{
  "$type": "site.standard.document",
  "description": "Disclosed is an exhaust gas purification system for a working machine. The system is provided with a filter (20) for capturing particulate matter contained in exhaust gas from an engine, a differential pressure sensor (21) for detecting a differential pressure between an exhaust upstream side and…",
  "path": "/patents/998617",
  "publishedAt": "2012-09-05T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "E02F9/0866",
    "HITACHI CONSTRUCTION MACHINERY [JP]"
  ],
  "textContent": "Disclosed is an exhaust gas purification system for a working machine. The system is provided with a filter (20) for capturing particulate matter contained in exhaust gas from an engine, a differential pressure sensor (21) for detecting a differential pressure between an exhaust upstream side and an exhaust downstream side of the filter, and a controller (22) having a regeneration determination unit for determining whether or not a time, at which forced regeneration is needed, has been reached. The controller includes one that has a variation determination unit for determining whether or not a state quantity relevant to an operation of the engine, for example, an engine speed has varied abruptly and that, when the state quantity is determined to have abruptly varied, performs processing to invalidate the determination by the regeneration determination unit during a predetermined time in which an effect of the state quantity is considered to diminish.",
  "title": "Exhaust gas purification system for working machine"
}