{
  "$type": "site.standard.document",
  "description": "Provided is a shut-off valve fault diagnosis device (6) that performs fault diagnosis of a shut-off valve (41) including a first valve body (103) that is opened in advance during power supply and a second valve body (104) that is opened due to a decrease in a differential pressure between upstream…",
  "path": "/patents/993613",
  "publishedAt": "2013-01-23T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02D19/022",
    "KEIHIN CORP [JP]"
  ],
  "textContent": "Provided is a shut-off valve fault diagnosis device (6) that performs fault diagnosis of a shut-off valve (41) including a first valve body (103) that is opened in advance during power supply and a second valve body (104) that is opened due to a decrease in a differential pressure between upstream and downstream after the opening. The shut-off valve fault diagnosis device (6) includes a diagnosis processing unit (66) that estimates an open and shut state of each of the first and second valve bodies (103, 104) from a time-variable characteristic in a downstream pressure of the shut-off valve (41), and performs the fault diagnosis of the shut-off valve (41) from an actual measurement value of the downstream pressure based on the estimation result.",
  "title": "SHUT-OFF VALVE FAULT DIAGNOSIS DEVICE"
}