{
  "$type": "site.standard.document",
  "coverImage": {
    "$type": "blob",
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  "description": "A work vehicle includes: a hydraulic pump (11) driven by an engine (190); a rotational speed detection unit (13) that detects an actual rotational speed of the engine; an exhaust gas purification device (161) that purifies nitrogen oxide in exhaust gas discharged from the engine (190) using a…",
  "path": "/patents/951312",
  "publishedAt": "2015-04-08T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "E02F3/283",
    "HITACHI CONSTRUCTION MACHINERY [JP]"
  ],
  "textContent": "A work vehicle includes: a hydraulic pump (11) driven by an engine (190); a rotational speed detection unit (13) that detects an actual rotational speed of the engine; an exhaust gas purification device (161) that purifies nitrogen oxide in exhaust gas discharged from the engine (190) using a reducing agent solution (urea) stored in a reducing agent tank (162); a remaining amount detection device (163) that detects a remaining amount of the reducing agent solution in the reducing agent tank (162); a torque control unit that decreases output torque of the engine (190) according to decrease of the detected remaining amount of the reducing agent solution; wherein when the actual rotational speed of the engine (190) is not more than a threshold value, the torque control unit does not decrease the output torque of the engine regardless of the detected remaining amount of the reducing agent solution.",
  "title": "Torque reduction of an internal combustion engine in case of low level of urea in a work vehicle with selective catalyst reduction"
}