IT991257B - CONTROL DEVICE FOR HYDRAULIC SYSTEMS - Google Patents

CONTROL DEVICE FOR HYDRAULIC SYSTEMS

Info

Publication number
IT991257B
IT991257B IT26534/73A IT2653473A IT991257B IT 991257 B IT991257 B IT 991257B IT 26534/73 A IT26534/73 A IT 26534/73A IT 2653473 A IT2653473 A IT 2653473A IT 991257 B IT991257 B IT 991257B
Authority
IT
Italy
Prior art keywords
control device
hydraulic systems
hydraulic
systems
control
Prior art date
Application number
IT26534/73A
Other languages
Italian (it)
Original Assignee
Borg Warner
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Borg Warner filed Critical Borg Warner
Application granted granted Critical
Publication of IT991257B publication Critical patent/IT991257B/en

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
    • 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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/022—Flow-dividers; Priority 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
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20538—Type of pump constant capacity
    • 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
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
    • F15B2211/3053—In combination with a pressure compensating valve
    • F15B2211/30535—In combination with a pressure compensating valve the pressure compensating valve is arranged between pressure source and 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
    • F15B2211/31—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
    • F15B2211/50—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
    • F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
    • F15B2211/5157—Pressure control characterised by the connections of the pressure control means in the circuit being connected to a pressure source and a 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
    • F15B2211/60—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
    • F15B2211/6052—Load sensing circuits having valve means between output member and the load sensing circuit using 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
    • F15B2211/60—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
    • F15B2211/605—Load sensing circuits
    • F15B2211/6051—Load sensing circuits having valve means between output member and the load sensing circuit
    • F15B2211/6055—Load sensing circuits having valve means between output member and the load sensing circuit using pressure relief 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
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
    • F15B2211/7107—Multiple output members, e.g. multiple hydraulic motors or cylinders the output members being mechanically linked
    • 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
    • F15B2211/781—Control of multiple output members one or more output members having priority

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Operation Control Of Excavators (AREA)
IT26534/73A 1972-07-13 1973-07-12 CONTROL DEVICE FOR HYDRAULIC SYSTEMS IT991257B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US27130472A 1972-07-13 1972-07-13

Publications (1)

Publication Number Publication Date
IT991257B true IT991257B (en) 1975-07-30

Family

ID=23035019

Family Applications (1)

Application Number Title Priority Date Filing Date
IT26534/73A IT991257B (en) 1972-07-13 1973-07-12 CONTROL DEVICE FOR HYDRAULIC SYSTEMS

Country Status (12)

Country Link
US (1) US3768372A (en)
JP (1) JPS5642764B2 (en)
BE (1) BE802106A (en)
BR (1) BR7305241D0 (en)
CA (1) CA981147A (en)
DE (1) DE2335704C2 (en)
FR (1) FR2193157B1 (en)
GB (1) GB1404562A (en)
IT (1) IT991257B (en)
NL (1) NL175941B (en)
SE (1) SE398538B (en)
ZA (1) ZA734474B (en)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3942413A (en) * 1974-08-01 1976-03-09 Borg-Warner Corporation Load limiting system
US4199005A (en) * 1976-08-20 1980-04-22 Tadeusz Budzich Load responsive control valve
US4157736A (en) * 1978-01-11 1979-06-12 Carbert Ralph E Overload protection apparatus for hydraulic multi-function equipment
US4222409A (en) * 1978-10-06 1980-09-16 Tadeusz Budzich Load responsive fluid control valve
JPS5620803A (en) * 1979-07-27 1981-02-26 Daikin Ind Ltd Hydraulic circuit
WO1981001595A1 (en) * 1979-11-29 1981-06-11 J Harmon Flow metering valve with operator selectable boosted flow
US4282898A (en) * 1979-11-29 1981-08-11 Caterpillar Tractor Co. Flow metering valve with operator selectable boosted flow
JPS5697023A (en) * 1980-01-07 1981-08-05 Komatsu Ltd Semiautomatic oil pressure excavator
JPS57116917A (en) * 1981-01-13 1982-07-21 Toshiba Mach Co Ltd Compound control valve with valve for attachment
US4437307A (en) * 1982-03-11 1984-03-20 Caterpillar Tractor Company Priority flow control system
JPS58181376A (en) * 1982-04-16 1983-10-24 Hitachi Ltd Recording head for electronic camera
US4693272A (en) * 1984-02-13 1987-09-15 Husco International, Inc. Post pressure compensated unitary hydraulic valve
DE3421502C2 (en) * 1984-06-08 1986-11-20 Mannesmann Rexroth GmbH, 8770 Lohr Hydraulic priority control device for at least two servomotors
DE4241846C2 (en) * 1992-12-11 1996-09-26 Danfoss As Hydraulic system
KR100348128B1 (en) * 1994-09-30 2002-11-22 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 Control valve with variable priority
KR100226281B1 (en) * 1994-09-30 1999-10-15 토니헬샴 Variable priority device
JPH08100446A (en) * 1994-09-30 1996-04-16 Samsung Heavy Ind Co Ltd Variable preferential apparatus for heavy equipment
DE102005060124B4 (en) * 2005-12-16 2011-05-05 Jost-Werke Gmbh Displacement device for a fifth wheel arranged on a towing vehicle
JP5485007B2 (en) * 2010-05-07 2014-05-07 日立建機株式会社 Hydraulic control device for work vehicle
JP5758348B2 (en) * 2012-06-15 2015-08-05 住友建機株式会社 Hydraulic circuit for construction machinery
KR101741703B1 (en) * 2013-01-24 2017-05-30 볼보 컨스트럭션 이큅먼트 에이비 Device and method for controlling flow rate in construction machinery
EP3009690A4 (en) * 2013-06-14 2017-01-25 Volvo Construction Equipment AB Flow rate control valve for construction machine
EP2891806A1 (en) * 2014-01-03 2015-07-08 Danfoss Power Solutions Aps A hydraulic valve arrangement

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2737196A (en) * 1952-06-04 1956-03-06 Eaton Mfg Co Flow divider valve
DE1060681B (en) * 1956-02-02 1959-07-02 Hobourn Eaton Mfg Company Ltd Automatic control valve
US2892311A (en) * 1958-01-08 1959-06-30 Deere & Co Hydraulic apparatus
US3179120A (en) * 1963-05-24 1965-04-20 Koehring Co Proportional flow divider
US3465519A (en) * 1967-08-18 1969-09-09 Webster Electric Co Inc Hydraulic flow controlling apparatus
US3550505A (en) * 1969-05-07 1970-12-29 Gen Signal Corp Hydraulic system including two work circuits
US3631890A (en) * 1970-04-06 1972-01-04 Borg Warner Flow extending bypass valve

Also Published As

Publication number Publication date
DE2335704A1 (en) 1974-01-24
FR2193157B1 (en) 1976-09-17
FR2193157A1 (en) 1974-02-15
DE2335704C2 (en) 1984-04-26
JPS4944180A (en) 1974-04-25
CA981147A (en) 1976-01-06
GB1404562A (en) 1975-09-03
BR7305241D0 (en) 1974-08-15
JPS5642764B2 (en) 1981-10-07
ZA734474B (en) 1975-01-29
NL175941B (en) 1984-08-16
NL7309724A (en) 1974-01-15
US3768372A (en) 1973-10-30
BE802106A (en) 1973-11-05
SE398538B (en) 1977-12-27
AU5774773A (en) 1975-01-09

Similar Documents

Publication Publication Date Title
IT991257B (en) CONTROL DEVICE FOR HYDRAULIC SYSTEMS
SE7501932L (en) PULSE DAMPING DEVICE FOR HYDRAULIC SYSTEMS.
SE396799B (en) HYDRAULIC CONTROL SYSTEM
IT978683B (en) AUTOMATIC CONTROL SYSTEM
IT983558B (en) CONTROL SYSTEM
SE390429B (en) HYDRAULIC SYSTEM
IT1042139B (en) HYDRAULIC CONTROL SYSTEM
IT980392B (en) CONTROL SYSTEM FOR HYDROFOILS
BE765306A (en) HYDRAULIC CONTROL SYSTEMS
BE806717A (en) HYDRAULIC CONTROL SYSTEM
CH542076A (en) Anti-lock control system
IT1006719B (en) HYDRAULIC CONTROL DEVICE
AT344469B (en) HYDRAULIC CONTROL DEVICE
IT1003472B (en) HYDRAULIC CONTROL DEVICE
IT939909B (en) VALVE ARRANGEMENT FOR HYDRAULIC STEERING SYSTEMS
IT1001973B (en) HYDRAULIC CONTROL DEVICE
AT323075B (en) ELECTROHYDRAULIC CONTROL DEVICE
SE399677B (en) CONTROL SYSTEM
TR17145A (en) V-MUHARRIK SYSTEM
AT295331B (en) Hydraulic control system
CH500407A (en) Hydraulic control device
IT985882B (en) CONTROL DEVICE FOR WIPER
IT989064B (en) HYDRAULIC SERVO CONTROL DEVICE
CH552140A (en) HYDRAULIC CHANGEOVER CONTROL DEVICE.
IT991804B (en) CONTROL DEVICE FOR HYDRAULIC STEERING AND SIMILAR SYSTEMS