System having a fuel distributor and a holder

{
  "publication_number": "US9429121B2",
  "country": "US",
  "kind": "B2",
  "title": "System having a fuel distributor and a holder",
  "abstract": "A fuel injection system for high-pressure injection in internal combustion engines includes: a fuel distributor; and at least one holder which is used for fastening the fuel distributor to an add-on structure. The holder includes a holder body which has a first layer, a second layer, and an elastically deformable damping layer. The first layer and the second layer are made from a metallic material. The elastically deformable damping layer is disposed between the first layer and the second layer. The holder body is connected to the fuel distributor by laser welding. The damping layer is made of a visco-elastic material.",
  "claims": [
    "1. A fuel injection system for a high-pressure injection in an internal combustion engine, comprising: a fuel distributor; and a holder for fastening the fuel distributor to an add-on structure, wherein the holder has a holder body, the holder body having a first layer which is at least essentially made from a metallic material, at least one second layer which is at least essentially made of a metallic material, and at least one elastically deformable damping layer situated between the first layer and the second layer, and wherein the holder body is connected to the fuel distributor by welding.",
    "2. The system as recited in claim 1, wherein the holder body is connected to the fuel distributor by laser welding.",
    "3. The system as recited in claim 1, wherein an outer side of the holder body facing the fuel distributor is provided at the first layer in at least a connection region of the welded connection between the holder body and the fuel distributor, and the first layer of the holder body is connected to the fuel distributor by welding.",
    "4. The system as recited in claim 3, wherein the elastically deformable damping layer and the second layer are omitted in the connection region.",
    "5. The system as recited in claim 3, wherein the first layer of the holder body is configured as an externally situated first layer.",
    "6. The system as recited in claim 5, wherein the holder body has at least one third layer which is at least essentially made of a metallic material and at least one further elastically deformable damping layer, and wherein the second layer of the holder body is configured as an internally situated second layer, and the at least one further elastically deformable damping layer is situated between the internally situated second layer and the third layer.",
    "7. The system as recited in claim 3, wherein the holder body is configured approximately in strip form.",
    "8. The system as recited in claim 3, wherein the fuel distributor is configured as fuel distributor rail, the holder body is connected to the fuel distributor along a longitudinal axis of the fuel distributor, and securing tabs are provided on the holder body, and wherein the holder body is fastened to the add-on structure via the securing tabs.",
    "9. The system as recited in claim 3, wherein at least in a connection region of the welding connection between the holder body and the fuel distributor, the fuel distributor has an outer side which is not planar, and the holder body is premolded on the non-planar outer side of the fuel distributor at least in the connection region.",
    "10. The system as recited in claim 6, wherein the elastically deformable damping layer is made of a visco-elastic material."
  ],
  "description_excerpt": "1. Field of the Invention\n\nThe present invention generally relates to a system that has a fuel distributor and a holder, which is used to fasten the fuel distributor to an add-on structure, especially of an internal combustion engine, and particularly relates to the field of fuel injection systems for the high-pressure injection in internal combustion engines.\n\n2. Description of the Related Art\n\nOne fuel-injection device is known from published German patent application document DE 10 2005 009 740 A1. The known fuel-injection device is characterized by a sound-decoupling design. In this particular case, a fuel distributor line is fastened to a cylinder head of an internal combustion engine with the aid of connecting means. At least one damping disk is provided in the region of the connecting means. Such damping disks may be situated in the area below a screw head of the connection means, with seating directly on the fuel distributor line or with seating directly on the cylinder head, so that the high-pressure injection system, made up of the fuel distributor line and a plurality of fuel injection valves, is even more effectively decoupled from the cylinder head and has better sound-insulation.\n\nThe fuel-injection device known from published German patent application document DE 10 2005 009 740 A1 has the disadvantage that considerable loading of the damping disks can arise in the region where the fuel distributor line is fastened to the cylinder head, via a tightening torque of the connecting means, which leads to premature fatigue over the course of the service life.",
  "cpc": [
    "F02M 55/005",
    "F02M 2200/09",
    "F02M 2200/857",
    "F02M 2200/9015",
    "F02M 55/025",
    "F02M 61/14",
    "F02M 69/465"
  ],
  "ipc": [
    "F02M 55/00",
    "F02M 61/14",
    "F02M 55/02",
    "F02M 69/46"
  ],
  "assignees": [
    "Robert Bosch GmbH"
  ],
  "inventors": [
    "Michael Fischer",
    "Andreas Rehwald",
    "Matthias Maess",
    "Venkatesh Kannan"
  ],
  "filing_date": "2013-04-02",
  "publication_date": "2016-08-30",
  "grant_date": "2016-08-30",
  "priority_date": "2012-04-26",
  "application_number": "US-201314396575-A",
  "family_id": "48095812",
  "cited_by_count": 1,
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  ]
}