Title:
HYDRAULIC ACTUATOR DAMPING CONTROL SYSTEM FOR CONSTRUCTION MACHINERY
Document Type and Number:
WIPO Patent Application WO/2013/008964
Kind Code:
A1
Abstract:
Disclosed is an actuator damping control system for reducing shocks imparted to a hydraulic actuator caused by a change in load resulting from an abrupt manipulation of a boom or other working device. The hydraulic actuator damping control system for construction machinery according to one embodiment of the present invention comprises: first and second supply passages both supplying a hydraulic flow from a hydraulic pump to an inlet side of an actuator; first and second discharge passages, both of which return the hydraulic flow from the actuator to a hydraulic tank; a first meter "in" control valve and a first meter "out" control valve for controlling the hydraulic flow supplied from the hydraulic pump to the actuator inlet side and the hydraulic flow returned from the actuator outlet side to the hydraulic tank, respectively, in order to control the actuator in one direction; a second meter "in" control valve and a second meter "out" control valve for controlling the hydraulic flow supplied from the hydraulic pump to the actuator inlet side and the hydraulic flow returned from the actuator outlet side to the hydraulic tank, respectively, in order to control the actuator in another direction; and a controller for outputting control signals for opening either the first or second meter "in" control valve according to the degree to which a joystick is manipulated and the load on the actuator, and for opening either the first or second meter "out" control valve when the load on the actuator exceeds a reference value.
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Inventors:
LEE CHUN-HAN (KR)
Application Number:
PCT/KR2011/005087
Publication Date:
January 17, 2013
Filing Date:
July 12, 2011
Export Citation:
Assignee:
VOLVO CONSTR EQUIP AB (SE)
LEE CHUN-HAN (KR)
LEE CHUN-HAN (KR)
International Classes:
F15B13/02; E02F9/22; F15B20/00
Foreign References:
| JP2005265002A | 2005-09-29 | |||
| JP2007064446A | 2007-03-15 | |||
| JP2010286074A | 2010-12-24 | |||
| JP2005140153A | 2005-06-02 |
Other References:
See also references of EP 2733362A4
Attorney, Agent or Firm:
YOON, Eui-Seoup (KR)
윤의섭 (KR)
윤의섭 (KR)
Download PDF:
Claims:
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