System having a fuel distributor and a mounting support

Patent metadata

Field	Value
Publication number	US-9970402-B2
Application number	US-201313871561-A
Country	US
Kind code	B2
Filing date	Apr 26, 2013
Priority date	Apr 26, 2012
Publication date	May 15, 2018
Grant date	May 15, 2018

Abstract

A system, which may be embodied particularly as a fuel injection system for high pressure injection in internal combustion engines, includes a fuel distributor and a mounting support, which is used for fastening the fuel distributor to an externally-mounted structure, particularly a cylinder head, of an internal combustion engine. In this case, a damping composite element is provided, which is connected to the mounting support and/or the fuel distributor. The damping composite element includes at least one metal layer, which is formed at least essentially of a metallic material, and at least one elastically deformable damping layer.

First claim

What is claimed is:

1. A system, comprising:
a fuel distributor;
a first attachment structure;
a second attachment structure;
a mounting support by which the fuel distributor is simultaneously and independently fastened to a first attachment structure by an attachment of the first attachment structure to the mounting support at a first attachment point and to a second attachment structure by an attachment of the second attachment structure to the mounting support at a second attachment point, the attachments of the first and second attachment structures at the first and second attachment points, respectively, being independent of each other; and
a damping composite element connected to the mounting support and the fuel distributor;
wherein:
the damping composite element includes:
at least one metal layer formed of a metallic layer; and
at least one elastically deformable damping layer; and

the mounting support is arranged relative to the fuel distributor so that:
the fuel distributor and the first and second attachment structures are positioned at a same first side of the mounting support;
no part of the fuel distributor and no part of the first and second attachment structures are at respective second sides of the mounting support that are respectively opposite the respective first sides;
in each of at least one plane, positions of the fuel distributor and the first and second attachment structures (a) are offset from each other with respect to a first axis so that, in the each of the at least one plane, no coordinate of the first axis is shared by both the fuel distributor and the first and second attachment structures and (b) overlap each other with respect to a second axis that is perpendicular to the first axis so that, in the each of the at least one plane, a first coordinate of the second axis is shared by both the fuel distributor and the first attachment structure and a second coordinate of the second axis is shared by both the fuel distributor and the second attachment structure; and
the damping composite element (a) circumferentially wraps around at least a portion of an outer surface of the fuel distributor and (b) extends axially in a direction parallel to the second axis from (i) the first attachment point, which is at the first coordinate of the second axis shared by the fuel distributor and the first attachment structure to (ii) the second attachment point, which is at the second coordinate of the second axis shared by the fuel distributor and the second attachment structure.

2. The system of claim 1 , wherein, in the each of the at least one plane, no coordinate of the second axis is shared by both of the first and second attachment structures.

3. A system, comprising:
a fuel distributor;
at least one mounting support for simultaneously fastening the fuel distributor to a first attachment structure and a second attachment structure; and
a damping composite element connected to the at least one mounting support and the fuel distributor;
wherein:
the damping composite element includes:
at least one metal layer formed of a metallic layer; and
at least one elastically deformable damping layer; and

the at least one mounting support is arranged relative to the fuel distributor for positioning of the fuel distributor and the first and second attachment structures at a same first side of the at least one mounting support when the fuel distributor and the first and second attachment structures are fastened to each other by the at least one mounting support, so that, when the fuel distributor and the first and second attachment structures are fastened to each other by the at least one mounting support:
no part of the fuel distributor and no part of the first and second attachment structures are at respective second sides of the at least one mounting support that are respectively opposite the respective first sides;
in at least one plane, positions of the fuel distributor and the first and second attachment structure (a) are offset from each other with respect to a first axis so that, in the at least one plane, no coordinate of the first axis is shared by both the fuel distributor and the first and second attachment structures and (b) overlap each other with respect to a second axis that is perpendicular to the first axis so that, in the at least one plane, at least one coordinate of the second axis is shared by both the fuel distributor and the first and second attachment structures; and
the damping composite element (a) circumferentially wraps around at least a portion of an outer surface of the fuel distributor and (b) extends axially in a direction parallel to the second axis from (i) a first coordinate of the second axis shared by the fuel distributor and the first attachment structure and at which the first attachment structure is attached to the at least one mounting support to (ii) a second coordinate of the second axis shared by the fuel distributor and the second attachment structure and at which the second attachment structure is attached to the at least one mounting support;

the circumferential wrapping is about a longitudinal axis that is or is parallel to the second axis, in the at least one plane;
no coordinate of the second axis occupied by the first attachment structure is occupied by the second attachment structure; and
at least a portion of the fuel distributor, at least a portion of the first attachment structure, and at least a portion of the second attachment structure are present in each of the at least one plane.

4. The system as recited in claim 3 , wherein, in the at least one plane, the positions of the first and second attachment structure overlap each other with respect to the first axis, so that at least one coordinate of the first axis is shared by both of the first and second attachment structures.

5. A system, comprising:
a fuel distributor;
a mounted structure;
a layered structure that includes a mounting support layer and layers forming a damping composite element;
wherein:
the layers forming the damping composite element include a metal layer and an elastically deformable damping layer;
the mounting support layer and the damping composite element layers all extend laterally, in a first direction, from (a) a first lateral coordinate at which a upper side of an outer surface of the fuel distributor is attached to a bottom side of the mounting support layer or a bottom side of the damping composite element to (b) a second lateral coordinate at which an upper side of the mounted structure is attached to the bottom side of the mounting support layer or the bottom side of the damping composite element, the fuel distributor and the mounted structure thereby being fastened to each other via the layered structure;
at the first lateral coordinate, a longitudinal axis of the fuel distributor extends in a second direction that is perpendicular to the first direction; and
at the first and second lateral coordinates, respectively, the fuel distributor and the mounted structure are, in a third direction that is perpendicular to the first and second directions, below an underside of the layered structure, and no part of the fuel distributor and no part of the mounted structure is over an upper side of the layered structure in the third direction.

6. The system as recited in claim 5 , wherein no part of the fuel distributor is above any part of the layered structure and no part of the mounted structure is above any part of the layered structure.

7. The system as recited in claim 5 , wherein the metal layer and the damping layer are connected to each other as a continuous material.

8. The system as recited in claim 5 , further comprising:
an adhesive layer, wherein the metal layer of the

Assignees

• Bosch Gmbh Robert

Inventors

• Fischer Michael
• Rehwald Andreas
• Mayer Michael
• Maess Matthias
• Guengoer Goekhan
• Kannan Venkatesh

Classifications

• F02M69/465

  of fuel rails · CPC title

• F02M2200/85

  Mounting of fuel injection apparatus · CPC title

• F02M2200/09

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

• F02M55/025 Primary

  Common rails · CPC title

• F02M55/04

  Means for damping vibrations {or pressure fluctuations} in injection pump inlets {or outlets} · CPC title