WO2021026579A1

WO2021026579A1 - Plug assembly for use in an internal combustion engine

Info

Publication number: WO2021026579A1
Application number: PCT/AT2020/060299
Authority: WO
Inventors: Harald Hartmann
Original assignee: Henn Gmbh & Co Kg.
Priority date: 2019-08-14
Filing date: 2020-08-12
Publication date: 2021-02-18
Also published as: AT522335B1; AT522335A4

Abstract

The invention relates to a plug assembly (1) for use in an internal combustion engine, comprising a tube (3) and a plug-in connector (4), which comprises a connector body (6) having a ring chamber (21), which is located between a first shell portion (11) and a second shell portion (14) of the plug-in connector (4), wherein the first shell portion (11) is enclosed by the second shell portion (14), wherein a connection portion (31) of the tube (3) is inserted into the ring chamber (21) of the connector body (6) and connected thereto. The first shell portion (11) has at least one bulge (53), which deviates from a circular cross-section when viewed in the cross-section, wherein the tube (3) is clamped in the assembled state of the plug assembly (1) at least in the region of the bulge (53) by means of the first shell portion (11) and/or of the second shell portion (14) of the connector body (6).

Description

CONNECTOR ASSEMBLY FOR USE IN A COMBUSTION ENGINE

The invention relates to a connector assembly and a method for connecting a connecting section of a pipe for liquid or gaseous media with a connector, and a pressing tool for carrying out the method.

From AT 509 196 B1 a method for connecting an end section of a line for liquid or gaseous media to a connector is known. The line for liquid or gaseous media is a flexible plastic hose. In the connection process, a first wall section of the connector is deformed with a pressing tool in the direction of a second wall section surrounding the first wall section in the form of a sleeve. In this case, an end section of the line lying between the first wall section and the second wall section of the connector is clamped between the first wall section and the second wall section. Another method for producing a connector is known from EP3134670B1.

The method described in AT 509 196 B1 for connecting the end section of a line to the connector or the design of the connector has the disadvantage that only flexible end sections of tubes can be connected to a connector by such a method. A plastic pipe that should not be stretched in its diameter, such as a glass fiber reinforced plastic pipe, cannot be connected to the connector by the method described in AT 509 196 B1 without damaging the plastic pipe.

The present invention is based on the object of providing a connector assembly and a method for connecting a connecting section of a pipe for liquid or gaseous media to a connector by means of which non-expandable pipes can also be connected.

The object of the invention is achieved by the connector assembly and by the method for connecting the connector according to the claims.

According to the invention, a plug assembly comprising a tube and a connector is formed. The connector includes a connector body, the connector body has an annular space which lies between a sleeve-shaped, in cross-section a central longitudinal axis of the connector ring-shaped surrounding first jacket section and a sleeve-shaped, in cross-section the central longitudinal axis ring-shaped second jacket section of the connector. The first jacket section is surrounded by the second jacket section. The first jacket portion of the connector body is connected to the second man telabschnitt at a first end portion by a first end wall portion and the jacket portions are open to each other at a second end portion, whereby a tube receiving side of the connector body is formed. A connection sab section of the pipe res is inserted from the pipe receiving side into the annular space of the connector body and connected to it. The first jacket section has a bulge that differs from a circular cross-section when viewed in cross section, the tube being clamped exclusively in the area of the bulge by means of the first jacket section and / or the second jacket section of the connector body when the plug assembly is assembled. Furthermore, it can be provided that the plug assembly comprises a sealing element which is arranged between the tube and the first jacket section.

The advantage of the design according to the invention is that the bulge of the first jacket section enables the tube to be clamped at least in the area of the bulge between the first jacket section and the second jacket section without the circumference of the tube having to be stretched. Thus, an improved longevity of the pipe can be achieved and at the same time a sufficient clamping of the pipe can be achieved. In particular, the measures according to the invention make it possible for non-expandable pipes to be pressed together without the pipe being damaged in the process, in particular without the pipe tearing open.

Furthermore, it can be expedient if the tube lies fully against the first jacket section and the tube has a tube bulge which corresponds to the bulge of the first jacket section. This has the advantage that a media-tight connection can be achieved between the first jacket section and the pipe.

Furthermore, it can be provided that the tube rests against the second jacket section exclusively in the area of the bulge. In particular, if the pipe is not to be stretched, it is expedient that the pipe rests exclusively in the region of the bulge on the second jacket section. It is thus conceivable that the tube itself or the connector is large Have manufacturing tolerances and nevertheless the pipe can be clamped between the first jacket section and the second jacket section without the pipe having to be stretched.

In addition, it can be provided that the connection sab section of the pipe has a fixing recess made on a circumferential surface of the pipe and a seal saufnahme axially spaced therefrom, with a positive connection between the first jacket section of the connector body and the fixing recess of the pipe in the assembled state of the connector assembly is produced, and wherein the sealing element is pressed between tween the first jacket section and the seal receptacle, the first jacket section having the bulge deviating from a circular cross section at least in the region of the fixing recess. This has the advantage that a positive connection can be established between the pipe and the connector in the area of the fixing recess, so that the pipe can be firmly received in the connector. At the same time, a tight connec tion between the pipe and the connector can be established in the area of the seal receptacle.

Furthermore, it can be provided that between two and five, in particular four, bulges are formed distributed over the circumference. In particular, it can be provided that the bulges are arranged distributed uniformly over the circumference. In other words, the first jacket section can have a polygonal cross section, with the corners being rounded.

According to the invention a method for connecting a connecting section of a pipe res for liquid or gaseous media with a connector is provided, the connector comprising a connector body, which connector body has an annular space between a sleeve-shaped, in cross-section a central longitudinal axis of the connector annularly surrounding first jacket section and a sleeve-shaped, in cross section the central longitudinal axis annularly surrounding the second jacket portion of the connector, wherein the first jacket portion is surrounded by the second jacket portion and the first jacket portion of the connector body is connected to the second jacket portion at a first end portion by a first end wall section and the man tel sections are open to each other at a second end portion, whereby a Rohrauf receiving side of the connector body (6) is formed, wherein - In a method step, the connecting section of the pipe is pushed into the annular space of the connector from the pipe receiving side of the connector body and positioned;

- In a further process, a pressing tool step presses the first jacket section of the connector body radially outward.

The pressing tool presses the first jacket section of the connector body radially outwards, at least in sections, in such a way that a bulge deviating from a circular cross section is formed on the first jacket section when viewed in cross section, with the tube in the assembled state of the plug assembly at least in the area of the bulge by means of the first jacket section and / or the second jacket portion of the connector body is clamped. Furthermore, it can be provided that, in one process step, a sealing element is introduced into the annular space of the connector between the first jacket section and the second jacket section, in particular adjacent to the first jacket section.

The advantage of the method according to the invention is that the bulge of the first jacket section allows the tube to be clamped at least in the area of the bulge between the first jacket section and the second jacket section without the circumference of the tube having to be stretched. Thus, an improved longevity of the pipe can be achieved and at the same time a sufficient clamping of the pipe can be achieved.

Furthermore, it can be provided that the first jacket section of the pipe is deformed in such a way that the circumference of the pipe is enlarged between 0% and 1%, in particular between 0% and 0.1%, and the pipe from a circular cross-sectional geometry to a cross-sectional geometry with a Tube bulge is deformed. This has the advantage that sufficient clamping of the pipe in the plug connector can be achieved without the pipe being damaged in the process.

According to a particular embodiment, it is possible that a first sub-area of the press tool deforms the first jacket section in such a way that a positive connection is established between the pipe and the connector, and a second sub-area of the press tool is axially spaced from the first jacket section deformed in such a way that the sealing element is compressed by the first jacket section and is thus clamped between the first jacket section and the pipe. This measure enables a particularly stable connection to be established between the plug connector and the pipe. In addition, this measure enables a tight connection to be achieved despite poor surface quality at the pipe connection and with extremely hard, heavily reinforced materials.

According to the invention, a pressing tool is provided for performing a method for connecting a plug connector to a pipe. On a pressing surface, the pressing tool has at least one pressing tool bulge deviating from a circular cross section. Particularly with a pressing tool designed in this way, a tight and permanent connection between a connector and a pipe can be established.

In particular, it can be provided that several pressing tool bulges are formed distributed over the circumference.

For a better understanding of the invention, it is explained in more detail with reference to the following figures.

They each show in a greatly simplified, schematic representation:

1 shows a perspective illustration of a plug assembly in a quarter section;

2 shows a vehicle equipped with the connector assembly;

3 shows a sectional illustration of the plug assembly in an exploded view;

Fig. 4 is a sectional view of the connector assembly of Figure 3 in an assembled position;

5 shows a sectional view of the plug assembly according to FIGS. 3 and 4 in an assembled and pressed position;

6 shows a perspective view of the plug assembly with a pressing tool;

7 is a cross-sectional view of the connector assembly in an assembled position. At the outset, it should be noted that in the differently described embodiments, the same parts are provided with the same reference numerals or the same component designations, and the disclosures contained in the entire description can be transferred accordingly to the same parts with the same reference numerals or the same component names. The position details chosen in the description, such as above, below, side, etc., refer to the figure immediately described and shown and these position details are to be transferred accordingly to the new position in the event of a change in position.

Fig. 1 shows a perspective view of an embodiment of a plug assembly 1, this being shown in section in a quarter section. Furthermore, a mating connector 2 is shown schematically in Fig. 1, which can be connected to the connector assembly 1. The interaction between the connector assembly 1 and a mating connector 2 is sufficiently described in AT 509 196 B1.

In Fig. 1, the connector assembly 1 is shown in an assembled state. The connector assembly 1 comprises a tube 3, a connector 4 and a sealing element 5 inserted between the connector 4 and the tube 3. The connector 4 comprises a connector body 6, which is preferably formed as a one-piece formed part, for example as a deep-drawn part, in particular from a stainless steel sheet.

FIG. 2 shows a schematic representation of a vehicle 7 with a built-in connector assembly 1 corresponding to FIG. 1. As can be seen in FIG. 2, the connector assembly 1 is preferably used in a vehicle 7, in particular in a road vehicle with an internal combustion engine. In particular, the connector assembly 1 is used to connect various components of the fresh air supply to the internal combustion engine. For example, it can be provided that the connector assembly 1 is provided with the corresponding mating connector 2 for connecting two parts in the intake area of a turbocharger 8. Furthermore, it can also be provided that such a plug connection is used in the pressure side going out from the turbocharger 8 to connect two components.

3 shows a section through the plug assembly 1 along a central longitudinal axis 9 of the plug connector 4. In order to be able to describe the individual components well, they are shown in an exploded view in FIG. 3. As can be clearly seen in FIG. 3, it can be provided that the connector 4 comprises, in addition to the connector body 6, a connector seal 10 which is accommodated in the connector body 6. The connector seal 10 is used to sufficiently seal the connector assembly 1 in the mated state with a mating connector 2 can.

As can be seen in FIG. 3, a first jacket section 11 is formed on the connector body 6, which surrounds the central longitudinal axis 9 of the plug connector 4 in the form of a sleeve. In other words, the first jacket section 11 is a rotationally symmetrical hollow cylinder.

The first jacket section 11 has an inner jacket surface 12 and an outside jacket surface 13. The first jacket section 11 surrounds a second Mantelab section 14, which is also formed from rotationally symmetrical with respect to the central longitudinal axis 9. The first jacket section 11 is connected to the second jacket section 14 at a first end section 15 by means of a first end wall section 16.

Like the first jacket section 11, the second jacket section 14 also has an inner jacket surface 17 and an outer jacket surface 18.

The first shell section 11 is limited by its inner shell surface 12 and the outer shell surface 13, whereby a wall thickness 19 of the first Mantelab section 11 results. The second jacket section 14 is also limited by an inner jacket surface 17 and an outer jacket surface 18, whereby a wall thickness 20 of the second jacket section 14 results.

The spacing of the two casing sections 11, 14 from one another results in an annular space 21. The annular space 21 is delimited in particular in the radial direction by the outer casing surface 13 of the first casing section 11 and by the inner casing surface 17 of the second casing section 14. In particular, this results in an annular space gap 22. This annular space gap 22 is preferably selected so large that the tube 3 can be at least partially received therein. In the illustrated embodiment, the annular space gap 22 is between 2mm and 20mm, in particular between 3mm and 10mm, preferably between 4mm and 6mm. The two jacket sections 11, 14 are open to one another at a second end section 23 of the plug connector 4, whereby a tube receiving side 24 of the connector body 6 results.

It can be provided that the first jacket section 11 has a bevel 25 which is formed on the tube receiving side 24 of the first jacket section 11. Such a bevel 25 has the advantage that a sealing element 5 can easily be pushed onto the first jacket section 11 in the push-in direction 26. In addition, it can also be provided that the second jacket section 14 has such a bevel 27 so that the tube 3 can also be easily pushed into the annular space 21.

The bevels 25, 27 can be realized, for example, by flanging with corresponding radii and are preferably formed out during the deep-drawing process.

Furthermore, it can be provided that the first jacket section 11, viewed in the direction of the first end section 15 of the plug connector 4, is followed by a seal receptacle 28 which is also formed in the connector body 6. A plug seal 10 can be received in such a seal receptacle 28. Furthermore, it can be provided that a third jacket section 29 connects to the seal receptacle 28 and serves to accommodate the mating connector 2. At the third jacket section 29 of the Stirnwandab section 16 can connect, which section 14 connects the third jacket section 29 with the second Mantelab. As already mentioned, this structure or connection means that the first jacket section 11 is connected to the second jacket section 14 via the end wall section 16.

The connector body 6 is preferably produced in a deep-drawing process, with all wall thicknesses of the jacket sections of the connector body 6 being approximately the same.

As can be seen in the view in FIG. 3, it can also be expedient for the seal holder 28 to have an end wall 30 which adjoins the first jacket section 11. The end wall 30 can be bent here in particular in the direction of the second Mantelab section 14, whereby a receiving trough for the connector seal 10 results. The formation of the end wall 30 also has the advantage that, during the assembly of the plug assembly 1, the sealing element 5 can be pushed into the annular space 21 in the direction of insertion 26 until it rests against the end wall 30. The end wall 30 can also serve to facilitate the positioning process of the sealing element 5. In other words, the end wall 30 serves as an axial positioning stop for the sealing element 5.

The annular space 21 is designed to accommodate the sealing element 5 and a connection formed on the pipe 3 from sab section 31.

The sealing element 5 is also essentially a rotationally symmetrical body, an essentially rectangular cross section being rotationally symmetrical about the central longitudinal axis 9. This results in an inner circumferential surface 32 and an outer circumferential surface 33 on the sealing element 5, which are arranged at a certain distance from one another, resulting in a wall thickness 34 of the sealing element 5. The wall thickness 34 of the sealing element 5 is preferably selected to be so large that the sealing element 5, which is preferably formed from a flexible material, can easily be deformed. A wall thickness 34 between 1 mm and 10 mm, in particular between 2 mm and 5 mm, is preferably selected in order to obtain a sealing element 5 which can best fulfill its function.

An inner diameter 35 of the sealing element 5 is selected to be approximately as large as an outer diameter 36 of the first casing section 11. It is advantageous if the two diameters 35, 36 are coordinated so that the sealing element 5 easily fits onto the first casing section 11 can be postponed and finds a good hold there.

The connection sab section 31 of the tube 3 has a fixing recess 37.

Furthermore, the tube 3 has a seal receptacle 38 which, when the connector assembly 1 is assembled, interacts with the sealing element 5. In particular, it can be provided that in the assembled state of the plug assembly 1, the outer jacket surface 33 of the sealing element 5 rests on an inner jacket surface 39 of the seal receptacle 38. For this purpose, it is advantageous if an inner diameter 40 of the seal holder 38 is selected to be approximately the same size as an outer diameter 41 of the sealing element 5. The two diameters 40, 41 are preferably selected so that the pipe 3 can easily be pushed over the Dichtungsele element 5 during the assembly process of the plug assembly.

In a preferred embodiment, as shown in FIG. 3, it can be provided that both the fixing recess 37 and the seal receptacle 38 are made in an inner jacket surface 42 of the tube 3.

The fixing recess 37 and the seal receptacle 38 are preferably arranged axially spaced from one another in the tube 3.

An outer diameter 43 of the tube 3 is preferably chosen so that it is smaller than an inner diameter 45 of the second jacket section 14 of the connector body 6. As a result, the tube 3 can easily be pushed into the annular space 21 of the connector body 6 during the assembly of the connector body 1.

Furthermore, it can be provided that the pipe 3 has a greater wall thickness in the area of its connecting section 31 than in a cylindrical pipe section.

An assembly of the plug assembly 1 is described below with reference to the illustration in FIG. 3.

In a first process step, the sealing element 5 is inserted into the annular space 21. Here, the sealing element 5 in the annular space 21 can be shifted in the direction of insertion 26 until it rests against the end wall 30 of the seal receptacle 28.

If the sealing element 5 is correctly positioned in the connector body 6, the tube 3 can now be pushed into the annular space 21 in the insertion direction 26 in a further process.

Fig. 4 shows a sectional view corresponding to FIG. 3. However, in this view, both the sealing element 5 and the tube 3 are in a plugged-together position, in which they are pushed into the annular space 21 of the connector body 6. In FIG. 4, the same reference numerals or component designations are used for the same parts as in the previous FIG. 3. In order to avoid unnecessary repetition, reference is made to the detailed description of the preceding FIG. 3. As can be seen from Fig. 4, in the joined state, the pipe 3 in the annular space 21 is aufgenom men, with a joint gap 44 being formed between the inner surface 17 of the second jacket portion 14 and the pipe 3. The joint gap results from the fact that the outer diameter 43 of the pipe 3 is larger than an inner diameter 45 of the second jacket section 14.

5 shows a further sectional view of the connector assembly 1 corresponding to the representations in FIGS. 3 and 4. In FIG. 5, the same reference numerals or component designations as in the preceding FIGS. 3 and 4 are used for the same parts. In order to avoid unnecessary repetitions, reference is made to the detailed description of the preceding FIG. 3.

In the sectional view in Fig. 5, the connector assembly 1 is shown in a pressed state. As can be seen in FIG. 5, the first jacket section 11 is deformed at a first deformation point 46 in such a way that a positive connection between the first jacket section 11 and the fixing recess 37 is established. In particular, the first jacket section 11, in particular the outer jacket surface 13 of the first jacket section 11, is in close contact with the fixing recess 37. The tube 3 can be secured in its axial position relative to the connector body 6 through this first reshaping point 46.

According to the invention, it is provided that in the deformed state of the connector 4, as shown in FIG. 5, the inner lateral surface 12 is no longer rotationally symmetrical, but has a shape deviating from the rotational symmetry, as shown in FIG. 7.

Locally separated from this first forming point 46 is a second forming point 47 in which the first jacket section 11 of the connector body 6 is deformed to such an extent that the sealing element 5 is clamped between the first jacket section 11 and the seal receptacle 38 of the tube 3. This clamping also results in a deformation of the sealing element 5, which is preferably formed from a soft elastic material such as rubber.

In particular, the inner circumferential surface 32 of the sealing element 5 is pressed against the outer circumferential surface 13 of the first jacket section 11, so that these are tightly packed. no matter what. Furthermore, the outer circumferential surface 33 of the sealing element 5 is pressed against the inner circumferential surface 39 of the seal s receptacle 38 in the pipe 3, so that these surfaces also lie tightly against one another. This second deformation point 47 and the associated compression of the sealing element 5 ensures that the pipe 3 can be sufficiently sealed with respect to the plug connector 4 in order to prevent a gas under pressure from flowing out.

6 shows a perspective view of a sectional illustration through a press machine

48 with the plug assembly 1 clamped open according to FIGS. 1 to 5, the cutting line along the central longitudinal axis 9 also being selected here.

As can be seen from FIG. 6, the pressing machine 48 comprises a pressing tool 49, by means of which the first jacket section 11 of the connector body 6 can be deformed and thus the press connection of the plug assembly 1 can be established. The pressing tool 49 moves in the radial direction 50 during the pressing process.

The pressing tool 49 is designed in such a way that it has two partial areas. A first partial region 51 deforms the first jacket section 11 so that a first deformation point 46 is formed. The first deformation point 46 produces a form-fitting connection between the tube 3 and the connector body 6. A second sub-area 52 of the pressing tool

49 creates a second deformation point 47 through which the sealing element 5 is clamped.

Fig. 7 shows a cross-sectional view of the connector assembly 1 corresponding to a section VII-VII from Fig. 5. In Fig. 7, the same reference numerals or component designations as in the previous Figures 1 to 6 are used for the same parts. In order to avoid unnecessary repetition, reference is made to the detailed description of the preceding FIGS. 1 to 6.

As can be seen from Fig. 7, the cross section of the connector assembly 1 in the deformed position was not rotationally symmetrical. In contrast to this, it is provided that, deviating from the rotational symmetry, the first jacket section 11 has a bulge 53 and, associated therewith, the tube 3 has a tube bulge 54 corresponding to it. The bulge 53 or the tube bulge 54 can be produced by means of a pressing tool bulge 55 provided in the pressing tool 49. In particular, it can be provided that when the connection between the pipe 3 and connector body 6 is established, the pressing tool 49 is pressed outwardly against the first jacket section 11 in the radial direction 50, the pressing tool bulge 55 first coming into contact with the first jacket section 11. Here, the first jacket section 11 is first deformed in the area of the pressing tool bulge 55 and pressed against the tube 3, whereby the tube bulge 54 is formed in the tube 3. The first jacket section 11 is deformed in such a way that the pipe 3 is not expanded with respect to its circumference during the deformation process, but that the pipe 3 is deformed into a polygonal cross section with rounded corners. Since the tube 3 is deformed radially outward in the area of the tube bulge 54, and at the same time the circumference of the tube 3 does not change or only changes slightly, the tube 3 will have to deform radially inward between the tube bulges 54 in order to keep the circumference constant Pipe bulges 54 to be able to compensate.

Furthermore, it can be provided that the tube bulges 54 are only formed in the area of the first deformation point 46 and that in the area of the second deformation point 47 and therefore in the area of the sealing element 5, the first jacket section 11 of the connector body 6 is deformed in such a way that the cross-sectional area is deformed Area is circular.

The deformation of the tube 3 is carried out until the tube 3 is at least in the loading area of the tube bulge 54 on the inner lateral surface 17 of the second Mantelab section 14 is applied. Thus, the pipe 3 can be clamped in the region of the pipe bulge 54 between the first jacket section 11 and the second jacket section 14, with no or only slight tangential stresses being applied in the pipe. Low tangential stresses are understood as stresses which are less than 15%, in particular less than 10%, preferably less than 5% of the tensile strength of the pipe in the tangential direction.

In an alternative variant, the tube bulges 54 can also be achieved with a pressing tool 49 in which the individual segments are all designed the same and thus do not have any pressing tool bulges 55. Here, the individual segments of the pressing tool 49 are pressed unevenly radially outward. In particular, those will Segments of the pressing tool 49 on which the tube bulge 54 is to be formed are first pressed outward.

Away from the tube bulge 54, the joint gap 44 is also formed in the pressed state of the plug connector 4 or, in this area, the joint gap 44 is even enlarged by the mechanisms described above.

The exemplary embodiments show possible design variants of the connector assembly 1, whereby it should be noted at this point that the invention is not limited to the specifically illustrated design variants of the same, but rather various combinations of the individual design variants with one another are possible and this possible variation is possible due to the teaching on the technical Acting through the present invention is within the ability of the skilled person active in this technical field.

The scope of protection is determined by the claims. However, the description and the drawings should be used to interpret the claims. Finzelmerkmale or combinations of features from the shown and described different Ausführungsbeispie sources can represent independent inventive solutions. The task on which the independent inventive solutions are based can be found in the description.

All information on value ranges in the present description are to be understood in such a way that they include any and all sub-areas, e.g. the information 1 to 10 should be understood to include all sub-areas, starting from the lower limit 1 and the upper limit 10 are, ie all sub-ranges begin with a lower limit of 1 or greater and end at an upper limit of 10 or less, for example 1 to 1.7, or 3.2 to 8.1, or 5.5 to 10.

For the sake of clarity, it should finally be pointed out that for a better understanding of the structure of the plug assembly 1, this or its components have been shown partially not to scale and / or enlarged and / or reduced. List of reference symbols plug assembly 28 seal receptacle plug connector mating connector of the pipe 29 third jacket section connector 30 end wall seal receptacle sealing element 31 connecting section connector body 32 inner jacket surface sealing element vehicle ment turbocharger 33 outer jacket surface sealing element longitudinal axis of the connector element plug seal 34 wall thickness sealing element first jacket section 35 inside sealing element inner jacket surface 36 Outside diameter of the first jacket, second jacket section, section of the first end section, connector 37 Fixing recess, front wall section 38 Seal s receptacle, pipe, inner jacket surface 39 Inner jacket surface, seal on the outside jacket surface, wall thickness of first jacket section 40 Inner diameter of seal, wall thickness of second jacket cut, section 41 Outer diameter of sealing element, annular space element, annular space gap 42 Inner jacket surface of the pipe two ter end section plug connector 43 outer diameter pipe of the 44 joint gap pipe receiving side 45 inner diameter second jacket bevel section push-in direction 46 first forming point bevel 47 second forming point

48 press machine Pressing tool radial direction first sub-area second sub-area bulging tube bulging pressing tool bulging

Claims

Patent claims

1. Connector assembly (1), for use in an internal combustion engine, comprising a tube (3), and a connector (4) which comprises a connector body (6), wel cher connector body (6) has an annular space (21) between a sleeve-shaped, in cross section a central longitudinal axis (9) of the connector (4) ring-shaped surrounding the first jacket portion (11) and a sleeve-shaped, in cross section the central longitudinal axis (9) ring-shaped surrounding the second jacket portion (14) of the connector (4), wherein the first jacket section (11) is surrounded by the second jacket section (14) and the first jacket section (11) of the connector body (6) is connected to the second jacket section (14) at a first end section (15) by a first end wall section (16) and the jacket sections (11, 14) are open to one another at a second end section (23), whereby a tube receiving side (24) of the connector body (6) is formed, wherein a connecting section ( 31) of the tube (3) is inserted from the tube receiving side (24) into the annular space (21) of the connector body (6) and connected to it, characterized in that the first jacket section (11) seen in cross section at least one of A bulge (53) deviating from a circular cross-section, with the tube (3) in the assembled state of the plug assembly (1) at least in the area of the expansion (53) by means of the first jacket section (11) and / or the second jacket section (14 ) of the connector body (6) is clamped.

2. Connector assembly (1) according to claim 1, characterized in that the tube (3) rests fully on the first jacket section (11) and the tube (3) has a Rohrausbau chung (54), which with the bulge (53) of the first Jacket section (11) responded kor.

3. Connector assembly (1) according to claim 2, characterized in that the tube (3) rests on the second jacket section (14) exclusively in the region of the tube bulge (54).

4. connector assembly (1) according to any one of the preceding claims, characterized in that the connecting portion (31) of the tube (3) has a fixing recess (37) and axially spaced therefrom a seal saufnahme (38), wherein in the assembled state of the plug assembly (1) a positive connection between the first jacket section (11) of the connector body (6) and the fixing recess (37) of the tube (3) is made and wherein the sealing element (5) is pressed between the first casing section (11) and the seal receptacle (38), the first casing section (11) at least in the region of the fixing recess (37) having the bulge (which differs from a circular cross section) 53).

5. Connector assembly (1) according to one of the preceding claims, characterized in that between two and five, in particular four bulges (53) are formed distributed over the circumference.

6. A method for connecting a connection section (31) of a pipe (3) for liquid or gaseous media to a connector (4), the connector (4) comprising a connector body (6), which connector body (6) has an annular space (21) has, the between a sleeve-shaped, in cross section a central longitudinal axis (9) of the connector (4) ring-shaped surrounding the first jacket portion (11) and a sleeve-shaped, in cross section the central longitudinal axis (9) ring-shaped surrounding the second man portion (14) of the Connector (4) lies, wherein the first jacket portion (11) is surrounded by the second jacket portion (14) and the first jacket portion (11) of the connector body (6) with the second jacket portion (14) at a first end portion (15) by a first end wall section (16) is connected and the jacket sections (11, 14) are open to one another at egg nem second end section (23), whereby a tube receiving side (24) of the connector body (6) au s is formed, where

- In one process step, the connecting section (31) of the tube (3) from the Rohrauf receiving side (24) of the connector body (6) is pushed into the annular space (21) of the connector (4) and positioned;

- In a further process step, a pressing tool (49) presses the first jacket section (11) of the connector body (6) radially outwards, characterized in that the pressing tool (49) at least in sections of the first jacket section (11) of the connector body (6) presses radially outwards in such a way that, viewed in cross section, a bulge (53) deviating from a circular cross section is formed on the first casing section forms, wherein in the assembled state of the plug assembly (1) the tube (3) is finally clamped in the area of the bulge (53) by means of the first jacket section (11) and / or that of the second jacket section (14) of the connector body (6).

7. The method according to claim 6, characterized in that the first Mantelab section (11) of the tube (3) is deformed such that the circumference of the tube (3) between 0% and 1%, in particular between 0% and 0.1 % is increased and the pipe (3) is deformed from a circular cross-sectional geometry to a cross-sectional geometry with a Rohrausbau (54).

8. The method according to claim 6 or 7, characterized in that a first partial area (51) of the pressing tool (49) deforms the first jacket section (11) in such a way that a positive connection between the tube (3) and the plug connector (4) is produced, and axially spaced from the first partial area (51), a second partial area (52) of the pressing tool (49) deforms the first casing section (11) in such a way that the sealing element (5) is compressed by the first casing section (11) and thus is clamped between the first jacket section (11) and the tube (3).

9. Press tool (49) for performing the method according to one of claims 7 to 8, characterized in that the press tool (49) has at least one pressing tool bulge (55) deviating from a circular cross section on a pressing surface.

10. Press tool (49) according to claim 9, characterized in that a plurality of press tool bulges (55) are formed distributed over the circumference.