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 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 transmission includes: a first input shaft selectively receiving power from an engine; a second input shaft receiving power from the engine; an output shaft disposed in parallel with the first input shaft; first and second countershafts, and first and second shift units; and a one-way clutch disposed in a power transmission line from the engine to the output shaft and through the second shift unit, transmitting power from the engine only to the output shaft. In particular, the first and second countershafts transmit power to the output shaft, the first shift unit carries out a series of desired gear shifts, and the second shift unit performs duplicate gear shifts one of which gear ratio is the same as one of gear ratios of the series of gear shifts made by the first shift unit.

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 transmission for a vehicle may include a first input shaft continuously receiving torque from a power source and having a first input transfer gear thereon, a second input shaft selectively receiving torque from the power source through a clutch and having a second input transfer gear thereon, a coupling member allowing or restricting rotation of the first input transfer gear relative to the first input shaft, a first countershaft and a second countershaft each having an output transfer gear to be engaged with the first input transfer gear and the second input transfer gear, and coupling devices selectively coupling the output transfer gears to corresponding countershafts and allowing torque from the power source to be transmitted to a desired shift gear by coupling output transfer gears connected to the desired shift gear in the output transfer gears to a corresponding countershaft in advance or after synchronization in shifting.

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 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: 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 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 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: 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: A transmission for a vehicle may include a first input shaft selectively receiving power from an engine, a second input shaft continuously receiving power from the engine, a first output shaft and a second output shaft disposed in parallel to the first input shaft and the second input shaft, respectively, a first shift device configured to make a series of desired gear shift ranges between the first input shaft and the and the first output shaft and between the first input shaft and the second output shaft, and a second shift device configured to make duplicate gear shift ranges, which have a gear ratio identical to a gear ratio of one or more gear shift ranges of the series of gear shift ranges made by the first shift device, using the second input shaft.

Abstract: A power transmission apparatus for a vehicle may include a first input shaft on which at least one input gear is disposed, a second input shaft on which at least one other input gear is disposed, a first shifting output device including at least one shifting gear and a first output shaft, the at least one shifting gear being selectively synchronized with the first output shaft such that torque input from the first and second input shafts is output to a final drive gear, a second shifting output device including at least one other shifting gear and a second output shaft, the at least one other shifting gear being selectively synchronized with the second output shaft such that the torque input from the first and second input shafts is output to the final drive gear, and an idle device including an idle shaft and at least three idle gears.

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 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.