Title:
HYDRAULIC PUMP CONTROL SYSTEM FOR CONSTRUCTION MACHINERY
Document Type and Number:
WIPO Patent Application WO/2012/074145
Kind Code:
A1
Abstract:
Disclosed is a hydraulic pump control system for minimising flow loss by optimally limiting the discharge flow volume of the hydraulic pump when an upper swivel body is made to swivel abruptly. The hydraulic pump control system according to the present invention comprises: a swivel motor which is connected to a hydraulic pump; a control spool for the swivel motor, which controls the hydraulic fluid supplied to the swivel motor during switch back by means of a control signal for a remote control valve; an orifice which is provided on the furthest downstream side of a centre bypass pathway; a regulator which controls the angle of inclination of the swash plate of the hydraulic pump; a swivel operation signal detection means which detects a swivel operation signal output from the remote control valve; an electronic proportional pressure reducing valve which outputs a secondary pressure proportional to the detection signal of the swivel operation signal detection means; and a shuttle valve of which the input sides are respectively coupled to the orifice and the electronic proportional pressure reducing valve, and the output side is coupled to the regulator.
Inventors:
KIM MI-OK (KR)
BANG SANG-HO (KR)
BANG SANG-HO (KR)
Application Number:
PCT/KR2010/008501
Publication Date:
June 07, 2012
Filing Date:
November 30, 2010
Export Citation:
Assignee:
VOLVO CONSTR EQUIP AB (SE)
KIM MI-OK (KR)
BANG SANG-HO (KR)
KIM MI-OK (KR)
BANG SANG-HO (KR)
International Classes:
F15B9/08; E02F9/22; F15B13/02
Foreign References:
| JP2006290561A | 2006-10-26 | |||
| KR20050119762A | 2005-12-22 | |||
| KR20030058378A | 2003-07-07 | |||
| KR20050049767A | 2005-05-27 | |||
| JPH1077661A | 1998-03-24 |
Other References:
See also references of EP 2647850A4
None
None
Attorney, Agent or Firm:
YOON, Eui-Seoup (KR)
윤의섭 (KR)
윤의섭 (KR)
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Claims: