EP 0451274 A4 19911113 - HYDRAULIC CONTROLLER
Title (en)
HYDRAULIC CONTROLLER
Publication
Application
Priority
JP 16778988 U 19881227
Abstract (en)
[origin: EP0451274A1] This invention relates to a hydraulic controller having a construction wherein individual operation valves (12, 13) for controlling the oil feed quantity to hydraulic actuators (15, 16) are disposed between a hydraulic pump (10) and the hydraulic actuators (15, 16). In this hydraulic controller, a flow rate regulating solenoid valve (11) is connected to the hydraulic pump (10) in parallel and individual operation opening characteristics which are applied to the single operation of each operation valve (12, 13) and composite operation opening characteristics which are applied to the combinated operation of the operation valves (12, 13) are set in advance as the opening characteristics of the solenoid valve (11). When either one of the operation valves (12, 13) is operated individually, the opening of the solenoid valve (11) is controlled on the basis of a single operation opening characteristics which are to be applied to that operation valve, and when the operation valves (12, 13) are operated in combination, the opening of the solenoid valve (11) is controlled on the basis of a composite operation opening characteristics. Accordingly, single control and combined control of the individual hydraulic actuators (15, 16) can be made smoothly by setting single operation opening characteristics and composite operation opening characteristics matching the load of the individual hydraulic actuators.
IPC 1-7
IPC 8 full level
E02F 9/22 (2006.01); F15B 11/04 (2006.01); F15B 11/042 (2006.01); F15B 11/16 (2006.01)
CPC (source: EP KR)
F15B 11/0423 (2013.01 - EP); F15B 11/16 (2013.01 - KR); F15B 2211/30525 (2013.01 - EP); F15B 2211/3111 (2013.01 - EP); F15B 2211/3116 (2013.01 - EP); F15B 2211/324 (2013.01 - EP); F15B 2211/40515 (2013.01 - EP); F15B 2211/41509 (2013.01 - EP); F15B 2211/426 (2013.01 - EP); F15B 2211/45 (2013.01 - EP); F15B 2211/455 (2013.01 - EP); F15B 2211/634 (2013.01 - EP); F15B 2211/6654 (2013.01 - EP); F15B 2211/7052 (2013.01 - EP); F15B 2211/7053 (2013.01 - EP); F15B 2211/71 (2013.01 - EP); F15B 2211/75 (2013.01 - EP)
Citation (search report)
- [A] EP 0235545 A2 19870909 - HITACHI CONSTRUCTION MACHINERY [JP]
- [A] EP 0015296 A1 19800917 - UNIC CORP [JP]
- [A] DE 2630468 A1 19780112 - BOSCH GMBH ROBERT
- [A] DE 1807173 A1 19700618 - BOSCH GMBH ROBERT
- See references of WO 9007651A1
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0451274 A1 19911016; EP 0451274 A4 19911113; JP H0288005 U 19900712; KR 910700415 A 19910315; WO 9007651 A1 19900712
DOCDB simple family (application)
EP 90901035 A 19891227; JP 16778988 U 19881227; JP 8901309 W 19891227; KR 900701732 A 19900809