Fuel injection system comprising a fuel-guiding component, a fuel injection valve and a mounting

Abstract

A mounting is provided for fuel injection systems, the mounting connecting a fuel injection valve to a fuel-conducting component, and having a connecting body and a connecting piece that are connected to one another. Inside the connecting body and the connecting piece there is configured a receptacle space in which a fuel connector of the fuel injection valve is at least partly situated. An inner collar is configured on the connecting piece. In addition, an elastically deformable element is provided. The elastically deformable element is supported at least indirectly on the inner collar of the connecting piece. In addition, the fuel connector is supported at least indirectly on the elastically deformable element. In addition, a fuel injection system having such a mounting is described.

Claims

1. A mounting for a fuel injection system for connecting a fuel injection valve to a fuel-conducting component, comprising: a connecting piece, there being provided inside the connecting piece a receptacle space in which a fuel connector of the fuel injection valve is at least partly situated, and an inner collar is configured on the connecting piece, wherein an elastically deformable element is provided, and the elastically deformable element is supported at least indirectly on the inner collar of the connecting piece, and the fuel connector is supported at least indirectly on the elastically deformable element; wherein an annular supporting element is provided, and the elastically deformable element is supported on the inner collar of the connecting piece by the annular supporting element.

2. The mounting of claim 1, wherein the annular support element has an annular opening in which the elastically deformable element is at least partly set, and/or the elastically deformable element is configured as an annular elastically deformable element.

3. The mounting of claim 2, wherein the annular opening of the annular support element is made inwardly open.

4. A mounting for a fuel injection system for connecting a fuel injection valve to a fuel-conducting component, comprising: a connecting piece, there being provided inside the connecting piece a receptacle space in which a fuel connector of the fuel injection valve is at least partly situated, and an inner collar is configured on the connecting piece, wherein an elastically deformable element is provided, and the elastically deformable element is supported at least indirectly on the inner collar of the connecting piece, and the fuel connector is supported at least indirectly on the elastically deformable element; wherein a support surface is configured on the fuel connector or on an element connected to the fuel connector, and an annular angled element is provided that has an L-shaped profile in which the elastically deformable element is at least partly set, and the fuel connector is supported on the elastically deformable element at least via the annular angled element.

5. The mounting of claim 4, wherein the annular angled element lies against an outer side of the fuel connector.

6. The mounting of claim 4, wherein the element connected to the fuel connector is connected to the fuel connector with a material fit.

7. A mounting for a fuel injection system for connecting a fuel injection valve to a fuel-conducting component, comprising: a connecting piece, there being provided inside the connecting piece a receptacle space in which a fuel connector of the fuel injection valve is at least partly situated, and an inner collar is configured on the connecting piece, wherein an elastically deformable element is provided, and the elastically deformable element is supported at least indirectly on the inner collar of the connecting piece, and the fuel connector is supported at least indirectly on the elastically deformable element; wherein a U-shaped connecting clip is provided, and the connecting piece is connected to a connecting body of the fuel-conducting component via the U-shaped connecting clip, and the connecting body has on its outer side at least one opening, and the connecting piece has on its inner side at least one opening that is allocated to the opening of the connecting body, and the U-shaped connecting clip engages in the at least one opening of the connecting body and in the at least one opening of the connecting piece, and the U-shaped connecting clip is oriented at least approximately perpendicular to a longitudinal axis of the receptacle space.

8. A fuel injection system for mixture-compressing externally ignited internal combustion engines, comprising: at least one fuel-conducting component; at least one fuel injection valve; and at least one mounting; wherein the fuel injection valve is mounted on the fuel-conducting component via the mounting, wherein the mounting includes a connecting piece, there being provided inside the connecting piece a receptacle space in which a fuel connector of the fuel injection valve is at least partly situated, and an inner collar is configured on the connecting piece, wherein an elastically deformable element is provided, and the elastically deformable element is supported at least indirectly on the inner collar of the connecting piece, and the fuel connector is supported at least indirectly on the elastically deformable element, and wherein an annular supporting element is provided, and the elastically deformable element is supported on the inner collar of the connecting piece by the annular supporting element.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 shows a fuel injection system having a mounting, in a partial schematic sectional representation corresponding to a first exemplary embodiment of the present invention.

(2) FIG. 2 shows a fuel injection system having a mounting, in a partial schematic sectional representation corresponding to a second exemplary embodiment of the present invention.

(3) FIG. 3 shows a connecting clip of the mounting shown in FIG. 2, corresponding to the second exemplary embodiment of the present invention.

DETAILED DESCRIPTION

(4) FIG. 1 shows a fuel injection system 1 having a mounting 2, in a partial schematic sectional representation corresponding to a first exemplary embodiment. Fuel injection system 1 can be used in particular for high-pressure injection in internal combustion engines. Specifically, fuel injection system 1 can be used in mixture-compressing externally ignited internal combustion engines. Mounting 2 is particularly suitable for such a fuel injection system 1.

(5) Fuel injection system 1 has a fuel-conducting component 3 that, in this exemplary embodiment, is configured as fuel distributor rail 3. Fuel distributor rail 3 has a tube-shaped main body 4 and a connecting body 5. In tube-shaped main body 4 there is configured an oblong combustion chamber 6, from which there branches off a connecting duct 7 that is routed through connecting body 5. Here, further connecting bodies, which are configured in a manner corresponding to connecting body 5, may be attached on tube-shaped main body 4. Here, connecting body 5 is a component of mounting 2. Connecting body 5 can be connected to tube-shaped main body 4 in a suitable manner. However, tube-shaped main body 4 is not necessarily a component of mounting 2, because mounting 2 having connecting body 5 can also be manufactured and distributed independently of tube-shaped main body 4. In the context of a pre-installation, connecting body 5 can then be connected, together with further correspondingly configured connecting bodies, to tube-shaped main body 4, which is possible for example by welding. In this exemplary embodiment, connecting body 5 has an outer threading 8. In addition, mounting 2 has a connecting piece 9 having an inner threading 10. At least in the region of inner threading 10, connecting piece 9 is configured with a tubular shape. Here, connecting piece 9 has at an end face 11 an interior collar 12. In the assembled state, as shown in FIG. 1, connecting piece 9 is screwed with its inner threading 10 onto an outer threading 8 of connecting body 5. In this exemplary embodiment, connecting piece 9 is thus configured in the form of a cap nut 9. In this exemplary embodiment, connecting body 5 is configured as rail cup 5.

(6) In this way, connecting body 5 and connecting piece 9 are connected to one another. In the connected state, a receptacle space 15 is configured inside connecting body 5 and connecting piece 9, in which a fuel connector 16 of a fuel injection valve 17 of fuel injection system 1 is partly situated.

(7) Fuel connector 16 has a collar 18 on which there is provided an inlet for the fuel, in order to conduct the fuel from connecting duct 7 into a fuel chamber 19 in the interior of fuel injection valve 17. In the area of collar 18, a sealing ring 20 is provided that is situated between fuel connector 16 and connecting body 5 in order to form a seal. Sealing ring 20 is here situated between collar 18 and a support ring 21. Support ring 21 surrounds a tapered segment of fuel connector 16.

(8) On inner collar 12 of connecting piece 9 there is configured a seating surface 22. Seating surface 22 is here oriented toward receptacle space 15. In addition, seating surface 22 is made with a conical shape relative to a longitudinal axis 23 of receptacle space 15. An opening angle for seating surface 22 can for example be approximately 45.

(9) Moreover, an annular support element 24 is provided on which there is configured a rounded edge 25. Annular support element 24 is situated in receptacle space 15, and surrounds fuel connector 16. Rounded edge 25 of annular support element 24 here faces support surface 22 of inner collar 18. Annular support element 24 is supported on seating surface 22 of inner collar 18 via rounded edge 25.

(10) In addition, annular support element 24 has an annular opening 26. Annular opening 26 is made inwardly open. This means that annular opening 26 is made so as to be open toward fuel connector 16. An elastically deformable element 27 is partly placed into annular opening 26.

(11) Elastically deformable element 27, which is placed partly into annular opening 26 of annular support element 24, is thus supported on inner collar 18 of connecting piece 9 via annular supporting element 24. In this way, in this exemplary embodiment elastically deformable element 27 is indirectly supported on inner collar 18. In a modified embodiment, elastically deformable element 27 can however also be supported directly on inner collar 12 of connecting piece 9.

(12) In addition, in this exemplary embodiment an annular element 30 is provided that is connected to fuel connector 16 via a weld seam 31. In a modified embodiment, annular element 30 can however also be configured as snap ring 30, or can be connected to fuel connector 16 in some other way.

(13) A support surface 32 is configured on annular element 30. In a modified embodiment, however, support surface 32 can also be configured directly on fuel connector 16, in particular on a collar of fuel connector 16.

(14) In addition, an annular angled element 33 is provided that has an L-shaped profile into which elastically deformable element 27 is partly placed. Elastically deformable element 27 has, in this exemplary embodiment, a rectangular, in particular quadratic, profile, and is made with an annular shape. Thus, elastically deformable element 27 is situated between annular angled element 33 and angular support element 24.

(15) Thus, in this exemplary embodiment elastically deformable element 27 is supported on support surface 32 of annular element 30 by annular angled element 33. Thus, elastically deformable element 27 is supported indirectly on support surface 32 of annular element 30. In a modified embodiment, elastically deformable element 27 can also be supported directly on support surface 32 of annular element 30.

(16) In this exemplary embodiment, annular angled element 33 is supported on an outer side 34 of fuel connector 16. In this way, a stationary positioning of annular angled element 33 on fuel connector 16 is ensured.

(17) Via a weld seam 31, in this exemplary embodiment a material connection of annular element 30 to fuel connector 16 is formed. However, a positive connection can also be provided. Other types of connection are also conceivable.

(18) Thus, fuel connector 16 is supported on inner collar 18 of connecting piece 9 at least via elastically deformable element 27. In this way, a direct contact between connecting piece 9 and fuel connector 16 is avoided. In this way, vibrations are substantially damped. Therefore, an elastic bearing of fuel injection valve 17 can advantageously be realized. Here, elastically deformable element 27 can be realized by a wire mesh, a plate spring, a special spring, or in some other way. Here, elastically deformable element 27 can be configured in such a way that it also acts as angular tolerance compensating element 27. The flow of force between fuel connector 16 and fuel-conducting component 3 is guided via elastically deformable element 27, and in this way a transmission of vibrations is substantially damped.

(19) FIG. 2 shows a fuel injection system 1 having a mounting 2 in a partial schematic sectional representation corresponding to a second exemplary embodiment. In this exemplary embodiment, connecting body 5 has openings 41, 42 on its outer side 40. In addition, connecting piece 9 has openings 44, 45 on its inner side 43. Opening 44 of connecting piece 9 is here allocated to opening 41 of connecting body 5. In addition, opening 45 of connecting piece 9 is allocated to opening 42 of connecting body 5. In the installed state, opening 41 of connecting body 5 and opening 44 of connecting piece 9 form a cylindrical open space into which an arm 46 of a U-shaped connecting clip 47 is inserted. In addition, opening 45 of connecting piece 9 and opening 42 of connecting body 5 form a cylindrical open space into which a further arm 48 of U-shaped connecting clip 47 is inserted. U-shaped connecting clip 47 is here oriented perpendicular to longitudinal axis 23 of receptacle space 15. This means that the two arms 46, 48 are situated in a plane that is oriented perpendicular to longitudinal axis 23.

(20) Thus, connecting piece 9 is connected to connecting body 5 via a U-shaped connecting clip 47. In this exemplary embodiment, connecting piece 9 is configured as pot-shaped connecting piece 9.

(21) FIG. 3 shows U-shaped connecting clip 47, shown in FIG. 2 in a schematic representation. Here, arm 46 is connected to further arm 48 via a bent connecting segment 49. An inner side 50 of bent connecting segment 49 can here form a stop for the installation.

(22) The present invention is not limited to the described exemplary embodiments.