EP 1517039 A1 20050323 - Pump assembly
Title (en)
Pump assembly
Title (de)
Pumpenanordnung
Title (fr)
Ensemble de pompage
Publication
Application
Priority
EP 03255911 A 20030922
Abstract (en)
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. <IMAGE>
IPC 1-7
IPC 8 full level
F02M 59/44 (2006.01); F04B 1/04 (2006.01); F04B 53/00 (2006.01); F04B 53/04 (2006.01); F04B 53/14 (2006.01); F04B 53/16 (2006.01)
CPC (source: EP)
F02M 59/442 (2013.01); F04B 1/0408 (2013.01); F04B 53/008 (2013.01); F04B 53/04 (2013.01); F04B 53/14 (2013.01); F04B 53/162 (2013.01)
Citation (search report)
- [XA] DE 10045281 C1 20020523 - ORANGE GMBH [DE]
- [X] EP 1275848 A1 20030115 - BOSCH GMBH ROBERT [DE]
- [X] US 2002189589 A1 20021219 - KATO MASAAKI [JP], et al
- [A] EP 1323919 A2 20030702 - NISSAN MOTOR [JP]
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
DOCDB simple family (publication)
DOCDB simple family (application)
EP 03255911 A 20030922