{
  "$type": "site.standard.document",
  "description": "In a hybrid vehicle in which a fixed speed change mode can be realized by the locking of a rotational element, the mislocking of the rotational element is prevented. A hybrid drive apparatus 10 which has an engine 200, a MG1 and a MG2 and which functions as a power unit of a hybrid vehicle 1 is…",
  "path": "/patents/1006117",
  "publishedAt": "2012-01-18T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60K6/365",
    "TOYOTA MOTOR CO LTD [JP]"
  ],
  "textContent": "In a hybrid vehicle in which a fixed speed change mode can be realized by the locking of a rotational element, the mislocking of the rotational element is prevented. A hybrid drive apparatus 10 which has an engine 200, a MG1 and a MG2 and which functions as a power unit of a hybrid vehicle 1 is provided with a brake mechanism 700 of a cam-lock type which can control the MG1 in a lock state and a non-lock state by changing the state of a sun gear S1 between the lock state and the non-lock state. In mislocking prevention control, an ECU 100 calculates MG1 angular acceleration DÉg, which is the absolute value of angular acceleration of the motor generator MG1, on the basis of a MG1 rotational speed Ngm1 and judges that the sun gear S1 is in a mislocking state if the MG1 angular acceleration DÉg is greater than a criterion value DÉgth.",
  "title": "DEVICE FOR PREVENTING FALSE LOCK"
}