System having a fuel distributor and multiple fuel injectors

Patent metadata

Field	Value
Publication number	US-9541047-B2
Application number	US-201314400818-A
Country	US
Kind code	B2
Filing date	Apr 2, 2013
Priority date	May 14, 2012
Publication date	Jan 10, 2017
Grant date	Jan 10, 2017

Abstract

A system, which is used in particular as a fuel injection system for the high-pressure injection in internal combustion engines, includes a fuel distributor and a plurality of fuel injectors. Each fuel injector is situated on a cup of the fuel distributor. At least one of the fuel injectors is fastened to the associated cup by a holding element, which has a supporting surface. The cup has a contact surface on an underside, by way of which the cup is supported at the supporting surface of the holding element by a damping layer. The holding element is attached to the cup. In addition, the fuel injector has a collar, which is braced on the holding element. Because of the damping layer, vibrations are able to be dampened, and the noise transmissions is able to be reduced.

First claim

What is claimed is:

1. A system, comprising:
a fuel distributor; and
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 to the associated cup by a holding element, wherein the holding element has a supporting surface, wherein the cup has a contact surface at an underside of the cup, via which the cup is supported at the supporting surface of the holding element by at least one damping layer, and wherein the holding element is secured on the cup, and the fuel injector has a collar which is at least indirectly supported on the holding element.

2. The system of claim 1 , wherein at least one of the following is satisfied:
(i) the collar of the fuel injector is at least indirectly supported at the supporting surface of the holding element,
(ii) the collar of the fuel injector is supported on the holding element by the damping layer, and
(iii) the collar of the fuel injector is supported on the supporting surface of the holding element by the damping layer.

3. The system of claim 1 , wherein the holding element has at least one holding section, the cup has a collar, and the holding section of the holding element clasps the collar of the cup from behind.

4. The system of claim 3 , wherein the holding section is configured as a holding section bent in a U-shape.

5. The system of claim 3 , wherein the holding section of the holding element rests directly against the collar of the cup.

6. The system of claim 3 , wherein the holding section of the holding element rests against the collar of the cup by at least one further damping layer.

7. The system of claim 3 , wherein the damping layer at the supporting surface also extends along an inner side of the holding section of the holding element and the holding section of the holding element is supported on the collar of the cup by the damping layer.

8. The system of claim 1 , wherein the damping layer is based on a visco-elastic material.

9. The system of claim 1 , wherein the damping layer is connected to the holding element.

10. The system of claim 1 , wherein the damping layer is configured as a separate insertion part.

11. The system of claim 1 , wherein the holding element includes at least one U-shaped holding section, the cup has a collar which is positioned within the U-shaped holding section, and the damping layer extends along an inside of the U-shaped holding section so that the damping layer is in contact with the collar of the cup on at least two sides of the collar of the cup.

12. The system of claim 11 , wherein the collar of the fuel injector is in contact with the damping layer.

13. The system of claim 1 , wherein the holding element includes at least one U-shaped holding section, the cup has a collar which is positioned with the U-shaped holding section, the damping layer is in connect with the collar on a first side of the collar of the cup, and a further damping layer is in contact with the collar on a second side of the collar of the cup.

14. The system of claim 13 , wherein the collar of the fuel injector is in contact with the damping layer.

Assignees

• Bosch Gmbh Robert

Inventors

• Pohlmann Jens
• Fischer Michael
• Riemer Martin
• Friedrich Markus
• Rehwald Andreas
• Mayer Michael
• Uhlenbrock Dietmar
• Maess Matthias
• Guengoer Goekhan
• Kannan Venkatesh

Classifications

• F02M69/465

  of fuel rails · CPC title

• F02M2200/855

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

• F02M41/00

  Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor · 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