WO2005061940A1

WO2005061940A1 - Plug element with angle adapter

Info

Publication number: WO2005061940A1
Application number: PCT/EP2004/053146
Authority: WO
Inventors: Wolfram Knis; Tilman Miehle
Original assignee: Robert Bosch Gmbh
Priority date: 2003-12-20
Filing date: 2004-11-29
Publication date: 2005-07-07
Also published as: DE10360336A1

Abstract

The invention relates to a plug element that is received in a low-pressure line system (1) of an internal combustion engine. The plug elements (4) comprise a plug body (5) on which at least one line adapter (7, 8) is configured. A hose adapter (14) is received on the at least one line adapter (7, 8) and is secured by a clamp-type retaining element (19) in the axial direction in relation to the at least one line adapter (7, 8) and is mounted as to be freely movable in the peripheral direction. At least one hose connection (20) is configured on the outer wall (15) of the hose adapter (14).

Description

Plug element with angled adapter

Technical field

In motor vehicle braking machines, the cooling medium circulates in a closed circuit, while when the fuel is being delivered, the fuel is fed to the injection valves, gets into the combustion chambers and only part of the fuel flows back into the tank through return lines. While the fuel supply to the injectors or injectors of the internal combustion engine - depending on the design - is at a higher pressure level, there is a lower pressure level in the return line system for fuel to the fuel tank. It is necessary to connect each injector or each injection valve of the curbing engine to the fuel tank so that excess fuel is returned to the tank.

State of the art

DE 39 07 764 AI has the object of a fuel distributor for fuel injection systems of internal combustion engines. This fuel distributor for fuel injection systems with at least one fuel injection valve and with a valve carrier has a mounting bore for the fuel injection valve and a strain flange surrounding the mounting bore. The fuel injection valve is supported on this by means of a collar. To fix the position of the fuel injection valve, the end flange of the valve carrier and the collar of the fuel injection valve are designed as mutually corresponding parts of a bayonet catch, regardless of a plug hood that is still to be fitted. The connector hood is used as an additional locking device and for this purpose engages with a locking pin in a form-fitting manner in that of the dyeing bwz. Unlocking recesses in the bayonet lock.

DE 197 25 076 AI relates to a fuel injection system. The fuel injection system for injecting fuel into an internal combustion engine comprises at least one fuel injection valve, which has a fuel inlet opening in an inlet section, and a fuel distribution line, which for each fuel injection valve has one with the Fuel inlet opening of the fuel injector has a connectable fuel outlet opening and a connecting piece which adjoins the fuel outlet opening downstream. A connecting device connecting the fuel inlet opening of each fuel injection valve to the associated fuel outlet opening of the fuel distribution line is provided in each case. The connecting device comprises a gasket carrier and a bushing which can be inserted into the fuel inlet opening. The ring-shaped seal carrier has a first seal element for sealing the seal carrier with respect to the inlet section of the fuel injector and a second seal element for sealing the seal carrier with respect to the connecting piece of the fuel distributor line.

DE 10240 130.6-16 relates to a plug connection for media-carrying lines.

A plug body comprises at least one connection point, a sleeve-shaped body made of a first material being received in a form-fitting manner in a securing direction and in an end securing direction on a plug body with a resilient flap.

It has been found that, given the current development trends, it is disadvantageous to form a return plug with a fixed direction of the hose connection nozzle. The position of the hose connector as well as the specified direction can only be varied within very small limits, since these plastic parts are produced by plastic injection molding and new plastic injection molding tools would be required if the direction and position of the hose connector were varied. On the other hand, in the course of engine development, the available installation spaces in the engine compartment are becoming ever narrower, so that there is a need for a variable cable routing. The solutions known from the prior art either do not meet this requirement at all or only to a limited extent.

Presentation of the invention

The solution proposed according to the invention of equipping a plug connector used within a return system with a variable ScMauchführung, on the one hand, guarantees a variable ScMauchführung and, on the other hand, provides a modular system with which, according to the principle of using the same parts, the requirements of the motor vehicle manufacturers regarding the engine compartment are still available standing space available for the routing of the fuel return system can be taken into account to a greater extent. The plug connector, be it with a line connection or with two line sections running at an angle to one another or with provided two opposite line connections can be improved by the adapter element proposed according to the invention in such a way that the hose branch is made rotatable through 360 °. Apart from the rigidity inherent in the scuff material, the most varied of routings can thus be specified.

The ScMauch adapter fastened to the at least one line connection of the plug connector can be fastened to the plug body of the plug connector, for example, with the aid of a retaining clip. The retaining clip can be designed in such a way that the ScMauch adapter can be freely rotated through 360 ° when mounted on the connector. The hose adapter, which can be freely rotated on the line connector and which is fastened to the line connector in the axial direction with the holding hammer, which preferably has two clip legs, is held captively. An O-ring or another elastically designed sealing element is pushed onto the line connector or the connector of the connector and is used for a liquid-tight connection of the ScMauch adapter on the connector connector or the connector body. Several outlets for connecting ScMäuche can be formed on the ScMauchadapter, which is freely rotatably attached to the or the line connection of the connector.

By means of the holding chamber which can be inserted into a correspondingly configured opening of the ScMauch adapter on the side, the ScMauch adapter is held captive on the or cable connection of the connector body of the connector. The ScMauch adapter is fixed in the axial direction with respect to the cable connection by the holding hammer, whereby its rotational movement around its axis is not impeded. The holding hammer is provided with locking lugs which ensure that the holding hammer is locked securely when the ScMauch adapter is installed. The holding hammer is provided with projections configured in the shape of a nose, which engage in the plastic material of the cable section of the connector. This creates a high surface pressure at certain points and creates a positive connection between the retaining hammer and the plastic material of the cable section on the connector body of the connector. While the connector is manufactured using the two-component injection molding process, the holding chamber can be easily and inexpensively manufactured from a single-component injection molding material.

drawing The invention is described in more detail below with reference to the drawing.

It shows:

FIG. 1 shows a line system which can be designed, for example, as a fuel return line system of an internal combustion engine,

FIG. 2 shows a plug connector with two line connections, with a rotatable ScMauch adapter pushed onto one of the line connections with a partially broken ScMauch adapter,

FIG. 3 shows a rear view of the plug connector shown in FIG. 2 with a ScMauchadapter which is accommodated on a line connector and can be rotated through 360 °,

FIG. 4 shows a top view of the holding chamber,

FIG. 5 shows a side view of the holding chamber for fixing the ScMauch adapter on one of the line connections of the plug connector as shown in FIG. 2,

FIG. 6 shows the location of the application of the surface pressure between the retaining leg and the plastic material of the line connector and

Figure 7 shows a cross section through a ScMauch to be attached to the ScMauch adapter.

Auslührungsvarianten

FIG. 1 shows a line system through which a liquid such as e.g. Fuel from an internal combustion engine can be returned to the fuel tank.

A line system 1 which can be removed from FIG. 1 can comprise a plurality of scavenging sections 2 or pipeline sections 2. A branch 3 is received in the line system 1, to which a ScMauch, which is only partially shown in FIG. 1, is connected. The individual ScMauch- or Rohrleitugnsabschnitte 2 are connected to each other via connectors 4, each having a connector body 5. In the upper area of the connector 4, connector fingers 6 are designed, with which the connector body 5 is not closer to one in FIG represented connection point is included. The connectors 4 formed at the end of the line system 1 shown in FIG. 1 only have a first line connection, while the connectors 4 integrated further inside the line system 1 each have two line connections located opposite one another. For example, fuel which is discharged from the injection valves or InjeMoren of an internal combustion engine can be returned to the low-pressure region, ie to the tank of a motor vehicle, via the ScMauch which is received at branch 3. A ScMauch adapter 14 is accommodated in the line system 1 as shown in FIG. 1, which enables the 90 "configuration shown in FIG. 1, ie the line course shown in FIG. 1.

In the upper area of each connector 4, a cover 10 is arranged, which has a recess which interacts with a locking lug 11 formed on the connector finger.

The illustration according to FIG. 2 shows a plug connector integrated into the line system according to FIG. 1 with two line connections lying opposite one another.

It can be seen from the illustration in FIG. 2 that the plug connector 4 has a first line connection 7 and a second line connection 8 opposite this. Each of the two line connections 7 and 8 has a conical surface 9 in order to make it easier to fit a pipe section or pipe section. The plug connector 4 comprises the plug body 5, the plug fingers 6, the first and second line connections 7, 8 and the cover 10. The cover 10 has a recess 12 in which a locking lug 11 formed on the plug finger 6 engages when the plug connector 4 is locked ,

Each of the two pipe connections 7 and 8, as shown in FIG. 2, has one or more rib-shaped ribs 13, which impress a local expansion on a pipe section or pipe section pushed onto the pipe connections 7 and 8, so that a connection that is secure against being pulled off of the pipe section or pipe section pushed onto the pipe connection 7 or 8 is guaranteed. Due to the self-contraction of the pushed-on ScMauch section or pipe section, the pipe or the ScMauchmaterial nestles against the ribs 13, the line connections 7 or 8, so that a secure, tight connection between the line connections 7 or 8 and the ScMauch section or pipe section is established becomes.

In the illustration according to FIG. 2, the ScMauch adapter 14 is located on the second line connector 8. The ScMauch adapter 14 can preferably be one in the way plastic component produced by the one- or multi-component injection molding process, as well as in the connector 4, which is preferably produced in the two-component injection molding process. The ScMauchadapter 14 is essentially cylindrical and is fixed to the second line connector 8 by means of a holding chamber 19. The holding chamber 19 represents an axial securing of the ScMauch adapter 14 on the second line connector 8 of the connector 4. A ScMauchanscMuss 20 is injection molded onto the outer wall 15 of the ScMauch adapter 14, on which a conical surface 9 and at least one ring-shaped rib are also formed with its inner wall 16, the outside of the second line connection 8. To facilitate the lateral opening of the scubbing adapter 14, an expansion 17 is provided in the area of the inner wall 16. If the essentially sleeve-shaped ScMauchadapter 14 is pushed laterally onto the second line connector 8, the passage of a sealing element 18, for example an O-ring, which can be accommodated on the outer surface of the first or second line connector 8, is passed more easily. The ScMauchadapter 14 is axially secured on the lateral surface of the second line connector 8 by laterally screwing in the holding chamber 19, the two clamp legs of which have to encircle the plastic material of the second line connector 8. Axial fixation of the sleeve-shaped ScMauch adapter 14 is ensured by the bow-shaped holding chamber 19, which, however, remains rotatable by 360 ° about its axis according to the double arrow 21. As a result, the ScMauchansCM 20 molded onto the outer wall 15 of the ScMauch adapter 14 can be rotated into any rotational positions, which enables a high degree of flexibility when laying flexible ScMäuche in the engine compartment. A deflection of the flow cross section, which is given by the first line connection 7, the second line connection 8 and the ScMauchanscMuss 20, is achieved by 90 ° in the illustration according to FIG. Of course, it is also possible to inject the ScMauchansMMuss 20 molded onto the ScMauch adapter 14 in FIG. 2 in a different angular position than shown in FIG. 2, ie 90 °. Even when the ScMauch adapter 20 is molded on at an angle of 45 or 135 "axis of the ScMauch adapter 14, the ScMauch adapter 14 can be rotated 360 ° in the circumferential direction, so that depending on the customer's requirements, ie depending on the available installation space, in engine compartments Varying car manufacturers can implement the most varied of SCM smoke guides, taking into account the available installation space. The SCMauch adapters 14, irrespective of the orientation of their SCM smoke connections, must be 20 by 45 °, 60 °, 90 °, 135 ° or other angles Standard parts are designed in such a way that the inside diameter allows mounting on the plug connectors 4, be they with a line connection or be provided with two line connections 7 or 8 located opposite one another. Below the plug finger 6, a web 22 is molded onto the plug connector 4 shown in FIG , which acts as a contact surface for an end face of the can serve essentially sleeve-shaped ScMauchadapter 14. After the sleeve-shaped ScMauchadapter 14 has been screwed onto the first or second line connector 7, 8 and the end face has abutted against the web surface 22, the ScMauchadapter 14 can be screwed into the correspondingly configured opening on the ScMauchadapter 14 in the axial direction on the respective line connector by inserting the holding chamber 19 7 and 8 are fixed, the rotational movement of which is not impeded by 360 ° in the circumferential direction.

FIG. 3 shows a rear view of the connector shown in FIG. 2 with the ScMauchadapter pushed on to the side.

3 shows that the ScMauch adapter 14 is accommodated on the second line connector 8 of the connector 4. The ScMauchadapter 14 is fixed to the second line connector 8 by means of the holding chamber 19 shown in FIG. 2, a first bracket leg 23 and a second bracket leg 24 of the holding chamber 19 being dimensioned such that the ends of the first bracket leg 23 and the second bracket leg 24 are flush with the outer wall 15 of the ScMauchadapter 14 end. This ensures that the twisting movement of the ScMauchadapter 14 on the second line connector 8 of the connector 4 is impeded by bumping on the connector finger 6. Thus, the ScMauchadapter 14 can be rotated by 360 ° about its axis of symmetry in order to enable different installation space conditions for guiding fuel hoses or other media-guiding ScMäuche in the engine compartment. The ScMauchanscMuss 20 is arranged laterally on the outer wall 15 of the ScMauchadapter 14, so that the rotational movement of the ScMauchadapter 14 is not hindered by the axial extension of the connector finger 6.

The illustration according to FIG. 4 shows the top view of the holding chamber with which the ScMauch adapter is attached to the connector 4.

The holding chamber 19 is preferably manufactured as an injection molded component and has a first clip leg 23 and a second clip leg 24. The holding chamber 19 is pushed in the mounting direction 25 onto the first and second line connections 7, 8 shown in FIGS. 2 and 3. When the holding chamber 19 is locked within the ScMauch adapter 14, tab-shaped projections 27 are formed on the outer sides of the first clamp leg 23 and the second clamp leg 24, with which the holding chamber 19 can be fixed in the plastic material of the ScMauch adapter 14 in the inserted state. The holding direction is indicated by reference numeral 26.

FIG. 5 shows a side view of the holding chamber according to FIG. 4. The holding chamber 19 is essentially U-shaped, the free space surrounding the first and the second line connection 7, 8 being limited by the expandable first clip legs 23 and second clip legs 24. On the outside of the clamp legs 23 and 24 there are nose-shaped projections 27 with which the holding chamber 19 is locked in the plastic material of the ScMauch adapter 14 and deforms the plastic material. The holding cam 19 is preferably made of a metallic material.

The representation according to FIG. 6 shows in a scaled-up representation the contact point between one leg of the holding chamber and the plastic material of the line connector of the connector.

It can be seen from the illustration in FIG. 6 that protrusions 30 which taper to a point are formed on the inner sides of the first clamp leg 23 or the second clamp leg 24 of the holding chamber 19. When the holding hammer is pushed in the mounting direction 25 onto the circumferential surface of the first line section 7 or the second line section 8 of the plug body 5, the clamp legs 23, 24 expand due to the passage of the run-up slope 30.2, the end point of which is formed by the leg projection 30.1. On the retaining track 29, the tip of the leg protrusion 30.1 merges with the plastic material of the angle adapter 14. This results in a constriction in the plastic material of the angle adapter 14. This constriction 31 of the plastic material makes the first clip leg 23 and the second clip leg 24 on the circumference of the first Line connection 7 or the second line connection 8 of the plug body 5 is fixed. By inserting the clamp legs 23, the plastic of the ScMauchadapter 14 is loaded in the area of the constriction 31. As a result, the plastic material flows around the constriction point 31 into a space 28 behind it after the holding chamber 19 has been plugged on.

The illustration according to FIG. 7 shows a cross section through a ScMauchmaterial. The smoke section 2 shown in FIG. 7 comprises a plurality of tubes, an outer jacket 33 is made of a plastic material (CM). A further layer of the smoke section 2 can be made from an armid fabric 34, while the inner layer 35 of the smoke section 2 delimiting the flow cross section 32 can be made of HNBR or FPM. Due to the multi-layer structure of the scuffing section 2 as shown in FIG. 7, fuel resistance of the scuffing section 2 is guaranteed on the one hand, while on the other hand there is a high degree of kink resistance. The inner lining 35 is preferably formed from fuel-resistant rubber HNBR, FPM, while the aramid fabric 34 is an aramid braid. By a variation of the tissue allows the scuba section 2 to be adapted to different uses. The outer layer 33 of the smoke section 2 consists of rubber resistant to rubber.

The structure of the scuff material shown in FIG. 7 results in increased pulse strength and increased static strength. Furthermore, the self-expansion behavior can be influenced by the structure of the foam and the flame resistance can be improved.

LIST OF REFERENCE NUMBERS

1 pipe system

2 ScAmschmmtte / RoMleitung sections

3 branch

4 connectors

5 connector body

6 connector fingers

7 first line connection

8 second line connection

9 conical surface

10 lids

11 latch

12 recess

13 rib

14 ScMauchadapter

15 outer wall

16 inner wall

17 expansion

18 sealing element (O-ring)

19 holding hammer

20 SCAmAt

21 direction of rotation

22 web surface

23 first bracket leg

24 second bracket leg

25 Direction of assembly

26 Holding direction

27 retaining lugs

28 Free space

29 stopping point (Εi

30.1 thigh protrusion

30.2 Run-up slope

31 Constriction plastic material cable connection

32 flow cross-section

33 outer jacket

34 aramid fabric

35 interior

Claims

claims

1. Plug connector (4) with a plug body (5) on which at least one line connection (7, 8) is formed, through which a liquid medium is conveyed and the plug connector (4) into a low-pressure line system (1) of an internal combustion engine is integrated, characterized in that on the at least one line connector (7, 8) a ScMauchadpater (14) is received, which has at least one ScMauchanscMuss (20) and which is fixed by means of a holding element (19) in the axial direction and freely rotatable on the at least one line connection (7, 8) is received.

2. Connector according to spoke 1, characterized in that the holding element (19) is designed as a holding chamber, the clip legs (23, 24) of which engage over the peripheral surface of the at least one line connector (7, 8) and projections (30.1) of the clip legs ( 23, 24) cling to the at least one line connector (7, 8).

3. Plug connector according to spoke 2, characterized in that the clamp legs (23, 24) have on their sides facing the at least one line connection (7) a run-up slope (30.2) pointing in the mounting direction (25).

4. Connector according spoke 1, characterized in that the ends of the clamp legs (23, 24) of the holding element (19) in the assembled state with an outer wall (15) of the ScMauchadapter (14) measure flush.

5. Connector according spoke 1, characterized in that the ScMauchadapter on its inner wall (16) has a widening to facilitate assembly (17).

6. Connector according spoke 2, characterized in that on the outside of the bracket legs (23, 24) of the holding element (29) projections (27) designed as locking lugs for fixing the holding element (19) in the ScMauchadapter (14) are formed.

7. Connector according to claim 1, characterized in that the ScMauchadapter (14) is substantially sleeve-shaped. Connector according to spoke 2, characterized in that the clamp legs (23, 24) of the holding element (19) displace plastic material of the ScMauchadapter (14) into a free space (28).