Hyundai Motor Company

Seokjoon Kim

Baekyu Kim

Chulmin Ahn

SungGon Byun

Hyunsup Kim

Insup Kim

Heera Lee

Jaemoon Lee

KwangMin Choi

JongPil Kim

Samgyun Kim

Jaeyoung Jeun

Junhoi Huh

Taesic Park

Seungwoo Ha

A transmission system of a hybrid electric vehicle may include an input shaft connected to an engine, a planetary gear set including a first rotation element operated as an output element, a second rotation element connected to the input shaft and operated as an input element, and a third rotation element operated as another output element, a first motor operably connected to the first rotation element, and selectively connected to a transmission housing, a first motor/generator configured to generate electric energy by receiving torque through the first motor shaft, a second motor shaft being a hollow shaft, disposed at a radial exterior of the first motor shaft without rotational interference with the first motor shaft, and operably connected to the third rotation element so as to receive torque of the engine, and a second motor/generator disposed on the second motor shaft and outputting torque through the second motor shaft.

Transmission system of hybrid electric vehicle

A transmission system of a hybrid electric vehicle may include an input shaft connected to an engine, a planetary gear set including a first rotation element operated as an output element, a second rotation element connected to the input shaft and operated as an input element, and a third rotation element operated as another output element, a first motor shaft disposed in parallel to and apart from the input shaft, operably connected to the first rotation element, and selectively connected to a transmission housing, a first motor/generator disposed on the first motor shaft and configured to generate electric energy by receiving torque through the first motor shaft, a second motor shaft disposed without rotational interference with the first motor shaft and operably connected to the third rotation element to receive torque of the engine, and a second motor/generator disposed on the second motor shaft and outputting torque through the second motor shaft.

A transmission system of a hybrid electric vehicle may include first and second motor/generators, a planetary gear set, first and second output gears, a brake, a rotation restricting member on an axis of an input shaft receiving torque of an engine in a transmission housing and a hollow shaft disposed at a radial exterior of the input shaft and adapted to transmit the torque of the engine or torque of the first motor/generator to the second output gear, an outer shaft disposed at a radial exterior of the hollow shaft and adapted to transmit torque of the second motor/generator to the first output gear, and a rear cover coupled to a rear end portion of the transmission housing.

A transmission system of a hybrid electric vehicle may include first and second motors/generators, a planetary gear set, a first output gear for the second motor/generator, a second output gear for an engine, an under drive first clutch, and an over drive second clutch, disposed on or coupled to an input shaft. A hollow shaft is configured at an outer circumference side of the input shaft to transmit accelerated power of the engine or power of the first motor/generator to the second output gear and an outer shaft at an outer circumference side of the hollow shaft to transmit power of the second motor/generator to the first output gear. The first and second clutches are adjacently disposed at an engine side on the input shaft, and selectively transmit each of rotational power of the input shaft and rotational power of the hollow shaft to the second output gear.

A transmission system of a hybrid electric vehicle may include first and second motor/generators, a planetary gear set, first and second output gears, and first and second clutches on an axis of an input shaft receiving torque of an engine in a transmission housing, a hollow shaft disposed at a radial exterior of the input shaft and adapted to transmit the torque of the engine or torque of the first motor/generator to the second output gear, an outer shaft disposed at a radial exterior of the hollow shaft and adapted to transmit torque of the second motor/generator to the first output gear, and a rear cover coupled to a rear end portion of the transmission housing, in which the planetary gear set includes a sun gear, a planet carrier and a ring gear as rotation elements thereof.

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Yongin-si, South Korea

Seokjoon Kim