Abstract: A dual-clutch transmission may include: a first input shaft and a second input shaft mounted concentrically to the first input shaft; a first clutch mounted to the first input shaft to selectively transmit power to the first input shaft; a second clutch mounted to the second input shaft to selectively transmit power to the second input shaft; a first output shaft and a second output shaft mounted in parallel with the first input shaft and the second input shaft; an input shaft connection device provided to switch a power transmitting and a blocking state between the first input shaft and the second input shaft by use of a selection output shaft; a plurality of drive gears mounted on the first input shaft and the second input shaft; and a plurality of driven gears mounted on the first output shaft and the second output shaft engaged with the plurality of drive gears to form each shifting stage.

Abstract: A double clutch transmission (DCT) may include a first input shaft and a second input shaft disposed to or not to receive power from the same power source, respectively; a first output shaft and a second output shaft each disposed in parallel with the first input shaft; a first drive gear disposed on and rotated with the first input shaft; a second drive gear disposed on and rotated with the second input shaft; a first driven gear engaged with the first drive gear and rotatably disposed on a selection output shaft which is one of the first output shaft and the second output shaft; a second driven gear engaged with the second drive gear and rotatably disposed on the selection output shaft; and a sleeve synchronizer selectively connecting between the first driven gear and the second driven gear.

Abstract: A power transmission apparatus includes: a first input shaft always receiving an input torque from an engine; second and third input shafts coaxially disposed and selectively connected with the first input shaft; a torque mediating shaft selectively connected with the first input shaft or a transmission housing; first and second intermediate shafts and an output shaft respectively disposed in parallel with the first input shaft; a first preliminary shifting section receiving a torque through a first input gear set, selectively shifting the received torque, and outputting the shifted torque; a second preliminary shifting section including a second shifting gear set which outputs a torque from the first input shaft and stops; and a compound shifting section forming an output torque by the input torque and the first and second shifted torques.

Abstract: A powertrain may include drive gears provided in an input shaft; an output shaft configured such that a differential is connected thereto; a first driven gear and a second driven gear rotatably provided in the output shaft to be engaged with the drive gears to form respective gear stages; a first clutch and a second clutch; two driveshafts provided to output power in opposed directions from the differential; and a third clutch configured to change a connection relationship among a selected driveshaft of the two driveshafts, the second driven gear, and the output shaft by sliding along an axial direction of the input shaft while being connected to the output shaft via the second clutch.

Abstract: A power transmission apparatus includes a first input shaft receiving an input torque, second and third input shafts coaxially disposed and selectively connected with the first input shaft, first and second torque mediating shafts coaxially disposed with the first input shaft, first and second intermediate shafts and an output shaft disposed in parallel with the first input shaft, a first shifting section receiving a torque from the third input shaft and outputting a plurality of first shifted torques, a second shifting section including a first planetary gear set selectively connected with the first input shaft and outputting a plurality of second shifted torques, and a compound shifting section forming an output torque by the input torque and the first and second shifted torques.

Abstract: A powertrain for a vehicle may include a first planetary gear set configured such that a first rotation element of three rotation elements thereof is connected to an input shaft; and a first clutch device and a second clutch device provided in series between a second rotation element and a third rotation element of the first planetary gear set to directly connect the second rotation element and the third rotation element, wherein the second clutch device is configured to selectively lock the third rotation element; and the second rotation element of the first planetary gear set functions as an output element of the first planetary gear set.

Abstract: A dual clutch transmission may include a first input shaft having a plurality of odd stage driving gears; a second input shaft disposed to have a concentric shaft with the first input shaft and including a plurality of even stage driving gears; an output shaft; a counter shaft disposed parallel to the first input shaft, the second input shaft, and the output shaft to continuously transfer power to the output shaft and including odd stage driven gears engaged with the odd stage driving gears and even stage driven gears engaged with the even stage driving gears; a plurality of synchronous devices; a plurality of shift forks coupled to the plurality of synchronous devices; and one shift rail provided to commonly guide a linear sliding of the plurality of shift forks.

Abstract: A power transmission apparatus configured for a vehicle may include a first input shaft fixedly connected to a motor/generator, a second input shaft selectively connectable to the first input shaft, a third input shaft selectively connectable to the first input shaft, a torque mediating shaft externally disposed with the first input shaft, an intermediate shaft, an idle shaft, an output shaft, a first shifting section selectively receiving a torque from the third input shaft, shifting the received torque and outputting the shifted torque, a second shifting section shifting a torque from the first input shaft to the torque mediating shaft, or stopping a rotation of the torque mediating shaft, and a third shifting section selectively receiving a torques from the first and second shifting sections and a torque from the second input and outputting shifted torque to the output shaft.

Abstract: A torque converter system of a vehicle for delivering an input torque to a transmission may include a front cover of a torque converter receiving the input torque through a torque receiving shaft, an impeller of the torque converter receiving the input torque through the front cover, a turbine of the torque converter disposed opposed to and coaxially with the impeller and rotated by an operation fluid supplied from the impeller thereby driving a transmission input shaft, a reactor of the torque converter disposed between the impeller and the turbine and redirecting the operation fluid from the turbine toward the impeller, and a lock-up clutch disposed inside a transmission to selectively connecting the front cover and the turbine.

Abstract: A synchronizer apparatus for a transmission includes: first and second shifting gears rotatable on an output shaft; a hub spline-coupled with the output shaft and having a slope portion having slanted surfaces; a sleeve spline-coupled with the hub; a key coupled with a recess of a slope portion; first and second clutch gears disposed between the hub and shifting gears; first and second outer rings and first and second inner rings disposed between the hub and clutch gears; first and second synchronizer cones disposed between the first inner and outer rings and the second inner and outer rings; a poppet ball unit disposed at the sleeve and contacting the key through a poppet ball; first and second push blocks disposed at the slanted surfaces; and first and second push springs inserted in spring holes formed at the push blocks to force push blocks to the slanted surfaces.

Abstract: A powertrain for a vehicle may include a compound planetary gear set configured such that, of four rotation elements, a first rotation element is connected to an input shaft and a second rotation element is connected to an output element; a brake provided to connect a rotating body to a transmission housing to be locked thereto; a first clutch device provided to switch a connection state of the rotating body between a third rotation element and a fourth rotation element of the compound planetary gear set; and a second clutch device provided to switch a connection state of the second rotation element of the compound planetary gear set to the input shaft.

Abstract: A power transmission apparatus for a vehicle may include a first input shaft directly connected with a motor/generator, second and third input shafts and torque mediating shaft coaxial and selectively connected with the first input shaft, a first intermediate shaft and first and second idle shafts in parallel with the first input shaft, a second intermediate shaft in parallel with the first input shaft, and selectively connected with a transmission housing, an output shaft in parallel with the first input shaft, and coaxial and selectively connected with the second intermediate shaft, a first shifting section including six gear sets, selectively receiving torque through the first and third input shafts, and outputting intermediate shift-stages, and a second shifting section including a planetary gear set, forming an output torque by combination torques from the first shifting section and the second input shaft, and outputting the output torque to the output shaft.

Abstract: A transmission for an electric vehicle, may include a concentric deceleration device for receiving power from a motor shaft and for decelerating; an output shaft disposed in parallel with the input shaft; a hollow shaft rotatably provided on the input shaft; a clutch device provided to switch the transmission state of power from the input shaft to the hollow shaft; a first synchronizer having a hub fixed to the input shaft; a second synchronizer having a hub fixed to the hollow shaft; a plurality of driving gears having different sizes and provided on the input shaft and the hollow shaft to be engaged with at least one of the first synchronizer and the second synchronizer; and a plurality of driven gears provided on the output shaft to be engaged with the plurality of driving gears to form different shift ratios, respectively.

Abstract: A gear shifting apparatus for a multi-speed transmission includes a shifting unit controlling gear shifting by a torque of an actuator and a parking unit controlling a parking state by the torque of the actuator. The actuator includes a control motor transmitting a driving torque to driven gears of the shifting and parking units through a drive gear externally gear-meshed with the driven gears. The shifting unit includes a cam block connected to a first driven gear engaged with the drive gear and having a cam surface on an exterior circumference for shift-stages for controlling gear shifting. In addition, the parking unit includes a parking gear and a parking sprag having an engagement end for controlling engagement and disengagement of a parking state.

Abstract: A gear shifting apparatus for a multi-speed transmission includes: a shifting unit controlling gear shifting by a torque of an actuator; and a parking unit controlling a parking state by the torque of the actuator. In particular, the actuator includes a control motor transmitting a driving torque to driven gears of the shifting and parking units through a drive gear, and the shifting unit includes: a fork slider slidably mounted on a fork rail; a shift fork integrally formed with the fork slider; a finger drum connected to a first driven gear engaged with the drive gear, and having a finger end; and a shift lug that rotates about a lug shaft and includes two lug ends having a different length from each other. The shift lug interacts with the finger end, and has a coupler end coupled with a pocket portion formed at the fork slider.

Abstract: A gear shifting apparatus for a multi-speed transmission includes: a shifting unit controlling gear shifting by an actuator, and a parking unit controlling parking by the actuator. In particular, the actuator includes a control motor driving a driven gear through a drive gear externally gear-meshed with the driven gear, and the shifting and parking units are operated by a force received from a cam block fixed to the driven gear. The shifting unit includes a fork slider slidably mounted on a fork rail, a shift fork integrally formed with the fork slider, and a cam contact pin integrally formed with the fork slider and contacting the cam block.

Abstract: An oil pressure supply system distributes lubrication for a dual clutch transmission and an includes a mechanical oil pump pumping oil stored in a sump while being driven by an engine; a line regulator valve directly supplying a lubrication flow rate to an input shaft and a counter shaft by controlling the oil pressure supplied from the mechanical oil pump and simultaneously supplying the lubrication flow rate to a gear train and clutch through another path; a line pressure control valve variably exhausting the lubrication oil pressure when the lubrication oil pressure supplied to the input shaft and the counter shaft is a predetermined value or more; an electric oil pump pumping the oil depending on a control of a transmission control unit; a first lubrication switch valve selectively blocking oil pressure supplied from the electric oil pump to the gear train and the clutch; and a second lubrication switch valve switching a flow path so that oil pressure supplied from the line regulator valve and the first l

Abstract: A gear shifting apparatus for a multi-speed transmission for an electric vehicle includes a shifting unit controlling gear shifting by a torque of an actuator, and a parking unit controlling a parking state by the torque of the actuator. In particular, the actuator includes a control motor transmitting a driving torque to a first driven gear and a second driven gear through a drive gear externally gear-meshed with the driven gears, and the shifting unit includes: a shift fork slidably mounted on a fork rail and activating the gear shifting; a profile drum connected to the first driven gear externally engaged with the drive gear, and having a profile groove formed along an exterior circumference of the profile drum; and a shift lug integrally formed with the shift fork and coupled with the profile groove.

Abstract: A gear shifting apparatus for a multi-speed transmission includes: a shifting unit controlling gear shifting by a torque of an actuator; and a parking unit controlling a parking state by the torque of the actuator. In particular, the actuator includes a control motor transmitting a driving torque to a first driven gear of the shifting unit and a second driven gear of the parking unit through a drive gear externally gear-meshed with the driven gears, and the shifting unit includes: a fork slider slidably mounted on a fork rail, a shift fork integrally formed with the fork slider, a cam block connected to the first driven gear engaged with the drive gear and having a cam surface on an exterior circumference for shift-stages, a cam contact pin integrally formed with the fork slider and contacting the cam surface, and a return spring mounted around the fork rail.

Abstract: An automotive transmission may include a first planetary gear set having first to third rotation elements, an input shaft engaged with the first rotation element of the first planetary gear set, an output shaft engaged with the second rotation element of the first planetary gear set, and a sleeve section sliding linearly along an axial direction of the first planetary gear set to selectively switch to a first state in which the third rotation element is secured to a transmission housing, a second state in which the third rotation element is engaged with a further rotation element, or a neutral state in which the third rotation element is not secured to or engaged with the transmission housing or the further rotation element.