Abstract: A vehicular multi-stage transmission includes: input and output shafts; first, second, third and fourth planetary gear devices each including first, second and third rotary elements; and seven shifting elements connected to the rotary elements of the four planetary gear devices. In particular, the second rotary element of the first planetary gear device PG1 is selectively connected to a transmission case by a first shifting element while being selectively connected to the input shaft, and the secondary rotary element of the first planetary gear device is selectively connected to the third rotary element of the second planetary gear device, the first rotary element of the third planetary gear device, and the first rotary element of the fourth planetary gear device. In addition, the third rotary element of the first planetary gear device is fixedly connected to the second rotary element of the second planetary gear device.

Abstract: Disclosed is a vehicle transmission with multiple gear stages, the transmission being capable of improving fuel economy and the performance of a vehicle. The vehicle transmission includes four planetary gear sets and six friction members. A shifting operation is performed such that rotary elements of the planetary gear sets are selectively connected and disconnected by the friction members so that the speed and direction of rotation of each gear are changed. Through this shifting operation, a vehicle can drive with one of ten or more forward speed gear ratios and one or more reverse speed gear ratios.

Abstract: A transmission may include input shaft connected to second rotary element of the third planetary gear set and first clutch; first shaft connecting first rotary element of the second planetary gear set, and second clutch; second shaft connecting first rotary element of the third planetary gear set and first brake; third shaft connecting first rotary element of the first planetary gear set and third clutch; fourth shaft connecting third rotary element of the fourth planetary gear set, the third clutch, and second brake; fifth shaft connecting second rotary element of the first planetary gear set, second rotary element of the second planetary gear set, and third rotary element of the third planetary gear set; and sixth shaft connecting third rotary element of the first planetary gear set, third rotary element of the second planetary gear set, first rotary element of the fourth planetary gear set, and fourth clutch.

Abstract: Disclosed is a vehicle transmission capable of improving fuel economy and performance of a vehicle with an increased number of gear stages. The vehicle transmission includes three simple planetary gear sets and one compound planetary gear set or includes five simple planetary gear sets. A shifting operation is performed by changing speed and direction of rotation of gears in a manner of selectively connecting and disconnecting rotary elements of the gear sets and a plurality of friction members. The vehicle transmission provides ten or more forward speed ratios and one or more reverse speed ratios through this shifting operation.

Abstract: Disclosed is mobile communication network failure monitoring system including: section-specific index value collecting unit for collecting a quantified index value about predetermined index which indicates communication situation of each corresponding communication section between nodes included in mobile communication network; index value pattern detecting unit for detecting index value pattern of mobile communication network by using index values collected according to each of communication sections; index value pattern learning unit for storing index value pattern of mobile communication network detected when failure of mobile communication network occurs, and corresponding failure cause, and then learning index value pattern of each failure cause of the mobile communication network; and failure information providing unit which compares index value pattern of mobile communication network detected during predetermined failure monitoring time and learned index value pattern, and then provides information on

Abstract: A vehicle transmission realizes speed change via variation in rotation speed and direction by selective control operation using combinations of six friction elements and a plurality of rotating elements of four planetary gear devices, and enables vehicle driving by realizing at least ten stage gear ratios for forward movement and at least one stage gear ratio for backward movement based on different speeds, wherein the vehicle transmission may increase fuel efficiency and power performance resulting from the multiple stages of the transmission.

Abstract: Disclosed is a transmission for a vehicle that can improve fuel efficiency by implementing multiple steps of shifting and improve vehicle driving comfort by using operating points in a low RPM range of an engine. According to the transmission, since three single planetary gear sets and one compound planetary gear set are combined or five single planetary gear sets are compound and the rotary elements of the planetary gear sets and friction members are selectively connected and disconnected, their rotational speeds and directions are changed when shifting is performed. Therefore, a vehicle can be driven with the gear ratios of ten or more steps of forward shifting and one step of reverse shifting.

Abstract: A transmission apparatus may include an input shaft and an output shaft; first to fourth planetary gear devices, each of which is disposed between the input shaft and the output shaft to transfer and has three rotation elements; and six gear-shifting elements connected to the rotation elements of the planetary gear devices, wherein a first rotation element of the first planetary gear device is fixedly connected to a first rotation element of the second planetary gear device, a second rotation element of the first planetary gear device is fixedly connected to a third rotation element of the second planetary gear device and to a third rotation element of the fourth planetary gear device, and a third rotation element of the first planetary gear device is fixedly connected to a third rotation element of the third planetary gear device and to a second rotation element of the fourth planetary gear device.

Abstract: A multi-stage transmission includes an input shaft, an output shaft, a first planetary gear set, a second planetary gear set, a third planetary gear set, and a fourth planetary gear set. Each planetary gear set includes three rotating elements. Six shifting elements are connected to the rotating elements of the first, the second, the third and the fourth planetary gear sets. A first rotating element of the first planetary gear set is fixedly connected to a first rotating element of the second planetary gear set and a second rotating element of the third planetary gear set and is selectively connected to the input shaft. A second rotating element thereof is fixedly connected to a third rotating element of the third planetary gear set and a third rotating element of the fourth planetary gear set. A third rotating element thereof is selectively connected to the input shaft.

Abstract: A vehicle transmission includes: four planetary gear sets and six friction elements which may be combined such that the rotation speed and direction are changed by selectively interrupting operations using the rotation elements of the planetary gear sets and the plurality of friction elements, wherein with such a shifting action, the vehicle may be driven by implementing gear ratios of at least ten forward stages and at least one reverse stage.

Abstract: A transmission for electric vehicles may include a first input shaft receiving a rotational force from a first motor; a second input shaft receiving a rotational force from a second motor; a one-way clutch mounted between the first and second input shafts, transferring only a forward rotation of the first input shaft to the second input shaft, and transferring only a reverse rotation of the second input shaft to the first input shaft; an output shaft disposed in parallel to the first and second shafts; a gear shifting device coupled to the first input shaft and the output shaft and coupled to the second input shaft and the output shaft, wherein the gear pairs have different shift ratios, and a gear pair corresponding to a driving speed is selected by a clutch device; and an idler gear coupled between gears coupled to the second input shaft and the output shaft.

Abstract: A multi-stage transmission is disclosed. The multi-stage transmission includes: two simple planetary gear sets, each including three rotary elements; one compound planetary gear set including four rotary elements; and six shifting elements. Since ten forward shifting stages and one reverse shifting stage can be accomplished with a relatively small number of parts, a simple construction and a low weight, the multi-stage transmission provides a further improved speed ratio for the driving conditions of the vehicle, thereby improving the fuel efficiency of the vehicle.

Abstract: A multi-stage transmission for vehicles includes an input shaft for receiving power from an engine, an output shaft for outputting the power, a first planetary gear device, a second planetary gear device, a third planetary gear device, and a fourth planetary gear device. Each of the planetary gear devices has three rotary elements, a first rotary shaft connected to the input shaft, a second rotary shaft, a third rotary shaft, a fourth rotary shaft, a fifth rotary shaft, a sixth rotary shaft, a seventh rotary shaft, and an eighth rotary shaft connected to the third rotary element of the third planetary gear device, to the second rotary element of the fourth planetary gear device, and to the output shaft.

Abstract: A multi-stage transmission for a vehicle, may include an input shaft and an output shaft; a first planetary gear set, a second planetary gear set, a third planetary gear set, and a fourth planetary gear set provided to transfer a torque between the input shaft and the output shaft and each including three rotation elements; and seven shifting elements connected to the rotation elements of the planetary gear sets.

Abstract: Disclosed herein is a multi-stage transmission for a vehicle. The multi-stage transmission includes an input shaft IN and an output shaft OUT; a first planetary gear set PG1, a second planetary gear set PG2, a third planetary gear set PG3, and a fourth planetary gear set PG4 installed between the input shaft IN and the output shaft OUT so as to transfer a torque and each including three rotary elements; and six shifting elements connected to the rotary elements of the first to fourth planetary gear sets.

Abstract: A vehicular multi-stage transmission is provided. In particular, the transmission includes an input shaft and an output shaft. A first planetary gear set, a second planetary gear set, a third planetary gear set, a fourth planetary gear set, and a fifth planetary gear set (PG5) are provided and each is disposed between the input shaft and the output shaft to transfer a rotational force and has three rotation elements. Additionally, at least six gear-shifting elements are connected to the rotation elements of the planetary gear sets.

Abstract: Disclosed herein is a multi-stage transmission for a vehicle. The multi-stage transmission includes an input shaft IN and an output shaft OUT; a first planetary gear set PG1, a second planetary gear set PG2, a third planetary gear set PG3, and a fourth planetary gear set PG4 installed between the input shaft IN and the output shaft OUT so as to transfer a torque and each including three rotary elements; and six shifting elements connected to the rotary elements of the first to fourth planetary gear sets.

Abstract: A multi-stage transmission for vehicles includes an input shaft for receiving power from an engine, an output shaft for outputting the power, a first planetary gear device, a second planetary gear device, a third planetary gear device, and a fourth planetary gear device. Each of the planetary gear devices has three rotary elements, a first rotary shaft connected to the input shaft, a second rotary shaft, a third rotary shaft, a fourth rotary shaft, a fifth rotary shaft, a sixth rotary shaft, a seventh rotary shaft, and an eighth rotary shaft connected to the third rotary element of the third planetary gear device, to the second rotary element of the fourth planetary gear device, and to the output shaft.

Abstract: A multi-stage transmission for vehicles includes an input shaft for receiving power from an engine; an output shaft for outputting the power; and a first, a second, a third, and a fourth planetary gear device. Each of the planetary gear devices has three rotary elements. The transmission further includes a first rotary shaft connected to the input shaft; a second rotary shaft; a third rotary shaft; a fourth rotary shaft; a fifth rotary shaft; a sixth rotary shaft; a seventh rotary shaft connected to a first rotary element of the third planetary gear device; and an eighth rotary shaft connected to a third rotary element of the fourth planetary gear device and to the output shaft.

Abstract: A vehicle transmission includes: four planetary gear sets and six friction elements which may be combined such that the rotation speed and direction are changed by selectively interrupting operations using the rotation elements of the planetary gear sets and the plurality of friction elements, wherein with such a shifting action, the vehicle may be driven by implementing gear ratios of at least ten forward stages and at least one reverse stage.