EP3042068A1

EP3042068A1 - Holding device for fastening a fuel distributor to a combustion engine

Info

Publication number: EP3042068A1
Application number: EP14736744.5A
Authority: EP
Inventors: Marc Spinner; Andreas Rehwald
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2013-09-03
Filing date: 2014-07-03
Publication date: 2016-07-13
Also published as: KR102237653B1; EP3536946B1; CN105518288A; KR20160051768A; CN105518288B; US20160208760A1; EP3536946A1; PL3536946T3; DE102013217538A1; US9863388B2; WO2015032522A1

Abstract

A holding device (2) serves to fasten a fuel distributor (3) to a combustion engine. A plurality of holding elements (11, 12, 13) is provided which can be fastened to the combustion engine by means of fastening means. In addition, a cable guide (14) is provided. The holding elements (11, 12, 13) are connected to the cable guide (14). A system (1) having such a holding device (2) and a fuel distributor (3), which serves to conduct fuel, are also described.

Description

Description title

Holding device for fastening a fuel distributor to an internal combustion engine prior art

The invention relates to a holding device for fastening a component,

in particular a fuel distributor, on an internal combustion engine. Specifically, the invention relates to the field of fuel injection systems of internal combustion engines, with high pressure fuel injectors associated with fuel injectors

Combustion chambers of the internal combustion engine is injected.

From US 7,591,246 B2 a fuel supply system with multiple holders is known. The single holder has a first holder portion and a second holder portion, both of which cooperate to detachably connect a fuel rail to a fuel rail

Connect cylinder head. Here, a fastening screw is provided, which is the

Screw holder parts to the cylinder head.

The fuel supply system known from US Pat. No. 7,591,246 B2 has the disadvantage that the space required for the wiring of the fuel injection valves is limited by the holders. Care must also be taken during installation to prevent damage to the electrical wiring in the area of the holders.

Disclosure of the invention

The holding device according to the invention with the features of claim 1 and the arrangement according to the invention with the features of claim 9 have the advantage that an improved design is possible. In particular, the wiring of the fuel injection valves can be improved and a reliable protection against damage can be ensured. The measures listed in the dependent claims advantageous refinements of the claim 1 holding device and the arrangement specified in claim 9 are possible. The holding device is preferably used for fastening a fuel distributor of a fuel injection system to a cylinder head of the internal combustion engine. The

However, holding device can also serve to attach another component to the internal combustion engine. Furthermore, the attachment to the internal combustion engine can also be carried out indirectly via one or more intermediate pieces. The component, in particular the fuel distributor, and the internal combustion engine are not part of the

Holding device according to the invention. However, embodiments are conceivable in which one or more parts of the holding device are integral components of the component and / or in which on the internal combustion engine, in particular a cylinder head, a suitable counterpart for securing, in particular screwing, the

Fastener is formed.

The fuel distributor, the one or more holding elements on the

Internal combustion engine can be fastened, is used during operation as a fuel storage. By

Pressure fluctuations in the fuel rail and fuel injectors connected to the fuel rail produce pressure pulsations that may cause noise. For damping such pressure pulsations, it is advantageous that the holding element has a first half-shell and a second half-shell, that at least one elastic rib is provided on a holding region of the first half-shell and that at least one elastic rib is provided on a holding region of the second half-shell, wherein the elastic rib, which is provided on the holding portion of the first half-shell, and the elastic rib, which is provided on the holding portion of the second half-shell, circumferentially enclose a tubular body of the fuel distributor. The elastic ribs may in this case be formed from a viscoelastic material. Thus, an effective damping of vibrations is possible by

Pressure pulsations arise.

The fuel distributor can serve depending on the application for gasoline or diesel systems in the high or low pressure range and for this purpose may be suitably adapted. However, the fuel distributor can also be used for other fuels, in particular gaseous fuels. Furthermore, the component may also be for others

Use cases serve. For example, the component can also be used for

Cooling water supply for engines of hybrid vehicles serve. It is advantageous that a plurality of holding elements are provided, that the holding elements to each other objected to the cable guide are arranged and that the holding elements are at least indirectly connected to the cable guide. As a result, a reliable attachment of the cable guide to the internal combustion engine is possible. The cable guide and the fuel distributor are thereby also defined with respect to the internal combustion engine positioned. Via the cable guide, the electrical lines can be guided to the individual fuel injection valves or the like. In the assembled state then results in a compact design, which also facilitates the installation of other attachments. Furthermore, a reliable protection of the electrical lines from the environment is guaranteed.

It is advantageous that the cable guide comprises a housing having an interior, that the housing is designed so that in an open state of the housing, electrical cables can be introduced into an interior of the housing and that in a closed state of the housing, the interior with respect to the environment is protected. In this case, it is also advantageous that the housing has an insertion rail with a U-shaped profile and a lid, and that the cover can be connected to the insertion rail. The U-shaped profile is preferably with the at least one

Holding element connected. During assembly, the electrical cables can then be inserted into the insertion rail. This results already the final position relative to outputs of the component, in particular cups of the fuel distributor. The lid can then be connected, for example by latching with the insertion rail.

In a modified embodiment, it is advantageous that a housing part is provided on the at least one holding element, that has a holder-fixed guide profile part and a pivotable lid part. During assembly, the electrical cables can then be inserted into the guide profile part. It is also advantageous that the

Cover part is connected to the guide profile part via a film hinge. This facilitates the assembly, since the position of the cover part on the guide profile part is already given constructive. Furthermore, a captive for the lid part is given.

When the electrical cables are inserted into the guide profile part, then the cover part can be connected for example by a latching connection with the guide profile part, whereby the cover part is fixed in a closed pivot position.

It is advantageous here, too, that at least one insertion rail is provided and that in the closed pivot position of the cover part of the provided on the holding member housing part one end of the insertion rail between the cover part and is fixed to the guide profile part. Thus, reliable protection of the electric wires can be ensured.

Thus, by the holding device is a functional integration of one hand

Attachment to the internal combustion engine and on the other hand a cable attachment,

Cable management and cable protection possible. The holding device can in this case be adapted to the geometric configuration of the component, which can be made metallic, and to the installation space available on the motor side. Here, essential parts can be designed as injection molded parts, so that a

yields advantageous design variety and a variety of design variants can be realized at low production costs. In particular, the execution of the fixation and guide can be done directly on the component, which also facilitates the connection to fuel injectors or the like. In particular, this is a precise routing of the signal and / or power supply for a

Fuel distribution system possible. Also, the connection of the electrical cables to the elements to be controlled, such as injectors, sensors, a fuel pump and

Control valves, and the connection of the interface, in particular a plug, can be performed by exact position, with a reliable fixation is possible. The assembly can be done in different ways depending on the design flexible.

For example, a preassembled cable harness can be suitably fixed via the cable guide. In this case, a pre-assembly within a fuel distributor system is possible. It is also possible to pre-assemble the cable management on the fuel distributor system, wherein the assembly of the wiring harness takes place only during assembly to the internal combustion engine. In this case, other combinations and designs of the assembly are conceivable.

Short descriptions of the drawings

Preferred embodiments of the invention are described in the following description with reference to the accompanying drawings, in which corresponding

Elements are provided with matching reference numerals, explained in more detail. Show it:

1 shows an arrangement with a holding device and a fuel distributor in a spatial representation according to a first embodiment of the invention.

Figure 2 shows the holding device of the arrangement shown in Figure 1 according to the first embodiment of the invention in a disassembled state prior to assembly ..; 3 shows an arrangement with a holding device and a fuel distributor in a three-dimensional representation according to a second embodiment of the invention;

Fig. 4 is a partial representation of the holding device shown in Fig. 3 of the second embodiment at an open pivot position of a cover part and

Fig. 5 is a partial exploded view of the holding device shown in Fig. 3 of the second embodiment in a closed pivot position of

Cover part.

Embodiments of the invention

1 shows an arrangement 1 with a holding device 2 and a component 3 designed as a fuel distributor 3 in a three-dimensional representation according to a first exemplary embodiment. In this embodiment, the fuel distributor 3 is used for storing and distributing fuel to a plurality of fuel injection valves, which are connected via cups 4, 5, 6 of the fuel distributor 3 to the fuel distributor 3. The fuel distributor 3 has in this embodiment, a tubular body 7. The holding device 2 is used in particular for such fuel distributor 3. In a modified embodiment, however, the component 3 can also serve to guide other liquids. For example, the component 3 may also enable a cooling water supply for hybrid vehicle engines.

The cups 4 to 6 are suitably connected to the tubular base body 7. Further, a connecting thread 8 and an end piece 9 are provided on the tubular base body 7. To the connecting thread 8, for example, a

Fuel line are connected to the fuel distributor 3 with a

High pressure pump connects. The tail 9 can, depending on the design and

Use case, if necessary, also for receiving a sensor, in particular a pressure sensor, and / or for connecting a pressure relief valve serve. In this

Embodiment, the tubular body 7 extends along a

Longitudinal axis 10. The cups 4 to 6 are in this case arranged spaced apart along the longitudinal axis 10 on the tubular base body 7. The holding device 2 has holding elements 11, 12, 13 and a cable guide 14. The cable guide 14 has a housing 15. The housing 15 comprises an insertion rail 16 and a cover 17. The insertion rail 16 has a U-shaped profile. The lid 17 is mounted in the mounted state on the insertion rail 16, as illustrated in FIG. As a result, the cover 17 is connected to the insertion rail 16.

The holding element 1 1 has a first half-shell 18 and a second half-shell 19. Accordingly, the holding element 12 has a first half-shell 18A and a second half

Half shell 19A on. Furthermore, the holding element 13 has a first half-shell 18B and a second half-shell 19B.

The half shells 19, 19 A, 19 B are connected to the insertion rail 16 of the housing 15. This is also a one-piece design, for example, an injection molded part, possible. On the holding elements 1 1 to 13 mounting holes 20, 21, 22 are provided which allow attachment to the internal combustion engine. Here, by way of example, a fastener 23 designed as a screw 23 is shown, which extends through the fastening bore 20 of the retaining element 11. The fastening means 23 can be screwed into a suitable threaded bore of the internal combustion engine. As a result, the half shells 18, 19 of the holding element 1 1 are connected to each other. The half-shells 18, 19 of the holding element 1 1, the tubular

Surround body 7 of the fuel distributor 3, thereby fixing the tubular body 7 to the internal combustion engine.

The housing 15 of the cable guide 14 has suitable openings 24, 25 (FIG. 2) for guiding electrical cables into and out of the housing 15. In this case, further openings may be provided, which are configured at suitable locations in the housing 15.

Fig. 2 shows the holding device 2 of the arrangement 1 shown in FIG. 1 according to the first embodiment in the disassembled state prior to assembly. The half shells 19, 19 A, 19 B are connected to the insertion rail 16 of the housing 15. In this case, the half shells 19, 19A, 19B are spaced apart from one another on the housing 15 of the cable guide 14. Thus, the positions of the half shells 18, 18 A, 18 B are given with respect to the insertion rail 16. In the assembled state, the holding elements 1 1 to 13 are spaced from each other on the cable guide 14, wherein the

Retaining elements 1 1 to 13 are connected to the cable guide 14. In this

Embodiment are required a total of three according to the fastening means 23 configured fastener to screw the holder 2, for example, to the cylinder head of the engine. In the assembled state, an inner space 30 of the housing 15 is formed between the insertion rail with the U-shaped profile and the cover 17. The housing 15 is in this case configured such that in an open state of the housing 15 electrical cables in the interior 30 of the housing 15 can be introduced, in particular inserted, and that in a closed state of the housing 15 of the interior 30 relative to the

Environment is protected. As a result, among other things, a mechanical protection of the inserted in the interior 30 cable is guaranteed. Furthermore, a defined

Positioning in the cable guide 14 achieved. This allows the installation of more

Attachments are facilitated to the internal combustion engine or in the vicinity of the internal combustion engine.

In this embodiment, the lid 17 can be plugged onto the insertion rail 16. Here, a locking connection is possible. Thus, the cover 17 can be advantageously connected to the insertion rail 16, wherein the connection can be configured as a releasable connection. In a modified accordingly

Embodiment, however, other connections and / or embodiments of the lid 17 are possible.

Fig. 3 shows an arrangement 1 with a holding device 2 and a fuel distributor 3 in a partial, spatial representation corresponding to a second

Embodiment. In this embodiment, housing parts 31, 32, 33 are provided on the holding elements 11, 12, 13. The housing part 31 has a holder-fixed

Guide profile part 34 and a pivotable cover part 35. Furthermore, the housing part 32 has a holder-fixed guide profile part 34A and a pivotable cover part 35A.

In addition, the housing part 33 has a holder-fixed guide profile part 34B and a pivotable cover part 35B. The holder-fixed guide profile parts 34, 34A, 34B are each rigidly connected to the associated half-shell 19, 19A, 19B, wherein a one-piece design, in particular by injection molding, is possible. The

pivotable cover parts 35, 35A, 35B, however, are relative to the associated

Half shells 19, 19A, 19B pivotable.

The housing parts 31, 32, 33 are shown in Fig. 3 in a closed Schenkstellung the cover parts 35, 35A, 35B. In this closed Schenkstellung the cover parts 35, 35 A, 35 B are each closed with the associated guide profile part 34, 34 A, 34 B by a latching connection.

Between the housing parts 31, 32, an insertion rail 40 is arranged. Here is an end 40A of the insertion rail 40 between the cover part 35 and the guide profile part 34th fixed. Another end 40B of the insertion rail 40 is fixed between the cover part 35A and the guide profile part 34A. The insertion rail 40 may have a U-shaped profile. The electrical cables are then enclosed between the insertion rail 40 and an outer side 41 of the tubular base body 7. However, other embodiments of the insertion rail 40 are conceivable.

Furthermore, further insertion rails 42, 43, 44 are provided, which are mounted in a corresponding manner. Fig. 4 shows a partial representation of the holding device 2 shown in Fig. 3 of the second embodiment at an open pivot position of the cover part 35. Here, the cover part 35 is connected to the guide profile part 34 via film hinges 45, 46, 47, 48. For example, the cover part 35 and the guide profile part 34 may be formed together with the half-shell 19 of an injection molded part. When closing the cover part 35 engage locking lugs 49, 50, 51 of the cover part 35 in associated

Recesses 52, 53, 54 a. As a result, in the closed pivoting position, which is shown in FIG. 3, the latching connection between the cover part 35 and the

Guide profile part 34 is formed. The film hinges 45 to 48 ensure this relative positioning, so that the assembly is simplified. In addition, this gives a captive for the pivotable cover part 35.

In the region of the fastening bore 20, a metallic sleeve 55 can be inserted into the half-shell 19. FIG. 5 shows a partially exploded view of that shown in FIG

Holding device 2 of the second embodiment with closed pivot position of the cover part 35. In the region of the opening 20 and in the half-shell 18, a metallic sleeve 56 can be used. By an axis 57, the location of the

Fastener 23 with respect to the half-shells 18, 19 illustrated. In the assembled state, an elastic layer can be introduced into the existing sleeves 55, 56, thus achieving insulation of the retaining element 11 with respect to the fastening means 23, which in particular enables vibration isolation. As a result, among other things, the transmission of structure-borne sound is damped. The half-shell 18 has a holding region 60, in which elastic ribs 61, 62 are provided. The elastic ribs 61, 62 may for example be partially inserted into corresponding depressions of the holding region 60 of the half-shell 18. Accordingly, the half-shell 19 has a holding portion 63, in the elastic ribs 64, 65 are provided, as in a corresponding manner with reference to FIG. 2

is illustrated. The elastic ribs 64, 65 may, for example, be partially inserted into corresponding depressions of the holding region 63 of the half-shell 19. In this embodiment, a nose 66 is configured on the half-shell 18, which engages in an associated recess 67 of the half-shell 19 when the two half-shells 18, 19 are assembled. As a result, the connection between the half-shells 18, 19 is improved in the mounted state. In the assembled state, the half-shells 18, 19 with their holding regions 60, 63 surround the outer side 41 of the tubular main body 7. The direct contact here comes about via the elastic ribs 61, 62, 64, 65. Thus, the elastic ribs 61, 62, 64, 65 ensure some insulation, in particular one

Vibration isolation, to achieve a damping of structure-borne noise.

The configuration of the holding elements 12, 13 corresponds to the embodiment of

Retaining element 1 1.

In Fig. 5, as in Fig. 3, the engagement of the detents 49, 50, 51 in the recesses 52, 53, 54 illustrated.

By a correspondingly modified embodiment, the component 3 can also serve to guide other liquid or gaseous fluids. The holding device 2

then ensures in a corresponding manner an attachment of the component 3 to the internal combustion engine, in particular a cylinder head of the internal combustion engine.

The invention is not limited to the described embodiments.

Claims

claims

1. holding device (2) for fixing a component (3), in particular one

Fuel distributor (3), on an internal combustion engine with at least one holding element (1 1, 12, 13) by means of a fastening means (23) at least indirectly on the

Internal combustion engine is attachable,

characterized,

a cable guide (14) is provided and that the at least one retaining element (1 1, 12, 13) is connected at least indirectly to the cable guide (14).

2. Holding device according to claim 1,

characterized,

in that a plurality of holding elements (11, 12, 13) are provided, that the holding elements (1 1, 12, 13) are arranged at a distance from one another on the cable guide (14) and that the holding elements (11, 12, 13) are at least indirectly connected to the cable guide (14) are connected.

3. Holding device according to claim 1 or 2,

characterized,

in that the cable guide (14) has a housing (15) with an inner space (30) such that the housing (15) is configured in such a way that, in an opened state of the housing (15), electrical cables are inserted into the inner space (30) of the housing (15). 15) can be introduced and that in a closed state of the housing (15) of the interior (30) of the housing (15) is protected from the environment.

4. Holding device according to claim 3,

characterized,

in that the housing (15) has an insertion rail (16) with a U-shaped profile and a cover (17) and that the cover (17) can be connected to the insertion rail (16).

5. Holding device according to claim 3,

characterized,

a housing part (31, 32, 33) is provided on the at least one holding element (11, 12, 13), that a holder-fixed guide profile part (34, 34A, 34B) and a

pivotable cover part (35, 35A, 35B).

6. Holding device according to claim 5,

characterized,

in that the cover part (35, 35A, 35B) can be closed by the latching connection with the guide profile part (34, 34A, 34B) in a closed pivoting position.

7. Holding device according to claim 5 or 6,

characterized,

in that the cover part (35, 35A, 35B) is connected to the guide profile part (34, 34A, 34B) via at least one film hinge (45, 46, 47, 48).

8. Holding device according to one of claims 5 to 7,

characterized,

in that at least one insertion rail (40, 42, 43, 44) is provided, that in the closed pivoting position of the cover part (35, 35A, 35B) of the housing part (31, 32, 33) provided on the retaining element (11, 12, 13) ) has an end (40A, 40B) of

Insertion rail (40, 42, 43, 44) between the cover part (35, 35A, 35B and the

Guide profile part (34, 34A, 34B) is fixed.

9. Arrangement (1) with a holding device (2) according to any one of claims 1 to 8 and a component (3), which serves for guiding a fluid.

10. Arrangement according to claim 9,

characterized,

in that the at least one holding element (11, 12, 13) has a first half-shell (18, 18A, 18B) and a second half-shell (19, 19A, 19B) that is attached to a holding region (60) of the first half-shell (18, 18A, 18B) at least one elastic rib (61, 62) is provided, that at a holding portion (63) of the second half-shell (19, 19A, 19B) at least one elastic rib (64, 65) is provided and that the at least one elastic rib ( 61, 62) provided on the holding area (60) of the first half-shell (18, 18A, 18B) and the at least one elastic rib (64, 65) attached to the holding area (63) of the second half-shell (19, 19A, 19B) is provided, a tubular base body (7) of the

Surround component (3) at least substantially circumferentially.