{
  "$type": "site.standard.document",
  "description": "The present invention provides a process and a device for regeneration of a nitrogen oxides storage catalyst arranged in the exhaust system of a diesel engine. The process comprises a first and a second regeneration strategy wherein the first regeneration strategy is applied when the exhaust gas…",
  "path": "/patents/1089888",
  "publishedAt": "2004-02-04T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B01D53/94",
    "UMICORE AG & CO KG [DE]"
  ],
  "textContent": "The present invention provides a process and a device for regeneration of a nitrogen oxides storage catalyst arranged in the exhaust system of a diesel engine. The process comprises a first and a second regeneration strategy wherein the first regeneration strategy is applied when the exhaust gas temperature is above a threshold value and comprises changing the air/fuel ratio from a lean to a rich value during a first regeneration period and wherein the second regeneration strategy is applied when the exhaust gas temperature is below said threshold value and comprises switching the air/fuel-ratio between said lean and said rich air/fuel-ratio back and forth forming a sequence of rich/lean-pulses with a number of 2 to 10 rich/lean pulses during a second regeneration period.",
  "title": "Process for regenerating a nitrogen oxides storage catalyst"
}