Hydraulic pressure control apparatus for construction machine
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
E02F-009/22
E02F-003/43
E02F-009/20
F15B-021/08
출원번호
US-0518623
(2010-12-22)
등록번호
US-9016052
(2015-04-28)
우선권정보
KR-10-2009-0131304 (2009-12-24)
국제출원번호
PCT/KR2010/009209
(2010-12-22)
§371/§102 date
20120828
(20120828)
국제공개번호
WO2011/078580
(2011-06-30)
발명자
/ 주소
Cho, Yong Lak
출원인 / 주소
Doosan Infracore Co., Ltd.
대리인 / 주소
Veldhuis-Kroeze, John D.
인용정보
피인용 횟수 :
1인용 특허 :
4
초록▼
According to the present disclosure, a hydraulic control apparatus for construction machinery comprises: hydraulic pumps; first and second control valve units which control the flow directions of working oil discharged from the hydraulic pumps to supply the working oil to first and second work machi
According to the present disclosure, a hydraulic control apparatus for construction machinery comprises: hydraulic pumps; first and second control valve units which control the flow directions of working oil discharged from the hydraulic pumps to supply the working oil to first and second work machines, respectively, and which control the degree of opening of flow channels which interconnect the first and second work machines and the hydraulic pumps, respectively; and a control unit which controls the first and second control valve units in accordance with operating signals inputted from first and second operating units. The control unit determines whether the current work mode is a general work mode or a preferential work mode, and if the mode is determined to be a general work mode, calculates a first degree of opening of a normal channel in accordance with the operating signal inputted from the first operating unit and outputs the calculated first degree of opening of a normal channel to the first control valve unit, and if the mode is determined to be a preferential work mode, calculates a second degree of opening of a normal channel in accordance with the operating signal input from the second operating unit, outputs the calculated second degree of opening of a normal channel to the second control valve unit, and outputs a control signal to the second control valve unit such that the degree of opening of the second control valve unit is smaller than the first degree of opening of a normal channel, so as to preferentially ensure the flow of the working oil being supplied to the first work machine.
대표청구항▼
1. A hydraulic pressure control apparatus of a construction machine, comprising: a hydraulic pump;first and second control valve units configured to control a flow direction of a working fluid discharged from the hydraulic pump to supply the working fluid to first and second working tools, respectiv
1. A hydraulic pressure control apparatus of a construction machine, comprising: a hydraulic pump;first and second control valve units configured to control a flow direction of a working fluid discharged from the hydraulic pump to supply the working fluid to first and second working tools, respectively, and to control opening degrees of passages connecting the first and second working tools and the hydraulic pump, respectively; anda control unit configured to control the first and second control valve units in response to manipulation signals input from first and second manipulating parts, respectively,wherein the control unit determines whether a current working mode is a general working mode or a prior working mode, when it is determined that the current working mode is a general working mode, calculates a first normal passage opening degree in response to a manipulation signal input from the first manipulating part to output the first normal passage opening degree to the first control valve unit, and calculates a second normal passage opening degree in response to a manipulation signal input from the second manipulating part to output the second normal passage opening degree to the second control valve unit, and when it is determined that the current working mode is a prior working mode, outputs a control signal to the second control valve unit so that an opening degree of the second control valve unit becomes smaller than the first normal passage opening degree such that an amount of the working fluid supplied to the first working tool is secured first. 2. The hydraulic pressure control apparatus of claim 1, wherein: in the prior working mode, the control unit controls the second control valve unit such that an opening degree of the second control valve unit becomes smaller as an opening degree of the first control valve unit becomes larger. 3. The hydraulic pressure control apparatus of claim 2, wherein when a plurality of working units are manipulated by an operator to be complexly driven, the control unit regards a working tool whose manipulation degree by the operator is relatively large as the first working tool and regards the remaining working tools as the second working tool. 4. The hydraulic pressure control apparatus of claim 1, wherein when a plurality of working units are manipulated by an operator to be complexly driven, the control unit regards a working tool whose manipulation degree by the operator is relatively large as the first working tool and regards the remaining working tools as the second working tool. 5. The hydraulic pressure control apparatus of claim 1, wherein the hydraulic pump includes first and second pumps, the first and second working tools are a boom cylinder and an arm cylinder the first control valve unit includes: a first boom speed control valve configured to control a flow direction of the working fluid discharged from the first pump to supply the working fluid to the boom cylinder; and a second boom speed control valve configured to control a flow direction of the working fluid discharged from the second pump to supply the working fluid to the boom cylinder together with the working fluid of the first pump, the second control valve unit includes: a first arm speed control valve configured to control a flow direction of the working fluid discharged from the second pump to supply the working fluid to the arm cylinder; and a second arm speed control valve configured to control a flow direction of the working fluid discharged from the first pump to supply the working fluid to the arm cylinder together with the second pump, and when the prior working mode is a boom first working mode, the control unit controls the second arm speed control valve so that a passage opening degree of the second arm speed control valve becomes smaller than a normal passage opening degree. 6. A hydraulic pressure control apparatus of a construction machine, comprising: first and second pumps;a first boom speed control valve configured to control a flow direction of the working fluid discharged from the first pump to supply the working fluid to the boom cylinder and to regulate an opening degree of a passage;a second boom speed control valve configured to control a flow direction of the working fluid discharged from the second pump to supply the working fluid to the boom cylinder together with the first pump and to regulate an opening degree of a passage;a first arm speed control valve configured to control a flow direction of the working fluid discharged from the second pump to supply the working fluid to the arm cylinder and to regulate an opening degree of a passage;a second arm speed control valve configured to control a flow direction of the working fluid discharged from the first pump to supply the working fluid to the arm cylinder together with the second pump and to regulate an opening degree of a passage; anda control unit configured to control conversion directions and opening degrees of the first and second boom control valves and the first and second arm speed control valves in response to signals input from first and second manipulating parts respectively, andwherein the control unit determines which of a general working mode and a flattening working mode a current working mode is, when it is determined that the current working mode is a general working mode, calculates first and second normal passage opening degrees in response to manipulation signals input from the first and second manipulating parts, respectively to output the calculated first and second normal passage opening degrees to the second boom speed control valve and the second arm speed control valve, and when it is determined that the current working mode is a flattening working mode, outputs a control signal to the second boom speed control valve and the second arm speed control valve so that opening degrees of the second boom speed control valve and the second arm speed control valve become smaller than first and second normal passage opening degrees. 7. The hydraulic pressure control apparatus of claim 6, wherein when the current working mode is a flattening working mode, the control unit outputs a control signal to the second boom speed control valve and the second arm speed control valve so that an opening degree of the second boom speed control valve becomes smaller as an opening degree of the first arm speed control valve becomes larger and an opening degree of the second arm speed control valve becomes smaller as an opening degree of the first boom speed control valve becomes larger.
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