{
  "$type": "site.standard.document",
  "description": "An object of the present invention is to accurately control an air/fuel ratio and improve an exhaust gas purification rate even in an internal combustion engine that uses an alcohol-containing fuel. An exhaust emission control apparatus for an internal combustion engine of this invention includes…",
  "path": "/patents/987246",
  "publishedAt": "2013-08-21T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F01N11/00",
    "TOYOTA MOTOR CO LTD [JP]"
  ],
  "textContent": "An object of the present invention is to accurately control an air/fuel ratio and improve an exhaust gas purification rate even in an internal combustion engine that uses an alcohol-containing fuel. An exhaust emission control apparatus for an internal combustion engine of this invention includes: an exhaust gas purification catalyst that is arranged in an exhaust gas passage of the internal combustion engine; an air/fuel ratio sensor that is installed on an upstream side of the exhaust gas purification catalyst and detects an air/fuel ratio of an exhaust gas discharged from the internal combustion engine; air/fuel ratio feedback control means that performs feedback control of the air/fuel ratio of the internal combustion engine based on an output of the air/fuel ratio sensor; and sensor output correcting means that corrects a shift in the output of the air/fuel ratio sensor that is caused by a component included in the exhaust gas. The sensor output correcting means is configured so as to correct a shift in the output of the air/fuel ratio sensor using a lean shift amount of the air/fuel ratio sensor output in accordance with a quantity and/or a proportion of an aldehyde included in the exhaust gas.",
  "title": "EXHAUST GAS PURIFICATION DEVICE FOR INTERNAL COMBUSTION ENGINE"
}