{
  "$type": "site.standard.document",
  "description": "[Problem] To securely perform determinations of strokes of an engine. [Solving Means] A control apparatus for an engine measures a maximum pressure P2 and a minimum pressure P1 in an intake pipe during one revolution of a crankshaft and calculates a difference between the maximum pressure P2 and…",
  "path": "/patents/1001980",
  "publishedAt": "2012-05-30T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02D41/009",
    "KEIHIN CORP [JP]"
  ],
  "textContent": "[Problem] To securely perform determinations of strokes of an engine. [Solving Means] A control apparatus for an engine measures a maximum pressure P2 and a minimum pressure P1 in an intake pipe during one revolution of a crankshaft and calculates a difference between the maximum pressure P2 and the minimum pressure P1 as an intake-air-pressure fluctuation range DPMTDC. The control apparatus compares, with respect to a magnitude relation, a previous intake-air-pressure fluctuation range with a current intake-air-pressure fluctuation range. When variations in the magnitude relation between the intake-air-pressure fluctuation ranges DPMTDC occur three consecutive times, the control apparatus makes a stroke determination, and determines that the engine is in expansion and exhaust strokes when a variation in the intake-air-pressure fluctuation ranges DPMTDC is from large to small.",
  "title": "CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE"
}