Title:
PUMP CONTROL SYSTEM FOR CONSTRUCTION MACHINERY
Document Type and Number:
WIPO Patent Application WO/2011/078588
Kind Code:
A2
Abstract:
Disclosed is a pump control system for construction machinery. The construction machinery includes a plurality of actuators driven by hydraulic pressure, for example an excavator, wherein a portion of the actuators belong to a one-to-one pump system (A) in which hydraulic pumps are connected to the respective actuators such that fluids can be supplied to the actuators from the respective pumps; and the rest of the actuators belong to an auxiliary control valve system (B) to which fluids can be distributed by an auxiliary control valve (120) connected to one or more pumps. If the amount of fluids in the actuator connected to the auxiliary control valve (120) is insufficient, the actuator connected to the auxiliary control valve (120) is connected to the pump of the one-to-one pump system (A), so that the pump of the one-to-one pump system (A) can be shared. Thus, a deficiency in the amount of fluids in the actuator connected to the auxiliary control valve (120) can be supplemented by the pump of the one-to-one pump system (A), thereby enabling the actuator connected to the auxiliary control valve (120) to operate smoothly.
Inventors:
JANG, Dal Sik (109-402, Mullae Xi Apt.54 Mullaedong 3-ga, Yeongdeungpo-gu, Seoul 150-993, 150-993, KR)
Application Number:
KR2010/009238
Publication Date:
June 30, 2011
Filing Date:
December 23, 2010
Export Citation:
Assignee:
DOOSAN INFRACORE CO., LTD. (7-11, Hwasu-dong Dong-gu, Incheon 401-020, 401-020, KR)
두산인프라코어 주식회사 (인천광역시 동구 화수동 7-11번지, 401-020 Incheon, 401-020, KR)
두산인프라코어 주식회사 (인천광역시 동구 화수동 7-11번지, 401-020 Incheon, 401-020, KR)
International Classes:
E02F9/22; F15B11/05; F15B13/06
Attorney, Agent or Firm:
KIM, Kee Hyo et al. (14F, Kukdong Building 60-1,Chungmuro3-ka, Chung-ku, Seoul 100-705, 100-705, KR)
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