{
  "$type": "site.standard.document",
  "description": "The invention relates to a method for operating an exhaust aftertreatment system for an internal combustion engine, in particular for a diesel engine, wherein an exhaust line (7) is provided with at least one SCR particulate filter (15), by means of which particles contained in an exhaust gas (9)…",
  "path": "/patents/928371",
  "publishedAt": "2017-04-05T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B01D46/0027",
    "MAN TRUCK & BUS AG [DE]"
  ],
  "textContent": "The invention relates to a method for operating an exhaust aftertreatment system for an internal combustion engine, in particular for a diesel engine, wherein an exhaust line (7) is provided with at least one SCR particulate filter (15), by means of which particles contained in an exhaust gas (9) of the internal combustion engine (5), in particular carbon particles, can be filtered out and stored from the exhaust gas (9), wherein nitrogen oxides contained in the exhaust gas (9) of the internal combustion engine (5) can be reduced by means of the SCR particulate filter (15) with ammonia as a reducing agent, wherein a first reducing agent supply device (22) is provided, by means of which the reducing agent, in particular in the form of an aqueous urea solution, can be introduced into the exhaust line (7) upstream of the SCR particulate filter (15) as seen in the direction of exhaust gas flow, wherein the SCR particulate filter (15) can be continuously regenerated with nitrogen dioxide as an oxidizing agent, wherein at least one SCR catalyst element (19) is arranged downstream of the SCR particulate filter (15), by means of which nitrogen oxides contained in the exhaust gas (9) of the internal combustion engine (5) can likewise be reduced with ammonia as a reducing agent, and wherein a second reducing agent supply device (26) is provided, by means of which the reducing agent, in particular in the form of an aqueous urea solution, can be introduced into the exhaust line (7) downstream of the SCR particulate filter (15) and upstream of the SCR catalyst element (19). According to the invention, a control device (25) is provided, by means of which the reducing agent quantity introduced into the exhaust line (7) by means of the first reducing agent supply device (22) and/or by means of the second reducing agent supply device (26) is regulated and/or controlled as a function of the temperature (T SCR-PF) of the SCR particulate filter (15).",
  "title": "METHOD FOR OPERATING A WASTE GAS TREATMENT SYSTEM"
}