{
  "$type": "site.standard.document",
  "description": "Provided is a spark-ignition internal combustion engine capable of ensuring engine output power while setting a geometric compression ratio of an engine body to a high value. In the spark-ignition internal combustion engine, each of a clearance between a top surface (3a) of a piston (3) located at…",
  "path": "/patents/1013455",
  "publishedAt": "2011-04-27T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02B23/104",
    "MAZDA MOTOR [JP]"
  ],
  "textContent": "Provided is a spark-ignition internal combustion engine capable of ensuring engine output power while setting a geometric compression ratio of an engine body to a high value. In the spark-ignition internal combustion engine, each of a clearance between a top surface (3a) of a piston (3) located at a top dead center position and a lower surface (8a) of each of two intake valves (8) in a full-closed state, and a clearance between the top surface (3a) of the piston (3) located at the top dead center position and a lower surface (9a) of each of two exhaust valves (9) in a full-closed state, is set to 5 mm or more, and a stroke length S of the piston (3) is set to satisfy the following relation: S ¤ 0,977 × B + 18.2, where B is a bore diameter of a cylinder.",
  "title": "Spark-ignition internal combustion engine"
}