ES431959A1 - Hydraulic controls - Google Patents
Hydraulic controlsInfo
- Publication number
- ES431959A1 ES431959A1 ES431959A ES431959A ES431959A1 ES 431959 A1 ES431959 A1 ES 431959A1 ES 431959 A ES431959 A ES 431959A ES 431959 A ES431959 A ES 431959A ES 431959 A1 ES431959 A1 ES 431959A1
- Authority
- ES
- Spain
- Prior art keywords
- pump
- auxiliary pump
- main
- flow
- loader vehicle
- 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.)
- Expired
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
- E02F9/08—Superstructures; Supports for superstructures
- E02F9/0841—Articulated frame, i.e. having at least one pivot point between two travelling gear units
-
- 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
- E02F9/2203—Arrangements for controlling the attitude of actuators, e.g. speed, floating function
- E02F9/2207—Arrangements for controlling the attitude of actuators, e.g. speed, floating function for reducing or compensating oscillations
-
- 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
-
- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control 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
- F15B2211/20—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
- F15B2211/30—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
- F15B2211/50—Pressure control
- F15B2211/505—Pressure control characterised by the type of pressure control means
- F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
- F15B2211/50536—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using unloading valves controlling the supply pressure by diverting fluid to the return line
-
- 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
- F15B2211/50—Pressure control
- F15B2211/52—Pressure control characterised by the type of actuation
- F15B2211/528—Pressure 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
- F15B2211/63—Electronic controllers
- F15B2211/6303—Electronic controllers using input signals
- F15B2211/6306—Electronic controllers using input signals representing a pressure
- F15B2211/6313—Electronic controllers using input signals representing a pressure the pressure being a 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
- F15B2211/60—Circuit components or control therefor
- F15B2211/63—Electronic controllers
- F15B2211/6303—Electronic controllers using input signals
- F15B2211/634—Electronic controllers using input signals representing a state of a 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
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
-
- 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)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (AREA)
- Servomotors (AREA)
Abstract
A hydraulic circuit particularly useful for a loader vehicle is provided with a main pump and an auxiliary pump. The flow of the auxiliary pump may be selectively added to the flow of the main pump but is diverted to the reservoir if the system pressure rises above a predetermined level. A delay device is incorporated in the control to prevent rapid switches of the auxiliary pump into and out of the main circuit and so prevent undesirable vibrations in the loader vehicle.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19732356809 DE2356809C3 (en) | 1973-11-14 | Hydraulic systems for vehicles, in particular construction machines |
Publications (1)
Publication Number | Publication Date |
---|---|
ES431959A1 true ES431959A1 (en) | 1976-10-16 |
Family
ID=5898078
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES431959A Expired ES431959A1 (en) | 1973-11-14 | 1974-11-14 | Hydraulic controls |
Country Status (7)
Country | Link |
---|---|
US (1) | US3916624A (en) |
BR (1) | BR7409621A (en) |
CA (1) | CA1025749A (en) |
ES (1) | ES431959A1 (en) |
FR (1) | FR2250908B3 (en) |
GB (1) | GB1466605A (en) |
IT (1) | IT1025707B (en) |
Families Citing this family (33)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4006662A (en) * | 1972-11-22 | 1977-02-08 | Danfoss A/S | Hydraulic Steering apparatus |
DE2535195C2 (en) * | 1975-08-07 | 1985-01-31 | Robert Bosch Gmbh, 7000 Stuttgart | Hydraulic control device |
US4188772A (en) * | 1977-06-06 | 1980-02-19 | Harrington Manufacturing Company | Hydraulic speed control system for the pick-up reel of a peanut combine |
US4537029A (en) * | 1982-09-23 | 1985-08-27 | Vickers, Incorporated | Power transmission |
IT1234937B (en) * | 1985-02-14 | 1992-06-02 | Cinotto Hydraulic | ANTI-SATURATION SYSTEM FOR HYDRAULIC CONTROL CIRCUITS WITH PUMPS AND PRESSURE-CONTROLLED DISTRIBUTORS FOR WORKING PARTS OF EARTH-MOVING MACHINES |
DE3516429A1 (en) * | 1985-05-08 | 1986-11-13 | Rudolf Hausherr & Söhne GmbH & Co KG, 4322 Sprockhövel | CIRCUIT ARRANGEMENT FOR HYDRAULIC APPLICATION OF THE AGGREGATE OF A LOADER |
US4858345A (en) * | 1987-02-04 | 1989-08-22 | Kabushiki Kaisha Komatsu Siesakusho | Front frames of wheel mounted type loaders |
GB2215700A (en) * | 1988-03-16 | 1989-09-27 | Massey Ferguson Mfg | Hydraulic circuits |
JP2511629Y2 (en) * | 1988-05-16 | 1996-09-25 | 株式会社小松製作所 | Hydraulic circuit |
JPH0751796B2 (en) * | 1989-04-18 | 1995-06-05 | 株式会社クボタ | Backhoe hydraulic circuit |
WO1993019254A1 (en) * | 1992-03-17 | 1993-09-30 | Schneider Hans Sr | Process and device for removing the gravel layer from flat roofs |
AT399130B (en) * | 1992-03-18 | 1995-03-27 | Hoerbiger Fluidtechnik Gmbh | ARRANGEMENT FOR HYDRAULICALLY OPERATING A VEHICLE TOP |
GB9414694D0 (en) * | 1994-07-21 | 1994-09-07 | Thwaites Limited | A dumper vehicle |
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 |
AU720849B2 (en) * | 1996-03-28 | 2000-06-15 | Clark Equipment Company | Multifunction valve stack |
IT1289120B1 (en) * | 1996-07-04 | 1998-09-25 | Fki Fai Komatsu Ind Spa | HYDRAULIC CONTROL CIRCUIT FOR WORKING PARTS, IN PARTICULAR IN EARTH-MOVING MACHINES |
US6241420B1 (en) | 1999-08-31 | 2001-06-05 | Caterpillar Paving Products Inc. | Control system for a vibratory compactor |
US6840334B2 (en) * | 2002-10-23 | 2005-01-11 | Lonnie L. Marquardt | Grader attachment for a skid steer |
US6901754B2 (en) * | 2003-10-01 | 2005-06-07 | Husco International, Inc. | Power conserving hydraulic pump bypass compensator circuit |
US7537079B2 (en) * | 2005-03-23 | 2009-05-26 | Clark Equipment Company | Passively rephasing piston |
US7506719B2 (en) * | 2005-03-23 | 2009-03-24 | Clark Equipment Company | Self-synchronizing hydraulic system |
US7316111B2 (en) * | 2006-01-13 | 2008-01-08 | Clark Equipment Company | Multi-purpose hydraulic system |
US7481052B2 (en) * | 2006-04-17 | 2009-01-27 | Clark Equipment Company | Fluid circuit with multiple flows from a series valve |
ATE497064T1 (en) * | 2007-11-29 | 2011-02-15 | Caterpillar Inc | METHOD OF OPERATING A MACHINE EQUIPPED WITH A HYDRAULIC WORKING ARM SYSTEM AND MACHINE EQUIPPED WITH A HYDRAULIC WORKING ARM SYSTEM WITH CHARGING POSSIBILITY. |
US8152406B1 (en) * | 2010-11-08 | 2012-04-10 | Saudi Arabian Oil Company | Crash barrier with over-pressure relief system |
US8152407B1 (en) * | 2010-11-08 | 2012-04-10 | Saudi Arabian Oil Company | Auxiliary pressure relief reservoir for crash barrier |
US8997478B2 (en) * | 2011-09-22 | 2015-04-07 | Deere & Company | Multi-pump system with pump-flow diversion |
JP2016080084A (en) * | 2014-10-17 | 2016-05-16 | 三菱重工業株式会社 | Follow-up pressure device, machine tool and operational method for follow-up pressure device at machine tool |
US9470246B1 (en) * | 2015-06-05 | 2016-10-18 | Cnh Industrial America Llc | Hydraulic actuation system for work machine |
US9845590B2 (en) * | 2015-08-06 | 2017-12-19 | Caterpillar Inc. | Hydraulic system for an earth moving machine |
US10352335B2 (en) * | 2015-12-22 | 2019-07-16 | Kubota Corporation | Hydraulic system of work machine |
KR102394557B1 (en) * | 2016-12-12 | 2022-05-04 | 현대자동차 주식회사 | Hydraulic control system of automatic transmission for idle stop & go vehicles |
CN115342091A (en) * | 2021-05-12 | 2022-11-15 | 哈威油液压技术(无锡)有限公司 | Hydraulic control system |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2323519A (en) * | 1941-01-24 | 1943-07-06 | Ternstedt Mfg Co | Vacuum operated window regulator |
US3171247A (en) * | 1962-05-24 | 1965-03-02 | Webster Electric Co Inc | Motor vehicle and hydraulic system |
US3443380A (en) * | 1968-01-02 | 1969-05-13 | Allis Chalmers Mfg Co | Two-pump system for lift cylinder |
-
1974
- 1974-11-08 FR FR7437037A patent/FR2250908B3/fr not_active Expired
- 1974-11-13 US US523378A patent/US3916624A/en not_active Expired - Lifetime
- 1974-11-14 CA CA213,737A patent/CA1025749A/en not_active Expired
- 1974-11-14 GB GB4926174A patent/GB1466605A/en not_active Expired
- 1974-11-14 IT IT29444/74A patent/IT1025707B/en active
- 1974-11-14 BR BR9621/74A patent/BR7409621A/en unknown
- 1974-11-14 ES ES431959A patent/ES431959A1/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
CA1025749A (en) | 1978-02-07 |
GB1466605A (en) | 1977-03-09 |
DE2356809A1 (en) | 1975-06-19 |
IT1025707B (en) | 1978-08-30 |
FR2250908A1 (en) | 1975-06-06 |
BR7409621A (en) | 1976-05-25 |
DE2356809B2 (en) | 1976-02-19 |
US3916624A (en) | 1975-11-04 |
FR2250908B3 (en) | 1977-08-12 |
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