Hyundai Motor Company

Heera Lee

Baekyu Kim

Chulmin Ahn

SungGon Byun

Hyunsup Kim

Insup Kim

Seokjoon Kim

Yeonho Kim

YoungChul Kim

Kyungha Kim

Jaeshin Yi

Wansoo Kim

Talchol Kim

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.

Transmission system of hybrid electric vehicle

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.

The transmissions for a hybrid vehicle according to the present invention provide multiple electric vehicle modes, multiple power split modes, and multiple fixed-gear ratio modes, thereby increasing driving performance and fuel efficiency.

Transmission for hybrid vehicle

Growing community of inventors

Anyang-si, South Korea

Heera Lee