{
  "$type": "site.standard.document",
  "coverImage": {
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  "description": "An exhaust gas after-treatment device 31 including an oxidation catalyst 31a and a DPF 31b in order from an upstream side is provided in an exhaust passage 15 of an internal combustion engine 10. A target value Et of an EGR rate E in EGR control is set to be a second EGR rate E2 higher than a first…",
  "path": "/patents/935006",
  "publishedAt": "2016-11-16T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F01N13/0097",
    "ISUZU MOTORS LTD [JP]"
  ],
  "textContent": "An exhaust gas after-treatment device 31 including an oxidation catalyst 31a and a DPF 31b in order from an upstream side is provided in an exhaust passage 15 of an internal combustion engine 10. A target value Et of an EGR rate E in EGR control is set to be a second EGR rate E2 higher than a first EGR rate E1 at the time of a normal operation of the internal combustion engine 10 and the EGR control is performed, in a case where a catalyst index temperature T that indexes a temperature of the oxidation catalyst 31a falls within a set temperature region Rab between a lower limit set temperature Ta and an upper limit set temperature Tb which are preliminarily set, and where an estimated PM deposition amount V of the DPF 31b is less than a preliminarily set regeneration start threshold value Vc, after an operation state of the internal combustion engine 10 transitions from a traveling operation state to an idling operation state. Thereby, in the idling operation state after travel of a vehicle, generation of NO 2 by the oxidation catalyst 31a included in the exhaust gas after-treatment device 31 of the exhaust passage 15 is decreased, and emission of NO 2 to the atmosphere is suppressed.",
  "title": "EXHAUST GAS PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE AND EXHAUST GAS PURIFICATION METHOD OF INTERNAL COMBUSTION ENGINE"
}