth shaft selectively connectable with the second shaft, and directly connected with the output shaft, a seventh shaft selectively connectable with the fourth shaft, an eighth shaft selectively connectable with the third shaft and the fourth shaft, and a ninth shaft selectively connectable with the seventh shaft.

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: 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 nine forward speed stages with a minimum number of constituent elements being used, and improves driving stability of a vehicle by utilizing a low rotation speed of an engine.

Abstract: Eleven 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.