Abstract: A multi-stage transmission for vehicle includes an input shaft, an output shafts, first to fourth planetary gear devices each having three rotary elements and transmitting rotary forces between the input and output shafts, and at least six shifting elements connected to the rotary elements of the planetary gear devices. Of the first planetary gear device, the first rotary element is permanently connected to the input shaft and the second rotary element of the third planetary gear device, the second rotary element is installed to be fixable by any one of the shifting elements and variably connected to the first rotary element and third rotary element of the second planetary gear device, and the third rotary element is permanently connected to the second rotary element of the second planetary gear device.

Abstract: A multi-stage transmission for a vehicle includes an input shaft, an output shaft, first to fourth planetary gear devices disposed between the input shaft and the output shaft to transmit rotary forces and each of them having three rotary elements, and at least six shifting elements connected to the rotary elements of the planetary gear devices. Of the first planetary gear device, the first rotary element is permanently connected to the input shaft and a second rotary element of the third planetary gear device, a second rotary element is installed to be fixable by any one of the shifting elements and variably connected to a first rotary element of the second planetary gear device, and a third rotary element of the first planetary gear device is permanently connected to a second rotary element and variably connected to a first rotary element of the fourth planetary gear device.

Abstract: A transmission for a vehicle may include a first planetary gear set, a second planetary gear set, a third, planetary gear set, and a fourth planetary gear set each including three rotary elements, and a plurality of friction members, wherein the friction members are connected to at least one of the rotary elements of the planetary gear sets and control rotation of the rotary elements.

Abstract: A multi-stage transmission for a vehicle may include an input shaft; an output shaft; first to fourth planetary gear devices transmitting rotary force between the input and output shafts, each of them having three rotary elements, and at least six shifting elements connected to the rotary elements of the planetary gear devices; wherein a first rotary element of the first planetary gear device is variably connected to a first rotary element and a third rotary element of the second planetary gear device, a second rotary element is continuously connected to the input shaft and variably connected to the first rotary element of the second planetary gear device, and a third rotary element is installed to be fixable by any one of the shifting elements and continuously connected to a third rotary element of the third planetary gear device.

Abstract: A multi-stage transmission for a vehicle includes an input shaft, an output shaft, first to fourth planetary gear devices each having three rotary elements and transmitting rotary forces between the input and output shafts, and at least six shifting elements connected to the rotary elements of the planetary gear devices. Of the first planetary gear device, the first rotary element is installed to be fixable by any one of the shifting elements and permanently connected to the second rotary element of the third planetary gear device and the third rotary element of the fourth planetary gear device, the second rotary element is variably connected to the third rotary element of the second planetary gear device and the third rotary element of the third planetary gear device, and the third rotary element is variably connected to the first and second rotary elements of the second planetary gear device.

Abstract: A multi-stage transmission for a vehicle may include an input shaft, an output shaft, a first to fourth planetary gear devices disposed between the input shaft and the output shaft to transmit rotary force, each of the first to fourth planetary gear devices having three rotary elements, and at least six shifting elements connected to the rotary elements of the planetary gear devices, wherein a first rotary element of the first planetary gear device is continuously connected to the input shaft, a second rotary element of the first planetary gear device is installed to be fixable by one shifting element of the at least six shifting elements, and a third rotary element of the first planetary gear device is continuously connected to a second rotary element of the second planetary gear device.

Abstract: A multi-stage transmission for vehicle may include an input shaft; and an output shafts; first to fourth planetary gear devices transmitting rotary force between the input and output shafts, each of them having three rotary elements; and at least six shifting elements connected to the rotary elements of the planetary gear devices; wherein first rotary element of the first planetary gear device is permanently connected to the input shaft and second rotary element of the third planetary gear device, second rotary element is installed to be fixable by any one of the shifting elements and variably connected to first rotary element of the third planetary gear device and first rotary element of the fourth planetary gear device, and third rotary element is variably connected to first rotary element of the second planetary gear device and permanently connected to second rotary element of the second planetary gear device.

Abstract: A multi-stage transmission for vehicle may an input shaft, an output shafts, first to fourth planetary gear devices transmitting rotary force between the input and output shafts, each of them having three rotary elements, and at least six shifting elements connected to the rotary elements of the planetary gear devices, wherein first rotary element of the first planetary gear device is permanently connected to the input shaft, second rotary element is installed to be fixable by any one of the shifting elements, and third rotary element is permanently connected to second rotary element of the second planetary gear device.

Abstract: A multi-stage transmission for a vehicle may include an input shaft, an output shaft, first to fourth planetary gear devices disposed between the input shaft and the output shaft to transmit rotary force, each of them having three rotary elements, and at least six shifting elements connected to the rotary elements of the planetary gear devices, wherein a first rotary element of the first planetary gear device is continuously connected to the input shaft and variably connected to a second rotary element of the first planetary gear device, the second rotary element is installed to be fixable by one shifting element of the at least six shifting elements, and a third rotary element of the first planetary gear device is continuously connected to a second rotary element of the second planetary gear device and variably connected to a third rotary element of the third planetary gear device.

Abstract: A transmission for a vehicle may include a first planetary gear set, a second planetary gear set, a third, planetary gear set, and a fourth planetary gear set each including three rotary elements, and a plurality of friction members, in which the friction members are connected to at least one or more of the rotary elements of the planetary gear sets and control rotation of the rotary elements.

Abstract: A multi-stage transmission for a vehicle may include an input shaft; an output shaft; first to fourth planetary gear devices transmitting rotary force between the input and output shafts, each of them having three rotary elements; and at least six shifting elements connected to the rotary elements of the planetary gear devices; wherein first rotary element of the first planetary gear device is installed to be fixable by any one of the shifting elements and variably connected to second rotary element of the second planetary gear device, second rotary element is continuously connected to the input shaft and variably connected to third rotary element of the second planetary gear device, and third rotary element is variably connected to the second rotary element of the second planetary gear device and continuously connected to first rotary element of the third planetary gear device.

Abstract: A transmission for a vehicle may include a first planetary gear set, a second planetary gear set, a third, planetary gear set, and a fourth planetary gear set each including three rotary elements, and a plurality of friction members, in which the friction members are connected to at least one or more of the rotary elements of the planetary gear sets and control rotation of the rotary elements.

Abstract: A multi-stage transmission for a vehicle may include an input shaft and an output shaft, a first planetary gear device, a second planetary gear device, a third planetary gear device, and a fourth planetary gear device provided between the input shaft and the output shaft so as to transfer a torque and each including three rotating elements, and at least six shifting elements connected to the rotating elements of the first to fourth planetary gear devices.

Abstract: A transmission for vehicles may include a first planetary gear set, a second planetary gear set, a third planetary gear set, and a fourth planetary gear set each of the first, second and third planetary gear sets including three rotary elements; and a plurality of friction members, wherein the friction members are connected to at least one of the rotary elements of the planetary gear sets and control rotation of the rotary elements.

Abstract: The present disclosure is a multi-stage transmission for a vehicle that has at least ten forward shifting stages and one reverse shifting stage. The multi-stage transmission has a relatively small number of parts and a simple configuration such that an engine may be operated at desired operation, thereby providing an improvement in the fuel efficiency of the vehicle, and the engine may be operated more quietly, thereby improving the quietness of the vehicle.

Abstract: A multi-stage transmission for a vehicle may include an input shaft and an output shaft, a first planetary gear device, a second planetary gear device, a third planetary gear device, and a fourth planetary gear device provided between the input shaft and the output shaft to transfer a torque and each including three rotating elements, and at least six shifting elements connected to the rotating elements of the first to fourth planetary gear devices.

Abstract: A multi stage transmission for the vehicle may include an input shaft and an output shaft, a first planetary gear device, a second planetary gear device, a third planetary gear device, and a fourth planetary gear device configured to transfer a rotating force between the input shaft and the output shaft and each including three rotating elements, and at least six shift elements connected to the rotating elements of the planetary gear devices.

Abstract: The present disclosure relates to a multi-stage transmission for a vehicle that includes four planetary gear devices and six shifting elements, and each of the planetary gear devices include three rotary elements selectively connected to the six shifting elements, preferably so that the multi-stage transmission provides at least ten forward shifting stages and at least one reverse shifting stage with a relatively small number of parts and a simple configuration. In this configuration, an engine may be operated at desired operation points, to improve the fuel efficiency of the vehicle and improve the quietness of the vehicle.

Abstract: A multi-stage transmission for a vehicle may include an input shaft, an output shaft, first to fourth planetary gear devices disposed between the input shaft and the output shaft to transmit rotary force, each of the first to fourth planetary gear devices having three rotary elements, and at least six shifting elements connected to the rotary elements of the planetary gear devices.

Abstract: A multi-stages automatic transmission for a vehicle includes a first, second, third and fourth planetary gear sets, each including a first, second and third rotation elements, respectively, and friction members including first, second, third and fourth clutches and first and second brakes.