EP 1363016 A2 20031119 - Fuel pump
Title (en)
Fuel pump
Title (de)
Kraftstoffpumpe
Title (fr)
Pompe à carburant
Publication
Application
Priority
GB 0209146 A 20020422
Abstract (en)
A fuel pump for use in a common rail fuel system for an internal combustion engine comprises a plurality of pump assemblies (12), each of which has a pumping plunger (14) which is reciprocable within a respective plunger bore under the influence of an associated drive arrangement (20, 22, 24) to perform a pumping cycle during which fuel within a respective pumping chamber (18) is pressurised to a relatively high level. The drive arrangement for each pump assembly is arranged to impart reciprocating movement to the associated pumping plunger (14) upon co-operation with a cam surface. At least one of the pumping plunger (14) and the plunger bore is provided with a collection groove (50) which is registerable with a return passage (52) during at least a period of the pumping cycle, the return passage (52) being provided with a venturi device (54) in communication with a low pressure drain (58) such that, in use, leakage fuel within the collection groove (50) is permitted to flow to the low pressure drain through the venturi device (54). <IMAGE>
IPC 1-7
IPC 8 full level
F02M 59/10 (2006.01); F02M 59/44 (2006.01); F02M 59/46 (2006.01); F02M 55/00 (2006.01)
CPC (source: EP)
F02M 59/102 (2013.01); F02M 59/442 (2013.01); F02M 59/462 (2013.01); F02M 55/00 (2013.01)
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)
EP 1363016 A2 20031119; EP 1363016 A3 20050209; GB 0209146 D0 20020529
DOCDB simple family (application)
EP 03252438 A 20030416; GB 0209146 A 20020422