{
  "$type": "site.standard.document",
  "description": "A pressure sensor is provided in a purge pipe connecting a fuel tank to a canister, so that the pressure sensor outputs an electrical signal of a first sensor value depending on an inside pressure of the canister. A control unit calculates an estimated sealed pressure, which corresponds to the…",
  "path": "/patents/1203176",
  "publishedAt": "2018-03-22T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02M25/0818",
    "DENSO CORPORATION"
  ],
  "textContent": "A pressure sensor is provided in a purge pipe connecting a fuel tank to a canister, so that the pressure sensor outputs an electrical signal of a first sensor value depending on an inside pressure of the canister. A control unit calculates an estimated sealed pressure, which corresponds to the inside pressure of the canister in a condition that the canister and the fuel tank are in a sealed condition. The control unit determines that there is no leakage of fuel vapor, when the first sensor value is out of a first pressure range. The control unit determines that there is a small leakage of the fuel vapor, when the first sensor value is within the first pressure range but out of a second pressure range, wherein the second pressure range is smaller than the first pressure range. The control unit determines that there is a large leakage or a blocked-up condition in the purge pipe when the first sensor value is within the second pressure range.",
  "title": "VAPORIZED FUEL PROCESSING APPARATUS"
}