CN106662171B

CN106662171B - Double clutch operating device

Info

Publication number: CN106662171B
Application number: CN201580043017.8A
Authority: CN
Inventors: M·梅罗拉; F·弗里奇
Original assignee: Schaeffler Technologies AG and Co KG
Current assignee: Schaeffler Technologies AG and Co KG
Priority date: 2014-08-11
Filing date: 2015-07-27
Publication date: 2020-02-28
Anticipated expiration: 2035-07-27
Also published as: CN106662171A; EP3180533A1; DE112015003714A5; JP6748068B2; JP2017524110A; WO2016023551A1

Abstract

A dual clutch actuation device (1) for a dual clutch (2) has at least the following components which form a hydraulic system (3): -a dual CSC (4) having a first pressure chamber (5) and a second pressure chamber (6), -a first master cylinder (7) which is fluidically connected to the first pressure chamber, wherein a cylinder housing (8) of the first master cylinder is integrally connected to the housing of the dual CSC, -a second master cylinder (10) which is fluidically connected to the second pressure chamber, wherein the second master cylinder can be connected to the housing (9) of the dual CSC via a releasable connection, -a reservoir (12) for hydraulic fluid (13), wherein the reservoir is fluidically connected to the first pressure chamber via the first master cylinder and to the second pressure chamber via the second master cylinder; wherein the second pressure chamber is vented into the container by means of a second master cylinder in such a way that: the second master cylinder (10) is arranged directly on the housing of the dual CSC and has a self-venting function in a raised first installation position facing away from the vent (29), or the second master cylinder can be arranged at a distance from the housing of the dual CSC in that a hydraulic line (26) is provided for connecting the second master cylinder and the housing of the dual CSC.

Description

Double clutch operating device

The invention relates to a double clutch actuation device for a double clutch, which is provided for hydraulically actuating an engagement device or a disengagement device of the double clutch. Such a double clutch actuation device is known, for example, from the company LuK under the name CSC (Concentric Slave Cylinder) and clutch arrangement. In particular in the case of dual CSCs, two annular pistons are arranged concentrically to one another, which move in an annular cylinder barrel. The first and second pressure chambers associated with the piston are each acted upon by the master cylinder with hydraulic fluid. Due to the usually small available installation space, it is necessary to design the dual clutch actuation device very compactly and to adapt it to the given conditions of the clutch/transmission unit. The double clutch actuation device should have the least possible complexity and at the same time be able to be installed as flexibly as possible for different applications, wherein ventilation of the hydraulic system should be ensured. Furthermore, the double clutch actuation device should be produced as cost-effectively as possible.

Starting from this, the invention is based on the object of at least partially overcoming the disadvantages known from the prior art. This object is achieved by the features of independent claim 1. Advantageous embodiments are the subject matter of the dependent claims.

The invention relates to a double clutch actuation device for a double clutch, comprising at least the following components which form a hydraulic system:

a dual CSC with a first pressure chamber and a second pressure chamber,

a first master cylinder which is fluidically connected to the first pressure chamber, wherein a cylinder housing of the first master cylinder is integrally connected to the housing of the dual CSC.

A second master cylinder which is fluidically connected to a second pressure chamber, wherein the second master cylinder can be connected to the housing of the dual CSC via a releasable connection,

a container for hydraulic fluid, wherein the container is fluidically connected to the first pressure chamber via a first actuator cylinder and to the second pressure chamber via a second actuator cylinder;

wherein the second pressure chamber is vented into the container by means of a second master cylinder in that

The second master cylinder is arranged directly on the housing of the dual CSC and has a self-venting function in the raised installation position facing away from the vent, or

The second master cylinder can be arranged at a distance from the housing of the dual CSC in that a hydraulic line is provided for connecting the second master cylinder and the housing of the dual CSC.

The applicant is aware of an internal, as yet unpublished, prior art in which an actuating device (102013221875.3) for selecting and/or shifting gear stages of a motor vehicle transmission is disclosed. Reference is hereby made in full to this document. The actuating device disclosed there likewise comprises a dual CSC having two master cylinders, which are formed integrally with the housing of the dual CSC. The arrangement of the master cylinders thus determined, however, leads to a complex actuation which requires at least one master cylinder.

The invention is distinguished in particular from the prior art in that only one master cylinder is integrally connected to the housing of the dual CSC. The other master cylinder is arranged in particular on the clutch housing in such a way that: the master cylinder can also be operated directly. This makes it possible to dispense with a deflection device for actuating the master cylinder, which increases the number of components, is prone to malfunction and is cost-effective. The second master cylinder is not arranged in particular in a parallel mounting position relative to the first master cylinder.

In the case of a dual CSC, two annular pistons are arranged in particular concentrically to one another and move within an annular cylinder. The first and second pressure chambers associated with the two pistons are each acted upon by a hydraulic fluid by a master cylinder. Each of the two ring pistons of the dual CSC is connected to a respective release bearing of the dual clutch, so that the respective release bearing is also actuated by the movement of the piston.

With such an arrangement of the (second) master cylinder, which is then predetermined by the position of the interface on the clutch bell, ventilation cannot always be ensured when using the known master cylinders. It is necessary to further ensure the ventilation of the components of the hydraulic system, i.e. the second pressure chamber, the second master cylinder, into the reservoir in order to achieve the desired function of the double clutch actuation device.

The ventilation of the components of the pressure system can be carried out, on the one hand, by means of a special embodiment of the second master cylinder. The second master cylinder has a self-venting function in an elevated mounting position facing away from the vent hole. Such an actuator cylinder is known from DE 102011104370 a1, to which reference is hereby fully made.

Ventilation can on the other hand be ensured by: the second master cylinder is arranged at a distance from the housing of the dual CSC. In this case, the second master cylinder can be positioned in the clutch housing, in particular, independently of the double CSC.

In this case, a mounting position is selected in which the second master cylinder points downward (in the direction of gravity). This makes it possible to use known actuator cylinders (and not according to the particular embodiment of DE 102011104370 a 1). In other words, the ventilation opening present on the secondary side of the second master cylinder is located in the upper part of a pressure chamber which is arranged on the primary side of the second master cylinder and which is connected to the second pressure chamber by means of a hydraulic line, as seen in space. The installation position is improved upward by the air characteristic. The air present inside the master cylinder thus reaches the higher situated ventilation opening via the ventilation channel connecting the primary side to the secondary side and flows through said ventilation opening into the secondary chamber. The self-venting process is necessary for flawless functioning of the double clutch actuation device.

In this arrangement of the second master cylinder at a distance from the housing of the dual CSC, the second master cylinder is connected via a hydraulic line to the second pressure chamber of the dual CSC.

According to a preferred embodiment, the hydraulic line between the second master cylinder and the second pressure chamber of the dual CSC is flexible. The flexibility here means, in particular, that the hydraulic lines can be bent. The hydraulic lines can thus also be used for different installation positions of the second master cylinder, or the assembly process of the second master cylinder and/or of the dual CSC is facilitated.

The at least two CSCs and the first master cylinder are manufactured in particular from plastic. The dual CSC and the first master cylinder are in particular manufactured in one piece, preferably by an injection molding process. The integral production here means that the components are connected to one another in a manner inseparable from one another, i.e. can only be separated destructively.

The second master cylinder is in particular (also) made of plastic.

Furthermore, an actuating device for selecting and/or shifting gear stages and engaging and/or disengaging a double clutch of a motor vehicle is proposed, having at least one clutch cover, in which a double clutch actuating device according to the invention is arranged, wherein a first master cylinder can be actuated as a function of the position of a first drive shaft and a second master cylinder can be actuated as a function of the position of a second drive shaft, wherein an actuating section extending in a radial direction from the drive shaft is attached to the drive shaft in a rotationally fixed manner and, when the drive shaft rotates, the master cylinders are actuated directly by the actuating section.

According to a preferred embodiment of the actuating device, the second master cylinder is arranged directly on the housing of the dual CSC and has a self-venting function by means of an elevated mounting position facing away from the vent opening, and is arranged on the clutch bell in a first mounting position in which the primary side of the second master cylinder, which is fluidically connected to the second pressure chamber, is arranged higher than the secondary side of the second master cylinder, which is fluidically connected to the reservoir. Reference is made in particular to the embodiment in DE 102011104370 a1, in which a master cylinder of this type is proposed for the installation position required here.

According to a preferred embodiment of the actuating device, the second master cylinder is arranged at a distance from the housing of the dual CSC, and the hydraulic line connects the second master cylinder and the housing of the dual CSC. The hydraulic line is in particular flexible.

According to a preferred embodiment, the second master cylinder on the clutch cover is arranged in a second installation position in which the primary side of the second master cylinder, which is fluidically connected to the second pressure chamber, is arranged lower than the secondary side of the second master cylinder, which is fluidically connected to the reservoir.

The invention further relates to a dual clutch actuation device for a dual clutch, comprising at least the following components which form a hydraulic system:

a kidney piston type CSC (Nierenkolbe-CSC) with a first pressure chamber and a second pressure chamber and a housing,

a first master cylinder which is fluidically connected to the first pressure chamber and has a first cylinder housing, and a second master cylinder which is fluidically connected to the second pressure chamber and has a second cylinder housing,

wherein the cylinder housing is integrally connected with the housing and the cylinder housing are composed of plastic.

The applicant is aware of the internal, as yet unpublished, prior art in which an actuating device for selecting and/or shifting gear stages of a motor vehicle transmission is already known from DE 2013108135. Hereby, full reference is made to said document. The actuating device disclosed therein comprises a ring piston dual CSC having two master cylinders, which are integrally connected to the housing of the ring piston dual CSC. However, the arrangement of the master cylinders determined there results in the need for complex actuation of at least one master cylinder. Furthermore, in a ring piston type dual CSC (the two pistons of the CSC are arranged annularly and coaxially and concentrically, i.e. one piston inside the other). The embodiment of a CSC made of plastic cannot be realized there, since the partition wall between the two pressure chambers (between the first and second pistons) would then be implemented with a greater wall thickness, and the required installation space would therefore have to be significantly increased in the radial direction.

The present invention is distinguished in particular from the prior art described above in that the annular piston type double CSC is replaced by a kidney piston type CSC. Such kidney piston type CSCs are known from DE 102009053488 a1, to which reference is hereby fully made. In addition, the invention differs from the prior art in that it is proposed for the first time that the two cylinder housings of the master cylinder are integrally (i.e., in particular integrally/materially) connected to the kidney piston CSC and that the housing of the kidney piston CSC and the cylinder housing connected thereto are (completely) made of plastic. The housing of the kidney piston CSC and the cylinder housing of the master cylinder are in particular produced in one piece, preferably by an injection molding process. The integral production means that the components are connected to one another in a manner that is not detachable, i.e. can only be separated from one another destructively.

The production of the housing of the kidney piston CSC with the integrated master cylinder reduces the production and assembly steps of the dual clutch actuation device and the actuation system that were required up to now. In particular, the fastening of the cylinder housing, which is usually required for providing separately from the kidney piston CSC, is dispensed with. Furthermore, the housings of the master cylinder and the kidney piston CSC no longer have to be oriented and connected to each other. At the same time, it is easier to ensure tightness against leakage of hydraulic fluid in the case of an integrated embodiment than in the case of the assembly of the individual components.

The two master cylinders are arranged in particular on the clutch housing in such a way that: the master cylinder can be directly operated. This makes it possible to dispense with a deflection device for actuating the master cylinder, which increases the number of components, is prone to malfunction and is cost-effective.

The second drive cylinder is not arranged in particular in a parallel mounting position with respect to the first drive cylinder.

In particular, ventilation of the two master cylinders is ensured for this purpose: the two master cylinders are directed downwards (in the direction of gravity). In this way, it is possible to use known master cylinders in which the ventilation opening present on the secondary side of the master cylinder is located, as seen in space, above the pressure chambers which are arranged on the primary side of the master cylinder and are each connected to a respective pressure chamber by means of a fluid chamber. The installation position is improved upward by the air characteristic. The air present inside the master cylinder thereby passes through the ventilation channel connecting the primary side to the secondary side to the higher situated ventilation opening and flows through said ventilation opening to the secondary side of the master cylinder. The secondary side is connected via a hydraulic line to a container for hydraulic liquid, so that air which is transported to the secondary side can be transferred into the container. This self-venting process is necessary for flawless functioning of the double clutch actuation device.

According to a preferred embodiment, the first and second master cylinders are arranged on the housing at a minimum angle of at least 60 degrees to each other.

The first and second master cylinders are arranged on the housing, in particular at a minimum angle of at most 120 degrees to each other.

The master cylinder extends in particular substantially in the radial direction and transversely to the direction of movement of the kidney piston. The smallest angle between the master cylinders extends in the circumferential direction and in a plane in which the radial direction extends and which is arranged transversely to the direction of movement of the kidney piston. The two angles in the circumferential direction are always formed across the master cylinder, wherein the smaller of the two angles is always referred to as the minimum angle.

The invention further relates to an actuating device for selecting and/or shifting gear stages and engaging and/or disengaging a double clutch of a motor vehicle, having at least one clutch cover, in which a double clutch actuating device according to the invention is arranged, wherein the first master cylinder can be actuated as a function of the position of a first drive shaft and the second master cylinder can be actuated as a function of the position of a second drive shaft, wherein an actuating section extending in a radial direction from the drive shaft is attached to the drive shaft in a rotationally fixed manner and, when the drive shaft rotates, the master cylinders are actuated directly via the actuating section.

In other words, no deflection device is required in particular for actuating the master cylinder.

Depending on the particular configuration of the actuating device, the first and second master cylinders are each arranged in a mounting position on the clutch housing, in which the primary side of the first and second master cylinders, which is in each case fluidically connected to the first or second pressure chamber, is arranged lower than the secondary side of the first and second master cylinders, which is fluidically connected to the tank.

At least one actuating section of the first and second master cylinders has, in particular, a slide groove for guiding the piston rod along the slide groove during the actuation of the master cylinders. The actuating section with the link enables a flexible arrangement of the master cylinder in the clutch bell, wherein furthermore a direct actuation of the master cylinder is enabled by the actuating section (i.e. without a deflection device).

The features listed individually in the claims can be combined with one another in any technically meaningful way and can be supplemented by the statements in the description and the details of the drawings, in which further embodiment variants of the invention are shown. The embodiment of the actuation device can be transferred to a dual clutch actuation device and vice versa.

Drawings

The present invention and the technical field are explained in detail below with reference to the accompanying drawings. The drawings show a particularly preferred embodiment, but the invention is not limited thereto. It is to be noted in particular that the drawings and in particular the dimensional proportions shown are purely schematic. Like reference numerals designate like objects. The figures show:

FIG. 1: front view of the prior art handling apparatus;

FIG. 2: FIG. 1 is a side view of the handling apparatus;

FIG. 3: a front view of a first configuration of the steering apparatus;

FIG. 4: a second master cylinder according to DE 102011104370 a 1;

FIG. 5: a front view of a second configuration of the steering apparatus;

FIG. 6: a front view of the manipulation apparatus in a further embodiment;

FIG. 7: the steering apparatus of FIG. 6 with the master cylinder steered;

FIG. 8: fig. 6 is a detail view, wherein the kidney piston CSC is shown in cross-section; and

FIG. 9: an enlarged view of the diagram of fig. 8.

Detailed Description

Fig. 1 shows a front view of a prior art handling device 16. The actuation device 16 is used for selecting and/or shifting gear stages of the motor vehicle 17 and for engaging and/or disengaging the double clutch 2 (not shown). The actuating device 16 comprises a clutch housing 19, in which the dual clutch actuating device 1 is arranged. The two

master cylinders

7 and 10 or the cylinder housings 8 are directly and integrally connected to a CSC4, which is designed as a dual CSC, and extend parallel to one another. The identical mounting position (oriented with respect to gravity) shown here for the two

master cylinders

7, 10 allows a smooth ventilation of the hydraulic system 3. The hydraulic system 3 includes: the dual CSC4, the two

master cylinders

7, 10 connected to it, a reservoir 12 for hydraulic fluid 13 and a hydraulic line 26 between the

master cylinders

7, 10 and the reservoir 12. The first master cylinder 7 is directly actuated by the first drive shaft 18 via an actuating section 22. The second master cylinder 10 is actuated by the second drive shaft 20 by means of an actuating section 22, wherein a deflection device is required between the second master cylinder 10 and the actuating section 22 in order to move a piston rod 27 of the second master cylinder 10.

The reservoir 12, the hydraulic line 26, the first and

second master cylinders

7, 10, the dual CSC4 (in particular with annular pistons) together constitute a hydraulic system 3, which is filled with hydraulic liquid 13.

Fig. 2 shows a side view of the handling device 16 of fig. 1. The piston rod 27 of the first master cylinder 7 is actuated by the first drive shaft 18 via the actuating section 22. The drive shaft 18 extends from the transmission cover 31 into the clutch cover 19. On the drive shaft 18, within the transmission housing 31, a control cartridge (Schaltwalze)32 is arranged. The gear stage of the motor vehicle 17 is set by the control cylinder 32. A first master cylinder 7 is arranged in the clutch housing 19 and acts upon the first pressure chamber 5 with hydraulic fluid 13. The second actuator cylinder 10, which is not shown, is fluidically connected to the second pressure chamber 6. The dual CSC4 is actuated by the

actuating cylinders

7, 10 by means of the first pressure chamber 5 and the second pressure chamber 6.

Fig. 3 shows a front view of a first configuration of the handling device 16. In contrast to the actuating device 16 shown in fig. 1 and 2, the second actuating cylinder 10 is arranged here in the first installation position 14 on the clutch bell 19. In the first installation position 14, the primary side 23 of the second master cylinder 10, which is fluidically connected to the second pressure chamber 6, is arranged higher (relative to the force of gravity 34) than the secondary side 24 of the second master cylinder 10, which is fluidically connected to the reservoir 12. In this first installation position 14, ventilation of the "conventional" master cylinder is not possible. Thus, the following second master cylinder 10 is used here: this second master cylinder has a self-venting function in the raised mounting position (first mounting position 14) facing away from the vent hole 29 (see also fig. 4). The second master cylinder 10 is connected to the housing 9 of the dual CSC4 via a (releasable) connection 11. The arrangement of the second actuator cylinder 10 in the first installation position 14 makes it possible to dispense with a deflection device 30 between the actuating section 22 on the second drive shaft 20 and the piston rod 27 of the second actuator cylinder 10. By integrating the self-ventilation function into the master cylinder 10, it is possible to flexibly mount the master cylinder on the dual CSC 4. By integrating the self-ventilation function into the drive cylinder 10, it is achieved that the drive cylinder is arranged in the lower region, i.e. in the region of the actuating section 22 (eccentric). This enables direct actuation of the master cylinder and avoids deflection points, which represent additional wear points. That is to say, the first and second master cylinders 7, 10 (in contrast to the actuating device in fig. 1) are actuated directly via actuating sections 22 arranged on the

drive shafts

18, 20. The

drive shafts

18, 20 are arranged here substantially parallel to the radial direction 21. For actuating the

actuating cylinders

7, 10, the

drive shafts

18, 20 are in direct connection with an actuating section 22 or eccentric. By arranging the drive shaft in this way, installation space can be saved.

Fig. 4 shows a second master cylinder 10 according to DE 102011104370 a1, to which reference is hereby fully made. The second master cylinder has a self-venting function in an elevated installation position facing away from the ventilation opening 29 (installation position as shown). The second master cylinder 10 comprises a primary side 23 and a secondary side 24. The ventilation opening 29 present on the secondary side 24 is located spatially below a pressure chamber 35 which is arranged on the primary side 23 and is connected to the second pressure chamber 6 by means of the hydraulic line 26. A second master cylinder 10 is attached to the double CSC4 by a connection 11. The air present inside the second master cylinder 10 passes from the primary side 23 into the cavity 36 and from there through the ventilation opening 29, which is arranged in the uppermost position of the cavity 36, to the secondary side 24. In this case, air is brought into the cavity 36 on the return stroke (engagement) of the piston 28, wherein said air, after passing over the primary seal 33, flows together with the hydraulic fluid 13 via the vent opening 29 to the secondary side 24. The secondary side 24 is connected to the container 12 via a hydraulic line 26. This self-venting process is necessary for flawless functioning of the dual clutch actuation device 1.

Fig. 5 shows a front view of the second configuration of the handling device 16. In contrast to the illustration in fig. 3 (like reference numerals indicate like objects), the second master cylinder 10 is arranged at a distance from the dual CSC 4. In other words, the cylinder housing 8 of the second master cylinder 10 is not (directly) connected to the housing 9 of the dual CSC 4. The second master cylinder 10 is in this case fluidically connected to the second pressure chambers 6 of the dual CSC4 via a (flexible) hydraulic line 26. Due to the fact that the pipeline is flexible, different customer requirements or customer installation spaces are met. The second master cylinder 10 is arranged in a second installation position 25, wherein a primary side 23 (with respect to the force of gravity 34) of the second master cylinder, which is fluidically connected to the second pressure chamber 6, is arranged lower than a secondary side 24 of the second master cylinder 10, which is fluidically connected to the container 12. The arrangement of the second master cylinder 10 at a distance from the double CSC4 results in the following possibilities: the second actuator cylinder 10 is arranged in the second mounting position 25 (e.g., the first and

second actuator cylinders

7, 10 in fig. 1), wherein no deflection device 30 is required between the actuating section 22 on the second drive shaft 20 and the piston rod 27 of the second actuator cylinder 10. That is to say, the first and second master cylinders 7, 10 (in contrast to the actuating device in fig. 1) are actuated directly by way of actuating sections 22 arranged on the

drive shafts

18, 20. The master cylinder is directly actuated or controlled by the transmission actuator via the

drive shafts

18, 20. The master cylinder and/or the CSC are in particular completely made of plastic.

Fig. 6 shows a front view of the handling device 16. In contrast to the actuating device 16 shown in fig. 1 and 2, the second actuating cylinder 10 is arranged here in the mounting position 14 on the clutch cover 19, so that here also a direct actuation of the second actuating cylinder 10 is possible. In this case, no deflection device 30 is therefore required between the actuating section 22 on the

drive shafts

18, 20 and the piston rod 27 of the

master cylinders

7, 10. In the installation position 14, the primary side 23 (with respect to the force of gravity 32) of the

master cylinders

7, 10, which is fluidically connected to the pressure chambers 5, 6, is arranged higher than the secondary side 24 of the

master cylinders

7, 10, which is fluidically connected to the tank 12.

The first cylinder housing 8 and the second cylinder housing are integrally (material-bound/one-piece/only destructively separable) connected to a housing 9 of the CSC4, which is designed here in the form of a kidney piston CSC.

Fig. 7 shows the actuating device 16 of fig. 6 with actuated

master cylinders

7, 10. The

drive shafts

18, 20 thus move the actuating section 22: the piston rods 27 of the

master cylinders

7, 10 are actuated. The actuating section 22 of the second master cylinder 10 has a slide groove 42 for guiding the piston rod 27 in the actuating section 22. The second master cylinder can be actuated directly via the connecting link 42.

Fig. 8 shows a detail of fig. 6, wherein the kidney piston type CSC4 is shown in a sectional view, the first and

second master cylinders

7, 10 are arranged at a minimum angle α to each other, the minimum angle α extends in the circumferential direction 40.

Fig. 9 shows an enlarged view of the diagram of fig. 8. The kidney piston type CSC4 is shown in cross-section. Kidney-shaped first and second pressure chambers 5, 6 can be seen. The two first pressure chambers 5 are arranged opposite each other. The two first pressure chambers 5 are connected to each other by a common first fluid chamber 38. The first fluid chamber 38 forms a hydraulic line 26 for the hydraulic fluid 13 in the housing 9 of the kidney piston CSC4 and is connected to the primary side 23 of the first master cylinder 7. In this case, the two first pressure chambers 5 are each attached to the first fluid chamber 38 at a highest point 37 (with respect to the force of gravity 34). This embodiment ensures that ventilation can take place from the first pressure chamber 5, via the first fluid chamber 38, the primary side 23 of the first master cylinder 7, the secondary side 24 of the first master cylinder 7, the hydraulic line 26 into the reservoir 12. The same applies to two second pressure chambers 6 arranged opposite each other. The two second pressure chambers 6 are connected to one another via a common second fluid chamber 39. The second fluid chamber 39 forms a hydraulic line 26 for the hydraulic fluid 13 in the housing 9 of the kidney piston CSC4 and is connected to the primary side 23 of the second master cylinder 10. In this case, the two second pressure chambers 6 are each attached to a second fluid chamber 39 at a highest point 37 (with respect to the force of gravity 34).

List of reference numerals

1 double clutch operating device

2 double clutch

3 hydraulic system

4 CSC

5 first pressure chamber

6 second pressure chamber

7 first driving cylinder

8 cylinder shell

9 casing

10 second master cylinder

11 connecting part

12 container

13 hydraulic fluid

14 first mounting position

15 Plastic

16 handling device

17 Motor vehicle

18 first driving shaft

19 clutch cover

20 second driving shaft

21 radial direction

22 manipulation section

23 primary side

24 secondary side

25 second mounting position

26 hydraulic circuit

27 piston rod

28 piston

29 air vent

30 deflection device

31 speed changer cover

32 control cylinder

33 Primary seal

34 gravity force

35 pressure chamber

36 cavity

37 highest point

38 first fluid chamber

39 second fluid chamber

40 circumferential direction

41 direction of motion

42 chute

α minimum angle

Claims

1. A dual clutch actuation device (1) for a dual clutch (2) has at least the following components which form a hydraulic system (3):

a dual concentric slave cylinder (4) with a first pressure chamber (5) and a second pressure chamber (6),

a first master cylinder (7) which is fluidically connected to the first pressure chamber (5), wherein a cylinder housing (8) of the first master cylinder (7) is integrally connected to a housing (9) of the dual concentric slave cylinder (4),

a second master cylinder (10) which is fluidically connected to the second pressure chamber (6), wherein the second master cylinder (10) can be connected to the housing (9) of the dual concentric slave cylinder (4) via a releasable connection (11),

a reservoir (12) for hydraulic fluid (13), wherein the reservoir (12) is fluidically connected to the first pressure chamber (5) via the first master cylinder (7) and to the second pressure chamber (6) via the second master cylinder (10);

wherein the second pressure chamber (6) is ventilated into the container (12) by means of the second actuating cylinder (7) in that

The second master cylinder (10) is arranged directly on the housing (9) of the dual concentric slave cylinder (4) and has a self-venting function in an elevated installation position facing away from the vent (29), the primary side (23) of the second master cylinder (10) fluidically connected to the second pressure chamber (10) being arranged higher than the secondary side (24) of the second master cylinder (10) fluidically connected to the container (12), or

The second master cylinder (10) can be arranged at a distance from the housing (9) of the dual concentric slave cylinder (4), the housing of the second master cylinder not being directly connected to the housing of the concentric slave cylinder, in that a hydraulic line (26) is provided for connecting the second master cylinder (10) to the housing (9) of the dual concentric slave cylinder (4).

2. The dual clutch actuation device (1) according to claim 1, wherein the hydraulic line (26) is flexible.

3. The dual clutch actuation device (1) as claimed in claim 1, wherein at least the dual concentric slave cylinders (4) and the first master cylinder (7) are manufactured from plastic (15).

4. The double clutch actuation device (1) according to one of the preceding claims, wherein the second master cylinder (10) is manufactured from plastic (15).

5. An actuating device (16) for selecting and/or switching gear stages and engaging and/or disengaging a double clutch (2) of a motor vehicle (17), having at least one clutch cover (19), in which a double clutch actuation device (1) according to one of the preceding claims is arranged, wherein the first master cylinder (7) can be actuated depending on the position of a first drive shaft (18), and the second master cylinder (10) can be actuated depending on the position of the second drive shaft (20), wherein a handling section (22) extending in a radial direction (21) from the drive shaft (18, 20) is attached to the drive shaft (18, 20) in a rotationally fixed manner, and when the drive shaft (18, 20) rotates, the master cylinder (7, 10) is actuated directly by the actuating section (22).

6. Operating device (16) according to claim 5, wherein the second master cylinder (10) is arranged directly on the housing (9) of the dual concentric slave cylinder (4) and has a self-venting function in an elevated mounting position facing away from a vent (13), and is arranged on the clutch cover (19) in a first mounting position (14) in which a primary side (23) of the second master cylinder (10) which is fluidically connected to the second pressure chamber (10) is arranged higher than a secondary side (24) of the second master cylinder (10) which is fluidically connected to the container (12).

7. Operating device (16) according to claim 5, wherein the second master cylinder (10) is arranged at a distance from the housing (9) of the dual concentric slave cylinder (4) and a hydraulic line (14) connects the second master cylinder (10) and the housing (9) of the dual concentric slave cylinder (4).

8. Operating device (16) according to claim 7, wherein a second actuating cylinder (10) is arranged on the clutch cover (19) in a second installation position (25) in which a primary side (23) of the second actuating cylinder (10) which is fluidically connected to the second pressure chamber (6) is arranged lower than a secondary side (24) of the second actuating cylinder (10) which is fluidically connected to the container (12).