Injection system, in particular fuel injection system, having a fluid-conveying component, a metering valve, and a mounting system

Abstract

A mounting system for fuel injection systems connects a fuel injection valve to a fluid-conveying component and includes a connector piece of the metering valve being inserted at least partly into a receiving space of a connector body of the component; a support part disposed on the connector piece; a decoupling element; a dished disk inserted into a receiving space of the connector body and immobilized along a longitudinal axis of the receiving space relative to the connector body. The support part has a spherical support surface that faces toward a dished surface of the dished disk. The decoupling element is disposed between the spherical support surface of the support part and the dished disk. The connector piece is mounted on the connector body via the support part, decoupling element, and dished disk.

Claims

1. A mounting system for connecting a metering valve to a fluid-conveyor, the mounting system comprising: a disk that is insertable at least partly into a receiving space of a connector body of the fluid-conveyor along a longitudinal axis of the receiving space to a position at which the disk is immobilized relative to the connector body with respect to a direction of extension of the longitudinal axis; a support that includes a support surface that faces toward a surface of the disk; a decoupler disposed between the support surface of the support and the surface of the disk towards which the support surface of the support faces; and a connector on which the support is disposed and that: is connectable to the metering valve; is insertable at least partly into the receiving space of the connector body; and is mountable to the connector body via (a) the support, (b) the decoupler, and (c) the disk.

2. The mounting system of claim 1, wherein the support surface of the support is spherical, and the surface of the disk towards which the support surface of the support faces is a concave surface.

3. The mounting system of claim 1, wherein the support surface of the support is flat, and the surface of the disk towards which the support surface of the support faces is flat.

4. The mounting system of claim 1, wherein the support surface of the support is conical, and the surface of the disk towards which the support surface of the support faces is conical.

5. The mounting system of claim 1, further comprising a retainer, wherein a radially exterior side of the disk includes a recess, and each of the at least one part of the retainer is insertable to extend through a respective corresponding opening in the connector body and engage the recess.

6. The mounting system of claim 2, wherein the at least one part is annularly shaped.

7. The mounting system of claim 5, wherein the decoupler is designed as part of a hollow sphere (15).

8. The mounting system of claim 5, wherein the decoupler is designed as part of a perforated hollow sphere cap.

9. The mounting system of claim 1, wherein the decoupler is constituted at least in part of an elastic material.

10. The mounting system of claim 1, wherein the decoupler has a layered structure.

11. The mounting system of claim 1, wherein the decoupler has a layered sandwich structure that includes at least one elastic intermediate layer.

12. The mounting system of claim 11, wherein: the decoupler includes a first outer metallic or at least substantially inelastic plastic layer and a second outer metallic or at least substantially inelastic plastic layer; and the elastic intermediate layer is disposed between the first and second outer layers.

13. The mounting system of claim 1, wherein the decoupler is a metallic spring.

14. The mounting system of claim 1, wherein the surface of the disk towards which the support surface of the support faces is configured as an at least partly structured concave surface.

15. The mounting system of claim 1, wherein the metering valve and fluid-conveyor are part of an injection system.

16. The mounting system of claim 1, wherein the metering valve and fluid-conveyor are part of a fuel injection system.

17. An injection system comprising: a metering valve; a fluid-conveyor that includes a connector body within which there is a receiving space; and a mounting system via which the metering valve is mounted to the fluid-conveyor, the mounting system including: a disk inserted at least partly into the receiving space along a longitudinal axis of the receiving space and is immobilized relative to the connector body with respect to a direction of extension of the longitudinal axis; a support that includes a support surface that faces toward a surface of the disk; a decoupler disposed between the support surface of the support and the surface of the disk towards which the support surface of the support faces; and a connector on which the support is disposed, and that: is connected to the metering valve; is inserted at least partly into the receiving space of the connector body; and is mounted to the connector body via (a) the support, (b) the decoupler, and (c) the disk.

18. The injection system of claim 17, wherein the injection system is configured for fuel injection in a mixture-compressing spark-ignited internal combustion engine.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a partial schematic sectioned depiction of a fuel injection system having a mounting system, according to an example embodiment of the present invention.

(2) FIG. 2 shows a decoupling element of the mounting system depicted in FIG. 1, according to an example embodiment of the present invention.

(3) FIG. 3 shows a decoupling element of the mounting system depicted in FIG. 1, according to another example embodiment of the present invention.

(4) FIG. 4 shows a decoupling element of the mounting system depicted in FIG. 1, according to another example embodiment of the present invention.

(5) FIG. 5 shows a support part of the mounting system depicted in FIG. 1, according to an example embodiment of the present invention.

(6) FIG. 6 is a three-dimensional sectioned depiction of the support part depicted in FIG. 5, a longitudinal axis being located in the section plane, according to an example embodiment of the present invention.

(7) FIG. 7 shows a dished disk of the mounting system depicted in FIG. 1, according to an example embodiment of the present invention.

(8) FIG. 8 shows a retaining element of the mounting system depicted in FIG. 1, according to an example embodiment of the present invention.

(9) FIG. 9 shows a retaining element of the mounting system depicted in FIG. 1, according to another example embodiment of the present invention.

(10) FIG. 10 shows a retaining element of the mounting system depicted in FIG. 1, according to another example embodiment of the present invention.

DETAILED DESCRIPTION

(11) FIG. 1 is a partial schematic sectioned depiction of a fuel injection system 1 having a mounting system 2, in accordance with an exemplifying embodiment. Fuel injection system 1 has a fuel injection valve 3 and a fuel-conveying component 4. Fuel injection valve 3 has a connector piece 5 that encompasses an axial passthrough orifice 6 in order to convey fuel into fuel injection valve 3. In this exemplifying embodiment, fuel-conveying component 4 has a tubular basic body 7 and a connector body 8. In this exemplifying embodiment, connector body 8 is embodied as a cup 8 and has a receiving space 9.

(12) Connector piece 5 is inserted at least partly into receiving space 9 of connector body 8. Fuel sealing is ensured in this context by way of a sealing ring 10.

(13) A dished disk 11, on which a dished surface 12 (FIG. 7) is embodied, is furthermore inserted into receiving space 9. In this exemplifying embodiment, a support part 13 that is connected to connector piece 5 is furthermore disposed on connector piece 5. This can be accomplished by way of at least one support part fastening means 13A that is embodied in particular as an expanding ring 13A. In a modified embodiment, support part 13 can in principle also be a constituent of connector piece 5. A spherical support surface 14 (FIG. 6), which faces toward dished surface 12, is embodied on support part 13.

(14) In the installed state, a decoupling element 15 is disposed between dished surface 12 of dished disk 11 and spherical support surface 14 of support part 13. Decoupling element 15 preferably abuts substantially against the entire dished surface 12 and/or at least substantially against the entire spherical support surface 14, so that full-coverage abutment of decoupling element 15 on both sides, respectively against dished surface 12 and spherical support surface 14, is produced.

(15) In the installed state, fuel injection valve 3 is then aligned with reference to a longitudinal axis 20, predefined by connector body 8, of receiving space 9. Reliable positioning of fuel injection valve 3 in a cylinder-head orifice can correspondingly be accomplished, for example. Mounting system 2 makes additional fastening or bracing (by way of a metallic contact) of fuel injection valve 3 against the cylinder head superfluous. Transfer of vibrations between fuel injection valve 3 and the cylinder head is thereby, in particular, avoided. Insulation of fuel injection valve 3 from connector body 8 and thus from fuel-conveying component 4 is furthermore provided by decoupling element 15. This reduces or prevents, in particular, the transmission of solid-borne sound. An elastic retaining clamp 20A, which is disposed between connector body 8 and fuel injection valve 3, can be provided.

(16) In this exemplifying embodiment, immobilization of dished disk 11 on connector body 8 is accomplished via a retaining element 21. Connector body 8 has openings 22, 23. Retaining element 21 can thereby be installed from outer side 24. In the installed state, retaining element 21 engages through openings 22, 23 into at least one recess 25 (FIG. 7) of dished disk 11. Immobilization of dished disk 11 along longitudinal axis 20 is thereby ensured by way of retaining element 21. Simple installation (and removal) of fuel injection valve 3 on component 4 by way of mounting system 2 is thereby enabled.

(17) FIG. 2 is a schematic three-dimensional depiction of a decoupling element 15 of the mounting system depicted in FIG. 1, in accordance with a first possible embodiment. In this embodiment, layers 26, 27, 28 are provided. Layer 28 is preferably embodied as an elastic intermediate layer in order to enable a sandwich structure. Layer 26 serves here as a first outer layer 26, and layer 27 serves as a second outer layer 27. Layers 26, 27 are preferably embodied as metallic layers 26, 27 and/or as at least substantially inelastic plastic layers. Improved stability at an outer side 29 of layer 26 and at an outer side 30 of layer 27 can thereby, in particular, be achieved. Outer side 29 abuts in the installed state against spherical support surface 14 of support part 13. Outer side 30 abuts in the installed state against dished surface 12 of dished disk 11. A collar 31, which surrounds connector piece 5 in portions in the installed state, can also be shaped onto decoupling element 15 in order also to ensure insulation with respect to dished disk 11 in a radial direction with reference to longitudinal axis 20. Collar 31 can furthermore ensure positioning of decoupling element 15 on dished disk 11.

(18) FIG. 3 shows the decoupling element depicted in FIG. 2 in accordance with a second possible embodiment. In this embodiment, decoupling element 15 is configured as a metallic spring element 15. Recesses 32, 33 (only recesses 32, 33 of which are labeled in order to simplify the depiction) can be provided on decoupling element 15 in addition to a three-dimensional configuration in order to define the elastic effect desired in the particular application instance, in particular a spring constant.

(19) FIG. 4 shows the decoupling element depicted in FIG. 2 in accordance with a third possible configuration. Decoupling element 15 can be configured here, for example, as a shaped element generated in a tool. An axial opening 34, which can be of circular configuration and is oriented with reference to longitudinal axis 20 defined in the installed state, can also be embodied, for example, by punching.

(20) Several possibilities therefore exist for configuring a decoupling element 15 in terms of the respective application instance. A layered structure having two or more layers, one of which is described with reference to FIG. 2, can be implemented. Different materials can thereby advantageously be combined. For example, metallic materials and plastics can be combined. A thermoplastic, a thermoplastic elastomer, a natural rubber, and a synthetic rubber can be utilized for an elastic layer, in particular an elastic intermediate layer as explained in FIG. 2 with reference to layer 28, or also in the context of an embodiment made of a single material as described with reference to FIG. 4. A (non-layered) material composition can also be used as a material in this context. In addition, decoupling element 15 does not necessarily need to be installed as a separate component upon installation. Decoupling element 15 can, in particular, already be joined onto dished disk 11. Intermaterial connection or injection application of decoupling element 15 onto dished disk 11 is also conceivable. Decoupling element 15 can also, if applicable in interaction with an elastic sealing ring 10, make possible a certain tolerance compensation for positional deviations of fuel injection valve 3 from longitudinal axis 20. This relates in particular to tilts and to a coaxial offset. Damage to fuel injection valve 3 as a result of flexural forces or the like is thus prevented.

(21) FIG. 5 shows support part 13 of mounting system 2 depicted in FIG. 1, in accordance with a possible embodiment. Support part 13 has a passthrough orifice 40 through which connector piece 5 of fuel injection valve 3 extends in the installed state. Passthrough orifice 40 is configured as an axial passthrough orifice 40 with reference to longitudinal axis 20 predefined by installation. In this exemplifying embodiment, support part 13 is configured annularly with reference to longitudinal axis 20.

(22) FIG. 6 is a three-dimensional sectioned depiction of support part 13 depicted in FIG. 5, longitudinal axis 20 being located in the section plane. Support part 13 is preferably configured with a profile 41 that is uniform in a circumferential direction. A side 42 of profile 41 which adjoins spherical support surface 14 is then embodied in the shape of a circular arc.

(23) FIG. 7 is a schematic three-dimensional depiction of dished disk 11 of mounting system 2 depicted in FIG. 1, according to a preferred embodiment. Dished disk 11 can be based on a cylindrical basic body. Dished surface 12 is configured as part of a spherical surface. Dished surface 12 is configured symmetrically with reference to longitudinal axis 20. Dished disk 11 furthermore has an orifice 43, embodied as a passthrough orifice 43, which extends along longitudinal axis 20 and through which, in the installed state, connector piece 5 of fuel injection valve 3 extends. Recess 25, in the form of a circumferentially surrounding groove, is configured on an outer side 44, disposed in the installed state inside receiving space 9 of connector body 8, of dished disk 11.

(24) FIG. 8 is a schematic three-dimensional depiction of retaining element 21 of mounting system 2 depicted in FIG. 1, in accordance with a first possible embodiment. In this exemplifying embodiment, retaining element 21 has a first arm 45 and a second arm 46. Retaining element 21 furthermore has a connecting shackle 47 by way of which arms 45, 46 are connected to one another. In the installed state, connecting shackle 47 is located outside connector body 8. A part 48 and a part 49, each in the form of an annular disk part 48, 49, are respectively configured on arms 45, 46. Parts 48, 49 of arms 45, 46 engage in the installed state into recess 25 of dished disk 11. A certain elastic deformability can be predefined in particular by connecting shackle 47 in order to spread arms 45, 46 apart from each other.

(25) FIG. 9 is a schematic three-dimensional depiction of retaining element 21 of mounting system 2 depicted in FIG. 1, in accordance with a second possible exemplifying embodiment. In this exemplifying embodiment, retaining element 21 is based on a peg-shaped configuration, a bevel 51 being provided on a cylindrical basic body 50 in this exemplifying embodiment. Openings 22, 23 (FIG. 1) of connector body 8 can be configured, for example, as orifices. Retaining element 21 can then be inserted, with bevel 51 at the front, through such an opening 22, 23 in order to engage in the installed state into recess 25 of dished disk 11. One or several further such retaining elements 21 can correspondingly be provided when a corresponding number of openings 21, 22 are configured in connector body 8.

(26) FIG. 10 is a schematic three-dimensional depiction of retaining element 21 of mounting system 2 depicted in FIG. 1, in accordance with a third possible embodiment. In this embodiment, retaining element 21 is based on a shackle-shaped basic shape 52 having a connecting shackle 47 and arms 45, 46. In the installed state, connecting shackle 47 can then be located outside connector body 8, and arms 45, 46 engage at least partly into recess 25. Corresponding orifices can be configured in connector body 8, four openings 22, 23 in particular being capable of being constituted in order to enable installation of retaining element 21.

(27) A variety of modifications are possible in terms of the configuration of fuel injection system 1 and of mounting system 2. For example, support part 13 can be connected in suitable fashion to connector piece 5 of fuel injection valve 3. Pressing on, welding, or soldering are possible. A loose or detachable connection is, however, also possible. It is also conceivable in this context for the position along longitudinal axis 20 to be adjustable within certain limits and then immobilizable.

(28) In a modified configuration, support part 13 can also have a flat or conical support surface 14. Instead of a dished disk 11, a support disk 11 that has a respectively flat or conical support disk surface 12 is then correspondingly provided. Support part 13 can furthermore be not only annularly configured. In particular, support part 13 can also be configured in the form of a partial ring or several ring parts in order to enable lateral fitting onto connector piece 5 with reference to longitudinal axis 20.

(29) The invention is not limited to the embodiments described.