{
  "$type": "site.standard.document",
  "description": "When a reducing agent is supplied from a supply valve into an exhaust port, an air-fuel ratio detected by an air-fuel ratio sensor becomes lower than an air-fuel ratio generated by fuel injected from a fuel injection valve into a combustion chamber. An estimated supply amount is obtained by…",
  "path": "/patents/1080056",
  "publishedAt": "2005-02-09T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F01N11/007",
    "TOYOTA MOTOR CO LTD [JP]"
  ],
  "textContent": "When a reducing agent is supplied from a supply valve into an exhaust port, an air-fuel ratio detected by an air-fuel ratio sensor becomes lower than an air-fuel ratio generated by fuel injected from a fuel injection valve into a combustion chamber. An estimated supply amount is obtained by periodically accumulating a reducing agent supply amount corresponding value which appears in the change in the air-fuel ratio, in step S186. Accordingly, the estimated supply amount can be obtained with high accuracy. Then, by comparing the estimated supply amount with a determination value in step S190, a supply error can be detected with high accuracy. As a result, an abnormal determination in step S194/a normal determination in step S196 concerning the supply valve can be performed accurately.",
  "title": "Reducing agent supply error detecting method for an exhaust gas control catalyst and corresponding detecting apparatus"
}