{
  "$type": "site.standard.document",
  "description": "A method that uses a dither signal (38) for reducing hysteresis effect in a variable cam timing system (10) is provided. The method includes the steps of: a) providing (82) a dither signal (38) having at least two switchable frequencies; b) determining (86) the frequency characteristics of an…",
  "path": "/patents/1090772",
  "publishedAt": "2004-01-02T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F01L1/34",
    "BORGWARNER INC [US]"
  ],
  "textContent": "A method that uses a dither signal (38) for reducing hysteresis effect in a variable cam timing system (10) is provided. The method includes the steps of: a) providing (82) a dither signal (38) having at least two switchable frequencies; b) determining (86) the frequency characteristics of an engine speed; c) determining (86) at least one frequency beating point in relation to a neighborhood (66) of an engine crank RPM values; and d) changing (88) the dither signal frequency when the engine is operating within the neighborhood (66) of the engine crank RPM values. Thereby frequency beating effect is reduced.",
  "title": "VCT solenoid dither frequency control"
}