{
  "$type": "site.standard.document",
  "description": "Methods and systems are provided for indicating a presence or absence of degradation in a vehicle evaporative emissions system, where degradation includes a restriction in the evaporative emissions system and/or a source of undesired evaporative emissions. In one example, a method includes, under…",
  "path": "/patents/1248962",
  "publishedAt": "2019-11-28T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02D41/0032",
    "Ford Global Technologies, LLC"
  ],
  "textContent": "Methods and systems are provided for indicating a presence or absence of degradation in a vehicle evaporative emissions system, where degradation includes a restriction in the evaporative emissions system and/or a source of undesired evaporative emissions. In one example, a method includes, under conditions where an engine is not combusting air and fuel, applying a pressure from the evaporative emissions system to an intake of the engine, and indicating an absence of degradation in the evaporative emissions system based on a test flow in the intake of the engine being within a predetermined threshold of a baseline flow obtained at an earlier time via applying the pressure. In this way, a presence or absence of degradation may be indicated without relying on engine operation.",
  "title": "SYSTEMS AND METHODS FOR ONBOARD CANISTER PURGE VALVE FLOW MAPPING"
}