Actuation device, in particular electronic actuator

{
  "publication_number": "US9822695B2",
  "country": "US",
  "kind": "B2",
  "title": "Actuation device, in particular electronic actuator",
  "abstract": "An actuation device (1), in particular electronic actuator, having a housing (2); and having an actuation shank which has a first shank portion guided in the housing (2), and which has a second shank portion (3) projecting out of the housing (2), wherein a shielding cap (4) is provided which is fastened to the housing (2) and which surrounds the second shank portion (3) with the exception of a fastening region (5).",
  "claims": [
    "1. An electronic actuation device (1) having a housing (2); and an actuation shank, which has a first shank portion guided in the housing (2) and a second shank portion (3) projecting out of the housing (2), wherein a shielding cap (4) is provided which is fastened to the housing (2) and which at least partially surrounds the second shank portion (3) with the exception of a fastening region (5), wherein the shielding cap (4) has cooling and water outlet bores (8, 9, 10, 11).",
    "2. The electronic actuation device as claimed in claim 1, wherein the shielding cap (4) has two interconnected first and second cylinder portions (6, 7) with different diameters (D 1, D 2).",
    "3. The electronic actuation device as claimed in claim 2, wherein a flanged portion (13) is arranged around an end-side opening (14) of the second cylinder portion (7).",
    "4. The electronic actuation device as claimed in claim 3, wherein the flanged portion (13) is provided with openings (15, 16, 17).",
    "5. The electronic actuation device as claimed in claim 1, wherein the shielding cap (4) is screwed to the housing (2).",
    "6. The electronic actuation device as claimed in claim 1, wherein the fastening portion (5) is connected via a redirecting device (20) to a coupling rod (26).",
    "7. The electronic actuation device as claimed in claim 1, wherein the actuation shank is produced from plastic or metal.",
    "8. An electronic actuation device (1) having a housing (2); and an actuation shank, which has a first shank portion guided in the housing (2) and a second shank portion (3) projecting out of the housing (2), wherein a shielding cap (4) is provided which is fastened to the housing (2) and which partially surrounds the second shank portion (3) with the exception of a fastening region (5), the shielding cap (4) has two interconnected first and second cylinder portions (6, 7) with different diameters (D 1, D 2), and a twist prevention means (12) is formed as an opening in the second cylinder portion (7).",
    "9. The electronic actuation device as claimed in claim 8, wherein the shielding cap (4) has cooling and water outlet bores (8, 9, 10, 11).",
    "10. An exhaust-gas turbocharger (30) having an electronic actuation device (1) which has a housing (2) and an actuation shank which has a first shank portion guided in the housing (2) and a second shank portion (3) projecting out of the housing (2), wherein a shielding cap (4) is provided which is fastened to the housing (2) and which at least partially surrounds the second shank portion (3) with the exception of a fastening region (5), wherein the shielding cap (4) has cooling and water outlet bores (8, 9, 10, 11).",
    "11. The exhaust-gas turbocharger as claimed in claim 10, wherein the shielding cap (4) has two interconnected first and second cylinder portions (6, 7) with different diameters (D 1, D 2).",
    "12. The exhaust-gas turbocharger as claimed in claim 11, wherein a flanged portion (13) is arranged around an end-side opening (14) of the second cylinder portion (7).",
    "13. The exhaust-gas turbocharger as claimed in claim 12, wherein the flanged portion (13) is provided with openings (15, 16, 17).",
    "14. The exhaust-gas turbocharger as claimed in claim 10, wherein the shielding cap (4) is screwed to the housing (2).",
    "15. The exhaust-gas turbocharger as claimed in claim 10, wherein the fastening portion (5) is connected via a redirecting device (20) to a coupling rod (26).",
    "16. The exhaust-gas turbocharger as claimed in claim 10, wherein the actuation shank is produced from plastic or metal.",
    "17. An exhaust-gas turbocharger (30) having an electronic actuation device (1) which has a housing (2) and an actuation shank which has a first shank portion guided in the housing (2) and a second shank portion (3) projecting out of the housing (2), wherein a shielding cap (4) is provided which is fastened to the housing (2) and which partially surrounds the second shank portion (3) with the exception of a fastening region (5), wherein the shielding cap (4) has two interconnected first and second cylinder portions (6, 7) with different diameters (D 1, D 2), and wherein a twist prevention means (12) is formed as an opening in the second cylinder portion (7).",
    "18. The exhaust-gas turbocharger as claimed in claim 17, wherein the shielding cap (4) has cooling and water outlet bores (8, 9, 10, 11)."
  ],
  "description_excerpt": "The invention relates to an actuation device, in particular in the form of an electronic actuator.\n\nSuch actuation devices are used for example in exhaust-gas turbochargers in order to open and close wastegate flaps. The actuation shank of such actuation devices may warm up owing to high ambient temperatures, such as for example in an engine bay, which firstly can adversely affect the actuation shank itself and secondly can result in an introduction of heat into the housing of the actuation device as a result of heat conduction via the actuation shank.\n\nIt is therefore an object of the present invention to provide an actuation device which makes it possible for the actuation shank of the actuation device to be protected against adverse effects of heat.\n\nThis object is achieved by the features of claim 1.\n\nThe shielding cap of the actuation device according to the invention has the task of forming a heat shield for the actuation shank in order to protect the latter against elevated temperatures from the environment of the actuation device.\n\nFurthermore, the shielding cap advantageously provides protection against possible ingress of relatively large amounts of contaminated water, and also prevents fouling of the actuation shank.\n\nThe dependent claims contain advantageous developments of the invention.\n\nThe shielding cap (shielding plate) may preferably be provided with cooling bores and/or with water outlet bores.",
  "cpc": [
    "F02B 37/186",
    "F04D 17/122",
    "F04D 27/009",
    "H01F 7/129",
    "Y02T 10/12",
    "Y02T 10/144"
  ],
  "ipc": [
    "F04D 17/12",
    "F04D 27/00",
    "H01F 7/129",
    "F02B 37/18"
  ],
  "assignees": [
    "BorgWarner Inc"
  ],
  "inventors": [
    "Jochen Kraemer",
    "Hans-Joerg Fetzer"
  ],
  "filing_date": "2013-09-11",
  "publication_date": "2017-11-21",
  "grant_date": "2017-11-21",
  "priority_date": "2012-09-19",
  "application_number": "US-201314425668-A",
  "family_id": "50341863",
  "cited_by_count": 3,
  "citations": [
    "US4630445A",
    "US5063744A",
    "US5152145A",
    "US20070209363A1",
    "KR20080014780A",
    "US20090226304A1",
    "KR20070076772A",
    "US20100071435A1",
    "KR20120067475A"
  ]
}