Hyundai Motor Company

Taeseok Seo

Donghoon Park

Seongeun Yun

Jinhaeng Lee

A continuously variable transmission for a vehicle may include an input shaft receiving torque of an engine, a first power delivery shaft disposed in parallel with and apart from the input shaft, a variable shift apparatus configured to change rotation speed of the input shaft and transmit the changed rotation speed to the first power delivery shaft, a second power delivery shaft selectively receiving torque of the first power delivery shaft, a third power delivery shaft disposed apart from the second power delivery shaft, a planetary gear set including first, second, and third rotation elements, and an idle gear set operably connecting the input shaft with the first rotation element of the planetary gear set in which the second rotation element is directly connected to the third power delivery shaft and the third rotation element is directly connected to the second power delivery shaft.

Continuously variable transmission for vehicle

A gear train of an automatic five-speed transmission includes an input shaft for transferring the power of an engine via a torque converter, a first-speed drive gear mounted on the input shaft, a first-speed driven gear meshed with the first-drive gear to produce a reduced speed ratio, an output shaft for transferring the power received from the first-speed driven gear to a differential gear, a planetary gear unit connected with the input shaft, a first friction element selectively connected with the input shaft and output shaft for producing a first reduced speed ratio, a second friction element selectively connected with the input shaft for transferring the input power through a first power transfer member to a first sun gear of the planetary gear unit to produce a second reduced speed ratio, a third friction element selectively connected with the input shaft for transferring the input power through a second power transfer member to the planetary carrier of the planetary gear unit serving as an input element, and a fourth friction element for gripping a third power transfer member to employ as a reacting element a second sun gear receiving the rotational force of the first sun gear of the planetary gear unit serving as an input element.

Growing community of inventors

Hwaseong-si, South Korea

Taeseok Seo