{
  "$type": "site.standard.document",
  "description": "When an engine (1) operates in a low and medium load area and in a low and medium speed area, the combustion mode is established as a compression ignition combustion (S2) and when the engine (1) operates in other load and speed areas, the combustion mode is established as a spark ignition…",
  "path": "/patents/1102159",
  "publishedAt": "2002-08-28T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02B1/12",
    "FUJI HEAVY IND LTD [JP]"
  ],
  "textContent": "When an engine (1) operates in a low and medium load area and in a low and medium speed area, the combustion mode is established as a compression ignition combustion (S2) and when the engine (1) operates in other load and speed areas, the combustion mode is established as a spark ignition combustion (S3). Further, when the compression ignition combustion (S2) is performed, the mixture is stratified in the combustion chamber (3) and an ultra lean combustion is realized. As a result, both NOx reduction in an ultra lean condition and HC/CO reduction in an oxidation atmosphere can be obtained. On the other hand, when the spark ignition combustion (S3) is performed, a normal feedback control of the air-fuel ratio activates a three-way catalyst (29) to reduce HC, CO and NOx simultaneously.",
  "title": "Combustion control apparatus for engine"
}