Title:
POWER CONTROL APPARATUS AND POWER CONTROL METHOD FOR CONSTRUCTION MACHINERY
Document Type and Number:
WIPO Patent Application WO/2011/078578
Kind Code:
A2
Abstract:
According to one aspect of the present invention, a power control apparatus for construction machinery comprises: an engine (10) connected to a hydraulic pump (20) to drive the hydraulic pump (20); and a control unit (60), which calculates an engine load ratio, defined as a ratio of a load torque of the engine (10) to the maximum torque of the engine (10), calculated from an input target engine RPM, and calculates an engine RPM command value in proportion to the engine load ratio, such that the engine (10) can be driven at the target engine RPM, and outputs the calculated command value to the engine (10). According to another aspect of the present invention, a hydraulic pump control apparatus controls the hydraulic pump (20) driven by the engine (10), and comprises: a horsepower control unit (30), which varies the swash plate of the hydraulic pump (20) so as to vary the required horsepower of the hydraulic pump (20); a pressure sensor (50) for sensing a load pressure (Pd) of working oil discharged from the hydraulic pump (20); and a control unit (60), which calculates a target required horsepower of a pump from the load pressure (Pd) sensed by the pressure sensor (50), and controls the horsepower control unit (30) such that the required horsepower of the hydraulic pump (20) gradually becomes closer to the target required horse power of a pump during a preset time (Δt).
Inventors:
SOHN, Won Sun (1 Gangbyeon Hansol Sol Park, 300 Yeomchang-dong, Gangseo-gu, Seoul 157-760, 157-760, KR)
손원선 (서울특별시 강서구 염창동 300번지 강변한솔솔파크 102동 1502호, 157-760 Seoul, 157-760, KR)
PARK, Duck Woo (1115-501, Hanwha EcoMetro 11 BlockNonhyeon-dong, Namdong-gu, Incheon, Incheon 405-793, 405-793, KR)
손원선 (서울특별시 강서구 염창동 300번지 강변한솔솔파크 102동 1502호, 157-760 Seoul, 157-760, KR)
PARK, Duck Woo (1115-501, Hanwha EcoMetro 11 BlockNonhyeon-dong, Namdong-gu, Incheon, Incheon 405-793, 405-793, KR)
Application Number:
KR2010/009207
Publication Date:
June 30, 2011
Filing Date:
December 22, 2010
Export Citation:
Assignee:
DOOSAN INFRACORE CO., LTD. (7-11Hwasu-dong, Dong-gu, Incheon 401-020, 401-020, KR)
두산인프라코어 주식회사 (인천광역시 동구 화수동 7-11번지, 401-020 Incheon, 401-020, KR)
SOHN, Won Sun (1 Gangbyeon Hansol Sol Park, 300 Yeomchang-dong, Gangseo-gu, Seoul 157-760, 157-760, KR)
손원선 (서울특별시 강서구 염창동 300번지 강변한솔솔파크 102동 1502호, 157-760 Seoul, 157-760, KR)
두산인프라코어 주식회사 (인천광역시 동구 화수동 7-11번지, 401-020 Incheon, 401-020, KR)
SOHN, Won Sun (1 Gangbyeon Hansol Sol Park, 300 Yeomchang-dong, Gangseo-gu, Seoul 157-760, 157-760, KR)
손원선 (서울특별시 강서구 염창동 300번지 강변한솔솔파크 102동 1502호, 157-760 Seoul, 157-760, KR)
International Classes:
E02F9/22; F02D29/04; F15B11/028
Attorney, Agent or Firm:
KIM, Kee Hyo et al. (14F, Kukdong Building 60-1,Chungmuro3-ka, Chung-ku, Seoul 100-705, 100-705, KR)
Download PDF: