Support of a fuel pump in a fuel tank of a motor vehicle

{
  "publication_number": "US4768925A",
  "country": "US",
  "kind": "A",
  "title": "Support of a fuel pump in a fuel tank of a motor vehicle",
  "abstract": "A support of an intank pump at a pump support, which includes webs of elastic material that extend from the pump to the pump support in a direction deviating at an angle α from the radial which is determined by the longitudinal axis of the fuel pump. During swelling of the webs by the fuel, a rotary movement is thereby imparted to the pump without influencing the suction height. The webs may thereby have a relatively large volume as a result of which a good damping is achieved.",
  "claims": [
    "1. A mounting arrangement for an electrically driven fuel pump which is immersible in fuel in a fuel tank, said mounting arrangement comprising: pump support means fixedly disposable in a fuel tank, and a plurality of damping web means of substantially equal length and extendable from outer circumferential portions of a pump to said support means to support the pump in position on the support means, said damping web means all extending at approximately the same angle with respect to respective radii extending from a longitudinal axis of a fuel pump being supported thereby to respective support connections of radial outer ends of the damping web means at the pump support means, whereby expansion movements of the damping web means are accommodated by rotational movement of a pump being supported about its longitudinal axis without substantially changing its axial position.",
    "2. A mounting arrangement according to claim 1, wherein said web means all have an approximately similar cross section.",
    "3. A mounting arrangement according to claim 2, wherein the fuel pump includes a cylindrical housing and the web means extend substantially tangentially to the housing.",
    "4. A mounting arrangement according to claim 3, wherein said housing is seated in a mounting means and the web means are secured at the mounting means.",
    "5. A mounting arrangement according to claim 4, wherein the elastic material from which the web means are made is NBR or ECO.",
    "6. A mounting arrangement according to claim 5, wherein said support means is formed by a pot arranged at a bottom of the fuel tank.",
    "7. A mounting arrangement according to claim 6, wherein the pot is a turbulence pot.",
    "8. A mounting arrangement according to claim 6, wherein the pot is a quieting pot.",
    "9. A mounting arrangement according to claim 1, wherein the fuel pump includes a cylindrical housing and the web means extend substantially tangentially to the housing.",
    "10. A mounting arrangement according to claim 9, wherein said web means all have an approximately similar cross section.",
    "11. A mounting arrangement according to claim 9, wherein said housing is seated in a mounting means and the web means are secured at the mounting means.",
    "12. A mounting arrangement according to claim 1, wherein the elastic material from which the web means are made is NBR or ECO.",
    "13. A mounting arrangement according to claim 1, wherein said support means is formed by a pot arranged at the bottom of the fuel tank.",
    "14. A mounting arrangement according to claim 13, wherein the pot is a turbulence pot.",
    "15. A mounting arrangement according to claim 13, wherein the pot is a quieting pot.",
    "16. An arrangement according to claim 1, wherein said angle is between 10 and 40 degrees.",
    "17. An arrangement according to claim 16, wherein said angle is approximately 40 degrees."
  ],
  "description_excerpt": "The present invention relates to the mounting of an electrically driven fuel pump immersed in the fuel of the fuel tank of a motor vehicle, in which the fuel pump is supported by way of damping elements of elastic material at a pump support that is secured in the fuel tank.\n\nElectrically driven fuel pumps which are submerged in the fuel of the fuel tank of a motor vehicle, are also designated as intank pumps. In motor vehicles with an injection system, the intank pump is arranged generally in a so-called swirl or turbulence pot, into which flows the hot return from the injection system for purposes of degassing. However, the intank pump can also be arranged in the guieting pot (splash baffle) of the fuel tank.\n\nIn order to conduct the pump noises in the least possible extent onto the fuel tank, the intank pump must be supported at the pump support, i.e., at the turbulence pot or at the quieting pot in a vibration-damping manner, i.e., must be elastically supported thereon.\n\nFor that purposes damping elements of fuel-resistant plastic materials such as NBR or ECO are used which are relatively inexpensive. The fastening of the pump at the pump support can take place, for example, in such a manner that arms are provided at the pump housing which rest on the pump support under interposition of such damping elements, for example, in the form of a disk.\n\nThe aforementioned relatively inexpensive plastic materials, however, entail the disadvantage that they swell in the fuel, and more particularly with swell values of 30 to 50%.",
  "cpc": [
    "F02M 37/10",
    "F02M 37/103",
    "F04D 29/606",
    "F16F 2236/027"
  ],
  "ipc": [
    "F02M 37/10",
    "F04D 29/60"
  ],
  "assignees": [
    "Bayerische Motoren Werke AG"
  ],
  "inventors": [
    "Helmut Geupel"
  ],
  "filing_date": "1987-01-23",
  "publication_date": "1988-09-06",
  "grant_date": "1988-09-06",
  "priority_date": "1986-01-24",
  "application_number": "US-606087-A",
  "family_id": "6292550",
  "cited_by_count": 49,
  "citations": [
    "US2936141A",
    "US3065941A",
    "DE2723771A1",
    "US4178955A",
    "DE2748963A1",
    "US4155529A",
    "DE3005535A1",
    "US4636669A"
  ]
}