EP 2495431 B1 20140115 - Hydraulic pump, in particular a fuel pump
Title (en)
Hydraulic pump, in particular a fuel pump
Title (de)
Hydraulikpumpe, insbesondere eine Kraftstoffpumpe
Title (fr)
Pompe hydraulique en particulier pompe à carburant
Publication
Application
Priority
EP 11157051 A 20110304
Abstract (en)
[origin: EP2495431A1] A hydraulic pump (HP; 1), in particular a fuel pump, comprising: - an intake port (IP; 2), - a delivery port (DP; 4), provided for hydraulic connection to a user (CR), - at least one cylinder (CY; 20, 22, 24), movable within which is a corresponding piston (P; P1, P2, P3), wherein the piston has, during the operation of the pump (HP, 1), a reciprocating motion between a top dead centre (TDC) and a bottom dead centre (BDC), - a delivery valve (DV; 26, 28, 30) for each cylinder (CY; 20, 22, 24) hydraulically connected thereto, movable between a closed position and an open position, wherein in the open position the delivery valve (DV; 26, 28, 30) is arranged for enabling a flow of fluid between the cylinder (CY; 20, 22, 24) and the delivery port (DP; 4), and wherein in the closed position the delivery valve (DV; 26, 28, 30) is arranged for blocking a flow of fluid between the cylinder (CY; 20, 22, 24) and the delivery port (DP; 4). The hydraulic pump (HP; 1) comprises a regulation assembly (R; 39, 40, 42, 43, 44, 46) which, when a threshold pressure (p REF ) in a user (U; CR) hydraulically connected to said delivery port (DP; 4) is exceeded, is arranged for keeping the delivery valve (DV, 26, 28, 30) in the open position during at least part of a movement of the piston from the top dead centre (TDC) to the bottom dead centre (BDC) and enabling a reflux of fluid from the delivery port (4, DP) to the cylinder (20, 22, 24).
IPC 8 full level
F02M 59/36 (2006.01); F02M 59/46 (2006.01); F02M 63/00 (2006.01); F04B 49/22 (2006.01); F04B 49/24 (2006.01)
CPC (source: EP KR)
F02M 55/00 (2013.01 - KR); F02M 59/10 (2013.01 - KR); F02M 59/365 (2013.01 - EP); F02M 59/44 (2013.01 - KR); F02M 59/46 (2013.01 - KR); F02M 59/462 (2013.01 - EP); F02M 63/0029 (2013.01 - EP); F04B 49/08 (2013.01 - EP); F04B 49/22 (2013.01 - EP); F04B 49/246 (2013.01 - EP); F04B 2201/06012 (2013.01 - EP); F04B 2205/05 (2013.01 - EP); F04B 2205/06 (2013.01 - EP)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 2495431 A1 20120905; EP 2495431 B1 20140115; CN 102654091 A 20120905; CN 102654091 B 20160706; DK 2495431 T3 20140203; JP 2012184761 A 20120927; JP 5866225 B2 20160217; KR 101540502 B1 20150729; KR 20120100804 A 20120912
DOCDB simple family (application)
EP 11157051 A 20110304; CN 201210052526 A 20120302; DK 11157051 T 20110304; JP 2012035345 A 20120221; KR 20120021829 A 20120302