{
  "$type": "site.standard.document",
  "description": "An internal combustion engine comprises an engine control unit (ECU) governing fuel supply to the combustion engine by a fuelling map, which adapts the amount of fuel supplied to the engine responsive to engine speed, engine load and a volumetric efficiency of the engine. A variable intake system…",
  "path": "/patents/1067522",
  "publishedAt": "2006-05-10T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02B27/02",
    "FORD GLOBAL TECH LLC [US]"
  ],
  "textContent": "An internal combustion engine comprises an engine control unit (ECU) governing fuel supply to the combustion engine by a fuelling map, which adapts the amount of fuel supplied to the engine responsive to engine speed, engine load and a volumetric efficiency of the engine. A variable intake system (100) with at least one valve (140', 150') changes an effective tuning length of said variable intake system (100), wherein failure of said variable intake system (100) can be diagnosed by means of comparing a calculated pressure variation of an inlet pressure of said variable intake system (100) with a predetermined value for the pressure variation. The engine control unit (ECU) adapts the fuelling map responsive to the diagnosis of failure of the at least one valve (140', 150') of the variable intake system (100).",
  "title": "Method for diagnosing variable intake system failure"
}