{
  "$type": "site.standard.document",
  "description": "A bypass valve (22) and vent valve (24) are connected in parallel with the normal flow path between a low-pressure fuel pump (12) and a high-pressure fuel pump (16). When a low fuel inlet pressure is detected the bypass valve (22) and vent valve (24) are opened. Gas is vented out of the fuel system…",
  "path": "/patents/1109446",
  "publishedAt": "2001-10-10T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02C7/232",
    "ROLLS ROYCE PLC [GB]"
  ],
  "textContent": "A bypass valve (22) and vent valve (24) are connected in parallel with the normal flow path between a low-pressure fuel pump (12) and a high-pressure fuel pump (16). When a low fuel inlet pressure is detected the bypass valve (22) and vent valve (24) are opened. Gas is vented out of the fuel system and bypasses a heat exchanger (14) between the low and high-pressure pumps (12 and 16), thus avoiding the need to overcome vapour lock between the two pumps. The vent valve (24) passes gas to a drain tank (26) and then closes to prevent the escape of fuel as the high-pressure pump (16) primes.",
  "title": "Fuel supply system"
}