EP 4204631 A1 20230705 - METHOD AND SYSTEM FOR RELEASING THE RESIDUAL PRESSURE OF A HYDRAULIC CIRCUIT OF A WORK MACHINE AND WORK MACHINE INCLUDING THE SYSTEM
Title (en)
METHOD AND SYSTEM FOR RELEASING THE RESIDUAL PRESSURE OF A HYDRAULIC CIRCUIT OF A WORK MACHINE AND WORK MACHINE INCLUDING THE SYSTEM
Title (de)
VERFAHREN UND SYSTEM ZUR FREIGABE DES RESTDRUCKS EINES HYDRAULIKKREISLAUFS EINER ARBEITSMASCHINE UND ARBEITSMASCHINE MIT DEM SYSTEM
Title (fr)
PROCÉDÉ ET SYSTÈME DE LIBÉRATION DE LA PRESSION RÉSIDUELLE D'UN CIRCUIT HYDRAULIQUE D'UN ENGIN DE CHANTIER ET ENGIN DE CHANTIER COMPRENANT LE SYSTÈME
Publication
Application
Priority
- IT 202000017416 A 20200717
- EP 2021069684 W 20210715
Abstract (en)
[origin: WO2022013327A1] Method and system for releasing the residual pressure of a hydraulic circuit of a work machine and work machine including the system Method for releasing the residual pressure of a hydraulic circuit of a work machine, the hydraulic circuit comprising a source (P) of pressurized hydraulic liquid and a discharge tank (T) of the pressurized hydraulic liquid and at least a double-action hydraulic actuator (Al, A2,...) controlled by means of a corresponding actuation hydraulic valve (VI, V2, V3,...), wherein the actuation hydraulic valve has a stand position in which it directs pressurized hydraulic liquid from the source to the discharge tank and, at the same time, compartments opposite chambers (CII, C12; C21, C22; of the corresponding actuator (Al, A2,..) and two opposite actuation positions in which the valve connects the first chamber (CII, C21) with the source and a corresponding second chamber (C12, C22) with the discharge tank, and vice versa, the method comprising a first preliminary step of checking or forcing a deactivation of the source (P) and a subsequent second step of activating alternately the two opposite actuation positions.
IPC 8 full level
E02F 9/22 (2006.01); E02F 3/43 (2006.01); E02F 9/20 (2006.01); F15B 20/00 (2006.01)
CPC (source: EP)
E02F 3/431 (2013.01); E02F 9/2095 (2013.01); E02F 9/226 (2013.01); E02F 9/2267 (2013.01); E02F 9/2282 (2013.01); F15B 20/00 (2013.01); F15B 21/005 (2013.01); F15B 2211/3059 (2013.01); F15B 2211/31588 (2013.01); F15B 2211/7135 (2013.01); F15B 2211/85 (2013.01)
Citation (search report)
See references of WO 2022013327A1
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
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
DOCDB simple family (application)
EP 2021069684 W 20210715; EP 21742424 A 20210715