{
  "$type": "site.standard.document",
  "description": "An direct fuel injection spark ignition internal combustion engine comprises a fuel injection valve (11, 11', 11\") arranged at a substantially center part of an upper are of a combustion chamber (4), and a piston (3) having a crown surface with a cavity (3a) shaped so that a center axis of a…",
  "path": "/patents/1085902",
  "publishedAt": "2004-06-30T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02B17/005",
    "NISSAN MOTOR [JP]"
  ],
  "textContent": "An direct fuel injection spark ignition internal combustion engine comprises a fuel injection valve (11, 11', 11\") arranged at a substantially center part of an upper are of a combustion chamber (4), and a piston (3) having a crown surface with a cavity (3a) shaped so that a center axis of a substantially conical-shaped fuel stream injected from the fuel injection valve (11, 11', 11 \") is substantially coincident with a center axis of the piston (3). In a low-load stratified combustion operating region when spark ignition is executed, the fuel injection angle is increased to form a first combustible air-fuel mixture before the fuel stream collides against the cavity of the piston crown surface. In a high-load stratified combustion operating region, the fuel injection angle is reduced to form a second combustible air-fuel mixture after the fuel stream collides against the cavity of the piston crown surface.",
  "title": "Direct fuel injection engine"
}