Clutch and hybrid system

Abstract

A clutch includes an input (11), a first output (12), and a second output (13), the input being a flywheel or housing of the clutch, the first output being a first driven disc of the clutch, the input being drivingly coupled to the first driven disc when the clutch is engaged and the input being drivingly decoupled from the first driven disc when the clutch is disengaged, the second output being a disc-like member and being drivingly coupled to at least one of the housing of the clutch, a cover (14) of the clutch, and a diaphragm spring (16) to enable the second output to rotate with the input. A hybrid powertrain including the clutch is also disclosed.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a powertrain of a hybrid vehicle, and in particular to a dual output clutch and a hybrid powertrain. BACKGROUND

[0002] Figure 1 A partial structure of a possible hybrid powertrain 100 is shown, which includes a K0 clutch 110. The hybrid powertrain 100 also includes a damper 120, a gearbox 130, etc. An input end of the damper 120 is configured to be connected to an engine, an output end (e.g., a flange of the damper 120) of the damper 120 is connected to an input end (e.g., a flywheel of the K0 clutch 110) of the K0 clutch 110, and an output end (e.g., a driven disc 111 of the K0 clutch 110) of the K0 clutch 110 is connected to an input shaft 131 of the gearbox 130. The gearbox 130 can also include an electric machine 132, a rotor of the electric machine 132 can be connected to the input shaft 131 via a rotor support.

[0003] Here, the K0 clutch 110 can be actuated by a hydraulic system, for example, by a modular clutch actuator (MCA).

[0004] The K0 clutch 110 can function as a connecting and disconnecting function, which connects or disconnects the engine and the gearbox 130, and when connected (clutch engaged), the K0 clutch 110 can be used to transmit torque from the engine to the input shaft 131 or the rotor of the electric machine 132. SUMMARY

[0005] It is an object of the present disclosure to provide a dual output clutch and a hybrid powertrain including the same.

[0006] A clutch is provided, which includes an input end, a first output end, and a second output end,

[0007] the input end is a flywheel or a housing of the clutch,

[0008] the first output end is a first driven disc of the clutch, the input end is in driving connection with the first driven disc when the clutch is engaged, and the input end and the first driven disc are disconnected from the driving connection when the clutch is disengaged,

[0009] the second output end is a disc-shaped member, the disc-shaped member is in driving connection with at least one of a housing, a clutch cover, and a diaphragm spring of the clutch, such that the second output end is rotatable with the input end.

[0010] In at least one embodiment, the second output is drivingly coupled to the clutch cover and / or the diaphragm spring, the diaphragm spring being disposed outside of the clutch cover.

[0011] In at least one embodiment, the clutch includes a pressure plate for pressing the first driven plate against the input when the clutch is engaged, the pressure plate including a plurality of protrusions dispersed along a circumferential direction of the clutch,

[0012] the clutch cover includes a plurality of holes dispersed along the circumferential direction,

[0013] an outer periphery of the diaphragm spring and the plurality of protrusions abut each other via the plurality of holes.

[0014] In at least one embodiment, the second output is a disc-shaped member having a central hole, an outer periphery of the disc-shaped member being connected to the clutch cover and / or the diaphragm spring via a plurality of rivets or bolts dispersed along a circumferential direction of the clutch, the outer periphery of the disc-shaped member being located inside of the diaphragm spring.

[0015] In at least one embodiment, the clutch is a decoupling clutch for a hybrid powertrain.

[0016] A hybrid powertrain is provided, including a clutch according to the present disclosure.

[0017] In at least one embodiment, the hybrid powertrain further includes:

[0018] an engine, an input of the clutch being connected to an output member of the engine;

[0019] a transmission, the transmission including a first input shaft, a first output of the clutch being drivingly coupled to the first input shaft;

[0020] a second input shaft, a second output of the clutch being drivingly coupled to the second input shaft.

[0021] In at least one embodiment, the transmission further includes a first electric machine, the first input shaft being drivingly coupled to a rotor of the first electric machine.

[0022] In at least one embodiment, the hybrid powertrain further includes an integrated starter and generator, the second input shaft being drivingly coupled to a rotor of the integrated starter and generator,

[0023] In an axial direction of the clutch, the integrated starter and generator is located between the engine and the transmission.

[0024] In at least one embodiment, the second input shaft is a hollow shaft that is radially outside of the first input shaft. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a partial structural schematic view of one possible hybrid system.

[0026] Figure 2 is a schematic structural diagram of a hybrid system according to one embodiment of the present disclosure.

[0027] Figure 3 is a partial structural schematic view of one possible hybrid system.

[0028] Reference numerals

[0029] 100 Hybrid system

[0030] 110 Clutch

[0031] 111 Driven plate

[0032] 120 Damper

[0033] 130 Transmission

[0034] 131 Input shaft

[0035] 132 Electric machine

[0036] 1 Hybrid system

[0037] 10 Clutch

[0038] 11 Input end

[0039] 12 First output end

[0040] 13 Second output end

[0041] 14 Clutch cover

[0042] 141 Hole

[0043] 15 Press plate

[0044] 151 Projection

[0045] 16 Diaphragm spring

[0046] 17 Support ring

[0047] 18 Rivet

[0048] 19 Release bearing

[0049] 20 Transmission

[0050] 21 First Input Axis

[0051] 22 Second Input Axis

[0052] 23 bearings

[0053] 30 Shock absorber

[0054] 31. Primary Quality

[0055] 32 Flange

[0056] ICE engine

[0057] Axial

[0058] R radial Detailed Implementation

[0059] Exemplary embodiments of this disclosure are described below with reference to the accompanying drawings.

[0060] In one aspect of this disclosure, it is desirable to develop a hybrid power system with multiple motors. As an example, the concept of using a P2 motor (or a P3 motor or a P2.5 motor) plus a P1 motor can be used. An ISG (Integrated Starter and Generator) can be a typical example of such a P1 motor, which can not only act as a starter for the engine but also as a generator to charge the battery.

[0061] Here, it is desirable for the K0 clutch to have two outputs, which can be connected to different input components, for example, to two motors respectively. One of the outputs can be connected to the aforementioned ISG (P1 motor).

[0062] Based on the aforementioned needs and ideas, the inventors have completed this disclosure. Of course, the purpose of this disclosure is not limited to meeting the aforementioned needs or realizing the aforementioned ideas; rather, those skilled in the art can apply all or part of this disclosure in various possible ways.

[0063] In this disclosure, axial direction A represents the axial direction of the clutch, transmission, or hybrid system, and R represents the radial direction of the clutch, transmission, or hybrid system.

[0064] Figure 2 This is a schematic structural diagram of a hybrid power system according to one embodiment of the present disclosure. Figure 2 As shown, the hybrid power system of this embodiment may include an engine (ICE), a clutch 10, a transmission 20, and an ISG. The clutch 10 may include an input terminal 11 and a first output terminal 12. The transmission 20 may include a first input shaft 21. Multiple gears may be arranged on the first input shaft 21.

[0065] The hybrid system can further include a second input shaft 22, which can be connected to a rotor of the ISG.

[0066] The input end 11 of the clutch 10 can be connected to an output of the engine ICE, for example, via a damper exemplified by a dual mass flywheel to a crankshaft of the engine ICE.

[0067] The input end 11 and the first output end 12 can be connected or disconnected. For example, the input end 11 can be a flywheel or a housing of the clutch 10, and the first output end 12 can be a driven disc of the clutch 10. When the clutch 10 is engaged, the input end 11 and the first output end 12 are drivingly coupled, and when the clutch 10 is disengaged, the driving coupling of the input end 11 and the first output end 12 is released.

[0068] It can be understood that the input end and the output end of the clutch 10 in the present disclosure only represent the input end and the output end of the clutch 10 in at least one working state of the hybrid system, and in other working states, the input end can be used for the output of power or torque, and the output end can be used for the input of power or torque.

[0069] For example, in a state of engine ICE driving or idling charging, the engine ICE can transmit power to the input end 11, and the first output end 12 can transmit power to the first input shaft 21. In a state of starting the engine ICE by the ISG, the torque of the ISG can be transmitted to the engine ICE to start the engine ICE.

[0070] It can be understood that although in Figure 2 , the ISG appears to be on the left side (close to the clutch 10) of the plurality of gears of the transmission 20, i.e., between the clutch 10 and the transmission 20, however, the present disclosure is not limited thereto. In one example, in the axial direction A of the transmission 20, the ISG can be located on the side of the transmission 20 away from the clutch 10.

[0071] Figure 3 A partial structure schematic diagram of a hybrid system 1 according to one embodiment of the present disclosure, the hybrid system 1 including a double-output clutch 10 (sometimes, simply referred to as the clutch 10) according to one embodiment of the present disclosure.

[0072] Referring to Figure 3 , the hybrid system 1 of the embodiment can further include an engine, a transmission 20, a damper 30, and an ISG. The clutch 10 can include an input end 11, a first output end 12, and a second output end 13. The transmission 20 can include a first input shaft 21. The first input shaft 21 can be connected to a plurality of gears (including a planetary gear set) and / or a first motor such as a P2 motor.

[0073] The hybrid power system 1 may also include a second input shaft 22, which may be connected to the rotor of the ISG (integrated starter and generator).

[0074] The input end 11 of the clutch 10 can be connected to the output component of the engine, for example, via a damper 30, exemplified by a dual-mass flywheel, to the crankshaft of the engine.

[0075] The input end 11 and the first output end 12 of the clutch 10 can be connected or disconnected. The input end 11 can be drivenly connected to the second output end 13. For example, the input end 11 can be the flywheel or housing of the clutch 10 (the flywheel can be part of the housing), the first output end 12 can be the first driven plate of the clutch 10, and the second output end 13 can be drivenly connected to the housing or clutch cover 14 and / or diaphragm spring 16 of the clutch 10. The second output end 13 can be a disc-shaped member (sometimes referred to as the second driven plate), which can be a disc-shaped member with a central hole.

[0076] When the clutch 10 is engaged, the input end 11 and the first output end 12 are connected by a transmission. When the clutch 10 is disengaged, the transmission connection between the input end 11 and the first output end 12 is released.

[0077] The input end of the damper 30, such as the primary mass 31, can be connected to the engine, for example, the crankshaft of the engine. The output end of the damper 30, such as the flange 32 of the damper 30, can be connected to the input end 11 of the clutch 10, for example, the flywheel of the clutch 10.

[0078] Clutch 10 can be a disengaging clutch, particularly a K0 clutch. Clutch cover 14 of clutch 10 (which can be part of the clutch 10 housing) is connected to the flywheel. A first driven plate is located between pressure plate 15 and the flywheel. The first driven plate can be pressed between pressure plate 15 and the flywheel by pushing pressure plate 15 towards the flywheel via diaphragm spring 16, thereby drivingly engaging the first driven plate and the flywheel through friction, i.e., enabling them to rotate together. After the pressure on pressure plate 15 is released, the first driven plate can rotate relative to the flywheel. It is understood that clutch 10 can be engaged and disengaged by a clutch actuator including release bearing 19.

[0079] exist Figure 3 In the example shown, the diaphragm spring 16, the clutch cover 14, and the second output end 13 (second driven plate) can be connected together via rivets 18 or bolts, so that the diaphragm spring 16, the clutch cover 14, and the second output end 13 can rotate together.

[0080] In this example, the clutch 10 includes a plurality of rivets 18 distributed along its circumference, which may be rivets for the clutch centering bolt.

[0081] In this example, the diaphragm spring 16 is located outside the clutch cover 14, that is, in the axial direction A, the diaphragm spring 16 is farther away from the first driven plate than the clutch cover 14. The outer periphery of the diaphragm spring 16 can abut against a plurality of protrusions 151 formed on the pressure plate 15 via a plurality of holes 141 formed in the clutch cover 14 in a circumferentially distributed manner. At least in the disengaged state of the clutch 10, the plurality of protrusions 151 can partially extend into the holes 141. The release bearing 19 can abut against the inner periphery (release finger) of the diaphragm spring 16.

[0082] like Figure 3 As shown, the outer periphery of the second output end 13 (second driven plate) can be located axially inside the clutch cover 14, that is, in the axial direction A, the outer periphery of the second output end 13 is closer to the first driven plate than the clutch cover 14. Optionally, in the axial direction A, the outer periphery of the second output end 13 (second driven plate) can also be located between the clutch cover 14 and the diaphragm spring 16.

[0083] The middle portion of the diaphragm spring 16 in the radial direction R can be supported on the clutch cover 14 or the second output end 13 via a wire ring 17.

[0084] In this disclosure, the clutch cover 14 is disposed inside the diaphragm spring 16, that is, in the axial direction A, the clutch cover 14 is closer to the first driven plate than the diaphragm spring 16, and the second output end 13 is fixed to the clutch cover 14 on the axial inner side of the diaphragm spring 16. This not only facilitates the arrangement of the clutch disengagement system including the release bearing 19 and the second input shaft 22, but also reduces the axial dimension of the clutch 10.

[0085] By connecting the diaphragm spring 16, the second output end 13, and the clutch cover 14 together via the same connecting member (e.g., rivet 18), the number of components in the clutch 10 can be reduced, simplifying the structure and installation process of the clutch 10.

[0086] like Figure 3 As shown, the release bearing 19 can be located radially outside the second input shaft 22. The second input shaft 22 can be a hollow shaft sleeved radially outside the first input shaft 21. The first input shaft 21 can be a solid shaft.

[0087] The second output end 13 of the clutch 10 can be driven to the second input shaft 22 via a spline structure, so that the second output end 13 and the second input shaft 22 can rotate together. The first output end 12 of the clutch 10 can be driven to the first input shaft 21 via a spline structure, so that the first output end 12 and the first input shaft 21 can rotate together. The input end 11 of the clutch 10 can be supported on the first input shaft 21 via a bearing 23, so that the input end 11 and the first input shaft 21 can rotate relative to each other.

[0088] The gearbox 20 can comprise a first electric machine, e.g. a P2 electric machine, and the first output 12 can be connected to a rotor of the first electric machine via a first input shaft 21.

[0089] The second input shaft 22 can be connected to a rotor of an ISG. In one example, the ISG can be located outside the gearbox 20. In the axial direction A, the ISG can be located between the engine and the gearbox 20, e.g. between the clutch 10 and the gearbox 20.

[0090] In another example, a dog clutch can be provided inside the gearbox 20, and the second output 13 can be connected to or used with the dog clutch.

[0091] In the example shown, the second output 13 is connected to the engine via a damper 30, and the second output 13 is itself a rigid concept (no damping). However, the present disclosure is not limited thereto, and it can be considered to design the second output 13 as a damped disc, which can reduce the rattle noise, e.g. when using the ISG for idle charging, taking into account other requirements such as NVH (noise, vibration and harshness). Figure 3

[0092] Of course, the present disclosure is not limited to the above-described embodiments, and a person skilled in the art can make various modifications to the above-described embodiments of the present disclosure under the teachings of the present disclosure without departing from the scope of the present disclosure.​

Claims

1. A clutch comprising an input end (11), a first output end (12), and a second output end (13), The input end (11) is the flywheel or housing of the clutch (10). The first output end (12) is the first driven plate of the clutch (10). When the clutch (10) is engaged, the input end (11) is connected to the first driven plate. When the clutch (10) is disengaged, the input end (11) and the first driven plate are disconnected. The second output end (13) is a disc-shaped component, which is drively connected to at least one of the housing, clutch cover (14) and diaphragm spring (16) of the clutch (10), so that the second output end (13) can rotate together with the input end (11). The second output end (13) is a disc-shaped component with a central hole. On the axial inner side of the diaphragm spring (16), the outer periphery of the disc-shaped component is connected to the clutch cover (14) via a plurality of rivets (18) or bolts distributed circumferentially along the clutch (10). The diaphragm spring (16) is disposed on the outside of the clutch cover (14).

2. The clutch according to claim 1, wherein, The clutch (10) includes a pressure plate (15) for pressing the first driven plate against the input end (11) when the clutch (10) is engaged. The pressure plate (15) includes a plurality of protrusions (151) distributed circumferentially along the clutch (10). The clutch cover (14) includes a plurality of holes (141) distributed along the circumference. The outer periphery of the diaphragm spring (16) and the plurality of protrusions (151) abut against each other via the plurality of holes (141).

3. The clutch according to claim 1, wherein, The clutch (10) is a disengagement clutch for a hybrid power system.

4. A hybrid power system comprising a clutch according to any one of claims 1 to 3.

5. The hybrid power system according to claim 4, wherein, The hybrid power system also includes: The engine, the input end (11) of the clutch (10) is connected to the output component of the engine; A gearbox (20) including a first input shaft (21) and a first output end (12) of the clutch being drively connected to the first input shaft (21); The second input shaft (22) is connected to the second output end (13) of the clutch.

6. The hybrid power system according to claim 5, wherein, The gearbox (20) also includes a first motor, and the first input shaft (21) is drive-connected to the rotor of the first motor.

7. The hybrid power system according to claim 5, wherein, The hybrid power system also includes an integrated starter and generator, with the second input shaft (22) driveably coupled to the rotor of the integrated starter and generator. The integrated starter and generator are located between the engine and the gearbox (20) along the axial direction (A) of the clutch (10).

8. The hybrid power system according to claim 5, wherein, The second input shaft (22) is a hollow shaft that is sleeved on the radially outer side of the first input shaft (21).

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