{
  "$type": "site.standard.document",
  "description": "A degree of deviation between an actual air-fuel ratio and a value detected by an air-fuel ratio sensor is obtained as a difference dTHC between a target catalyst bed temperature THCt and a catalyst bed temperature THC (S118). The difference dTHC is converted to a target air-fuel ratio correction…",
  "path": "/patents/1077296",
  "publishedAt": "2005-06-01T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F01N3/0842",
    "TOYOTA MOTOR CO LTD [JP]"
  ],
  "textContent": "A degree of deviation between an actual air-fuel ratio and a value detected by an air-fuel ratio sensor is obtained as a difference dTHC between a target catalyst bed temperature THCt and a catalyst bed temperature THC (S118). The difference dTHC is converted to a target air-fuel ratio correction amount daft according to a target air-fuel ratio correction amount map Mapaft (S120). A target air-fuel ratio AFt is corrected using the target air-fuel ratio correction amount daft (S122), whereby the degree of deviation between the actual air-fuel ratio and the value detected by the air-fuel ratio sensor is reflected in an air-fuel ratio feedback control. Thus, even if there is a difference between the actual air-fuel ratio and a detected air-fuel ratio AF, the air-fuel ratio feedback control can be appropriately performed, and a catalyst control can be appropriately performed. Accordingly, it is possible to prevent a situation in which the catalyst cannot sufficiently recover from sulfur poisoning, or a situation in which smoke and hydrogen sulfide (H2S) are discharged.",
  "title": "Catalyst control apparatus for internal combustion engine and method for performing catalyst control"
}