{
  "$type": "site.standard.document",
  "description": "Process for diagnosing a NOx storage catalyst arranged in an exhaust gas channel of an I. C. engine comprises, when the vehicle is stationary, adjusting the catalyst temperature to a value in a region representing NOx storage, adjusting a NOx reference state of the storage catalyst to measure NOx…",
  "path": "/patents/1086559",
  "publishedAt": "2004-06-09T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F01N11/00",
    "VOLKSWAGEN AG [DE]"
  ],
  "textContent": "Process for diagnosing a NOx storage catalyst arranged in an exhaust gas channel of an I. C. engine comprises, when the vehicle is stationary, adjusting the catalyst temperature to a value in a region representing NOx storage, adjusting a NOx reference state of the storage catalyst to measure NOx lean conversion, impinging the catalyst with exhaust gas having a NOX mass stream greater than the theoretical value, carrying out a lean operating phase, measuring an exhaust gas characteristic parameter for NOx conversion using a sensor arranged downstream of the catalyst, determining the condition of the catalyst depending on the measuring values of the exhaust gas characteristic parameter, and outputting the condition value of via a diagnostic interface. An Independent claim is also included for a device for diagnosing a NOx storage catalyst arranged in an exhaust gas channel of an I. C. engine.",
  "title": "Process and device for diagnosing a NOx-catalyst-absorber in a stationery vehicle"
}