{
  "$type": "site.standard.document",
  "description": "A grille shutter device includes a shutter mechanism (11) provided within a grille opening portion formed at a front portion of a vehicle body and configured to control a flow rate of air into the vehicle body, a drive device (12) driven by a motor (18) to open and close the shutter mechanism, and…",
  "path": "/patents/983524",
  "publishedAt": "2013-10-09T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60K11/085",
    "AISIN SEIKI [JP]"
  ],
  "textContent": "A grille shutter device includes a shutter mechanism (11) provided within a grille opening portion formed at a front portion of a vehicle body and configured to control a flow rate of air into the vehicle body, a drive device (12) driven by a motor (18) to open and close the shutter mechanism, and a control device (20) supplying a driving power to the motor. The control device includes a drive circuit (22) provided at a portion of a power supply passage (Lp) between an in-vehicle power source (21) and the motor (18), a control circuit (23) controlling a duty ratio of the drive circuit (22), and a power supply voltage detection portion (27, 23) detecting a power supply voltage (Vb) of the in-vehicle power source. The control circuit includes a correction portion (23) correcting the duty ratio based on the power supply voltage (Vb) to restrain a change of a speed of the motor (18) caused by a fluctuation of the power supply voltage (Vb).",
  "title": "Grille shutter device at a front portion of a vehicle"
}