{
  "$type": "site.standard.document",
  "description": "During start-up of an engine, a reverse rotation start-up operation is performed in which a crankshaft is rotated in a forward direction after being rotated in a reverse direction. An engine unit is controlled such that the reverse rotation start-up operation is performed again, in a case in which…",
  "path": "/patents/945598",
  "publishedAt": "2016-03-23T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02D13/0234",
    "YAMAHA MOTOR CO LTD [JP]"
  ],
  "textContent": "During start-up of an engine, a reverse rotation start-up operation is performed in which a crankshaft is rotated in a forward direction after being rotated in a reverse direction. An engine unit is controlled such that the reverse rotation start-up operation is performed again, in a case in which a rotation state detected by a rotation state detector does not satisfy a predetermined start-up condition when the crankshaft is rotated in the forward direction in the reverse rotation start-up operation and before a piston reaches a first compression top dead center. A fuel injection device injects fuel such that a fuel-air mixture is introduced into a combustion chamber from an intake passage through an intake port in at least the first reverse rotation operation. An ignition device ignites the fuel-air mixture in the combustion chamber.",
  "title": "ENGINE SYSTEM AND SADDLE-TYPE VEHICLE"
}