EP0105473A3 - Hydraulic circuit with two variable flow pumps controlled by excess flow - Google Patents
Hydraulic circuit with two variable flow pumps controlled by excess flow Download PDFInfo
- Publication number
- EP0105473A3 EP0105473A3 EP83109740A EP83109740A EP0105473A3 EP 0105473 A3 EP0105473 A3 EP 0105473A3 EP 83109740 A EP83109740 A EP 83109740A EP 83109740 A EP83109740 A EP 83109740A EP 0105473 A3 EP0105473 A3 EP 0105473A3
- Authority
- EP
- European Patent Office
- Prior art keywords
- flow
- hydraulic circuit
- pumps controlled
- excess
- variable
- 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.)
- Granted
Links
Classifications
-
- 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
- E02F9/2246—Control of prime movers, e.g. depending on the hydraulic load of work tools
-
- 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
-
- 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
- E02F9/2239—Control of flow rate; Load sensing arrangements using two or more pumps with cross-assistance
-
- 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
-
- 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
-
- 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
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/20576—Systems with pumps with multiple pumps
-
- 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
- F15B2211/25—Pressure control functions
-
- 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
- F15B2211/30505—Non-return valves, i.e. check valves
-
- 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
- F15B2211/60—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
-
- 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
- F15B2211/65—Methods of control of the load sensing 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (AREA)
- Lifting Devices For Agricultural Implements (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US161082 | 1980-06-19 | ||
US06/161,082 US4335577A (en) | 1980-06-19 | 1980-06-19 | Hydraulic system having variable displacement pumps controlled by power beyond flow |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP81104489.0 Division | 1981-06-11 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0105473A2 EP0105473A2 (en) | 1984-04-18 |
EP0105473A3 true EP0105473A3 (en) | 1987-01-28 |
EP0105473B1 EP0105473B1 (en) | 1988-10-05 |
Family
ID=22579741
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP83109740A Expired EP0105473B1 (en) | 1980-06-19 | 1981-06-11 | Hydraulic circuit with two variable flow pumps controlled by excess flow |
EP81104489A Expired EP0042547B1 (en) | 1980-06-19 | 1981-06-11 | Hydraulic circuit with a variable flow pump controlled by excess flow |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP81104489A Expired EP0042547B1 (en) | 1980-06-19 | 1981-06-11 | Hydraulic circuit with a variable flow pump controlled by excess flow |
Country Status (11)
Country | Link |
---|---|
US (1) | US4335577A (en) |
EP (2) | EP0105473B1 (en) |
JP (1) | JPS5729801A (en) |
AR (1) | AR227546A1 (en) |
AU (1) | AU544947B2 (en) |
BR (1) | BR8103841A (en) |
CA (1) | CA1148446A (en) |
DE (1) | DE3167292D1 (en) |
ES (1) | ES503127A0 (en) |
MX (1) | MX153742A (en) |
ZA (1) | ZA814125B (en) |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4479349A (en) * | 1981-11-19 | 1984-10-30 | General Signal Corporation | Hydraulic control system |
DE3513452A1 (en) * | 1985-04-15 | 1986-10-16 | Mannesmann Rexroth GmbH, 8770 Lohr | HYDRAULIC SYSTEM FOR SUPPLYING A HYDROSTATIC STEERING |
DE4100988C2 (en) * | 1991-01-15 | 2001-05-10 | Linde Ag | Hydraulic drive system |
US5540050A (en) * | 1994-03-01 | 1996-07-30 | Caterpillar Inc. | Hydraulic system providing a positive actuator force |
US5615553A (en) * | 1995-06-28 | 1997-04-01 | Case Corporation | Hydraulic circuit with load sensing feature |
US6672399B2 (en) | 2001-10-19 | 2004-01-06 | Deere & Company | Hydraulic diverting system for utility vehicle |
US6735908B2 (en) | 2002-04-22 | 2004-05-18 | Inscape Corporation | Straddle bin |
SE527405C2 (en) * | 2004-07-26 | 2006-02-28 | Volvo Constr Equip Holding Se | Work vehicle control arrangement e.g. for wheel loader has pressure reducer to reduce pilot pressure delivered to variable displacement pump, to regulate pump displacement for limiting hydraulic power consumption |
DE102004048684A1 (en) * | 2004-10-06 | 2006-04-13 | Bosch Rexroth Ag | Hydraulic control arrangement |
US7401465B2 (en) * | 2005-11-16 | 2008-07-22 | Deere & Company | Dual pump dual pressure hydraulic circuit |
US7954317B2 (en) * | 2007-12-21 | 2011-06-07 | Deere & Company | Hydraulic system |
US9133837B2 (en) * | 2008-04-24 | 2015-09-15 | Caterpillar Inc. | Method of controlling a hydraulic system |
US8483916B2 (en) | 2011-02-28 | 2013-07-09 | Caterpillar Inc. | Hydraulic control system implementing pump torque limiting |
JP5927302B2 (en) | 2011-10-07 | 2016-06-01 | ボルボ コンストラクション イクイップメント アーベー | Priority control system for construction machinery |
US9347200B2 (en) | 2012-06-04 | 2016-05-24 | Cnh Industrial America Llc | Fluid control system for work vehicle |
GB201419777D0 (en) | 2014-11-06 | 2014-12-24 | Agco Int Gmbh | Hydraulic pressure supply system |
CN106678099B (en) * | 2017-01-20 | 2018-06-22 | 徐州徐工施维英机械有限公司 | The power hydraulic system of concrete construction machinery and concrete construction machinery |
DE102017005479A1 (en) * | 2017-06-08 | 2018-12-13 | Hydac Systems & Services Gmbh | Pressure supply device |
DE102017126505B4 (en) * | 2017-11-10 | 2023-06-15 | Syn Trac Gmbh | Hydraulic system for a vehicle and a vehicle with such a hydraulic system |
JP6917871B2 (en) * | 2017-11-22 | 2021-08-11 | キャタピラー エス エー アール エル | Hydraulic control circuit for construction machinery |
CN113638809B (en) * | 2021-07-26 | 2022-11-18 | 中国联合重型燃气轮机技术有限公司 | Emergency breaking device for heavy combustion engine |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3987623A (en) * | 1976-01-23 | 1976-10-26 | Caterpillar Tractor Co. | Controlled priority fluid system of a crawler type vehicle |
US3991571A (en) * | 1976-03-15 | 1976-11-16 | Caterpillar Tractor Co. | Fluid system of a work vehicle having fluid combining means and signal combining means |
US3998053A (en) * | 1976-03-15 | 1976-12-21 | Caterpillar Tractor Co. | Three-pump - three-circuit fluid system of a work vehicle having controlled fluid-combining means |
US4023364A (en) * | 1976-07-19 | 1977-05-17 | Caterpillar Tractor Co. | Swing flow supplemental travel for an excavator |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2716995A (en) * | 1950-09-23 | 1955-09-06 | Gen Motors Corp | Valve for reversible fluid pump |
US2892311A (en) * | 1958-01-08 | 1959-06-30 | Deere & Co | Hydraulic apparatus |
LU52175A1 (en) * | 1965-10-21 | 1966-12-19 | ||
US3455210A (en) * | 1966-10-26 | 1969-07-15 | Eaton Yale & Towne | Adjustable,metered,directional flow control arrangement |
US3465519A (en) * | 1967-08-18 | 1969-09-09 | Webster Electric Co Inc | Hydraulic flow controlling apparatus |
US3718159A (en) * | 1971-01-20 | 1973-02-27 | Hydraulic Industries | Control valve |
US3760689A (en) * | 1972-02-24 | 1973-09-25 | Harnischfeger Corp | Control system for automatically sequencing operation of a plurality of hydraulic pumps for supplying a plurality of hydraulic actuators |
US3863449A (en) * | 1973-08-27 | 1975-02-04 | Trw Inc | Hydraulic motor fluid flow circuitry |
DE2435602C3 (en) * | 1974-07-24 | 1980-06-12 | International Harvester Company Mbh, 4040 Neuss | Automatic control device for distributing the pressure medium to two hydraulic systems |
US4024710A (en) * | 1976-03-25 | 1977-05-24 | Koehring Company | Load sensing hydraulic circuit having power matching means |
US4044786A (en) * | 1976-07-26 | 1977-08-30 | Eaton Corporation | Load sensing steering system with dual power source |
US4055046A (en) * | 1976-12-22 | 1977-10-25 | Caterpillar Tractor Co. | Control system having override for fluid operated work elements |
US4116001A (en) * | 1977-08-01 | 1978-09-26 | International Harvester Company | Simplified load sensitive hydraulic system for use with a vehicle steering system |
US4286502A (en) * | 1979-10-15 | 1981-09-01 | Caterpillar Tractor Co. | Hydraulic load lifting system with automatic blocking valve |
EP0050118B1 (en) * | 1980-04-07 | 1985-12-04 | Caterpillar Tractor Co. | Control for load sharing pumps |
-
1980
- 1980-06-19 US US06/161,082 patent/US4335577A/en not_active Expired - Lifetime
-
1981
- 1981-05-08 AU AU70261/81A patent/AU544947B2/en not_active Ceased
- 1981-05-13 MX MX187290A patent/MX153742A/en unknown
- 1981-05-27 CA CA000378456A patent/CA1148446A/en not_active Expired
- 1981-06-11 EP EP83109740A patent/EP0105473B1/en not_active Expired
- 1981-06-11 EP EP81104489A patent/EP0042547B1/en not_active Expired
- 1981-06-11 DE DE8181104489T patent/DE3167292D1/en not_active Expired
- 1981-06-17 BR BR8103841A patent/BR8103841A/en unknown
- 1981-06-17 ES ES503127A patent/ES503127A0/en active Granted
- 1981-06-18 ZA ZA814125A patent/ZA814125B/en unknown
- 1981-06-19 AR AR285788A patent/AR227546A1/en active
- 1981-06-19 JP JP9517981A patent/JPS5729801A/en active Granted
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3987623A (en) * | 1976-01-23 | 1976-10-26 | Caterpillar Tractor Co. | Controlled priority fluid system of a crawler type vehicle |
US3991571A (en) * | 1976-03-15 | 1976-11-16 | Caterpillar Tractor Co. | Fluid system of a work vehicle having fluid combining means and signal combining means |
US3998053A (en) * | 1976-03-15 | 1976-12-21 | Caterpillar Tractor Co. | Three-pump - three-circuit fluid system of a work vehicle having controlled fluid-combining means |
US4023364A (en) * | 1976-07-19 | 1977-05-17 | Caterpillar Tractor Co. | Swing flow supplemental travel for an excavator |
Also Published As
Publication number | Publication date |
---|---|
ES8300959A1 (en) | 1982-11-01 |
MX153742A (en) | 1986-12-30 |
DE3167292D1 (en) | 1985-01-03 |
AU7026181A (en) | 1981-12-24 |
EP0042547A3 (en) | 1982-08-04 |
EP0105473B1 (en) | 1988-10-05 |
EP0042547B1 (en) | 1984-11-21 |
AU544947B2 (en) | 1985-06-27 |
CA1148446A (en) | 1983-06-21 |
ES503127A0 (en) | 1982-11-01 |
JPS5729801A (en) | 1982-02-17 |
AR227546A1 (en) | 1982-11-15 |
JPH0213164B2 (en) | 1990-04-03 |
ZA814125B (en) | 1983-01-26 |
BR8103841A (en) | 1982-03-09 |
US4335577A (en) | 1982-06-22 |
EP0105473A2 (en) | 1984-04-18 |
EP0042547A2 (en) | 1981-12-30 |
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