JPS5379172A - Control system equipped with nullifying device for hydralically actuated working element - Google Patents
Control system equipped with nullifying device for hydralically actuated working elementInfo
- Publication number
- JPS5379172A JPS5379172A JP14336577A JP14336577A JPS5379172A JP S5379172 A JPS5379172 A JP S5379172A JP 14336577 A JP14336577 A JP 14336577A JP 14336577 A JP14336577 A JP 14336577A JP S5379172 A JPS5379172 A JP S5379172A
- Authority
- JP
- Japan
- Prior art keywords
- hydralically
- control system
- system equipped
- working element
- actuated working
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
-
- 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
- F04B49/002—Hydraulic systems to change the pump delivery
-
- 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
-
- 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
-
- 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
-
- 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
- F15B2211/32—Directional control characterised by the type of actuation
- F15B2211/329—Directional control characterised by the type of actuation actuated by fluid pressure
-
- 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
- F15B2211/635—Circuits providing pilot pressure to pilot pressure-controlled fluid circuit elements
- F15B2211/6355—Circuits providing pilot pressure to pilot pressure-controlled fluid circuit elements having valve means
-
- 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
- F15B2211/67—Methods for controlling pilot pressure
-
- 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
- F15B2211/7142—Multiple output members, e.g. multiple hydraulic motors or cylinders the output members being arranged in multiple groups
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/753,251 US4055046A (en) | 1976-12-22 | 1976-12-22 | Control system having override for fluid operated work elements |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5379172A true JPS5379172A (en) | 1978-07-13 |
Family
ID=25029830
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14336577A Pending JPS5379172A (en) | 1976-12-22 | 1977-12-01 | Control system equipped with nullifying device for hydralically actuated working element |
Country Status (5)
Country | Link |
---|---|
US (1) | US4055046A (ja) |
JP (1) | JPS5379172A (ja) |
BE (1) | BE861190A (ja) |
CA (1) | CA1044569A (ja) |
GB (1) | GB1548792A (ja) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2808196A1 (de) * | 1978-02-25 | 1979-09-06 | Bosch Gmbh Robert | Hydraulische steuereinrichtung |
US4354420A (en) * | 1979-11-01 | 1982-10-19 | Caterpillar Tractor Co. | Fluid motor control system providing speed change by combination of displacement and flow control |
US4335577A (en) * | 1980-06-19 | 1982-06-22 | Deere & Company | Hydraulic system having variable displacement pumps controlled by power beyond flow |
JPS592930A (ja) * | 1982-06-29 | 1984-01-09 | Komatsu Ltd | 油圧駆動式作業車両の油圧回路 |
US4739616A (en) * | 1985-12-13 | 1988-04-26 | Sundstrand Corporation | Summing pressure compensation control |
DE3711053A1 (de) * | 1987-04-02 | 1988-10-20 | Brueninghaus Hydraulik Gmbh | Regeleinrichtung fuer wenigstens zwei mit einer gemeinsamen arbeitsdruckleitung in verbindung stehende hydrostatische maschinen |
DE3711050A1 (de) * | 1987-04-02 | 1988-10-20 | Brueninghaus Hydraulik Gmbh | Regeleinrichtung fuer wenigstens zwei mit einer gemeinsamen arbeitsdruckleitung in verbindung stehende hydrostatische maschinen |
DE3742111A1 (de) * | 1987-04-02 | 1989-06-29 | Brueninghaus Hydraulik Gmbh | Regeleinrichtung fuer wenigstens zwei mit einer gemeinsamen arbeitsdruckleitung in verbindung stehende hydrostatische maschinen veraenderlichen foerder- bzw. schluckvolumens |
JPH07122276B2 (ja) * | 1989-07-07 | 1995-12-25 | 油谷重工株式会社 | 建設機械の油圧ポンプ制御回路 |
US5333452A (en) * | 1992-08-31 | 1994-08-02 | Tony Dameron | Shaft drive hydraulic system and isolated hydraulic system |
US5337561A (en) * | 1992-11-17 | 1994-08-16 | Flow International Corporation | Ultra high pressure multiple intensifier system |
AU720849B2 (en) * | 1996-03-28 | 2000-06-15 | Clark Equipment Company | Multifunction valve stack |
US6018895A (en) * | 1996-03-28 | 2000-02-01 | Clark Equipment Company | Valve stack in a mini-excavator directing fluid under pressure from multiple pumps to actuable elements |
US6003313A (en) * | 1996-10-21 | 1999-12-21 | Farrar; Johnny | High pressure to low pressure exchange system for hydraulic drives |
JP3649139B2 (ja) * | 2001-03-15 | 2005-05-18 | コベルコ建機株式会社 | 走行制御装置 |
SE527434C8 (sv) * | 2004-07-28 | 2006-03-28 | Volvo Constr Equip Holding Se | Hydraulisksystem och arbetsmaskin innefattande ett sådant system |
CN101490424B (zh) * | 2006-05-15 | 2012-05-23 | 株式会社小松制作所 | 液压行驶车辆和液压行驶车辆的控制方法 |
JP6510396B2 (ja) * | 2015-12-28 | 2019-05-08 | 日立建機株式会社 | 作業機械 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3841795A (en) * | 1972-07-17 | 1974-10-15 | Caterpillar Tractor Co | Combined engine speed and pressure responsive control for variable displacement pumps |
US3963378A (en) * | 1975-06-04 | 1976-06-15 | Caterpillar Tractor Co. | Part throttle control -- pump override |
-
1976
- 1976-12-22 US US05/753,251 patent/US4055046A/en not_active Expired - Lifetime
-
1977
- 1977-07-28 GB GB31788/77A patent/GB1548792A/en not_active Expired
- 1977-08-16 CA CA284,803A patent/CA1044569A/en not_active Expired
- 1977-11-25 BE BE1008541A patent/BE861190A/xx not_active IP Right Cessation
- 1977-12-01 JP JP14336577A patent/JPS5379172A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
US4055046A (en) | 1977-10-25 |
GB1548792A (en) | 1979-07-18 |
BE861190A (nl) | 1978-05-25 |
CA1044569A (en) | 1978-12-19 |
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