{
  "$type": "site.standard.document",
  "description": "A control apparatus according to an embodiment of the present invention comprises urea-SCR catalyst 44, a urea-water supply section 46, a low pressure gas recirculating section including a low pressure EGR pipe 61 forming a low pressure EGR passage and a low pressure EGR valve 62, and a control…",
  "path": "/patents/976387",
  "publishedAt": "2014-04-09T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F01N3/18",
    "TOYOTA MOTOR CO LTD [JP]"
  ],
  "textContent": "A control apparatus according to an embodiment of the present invention comprises urea-SCR catalyst 44, a urea-water supply section 46, a low pressure gas recirculating section including a low pressure EGR pipe 61 forming a low pressure EGR passage and a low pressure EGR valve 62, and a control section. The control section controls, based on an engine operating parameter, \"an amount of a fuel supplied to the engine, and an opening degree of the low pressure EGR valve.\" The control section supplies the urea-water to the urea-SCR catalyst in such a manner that ammonia of an amount required for reducing nitrogen oxides contained in an exhaust gas in the urea-SCR catalyst is produced in the urea-SCR catalyst (urea-water for reducing nitrogen oxides supply control). Further, the control section supplies the urea-water to the urea-SCR catalyst, the amount of the urea-water being larger than that of the urea-water for reducing nitrogen oxides supply control when an amount of an acid condensed water produced by a gas passing through the low pressure EGR passage is equal to or larger than an acid condensed water amount threshold (urea-water for producing ammonia supply control). This allows the ammonia flowing out from the urea-SCR catalyst to neutralize the acid condensed water.",
  "title": "INTERNAL COMBUSTION ENGINE CONTROL APPARATUS"
}