Hyundai Motor Company

Kia Motors Corporation

In Chan Kim

Tae Seok Seo

Hyu Tae Shim

Il Dae Cho

Sang Hyun Lee

Byung Dae Choi

Sung Hoon Park

Won Seok Oh

A powertrain may include an input shaft; a drive pulley and a driven pulley engaged to each other by a belt; a forward/backward switching mechanism provided to selectively switch a direction of power from the input shaft to the drive pulley by a plurality of friction members and transmit the power; a gear train provided to transmit the power of the input shaft to a rotation shaft of the driven pulley without passing through the drive pulley; and another friction member provided to interrupt a power transmission path of the gear train.

Continuously variable powertrain for vehicle

A continuously variable powertrain for vehicles may include an input shaft, a planetary gear train connected to the input shaft, a first clutch disposed to selectively connect rotation elements of the planetary gear set, a drive pulley disposed to receive power from the input shaft through the planetary gear set, a driven pulley connected to the drive pulley by a belt, an output shaft disposed concentrically with an axis of rotation of the driven pulley, a gear train connected between the input shaft and the output shaft in an external gear form, a second clutch disposed to transmit power from the input shaft through the gear train to the output shaft, and a third clutch disposed to transmit power from the driven pulley to the output shaft.

Continuously variable powertrain for vehicles

A multi-stage automatic transmission in which planet gear mechanisms, external gears and friction elements are combined in order to realize nine forward gears and one rearward gear having excellent operating conditions for friction elements and superior shift range ratios, thereby achieving excellent power performance and fuel efficiency.

Multi-stage automatic transmission

A continuously variable transmission may include a shift belt apparatus and a forward/reverse control apparatus. The forward/reverse control apparatus may include a planetary gear set consisting of first and second planetary gear sets, first clutch, and first and second brakes. The planetary gear set may include a first rotation element directly connected to an input shaft so as to be always operated as an input element, a second rotation element selectively connected to the input shaft through the first clutch so as to be operated as a selective input element and selectively connected to a transmission housing through the second brake so as to be operated as a selective fixed element, a third rotation element directly connected to an output shaft so as to be always operated as an output element, and a fourth rotation element selectively connected to the transmission housing through the first brake so as to be operated as a selective fixed element.

Continuously variable transmission for vehicle

A fuel door opening/closing apparatus for a vehicle is configured to lock and release a fuel door for opening and closing an oil filling opening of the vehicle. The fuel door opening/closing apparatus for a vehicle includes a housing mounted to a hinge of a fuel door rotatably mounted to a fuel door housing, a motor installed within the housing, a locking rod configured to be moved between a locking position for locking the fuel door and a releasing position for releasing a locked state of the fuel door, and a power transmission configured to receive power of the motor, convert rotation of the motor to linear movement, and transmit the linear movement to the locking rod.

Fuel door opening/closing apparatus for vehicle

Engine torque selectively inputted through first and second input shafts is received and changed selectively by first and second output devices respectively having first and second output shafts. A reverse driven gear is axially offset from drive gears on the first and second input shafts such that some gear teeth of the reverse driven gear are close to an exterior circumference of one of the first and second input shafts.

Double clutch transmission

Engine torque selectively inputted through first and second input shafts is received and changed selectively by first and second output devices respectively having first and second output shafts. A parking gear is disposed on one of the first and second output shafts in a transmission case at an axial position thereof corresponding to one drive gear engaged with one driven gear of another output shaft

A gear structure layout of a double clutch transmission includes a main input shaft for receiving an engine torque. A first and second input shaft rotating coaxially with the main input shaft. A first and second clutch, first and third drive gears formed on an input shaft, and second and fourth drive gears formed on the other input shaft. A first output device for selectively changing torques of the first, second, third, and fourth drive gears and for outputting the changed torque. A second output device for selectively changing torques of the first, second, third, and fourth drive gears and for outputting the changed torque. Also included is a differential gear commonly connected to the first output device and the second output device. The layout provides for only four drive gears on input shafts that enables a total of seven speeds, and a compact double clutch transmission.

Growing community of inventors

Yongin-si, South Korea

In Chan Kim