{
  "$type": "site.standard.document",
  "description": "A machine (100) comprising a clutch (112), an engine (102) operable at a resonant frequency engine speed, and a hybrid motor (118). The hybrid motor is connected to the engine through the clutch. The hybrid motor applies power to the engine when the clutch is engaged, and does not apply power to…",
  "path": "/patents/979554",
  "publishedAt": "2014-01-15T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60W10/06",
    "CATERPILLAR INC [US]"
  ],
  "textContent": "A machine (100) comprising a clutch (112), an engine (102) operable at a resonant frequency engine speed, and a hybrid motor (118). The hybrid motor is connected to the engine through the clutch. The hybrid motor applies power to the engine when the clutch is engaged, and does not apply power to the engine when the clutch is disengaged. The hybrid motor is operable at a predetermined hybrid motor speed. An ignition switch (106) starts the hybrid motor. An electronic control module (124) disengages the clutch until the hybrid motor speed exceeds the predetermined hybrid motor speed, and engages the clutch after the hybrid motor speed exceeds the predetermined hybrid motor speed.",
  "title": "Engine starting Strategy to avoid resonant Frequency"
}