DE102016220059A1 - Slave housing with temperature sensor - Google Patents

Abstract

The invention relates to a slave housing (1), which is prepared for use in a motor vehicle clutch system (2), with at least one prepared for receiving hydraulic fluid cavity (4) in which a hydraulically movable piston (3) is storable, one for delivering arranged by electrical signals temperature sensor (5) is arranged connected to the housing. The invention also relates to a CSC with a slave housing (1) of the type according to the invention, in which at least one piston (3) is movably mounted and a coupling for a coupling system (2) with such a CSC.

Description

The invention relates to a slave housing, which may also be referred to as a slave cylinder, which is prepared for use in a motor vehicle coupling or a motor vehicle coupling system, such as a car, a truck or other commercial vehicle, with at least one prepared for receiving hydraulic fluid cavity in which hydraulically movable piston is storable.

From an earlier patent application with the file number DE 10 2008 057 644 A1 , a similar object is already known. Thus, in that earlier application, a piston cylinder is disclosed which comprises a hollow cylinder body and other components, such as a piston and a piston rod, wherein the piston is slidably mounted in the cylinder body and an end of the piston rod protrudes into the cylinder body, further comprising a connector, wherein one end of the piston is connected in the axial direction with the piston rod through the connecting piece. The end surface of the other end of the piston forms with the inner surface of the cylinder body by enclosing the brake fluid cavity. It comprises the connector a rod-like / rod-shaped part. In particular, it has been pointed out in that earlier patent application that the piston cylinder further comprises a magnet mounted and mounted on the rod-shaped part, the magnet being fixed inside the piston, a sensor located on the cylinder body on the side with the piston rod Sensor when sliding the piston in the cylinder body can receive signals of the magnetic flux of the magnet.

Further, it is disclosed that the magnet is connected to the rod-shaped member by interference fit, and that the connector further comprises a clamping member connected to one end of the rod-shaped member and the clamping member clamps the piston rod, the end face of the piston axially located on one side of the piston rod first recess, the bottom surface of the first recess having a second recess, the clamping part is connected to the first recess by interference fit, and the rod-shaped part is connected to the second recess with interference fit.

The invention is basically applied to actuators / actuators with hydrostatic actuation paths, e.g. used in vehicle transmissions. Hydrostatic actuation paths are characterized in that in the actuated state, the fluid located in the actuation path, such as a fluid, such as a clutch or brake fluid, is completed. Acting on this route temperature changes, this leads to a change in volume and thus to a change in the operating position. If there is no sensor system on a so-called slave side, which can detect this change, it is not possible to react to this unwanted actuation change by the actuator.

Typically, such actuation paths are connected in the fully open position with a so-called Schnüffelbohrung with a reservoir in order to realize a volume compensation can. Common strategies are characterized by the fact that targeted "snooping" are performed. If these snooping operations are not possible, other solutions must be sought, but so far always entail a large application effort for each new application planned.

These disadvantages are to be avoided in the invention. However, it should also be created a way to get along without a complex and possibly trouble-prone additional sensor s.Nehmer and the development expenses (applications) in any calculation method. However, it should certainly be able to respond to temperature-induced actuation position changes. Ultimately, a cost-effective and robust solution should be found.

It is therefore the object of the present invention to avoid the disadvantages known from the prior art and to achieve the objectives explained above. These goals should also be easy to achieve within production.

This object is achieved in a generic slave housing / slave cylinder characterized in that a prepared for supplying electrical signals temperature sensor is arranged connected to the housing and / or is integrated.

In the actuated state is usually a large part of the fluid volume in the slave, so the slave housing, such as a CSC (Concentric Slave Cylinder) moved. But just as a CSC is also the subject of the invention. If the temperature in the receiver can be measured in a simple manner, a simple and robust method results, which allows temperature-induced changes in position to be determined and corrected. For this purpose, a temperature sensor on or in the receiver, e.g. proposed to the slave housing of the CSC. These measures can considerably simplify / make the calculation model considerably more robust due to a meaningful on-site information.

The manufacturing can then be simplified and precise on-site information of an ECU respectively. Thus, the measurement can be fed to a measuring station, which then feeds an actuator controller using a model and switching on an ECU. This actuator controller can then, exercising adjusting movements, act on a piston, for example of the CSC.

The invention can thus be used particularly favorably for CSCs in so-called "K0" activation sections.

Advantageous embodiments are claimed in the subclaims and are explained in more detail below.

So it is advantageous if the temperature sensor is attached to the slave housing or in the slave housing or integrated. A failsafe design over the lifetime can then be achieved efficiently.

If the temperature sensor is arranged on the outside, for example on a lateral surface or an end face of the slave cylinder, the positionability of the temperature sensor is particularly easily possible. It is then particularly easy to assemble. Adhesive or screw-on solutions can be used on the outside of the slave housing to connect the temperature sensor.

It is also advantageous if the temperature sensor extends at least from the outside to an inner surface of the slave housing, preferably ends flush with the inner surface, and / or protrudes into the cavity, such as in a dead space. It can then deliver very precise results. However, it is important to ensure that the temperature sensor can not get into disabling contact with the piston. It is also preferred if no contact with the piston occurs.

Furthermore, it is expedient if the temperature sensor is embedded at a distance from the edge of the preferably designed as a slave cylinder slave housing in a portion of its wall. This can generate a particularly robust solution.

The assembly is also simplified when the temperature sensor is connected to a cable or a plug or is connectable and the temperature sensor and / or the cable or the plug on the outside of the slave housing is / injected. The further connection with peripheral devices, in particular with the ECU can then be accomplished very easily.

It is also advantageous if two cavities for receiving a respective piston are present. The use with double clutches is then easily possible. Again, the placement of an "add-on" temperature sensor on or in the slave, so the slave housing, in particular the housing of the CSC, possible. While it is possible to integrate the temperature sensor directly into the housing parts, for example by injecting into the molded plastic housing, it is just as possible to integrate a sensor plug in the plastic housing. The plastic housing forms in its design in a variant also equal to the plug directly from.

It is beneficial to use nickel-chromium-nickel sensors or PT100 or PT1000 sensors. For uniform temperature detection, several of these simple and inexpensive sensors can be distributed to the slave / slave housing. This solution is also suitable for so-called double CSCs for use in dual-clutch transmissions. The temperature detection can per part-CSC, ie for the clutch 1 and the clutch 2 separated or particularly advantageous for both together, for example between the two Wirkräumen (including only a plug) done. So it is advantageous if two cavities for receiving a piston are present and in a particular embodiment per piston or cavity (only / at least) depending on a temperature sensor is present or (only / at least) a common temperature sensor is present.

It has also proven effective if the common temperature sensor is arranged between the two cavities in the material of the slave cylinder or is surrounded on all sides by the slave cylinder material. The number of items is then reduced and the structure is particularly cost. In such an embodiment, a double CSC then has a temperature sensor arrangement which is assigned to the two pressure chambers.

The invention ultimately also relates to a clutch, such as a single clutch or a double clutch, for a clutch system, with a slave housing of the type according to the invention, in which at least one piston is movably mounted.

The invention also relates to a clutch system, comprising a clutch and an ECU, as well as a CSC with a slave housing of the type according to the invention, in which at least one piston is movably mounted and a clutch for a clutch system with such a CSC.

In other words, it could also be stated that the invention relates to a slave cylinder with integrated temperature sensor. In order to be able to measure the temperature of the hydraulic fluid inside the slave cylinder, and based on To be able to conclude the measured temperature on actuation position changes, the invention proposes to provide a temperature sensor on or in the slave cylinder. This can either be attached to the slave cylinder housing, or else be injected into this. Also the use with double CSCs is conceivable. Here, either one sensor, in particular in the form of a nickel-chromium-nickel sensor, can be provided for each pressure chamber or a common sensor between the pressure chambers for both chambers.

The invention will be explained in more detail with the aid of a drawing.

Show it:

1 a circuit diagram for reflecting the basic idea of the invention, wherein the temperature detection of the fluid volume is achieved in the slave cylinder via its own temperature sensor,

2 a first embodiment in which an "add-on" temperature sensor is placed on the slave housing,

3 a second embodiment in which the "add-on" sensor is positioned in the slave housing,

4 a further embodiment in which the temperature sensor is integrated in a housing part of the slave housing,

5 a further embodiment in which a sensor plug for the temperature sensor is designed as part of the slave housing, namely integrated into the plastic housing,

6 a further embodiment of a slave housing, for use in a double-CSC, but with its own temperature sensor provided for each piston, that is, the temperature sensors are thus used separately for both fluid spaces, and

7 a further embodiment, as a variant of the embodiment of 6 in which a double CSC with only one temperature sensor assigned to the two pressure chambers is used.

The figures are in part only of a schematic nature and serve only to understand the invention. The same elements are given the same reference numerals.

In 1 is a slave housing 1 indicated in a coupling system 2 , which is only hinted at, is embedded. The coupling system 2 also includes a piston 3 in a cavity 4 is arranged and is longitudinally movable there. About one in the 1 not shown temperature sensor 5 (but see in this regard, for example. 2 to 7 ), becomes a measurement of a measuring device 6 fed. The measuring device 6 is able to output signals to an output area 7 supply. About a model 8th will be an ECU separately 9 involved. The ECU 9 controls an actuator controller 10 , It is possible that an intermediate link 11 is used.

In the in 2 illustrated embodiment, the temperature sensor 5 on a lateral surface 12 , so an outer surface 13 of the slave housing 1 attached and attached there. It is glued on, but can also be screwed or sprayed on. A form, force and / or material connection is possible. The piston, which can also be called an actuating piston 3 acts on an actuation bearing 14 one. The cavity 4 can also be referred to as fluid space.

Alternatively, a slave housing 1 as it is in 3 is shown as a second embodiment, are used. The same types of fastening, as already known from the first embodiment, can be used here. The temperature sensor 5 protrudes through a wall 15 of the slave housing 1 therethrough. He juts into the area of a dead space 16 of the cavity 4 into it. A retraction movement of the piston 3 is marked with an arrow, which also has an arrowhead at its other end to indicate the extension movement.

In the third embodiment, the temperature sensor 5 in the made of plastic slave housing 1 injected.

In the fourth embodiment of the 5 is a temperature sensor connector 17 that also as a plug 17 can be briefly referred to, on the outside of the slave housing 1 educated. He is integrated there. The plastic housing forms the plug 17 in shape with out.

In the first embodiment for a dual CSC, two temperature sensors are used 5 used, namely for each cavity 4 a. For every cavity 4 , So fluid space, are individual pistons 3 provided, each on separate actuating bearings 14 act. A temperature sensor 5 is the outside of the two cavities 4 arranged, whereas a temperature sensor 5 between both cavities 4 is arranged. Again, it has been managed, two temperature sensor connector 17 , one for each temperature sensor 5 , on the outside of the slave housing 1 Thus, a double CSC is proposed, each with a temperature sensor arrangement for the two fluid spaces separated from each other.

To do otherwise, is a second embodiment in 7 visualized for a double CSC, with one of the two pressure chambers associated temperature sensor arrangement. In this embodiment, a single temperature sensor 5 between the two cavities 4 used.

LIST OF REFERENCE NUMBERS

1

 takers housing

2

 coupling system

3

 piston

4

 cavity

5

 temperature sensor

6

 measuring device

7

 output field

8th

 model

9

 ECU

10

 Actuator Controller

11

 intermediary

12

 lateral surface

13

 outer surface

14

 operation seat

15

 wall

16

 dead space

17

 Temperature sensor plug / plug

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102008057644 A1 [0002]

Claims (10)

Slave housing ( 1 ) for use in a motor vehicle clutch system ( 2 ) with at least one cavity prepared for receiving hydraulic fluid ( 4 ), in which a hydraulically movable piston ( 3 ), characterized in that a temperature sensor prepared for supplying electrical signals ( 5 ) is arranged on the housing. Slave housing ( 1 ) according to claim 1, characterized in that the temperature sensor ( 5 ) on the slave housing ( 1 ) or in the slave housing ( 1 ) is attached or integrated. Slave housing ( 1 ) according to claim 1 or 2, characterized in that the temperature sensor ( 5 ) on the outside, such as on the lateral surface or an end face of the slave housing ( 1 ) is arranged. Slave housing ( 1 ) according to one of claims 1 to 3, characterized in that the temperature sensor ( 5 ) at least from the outside to an inner surface of the slave housing ( 1 ) and / or into the cavity ( 4 protrudes. Slave housing ( 1 ) according to one of claims 1 to 4, characterized in that the temperature sensor ( 5 ) from the edge of the slave housing ( 1 ) in a section of its wall ( 15 ) is embedded. Slave housing ( 1 ) according to one of claims 1 to 5, characterized in that the temperature sensor ( 5 ) on a cable or plug ( 17 ) is connected or can be connected and the temperature sensor ( 5 ) and / or the cable or the plug ( 17 ) on the outside of the slave housing ( 1 ) is injected / injected. Slave housing ( 1 ) according to one of claims 1 to 6, characterized in that two cavities ( 4 ) for receiving a respective piston ( 3 ) available. Slave housing ( 1 ) according to claim 7, characterized in that per piston ( 3 ) or cavity ( 4 ) one temperature sensor each ( 5 ) or a common temperature sensor ( 5 ) is available. CSC with a slave housing ( 1 ) according to one of the preceding claims, in which at least one piston ( 3 ) is movably mounted Coupling for a coupling system ( 2 ) with a CSC according to any one of the preceding claims.

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