{
  "$type": "site.standard.document",
  "description": "Provided is an electromagnetic fuel injection valve capable of reducing fuel injection amount fluctuations by flattening chromium-coated impact surfaces of a movable core that impact with a stationary core or a valve plug. A movable valve element comprises a movable core, which has a cylindrical…",
  "path": "/patents/998967",
  "publishedAt": "2012-08-29T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02M51/0614",
    "HITACHI AUTOMOTIVE SYSTEMS LTD [JP]"
  ],
  "textContent": "Provided is an electromagnetic fuel injection valve capable of reducing fuel injection amount fluctuations by flattening chromium-coated impact surfaces of a movable core that impact with a stationary core or a valve plug. A movable valve element comprises a movable core, which has a cylindrical structure, and a valve plug, which is formed separate from the movable core and retained on a hollow side of the movable core to reciprocate together with the movable core with the electromagnetic attractive force and a force of a return spring. The movable core has a first impact surface, which impacts with the end face of the stationary core, and a second impact surface, which impacts with a retained surface of the valve plug, the first and second impact surfaces being coated with a chromium film layer. The chromium film layer is formed by setting a positive electrode for plating on a central axis line of the movable core. An end face of a movable core base material, on which at least either the first impact surface or the second impact surface is formed, has a sloped surface having a reverse gradient amount with respect to a gradient amount of the chromium film layer whose thickness gradually increases toward a central axis line of the movable core, and thereby the chromium film layer is formed on the sloped surface of the end face of the movable core base material so that at least either the first impact surface or the second impact surface has a flat surface with little slope.",
  "title": "ELECTROMAGNETIC FUEL INJECTION VALVE"
}