{
  "$type": "site.standard.document",
  "description": "An exhaust gas for decision is generated, when the operating condition of the engine is within a deterioration decision zone and is of stationary operation. The direct reduction type nitrous oxide (NOx) catalyst is judged as deteriorated, when the concentration of NOx in exhaust gas for decision…",
  "path": "/patents/1081257",
  "publishedAt": "2004-12-29T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B01D53/9495",
    "ISUZU MOTORS LTD [JP]"
  ],
  "textContent": "An exhaust gas for decision is generated, when the operating condition of the engine is within a deterioration decision zone and is of stationary operation. The direct reduction type nitrous oxide (NOx) catalyst is judged as deteriorated, when the concentration of NOx in exhaust gas for decision through the direct reduction type NOx catalyst exceeds predetermined decision level. An independent claim is also included for the unit for deciding on catalyst deterioration in NOx purging system.",
  "title": "METHOD OF DECIDING ON CATALYST DETERIORATION AND MEANS FOR DECIDING ON CATALYST DETERIORATION IN NOx PURGING SYSTEM"
}