{
  "$type": "site.standard.document",
  "description": "A diagnostic apparatus for an engine system includes: a fuel tank including a tank body portion storing fuel and provided with an tank internal pressure sensor, a fuel introduction pipe communicating with the tank body portion, and a check valve for restricting the backflow of fuel from the tank…",
  "path": "/patents/1379006",
  "publishedAt": "2026-03-05T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02D41/0037",
    "TOYOTA JIDOSHA KABUSHIKI KAISHA"
  ],
  "textContent": "A diagnostic apparatus for an engine system includes: a fuel tank including a tank body portion storing fuel and provided with an tank internal pressure sensor, a fuel introduction pipe communicating with the tank body portion, and a check valve for restricting the backflow of fuel from the tank body portion to the fuel introduction pipe; a determination unit for determining whether the tank internal pressure is equal to or higher than an atmospheric pressure in a state in which an engine is stopped and a valve closing command is issued to a sealing valve; a canister leak diagnosis part for performing a leak diagnosis of a canister when an affirmative determination is made in the determination part; and a tank leak diagnostic unit for performing a leak diagnosis of the fuel tank when a determination that there is no leak in the canister.",
  "title": "DIAGNOSTIC APPARATUS FOR ENGINE SYSTEM"
}