Abstract: An automatic transmission realizes forward 10-speed and reverse 1-speed shift stages by including an input shaft; a first planetary gear set; a second planetary gear set connected through one part and selectively connected through another part with the first planetary gear set, and receiving power from the input shaft; a third planetary gear set connected with the first planetary gear set through one part and selectively connected with the first planetary gear set through another part, and selectively connected with the second planetary gear set; a fourth planetary gear set selectively connected to a transmission housing, selectively connected with the first planetary gear set, selectively connected with the second planetary gear set, and connected with the third planetary gear set through one part and selectively connected with the third planetary gear set through another part; and an output shaft connected with the third planetary gear set, and outputting speed-shifted power.

Abstract: An automatic transmission includes an input shaft; an output shaft; a first planetary gear set including rotation elements; a second planetary gear set connected to the input shaft, and including a rotation element which is connected with the first planetary gear set; a third planetary gear set including a rotation element which is connected with the first planetary gear set, and connected with the output shaft; a fourth planetary gear set including rotation elements which are connected with the second planetary gear set and the third planetary gear set, respectively; a rotation shaft unit connected to the first to the fourth planetary gear sets, and transferring power; three clutches selectively connecting predetermined elements of the rotation shaft unit or selectively connecting predetermined elements of the rotation shaft unit and the input shaft; and four brakes selectively connecting predetermined elements of the rotation shaft unit and a transmission housing.

Abstract: Disclosed herein is an eight-speed powertrain of a vehicle automatic transmission, including first, second, third, and fourth planetary gear sets, each having a plurality of operational elements, an input shaft connected to a second planetary carrier while power of a vehicle engine is input to the input shaft, an output shaft connected to a fourth ring gear while varied torque is output from the output shaft, a plurality of rotary shafts interconnecting the operational elements, a plurality of brakes, and a plurality of clutches selectively connecting the rotary shafts.

Abstract: A double clutch transmission (DCT) provides eight forward speeds and one reverse speed while minimizing the number of gear trains used for changing speed and the whole length thereof. In particular, the DCT has a simple structure using four or five gear trains and four synchro devices and is capable of providing eight forward speeds and one reverse speed while reducing the entire weight thereof. In a conventional DCT, when a gear train is added to increase the number of speed stages, the whole length thereof is increased. The provided DCT can minimize the whole length and the weight thereof, thereby reducing the manufacturing cost, the number of parts, and the fuel efficiency.

Abstract: The present invention relates to a power train of an automatic transmission, which includes seven rotating elements configured through two planetary gear sets, and selectively fastens three rotating elements through four clutches and three brakes, thereby providing nine forward speeds and one reverse speed.

Abstract: The present invention relates to a powertrain for an automatic transmission. The powertrain for an automatic transmission consisting of an input shaft, an output shaft and first to third planetary gear sets comprises: first to seventh actuating elements constituting the first to third planetary gear sets; and shifting elements including first to fourth clutches and first and second brakes, wherein at least two of the shifting elements are actuated so that the first to seventh actuating elements are driven or restrained, thereby implementing eight forward speed and two reverse speed ratios.

Abstract: Disclosed herein is an eight-speed powertrain of a vehicle automatic transmission, including first, second, third, and fourth planetary gear sets, each having a plurality of operational elements, an input shaft connected to a second planetary carrier while power of a vehicle engine is input to the input shaft, an output shaft connected to a fourth ring gear while varied torque is output from the output shaft, a plurality of rotary shafts interconnecting the operational elements, a plurality of brakes, and a plurality of clutches selectively connecting the rotary shafts.

Abstract: The present invention relates to a powertrain for an automatic transmission. The powertrain for an automatic transmission consisting of an input shaft, an output shaft and first to third planetary gear sets comprises: first to seventh actuating elements constituting the first to third planetary gear sets; and shifting elements including first to fourth clutches and first and second brakes, wherein at least two of the shifting elements are actuated so that the first to seventh actuating elements are driven or restrained, thereby implementing eight forward speed and two reverse speed ratios.

Abstract: The present invention relates to a dual clutch device which comprises: a retainer portion to which a rotation force is transmitted; a pair of plate portions provided to the retainer portion; disc portions which are respectively arranged at the plate portions; a hub portion connected to the disc portion; piston portions which respectively apply pressure to the plate portions; driving portions which respectively move the piston portions; and a restoration portion which is arranged between the driving portions and provides a restoration force to the piston portions. The dual clutch device, according to the invention, uses one restoration portion, thereby simplifying a flow path and reducing the size of a product.

Abstract: The present invention provides a 10-shift power train of an automatic transmission for a vehicle, comprising: a first planetary gear set including a first sun gear selectively connected to a transmission casing, a first ring gear selectively connected to the transmission casing, and a first planetary carrier for integrally connecting a plurality of single pinions engaged between the first sun gear and the first ring gear; a second planetary gear set including a second sun gear directly connected to the first sun gear, a second planetary carrier directly connected to an input shaft and selectively connected to a third sun gear, and a second ring gear selectively connected to a fourth ring gear; a third planetary gear set including a third sun gear selectively connected to the second planetary carrier, a third planetary carrier selectively connected to the second ring gear, and a third ring gear selectively connected to the second ring gear; and a fourth planetary gear set including a fourth sun gear directly c

Abstract: An automated manual transmission is provided to implement seven forward gear changes and one reverse gear change. The automated manual transmission includes: a first input shaft; a second input shaft; a driving gear section mounted to the first and second input shafts; a clutch section for transmitting or blocking the power of the engine; a first output shaft to which the power is transmitted from the first input shaft or the second input shaft; a second output shaft to which the power is transmitted from the first input shaft or the second input shaft; a driven gear section including a plurality of driven gears which are mounted on the first output shaft and the second output shaft; and a synchronization section for connecting or disconnecting the first output shaft and the second output shaft. The clutch section includes a first clutch mounted to the first input shaft and a second clutch mounted to the second input.

Abstract: The present invention relates to a dual clutch device which comprises: a retainer portion to which a rotation force is transmitted; a pair of plate portions provided to the retainer portion; disc portions which are respectively arranged at the plate portions; a herb portion connected to the disc portion; piston portions which respectively apply pressure to the plate portions; driving portions which respectively move the piston portions; and a restoration portion which is arranged between the driving portions and provides a restoration force to the piston portions. The dual clutch device, according to the invention, uses one restoration portion, thereby simplifying a flow path and reducing the size of a product.

Abstract: The present invention pertains to an automated manual transmission, and particularly to an automated manual transmission which can implement 7 forward gear changes and 1 reverse gear change.

Abstract: An automated manual transmission includes first and second power input shafts, a drive gear part, a clutch arranged to transmit or interrupt the power of the engine to the first or second input shaft, first and second power output shafts to which power is transmitted from the first or second input shaft, driven gearing including a plurality of driven gears on the first and second output shafts, and a synchronizer connecting or disconnecting the first output shaft or the second output shaft and the driven gear to provide multi-stage gear shift steps. The clutch includes first and second clutches installed at the first and second input shafts to transmit or interrupt input engine power. An example of such transmission having 8 forward speeds and one reverse speed is described.