{
  "$type": "site.standard.document",
  "description": "The present invention relates to an internal combustion engine control method, wherein satisfactory restartability has not been obtained so far because the timing of opening an exhaust valve (9) of a cylinder (4) under expansion stroke is adjusted for improvement of startability and a valve…",
  "path": "/patents/1078226",
  "publishedAt": "2005-04-27T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02D41/065",
    "HITACHI LTD [JP]"
  ],
  "textContent": "The present invention relates to an internal combustion engine control method, wherein satisfactory restartability has not been obtained so far because the timing of opening an exhaust valve (9) of a cylinder (4) under expansion stroke is adjusted for improvement of startability and a valve adjusting mechanism (12, 28) is always controlled in the same manner regardless of the engine status at start. In the invention, control is performed to adjust the timing of closing an intake valve (8) so that an effective compression ratio of a cylinder (4) under compression stroke reduces. Also, the effective compression ratio of the compression stroke cylinder is decided based on a piston position at engine restart. By varying the intake valve closing timing in the expansion stroke cylinder to reduce the effective compression ratio depending on the engine status at restart, it is possible to lessen a load imposed on a starter (15) when the engine (1) is restarted, and to improve startability without complicating the engine system.",
  "title": "Internal combustion engine control method"
}