{
  "$type": "site.standard.document",
  "description": "A fuel-injection system (2) for an internal-combustion engine has at least one fuel injector (1) with a fuel-metering servo valve (9) for controlling the discharge of fuel from a metering chamber (12), the fuel pressure in the metering chamber (12) controls an open/close needle (7) for carrying out…",
  "path": "/patents/1006258",
  "publishedAt": "2012-01-11T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02D41/20",
    "FIAT RICERCHE [IT]"
  ],
  "textContent": "A fuel-injection system (2) for an internal-combustion engine has at least one fuel injector (1) with a fuel-metering servo valve (9) for controlling the discharge of fuel from a metering chamber (12), the fuel pressure in the metering chamber (12) controls an open/close needle (7) for carrying out fuel injections into a cylinder; an electronic control unit (11) issues two electrical commands (S1,S2) separated by an electrical dwell time (DT), one for carrying out a pilot injection (P) and one for carrying out a main injection (M), such that the main injection (M) starts before the pilot injection (P) ends, while the open/close needle (7) remains at a lift value in which the fuel flow rate is negligible; in particular, the second electrical command (S2) is issued during a rebound phase (T) of an open/close element (15) of the fuel metering servo valve (9).",
  "title": "Fuel-injection system for an internal-combustion engine"
}