EP 1553308 A1 20050713 - ELECTROHYDRAULIC ACTUATION SYSTEM

Title (en)

ELECTROHYDRAULIC ACTUATION SYSTEM

Title (de)

ELEKTROHYDRAULISCHES BETÄTIGUNGSSYSTEM

Title (fr)

SYSTEME DE VERINS ELECTRO-HYDRAULIQUES

Publication

EP 1553308 A1 20050713 (EN)

Application

EP 03741367 A 20030711

Priority

JP 0308865 W 20030711
JP 2002202792 A 20020711

Abstract (en)

An object of the invention is to provide an electro-hydraulic actuation system which can prevent the generation of a shortage in volume of a fluid supplied to a hydraulic actuator having a larger load pressure of hydraulic actuators of a plurality of electro-hydraulic actuators. The electro-hydraulic actuation system 100 changes a working fluid discharge volume of a variable displacement hydraulic pump 111 by a selector valve 141, a two-position valve 142, a spring 143 and a discharge volume changing hydraulic cylinder 144 based on the maximum pressure of load pressures of a hydraulic motor 122 and a hydraulic motor 132 and a working fluid discharge pressure of the variable displacement hydraulic pump 111. <IMAGE>

IPC 1-7

F15B 11/00

IPC 8 full level

F15B 9/14 (2006.01); F15B 9/16 (2006.01); F15B 11/16 (2006.01); F15B 11/22 (2006.01)

CPC (source: EP)

Citation (search report)

See references of WO 2004007973A1

Designated contracting state (EPC)

DE FR IT

DOCDB simple family (publication)

EP 1553308 A1 20050713; AU 2003280997 A1 20040202; JP WO2004007973 A1 20051110; WO 2004007973 A1 20040122

DOCDB simple family (application)

EP 03741367 A 20030711; AU 2003280997 A 20030711; JP 0308865 W 20030711; JP 2004521200 A 20030711