{
  "$type": "site.standard.document",
  "description": "An exhaust gas after-treatment method includes determining a regeneration condition of a particulate matter filter, eliminating trapped particulate matter to a predetermined amount by raising a temperature of exhaust gas to a first value so as to regenerate the particulate matter filter. An exhaust…",
  "path": "/patents/973797",
  "publishedAt": "2014-06-11T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F01N3/023",
    "HYUNDAI MOTOR CO LTD [KR]"
  ],
  "textContent": "An exhaust gas after-treatment method includes determining a regeneration condition of a particulate matter filter, eliminating trapped particulate matter to a predetermined amount by raising a temperature of exhaust gas to a first value so as to regenerate the particulate matter filter. An exhaust gas flows into a nitrogen oxide purifier is controlled in a lean condition (air/fuel ratio > 14.5) while the particulate matter filter is being regenerated sulfur components are eliminated from the nitrogen oxide purifier by controlling exhaust gas that flows into the nitrogen oxide purifier after the lean condition is performed. Subsequently, the lean condition and a rich condition (air/fuel ratio < 14.5), and then completes the regeneration of the particulate matter filter is completed or the elimination of the sulfur component from the nitrogen oxide purifier is completed.",
  "title": "Exhaust gas after-treatment method"
}