{
  "$type": "site.standard.document",
  "description": "An exhaust gas purification device of an internal combustion engine arranging a catalyst (22) suitable for reduction of NOx in exhaust gas by ammonia in the presence of excess oxygen in an engine exhaust passage, said device comprising: feeding means (31,32,33) for feeding a liquid (30) containing…",
  "path": "/patents/1071904",
  "publishedAt": "2005-12-14T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B01D53/90",
    "TOYOTA MOTOR CO LTD [JP]"
  ],
  "textContent": "An exhaust gas purification device of an internal combustion engine arranging a catalyst (22) suitable for reduction of NOx in exhaust gas by ammonia in the presence of excess oxygen in an engine exhaust passage, said device comprising: feeding means (31,32,33) for feeding a liquid (30) containing an ammonia generating compound to the catalyst; feed control means (40) for controlling the amount of feed of the liquid, decision means (40) for deciding if the temperature of the catalyst is in an ammonia generating compound storage region, or if the temperature of the catalyst is in an ammonia release region which causes the ammonia to be released a little at a time from the stored ammonia generating compound; an exhaust gas recirculation device (24) for recirculating the exhaust gas in an intake passage; wherein, when it is decided by the decision means (40) that the temperature of the catalyst is in the ammonia generating compound storage region, said exhaust gas recirculation device (24) stops a recirculation action of the exhaust gas.",
  "title": "Exhaust emission control device of internal combustion engine"
}