{
  "$type": "site.standard.document",
  "description": "An engine has four cylinders (2A-2D) each with a piston and a combustion chamber with a spark plug connected to the ignition circuit, while fuel is injected by an injector (9) with a needle valve and a solenoid. An oxygen sensor (23) connected to a three-way catalyst (24) measures the air-fuel…",
  "path": "/patents/1088079",
  "publishedAt": "2004-04-14T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F01L1/267",
    "MAZDA MOTOR [JP]"
  ],
  "textContent": "An engine has four cylinders (2A-2D) each with a piston and a combustion chamber with a spark plug connected to the ignition circuit, while fuel is injected by an injector (9) with a needle valve and a solenoid. An oxygen sensor (23) connected to a three-way catalyst (24) measures the air-fuel ratio and a control unit controls the fuel supply to the cylinders so that combustion is performed with a lean air-fuel mixture.",
  "title": "Spark-ignition engine controller"
}