KR100520475B1 - 건설기계의 유압회로 - Google Patents
건설기계의 유압회로 Download PDFInfo
- Publication number
- KR100520475B1 KR100520475B1 KR10-2002-7013920A KR20027013920A KR100520475B1 KR 100520475 B1 KR100520475 B1 KR 100520475B1 KR 20027013920 A KR20027013920 A KR 20027013920A KR 100520475 B1 KR100520475 B1 KR 100520475B1
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- Prior art keywords
- hydraulic pump
- hydraulic
- pressure
- pump
- capacity control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2221—Control of flow rate; Load sensing arrangements
- E02F9/2232—Control of flow rate; Load sensing arrangements using one or more variable displacement pumps
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2221—Control of flow rate; Load sensing arrangements
- E02F9/2232—Control of flow rate; Load sensing arrangements using one or more variable displacement pumps
- E02F9/2235—Control of flow rate; Load sensing arrangements using one or more variable displacement pumps including an electronic controller
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2278—Hydraulic circuits
- E02F9/2292—Systems with two or more pumps
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2278—Hydraulic circuits
- E02F9/2296—Systems with a variable displacement pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B23/00—Pumping installations or systems
- F04B23/04—Combinations of two or more pumps
- F04B23/06—Combinations of two or more pumps the pumps being all of reciprocating positive-displacement type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/08—Regulating by delivery pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/161—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load
- F15B11/165—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load for adjusting the pump output or bypass in response to demand
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/2053—Type of pump
- F15B2211/20546—Type of pump variable capacity
- F15B2211/20553—Type of pump variable capacity with pilot circuit, e.g. for controlling a swash plate
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/20576—Systems with pumps with multiple pumps
- F15B2211/20584—Combinations of pumps with high and low capacity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/305—Directional control characterised by the type of valves
- F15B2211/3052—Shuttle valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/305—Directional control characterised by the type of valves
- F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/305—Directional control characterised by the type of valves
- F15B2211/3056—Assemblies of multiple valves
- F15B2211/3059—Assemblies of multiple valves having multiple valves for multiple output members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/31—Directional control characterised by the positions of the valve element
- F15B2211/3105—Neutral or centre positions
- F15B2211/3116—Neutral or centre positions the pump port being open in the centre position, e.g. so-called open centre
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
- F15B2211/3157—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line
- F15B2211/31576—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line having a single pressure source and a single output member
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/605—Load sensing circuits
- F15B2211/6051—Load sensing circuits having valve means between output member and the load sensing circuit
- F15B2211/6054—Load sensing circuits having valve means between output member and the load sensing circuit using shuttle valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/605—Load sensing circuits
- F15B2211/6051—Load sensing circuits having valve means between output member and the load sensing circuit
- F15B2211/6055—Load sensing circuits having valve means between output member and the load sensing circuit using pressure relief valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/63—Electronic controllers
- F15B2211/6303—Electronic controllers using input signals
- F15B2211/6306—Electronic controllers using input signals representing a pressure
- F15B2211/6309—Electronic controllers using input signals representing a pressure the pressure being a pressure source supply pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/63—Electronic controllers
- F15B2211/6303—Electronic controllers using input signals
- F15B2211/6343—Electronic controllers using input signals representing a temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/665—Methods of control using electronic components
- F15B2211/6656—Closed loop control, i.e. control using feedback
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
- F15B2211/7051—Linear output members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
- F15B2211/7058—Rotary output members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
- F15B2211/7135—Combinations of output members of different types, e.g. single-acting cylinders with rotary motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/78—Control of multiple output members
- F15B2211/781—Control of multiple output members one or more output members having priority
Abstract
Description
Claims (14)
- 엔진과,상기 엔진에 의해서 구동되는 가변용량형의 제l 유압 펌프와,가변용량형의 제2 유압 펌프와, 제3 유압 펌프와,상기 제1 유압 펌프 및 제2 유압 펌프의 밀어내기 용적을 제어하는 용량제어수단과,상기 제1, 제2, 제3 유압 펌프로부터의 압유에 의해서 구동하는 복수의 액츄에이터와,상기 액츄에이터에 공급되는 압유의 흐름을 제어하는 복수의 방향제어밸브를 가지는 유압회로에서,상기 제3 유압 펌프가 가변용량형의 유압 펌프이며, 상기 제3 유압 펌프의 밀어내기 용적을 제어하는 제3 유압 펌프용 용량제어수단과,상기 제1, 제2, 제3 유압 펌프의 각각의 상태량인 해당되는 유압 펌프 토출압을 검출하는 제1, 제2, 제3 상태량 검출수단을 구비하고,상기 제l 및 제2 유압 펌프용 용량제어수단이, 상기 제1, 제2, 제3 상태량 검출수단에 의해서 검출된 토출압에 기초하여 제1 및 제2 유압 펌프의 밀어내기 용적을 제어하며,상기 제3 유압 펌프용 용량제어수단이, 상기 제1, 제2, 제3 상태량 검출수단 중 상기 제3 상태량 검출수단에 의해서 검출된 토출압에 기초하여 제3 유압 펌프의 밀어내기 용적을 제어하는 것으로,상기 제1 상태량 검출수단이 상기 제1 유압 펌프의 토출압을 상기 제1 및 제2 유압 펌프용 용량제어수단으로 유도하는 제1 유도관로로 이루어지고,상기 제2 상태량 검출수단이 상기 제2 유압 펌프의 토출압을 상기 제1 및 제2 유압 펌프용 용량제어수단으로 유도하는 제2 유도관로로 이루어지고,상기 제3 상태량 검출수단이 상기 제3 유압 펌프의 토출압을 상기 제1 및 제2 유압 펌프용 용량제어수단으로 유도하는 제3 유도관로와, 상기 제3 유압 펌프의 토출압을 상기 제3 유압 펌프용 용량제어수단으로 유도하는 제4 유도관로로 이루어지고,상기 제1, 제2 유압 펌프용 용량제어수단, 및 상기 제3 유압 펌프용 용량제어수단은, 상기 제1, 제2, 제3, 제4 유도관로에서 검출된 각 유압 펌프의 토출압에 기초하고, 상기 엔진의 출력 마력을 넘지 않도록 상기 제1, 제2, 제3 유압 펌프의 입력 토크를 제어하는 것을 특징으로 하는 유압회로.
- 제1항에 있어서,상기 제3 유도관로 상에 상기 제3 유압 펌프의 토출압 신호에 소정의 제한을 부여하는 제한수단을 설치한 것을 특징으로 하는 유압회로.
- 제2항에 있어서,상기 제한수단이 소정의 설정압 이하로 제한하는 감압밸브인 것을 특징으로 하는 유압회로.
- 제1항에 있어서,파일럿 유압 펌프와,상기 제1 및 제2 유압 펌프용 용량제어수단을 연결하는 관로 상에 설치되어 상기 파일럿 유압 펌프로부터의 토출압을 제어하는 제1 전자비례밸브와,상기 파일럿 유압 펌프와 상기 제3 유압 펌프용 용량제어수단을 연결하는 관로상에 설치되고, 상기 파일럿 유압 펌프로부터의 토출압을 제어하는 제2 전자비례밸브와,상기 제1, 제2, 제3 상태량 검출수단으로부터의 신호가 입력되고, 상기 제1 및 제2 전자비례밸브로의 각각의 구동신호를 연산 출력하는 콘트롤러를 추가로 구비하고,상기 제1 및 제2 유압 펌프용 용량제어수단이 상기 제1 전자비례밸브에 의해, 상기 제3 유압 펌프용 용량제어수단이 상기 제2 전자비례밸브에 의해 감압된 파일럿압에 의해서 각각 작동하는 것을 특징으로 하는 유압회로.
- 제4항에 있어서,상기 콘트롤러는, 상기 제1 전자비례밸브로의 구동신호의 연산시, 상기 제3 상태량 검출수단으로부터의 검출 신호가 소정치 이상인 경우, 상기 액츄에이터의 부하에 따라 변화될 수 있는 제3 유압 펌프의 펌프 입력 토크와 상기 제3 유압 펌프에 미리 설정되어 있는 펌프 입력 토크의 최대치와의 차이 값을 제3 유압 펌프의 펌프 입력 토크의 증가치로 산출하고, 상기 제l, 제2 상태량 검출수단으로부터의 검출 신호에 기초하여 산출한 제l 및 제2 유압 펌프의 펌프 입력 토크에서 상기 산출된 제3 유압 펌프의 펌프 입력 토크의 증가치를 빼고, 그 결과에 기초하여 상기 제1 전자비례밸브로 구동신호를 출력하는 것을 특징으로 하는 유압회로.
- 제1항 내지 제5항 중 어느 한 항에 따른 유압회로를 구비하고 있는 것을 특징으로 하는 건설기계.
- 제6항에 있어서,상기 콘트롤러에 지시를 주기 위한 지시수단을 추가로 구비하고, 상기 콘트롤러가 상기 지시수단으로부터의 지시신호에 기초하여 상기 제1, 제2 전자비례밸브로의 구동신호를 연산 출력하는 것을 특징으로 하는 건설기계.
- 제7항에 있어서,상기 지시신호가 상기 건설기계에 설치되는 운전실의 실내용 공기조절기의 구동지시신호인 것을 특징으로 하는 건설기계.
- 제6항에 있어서,상기 건설기계의 가동에 관련되는 상태량을 검출하는 제4 상태량 검출수단을 추가로 설치하고, 상기 콘트롤러가 상기 제4 상태량 검출수단으로부터의 신호에 기초하여 상기 제1 및 제2 전자비례밸브로의 구동신호를 연산 출력하는 것을 특징으로 하는 건설기계.
- 제9항에 있어서,상기 건설기계가 붐(boom), 암(arm), 어태치먼트(attachment)로 이루어지는 프런트부재를 구비한 유압 셔블이며, 상기 제4 상태량 검출수단이 상기 프런트부재의 자세를 검출하는 자세검출수단인 것을 특징으로 하는 건설기계.
- 제9항에 있어서,상기 제4 상태량 검출수단이 상기 엔진의 냉각수온을 검출하는 냉각수온검출기인 것을 특징으로 하는 건설기계.
- 삭제
- 제6항에 있어서,상기 건설기계가 선회가능한 유압 셔블이며, 상기 제3 유압 펌프는 최소한 선회용 액츄에이터에 압유를 공급하는 것을 특징으로 하는 건설기계.
- 삭제
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JP2001042082A JP3865590B2 (ja) | 2001-02-19 | 2001-02-19 | 建設機械の油圧回路 |
JPJP-P-2001-00042082 | 2001-02-19 |
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KR100520475B1 true KR100520475B1 (ko) | 2005-10-11 |
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US (2) | US7076947B2 (ko) |
EP (1) | EP1286057B1 (ko) |
JP (1) | JP3865590B2 (ko) |
KR (1) | KR100520475B1 (ko) |
CN (1) | CN1288354C (ko) |
DE (1) | DE60237866D1 (ko) |
WO (1) | WO2002066841A1 (ko) |
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KR101770672B1 (ko) | 2013-11-28 | 2017-08-23 | 가부시키가이샤 히다치 겡키 티에라 | 건설기계의 유압 구동 장치 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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KR101770672B1 (ko) | 2013-11-28 | 2017-08-23 | 가부시키가이샤 히다치 겡키 티에라 | 건설기계의 유압 구동 장치 |
KR101770674B1 (ko) | 2014-02-04 | 2017-08-23 | 가부시키가이샤 히다치 겡키 티에라 | 건설기계의 유압 구동 장치 |
Also Published As
Publication number | Publication date |
---|---|
EP1286057A4 (en) | 2009-08-19 |
DE60237866D1 (de) | 2010-11-18 |
US20040020082A1 (en) | 2004-02-05 |
US7076947B2 (en) | 2006-07-18 |
EP1286057B1 (en) | 2010-10-06 |
WO2002066841A1 (fr) | 2002-08-29 |
JP2002242904A (ja) | 2002-08-28 |
JP3865590B2 (ja) | 2007-01-10 |
CN1288354C (zh) | 2006-12-06 |
EP1286057A1 (en) | 2003-02-26 |
KR20020091215A (ko) | 2002-12-05 |
US7272928B2 (en) | 2007-09-25 |
CN1457398A (zh) | 2003-11-19 |
US20060207248A1 (en) | 2006-09-21 |
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