{
  "$type": "site.standard.document",
  "description": "Method for monitoring an opening of an injection valve comprising a movable valve needle and preventing a fluid flow through a fluid outlet portion in a closing position and releasing the fluid flow through the fluid outlet portion in further positions, and an actuator unit with a coil and an…",
  "path": "/patents/981982",
  "publishedAt": "2013-11-13T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02D41/221",
    "CONTINENTAL AUTOMOTIVE GMBH [DE]"
  ],
  "textContent": "Method for monitoring an opening of an injection valve comprising a movable valve needle and preventing a fluid flow through a fluid outlet portion in a closing position and releasing the fluid flow through the fluid outlet portion in further positions, and an actuator unit with a coil and an armature, the armature being movable and being designed to actuate the valve needle. The method comprising the steps: actuating the actuator unit with a predetermined voltage signal at a given starting time, recording the current through the actuator unit, based on the recorded current and the starting time T_0 detecting a time T_1 where the gradient of the recorded profile of the current changes more than a first given threshold, based on the first gradient alteration time T_1 detecting a second time T_2 where the gradient of the recorded profile of the current changes more than a second given threshold, and dependent from the first time T_1 and the second time T_2 determining a diagnostic value which is representative for an erroneous respectively correct operation of the injection valve.",
  "title": "Method for monitoring an injection valve"
}