Hyundai Motor Company

Kia Motors Corporation

Won Seok Oh

Kang Hoon Lee

Jae Young Jeon

Hyung Min Kim

Sang Hyun Lee

In Chan Kim

Sung Hoon Park

An automatic transmission includes: first, second, and third planetary gear sets each having three rotating elements; seven coupling elements variably providing a frictional force; and seven shafts. In particular, a first shaft is fixedly connected to a second rotating element of the third planetary gear set and an input shaft, a third shaft is fixedly connected to a third rotating element of the second planetary gear set, a fourth shaft is fixedly connected to a first rotating element of the second planetary gear set and a third rotating element of the third planetary gear set, a sixth shaft is directly connected to a first rotating element of the third planetary gear set and a transmission casing, a seventh shaft is fixedly connected to a third rotating element of the first planetary gear set and an output shaft, and remaining two shafts are selectively fixed to the transmission casing.

Automatic transmission for vehicle

A return spring common structure of an automatic transmission may include a second plate set and a third plate set provided to be transversely movable in a retainer connected to a first rotating element, a second disc set and a third disc set configured to be rubbed against each plate set to connect between the first rotating element and a second rotating element, a second piston and a third piston configured to press each plate set to be rubbed against each disc set, and a common return spring configured to separate the second piston or the third piston from the second plate set or the third plate set.

Return spring common structure of automatic transmission

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

Growing community of inventors

Incheon, South Korea

Won Seok Oh