WO2022087893A1

WO2022087893A1 - Clutch and hybrid system

Info

Publication number: WO2022087893A1
Application number: PCT/CN2020/124420
Authority: WO
Inventors: 范意中
Original assignee: 舍弗勒技术股份两合公司; 范意中
Priority date: 2020-10-28
Filing date: 2020-10-28
Publication date: 2022-05-05
Also published as: CN116249843A

Abstract

A clutch, comprising an input end (11), a first output end (12), and a second output end (13). The input end is a flywheel or housing of the clutch, the first output end is a first driven disc of the clutch, when the clutch is engaged, the input end is transmittingly connected to the first driven disc, and when the clutch is released, the input end is disconnected from the first driven disc; and the second output end is a disc-like member and transmittingly connected to at least one of the housing, a clutch cover (14), and a diaphragm spring (16) of the clutch, so that the second output end can rotate together with the input end. A hybrid system comprising the clutch is also disclosed.

Description

Clutches and Hybrid Systems

technical field

The present disclosure relates to hybrid vehicle powertrains, and in particular, to a dual output clutch and hybrid powertrain.

Background technique

FIG. 1 shows a partial structure of a possible hybrid system 100 that includes a K0 clutch 110 . The hybrid system 100 further includes a shock absorber 120, a gearbox 130 and the like. The input end of the shock absorber 120 is used to connect to the engine, and the output end of the shock absorber 120 (eg, the flange of the shock absorber 120 ) is connected to the input end of the K0 clutch 110 (eg, the flywheel of the K0 clutch 110 ), K0 The output end of the clutch 110 (eg, the driven plate 111 of the K0 clutch 110 ) is connected to the input shaft 131 of the gearbox 130 . The gearbox 130 may also include a motor 132 whose rotor may be connected to the input shaft 131 via a rotor bracket.

Here, the K0 clutch 110 may be actuated by a hydraulic system, eg, by a Modular Clutch Actuator (MCA).

The K0 clutch 110 can play a connection and disconnection function, which connects or disconnects the engine and the gearbox 130. When connected (clutch engaged), the K0 clutch 110 can be used for transmission from the engine to the input shaft 131 or the rotor of the motor 132 torque.

SUMMARY OF THE INVENTION

An object of the present disclosure is to provide a dual-output clutch and a hybrid system including the dual-output clutch.

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

The input end is the flywheel or housing of the clutch,

The first output end is the first driven plate of the clutch. When the clutch is engaged, the input end is drivingly coupled with the first driven plate. When the clutch is disengaged, the input end disconnecting the transmission connection from the first driven disc,

The second output is a disc-shaped member drivingly coupled to at least one of a housing of the clutch, a clutch cover and a diaphragm spring such that the second output can communicate with the input. Turn the ends together.

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

In at least one embodiment, the clutch includes a pressure plate for compressing the first driven plate to the input when the clutch is engaged, the pressure plate including along a circumferential direction of the clutch A plurality of convex parts arranged in a dispersed manner,

The clutch cover includes a plurality of holes distributed along the circumferential direction,

The outer peripheral portion of the diaphragm spring and the plurality of convex portions are in contact with each other through the plurality of holes.

In at least one embodiment, the second output end is a disc-shaped member having a central hole, and the outer peripheral portion of the disc-shaped member is connected to the clutch via a plurality of rivets or bolts distributed along the circumference of the clutch. In the clutch cover and/or the diaphragm spring, the outer peripheral portion of the disc-shaped member is located inside the diaphragm spring.

In at least one embodiment, the clutch is a disconnect clutch for a hybrid powertrain.

A hybrid powertrain system is provided that includes a clutch according to the present disclosure.

In at least one embodiment, the hybrid system further includes:

an engine with an input of the clutch connected to an output member of the engine;

a gearbox including a first input shaft to which a first output end of the clutch is drivingly coupled;

A second input shaft to which a second output of the clutch is drivingly coupled.

In at least one embodiment, the gearbox further includes a first electric machine, the first input shaft drivingly coupled to a rotor of the first electric machine.

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

In the axial direction of the clutch, the integrated starter and generator are located between the engine and the transmission.

In at least one embodiment, the second input shaft is a hollow shaft sleeved on the radially outer side of the first input shaft.

Description of drawings

FIG. 1 is a schematic partial structure diagram of a possible hybrid power system.

FIG. 2 is a schematic structural diagram of a hybrid power system according to an embodiment of the present disclosure.

FIG. 3 is a partial structural schematic diagram of a hybrid power system according to an embodiment of the present disclosure.

Description of reference numerals

100 Hybrid System

110 Clutch

111 Driven disc

120 Shock Absorber

130 gearbox

131 Input shaft

132 Motors

1 Hybrid system

10 clutch

11 Inputs

12 The first output

13 Second output terminal

14 Clutch cover

141 holes

15 Platen

151 Convex

16 Diaphragm spring

17 Support ring

18 Rivets

19 Release bearing

20 gearbox

21 The first input shaft

22 Second input shaft

23 Bearings

30 shock absorbers

31 Primary quality

32 flange

ICE engine

A Axial

R Radial

Detailed ways

Exemplary embodiments of the present disclosure are described below with reference to the accompanying drawings.

In one aspect of the present disclosure, it is desirable to develop a hybrid powertrain with multiple electric machines. As an example, the concept of 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 not only acts as a starter for the engine, but also acts as a generator for charging the battery.

Here, it is desired that the K0 clutch has two outputs, which can be connected to different input members, eg, to two electric motors, respectively. One of the outputs can be connected to the above mentioned ISG (P1 motor).

Based on the above needs and assumptions, the inventors have completed the present disclosure. Of course, the purpose of the present disclosure is not limited to meet the above requirements or realize the above ideas, but those skilled in the art can apply all or part of the present disclosure in various possible ways.

In the present disclosure, the axial direction A represents the axial direction of the clutch, the gearbox or the hybrid power system, and R represents the radial direction of the clutch, the gearbox or the hybrid power system.

FIG. 2 is a schematic structural diagram of a hybrid power system according to an embodiment of the present disclosure. As shown in FIG. 2 , 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 end 11 and a first output end 12 . The gearbox 20 may include a first input shaft 21 . A plurality of gears may be provided on the first input shaft 21 .

The hybrid system may also include a second input shaft 22, which may be connected to the rotor of the ISG.

The input 11 of the clutch 10 may be connected to the output of the engine ICE, eg, to the crankshaft of the engine ICE via a shock absorber exemplified by a dual mass flywheel.

The input terminal 11 and the first output terminal 12 can be connected or disconnected. For example, the input end 11 may be the flywheel or the housing of the clutch 10 , and the first output end 12 may be the driven plate of the clutch 10 . When the clutch 10 is engaged, the input end 11 and the first output end 12 are in a transmission connection, and when the clutch 10 is disengaged, the transmission connection between the input end 11 and the first output end 12 is released.

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 may be used for power or torque The output may be used for power or torque input.

For example, when the engine ICE is driven or idle charging, the engine ICE may transmit power to the input end 11 , and the first output end 12 may transmit the power to the first input shaft 21 . In a state where the engine ICE is started by the ISG, the torque of the ISG may be transmitted to the engine ICE to start the engine ICE.

It will be appreciated that although in FIG. 2 the ISG appears to be to the left (near the clutch 10 ) of the gears of the gearbox 20 , ie between the clutch 10 and the gearbox 20 , the present disclosure is not so limited. In one example, in the axial direction A of the gearbox 20 , the ISG may be located on the side of the gearbox 20 away from the clutch 10 .

3 is a partial structural schematic diagram of a hybrid power system 1 according to an embodiment of the present disclosure, the hybrid power system 1 includes a dual-output clutch 10 (sometimes, simply referred to as clutch 10 ) according to an embodiment of the present disclosure.

Referring to FIG. 3 , the hybrid power system 1 of this embodiment may further include an engine, a transmission 20 , a shock absorber 30 and an ISG. The clutch 10 may include an input 11 , a first output 12 and a second output 13 . The gearbox 20 may include a first input shaft 21 . The first input shaft 21 may be connected to a plurality of gears (including planetary gear sets) and/or a first electric machine such as a P2 electric machine.

The hybrid system 1 may further comprise a second input shaft 22 which may be connected to the rotor of the ISG (integrated starter and generator).

The input 11 of the clutch 10 may be connected to an output member of the engine, eg, to the crankshaft of the engine via a shock absorber 30 exemplified by a dual mass flywheel.

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

When the clutch 10 is engaged, the input end 11 and the first output end 12 are in a transmission connection, and when the clutch 10 is disengaged, the transmission connection between the input end 11 and the first output end 12 is released.

An input of the shock absorber 30, such as the primary mass 31, may be connected to an engine, such as a crankshaft of the engine. The output of the damper 30 , eg, the flange 32 of the damper 30 , may be connected to the input 11 of the clutch 10 , eg, the flywheel of the clutch 10 .

The clutch 10 may be a disconnect clutch, in particular a K0 clutch. The clutch cover 14 of the clutch 10 (which may be part of the housing of the clutch 10 ) is connected to the flywheel. The first driven plate is located between the pressure plate 15 and the flywheel. The pressure plate 15 can be pushed toward the flywheel via the diaphragm spring 16 so that the first driven plate is pressed between the pressure plate 15 and the flywheel, so that the first driven plate and the flywheel are driven and coupled via friction, that is, can rotate together. After the pressure of the pressure plate 15 is released, the first driven plate can rotate relative to the flywheel. It will be appreciated that engagement and disengagement of clutch 10 may be driven by a clutch actuator including release bearing 19 .

In the example shown in FIG. 3 , the diaphragm spring 16 , the clutch cover 14 and the second output 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.

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

In this example, the diaphragm spring 16 is located outside the clutch cover 14 , ie in the axial direction A, the diaphragm spring 16 is further away from the first driven disc than the clutch cover 14 . The outer peripheral portion of the diaphragm spring 16 can abut on the plurality of convex portions 151 formed on the pressure plate 15 through the plurality of holes 141 formed in the clutch cover 14 and arranged in a dispersed manner in the circumferential direction. The plurality of protrusions 151 may partially protrude into the hole 141 at least in the disengaged state of the clutch 10 . The release bearing 19 may abut on the inner peripheral portion (separation finger) of the diaphragm spring 16 .

As shown in FIG. 3 , the outer peripheral portion of the second output end 13 (second driven plate) may be located axially inward of the clutch cover 14 , that is, in the axial direction A, the outer peripheral portion of the second output end 13 is larger than the clutch cover. 14 is near the first driven disc. Optionally, in the axial direction A, the outer peripheral portion of the second output end 13 (second driven plate) may also be located between the clutch cover 14 and the diaphragm spring 16 .

An intermediate portion in the radial direction R of the diaphragm spring 16 may be supported by the clutch cover 14 or the second output end 13 via a wire ring 17 .

In the present disclosure, the clutch cover 14 is disposed on the inner side of 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 at the diaphragm spring 16 . The axial inner side of the clutch cover 14 is fixed to the clutch cover 14 , which not only facilitates the arrangement of the clutch release system including the release bearing 19 and the second input shaft 22 , but also reduces the axial dimension of the clutch 10 .

By connecting the diaphragm spring 16 , the second output end 13 and the clutch cover 14 together via the same connecting member (eg, rivet 18 ), the components of the clutch 10 can be reduced, and the structure and installation process of the clutch 10 can be simplified.

As shown in FIG. 3 , the release bearing 19 may be located radially outside the second input shaft 22 . The second input shaft 22 may be a hollow shaft sleeved on the radially outer side of the first input shaft 21 . The first input shaft 21 may be a solid shaft.

The second output end 13 of the clutch 10 may be drivingly coupled to the second input shaft 22 via a spline structure, so that the second output end 13 and the second input shaft 22 may rotate together. The first output end 12 of the clutch 10 can be drive-coupled 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 the bearing 23 , so that the input end 11 and the first input shaft 21 can rotate relative to each other.

The gearbox 20 may comprise a first electric machine, eg a P2 electric machine, the first output 12 may be connected to the rotor of the first electric machine via the first input shaft 21 .

The second input shaft 22 may be connected to the rotor of the ISG. In one example, the ISG may be located outside of the gearbox 20 . In the axial direction A, the ISG may be located between the engine and the transmission 20 , eg, between the clutch 10 and the transmission 20 .

In another example, a dog clutch may be provided inside the gearbox 20 to which the second output 13 may be connected or used.

In the example shown in FIG. 3 , the second output 13 is connected to the engine via a shock absorber 30 , and the second output 13 itself is a rigid concept (without vibration damping). However, the present disclosure is not limited thereto, and considering other requirements such as NVH (Noise, Vibration and Harshness), etc., it may be considered to design the second output terminal 13 as a vibration damping disc, which can reduce, for example, use of ISG idle charging Rattle noise.

Of course, the present disclosure is not limited to the above-mentioned embodiments, and those skilled in the art can make various modifications to the above-mentioned embodiments of the present disclosure under the teaching of the present disclosure, without departing from the scope of the present disclosure.

Claims

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 the housing of the clutch (10),

The first output end (12) is the first driven plate of the clutch (10), and when the clutch (10) is engaged, the input end (11) is drivingly coupled with the first driven plate , when the clutch (10) is disengaged, the input end (11) and the first driven plate are disconnected from the transmission connection,

The second output end (13) is a disc-shaped member that is drivingly coupled to at least one of the housing of the clutch (10), the clutch cover (14) and the diaphragm spring (16), Therefore, the second output end (13) can rotate together with the input end (11).
The clutch of claim 1 wherein,

The second output end (13) is drivingly coupled to the clutch cover (14) and/or the diaphragm spring (16), the diaphragm spring (16) being arranged outside the clutch cover (14) .
The clutch of claim 2 wherein,

The clutch (10) includes a pressure plate (15) for pressing the first driven plate to the input end (11) when the clutch (10) is engaged, the pressure plate (15) including a plurality of protrusions (151) distributed along the circumferential direction of the clutch (10),

The clutch cover (14) includes a plurality of holes (141) distributed along the circumferential direction,

The outer peripheral portion of the diaphragm spring (16) and the plurality of convex portions (151) are in contact with each other through the plurality of holes (141).
The clutch of claim 1 wherein,

The second output end (13) is a disc-shaped member with a central hole, and the outer peripheral portion of the disc-shaped member is provided with a plurality of rivets (18) or bolts distributed along the circumferential direction of the clutch (10). Connected to the clutch cover (14) and/or the diaphragm spring (16), the outer peripheral portion of the disc-shaped member is located inside the diaphragm spring (16).
The clutch of claim 1 wherein,

The clutch (10) is a disconnect clutch for a hybrid system.
A hybrid system comprising a clutch as claimed in any one of claims 1 to 5.
The hybrid system of claim 6, wherein,

The hybrid system further includes:

an engine, the input (11) of the clutch (10) being connected to an output member of the engine;

a gearbox (20) comprising a first input shaft (21) to which a first output end (12) of the clutch is drivingly coupled;

A second input shaft (22) to which the second output (13) of the clutch is drivingly coupled.
The hybrid system of claim 7, wherein,

The gearbox (20) also includes a first electric machine, and the first input shaft (21) is drivingly coupled to a rotor of the first electric machine.
The hybrid system of claim 7, wherein,

The hybrid system also includes an integrated starter and generator, the second input shaft (22) drivingly coupled to a rotor of the integrated starter and generator,

In the axial direction (A) of the clutch (10), the integrated starter and generator are located between the engine and the gearbox (20).
The hybrid system of claim 7, wherein,

The second input shaft (22) is a hollow shaft sleeved on the radially outer side of the first input shaft (21).