Hybrid module and drive assembly for a motor vehicle

Abstract

The invention relates to a hybrid module for coupling an internal combustion engine and a transmission for a motor vehicle, in particular a hybrid motor vehicle, and a drive assembly for a motor vehicle. The hybrid module (1) for coupling an internal combustion engine (6) and a transmission for a motor vehicle, in particular a hybrid motor vehicle, comprises an electric motor (10) with a rotor (11) and also comprises a separating clutch (20) and a housing (70) forming a housing interior space (73). According to the invention, the separating clutch (20) is arranged axially outside a space (14) surrounded by the rotor (11), and the rotor (11) and the separating clutch (10) are arranged in a common housing interior space (74). With the hybrid module and the drive assembly according to the invention, thermal decoupling of the electric motor from the separating clutch can be achieved in a structurally simple manner and with efficient use of the installation space.

Description

Technical Field

[0001] The invention relates to a hybrid module for a motor vehicle, in particular a hybrid motor vehicle, for coupling an internal combustion engine and a transmission, and to a drive assembly for a motor vehicle. Background Art

[0002] Hybrid modules according to the prior art usually include a connection device for mechanically coupling an internal combustion engine, a clutch device by means of which a torque can be transmitted from the internal combustion engine to the hybrid module and by means of which the hybrid module can be separated from the internal combustion engine, and an electric machine for generating a drive torque by means of a rotor. The electric machine enables electric driving, power boosting during operation of the internal combustion engine, and waste heat utilization. The clutch device and its actuation system ensure that the internal combustion engine is coupled to the drive train of the motor vehicle.

[0003] Furthermore, hybrid modules of the so-called triple clutch variant are known, in which, in addition to the clutch device designed as a separating clutch, the hybrid module also comprises a dual clutch device for coupling the hybrid module to two transmission input shafts of the transmission unit. For an axially compact design, it is known that the separating clutch and the dual clutch device are arranged radially and axially in a hollow cylindrical space surrounded by the rotor of the electric machine. However, the friction heat generated in the clutch during the clutch engagement process is also released to the rotor of the electric machine, which can lead to impairment or damage to the electric machine in the long term.

[0004] WO 2019 015 713 A1 discloses a hybrid module for a drive train of a motor vehicle, which has a separation clutch for selectively coupling and decoupling an internal combustion engine with an intermediate shaft that can be driven by an electric motor, and an electric motor for driving the intermediate shaft by an electric motor. The rotor of the electric motor is supported on the housing wall together with the rotor support via rolling bearings, wherein the housing wall is arranged axially between the electric motor and the separation clutch. However, this type of configuration has corresponding installation space requirements. Summary of the invention

[0005] Starting from this, the object of the present invention is to provide a hybrid module and a drive assembly equipped with the hybrid module, which achieve a low thermal load on the electric machine in a structurally simple manner and with efficient use of the installation space.

[0006] This object is achieved by a hybrid module according to the invention in accordance with claim 1. Advantageous embodiments of the hybrid module are described in dependent claims 2 to 9. In addition, a drive assembly for a motor vehicle is provided in accordance with claim 10, which comprises the hybrid module.

[0007] The features of the claims may be combined in all technically meaningful ways, wherein reference may also be made to the explanations from the following description and to the features from the drawings, which contain additional embodiments of the invention.

[0008] The terms “axial” and “radial” within the scope of the present invention always relate to the axis of rotation of the hybrid module.

[0009] The present invention relates to a hybrid module for a motor vehicle, in particular for a hybrid motor vehicle, for coupling an internal combustion engine and a transmission, comprising an electric machine with a rotor and also a separation clutch and a housing forming an interior space of the housing, wherein the rotor radially surrounds a space. The separation clutch is arranged axially outside the space surrounded by the rotor and the rotor and the separation clutch are arranged in a common interior space of the housing. In particular, it can be provided that at least one torque transmission element of the separation clutch is arranged axially outside the space surrounded by the rotor. In this case, such a torque transmission element can have at least one friction lining pair and a compression plate or a section of a corresponding compression plate that can be pressed onto the friction lining pair for the purpose of closing a torque transmission path, so that the separation clutch is configured as a friction clutch.

[0010] Here, the axial inner side of the separating clutch can be configured by a friction lining pair, and the axial outer side of the separating clutch can be configured by a unit consisting of a pressure plate and a counter-pressure plate. The friction lining pair can be supported by a friction lining carrier (configured as an output element of the separating clutch), which is connected to the rotor carrier. The unit consisting of the pressure plate and the counter-pressure plate realizes the input side of the separating clutch and is provided for connecting the hybrid module to the internal combustion engine. Therefore, the axial outer side of the separating clutch can correspond to the input side of the separating clutch, wherein the axial inner side of the separating clutch can correspond to the output side of the separating clutch.

[0011] In particular, it can be provided that the friction lining carrier is directly connected to the rotor carrier as an output element of the separating clutch. In this case, the friction lining carrier can be connected to the rotor carrier via a toothing, wherein the toothing allows a relative movement in the axial direction between the friction lining carrier and the rotor carrier for the purpose of an axial movement of the friction lining carrier for opening and closing the separating clutch.

[0012] Furthermore, the separation clutch can be connected to the internal combustion engine, in particular indirectly, via at least one component, such as a damper unit and / or an intermediate shaft, which is connected to a pressure plate and / or a counterpressure plate as an input element of the separation clutch.

[0013] Here, a separating clutch arranged in the torque transmission path between the electric motor and the internal combustion engine can be operated with slip, so that in a synchronization process for synchronizing the speeds acting on the input side and the output side of the hybrid module, the speeds between the electric motor and the transmission can be matched first, and after this matching, the speeds of the electric motor and the internal combustion engine can be adapted via the separating clutch.

[0014] Therefore, the mass moment of inertia of the internal combustion engine does not have to be synchronized via the clutch device.

[0015] The hybrid module can accordingly be designed as a so-called P2 assembly.

[0016] According to another aspect of the present invention, the hybrid module further comprises a clutch device, in particular a dual clutch device, wherein the clutch device is arranged at least partially radially and at least partially axially inside a space surrounded by the rotor. In particular, the hybrid module can also have a clutch actuation device (preferably configured as a dual piston cylinder unit for actuating the dual clutch device).

[0017] In this case, the respective component clutches of the dual clutch device can be designed as single-disk clutch devices or as multi-disk clutch devices.

[0018] The clutch actuating device can have, for example, at least one pressure tank or a lever transmission for the purpose of transmitting the actuating force from the dual-piston-cylinder unit to the component clutches of the clutch device.

[0019] Advantageously, the separating clutch is arranged at least partially radially outside a space enclosed by the rotor.

[0020] In particular, it can be provided that at least one torque transmission element of the separator clutch is arranged at least partially radially outside a space enclosed by the rotor.

[0021] That is, the radially outer edge of the torque transmission element of the separating clutch can be at a greater distance from the rotation axis of the hybrid module than the radially outer edge of the space enclosed by the rotor (ie, than the radial inside of the rotor). Such a torque transmission element can have at least one friction lining pair.

[0022] According to a further aspect of the invention, the hybrid module comprises a sensor for detecting the angular position of the rotor, which is arranged on the output side of a configuration of the hybrid module for mechanically coupling the hybrid module to the transmission.

[0023] In this case, an element of the sensor for detecting the rotor position (eg a transmitter) can be arranged on a rotor support of the electric machine, and another component of the sensor (eg a receiver) can be arranged on a housing of the hybrid module.

[0024] According to a further specific embodiment, the hybrid module has a separating clutch actuating device for actuating the separating clutch, wherein the separating clutch actuating device is supported at least indirectly on the rotor carrier in the axial and radial direction.

[0025] In particular, the separating clutch actuating device can be designed as a piston-cylinder unit.

[0026] The arrangement of the separating clutch actuating device on the rotor support makes it possible to avoid the arrangement of the separating clutch actuating device on the engine side. Therefore, the separating clutch actuating device is independent of the configuration of the housing wall of the internal combustion engine coupled to the hybrid module according to the present invention. The hybrid module can also include an inlet pipe for guiding the fluid to the separating clutch actuating device, wherein, when the separating clutch actuating device is configured as a piston-cylinder unit, the guided fluid can achieve an axial movement of the piston in the cylinder and thus enable actuation of the separating clutch actuating device. For this purpose, the inlet pipe of the separating clutch actuating device can extend axially in a radial direction between the separating clutch and the electric motor, wherein, however, the inlet pipe is not a component of the housing of the hybrid module, that is, the arrangement of the inlet pipe at a qualified position in the hybrid module achieves that the housing interior is spatially non-separated and thus that the separating clutch and the electric motor are spatially non-separated.

[0027] According to a supplementary specific embodiment, the separating clutch actuating device is supported on a rotary bearing, in particular a rolling bearing, which is supported in the axial direction on the rotor carrier.

[0028] Furthermore, the rotary bearing can also be supported in the radial direction on the rotor support.

[0029] In a structurally advantageous embodiment of the invention, a housing recess of the housing extends radially inwardly in the axial direction relative to the rotor support, wherein a support bearing for supporting the rotor support at least in the radial direction is arranged between the housing recess and the rotor support. In an advantageous configuration, the support bearing also serves to support the rotor support in the axial direction.

[0030] The housing recess can be connected to a housing wall extending essentially in the radial direction, wherein the housing wall delimits the housing interior on the transmission side.

[0031] Radially inside relative to the housing setback, in particular an input element of the transmission unit, in particular at least one transmission input shaft, or an output element of the hybrid module, in particular an output shaft, can be guided for the purpose of connection to the transmission unit.

[0032] Preferably, the clutch device or the clutch actuating device of the dual clutch device used can be arranged on a housing recess, wherein the clutch actuating device can additionally or alternatively also be arranged on a housing wall.

[0033] According to another embodiment, the hybrid module comprises a damper unit, in particular a vibration damper, wherein the damper unit and the separating clutch are arranged at least partially nested in the radial direction. In particular, the damper unit and the separating clutch are directly connected to one another for the purpose of transmitting torque, wherein preferably the input element of the separating clutch is connected to the damper unit.

[0034] In this case, the input element of the separating clutch, which connects the damper unit to the separating clutch, can be a pressure plate or a counterpressure plate of the separating clutch.

[0035] The radial nesting can be achieved by arranging the separating clutch at least partially radially inside the damper unit. In this case, the input side of the hybrid module is preferably realized by the damper unit.

[0036] The hybrid module according to the invention has the advantage that the separating clutch is arranged axially outside the space surrounded by the rotor and therefore no or at least only a small amount of heat is introduced into the electric machine when the separating clutch is actuated.

[0037] Furthermore, the arrangement of the separator clutch and the electric machine in a common housing interior makes it possible to ensure a very short construction of the hybrid module, in particular in the axial direction.

[0038] With the help of the hybrid module according to the invention, when a motor vehicle equipped with the hybrid module according to the invention is started, a coupling process can be carried out via the separating clutch instead of the dual clutch device, so that heat caused by friction is generated outside the space surrounded by the rotor or the rotor carrier and the electric machine as a whole is thermally less loaded.

[0039] The electric machine can be used to accelerate the internal combustion engine during a synchronization process for synchronizing the speeds acting on the hybrid module on the input side and on the output side, in particular during a downshift from fifth gear to second gear or from sixth gear to third gear, and thus to make the speeds acting on both sides of the hybrid module proportional to one another.

[0040] In this case, the separating clutch can be operated with slip. Accordingly, the component clutches of the dual clutch device are less loaded during the synchronization process, thereby reducing the heat input into the electric machine.

[0041] Furthermore, according to the invention, a drive assembly for a motor vehicle is provided, which comprises a hybrid module according to the invention, a drive train (for example an internal combustion engine) and a transmission, wherein the hybrid module is mechanically coupled to the drive train on the input side and to the transmission on the output side.

[0042] The housing of the hybrid module, in particular a housing recess on which the support bearing for the rotor carrier is located, can be mechanically fixedly connected to a housing of a transmission connected to the hybrid module. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Next, the invention described above is explained in detail in the relevant technical context with reference to the accompanying drawings showing preferred configurations. The invention is not limited in any way by the purely schematic drawings, wherein it should be noted that the embodiments shown in the drawings are not limited to the dimensions shown. It shows:

[0044] Figure 1 : A schematic illustration of a section of a drive assembly according to the invention, and

[0045] Figure 2 : A hybrid module according to the invention is shown in a cut-away side view. DETAILED DESCRIPTION

[0046] Figure 1 A schematic illustration of a section of a drive assembly 5 according to the invention is shown.

[0047] The section of the drive assembly 5 includes an internal combustion engine 6 and a hybrid module 1, wherein the hybrid module 1 has a damper unit 60 (configured as a vibration damper), a separating clutch 20, an electric machine 10 and a clutch device 30 (configured as a dual clutch device). The output side 4 of the hybrid module 1 is configured for coupling to a transmission not shown here. The damper unit 60, the separating clutch 20, the electric machine 10 and the clutch device 30 are arranged in series in this order in the torque transmission path between the internal combustion engine 6 and the transmission. The rotor 11 of the electric machine 10 radially surrounds a space 14, in which the clutch device 30 is arranged. Here, the first sub-clutch 40 and the second sub-clutch 50 of the clutch device 30 configured as a dual clutch device are connected to the rotor support 13 supporting the rotor 11. The first sub-clutch 40 is connected to the first transmission input shaft 80 for the purpose of connecting to the transmission, and the second sub-clutch 50 is connected to the second transmission input shaft 81 for the purpose of connecting to the transmission.

[0048] The hybrid module 1 is here accordingly coupled to the internal combustion engine 6 via a damper unit 60 as input side 3 of the hybrid module 1 and to the transmission of the drive assembly 5 via a clutch device 30 as output side 4 of the hybrid module 1 .

[0049] The torque provided by the internal combustion engine 6 is thus transmitted to the separating clutch 20 via the damper unit 60. When the separating clutch 20 is closed, the torque is further transmitted to the electric machine 10 for the purpose of generator operation. The torque is also transmitted to the clutch device 30. The torque can now be transmitted to the transmission via the clutch device 30, depending on the connection of the component clutches 40, 50, either via the first transmission input shaft 80 or via the second transmission input shaft 81. In the opposite direction, the torque acting on the transmission can be transmitted via the transmission input shafts 80, 81 to the clutch device 30 and from there to the electric machine 10 for the purpose of waste heat utilization.

[0050] exist Figure 2 1 shows a hybrid module 1 according to the invention in a sectional side view.

[0051] Here, in Figure 2 The hybrid module 1 shown in FIG. Figure 1 Detailed illustration of a hybrid module 1 of a drive assembly is shown in FIG.

[0052] Here, the damper unit 60 is connected with Figure 1 The input side 3 of the hybrid module 1 is designed equivalently, wherein the input side 61 of the damper unit 60 is provided for connection to the internal combustion engine and the output side 62 of the damper unit 60 is fixedly connected to the input element 25 of the separator clutch 20 .

[0053] The separating clutch 20 comprises a counter-pressure plate 24 and a pressure plate 23, wherein a friction lining pair 22 is arranged between them in the axial direction. The counter-pressure plate 24, the pressure plate 23 and the friction lining pair 22 form a separating clutch torque transmission element 21 of the separating clutch 20. The input element 25 of the separating clutch 20 is realized by the counter-pressure plate 24, and the output element 26 of the separating clutch 20 is realized by the friction lining support 27 that supports the friction lining pair 22. The pressure plate 23 is connected to a separating clutch actuating device 100 (configured as a piston-cylinder unit), wherein the friction lining support 27 extends radially inwardly and is connected to a radially relatively far inner section 16 of the rotor support 13 in a rotationally fixed manner via a toothing 90, wherein the separating clutch actuating device 100 is supported on the section 16 of the rotor support 13 via a rolling bearing 91. An inlet line 102 for the separating clutch actuating device 100 extends in a radial direction from the radial outside to the separating clutch actuating device 100 , which is arranged axially between the separating clutch 20 and the electric machine 10 .

[0054] The separating clutch 20 is arranged partially radially inside the damper unit 60 .

[0055] The stator 12 of the electric machine 10 is fixedly connected to the housing 70 of the hybrid module 1, wherein the rotor 11 of the electric machine 10 is arranged on a rotatable rotor support 13 for the purpose of rotation about the rotation axis 2 of the hybrid module 1. For this purpose, the rotor support 13 is supported radially on a housing recess 71 of the housing 70 by means of a support bearing 92 with a support section 17. In addition, a rotor position sensor 15 for detecting the angular position of the rotor 11 is arranged axially next to the rotor 11 on the side of the hybrid module 1 facing the transmission to be arranged on the hybrid module 1 or on the output side 4 of the hybrid module 1.

[0056] Here, the housing recess 71 extends radially inwardly relative to the clutch device 30 in the axial direction and is connected to a housing wall 72 of the housing 70, wherein the housing wall 72 extends radially from the housing recess 71 on the output side 4 of the hybrid module 1 and delimits a housing interior 73 formed by the housing 70 on the transmission side. The housing interior 73 formed by the housing 70 corresponds to a common housing interior 74 in which the separating clutch 20 and the electric machine 10 are arranged.

[0057] If already in Figure 1 As shown in FIG. 1 , the clutch device 30 (configured as a dual clutch device) or its component clutches 40, 50 are arranged in a space 14 radially surrounded by the rotor 11. In addition, Figure 2It can be seen that the clutch device 30 or the first component clutch 40 and the second component clutch 50 are also arranged axially inside the space 14 surrounded by the rotor 11 on the side of the support section 17 of the rotor support 13 facing the separating clutch 20. Here, the pressure plate 41 and the counter-pressure plate 42 of the first component clutch 40 are connected to the rotor support 13 in the radial direction. In addition, the pressure plate 51 and the counter-pressure plate 52 of the second component clutch 50 are connected to the rotor support 13 in the radial direction. The friction lining 43 of the first component clutch 40 is arranged axially between the counter-pressure plate 42 of the first component clutch 40 and the pressure plate 41 of the first component clutch 40 and is supported by the friction lining support 44 of the first component clutch 40. The friction lining 53 of the second component clutch 50 is arranged axially between the counter-pressure plate 52 of the second component clutch 50 and the pressure plate 51 of the second component clutch 50 and is supported by the friction lining support 54 of the first component clutch 50.

[0058] Here, the first output element 31 of the clutch device 30 configured as the friction lining carrier 44 of the first sub-clutch 40 connects the first sub-clutch 40 to the first transmission input shaft 80, wherein the second output element 32 of the clutch device 30 configured as the friction lining carrier 54 of the second sub-clutch 50 connects the second sub-clutch 50 to the second transmission input shaft 81.

[0059] A first transmission input shaft 80 and a second transmission input shaft 81 extend radially within the housing recess 71 in the direction of the output side 4 of the hybrid module 1 for the purpose of connecting the hybrid module 1 to the transmission.

[0060] A clutch actuating device 101 (designed as a piston-cylinder unit) for actuating the first component clutch 40 and the second component clutch 50 is arranged on the output side 4 of the hybrid module 1 radially against the housing recess 71 and axially against the housing wall 72 .

[0061] The radially inner edge of the separating clutch torque transfer element 21 of the separating clutch 20 has a greater distance from the rotation axis 2 of the hybrid module 1 than the radially outer edge of the pressure plate 41, the corresponding pressure plate 42, the intermediate plate 45 or the friction lining 43 of the first sub-clutch 40 of the clutch device 30 or the radially outer edge of the pressure plate 51, the corresponding pressure plate 52, the intermediate plate 55 or the friction lining 53 of the second sub-clutch 50 of the clutch device 30.

[0062] With the hybrid module according to the invention and a drive assembly equipped with the hybrid module, a low thermal load on the electric machine can be achieved in a structurally simple manner and with efficient use of the installation space.

[0063] Reference numerals list

[0064] 1 Hybrid module

[0065] 2 Axis of rotation

[0066] 3 Input side of the hybrid module

[0067] 4 Output side of the hybrid module

[0068] 5 Drive components

[0069] 6 Internal combustion engine

[0070] 10 Motor

[0071] 11 Rotor

[0072] 12 Stator

[0073] 13 Rotor bracket

[0074] 14 Space surrounded by the rotor

[0075] 15 Rotor position sensor

[0076] 16 Segment of rotor support

[0077] 17 Support section of the rotor support

[0078] 20 Disengagement clutch

[0079] 21 Release clutch torque transfer element

[0080] 22 Friction lining pair

[0081] 23 Extruded Plate

[0082] 24 corresponding extrusion plate

[0083] 25 Input element of the release clutch

[0084] 26 Output element of the release clutch

[0085] 27 Friction lining bracket

[0086] 30 Clutch device

[0087] 31 First output element of the clutch device

[0088] 32 Second output element of the clutch device

[0089] 40 First sub-clutch

[0090] 41 Extrusion plate of the first sub-clutch

[0091] 42 Corresponding squeeze plate of the first sub-clutch

[0092] 43 Friction lining of the first sub-clutch

[0093] 44 Friction lining support for the first sub-clutch

[0094] 50 Second sub-clutch

[0095] 51 Extrusion plate of the second sub-clutch

[0096] 52 Corresponding squeeze plate of the second sub-clutch

[0097] 53 Friction lining of the second clutch

[0098] 54 Friction lining support for the second sub-clutch

[0099] 60 Damper Unit

[0100] 61 Input side of the damper unit

[0101] 62 Output side of the damper unit

[0102] 70 Shell

[0103] 71 Shell indentation

[0104] 72 Shell wall

[0105] 73 Shell internal space

[0106] 74 Common shell interior space

[0107] 80 First transmission input shaft

[0108] 81 Second transmission input shaft

[0109] 90 teeth

[0110] 91 Rolling bearings

[0111] 92 Support bearing

[0112] 100 Clutch release device

[0113] 101 Clutch operating device

[0114] 102 Input tube.

Claims

1. A hybrid module (1) for a hybrid motor vehicle for coupling an internal combustion engine (6) and a transmission, comprising an electric machine (10) with a rotor (11) and also a separating clutch (20) and a housing (70) forming a housing interior (73), wherein: The rotor (11) radially surrounds a space (14), characterized in that the separating clutch (20) is arranged axially outside the space (14) surrounded by the rotor (11), and the rotor (11) and the separating clutch (20) are arranged in a common housing interior space (74), a housing recess (71) of the housing (70) extends radially inwardly in the axial direction relative to a rotor support (13), and a support bearing (92) for supporting the rotor support (13) at least radially is arranged between the housing recess (71) and the rotor support (13), and a separating clutch operating device (100) for operating the separating clutch (20) is provided, wherein the separating clutch operating device (100) is at least indirectly supported on the rotor support (13) in the axial and radial directions.

2. The hybrid power module (1) according to claim 1, characterized in that The hybrid module (1) further comprises a clutch device (30), wherein the clutch device (30) is arranged at least partially in the radial direction and at least partially in the axial direction within a space (14) enclosed by the rotor (11).

3. The hybrid power module (1) according to claim 1, characterized in that The separating clutch (20) is arranged at least partially radially outside a space (14) enclosed by the rotor (11).

4. The hybrid power module (1) according to claim 1, characterized in that The hybrid module (1) comprises a sensor (15) for detecting the angular position of the rotor (11), which is arranged in a configuration of the hybrid module for mechanically coupling the hybrid module (1) to an output side (26) of a transmission.

5. The hybrid power module (1) according to claim 1, characterized in that The separating clutch actuating device (100) is supported on a rotary bearing which is supported in the axial direction on the rotor support (13).

6. The hybrid power module (1) according to claim 5, characterized in that The rotary bearing (91) is also supported in the radial direction on the rotor support (13).

7. The hybrid module (1) according to any one of the preceding claims, characterized in that The hybrid module (1) comprises a damper unit (60), wherein the damper unit (60) and the separating clutch (20) are arranged at least partially nested in the radial direction.

8. A drive assembly (5) for a motor vehicle, comprising a hybrid module (1) according to at least one of claims 1 to 7, a drive assembly, and a transmission, wherein: The hybrid module (1) is mechanically coupled with the drive assembly at an input side (3) and with the transmission at an output side (4).

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