EP2896817A1 - Fuel injection system with a fuel conveying component, a fuel injector valve and a connector - Google Patents

Abstract

A connector (6) for fuel injection systems (1) is used to connect a fuel injection valve (5) with a cup (4) of a fuel-carrying component (2). The connector (6) has a connection clip (7) and a fixing element (8). The connection bracket (7) in an assembled state serves to clamp the cup (4) and the fuel injection valve (5) in order to connect the fuel injection valve (5) to the cup (4). The connecting bracket (7) and the fixing element (8) are designed so that the fixing element (8) in the assembled state, a first side part (11) and a second side part (12) of the connecting bracket (7) on an open side (83) Connecting clip (7) with each other. Further, a fuel injection system (1) is provided with such a connector (6).

Description

State of the art

The invention relates to a connector for fuel injection systems for connecting a fuel injection valve with a fuel-carrying component and a fuel injection system with such a connector. Specifically, the invention relates to the field of fuel injection systems for mixture-compression, spark-ignition internal combustion engines.

From the WO 99/61788 is a connection clip for a fuel injection valve, which is inserted in a cup of a fuel injection rail known. The connection clip is U-shaped. On the connection clip, flat elements are arranged opposite each other, which engage in the mounted state in a recess on the inlet nozzle of the fuel injector. Furthermore, the connection clip has slots which are placed on mutually remote, ear-shaped tabs on an outer side of the cup. The ear-shaped tabs of the cup then engage in the slots of the connection clip. This positions the fuel injector relative to the cup.

The from the WO 99/61788 known arrangement with the connection clip and the cup has the disadvantage that the essential for positioning and holding the fuel injector on the cup properties of the connection clip are determined by the requirements for mounting. The connection clip is made of spring steel. This must be possible for mounting a resting of the two arms of the connecting clip to put this with its slots on the ear-shaped tabs of the cups. Furthermore, the bending is also required for positioning of the fuel injector. The predetermined flexibility, which is advantageous for the assembly, but then may be too large in relation to the forces occurring during operation. In particular, the holding forces with respect to permissible movements, in particular tilting or axial displacements of the fuel injector, may be too low.

In addition, the choice of materials and the geometric design of the connection clips are limited to the effect that first of all the mounting must be ensured before aspects relating to the holding function can be considered.

Disclosure of the invention

The connector according to the invention with the features of claim 1 and the fuel injection system according to the invention with the features of claim 14 have the advantage that an improved design and optionally improved operation are possible. Specifically, both a good mountability and improved properties with respect to the holding function or connection function can be achieved.

The measures listed in the dependent claims advantageous developments of the connector specified in claim 1 and the fuel injection system specified in claim 14 are possible.

Specifically, the fuel injection system is suitable for gasoline direct injection. Furthermore, the connector is particularly suitable for fuel injection systems, which are used for gasoline direct injection. The fuel-carrying component is preferably designed as a fuel distributor, in particular as a fuel distributor strip. Such a fuel distributor can on the one hand serve to distribute the fuel to a plurality of fuel injection valves, in particular high-pressure injection valves. On the other hand, the fuel distributor can serve as a common fuel storage for the fuel injection valves. The fuel injectors are then preferably connected via corresponding connectors with the cups of the fuel distributor. During operation, the fuel injection valves then inject the fuel required for the combustion process under high pressure into the respective combustion space. The fuel is in this case compressed via a high-pressure pump and quantity-controlled conveyed via a high-pressure line in the fuel distributor.

The fuel-carrying component and the fuel injection valve are not components of the connector according to the invention. In particular, the connector according to the invention can also be manufactured and sold separately from the fuel-carrying component and a fuel injection valve.

Especially with electromagnetic high-pressure injection valves, which can be used in gasoline engines with direct injection, a conspicuous and disturbing contribution to the overall noise of the engine can be made, which can be described as a valve plug. Such a valve leakage is caused by the rapid opening and closing of the fuel injection valve, in which the valve needle is adjusted with high dynamics in the respective end stops. The impact of the valve needle in the end stops leads to short-term, but very high contact forces, which can be transmitted via a housing of the fuel injection valve to the cylinder head and the fuel-carrying component, if there is a direct contact. This then leads to the cylinder head or to the fuel component leading to a strong noise.

By means of the connector, an effective decoupling on the one hand to the cylinder head and on the other hand to the fuel-carrying component can be realized in a compact design and thus with a smaller space requirement in an advantageous manner. Furthermore, it is possible to save a separate hold-down, which for example uses a spring force, or to design it with a reduced spring force.

By mounting the fuel injector to the cup of the fuel-bearing component by means of the connector, the fuel injector can be positioned so that it is not in direct contact with the cylinder head. The required seal between the fuel injection valve and the cylinder head can be chosen independently of the suspension. Specifically, a Teflon seal can be provided between the fuel injection valve, in particular a nozzle body or a valve tip, and the cylinder head. In addition, there are great constructive freedom with respect to the seal between the fuel injection valve and the cup of the fuel component leading. Therefore, the most favorable for the particular application form of sealing can also be realized here. In operation, due to the pressure of the fuel supplied, a force acts on the fuel injector in the direction of the cylinder head. To hold the fuel injector to the cup in this case, a certain holding force is required, which is applied by the connector. The connector can be designed to be largely independent of the requirements of the assembly in an advantageous manner so that the required holding force can be applied by the connector without the fuel injection valve is adjusted too far from the predetermined mounting position. Thus, a reliable attachment of the fuel injection valve to the cup of the fuel-carrying component by means of the connector is possible.

The fixing element, which in the installed state connects the first side part of the connection clip and the second side part of the connection clip to the open side of the connection clip, ensures the desired stability of the connector after assembly. If necessary, the connection clamp can be slightly bent up for mounting. The flexibility of the connection bracket required for this does not have a reducing effect on the possible holding force. Because the holding force is applied in the assembled state of the connection bracket, which is stiffened to some extent on the fixing. For the fixing reduces a relative movement between the side parts of the connection clip, in particular a spreading of the two side parts of the connection clip can be wholly or partially restricted. Depending on the application, if necessary, a bias of the connection bracket can be specified. For this purpose, the two side parts can be acted upon each other during assembly. Subsequently, the bias can be maintained via the fixing.

It is advantageous that the connection clip is designed elastically deformable so that the first side part and the second side part are spread apart for mounting. This facilitates the assembly of the connection clip to the cup. Further, the mounting of the connection bracket to the fuel injection valve can be facilitated.

It is also advantageous that the connection clip has a middle side part which connects the first side part with the second side part. The fixing member is preferably attached opposite to the middle side member when the connection bracket is mounted. The middle side part may optionally form a stop to specify the mounting position. The first side part, the second side part and the middle side part of the connection clip can advantageously be arranged corresponding to one another in accordance with a U-shaped profile. Thus, the connection bracket can clasp the cup and the fuel injection valve in an advantageous manner, with a simple assembly is possible. The first side part and the second side part may be arranged at least approximately parallel to each other in the assembled state.

It is also advantageous that the first side part has a recess, that the second side part has a recess and that the recess of the first side part and the recess of the second side part are configured so that a collar of the cup and a collar of the fuel injection valve in mounted State at least partially extend into the recess of the first side part and at least partially in the recess of the second side part. Depending on the application, this can be between the federal government the cup and the collar of the fuel injection valve insulation may be provided, which serves for vibration damping. Thus, a structurally simple and robust design of the connector is possible.

It is also advantageous that a retaining rib is configured on the first side part, that a retaining rib is configured on the second side part, and that the fixing element can be joined to the connecting clip such that the fixing element is the retaining rib of the first side part and the retaining rib of the second part Part of the side engages behind. For assembly, the two side parts, for example, against each other, that is to each other, are applied. The fixing element can then be clipped onto the side parts, for example. If appropriate, the fixing element can also be pushed along the retaining ribs onto the side parts.

In this case, it is also advantageous that at least one stop is configured on the connection clip and / or on the fixing element, which prevents in the assembled state displacement of the fixing element relative to the connection clip in at least one direction along an axis of the cup. As a result, in the mounted state, an undesired displacement of the fixing element relative to the connection clip can be ensured over the service life. In particular, it can be prevented that, due to vibrations or the like occurring during operation, the fixing element is completely or partially released from the connection clip.

In a modified embodiment, it is advantageous that a passage opening is formed on the first side part, that on the second side part is formed a passage opening that the fixing element is at least partially configured as a pin-shaped fixing and that the fixing in the assembled state on the one hand by the Through opening of the first side part and on the other hand through the passage opening of the second side part extends. In this case, it is further advantageous that in the assembled state, the fixing element is held on the one hand via a securing element on the first side part and the fixing element on the other hand is held by a head of the fixing or a further securing element on the second side part. After mounting the connection bracket, the fixing element is pushed in this embodiment, for example, from one side through the passage openings of the side parts. Then, a backup of the fixing takes place on the connection bracket. This may optionally also be provided a bias between the side parts of the connection bracket. In the assembled state, the connection clip is then stabilized by the fixing. A release of the fixing element is reliably prevented by virtue of its arrangement and the securing over the at least one securing element.

It is advantageous here, too, that the securing element is designed as a separate locking ring. The securing element can then be applied in a suitable manner to the fixing element. For example, the securing element can be configured as a spreading or clamping ring. In a modified embodiment, the securing element can be formed in an advantageous manner by at least one clamping lug configured on the fixing element. As a result, a simple installation of the fixing is possible. In a corresponding manner, the further securing element can be configured. In this case, the securing element and the further securing element can be configured in the same way or differently.

In a further possible embodiment, it is advantageous that the passage opening of the first side part is designed as a slot-shaped passage opening and that the fixing element on the one hand has a leaf-shaped end portion which is designed such that this for mounting through the passage opening of the second side part and through the slot-shaped passage opening of the first side part is feasible and in a rotated state of the fixing element, the first side part engages behind the slot-shaped passage opening. This makes a simple mounting of the fixing by pushing in and twisting possible.

Furthermore, it is advantageous that the fixing element can be screwed to the passage opening of the first side part with the first side part and / or that the fixing element can be screwed to the passage opening of the second side part with the second side part. Thus, a screw connection can be realized on at least one side part.

In a further possible embodiment, it is advantageous that an open recess is formed on the first side part, that an open recess is formed on the second side part, that the fixing element is formed as a bent fixing element with a first end portion, a middle portion and a second end portion is that the central portion of the fixing element in the assembled state in the open recess of the first side part and in the open recess of the second side part can be inserted and that the fixing element with its first end portion in the first side part suspended and with its second end portion in the second side part can be hung. Here, it is also advantageous that the fixing element can be suspended with its first end portion in a recess of the first side part and with its second end portion in a recess of the second side part can be suspended. At a modified embodiment, it is advantageous that the fixing element with its first end portion in a recess which is provided on the first side part, is suspended and with its second end portion in a recess which is provided on the second side part, can be suspended. As a result, on the one hand, an advantageous mounting of the fixing element is made possible even in unfavorable space conditions. In addition, a desired elasticity of the fixing element can be specified in this way.

Brief description of the drawings

• Fig. 1 eine Brennstoffeinspritzanlage mit einem Verbinder entsprechend einem ersten Ausführungsbeispiel der Erfindung in einer auszugsweisen, schematischen, räumlichen Darstellung;
• Fig. 2 die in Fig. 1 dargestellte Brennstoffeinspritzanlage entsprechend dem ersten Ausführungsbeispiel der Erfindung in einer auszugsweisen, schematischen Schnittdarstellung;
• Fig. 3 eine Brennstoffeinspritzanlage mit einem Verbinder entsprechend einem zweiten Ausführungsbeispiel der Erfindung in einer auszugsweisen, schematischen, räumlichen Darstellung;
• Fig. 4 die in Fig. 3 dargestellte Brennstoffeinspritzanlage entsprechend dem zweiten Ausführungsbeispiel der Erfindung in einer auszugsweisen, schematischen Schnittdarstellung;
• Fig. 5 eine Brennstoffeinspritzanlage mit einem Verbinder entsprechend einem dritten Ausführungsbeispiel der Erfindung in einer auszugsweisen, schematischen, räumlichen Darstellung;
• Fig. 6 eine Brennstoffeinspritzanlage mit einem Verbinder entsprechend einem vierten Ausführungsbeispiel der Erfindung in einer auszugsweisen, schematischen Darstellung;
• Fig. 7 eine Brennstoffeinspritzanlage mit einem Verbinder entsprechend einem fünften Ausführungsbeispiel in einer auszugsweisen, schematischen, räumlichen Darstellung;
• Fig. 8 eine Brennstoffeinspritzanlage mit einem Verbinder entsprechend einem sechsten Ausführungsbeispiel in einer auszugsweisen, schematischen, räumlichen Darstellung;
• Fig. 9 eine Brennstoffeinspritzanlage mit einem Verbinder entsprechend einem siebten Ausführungsbeispiel der Erfindung in einer auszugsweisen, schematischen, räumlichen Darstellung;
• Fig. 10 eine Brennstoffeinspritzanlage mit einem Verbinder entsprechend einem achten Ausführungsbeispiel der Erfindung in einer auszugsweisen, schematischen, räumlichen Darstellung;
• Fig. 11 einen Verbinder entsprechend einem neunten Ausführungsbeispiel der Erfindung in einer schematischen, räumlichen Darstellung vor einer Montage;
• Fig. 12 einen Verbinder entsprechend einem zehnten Ausführungsbeispiel der Erfindung in einer schematischen, räumlichen Darstellung vor einer Montage;
• Fig. 13 einen Verbinder entsprechend einem elften Ausführungsbeispiel der Erfindung in einer schematischen, räumlichen Darstellung vor einer Montage;
• Fig. 14 einen Verbinder entsprechend einem zwölften Ausführungsbeispiel der Erfindung in einer schematischen, räumlichen Darstellung vor einer Montage und
• Fig. 15 eine Brennstoffeinspritzanlage in einer schematischen Darstellung entsprechend einer möglichen Ausgestaltung der Erfindung.

Preferred embodiments of the invention are explained in more detail in the following description with reference to the accompanying drawings, in which corresponding elements are provided with identical reference numerals. Show it:

• Fig. 1 a fuel injection system with a connector according to a first embodiment of the invention in an excerpt, schematic, spatial representation;
• Fig. 2 in the Fig. 1 illustrated fuel injection system according to the first embodiment of the invention in a partial, schematic sectional view;
• Fig. 3 a fuel injection system with a connector according to a second embodiment of the invention in a partial, schematic, spatial representation;
• Fig. 4 in the Fig. 3 illustrated fuel injection system according to the second embodiment of the invention in a partial, schematic sectional view;
• Fig. 5 a fuel injection system with a connector according to a third embodiment of the invention in a partial, schematic, spatial representation;
• Fig. 6 a fuel injection system with a connector according to a fourth embodiment of the invention in an abstract, schematic representation;
• Fig. 7 a fuel injection system with a connector according to a fifth embodiment in a partial, schematic, spatial representation;
• Fig. 8 a fuel injection system with a connector according to a sixth embodiment in an excerpt, schematic, spatial representation;
• Fig. 9 a fuel injection system with a connector according to a seventh embodiment of the invention in an excerpt, schematic, spatial representation;
• Fig. 10 a fuel injection system with a connector according to an eighth embodiment of the invention in an excerpt, schematic, spatial representation;
• Fig. 11 a connector according to a ninth embodiment of the invention in a schematic, spatial representation prior to assembly;
• Fig. 12 a connector according to a tenth embodiment of the invention in a schematic, spatial representation prior to assembly;
• Fig. 13 a connector according to an eleventh embodiment of the invention in a schematic, spatial representation prior to assembly;
• Fig. 14 a connector according to a twelfth embodiment of the invention in a schematic, spatial representation before assembly and
• Fig. 15 a fuel injection system in a schematic representation according to a possible embodiment of the invention.

Embodiments of the invention

Fig. 1 shows a fuel injection system 1 with a fuel-carrying component 2, which has a tubular body 3 and a cup 4, a fuel injection valve 5 and a connector 6. The connector 6 serves to connect the fuel injection valve 5 with the cup 4 of the component 2. The fuel leading Component 2 may be formed as a fuel distributor 2, in particular fuel distributor strip 2. Here, the component 2 can be used for storing and distributing the fuel to a plurality of fuel injection valves 5, 5A, 5B, as also shown of the Fig. 15 is described. The connector 6 is particularly suitable for such fuel-carrying components. 2

The connector 6 has a connection bracket 7 and a fixing element 8. About the connector 6, the fuel injection valve 5 is fixed to the cup 4. In this case, a direct contact between the fuel injection valve 5 and the cup 4 can be avoided by, for example, an insulating element between the fuel injection valve 5 and the cup 4 is inserted. Such an insulating element can also take over the function of a sealing element.

The configuration and operation of the connector 6 is below with reference to the Fig. 2 further described.

Fig. 2 shows the in Fig. 1 illustrated fuel injection system 1 according to the first embodiment in a partial, schematic sectional view. The cup 4 has a collar 9. Furthermore, the fuel injection valve 5 has a collar 10. The connecting bracket 7 of the connector 6 has a first side part 11 and a second side part 12 and a middle side part 13. The middle side part 13 connects the first side part 11 with the second side part 12. Here, the side parts 11, 12, 13 of the connection bracket 7 corresponding to a U-shaped profile 11, 12, 13 arranged to each other. The first side part 11 and the second side part 12 are arranged parallel to one another in the mounted state.

The first side part 11 has a recess 14. Furthermore, the second side part 12 has a recess 15 (FIG. Fig. 5 ) on.

The recess 14 of the first side part 11 and the recess 15 of the second side part 12 are configured so that the collar 9 of the cup 4 and the collar 10 of the fuel injection valve 5 in the mounted state, at least partially in the recess 14 and at least partially in the recess 15th extend. This includes the case that the collar 9 of the cup 4 and the collar 10 of the fuel injection valve 5 in the assembled state partly over an outer side 16 of the first side part 11 and / or beyond an outer side 17 of the second side part 12 and thus by the Recess 14 and the recess 15 extend. Furthermore, in the middle side part 13, a corresponding recess 18 (FIG. Fig. 11 Be configured in which the collar 9 of the cup 4 and the collar 10 of the fuel injection valve 5 at least partially extend.

For assembly, the connecting bracket 7 may be slightly spread apart, wherein the first side part 11 and the second side part 12 are spread apart for mounting. The connecting bracket 7 is designed elastically deformable. As a result, the assembly is facilitated. Furthermore, the degree of elastic deformability of the connection bracket 7 can be adapted to the requirements of the assembly.

After mounting the connecting bracket 7, the fixing member 8 is attached to the connecting bracket 7. This results in a stiffener. Thus, the elasticity of the connector 6 in the assembled state can be specified much lower than the elasticity of the open connection bracket 7. In this way, large holding forces can be applied by the connector 6 in operation. Thus, in the supply of fuel under high pressure in particular an adjustment of the fuel injection valve 5 along a longitudinal axis (axis) 19 of the cup 4 and the fuel injection valve 5 can be minimized. As a result, contact of the fuel injection valve 5 with a cylinder head or other component of the internal combustion engine is reliably prevented. The fuel injection valve 5 is then only indirectly connected via a seal, in particular a Teflon seal, with the cylinder head. Such a Teflon seal may be provided in a region 20 at a valve tip 21 of the fuel injection valve 5.

For assembly, the connecting bracket 7 can be applied, for example, in a mounting direction 22 on the collar 9 of the cup 4 and the collar 10 of the fuel injection valve 5. Then, the first side part 11 can be acted upon in a direction 23, while the second side part 12 is acted upon in a direction 24. The directions 23, 24 are in this case opposite to each other. Thus, the connection bracket 7 is compressed at the side parts 11, 12. Subsequently, the fixing element 8 can be joined in a mounting direction 25 on retaining ribs 26, 27 of the connecting clip 7. Subsequently, the forces acting in the directions 23, 24 on the side parts 11, 12 assembly forces can be reduced again. The fixing element 8 is then connected to the connecting bracket 7. In this embodiment, the fixing element 8 engages in the mounted state, on the one hand, the retaining rib 26 of the first side part 11 and on the other hand the retaining rib 27 of the second side part 12. The retaining ribs 26, 27 are configured for this purpose on the side parts 11, 12.

On the first side part 11, a stop lug 28 is configured, which forms a stop 28. The stop 28 prevents in the assembled state, a displacement of the fixing element 8 relative to the connecting bracket 7 in a direction 29 along the Longitudinal axis 19 of the cup 4. On the second side part 12, a corresponding stop can be configured. Further, at least one of the side parts 11, 12, a further stop can be configured, which prevents a fixation of the fixing element 8 relative to the connecting bracket 7 in a direction 30, which is oriented opposite to the direction 29 along the longitudinal axis 19.

In this embodiment, the fixing element 8 can be clipped onto the connecting clip 7. Here, depending on the application, a latching mechanism can be realized, in which optionally alone by applying the fixing element 8 in the mounting direction 25, the bending of the side parts 11, 12 in the respective direction 23, 24 takes place.

Fig. 3 shows a fuel injection system 1 with a connector 6 according to a second embodiment in a partial, schematic, spatial representation. The tubular base body 3 is not shown here for the sake of simplicity of illustration. The cup 4 of the fuel-carrying component 2 has an axial bore 35, via which fuel can be guided from the tubular base body 3 into an interior of the cup 4 and from there into the fuel injection valve 5 during operation. In this embodiment, the connection bracket 7 is applied in the mounting direction 22. Further, the side parts 11, 12 of the connecting bracket 7 in the respective direction 23, 24 are applied. However, the mounting direction 25 is oriented for the fixing element 8 in this case along the longitudinal axis 19. Furthermore, a stop element 36 is configured on the fixing element 8, which is designed as a metal strip 36, in particular metal strip flange 36. The metal strip flange 36 is profiled to accommodate mainly bending loads. The stop element 36 partially engages in the recess 14 of the first side part 11. This blocks movement of the fixing element 8 in the direction 29 along the longitudinal axis 19 in the mounted state. In this case, a movement in the direction 30 along the longitudinal axis 19 can be blocked.

Fig. 4 shows the in Fig. 3 illustrated fuel injection system 1 according to the second embodiment in a partial, schematic sectional view. On the fixing element 8, a further stop element 37 is provided which engages in the recess 15 of the second side part 12 partially. The stopper member 37 also blocks movement of the fixing member 8 relative to the connection bracket 7 in the direction 29 when the connector 6 is mounted. In this case, a mobility of the fixing element 8 in the direction 30 may be blocked. The stop element 37 may be formed as a metal strip 37, in particular metal strip flange 37.

The axial mounting of the fixing element 8 in the mounting direction 25 is advantageous for an embodiment of the fuel injection system 1, in which the cup 4 is not disposed directly under the tubular body 3, as shown in the Fig. 1 is shown, but is connected, for example via an angle element to the tubular body, so that the corresponding space for mounting the fixing element 8 is made.

Thus, the fuel injection valve 5 can be held on the cup 4 via the connector 6. As a result, the fuel injection valve 5 does not directly rest on a cylinder head of an internal combustion engine or the like. In particular, only indirect contact can exist via a Teflon compound or the like. As a result, vibrations are effectively damped and noise reduction is achieved. In this case, a suitable mounting direction 25 can be selected for the fixing element 8 with respect to the respective application, as for example with reference to FIG Fig. 1 to 4 is described.

Fig. 5 shows a fuel injection system 1 with a connector 6 according to a third embodiment in a partial, schematic, spatial representation. In this embodiment, the fixing element 8 is configured as a pin-shaped fixing element 8. The fixing element 8 has a rod-shaped middle part 40 and ends 41, 42. The end 41 has a rectangular cross section and thus a rectangular end face 43. Accordingly, the end 42 may have a rectangular and optionally also square cross-section.

For assembly, the fuel injection valve 5 is inserted into the cup 4. Then, the connection bracket 7 is mounted in the mounting direction 22. Subsequently, the connecting bracket 7 is acted upon at its side parts 11, 12 in the directions 23, 24. In the acted state, in which the side parts 11, 12 are pressed against each other, the fixing element 8 is mounted.

For mounting the fixing element 8 to the connecting bracket 7, the fixing element 8 is preceded by its rectangular end face 43 through a through hole 44 of the second side part 12, which has a rectangular cross section, and then through a through hole 45 of the first side part 11, which has a rectangular cross section , guided. The connecting element 8 is thus guided in a mounting direction 46 through the through holes 44, 45. Subsequently, the fixing element 8 is rotated in a direction of assembly 47. This rotation can be done for example by 90 °. Then the loading of the two side parts 11, 12 is canceled against each other. The fixing element 8 is now fixed in its mounted position. The fixing element 8 can now due to the previously applied bias the side members 11, 12 press something against each other or be acted upon at its ends 41, 42 of the bias of the connection bracket 7.

In the mounted state, the fixing element 8 thus extends on the one hand through the through-opening 45 of the first side part 11 and on the other hand through the through-opening 44 of the second side part 12. The end 41 can generally be configured as a leaf-shaped end section 41. The end 42 may also be configured as a leaf-shaped end portion 42, as a head 42 or the like. In the rotated state, the leaf-shaped end section 41 of the fixing element 8 engages behind the first side part 11 at the slot-shaped through-opening 45. The through-opening 44 can likewise be designed as a slot-shaped through-opening 44.

Fig. 6 shows a fuel injection system 1 with a connector 6 according to a fourth embodiment in a partial, schematic representation. In this embodiment, the fixing element 8 is designed as a pin-shaped fixing element 8 in sections. The fixing element 8 has a rod-shaped middle part 40. Furthermore, the fixing element 8 has a bent end 42, which has a larger diameter than the rod-shaped central part 40. Further, 8 fuse elements 48, 49 in the form of clamping lugs 48, 49 are configured at the end 41 of the fixing. Specifically, three such clamping lugs 48, 49 may be provided at the end 41 of the fixing element 8. For assembly, the fixing element 8 is guided through passage openings 44, 45 of the connection clip 7. Here, on the one hand, the clamping lugs 48, 49 engage on the outside 16 of the first side part 11 in accordance with a clamping connection. Furthermore, a stop on the outer side 17 of the second side part 12 is formed by the bent end 42 of the fixing element 8, which has an enlarged diameter or cross section. As a result, a simple installation of the fixing element 8 is made possible on the connection bracket 7.

Fig. 7 shows a fuel injection system 1 with the connector 6 according to a fifth embodiment in an excerpt, schematic, spatial representation. In this exemplary embodiment, a holding groove 50 which extends parallel to the longitudinal axis 19 is configured on the first side part 11. Furthermore, on the second side part 12, a retaining groove 51 is provided, which extends parallel to the longitudinal axis 19. Further, the fixing element 8 is configured in this embodiment as a bracket 8. The headband 8 is fügbar on the connection bracket 7, that the headband 8 on the one hand engages in the retaining groove 50 of the first side part 11 and on the other hand in the retaining groove 51 of the second side part 12. For this purpose, the headband 8 may initially be set slightly spaced from the holding grooves 50, 51 in an assembly direction 25 on the connecting bracket 7. Subsequently, the headband 8 can be pressed in a mounting direction 52 in the holding grooves 50, 51, whereby the headband 8 locks and is fixed. In this embodiment, the headband 8 by 90 ° bent corners 53, 54 and bent ends 41, 42. The bent-over ends 41, 42 prevent movement of the retaining clip 8 relative to the connecting clip 7 in a direction 29. Furthermore, a movement of the retaining clip 8 relative to the connecting clip 7 in the direction 30 is blocked via the bent corners 53, 54. This embodiment can be used, for example, in a case in which the cup 4 is radially offset to the tubular base body 3 is mounted. As a result, the assembly of the retaining clip 8 in the mounting direction 25 is possible.

For mounting the side parts 11, 12 can also be biased against each other, wherein the biasing forces in the directions 23, 24 can be applied, as in a corresponding manner, inter alia, with reference to Fig. 2 is described.

Fig. 8 shows a fuel injection system 1 with a connector 6 according to a sixth embodiment in an excerpt, schematic, spatial representation. In this embodiment, the fixing element 8 is configured as a pin-shaped fixing element 8, which has a thread extending from the end 41 via the rod-shaped central part 40. Furthermore, the fixing element 8 has an end 42 configured as a head 42. In this embodiment, the head 42 is designed with a hexagon socket to allow screwing of the fixing element 8 in the connection bracket 7 in a direction of assembly rotation 47. Thus, in this embodiment, the fixing element 8 can be screwed to the through-opening 45 of the first side part 11 with the first side part 11 of the connection clip 7 and / or on the through-opening 44 of the second side part 12 with the second side part 12 of the connection clip 7. In a modified embodiment, a nut can be screwed onto the end 41.

During assembly, the side parts 11, 12 can first be acted upon in the respective direction 23, 24 in order to bias the connecting clip 7. Subsequently, the fixing element 8 can be screwed. As a result, a bias voltage can be maintained in the screwed state.

In the assembled state, therefore, the connecting bracket 7 is reliably fixed to the cup 4 and the fuel injection valve 5 inserted into the cup 4. A mobility of the connecting bracket 7 and the connector 6 relative to the cup 4 and the fuel injection valve 5 is effectively limited.

Fig. 9 shows a fuel injection system 1 with a connector 6 according to a seventh embodiment in an excerpt, schematic, spatial representation. In this embodiment, end portions 55, 56 are formed on the rod-shaped central part 40, at which the diameter increases and which merge into the ends 41, 42. A diameter of the end portions 55, 56 is in this case adapted to the inner diameter of the passage openings 44, 45. Since the remaining center portion 40 has a reduced diameter relative to the end portions 55, 56, the assembly is simplified. Further, securing elements 57, 58 are attached to the ends 41, 42, which fix the rod-shaped fixing element 8 to the side parts 11, 12 of the connection clip 7. The securing elements 57, 58 can for example be screwed or clipped. Further, in a modified embodiment also at only one of the ends 41, 42, a securing element 57, 58 may be provided, while at the other end 41, 42 then a head is configured.

Fig. 10 shows a fuel injection system 1 with a connector 6 according to an eighth embodiment in a partial, schematic, spatial representation. In this embodiment, the fixing element 8 is designed as a rod-shaped fixing element 8 with a smooth rod-shaped central part 40. The end 42 of the fixing element 8 is in this case formed as a head 42. Furthermore, a securing element 57 is provided at the end 41 of the fixing element 8. The securing element 57 is in this case configured as a clip-on securing ring 57. For this purpose, the clip-on securing ring 57 is designed to be part-ring-shaped, as a result of which mounting in a mounting direction 59 is possible when the end 41 of the fixing element 8 is arranged in the illustrated position.

For mounting, the fixing element 8 can thus first be guided in the mounting direction 46 through the passage openings 44, 45 of the connection clip 7. Subsequently, if necessary, a loading of the side parts 11, 12 take place against each other. Then, the locking ring 57 can be applied in the mounting direction 59 on the end 41 of the fixing element 8.

In a modified embodiment, a securing element 58 can also be attached to the end 42, which according to the in the Fig. 10 illustrated circlip 57 is configured and can be mounted. Thus, in such a modified embodiment at both ends 41, 42 as a securing ring 57, 58 ausgestaltetes securing element 57, 58 are attached.

Fig. 11 shows a connector 6 according to a ninth embodiment in a schematic, spatial representation prior to assembly. The connector 6 has the connection bracket 7 and the fixing member 8. The first side part 11 of the connection clip 7 has the recess 14, which lies opposite the recess 15 of the second side part 12. Furthermore, the recess 18 is provided on the middle side part 13. For supporting the fuel injection valve 5 on the connecting bracket 7, 13 contact surfaces 65, 66, 67 are in the region of the recesses 14, 15, 18 on the side parts 11, 12, configured. Thus, an optimized support of the fuel injection valve 5 on the connection bracket 7 of the connector 6 is possible.

The fixing element 8 is formed in this embodiment as a bent fixing element 8 with a first end portion 55, a central portion 40 which is configured as a rod-shaped central part 40, and a second end portion 56. Furthermore, the first side part 11 has an open recess 68. In addition, the second side part 12 has an open recess 69. On the first side part 11, a recess 70 is formed. Further, a recess 71 is formed on the second side part 12. When mounting the fixing element 8 to the connecting bracket 7, the end portion 55 is hooked with its end face 72 in the recess 70 of the first side part 11. Furthermore, the second end portion 56 is suspended with its end face 73 in the recess 71 of the second side part 12. In addition, in the assembled state, the middle portion 40 of the fixing element 8 is inserted into the open recess 68 of the first side part 11 and into the open recess 69 of the second side part 12.

During assembly, the side parts 11, 12 are preferably applied against each other, while the fixing element 8 is attached to the connecting bracket 7.

Fig. 12 shows a connector 6 according to a tenth embodiment in a schematic, spatial representation prior to assembly. In this embodiment, the connecting bracket 7 is first joined to the cup 4 and attached to the cup 4 fuel injection valve 5. Subsequently, the side parts 11, 12 are acted upon in the directions 23, 24 against each other. Then, the fixing member 8 is applied to the connecting bracket 7 in the mounting direction 25. Here, the fixing element 8 with its bent end portions 55, 56 in the recesses 14, 15 of the side parts 11, 12 mounted. Further, the middle portion 40 in the open Recesses 68, 69 inserted. The applied bias of the connecting bracket 7 may then continue at least partially in the assembled state.

Fig. 13 a connector according to an eleventh embodiment in a schematic, spatial representation prior to assembly. In this embodiment, bulges 74, 75 are configured at the end sections 55, 56. The bulges 74, 75 are configured in this embodiment by corresponding bending at the end portions 55, 56. When mounting the fixing element 8 to the connecting bracket 7, the end portions 55, 56 are hung with their bulges 74, 75 in the recesses 70, 71 on the side parts 11, 12. In this case, the middle section 40 of the fixing element 8 is inserted into the open recesses 68, 69 of the side parts 11, 12. The assembly takes place here essentially in the mounting direction 25th

Fig. 14 shows a connector 6 according to a twelfth embodiment in a schematic, spatial representation prior to assembly. In this embodiment, the fixing element 8 is mounted on its end faces 72, 73 of the end portions 55, 56 in recesses 70, 71 of the side parts 11, 12. In this case, the fixing element 8 can be guided at least substantially in the mounting direction 25 to the connecting bracket 7. Subsequently, the hinged with its end portions 55, 56 in the recesses 70, 71 of the side parts 11, 12 fixing in an assembly direction of rotation 76 is rotated until the central portion 40 is inserted into the open recesses 68, 69. In order to allow a latching in this case the fixing element 8 at its end portions 55, 56 something from the recesses 70, 71 are lifted. As a result, the middle section 40 passes over edges 77, 78 at the open recesses 68, 69 of the side parts 11, 12.

Thus, the fixing element 8 may be formed in the respective application as at least approximately U-shaped configured fixing 8.

Fig. 15 shows a fuel injection system 1 in a schematic representation according to a possible embodiment of the invention. The fuel-carrying component 2 has the tubular body 2 and cups 4, 4A, 4B. The tubular body 3 serves to store and distribute fuel to fuel injection valves 5, 5A, 5B mounted on the cups 4, 4A, 4B. The component 2 can thus be designed as a fuel distributor 2, in particular fuel distributor strip 2, which serves for storing fuel and for distributing the stored fuel to a plurality of fuel injection valves 5, 5A, 5B of the fuel injection system 1. The number of fuel injection valves 5, 5A, 5B is chosen here in relation to the particular application. Optionally, a plurality, in particular two, tubular body 3 may be provided to allow a division of the fuel to each other opposed rows of cylinders of an internal combustion engine.

The fuel injection system 1 has a tank 80 and a high-pressure pump 81. If appropriate, a prefeed pump may also be provided here. Further, a pressure relief valve 82 is provided to limit the pressure of the pumped into the base body 3 fuel.

The fuel injection valves 5, 5A, 5B are connected to the cups 4, 4A, 4B of the component 2 via connectors 6, 6A, 6B. The connectors 6, 6A, 6B are preferably of the same design here. Possible embodiments of the connectors 6, 6A, 6B are based on the Fig. 1 to 14 described in detail.

Thus, through a connector 6, 6A, 6B advantageously a connection of a fuel injection valve 5, 5A, 5B with the respective cup 4, 4A, 4B take place. Here, the connection bracket 7 of the connector 6, the cup 4 and the fuel injection valve 5 partially clasped. For attaching the connecting bracket 7, an open side 83 is provided on the connecting bracket 7. Thus, the connection bracket 7 can be mounted with the open side 83 ahead of the cup 4 and the cup 4 in the fuel injection valve 5 in the region of the collars 9, 10 of the cup 4 and the fuel injection valve 5. Subsequently, the fixing element 8 is mounted on the connection bracket 7. In the assembled state, the fixing element 8 connects the first side part 11 of the connection clip 7 to the second side part 12 of the connection clip 7 on the open side 83. This ensures a high stability of the connection clip 7. An optionally required for the installation, relatively large flexibility of the connecting bracket 7 then does not adversely affect the possible holding power, as to a certain extent a stiffening is achieved via the fixing element 8.

The invention is not limited to the described embodiments.

Claims (14)

A connector (6) for fuel injection systems (1) for connecting a fuel injection valve (5) to a cup (4) of a fuel-carrying component (2), wherein a connection clip (7) is provided, which in an assembled state for at least partially clasping the cup (4) and the fuel injection valve (5) serves to connect the fuel injection valve (5) with the cup (4),
characterized,
in that at least one fixing element (8) is provided and that the connecting clip (7) and the fixing element (8) are configured so that the fixing element (8) in the mounted state comprises a first side part (11) of the connecting clip (7) and a second side part (12) of the connecting bracket (7) on an open side (83) of the connecting bracket (7) interconnected. Connector according to claim 1,
characterized,
in that the connecting clip (7) is designed to be elastically deformable such that the first side part (11) and the second side part (12) can be spread apart for mounting. Connector according to claim 1 or 2,
characterized,
in that the connecting clip (7) has a middle side part (13) which connects the first side part (11) to the second side part (12), and / or
in that the side parts (11, 12, 13) of the connection clip are arranged corresponding to one another in a U-shaped profile (11, 12, 13) and / or
that the first side part (11) and the second side part (12) are arranged in the mounted state at least approximately parallel to each other and / or
in that the first side part (11) has a recess (14), that the second side part (12) has a recess (15), and that the recess (14) of the first side part (11) and the recess (15) of the second side part (11). 12) are configured so that a collar (9) of the cup (4) and a collar (10) of the fuel injection valve (5) in the assembled state at least partially in the recess (14) of the first side part (11) and at least partially in the recess (15) of the second side part (12) extend. Connector according to one of claims 1 to 3,
characterized,
in that a holding rib (26) is configured on the first side part (11), that a holding rib (27) is configured on the second side part (12), and that the fixing element (8) can be placed on the connecting clamp (7) Fixing element (8) on the one hand engages behind the retaining rib (26) of the first side part (11) and on the other hand, the retaining rib (27) of the second side part (12),
or
in that a holding groove (50) is configured on the first side part (11), that a holding groove (51) is configured on the second side part (12), that the fixing element (8) is designed as a holding bracket (8) and that the retaining clip (8) 8) can be added to the connecting clip (7) so that the retaining clip (8) engages on the one hand in the retaining groove (50) of the first side part (11) and on the other hand in the retaining groove (51) of the second side part (12). Connector according to claim 4,
characterized,
in that at least one stop (28, 36, 37) is configured on the connecting clip (7) and / or on the fixing element (8), which in the mounted state displaces the fixing element (8) relative to the connecting clip (7) in at least one of them Direction (29, 30) along an axis (19) of the cup (4) prevented. Connector according to one of claims 1 to 3,
characterized,
in that a passage opening (45) is formed on the first side part (11) such that a passage opening (44) is formed on the second side part (12) such that the fixing element (8) is designed at least in sections as a pin-shaped fixing element (8) and the fixing element (8) in the assembled state extends on the one hand through the passage opening (45) of the first side part (11) and on the other hand through the passage opening (44) of the second side part (12). Connector according to claim 6,
characterized,
that in the assembled state, the fixing element (8) on the one hand via a securing element (57) is held on the first side part (11) and / or the fixing element (8) on the other hand via a head (42) of the fixing element (8) or via a further securing element (58) is held on the second side part (12). Connector according to claim 7,
characterized,
in that the securing element (57) is designed as a separate securing ring (57) or in that the securing element (57) is formed by at least one clamping nose (48, 49) formed on the fixing element (8) and / or in that the further securing element (58) separate retaining ring (58) is configured or that the further securing element (58) by at least one of the fixing element (8) configured clamping nose is formed. Connector according to claim 6,
characterized,
in that the through opening (45) of the first side part (11) is configured as a slot-shaped passage opening (45), that the fixing element (8) on the one hand has a leaf-shaped end section (41) which is designed such that it can be mounted through the passage opening (44 ) of the second side part (12) and through the slot-shaped passage opening (45) of the first side part (11) can be guided and in a rotated state of the fixing element (8), the first side part (11) engages behind the slot-shaped passage opening (45). A connector according to any of claims 6 to 9,
characterized,
in that the fixing element (8) can be screwed to the first side part (11) at the through opening (45) of the first side part (11) and / or that the fixing element (8) engages with the through opening (44) of the second side part (12) second side part (12) can be screwed. Connector according to one of claims 1 to 3,
characterized,
in that an open recess (68) is formed on the first side part (11) such that an open recess (69) is formed on the second side part (12) such that the fixing element (8) has a bent fixing element (8) with a first end section (55), a middle portion (40) and a second end portion (56) is formed, that the central portion (40) of the fixing element (8) in the assembled state in the open recess (68) of the first side part (11) and in the open recess (69) of the second side part (12) can be inserted and that the fixing element (8) can be suspended with its first end section (55) in the first side part (11) and with its second end section (56) in the second side part (12 ) can be suspended. Connector according to claim 11,
characterized,
in that the fixing element (8) can be suspended with its first end section (55) in a recess (14) of the first side part (11) and with its second end section (56) in a recess (15) of the second side part (12) can be suspended. Connector according to claim 11,
characterized,
in that the fixing element (8) can be suspended with its first end section (55) into a recess (70) provided on the first side section (11) and with its second end section (56) into a recess (71) attached to the first section second side part (12) is provided, can be suspended. Fuel injection system (1), in particular for mixture-compression, spark-ignited internal combustion engines, having at least one fuel-carrying component (2) which has at least one cup (4, 4A, 4B), at least one fuel injection valve (5, 5A, 5B) and at least one connector ( 6, 6A, 6B) according to one of claims 1 to 13, wherein the fuel injection valve (5, 5A, 5B) via the connector (6, 6A, 6B) with the cup (4, 4A, 4B) of the fuel-carrying component (2 ) connected is.

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