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 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 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 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: A driving apparatus for a hybrid vehicle includes an engine, a motor having a stator and a rotor, and a transmission to which a driving force is delivered selectively from the engine, the motor or both the engine and the motor. The motor is provided between the engine and the transmission to transmit the driving force to the transmission. The motor can be an inner rotor-type motor in which the stator is disposed at an outer side of the motor and the rotor is disposed at an inner side of the motor or an outer rotor-type motor in which the stator is disposed at an inner side of the motor and the rotor is disposed at an outer side of the motor.

Abstract: A clutch actuator for a vehicle includes a lifting member having a first end connected to a power generator, a middle portion provided with a hinge point, and a second end formed with an inclined plane, the lifting member being linearly moved by receiving a power from the power generator; a guide member provided at one side of the second end of the lifting member to rotate the second end of the lifting member around the hinge point as the lifting member is linearly moved while the inclined planes are supported; and a lever provided at one side of the lifting member and having a first end thereof supported by a clutch housing and a second end rotating around the first end by being pressed by the lifting member according to the movement/rotation of the lifting member, to engage with or release a clutch.

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.

Abstract: Disclosed is a start control apparatus and method for a hybrid electric vehicle which provides starting of a second gear ratio or a first ratio based on an inclination of a road surface, a travel environment, and a state of the vehicle when the hybrid electric vehicle stops and then starts. The method includes: determining a state of the hybrid electric vehicle, a travel environment condition, and a state of charge (SOC) of a battery when a start request is detected in a stopped state while the vehicle maintains ignition on; determining whether the state of the hybrid electric vehicle, the travel environment condition, and the SOC of the battery satisfy start conditions of a second gear ratio; and when the start conditions are satisfied, controlling output torques of a motor and an engine corresponding to a torque requested from an accelerator pedal in an EV mode or an HEV mode.

Abstract: A dual clutch device for a vehicle may include a drive motor provided in a motor housing, a clutch housing connected to the motor housing wherein a clutch may be provided in the clutch housing, and a cooling oil flowing unit forming a hydraulic line fluid-connecting the motor housing and the clutch housing and supplying a cooling oil to the drive motor and the clutch through the hydraulic line.

Abstract: Disclosed is a power delivery device for a vehicle that improves power delivery efficiency. More specifically, the power delivery device includes a first motor having a first drive shaft directly connected to an output shaft of an engine, a second motor having a second drive shaft directly connected to an input shaft of a gearbox, and a clutch selectively connecting the output shaft of the engine with the input shaft of the gearbox.

Abstract: A power transmission system of a hybrid electric vehicle includes an input shaft, a first planetary gear set having a first rotation element, a second rotation element directly connected to the input shaft, and a third rotation element directly connected to a first motor/generator, a second planetary gear set having a fourth rotation element directly connected to the first rotation element and a second motor/generator, a fifth rotation element, and a sixth rotation element selectively connected to the second rotation element, an output gear connected to the fifth rotation element, a first clutch selectively connecting the engine with the input shaft, a second clutch selectively connecting the second rotation element with the sixth rotation element, a first brake interposed between the third rotation element and a transmission housing, and a second brake interposed between the sixth rotation element and the transmission housing.

Abstract: Disclosed are a power train structure that can operate hybrid vehicles in an electric mode at its startup and/or lower speed stages and a method of operation of the same.

Abstract: A double clutch transmission is described that ideally changes torque received from an engine and a motor by providing an optimal layout in power transmission scheme and motor location. Such a double clutch transmission is optimally adapted to a hybrid electric vehicle, and an optimal operation method for such a double clutch transmission is also provided, overcoming inefficiency in application of a conventional CVT to an HEV.

Abstract: Disclosed are a power train structure that can operate hybrid vehicles in an electric mode at its startup and/or lower speed stages and a method of operation of the same.

Abstract: A hybrid power train system for a vehicle that has a simple configuration and can efficiently transmit power generated from an engine and a motor to driving wheels while using a general transmission, and obtain high regenerative braking efficiency. The configuration includes coaxial shafts between rotational components.

Abstract: A double clutch transmission is described that ideally changes torque received from an engine and a motor by providing an optimal layout in power transmission scheme and motor location. Such a double clutch transmission is optimally adapted to a hybrid electric vehicle, and an optimal operation method for such a double clutch transmission is also provided, overcoming inefficiency in application of a conventional CVT to an HEV.

Abstract: An exemplary automatic transmission of a hybrid vehicle according to an embodiment of the present invention includes a flywheel connected to an engine, a generator having a stator part and a rotor part, an input shaft connected with the rotor part, a hub coupled to an end of the input shaft, and a torsional damper connecting the flywheel with the hub, wherein the torsional damper includes a torsional spring and a plate, an end of the stator part is projected further toward the engine than an end of the rotor part and forms a projected portion, a vacant space is formed inside the projected portion, the plate is formed to be bent such that a mounting part mounted to the torsional spring is nearer to the generator than a mounting part mounted to the flywheel, and at least a part of the torsional spring is disposed in the vacant part.