{
  "$type": "site.standard.document",
  "description": "A control device for an internal combustion engine switches an air-fuel ratio of an air-fuel mixture in a cylinder from a first air-fuel ratio leaner than stoichiometry for normal operation to a second air-fuel ratio richer than the stoichiometry. During a switching period from beginning to end of…",
  "path": "/patents/993965",
  "publishedAt": "2013-01-16T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02D41/025",
    "TOYOTA MOTOR CO LTD [JP]"
  ],
  "textContent": "A control device for an internal combustion engine switches an air-fuel ratio of an air-fuel mixture in a cylinder from a first air-fuel ratio leaner than stoichiometry for normal operation to a second air-fuel ratio richer than the stoichiometry. During a switching period from beginning to end of the switching, the control device carries out intake throttling to control the air-fuel ratio of the air-fuel mixture in the cylinder to a third air-fuel ratio richer than the first air-fuel ratio and leaner than the stoichiometry, while learning a correction value for a fuel injection amount. During the switching period, before the intake throttling is completed, the control device carries out such a post-injection as prevents injected fuel from being combusted and learns the correction value. After the intake throttling is completed, the control device carries out such an after-injection as allows the injected fuel to be incompletely combusted and learns the correction value.",
  "title": "CONTROLLER FOR INTERNAL COMBUSTION ENGINE"
}