System having a fuel distributor and multiple fuel injectors

Patent metadata

Field	Value
Publication number	US-10041460-B2
Application number	US-201314397309-A
Country	US
Kind code	B2
Filing date	Mar 27, 2013
Priority date	Apr 26, 2012
Publication date	Aug 7, 2018
Grant date	Aug 7, 2018

Abstract

A system, which in particular is used as a fuel injection system for high-pressure injection in internal combustion engines, includes a fuel distributor and a plurality of fuel injectors. Each of the fuel injectors is situated on a cup of the fuel distributor. At least one of the fuel injectors is fastened to the associated cup by a retaining clip. The retaining clip has at least one clip section which is situated between an inner side of the cup and an outer side of the fuel injector. Furthermore, at least one damping composite element is provided, which is situated between the clip section of the retaining clip and the outer side of the fuel injector. The damping composite element has an elastically deformable damping layer. A decoupling is thus realized, which acts to damp vibrations and consequently to reduce noise.

First claim

What is claimed is:

1. A system, comprising:
a fuel distributor;
a plurality of fuel injectors, each of the fuel injectors being situated on a cup of the fuel distributor and at least one of the fuel injectors being fastened by a retaining clip to the associated cup, wherein the retaining clip has at least one clip section situated between an inner side of the cup and an outer side of the fuel injector, the clip section having in a plane parallel to a longitudinal axis of the fuel injector at least one of: an at least approximately elliptical cross section, or an at least approximately circular cross section; and
at least one damping composite element situated between the clip section of the retaining clip and the outer side of the fuel injector, wherein the damping composite element has at least one elastically deformable damping layer and an outer side lying at least partially against the clip section.

2. The system as recited in claim 1 , wherein the system is a fuel injection system for high-pressure injection in an internal combustion engine.

3. The system as recited in claim 1 , wherein on the inner side of the cup, a recess is embodied into which the clip section of the retaining clip is inserted.

4. The system as recited in claim 1 , wherein:
on the outer side of the fuel injector a supporting area is disposed,
the supporting area being inclined in relation to a longitudinal axis of the fuel injector in an axial cross-section,
a first outer side of the damping composite element cooperates with the supporting area at the outer side of the fuel injector, and
a second outer side of the damping composite element faces away from the first outer side and cooperates with the clip section of the retaining clip.

5. The system as recited in claim 4 , wherein:
the supporting area is conical, and
the first outer side of the damping composite element at least essentially lies against the conical supporting area of the fuel injector.

6. The system as recited in claim 4 , wherein:
at least the clip section of the retaining clip has one of an at least approximately elliptical cross section and an at least approximately circular cross section, and
the second outer side of the damping composite element lies at least partially against the clip section.

7. The system as recited in claim 1 , wherein a mechanical force transmission via the mechanical fastening between the fuel injector and the associated cup always takes place via the damping layer of the damping composite element.

8. The system as recited in claim 1 , wherein the damping composite element has at least one metal layer connected to the damping layer.

9. The system as recited in claim 8 , wherein the damping layer is embodied as an outer-lying damping layer.

10. The system as recited in claim 8 , further comprising at least one additional metal layer, wherein the damping layer is situated between the metal layer and the additional metal layer.

11. The system as recited in claim 1 , wherein the damping composite includes a partially annular damping composite element, and wherein the damping composite element has end sections and an arched section connecting the end sections.

12. The system as recited in claim 11 , wherein at the end sections, the damping composite element has a greater width than at the arched section.

13. The system as recited in claim 1 , wherein the clip section has a curved surface contacting the outer side of the damping composite element.

14. The system as recited in claim 1 , wherein a second outer side of the damping composite element lies at least partially against both a supporting area of the fuel injector inclined relative to the longitudinal axis and an outer side of the fuel injector substantially parallel to the longitudinal axis.

15. The system as recited in claim 1 , wherein the damping composite element includes a first metal layer lying at least partially against a portion of the fuel injector.

16. The system as recited in claim 15 , wherein the damping composite element includes a second metal layer lying at least partially against a portion of the clip section.

17. The system as recited in claim 16 , wherein the at least one elastically deformable damping layer lies between the first metal layer and the second metal layer.

Assignees

• Bosch Gmbh Robert

Inventors

• Rehwald Andreas
• Maess Matthias
• Guengoer Goekhan

Classifications

• F02M61/14 Primary

  Arrangements of injectors with respect to engines; Mounting of injectors · CPC title

• F02M2200/855

  using clamp elements or fastening means, e.g. bolts or screws · CPC title

• F02M2200/8023

  the assembly involving use of quick-acting mechanisms, e.g. clips · CPC title

• F02M2200/803

  using clamp elements and fastening means; e.g. bolts or screws · CPC title

• F02M2200/09

  Fuel-injection apparatus having means for reducing noise · CPC title