{
  "$type": "site.standard.document",
  "description": "An oxidation catalyst (12) is disposed in an exhaust passage (11) positioned upstream of a DPF (13), the oxidation catalyst (12) is used to cause combustion of a post-injection fuel, and heat generated in the combustion is utilized to raise the temperature of the DPF (13), thereby combusting soot…",
  "path": "/patents/1090022",
  "publishedAt": "2004-01-28T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02D41/005",
    "MAZDA MOTOR [JP]"
  ],
  "textContent": "An oxidation catalyst (12) is disposed in an exhaust passage (11) positioned upstream of a DPF (13), the oxidation catalyst (12) is used to cause combustion of a post-injection fuel, and heat generated in the combustion is utilized to raise the temperature of the DPF (13), thereby combusting soot. When the temperature of the oxidation catalyst (12) is equal to or less than a predetermined temperature (To), the post-injection is restricted. Thereby, non-combusted fuel is prevented from reaching the DPF (13). This prevents the DPF (13) from cracking that can occur when non-combusted fuel is ignition-combusted in the DPF (13).",
  "title": "Engine exhaust gas purification apparatus"
}