{
  "$type": "site.standard.document",
  "description": "A brake system includes an air production module, a trailer control module, a park brakes relay valve and a supply coupling head for supplying air under pressure to brakes of a trailer. A trailer brakes relay valve is permanently supplied with air under pressure and controls supply of air under…",
  "path": "/patents/1385401",
  "publishedAt": "2026-06-04T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60T13/385",
    "Volvo Truck Corporation"
  ],
  "textContent": "A brake system includes an air production module, a trailer control module, a park brakes relay valve and a supply coupling head for supplying air under pressure to brakes of a trailer. A trailer brakes relay valve is permanently supplied with air under pressure and controls supply of air under pressure to the supply coupling head. The trailer brakes relay valve has two control input ports. When control air is applied to either one or both of the control input ports of the trailer brakes relay valve, the trailer brakes relay valve supplies air under pressure to the supply coupling head. When no control air is applied on both of the control ports of the trailer brakes relay valve, the trailer brakes relay valve does not supply air under pressure to the supply coupling head.",
  "title": "BRAKE SYSTEM, VEHICLE COMPRISING SUCH A BRAKE SYSTEM, AND METHOD FOR CONTROLLING BRAKES OF SUCH A VEHICLE"
}