{
  "$type": "site.standard.document",
  "description": "Provided is an exhaust injection control method for an exhaust gas aftertreatment device that can perform optimal exhaust pipe injection in accordance with a catalyst temperature and a degree of catalyst deterioration when exhaust pipe injection is performed during DPF regeneration. When PM has…",
  "path": "/patents/953229",
  "publishedAt": "2016-02-24T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F01N3/0253",
    "ISUZU MOTORS LTD [JP]"
  ],
  "textContent": "Provided is an exhaust injection control method for an exhaust gas aftertreatment device that can perform optimal exhaust pipe injection in accordance with a catalyst temperature and a degree of catalyst deterioration when exhaust pipe injection is performed during DPF regeneration. When PM has accumulated on a DPF (27), multiple-injection, post injection, and exhaust pipe injection are performed such that a reduction gas is burned in a DOC (25) to raise the exhaust gas temperature, burn the PM accumulated on the DPF (27), and regenerate the DPF (27). A light-off performance map (36) is prepared, in advance, by determining burning efficiency relative to DOC temperature during the post injection and the exhaust pipe injection both when the catalyst is fresh and when the catalyst has deteriorated. The catalyst temperature suitable for the exhaust pipe injection is set from the degree of the catalyst deterioration on the basis of the light-off performance map (36). The multiple-injection and/or the post injection is performed when the catalyst temperature is less than the set temperature, and the exhaust pipe injection is performed when the catalyst temperature is equal to or greater than the set temperature.",
  "title": "EXHAUST INJECTION CONTROL METHOD FOR EXHAUST GAS POST-TREATMENT DEVICE"
}