{
  "$type": "site.standard.document",
  "description": "A four-wheel-drive vehicle includes a dog clutch provided between a propeller shaft and an engine, a torque coupling provided between a rear differential and rear wheels, and an ECU that controls the dog clutch and the torque coupling. When a drive mode is switched from a two-wheel-drive mode where…",
  "path": "/patents/984158",
  "publishedAt": "2013-09-04T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60K17/34",
    "JTEKT CORP [JP]"
  ],
  "textContent": "A four-wheel-drive vehicle includes a dog clutch provided between a propeller shaft and an engine, a torque coupling provided between a rear differential and rear wheels, and an ECU that controls the dog clutch and the torque coupling. When a drive mode is switched from a two-wheel-drive mode where the transmissions of torque by the dog clutch and the torque coupling are both interrupted, to a four-wheel-drive mode, the ECU sets the amount of torque that is transmitted by the torque coupling to a first torque value (T 1 ) to increase the speed of rotation of the propeller shaft, and then sets the amount of torque that is transmitted by the torque coupling to a second torque value (T 2 ) that is lower than the first torque value (T 1 ), and engages the dog clutch when the rotations of first and second rotary members of the dog clutch are synchronized with each other.",
  "title": "Four-wheel-drive vehicle and control unit for four-wheel-drive vehicle"
}