{
  "$type": "site.standard.document",
  "description": "A pump assembly for use in a compression ignition engine has a pumping plunger (110) that is reciprocable within a plunger bore (126) to cause pressurisation of fuel within a pump chamber (130) defined at one end of the plunger bore (126). The plunger (110) has a main plunger body (114) with a high…",
  "path": "/patents/1079103",
  "publishedAt": "2005-03-23T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02M59/442",
    "DELPHI TECH INC [US]"
  ],
  "textContent": "A pump assembly for use in a compression ignition engine has a pumping plunger (110) that is reciprocable within a plunger bore (126) to cause pressurisation of fuel within a pump chamber (130) defined at one end of the plunger bore (126). The plunger (110) has a main plunger body (114) with a high pressure end (122) and a low pressure end (120) and a drive stem (12) for cooperation with a cam drive to cause the plunger (110) the reciprocate, in use. A fuel collection volume (128) of the assembly communicates with a return path (132) for permitting leakage fuel from the pump chamber (130) to flow to low pressure. The plunger body (114) and the plunger bore (126) are shaped to define a first clearance between the high pressure end (122) of the main plunger body (114) and the plunger bore (126) and a second clearance between the low pressure end (120) of the main plunger body (114) and the plunger bore (126). The first and second clearances have different sizes so that any distortion of the main plunger body (114) and/or of the plunger bore (126) can be accommodated. The relative sizing of the clearances is selected so as to accommodate distortion at whichever of the high or low pressure ends it is focused.",
  "title": "Pump assembly"
}