{
  "$type": "site.standard.document",
  "description": "A system and method for reducing brake drag in vehicles equipped with electronic parking brakes (EPB) is disclosed. The system includes an EPB, a brake caliper with a piston having a seal groove containing a seal, a hydraulic brake system, and a controller. The controller detects EPB commands and…",
  "path": "/patents/1381000",
  "publishedAt": "2026-04-16T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60T13/745",
    "Tesla, Inc."
  ],
  "textContent": "A system and method for reducing brake drag in vehicles equipped with electronic parking brakes (EPB) is disclosed. The system includes an EPB, a brake caliper with a piston having a seal groove containing a seal, a hydraulic brake system, and a controller. The controller detects EPB commands and causes the hydraulic brake system to increase pressure to a target level that displaces the seal within the seal groove. This displacement stores elastic potential energy in the seal, enabling improved piston retraction when the EPB is released. The method involves detecting EPB commands, increasing hydraulic pressure to the target level, and maintaining the pressure for a predetermined time during EPB operation. The system and method aim to reduce brake drag variability, improve vehicle efficiency, and enhance range by optimizing brake pad retraction after EPB engagement and release cycles.",
  "title": "HYDRAULIC OVERLAY SYSTEM FOR REDUCING BRAKE DRAG"
}