EP 2937474 A2 20151028 - HYDRAULIC SYSTEM FOR CONSTRUCTION MACHINERY
Title (en)
HYDRAULIC SYSTEM FOR CONSTRUCTION MACHINERY
Title (de)
HYDRAULISCHES SYSTEM FÜR EINE BAUMASCHINE
Title (fr)
SYSTÈME HYDRAULIQUE POUR ÉQUIPEMENT DE CONSTRUCTION
Publication
Application
Priority
KR 20140047451 A 20140421
Abstract (en)
The present disclosure relates to a hydraulic system for construction machinery. According to the hydraulic system for construction machinery according to the exemplary embodiment of the present disclosure, during a traveling mode, hydraulic oil discharged from a first main pump (11) merges with hydraulic oil discharged from a second main pump (12), and the merged hydraulic oil is provided to a traveling motor (80), thereby improving traveling performance. In addition, according to the hydraulic system for construction machinery according to the exemplary embodiment of the present disclosure, even in a situation in which the first and third control valve units (51, 53) cannot be normally controlled for an unknown reason, the overspeed traveling may be prevented by restricting a maximum discharge flow rate of the first main pump (11) in the traveling mode, thereby ensuring traveling performance and preventing durability of a traveling system from deteriorating.
IPC 8 full level
E02F 9/22 (2006.01)
CPC (source: CN EP)
E02F 9/2239 (2013.01 - EP); E02F 9/2253 (2013.01 - EP); E02F 9/226 (2013.01 - EP); E02F 9/2285 (2013.01 - EP); E02F 9/2292 (2013.01 - EP); F15B 11/04 (2013.01 - CN)
Citation (applicant)
JP 2004027706 A 20040129 - HITACHI CONSTRUCTION MACHINERY
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
DOCDB simple family (publication)
EP 2937474 A2 20151028; EP 2937474 A3 20160413; EP 2937474 B1 20220420; CN 105003475 A 20151028; CN 105003475 B 20161207; KR 102156447 B1 20200915; KR 20150121506 A 20151029
DOCDB simple family (application)
EP 15164484 A 20150421; CN 201510190974 A 20150421; KR 20140047451 A 20140421