DE3862874D1 - HYDRAULIC SYSTEM FOR AN EARTHMOVER. - Google Patents
HYDRAULIC SYSTEM FOR AN EARTHMOVER.Info
- Publication number
- DE3862874D1 DE3862874D1 DE8888102009T DE3862874T DE3862874D1 DE 3862874 D1 DE3862874 D1 DE 3862874D1 DE 8888102009 T DE8888102009 T DE 8888102009T DE 3862874 T DE3862874 T DE 3862874T DE 3862874 D1 DE3862874 D1 DE 3862874D1
- Authority
- DE
- Germany
- Prior art keywords
- earthmover
- hydraulic system
- hydraulic
- 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 - Fee Related
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
- F15B11/16—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
-
- 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
- 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
- F15B2211/30—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
- F15B2211/3111—Neutral or centre positions the pump port being closed in the centre position, e.g. so-called closed 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
- F15B2211/35—Directional control combined with flow control
- F15B2211/351—Flow control by regulating means in feed line, i.e. meter-in control
-
- 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
- F15B2211/35—Directional control combined with flow control
- F15B2211/353—Flow control by regulating means in return line, i.e. meter-out control
-
- 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
- F15B2211/65—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
- F15B2211/60—Circuit components or control therefor
- F15B2211/665—Methods of control using electronic components
- F15B2211/6651—Control of the prime mover, e.g. control of the output torque or rotational speed
-
- 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
- F15B2211/715—Output members, e.g. hydraulic motors or cylinders or control therefor having braking 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
- F15B2211/70—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)
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US1631987A | 1987-02-19 | 1987-02-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3862874D1 true DE3862874D1 (en) | 1991-06-27 |
Family
ID=21776542
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE8888102009T Expired - Fee Related DE3862874D1 (en) | 1987-02-19 | 1988-02-11 | HYDRAULIC SYSTEM FOR AN EARTHMOVER. |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0279356B1 (en) |
JP (1) | JP2589736B2 (en) |
CA (1) | CA1278978C (en) |
DE (1) | DE3862874D1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2831377B2 (en) * | 1988-07-04 | 1998-12-02 | 日立建機株式会社 | Engine speed control device for construction machinery |
JPH07112836B2 (en) * | 1991-06-14 | 1995-12-06 | 富士重工業株式会社 | Aircraft hydraulic steering system |
GB2311385B (en) * | 1996-03-23 | 2000-07-19 | Trinova Ltd | A fluid power control circuit |
CN104500481B (en) * | 2014-12-31 | 2017-10-31 | 中联重科股份有限公司 | Load sensitive control system and its control method and the hydraulic test with the system |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1634915C3 (en) * | 1967-03-10 | 1981-02-12 | O & K Orenstein & Koppel Ag | Circuit for hydraulic excavator |
DE2038968C3 (en) * | 1970-08-05 | 1978-09-07 | Ludwig 7917 Voehringen Wagenseil | Capacity control device for two or more hydraulic pumps |
DE2052303A1 (en) * | 1970-10-24 | 1972-04-27 | Rheinstahl Aktiengesellschaft Hanomag Baumaschinen, 3000 Hannover-Linden | Hydraulic system for grading machines, loading machines, excavators and the like |
US4017215A (en) * | 1976-03-15 | 1977-04-12 | Caterpillar Tractor Co. | Infinitely variable orifice for part throttle control |
US4073141A (en) * | 1977-03-17 | 1978-02-14 | Caterpillar Tractor Co. | Fluid control system with priority flow |
JPS5817202A (en) * | 1981-07-24 | 1983-02-01 | Hitachi Constr Mach Co Ltd | Control unit for hydraulic circuit |
JPS58213927A (en) * | 1982-06-07 | 1983-12-13 | Daikin Ind Ltd | Construction machine such as power shovel |
EP0235545B1 (en) * | 1986-01-25 | 1990-09-12 | Hitachi Construction Machinery Co., Ltd. | Hydraulic drive system |
IT1187892B (en) * | 1986-02-04 | 1987-12-23 | Chs Vickers Spa | HYDRAULIC CONTROL CIRCUIT FOR WORKING BODIES OF EARTH-MOVING MACHINES WITH CENTRALIZED ACTUATOR BRAKING |
-
1988
- 1988-02-02 CA CA000557947A patent/CA1278978C/en not_active Expired - Fee Related
- 1988-02-11 EP EP19880102009 patent/EP0279356B1/en not_active Expired
- 1988-02-11 DE DE8888102009T patent/DE3862874D1/en not_active Expired - Fee Related
- 1988-02-19 JP JP63037319A patent/JP2589736B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0279356B1 (en) | 1991-05-22 |
JPS63217025A (en) | 1988-09-09 |
JP2589736B2 (en) | 1997-03-12 |
EP0279356A1 (en) | 1988-08-24 |
CA1278978C (en) | 1991-01-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
NO895294L (en) | HYDRAULIC SYSTEM. | |
DE3764824D1 (en) | HYDRAULIC DRIVE SYSTEM. | |
DE3788219D1 (en) | VEHICLE LOCATION SYSTEM. | |
NO874761D0 (en) | HYDRAULIC CEMENT-SLURRY. | |
DE3876518T2 (en) | HYDRAULIC DRIVE SYSTEM. | |
DE69020415T2 (en) | Electro-hydraulic system. | |
DE3867545D1 (en) | HYDRAULIC ANTI-BLOCK BRAKING SYSTEM. | |
DE3773216D1 (en) | ANTI-BLOCKED BRAKE SYSTEM. | |
DE3879285T2 (en) | HYDRAULIC CHECKING PROCEDURE FOR TOOLS. | |
DE69000672T2 (en) | HYDRAULIC CIRCUIT FOR AN EARTHMOVER. | |
IT8822562A0 (en) | HYDROSTATIC RESVOSTEERING FOR VEHICLES. | |
DE3787266T2 (en) | Electro-hydraulic auxiliary system. | |
DE3883690D1 (en) | Hydraulic drive system. | |
DE68909946T2 (en) | HYDRAULIC SYSTEM. | |
DE3776864D1 (en) | HYDRAULIC SYSTEM FOR VEHICLES. | |
DE58900149D1 (en) | HYDRAULIC BRAKE SYSTEM. | |
DE69001326D1 (en) | ELECTROHYDRAULIC SYSTEM. | |
DE3781522T2 (en) | HYDRAULIC DRIVE SYSTEM. | |
DE3862874D1 (en) | HYDRAULIC SYSTEM FOR AN EARTHMOVER. | |
DE3862025D1 (en) | PARKING SYSTEM. | |
DE3868661D1 (en) | HYDRAULIC DRIVE SYSTEM. | |
NO892694D0 (en) | HYDRAULIC / PNEVMATICAL SYSTEM MEASUREMENT. | |
DE68901155D1 (en) | GUIDE SYSTEM FOR HYDRAULIC ELEVATOR. | |
DE3860635D1 (en) | HYDRAULIC AUXILIARY SYSTEM FOR BRAKE CIRCUIT. | |
DE3861194D1 (en) | HYDRAULIC SYSTEM. |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |