Hybrid drive module

Abstract

A hybrid drive module is disclosed. The hybrid drive module according to an embodiment of the present invention is a hybrid drive module for selectively transmitting rotational power transmitted from an engine and a motor to a transmission, and includes an internal chamber having an inlet and an outlet for a working fluid, a torsion damper having a torque input part and a torque output part rotationally fixed to the engine, and a one-way clutch connected to the torque output part, and the torsion damper and the one-way clutch may be disposed in the internal chamber.

Description

Technical Field

[0001] The present invention relates to a hybrid drive module, and more particularly to a hybrid drive module that transmits the rotational power input from an internal combustion engine and a motor to a transmission.

Background Art

[0002] Environmentally friendly technologies in vehicles are the core technologies of the future automotive industry, and automakers are putting all their efforts into developing environmentally friendly vehicles to meet environmental and fuel consumption regulations.

[0003] Future automotive technologies include electric vehicles (EVs) that utilize electric energy, hybrid electric vehicles (HEVs), and double clutch transmissions (DCTs) that improve efficiency and convenience.

[0004] The hybrid electric vehicle is a vehicle that uses two or more power sources and can be combined in various ways. Usually, it is composed of a gasoline engine or a diesel engine that uses existing fossil fuels and a motor / generator driven by electric energy that are hybridized.

[0005] Such a hybrid electric vehicle can significantly reduce harmful gas emissions and fuel consumption compared to general vehicles because it simultaneously mounts an internal combustion engine and a motor.

[0006] There has been a demand for the development of a drive module equipped with an engine clutch and a torque converter that can effectively transmit the rotational power of the engine and the motor to the transmission to improve efficiency, maximize fuel consumption, and enable effective power transmission, size reduction, and component reduction.

[0007] As a result, research and development is continuing on hybrid drive modules that integrate the functions of an engine clutch and torque converter with the motor of a hybrid electric vehicle (HEV) to efficiently combine and transmit the driving force of the engine and motor.

[0008] The information contained in this background section is provided to facilitate understanding of the background of the invention and may include information that is not prior art already known to those with ordinary skill in the art to which this art belongs. [Overview of the project] [Problems that the invention aims to solve]

[0009] Therefore, the present invention was made to solve the aforementioned problems, and the problem that the present invention aims to solve is to provide a hybrid drive module that simplifies the overall components and coupling structure by changing the structure of the engine clutch, thereby reducing manufacturing costs, and eliminates separate hydraulic lines and actuators by operating according to the rotational speed of the engine.

[0010] Another object of the present invention is to provide a hybrid drive module that mounts the engine clutch and torsion damper together inside the working fluid inflow, optimizes the arrangement of the torsion damper connected to the engine clutch, and enables a reduction in the overall outer diameter and axial length. [Means for solving the problem]

[0011] A hybrid drive module according to an embodiment of the present invention for achieving such objectives is a hybrid drive module for selectively transmitting rotational power transmitted from an engine and a motor to a transmission, comprising: an internal chamber having an inlet and an outlet for a working fluid; a torsion damper including a torque input section and a torque output section rotatably fixed to the engine; and a one-way clutch connected to the torque output section, wherein the torsion damper and the one-way clutch may be arranged within the internal chamber.

[0012] In one embodiment of the present invention, the system includes a pilot hub rotatably fixed to the engine, a transmission hub rotatably fixed to the transmission, and a cover portion rotatably fixed to the transmission hub, wherein the torque input portion is rotatably fixed to the pilot hub, and the pilot hub, the transmission hub, and the cover portion form the internal chamber.

[0013] In another embodiment of the present invention, the one-way clutch may include a drive carrier rotatably fixed to the torque output portion of the torsion damper, an inner race coupled to the drive carrier, an outer race coupled to the inner circumferential surface of the cover portion, and a clutch element provided between the inner race and the outer race, which rotatably supports the outer race in one direction relative to the inner race.

[0014] In yet another embodiment of the present invention, the outer race and the clutch element may be fixed to the cover portion by a retainer that is coupled to the cover portion.

[0015] In yet another embodiment of the present invention, the torque input section includes a damper drive plate whose radially inward side is rotatably fixed to the pilot hub, the torque output section includes a cover plate rotatably fixed to the drive carrier, the torsion damper includes a plurality of spring members positioned radially outward from the damper drive plate and elastically supported circumferentially by the damper drive plate, and the cover plate may be elastically supported circumferentially by the spring members.

[0016] In yet another embodiment of the present invention, one end of the cover portion may be rotatably fixed to the transmission hub, and the other end of the cover portion may be rotatably connected to the pilot hub.

[0017] In another embodiment of the present invention, a sealing member may be attached between the other end of the cover portion and the pilot hub.

[0018] In yet another embodiment of the present invention, a bearing may be interposed between the clutch hub and the transmission hub, and the internal chamber may be fluidly connected to the transmission via the bearing.

[0019] In another embodiment of the present invention, the rotor of the motor may be mounted radially outward from the cover portion.

[0020] In yet another embodiment of the present invention, the one-way clutch may transmit the rotational power of the engine to the transmission from the point in time when the engine is operating and the rotational speed of the engine begins to exceed the rotational speed of the motor.

[0021] In an embodiment according to the present invention, there is a hybrid drive module for selectively transmitting the rotational power transmitted from an engine and a motor to a transmission, including a torsion damper for attenuating the vibration caused by the rotation of the engine, and a one-way clutch for selectively transmitting the output of the torsion damper to the transmission. The working fluid supplied from the transmission may be used for lubricating the damper.

[0022] In an embodiment of the present invention, when only the motor operates, the one-way clutch transmits the rotational power of the motor to the transmission while rotating freely, and when the engine operates, the rotational power of the engine may be transmitted to the transmission from the time when the rotational speed of the engine starts to rotate faster than the rotational speed of the motor.

Advantages of the Invention

[0023] As described above, according to the hybrid drive module according to the embodiment of the present invention, the structure of the engine clutch is changed to simplify the overall components and coupling structure, and there is an effect of reducing the manufacturing man-hours and manufacturing costs.

[0024] In addition, the present invention also has the effect of free-wheeling the engine clutch according to the operating conditions of the vehicle, transmitting the power of the motor without load on the engine, and performing vehicle running and regenerative braking.

[0025] In addition, according to the present invention, by operating the engine clutch according to the rotational speed of the engine, a separate hydraulic line and actuator can be removed, the design freedom can be improved, and heat generation can be minimized to improve durability and operation controllability.

[0026] In addition, the present invention also has the effect of optimizing the arrangement of the torsion damper mounted together with the engine clutch and connected to the engine clutch inside where the working fluid flows in, and reducing the overall outer diameter and the total axial length.

[0027] Furthermore, by supplying the working fluid to the torsion damper, the present invention can lubricate the torsion damper, thereby improving the performance and durability, and also has the effect of improving the overall commerciality.

Brief Description of the Drawings

[0028] [Figure 1] It is a cross-sectional view of a hybrid drive module according to an embodiment of the present invention viewed axially cut. [Figure 2] It is an enlarged view of part A in FIG. 1.

Modes for Carrying Out the Invention

[0029] Hereinafter, preferred embodiments of the present invention will be described in detail based on the accompanying drawings as follows.

[0030] The present invention is not limited to the embodiments disclosed below, and various modifications can be made and it can be embodied in various different forms. However, this example is provided to complete the disclosure of the present invention and to fully inform those with ordinary knowledge of the scope of the invention.

[0031] Therefore, the present invention is not limited to the embodiments disclosed below, and it should be understood to include not only replacing or adding the configuration of any one embodiment with the configuration of another embodiment, but also all changes, equivalents or alternatives included in the technical idea and scope of the present invention.

[0032] The accompanying drawings are for facilitating the understanding of the embodiments disclosed in this specification, and it should be understood that the technical idea disclosed in this specification is not limited by the accompanying drawings and includes all changes, equivalents or alternatives included in the idea and technical scope of the present invention.

[0033] To clearly illustrate the present invention, irrelevant parts have been omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

[0034] The dimensions and thicknesses of each component shown in the drawings are arbitrary for illustrative purposes, and the present invention is not necessarily limited to those shown in the drawings. The thicknesses are shown enlarged to clearly illustrate various parts and areas.

[0035] While the size and thickness of components in drawings may be exaggerated or reduced for ease of understanding, this should not restrict the scope of protection of the present invention.

[0036] The terms used herein are solely for the purpose of describing specific examples or embodiments and are not intended to limit the invention. A singular expression includes plural expressions unless the context clearly indicates otherwise.

[0037] In this specification, terms such as “including” and “consisting of” are intended to specify the presence of features, figures, stages, operations, components, parts, or combinations thereof as described in the specification. In other words, it should be understood that terms such as “including” and “consisting of” in the specification do not preclude the presence or possibility of adding one or more other features, figures, stages, operations, components, parts, or combinations thereof.

[0038] Terms including ordinal numbers such as "first," "second," etc., may be used to describe various components, but such components are not limited by such terms. These terms are used solely for the purpose of distinguishing one component from another.

[0039] When one component is described as being "linked" or "connected" to another component, it should be understood that it may be directly linked to or connected to the other component, but other components may also exist between them.

[0040] On the other hand, if one component is described as being "directly connected" to another component, it should be understood that there are no other components in between.

[0041] When one component is described as being "above" or "below" another component, it should be understood that this does not only mean that it is positioned directly above the other component, but that other components may exist in between.

[0042] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as those generally understood by a person skilled in the art to which this invention pertains.

[0043] Terms that are defined in commonly used dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and not in an ideal or overly formal sense unless explicitly defined in this application.

[0044] For convenience, in this specification, direction is defined as follows:

[0045] The front-rear or axial direction is the direction aligned with the axis of rotation. The front (front side) refers to the direction toward the power source, for example, toward the engine, while the rear (rear side) refers to the other direction, for example, toward the transmission. Therefore, the front surface is the side of the surface that looks forward, and the rear surface is the side of the surface that looks backward.

[0046] The radial direction or radial direction refers to the direction toward or toward the center along a straight line passing through the center of the axis of rotation on a plane perpendicular to the axis of rotation. The direction toward the center in the radial direction is called the centrifugal direction, and the direction toward the center is called the centripetal direction.

[0047] The circumferential direction refers to the direction surrounding the circumference of the rotation axis. The outer circumference refers to the outer circumference, and the inner circumference refers to the inner circumference. Therefore, the outer surface refers to the surface facing away from the rotation axis, and the inner surface refers to the surface facing the rotation axis.

[0048] A circumferential side surface refers to a surface whose normal vector points approximately in the circumferential direction.

[0049] Furthermore, terms such as "...unit," "...means," "...part," and "...component" used in the specification refer to a comprehensive structural unit that performs at least one function or operation.

[0050] Figure 1 is a cross-sectional view of a hybrid drive module according to one embodiment of the present invention, viewed after being cut in the axial direction, and Figure 2 is an enlarged view of portion A in Figure 1.

[0051] Figure 1 is a half-sectional view illustrating an embodiment of the present invention, showing a hybrid drive module 100 according to an embodiment of the present invention.

[0052] Referring to Figure 1, the hybrid drive module 100 according to one embodiment of the present invention is for selectively transmitting rotational power transmitted from the engine 2 and the motor 6 to the transmission 4, and is positioned between the engine 2 and the transmission 4.

[0053] The motor 6, as applied to general electric vehicles, is composed of a rotor R and a stator S, and can perform motor and generator functions simultaneously.

[0054] Here, the hybrid drive module 100 according to an embodiment of the present invention may include a drive plate 110, a pilot hub 120, a cover portion 125, a torsion damper 140, a transmission hub 152, and a one-way clutch 160.

[0055] In this case, the pilot hub 120, the cover portion 125, and the transmission hub 152 may be coupled to each other to form an internal chamber, and the torsion damper 140 and the one-way clutch 160 may be arranged within this internal chamber.

[0056] The internal chamber may be provided with an inlet and an outlet for the working fluid. In this embodiment, the outlet may be formed in the transmission hub 152, and the inlet may be formed between the pilot hub 120 and the transmission hub. A detailed explanation follows below.

[0057] First, the drive plate 110 is connected to the engine 2, and the rotational power of the engine 2 is input to it.

[0058] The pilot hub 120 is positioned at the center of rotation radially inward of the drive plate 110 and is attached to the drive plate 110 via bolts.

[0059] In this embodiment, one end of the cover portion 125 can be rotatably fixed to the transmission hub 152, and the other end of the cover portion 125 may be rotatably connected to the pilot hub 120.

[0060] Similar to the illustrated embodiment, the cover portion 125 may include a damper cover 130 located on the torsion damper 140 side and a clutch cover 150 located on the one-way clutch 160 side.

[0061] In such a case, one end of the clutch cover 150 may be rotatably fixed to the transmission hub 152.

[0062] Furthermore, one end of the damper cover 130 may be rotatably fixed to the other end of the clutch cover 150. The other end of the damper cover 130 may be rotatably attached to the pilot hub 120 on the engine 2 side.

[0063] In this case, a sealing member 132 may be attached to the inner circumferential surface of the damper cover 130 to seal the space between the damper cover 130 and the pilot hub 120.

[0064] The sealing member 132 can prevent the internal working fluid from leaking to the outside between the pilot hub 120 and the damper cover 130.

[0065] On the other hand, the torsion damper 140 is positioned on the engine 2 side inside the interconnected damper cover 130 and clutch cover 150, and is fixed to the pilot hub 120 so as to rotate together with the pilot hub 120.

[0066] Here, the torsion damper 140 may be equipped with a torque input section that is rotationally fixed to the engine 2 and a torque output section that outputs rotational power.

[0067] Such a torsion damper 140 absorbs the torsional force acting in the rotational direction of the shaft due to the rotational power of the engine 2 transmitted to the torque input section via the drive plate 110, thereby damping vibrations.

[0068] Here, the torsion damper 140 may include a damper drive plate 141, a spring member 142, a first cover plate 143, and a second cover plate 144.

[0069] First, the damper drive plate 141 is coupled to the pilot hub 120. The torque input portion may be rotatably fixed to the pilot hub 120. In other words, the torque input portion of the torsion damper 140 may be the damper drive plate 141.

[0070] As a result, the damper drive plate 141 can receive torsional force and vibrations acting in the direction of rotation of the shaft from the rotational power of the engine 2.

[0071] The spring members 142 are arranged in a number in the circumferential direction with respect to the center of rotation and are elastically supported by the damper drive plate 141. Such springs 32 may be formed from compression coil springs.

[0072] In this embodiment, the first cover plate 143 and the second cover plate 144 are arranged to enclose the spring member 142, and can elastically support the spring member 142.

[0073] Here, the first cover plate 143 and the second cover plate 144 may be arranged facing each other. Also, the first cover plate 143 may serve as the torque output section of the torsion damper 140.

[0074] In other words, the driving force transmitted to the damper drive plate 141 can be transmitted to the first and second cover plates 143 and 144 via the spring 24. In this process, the spring member 142 can absorb vibrations and shocks in the rotational direction.

[0075] The torsion damper 140 configured in this way is positioned inside the damper cover 130 on the engine 2 side with respect to the axial direction, and is coupled to the pilot hub 120, and can efficiently absorb torsional forces and vibrations acting in the direction of rotation of the shaft from the rotational power of the engine 2.

[0076] Such a torsion damper 140 is lubricated by the working fluid flowing into the interconnected damper cover 130 and clutch cover 150, thereby reducing friction due to contact between each component, reducing the fatigue of the spring member 142, and improving overall durability.

[0077] On the other hand, the rotor R can be fixed to the damper cover 130 or the clutch cover 150 by fixing means attached to the radially outer side of the damper cover 130 or the clutch cover 150. In one embodiment of the present invention, the fixing means consists of a fixing ring 151 attached to the clutch cover 150.

[0078] As a result, the rotor R is fixed by the fixing ring 151 with its inner surface firmly attached to the outer surface of the outer surface on the radially outer side of the assembled damper cover 130 and clutch cover 150.

[0079] Here, the stator S is positioned radially outward from the rotor R.

[0080] On the other hand, although this embodiment describes the fixing ring 151 being attached to the clutch cover 150 as one embodiment, it is not limited to this, and the fixing ring 151 may also be attached to the outer circumferential surface of the damper cover 130.

[0081] In this embodiment, the transmission hub 152 is rotatably connected to the pilot hub 120. The inner circumferential surface of the clutch cover 150 may be fixed to the transmission hub 152 by welding or the like.

[0082] On the other hand, referring to Figure 1, a bearing 8 is interposed between the pilot hub 120 and the transmission hub 152.

[0083] Here, one end of the bearing 8, facing the engine 2 side with respect to the axial direction, is supported by a first stepped groove 122 formed on the inner circumferential surface of the pilot hub 120 on the radially inward side.

[0084] Such a bearing 8 can have its other end, which faces the transmission 2 side with respect to the axial direction, supported by a second stepped groove 154 formed on the outer circumferential surface of the transmission hub 152 on the radially inward side.

[0085] As a result, the bearing 8 is prevented from detaching axially from the pilot hub 120 and the transmission hub 152 by the first and second stepped grooves 122 and 154, and the transmission hub 152 can be stably and freely supported relative to the pilot hub 120.

[0086] Furthermore, the internal chamber may be connected to the transmission 4 via the bearing 8 so as to be able to communicate fluidly.

[0087] In this embodiment, as shown in Figures 1 and 2, the one-way clutch 160 is located on the transmission 4 side inside the interconnected damper cover 130 and clutch cover 150 and is connected to the torque output section of the torsion damper 140.

[0088] Such a one-way clutch 160 can selectively transmit the rotational power of the engine 2 to the transmission hub 152 via the clutch cover 150 by directly connecting the drive plate 110 to the clutch cover 150.

[0089] The one-way clutch 160 can transmit the rotational power of the engine 2 to the transmission 4 when the engine 2 is operating.

[0090] Here, the one-way clutch 160 can transmit the rotational power of the engine 2 to the transmission 4 from the point in time when the rotational speed of the engine 2 starts to exceed the rotational speed of the motor 6 when the engine 2 is operating.

[0091] Furthermore, when only the motor 6 is operating, the one-way clutch 160 can transmit the rotational power of the motor 6 to the transmission 4 while rotating freely. The one-way clutch 160 configured in this way may also be a one-way clutch.

[0092] In one embodiment of the present invention, the one-way clutch 160 may include a drive carrier 162, an inner race 163, an outer race 164, and a clutch element 165.

[0093] First, the drive carrier 162 may be rotatably fixed to the first cover plate 143, which is the torque output section of the torsion damper 140. Here, the drive carrier 162 may be fixedly coupled to the torsion damper 140 by riveting.

[0094] The inner race 163 may be coupled to the outer circumferential surface of the drive carrier 162.

[0095] Here, the inner race 163 may be fixedly coupled to the drive carrier 162 by a snap ring 167 attached to the outer circumferential surface of the drive carrier 162.

[0096] In this embodiment, the outer race 164 may be positioned radially outward from the inner race 163, or it may be coupled to the inner circumferential surface of the clutch cover 150.

[0097] In other words, the outer race 164 may be fixed to the inner circumferential surface of the clutch cover 150 on the transmission 4 side with respect to the axial direction.

[0098] Furthermore, the clutch element 165 may be provided between the inner race 163 and the outer race 164. Such a clutch element 165 can support the outer race 164 so as to be rotatable in one direction relative to the inner race 160.

[0099] Here, the outer race 164 and the clutch element 165 may be fixed to the inner circumferential surface of the clutch cover 150 by a retainer 166 which is coupled to the clutch cover 150.

[0100] In other words, the retainer 166 can support and fix both the outer race 164 and the clutch element 165 together with the clutch cover 150 on both axial sides. Such a retainer 166 may be fixed to the clutch cover 150 by a snap ring 167 attached to the inner circumferential surface of the clutch cover 150.

[0101] In the one-way clutch 160 configured in this way, when the rotational power of the engine 2 is transmitted by the drive carrier 162, the inner race 163 rotates together with the outer race 164 in the same direction, and can transmit the rotational power of the engine 2 to the transmission 4 via the transmission hub 152.

[0102] In other words, when only the motor is operating, the one-way clutch 160 allows the outer race 164 to rotate freely relative to the inner race 163 by the clutch element 165, thereby transmitting the rotational power of the motor 6 to the transmission 4.

[0103] On the other hand, when the engine 2 is operating, the one-way clutch 160 can directly transmit the rotational power of the engine 2 to the transmission 4 from the point when the rotational speed of the engine 2 starts to exceed the rotational speed of the motor, after the inner race 163 and the outer race 164 have rotated together in the same direction by the clutch element 165.

[0104] On the other hand, in the hybrid drive module 100 according to an embodiment of the present invention, the working fluid passes through the bearing 8 between the pilot hub 120 and the transmission hub 152, flows through the internal chamber formed by the interconnected damper cover 130 and the clutch cover 150, and then circulates to the transmission 4 via the outlet 152a formed in the transmission hub 152.

[0105] Furthermore, the working fluid inside the internal chamber can be discharged from the internal chamber to the bearing 8 side in accordance with the internal pressure adjustment.

[0106] In other words, the working fluid that flows into the internal chamber formed by the damper cover 130 and the clutch cover 150 is supplied to the torsion damper 140 and the one-way clutch 160, thereby lubricating the torsion damper 140 and cooling the one-way clutch 160, and also contributes to the lubrication of the bearing 8 by flowing through it.

[0107] On the other hand, although not shown in the figure, the transmission hub 152 may be connected to the transmission 4 via a torque converter or fluid coupler.

[0108] Therefore, by applying the hybrid drive module 100 according to one embodiment of the present invention configured as described above, the structure of the one-way clutch 160 can be modified to simplify the overall components and coupling structure, thereby reducing manufacturing man-hours and production costs.

[0109] Furthermore, the hybrid drive module 100 can transmit power from the motor 6 to the engine 2 without load, while the one-way clutch 160 is free-wheeling according to the vehicle's operating conditions, thereby enabling vehicle driving and regenerative braking.

[0110] Furthermore, the present invention allows for the elimination of separate hydraulic lines and actuators by having the one-way clutch 160 operate in accordance with the rotational speed of the engine 2, thereby improving design flexibility, minimizing heat generation, and enhancing durability and operational controllability.

[0111] Furthermore, the present invention allows for the one-way clutch 160 and the torsion damper 140 to be mounted together in an internal chamber formed by the mutually assembled damper cover 130 and the clutch cover 150, optimizing the arrangement of the torsion damper 140 connected to the one-way clutch 160, thereby reducing the overall outer diameter and axial length.

[0112] Furthermore, the present invention provides lubrication to the torsion damper 140 located in an internal chamber by supplying working fluid to the torsion damper 140, thereby improving its performance and durability, and ultimately enhancing its overall marketability.

[0113] As described above, the present invention has been explained with limited embodiments and drawings, but the present invention is not limited thereto, and of course, various modifications and variations are possible within the equivalent scope of the technical concept of the present invention and the claims described below by persons with ordinary skill in the art to which the present invention belongs.

[0114] Furthermore, even if the effects and benefits of the configuration of the present invention are not explicitly described while the embodiments of the present invention are explained earlier, it is natural that the predictable effects of the said configuration should also be recognized.

Claims

1. A hybrid drive module for selectively transmitting rotational power from an engine and an electric motor to a transmission, An internal chamber equipped with an inlet and outlet for the working fluid, A torsion damper having a torque input section and a torque output section that are rotationally fixed to the engine, A one-way clutch connected to the torque output section, A transmission hub that is rotationally fixed to the aforementioned transmission, A cover portion that is rotationally fixed to the aforementioned transmission hub, Includes, The torsion damper and the one-way clutch are arranged within the internal chamber. The one-way clutch includes a drive carrier rotatably fixed to the torque output portion of the torsion damper, an inner race coupled to the drive carrier, an outer race coupled to the inner circumferential surface of the cover portion, and a clutch element provided between the inner race and the outer race, which rotatably supports the outer race in one direction relative to the inner race. The outer race and the clutch element are fixed to the inner circumferential surface of the cover portion by a retainer coupled to the cover portion. The cover portion includes a damper cover located on the torsion damper side and a clutch cover located on the one-way clutch side. A hybrid drive module is provided, wherein the rotor of the motor is mounted on the radially outer side of the cover portion, in a state where it is in contact only with the outer circumferential surface of the damper cover and the outer circumferential surface of the clutch cover within the cover portion.

2. A pilot hub rotatably fixed to the engine, Includes, The torque input unit is rotationally fixed to the pilot hub, The hybrid drive module according to claim 1, wherein the pilot hub, the transmission hub, and the cover portion form the internal chamber.

3. The torque input section includes a damper drive plate whose radially inward side is rotationally fixed to the pilot hub. The torque output unit includes a cover plate that is rotatably fixed to the drive carrier. The torsion damper includes a plurality of spring members arranged radially outward from the damper drive plate and elastically supported circumferentially by the damper drive plate, The hybrid drive module according to claim 1, wherein the cover plate is elastically supported in the circumferential direction by the spring member.

4. One end of the cover portion is rotatably fixed to the transmission hub, The other end of the cover portion is rotatably connected to the pilot hub, as described in claim 2, for the hybrid drive module.

5. The hybrid drive module according to claim 4, wherein a sealing member is attached between the other end of the cover portion and the pilot hub.

6. A bearing is interposed between the pilot hub and the transmission hub. The hybrid drive module according to claim 2, wherein the internal chamber is fluidly connected to the transmission via the bearing.

7. The aforementioned one-way clutch is The hybrid drive module according to claim 1, wherein, when the engine is operating, the rotational power of the engine is transmitted to the transmission from the point in time when the rotational speed of the engine starts to rotate faster than the rotational speed of the motor.

8. A hybrid drive module for selectively transmitting rotational power from an engine and an electric motor to a transmission, A torsion damper for damping vibrations caused by the rotation of the engine, A one-way clutch for selectively transmitting the output of the torsion damper to the transmission, A transmission hub that is rotationally fixed to the aforementioned transmission, A cover portion that is rotationally fixed to the aforementioned transmission hub, Includes, The working fluid supplied from the transmission is used to lubricate the torsion damper. The one-way clutch includes a drive carrier rotatably fixed to the torque output portion of the torsion damper, an inner race coupled to the drive carrier, an outer race coupled to the inner circumferential surface of the cover portion, and a clutch element provided between the inner race and the outer race, which rotatably supports the outer race in one direction relative to the inner race. The outer race and the clutch element are fixed to the inner circumferential surface of the cover portion by a retainer coupled to the cover portion. The cover portion includes a damper cover located on the torsion damper side and a clutch cover located on the one-way clutch side. A hybrid drive module is provided, wherein the rotor of the motor is mounted on the radially outer side of the cover portion, in a state where it is in contact only with the outer circumferential surfaces of the damper cover and the clutch cover within the cover portion.

9. The aforementioned one-way clutch is When only the aforementioned motor is operating, the rotational power of the motor is transmitted to the transmission while it rotates freely. The hybrid drive module according to claim 8, wherein, when the engine is operating, the rotational power of the engine is transmitted to the transmission from the point in time when the rotational speed of the engine starts to exceed the rotational speed of the motor.

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