EP 3087275 B1 20220803 - VARIABLE DISPLACEMENT PUMP FOR FLUIDS WITH MODULATED REGULATION, AND METHOD FOR REGULATING ITS DISPLACEMENT
Title (en)
VARIABLE DISPLACEMENT PUMP FOR FLUIDS WITH MODULATED REGULATION, AND METHOD FOR REGULATING ITS DISPLACEMENT
Title (de)
VERSTELLPUMPE FÜR FLÜSSIGKEITEN MIT MODULIERTER REGULIERUNG UND VERFAHREN ZUR REGELUNG DER VERDRÄNGUNG
Title (fr)
POMPE À DÉPLACEMENT VARIABLE POUR FLUIDES À RÉGULATION MODULÉE, ET PROCÉDÉ DE RÉGULATION DE SON DÉPLACEMENT
Publication
Application
Priority
- IT TO20131063 A 20131223
- IT TO20131072 A 20131224
- IB 2014067211 W 20141222
Abstract (en)
[origin: WO2015097637A1] A variable displacement pump (1) comprises a regulation ring (11) having at least a pair of actuation stages (19, 20), of which a first stage is permanently exposed to pressure conditions of the pumped fluid and is arranged to make the regulation ring (11) move against the action of a spring (23), and a second stage is arranged to act concordantly with the spring (23) in a manner controlled by an electrically-controlled valve (50). A spool valve (40), controlled by the electrically-controlled valve (50) and the pressure conditions of the pumped fluid, is connected between the second stage (20) and the electrically- controlled valve (50) and is arranged to modulate a regulation pressure acting on the second stage (20) depending on a control signal supplied by the electrically-controlled valve (50) and on such pressure conditions. A method for regulating the displacement of such a pump is also provided.
IPC 8 full level
F04C 15/00 (2006.01); F04C 2/344 (2006.01); F04C 14/22 (2006.01)
CPC (source: EP)
F04C 2/3441 (2013.01); F04C 14/226 (2013.01)
Citation (examination)
WO 2013140304 A1 20130926 - VHIT SPA [IT]
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)
WO 2015097637 A1 20150702; EP 3087275 A1 20161102; EP 3087275 B1 20220803; EP 3087276 A1 20161102; EP 3087276 B1 20200311; WO 2015097639 A1 20150702
DOCDB simple family (application)
IB 2014067211 W 20141222; EP 14830721 A 20141222; EP 14830722 A 20141222; IB 2014067217 W 20141222