Abstract: A transmission system for a hybrid electric vehicle includes an input shaft connected to an output side of an engine, first and second motors/generators having a function of a motor and a generator and disposed in a transmission housing, a planetary gear set disposed on the input shaft and including three rotating elements, in which among three rotating elements, a first rotating element is directly connected to the first motor/generator and selectively connected to the input shaft and the transmission housing, a second rotating element is directly connected to the input shaft, and a third rotating element is connected to an output gear and connected to the second motor/generator, and a connection unit disposed at the selective connection part.

Abstract: A transmission system of a hybrid electric vehicle may include an input shaft connected to an engine, first and second motors/generators disposed on a transmission housing, a planetary gear set disposed on the input shaft and having three rotation elements, of which one rotation element is connected to the transmission housing, another rotation element is connected to the input shaft, and the other rotation element is connected to the first motor/generator and operated as an output element, a first output gear disposed on the input shaft without rotational interference therebetween and connected to the second motor/generator, a second output gear disposed on the input shaft without rotational interference therebetween, and a first clutch selectively connecting the second output gear to the input shaft.

Abstract: A power transmission system of a hybrid electric vehicle may include an input shaft receiving torque of an engine, a first planetary gear set having at least three rotation elements, a second planetary gear set having at least three rotation elements, a clutch selectively connecting two rotation elements among the at least three rotation elements of the second planetary gear set, a brake selectively connecting a rotation element of the second planetary gear set to the transmission housing, and an output gear connected to a second motor/generator and the a rotation element of the second planetary gear set.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A power transmission system of a hybrid electric vehicle may include an input device including a first input shaft receiving torque of the engine and a second input shaft disposed without rotational interference with the first input shaft, a planetary gear set including a first rotation element directly connected to the second input shaft, a second rotation element directly connected to the first input shaft, and a third rotation element, a supplemental input device including a first intermediate shaft and a second intermediate shaft, a friction member selectively connecting the first intermediate shaft to a transmission housing, an output device operably connected to the input device and the supplemental input device and outputting torque transmitted from the input device or the supplemental input device, and a final reduction device decelerating torque transmitted from the output device and outputting the decelerated torque.

Abstract: A transmission system of a hybrid electric vehicle may include a first shaft connected to an engine, a first hollow shaft disposed without rotational interference with the first shaft, selectively connected to the first shaft, and provided with a first output gear, a second hollow shaft disposed without rotational interference with the first hollow shaft and provided with a second output gear, a second shaft disposed in parallel with the first shaft and connected to the first shaft through a gear unit, a clutch selectively connecting the first shaft to the first hollow shaft, a first motor/generator operably connected to the second hollow shaft, and a second motor/generator operably connected to the second shaft.

Abstract: A power transmission system of a hybrid electric vehicle may include an engine being a power source, a torque transmission device including four rotation shafts and a compound planetary gear set, the torque transmission device converting torque input from the engine, and outputting a converted torque, two supplemental power sources respectively connected to two rotation shafts among the four rotation shafts of the torque transmission device and supplying generated torque to the torque transmission device, two friction members selectively connecting two rotation shafts among the four rotation shafts of the torque transmission device to a transmission housing, an output device outputting torque transmitted from the torque transmission device, and a final reducing device decelerating torque transmitted from the output device and outputting the decelerated torque through a differential apparatus.

Abstract: A transmission system of a hybrid electric vehicle may include a first shaft connected to an engine, a first hollow shaft disposed without rotational interference with the first shaft and provided with a first output gear, a second hollow shaft disposed without rotational interference with the first hollow shaft and provided with a second output gear, a second shaft disposed in parallel with the first shaft and operably connected to the first shaft and the first hollow shaft through a gear unit so as to selectively transmit torque of the first shaft to the first hollow shaft, a clutch selectively connecting the second shaft to the first hollow shaft, a first motor/generator operably connected to the second hollow shaft, and a second motor/generator operably connected to the second shaft.

Abstract: A power transmission system of a hybrid electric vehicle may include an input shaft receiving torque of an engine, a first planetary gear set having at least three rotation elements, a second planetary gear set having at least three rotation elements, a clutch selectively connecting two rotation elements among the at least three rotation elements of the second planetary gear set, a brake selectively connecting a rotation element of the second planetary gear set to the transmission housing, and an output gear connected to a second motor/generator and the a rotation element of the second planetary gear set.

Abstract: A transmission system for a hybrid electric vehicle includes an input shaft connected to an output side of an engine, first and second motors/generators having a function of a motor and a generator and disposed in a transmission housing, a planetary gear set disposed on the input shaft and including three rotating elements, in which among three rotating elements, a first rotating element is directly connected to the first motor/generator and selectively connected to the input shaft and the transmission housing, a second rotating element is directly connected to the input shaft, and a third rotating element is connected to an output gear and connected to the second motor/generator, and a connection unit disposed at the selective connection part.

Abstract: A transmission for a hybrid vehicle is provided to implement one or more electric vehicle modes, two or more power split modes, and a plurality of fixed-gear ratio modes that can improve driving performance and fuel efficiency.

Abstract: A transmission system of a hybrid electric vehicle may include two shafts, two hollow shafts and two motor/generators. A first shaft connected to an engine. A first hollow shaft disposed without rotational interference with the first shaft, selectively connected to the first shaft, and provided with a first output gear. A second hollow shaft disposed without rotational interference with the first hollow shaft and provided with a second output gear. A second shaft disposed in parallel with the first shaft and operably connected to the first shaft and the first hollow shaft through a gear unit to selectively transmit torque of the first shaft to the first hollow shaft. Clutches may connect the first shaft and the second shaft selectively to the first hollow shaft. A first motor/generator operably connected to the second hollow shaft and a second motor/generator operably connected to the second shaft.

Abstract: A transmission system of a hybrid electric vehicle may include an input shaft connected to an engine, first and second motors/generators disposed on a transmission housing, a planetary gear set disposed on the input shaft and having three rotation elements, of which one rotation element is connected to the transmission housing, another rotation element is connected to the input shaft, and the other rotation element is connected to the first motor/generator and operated as an output element, a first output gear disposed on the input shaft without rotational interference therebetween and connected to the second motor/generator, a second output gear disposed on the input shaft without rotational interference therebetween, and a first clutch selectively connecting the second output gear to the input shaft.

Abstract: A transmission system of a hybrid electric vehicle may include: an input shaft connected to an engine; first and second motor/generators disposed on a transmission housing; a first planetary gear set disposed on the input shaft and having three rotation elements, wherein one rotation element is connected to the transmission housing, another rotation element is connected to the first motor/generator, and the other rotation element is connected to the input shaft; a second planetary gear set disposed on the input shaft and having three rotation elements, wherein one rotation element is connected to the transmission housing, another rotation element is connected to the second motor/generator, and the other rotation element is operated as an output element; an output gear connected to the other rotation element of the second planetary gear set; and a first clutch selectively connecting the input shaft to the output gear.

Abstract: A clutch actuator unit is provided that includes a housing having a mounting space and a penetration aperture for receiving an operating rod. A slide pad and slider are disposed along an inner side surface of the mounting space, and are configured to move back and forth within the housing. An operating rod that is connected to the slider through the penetration aperture is moved back and forth, along with the slider and slide pad, through the aperture via a drive portion. A stopper is also integrally formed along the front surface of the slide pad to limit the movement of the slider accordingly. In doing so, the disclosed actuator is able to dynamically locate certain stroke positions and provide an improved shifting operation.

Abstract: An exemplary embodiment of the present invention provides a power train for a hybrid vehicle can achieve three or more fixed gear ratio modes where a vehicle is driven at a fixed gear ratio, such as shift stages of common transmission, only by the driving force of an engine without driving a motor generator, as well as an electric vehicle mode, which is the basic drive modes of a hybrid vehicle, and two or more power division modes including an input division mode and a composite mode, thereby driving the vehicle with high efficiency in accordance with traveling conditions of the vehicle and improving fuel efficiency.

Abstract: A gear shifting system is described that includes an first shaft that is connected to a motor to be rotated thereby, a synchronizing gear, a first insert unit and a second insert unit protrude at both sides thereof, a first gear and a second gear configured to rotate around the first shaft, a first plate and a second plate, a first engagement aperture and a second engagement aperture, and a second shaft. The second shaft is configured to move the synchronizing gear in an axial direction so that the first insert unit is inserted into the first engagement aperture or the second insert unit is inserted into the second engagement aperture to transfer a torque of the synchronizing gear to the first gear or the second gear.

Abstract: Disclosed herein is clutch actuator unit that includes a housing that includes a mounting space and a penetration aperture for receiving an operating rode. A slide pad and slider are disposed along an inner side surface of the mounting space, and are configured to move back and forth within the housing. An operating rod that is connected to the slider through the penetration aperture is moved back and forth, along with the slider and slid pad, through the aperture via a drive portion. A stopper is also integrally formed along the front surface of the slide pad to limit the movement of the slider accordingly. In doing so, the disclosed actuator is able to dynamically locate certain stroke positions and provide an improved shifting operation.