AT334217B - HYDRAULIC CONTROL SYSTEM - Google Patents
HYDRAULIC CONTROL SYSTEMInfo
- Publication number
- AT334217B AT334217B AT605474A AT605474A AT334217B AT 334217 B AT334217 B AT 334217B AT 605474 A AT605474 A AT 605474A AT 605474 A AT605474 A AT 605474A AT 334217 B AT334217 B AT 334217B
- Authority
- AT
- Austria
- Prior art keywords
- control system
- hydraulic control
- hydraulic
- control
- Prior art date
Links
Classifications
-
- 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
- F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
- F15B11/05—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed specially adapted to maintain constant speed, e.g. pressure-compensated, load-responsive
- F15B11/055—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed specially adapted to maintain constant speed, e.g. pressure-compensated, load-responsive by adjusting the pump output or bypass
-
- 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
- F15B2211/25—Pressure control functions
- F15B2211/253—Pressure margin control, e.g. pump pressure in relation to load 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
- F15B2211/30—Directional control
- F15B2211/305—Directional control characterised by the type of valves
- F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
-
- 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
- F15B2211/321—Directional control characterised by the type of actuation mechanically
- F15B2211/324—Directional control characterised by the type of actuation mechanically manually, e.g. by using a lever or pedal
-
- 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
- F15B2211/321—Directional control characterised by the type of actuation mechanically
- F15B2211/325—Directional control characterised by the type of actuation mechanically actuated by an output member of the circuit
-
- 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
- F15B2211/705—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
- F15B2211/7052—Single-acting output members
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S60/00—Power plants
- Y10S60/911—Fluid motor system incorporating electrical system
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Fluid Gearings (AREA)
- Fluid-Pressure Circuits (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00382516A US3826090A (en) | 1973-07-25 | 1973-07-25 | Variable pressure hydraulic system |
Publications (2)
Publication Number | Publication Date |
---|---|
AT334217B true AT334217B (en) | 1976-01-10 |
ATA605474A ATA605474A (en) | 1976-04-15 |
Family
ID=23509303
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT605474A AT334217B (en) | 1973-07-25 | 1974-07-23 | HYDRAULIC CONTROL SYSTEM |
Country Status (11)
Country | Link |
---|---|
US (1) | US3826090A (en) |
AR (1) | AR203758A1 (en) |
AT (1) | AT334217B (en) |
AU (1) | AU469509B2 (en) |
CA (1) | CA987201A (en) |
DE (1) | DE2434840A1 (en) |
ES (1) | ES428612A1 (en) |
FR (1) | FR2238852B1 (en) |
GB (1) | GB1474421A (en) |
IT (1) | IT1016981B (en) |
SE (1) | SE412446B (en) |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4006662A (en) * | 1972-11-22 | 1977-02-08 | Danfoss A/S | Hydraulic Steering apparatus |
US3945175A (en) * | 1973-10-02 | 1976-03-23 | International Harvester Company | Variable speed feed roll drive mechanism for forage harvesters |
US3875746A (en) * | 1974-04-18 | 1975-04-08 | Amf Inc | Electrical control for hydraulic waste compactor |
DE2531492C2 (en) * | 1975-07-15 | 1982-09-16 | Robert Bosch Gmbh, 7000 Stuttgart | Adjustable hydrostatic pump |
US3990237A (en) * | 1975-12-29 | 1976-11-09 | Deere & Company | Deman compensated hydraulic system with pressure amplifier |
US3973399A (en) * | 1975-12-29 | 1976-08-10 | Deere & Company | Demand compensated hydraulic system with pilot line dither |
US4004418A (en) * | 1975-12-29 | 1977-01-25 | Deere & Company | Demand compensated hydraulic system with flow sensitive device |
US3995425A (en) * | 1976-03-08 | 1976-12-07 | Deere & Company | Demand compensated hydraulic system with pilot line pressure-maintaining valve |
DE2811585C2 (en) * | 1978-03-17 | 1987-11-12 | Mannesmann Rexroth GmbH, 8770 Lohr | Hydraulic adjusting device with return device |
US4215543A (en) * | 1979-04-09 | 1980-08-05 | C. A. Lawton Company | Method and apparatus for linear and nonlinear control of a hydraulic press |
DE3109045A1 (en) * | 1981-03-10 | 1982-09-16 | Alfred Teves Gmbh, 6000 Frankfurt | ADJUSTABLE HYDRAULIC PUMP |
AU552866B2 (en) * | 1981-05-18 | 1986-06-26 | Deere & Company | Power-on-demand hydraulic system |
AU1928283A (en) * | 1982-11-26 | 1984-05-31 | Vickers Incorporated | Power transmission |
IT1161583B (en) * | 1983-02-25 | 1987-03-18 | Same Spa | IMPROVEMENTS IN HYDRAULIC POWER SUPPLY CIRCUITS |
SE459686B (en) * | 1986-10-13 | 1989-07-24 | Akermans Verkstad Ab | PROCEDURE AND DEVICE FOR CHANGING THE MAXIMUM EASY ACCESSIBLE HYDRAULAR PRESSURE OF THE PUMP SYSTEM IN AN EXCAVATOR |
US4813235A (en) * | 1987-06-09 | 1989-03-21 | Deere & Company | Hydraulic gain reduction circuit |
DE3733677A1 (en) * | 1987-10-05 | 1989-04-13 | Rexroth Mannesmann Gmbh | LOAD-INDEPENDENT CONTROL DEVICE FOR HYDRAULIC CONSUMERS |
DE3910895A1 (en) * | 1987-10-05 | 1990-10-11 | Rexroth Mannesmann Gmbh | Control arrangement independent of load for hydraulic consumers |
JP3115887B2 (en) * | 1990-09-28 | 2000-12-11 | 株式会社小松製作所 | Variable circuit of pump displacement in closed center load sensing system |
EP3514394A1 (en) | 2010-05-11 | 2019-07-24 | Parker Hannifin Corp. | Pressure compensated hydraulic system having differential pressure control |
CN104533861B (en) * | 2014-12-05 | 2016-08-24 | 中国航空工业集团公司金城南京机电液压工程研究中心 | A kind of switching valve for static test |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2238060A (en) * | 1938-02-08 | 1941-04-15 | Manly Corp | Fluid pressure feed and rapid traverse system of transmission of power |
US3002462A (en) * | 1957-08-13 | 1961-10-03 | Racine Hydraulics & Machinery | Fluid translating apparatus |
US2892311A (en) * | 1958-01-08 | 1959-06-30 | Deere & Co | Hydraulic apparatus |
US2892312A (en) * | 1958-01-27 | 1959-06-30 | Deere & Co | Demand compensated hydraulic system |
-
1973
- 1973-07-25 US US00382516A patent/US3826090A/en not_active Expired - Lifetime
- 1973-11-27 AU AU62932/73A patent/AU469509B2/en not_active Expired
-
1974
- 1974-01-03 CA CA189,403A patent/CA987201A/en not_active Expired
- 1974-07-19 DE DE2434840A patent/DE2434840A1/en active Pending
- 1974-07-23 SE SE7409586A patent/SE412446B/en not_active IP Right Cessation
- 1974-07-23 AT AT605474A patent/AT334217B/en not_active IP Right Cessation
- 1974-07-24 AR AR254880A patent/AR203758A1/en active
- 1974-07-24 IT IT52259/74A patent/IT1016981B/en active
- 1974-07-24 FR FR7425619A patent/FR2238852B1/fr not_active Expired
- 1974-07-24 ES ES428612A patent/ES428612A1/en not_active Expired
- 1974-07-24 GB GB3276074A patent/GB1474421A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
CA987201A (en) | 1976-04-13 |
US3826090A (en) | 1974-07-30 |
FR2238852A1 (en) | 1975-02-21 |
SE7409586L (en) | 1975-02-18 |
FR2238852B1 (en) | 1977-06-24 |
GB1474421A (en) | 1977-05-25 |
ATA605474A (en) | 1976-04-15 |
AU469509B2 (en) | 1976-02-12 |
ES428612A1 (en) | 1976-08-16 |
DE2434840A1 (en) | 1975-02-13 |
AU6293273A (en) | 1975-05-29 |
AR203758A1 (en) | 1975-10-15 |
IT1016981B (en) | 1977-06-20 |
SE412446B (en) | 1980-03-03 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ELJ | Ceased due to non-payment of the annual fee |