{
  "$type": "site.standard.document",
  "description": "A method for obtaining an accurate cylinder air-charge estimate is presented. First, a sensor-based powertrain. torque estimate is obtained. Next, a torque converter-based powertrain torque estimate is obtained when the torque converter clutch is unlocked. The two estimates are compared, and if…",
  "path": "/patents/1096532",
  "publishedAt": "2003-04-23T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02D41/021",
    "FORD GLOBAL TECH INC [US]"
  ],
  "textContent": "A method for obtaining an accurate cylinder air-charge estimate is presented. First, a sensor-based powertrain. torque estimate is obtained. Next, a torque converter-based powertrain torque estimate is obtained when the torque converter clutch is unlocked. The two estimates are compared, and if they differ by more than a predetermined amount sensor drift can be diagnosed and corrected.",
  "title": "A method for obtaining an estimate of air charge entering an engine and a method and system for diagnozing a sensor used in such a method"
}