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Patent Searching and Data


Title:
FLOW CONTROL SYSTEM FOR A HYDRAULIC PUMP OF CONSTRUCTION MACHINERY
Document Type and Number:
WIPO Patent Application WO/2012/002586
Kind Code:
A1
Abstract:
Disclosed is a flow control system for a hydraulic pump of construction machinery, which is capable of variably controlling the discharge flow from a hydraulic pump in accordance with load pressure that occurs at a hydraulic actuator of a boom cylinder or the like. In a flow control system for a hydraulic pump according to the present invention, after the discharge pressure of the hydraulic pump and the respective degrees of control of control levers for the respective hydraulic actuators are detected, and the average load pressures are set for each hydraulic actuator, controlling is performed to reduce the flow rate such that the discharge flow from the hydraulic pump becomes equal to the amount of load at the hydraulic actuators in the event the discharge pressure at the hydraulic pump is greater than the average load pressure at the respective hydraulic actuators, and controlling is performed such that the discharge flow at the hydraulic pump is proportional to the degrees of control in the event the discharge pressure at the hydraulic pump is less than the average load pressure at the respective hydraulic actuators.

Inventors:
JOUNG, Hea-Gyoon (1 SinJurye LG Apt, Jurye 2-dong Sasang-gu, Busan 617-762, 617-762, KR)
정해균 (부산시 사상구 주례2동 LG신주례아파트, 617-762 Busan, 617-762, KR)
LEE, Sang-Hee (321 Dormitory of Volvo, 33-1 Sinchon-dongChangwon-si, Gyeongsangnam-do 641-370, 641-370, KR)
Application Number:
KR2010/004176
Publication Date:
January 05, 2012
Filing Date:
June 28, 2010
Export Citation:
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Assignee:
VOLVO CONSTRUCTION EQUIPMENT AB (SE Eskilstuna, SE 631 85, SE)
볼보 컨스트럭션 이큅먼트 에이비 (스웨덴 에스킬스투나, SE Eskilstuna, SE 631 85, SE)
JOUNG, Hea-Gyoon (1 SinJurye LG Apt, Jurye 2-dong Sasang-gu, Busan 617-762, 617-762, KR)
정해균 (부산시 사상구 주례2동 LG신주례아파트, 617-762 Busan, 617-762, KR)
International Classes:
F15B9/04; E02F9/22; F15B9/08; F15B13/043
Foreign References:
KR100651695B12006-11-30
KR930009513B11993-10-06
KR20020006607A2002-01-23
JP2002326799A2002-11-12
JP2006112280A2006-04-27
Attorney, Agent or Firm:
YOON, Eui-Seoup (17th Floor, UNIK Bldg.706-13, Yeoksam-dong, Gangnam-gu, Seoul 135-080, 135-080, KR)
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Claims: