ES8404021A1 - Disposicion para el control de un cilindro hidraulico de doble accion. - Google Patents

Disposicion para el control de un cilindro hidraulico de doble accion.

Info

Publication number
ES8404021A1
ES8404021A1 ES520993A ES520993A ES8404021A1 ES 8404021 A1 ES8404021 A1 ES 8404021A1 ES 520993 A ES520993 A ES 520993A ES 520993 A ES520993 A ES 520993A ES 8404021 A1 ES8404021 A1 ES 8404021A1
Authority
ES
Spain
Prior art keywords
control circuit
hydraulic motor
position control
double acting
acting 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
Application number
ES520993A
Other languages
English (en)
Other versions
ES520993A0 (es
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Deere and Co
Original Assignee
Deere and Co
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 Deere and Co filed Critical Deere and Co
Publication of ES8404021A1 publication Critical patent/ES8404021A1/es
Publication of ES520993A0 publication Critical patent/ES520993A0/es
Granted legal-status Critical Current

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
    • 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
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
    • F15B13/043—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with electrically-controlled pilot 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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/006—Hydraulic "Wheatstone bridge" circuits, i.e. with four nodes, P-A-T-B, and on-off or proportional valves in each link
    • 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
    • F15B9/00—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member
    • F15B9/02—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type
    • F15B9/03—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type with electrical 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
    • F15B2211/2053—Type of pump
    • F15B2211/20546—Type of pump variable 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
    • F15B2211/30—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
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/30565—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve
    • F15B2211/30575—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve in a Wheatstone Bridge arrangement (also half bridges)
    • 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
    • F15B2211/327—Directional control characterised by the type of actuation electrically or electronically
    • F15B2211/328—Directional control characterised by the type of actuation electrically or electronically with signal modulation, e.g. pulse width modulation [PWM]
    • 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
    • F15B2211/6336—Electronic controllers using input signals representing a state of the output member, e.g. position, speed or acceleration
    • 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
    • F15B2211/6346—Electronic controllers using input signals representing a state of input means, e.g. joystick position
    • 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
    • F15B2211/6653—Pressure 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
    • F15B2211/665—Methods of control using electronic components
    • F15B2211/6654—Flow rate 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
    • F15B2211/665—Methods of control using electronic components
    • F15B2211/6656—Closed loop control, i.e. control using feedback
    • 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
    • F15B2211/7053—Double-acting output members
    • 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
    • F15B2211/77—Control of direction of movement of the output member
    • F15B2211/7733—Control of direction of movement of the output member providing vibrating movement, e.g. dither control for emptying a bucket
    • 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
    • F15B2211/77—Control of direction of movement of the output member
    • F15B2211/7741—Control of direction of movement of the output member with floating mode, e.g. using a direct connection between both lines of a double-acting cylinder

Abstract

DISPOSICION PARA CONTROL DE UN MOTOR HIDRAULICO DE DOBLE ACCION.COMPRENDE CUATRO VALVULAS DE ANILLO (20 A-D) O DISCO DE TIPO PROPORCIONAL, QUE CONTROLAN LA CIRCULACION DE FLUIDO ENTRE EL CILINDRO (10), UNA BOMBA (14) Y UN DEPOSITO (16). ESTAS VALVULAS SON OPERADAS POR VALVULAS PILOTO CONTROLADAS POR UN SOLENOIDE (21 A-D) QUE SE ACTIVAN POR LAS SEÑALES DE ERROR GENERADAS POR UN CIRCUITO DE CONTROL (30), EL CUAL RECIBE UNA SEÑAL DE REALIMENTACION DE LA POSICION DEL CILINDRO, ASI COMO UNA SEÑAL DE MANDO DEL OPERARIO.
ES520993A 1982-04-01 1983-03-25 Disposicion para el control de un cilindro hidraulico de doble accion. Granted ES520993A0 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/364,373 US4437385A (en) 1982-04-01 1982-04-01 Electrohydraulic valve system

Publications (2)

Publication Number Publication Date
ES8404021A1 true ES8404021A1 (es) 1984-04-01
ES520993A0 ES520993A0 (es) 1984-04-01

Family

ID=23434235

Family Applications (1)

Application Number Title Priority Date Filing Date
ES520993A Granted ES520993A0 (es) 1982-04-01 1983-03-25 Disposicion para el control de un cilindro hidraulico de doble accion.

Country Status (12)

Country Link
US (1) US4437385A (es)
EP (1) EP0091018B1 (es)
JP (1) JPH0610481B2 (es)
AT (1) ATE20690T1 (es)
AU (1) AU550989B2 (es)
BR (1) BR8301657A (es)
CA (1) CA1202100A (es)
DE (1) DE3364410D1 (es)
DK (1) DK137783A (es)
ES (1) ES520993A0 (es)
MX (1) MX155212A (es)
ZA (1) ZA832274B (es)

Families Citing this family (54)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2525292B1 (fr) * 1982-04-19 1986-12-19 Chatelin Jacques Servo-moteur hydraulique
US4506700A (en) * 1983-10-07 1985-03-26 Deere & Company Poppet valve with float function
GB8426486D0 (en) * 1984-10-19 1984-11-28 Lucas Ind Plc Electro-hydraulic actuator systems
JPS62297502A (ja) * 1986-06-18 1987-12-24 Kuroda Precision Ind Ltd 空気圧シリンダの駆動制御装置
US4741247A (en) * 1986-09-17 1988-05-03 Rexa Corporation Pneumatic actuator apparatus
AU603907B2 (en) * 1987-06-30 1990-11-29 Hitachi Construction Machinery Co. Ltd. Hydraulic drive system
DE3901475C2 (de) * 1989-01-19 1994-07-14 Danfoss As Fluidgesteuerte Servoanordnung
US5079989A (en) * 1989-06-12 1992-01-14 Vickers, Incorporated Electrohydraulic valve system with a pressure feedback signal modulated by a velocity feedback signal when the velocity exceeds a veloity limit
US4989495A (en) * 1989-08-21 1991-02-05 Hydra-Power Systems, Inc. Hydraulic positioning system with normal and high supply and exhaust flow paths
SE466712B (sv) * 1990-07-24 1992-03-23 Bo Andersson Anordning vid hydraulmotor foer styrning av densamma
US6131500A (en) * 1997-12-05 2000-10-17 Moncrief; Rick L. System and method for producing motion
US6325153B1 (en) 1999-01-05 2001-12-04 Halliburton Energy Services, Inc. Multi-valve fluid flow control system and method
US6691604B1 (en) 1999-09-28 2004-02-17 Caterpillar Inc Hydraulic system with an actuator having independent meter-in meter-out control
DE10006141A1 (de) 2000-02-11 2001-09-06 Zf Lenksysteme Gmbh Elektrohydraulische Steuervorrichtung
FR2807794B1 (fr) * 2000-04-18 2003-02-14 Crouzet Automatismes Servovalve hydraulique a double boucle imbriquee
ATE313016T1 (de) * 2001-08-10 2005-12-15 Zf Lenksysteme Gmbh Steuereinrichtung für die kontinuierliche bewegung eines hydraulischen stellmotors
US6694860B2 (en) 2001-12-10 2004-02-24 Caterpillar Inc Hydraulic control system with regeneration
KR20030052031A (ko) * 2001-12-20 2003-06-26 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 건설중장비용 유압밸브의 제어장치
US6699311B2 (en) 2001-12-28 2004-03-02 Caterpillar Inc Hydraulic quick drop circuit
US6718759B1 (en) 2002-09-25 2004-04-13 Husco International, Inc. Velocity based method for controlling a hydraulic system
US6732512B2 (en) 2002-09-25 2004-05-11 Husco International, Inc. Velocity based electronic control system for operating hydraulic equipment
US6880332B2 (en) 2002-09-25 2005-04-19 Husco International, Inc. Method of selecting a hydraulic metering mode for a function of a velocity based control system
US6779340B2 (en) 2002-09-25 2004-08-24 Husco International, Inc. Method of sharing flow of fluid among multiple hydraulic functions in a velocity based control system
US6775974B2 (en) 2002-09-25 2004-08-17 Husco International, Inc. Velocity based method of controlling an electrohydraulic proportional control valve
US7440821B1 (en) * 2004-01-02 2008-10-21 Sauer-Danfoss Inc. Method of determining average current in a PWM drive
US7121189B2 (en) * 2004-09-29 2006-10-17 Caterpillar Inc. Electronically and hydraulically-actuated drain value
US7146808B2 (en) * 2004-10-29 2006-12-12 Caterpillar Inc Hydraulic system having priority based flow control
US7204084B2 (en) * 2004-10-29 2007-04-17 Caterpillar Inc Hydraulic system having a pressure compensator
US7441404B2 (en) 2004-11-30 2008-10-28 Caterpillar Inc. Configurable hydraulic control system
US7451685B2 (en) * 2005-03-14 2008-11-18 Husco International, Inc. Hydraulic control system with cross function regeneration
US7204185B2 (en) * 2005-04-29 2007-04-17 Caterpillar Inc Hydraulic system having a pressure compensator
US7243493B2 (en) * 2005-04-29 2007-07-17 Caterpillar Inc Valve gradually communicating a pressure signal
US7302797B2 (en) * 2005-05-31 2007-12-04 Caterpillar Inc. Hydraulic system having a post-pressure compensator
US7194856B2 (en) * 2005-05-31 2007-03-27 Caterpillar Inc Hydraulic system having IMV ride control configuration
US7210396B2 (en) * 2005-08-31 2007-05-01 Caterpillar Inc Valve having a hysteretic filtered actuation command
US7331175B2 (en) * 2005-08-31 2008-02-19 Caterpillar Inc. Hydraulic system having area controlled bypass
US7614336B2 (en) * 2005-09-30 2009-11-10 Caterpillar Inc. Hydraulic system having augmented pressure compensation
US20100043418A1 (en) * 2005-09-30 2010-02-25 Caterpillar Inc. Hydraulic system and method for control
US7320216B2 (en) * 2005-10-31 2008-01-22 Caterpillar Inc. Hydraulic system having pressure compensated bypass
JP4353190B2 (ja) * 2006-02-27 2009-10-28 コベルコ建機株式会社 建設機械の油圧回路
US7380398B2 (en) * 2006-04-04 2008-06-03 Husco International, Inc. Hydraulic metering mode transitioning technique for a velocity based control system
US8479504B2 (en) * 2007-05-31 2013-07-09 Caterpillar Inc. Hydraulic system having an external pressure compensator
US7621211B2 (en) * 2007-05-31 2009-11-24 Caterpillar Inc. Force feedback poppet valve having an integrated pressure compensator
US20080295681A1 (en) * 2007-05-31 2008-12-04 Caterpillar Inc. Hydraulic system having an external pressure compensator
US20110017310A1 (en) * 2007-07-02 2011-01-27 Parker Hannifin Ab Fluid valve arrangement
US8348642B2 (en) 2007-10-31 2013-01-08 Schlumberger Technology Corporation Active mud valve system
DE102008013602B4 (de) 2008-03-11 2019-07-04 Robert Bosch Gmbh Verfahren zum Ansteuern einer Vielzahl von Ventilen und Steuerblock mit einer Vielzahl von Ventilen
US8631650B2 (en) * 2009-09-25 2014-01-21 Caterpillar Inc. Hydraulic system and method for control
CA2797322C (en) * 2011-12-01 2019-11-12 Harnischfeger Technologies, Inc. Leveling system
US9309969B2 (en) 2013-02-22 2016-04-12 Cnh Industrial America Llc System and method for controlling a hydrostatic drive unit of a work vehicle
EP2881595B1 (en) * 2013-12-03 2018-08-22 Ansaldo Energia IP UK Limited Device for emergency operation of actuators
US10072681B1 (en) * 2014-06-23 2018-09-11 Vecna Technologies, Inc. Controlling a fluid actuated device
US10563676B1 (en) 2014-06-23 2020-02-18 Vecna Robotics, Inc. Hydrosymbiosis
BE1025480B9 (nl) * 2017-08-18 2019-04-08 Punch Powertrain Nv Elektrisch aanstuurbaar hydraulisch systeem voor een voertuigoverbrenging en een werkwijze voor het aansturen daarvan

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1666748A (en) 1927-03-26 1928-04-17 Motor-controlling apparatus
USRE26028E (en) 1963-05-16 1966-05-17 Pilot operated control valve mechanism
US3714868A (en) 1970-09-23 1973-02-06 Marotta Scientific Controls Valve system for proportional flow control for fluid-operated motor
US3726191A (en) * 1971-02-08 1973-04-10 Bunker Ramo Electrically controlled hydraulic system and transducer therefor
CH563532A5 (es) 1973-03-14 1975-06-30 Buehler Ag Geb
JPS6037321B2 (ja) * 1974-11-30 1985-08-26 株式会社豊田中央研究所 流体アクチユエ−タの制御装置
JPS5229581A (en) * 1975-09-01 1977-03-05 Nippon Spindle Mfg Co Ltd Oil pressure control device
DE2645768C2 (de) 1976-10-09 1983-04-07 Danfoss A/S, 6430 Nordborg Elektrohydraulische Steuervorrichtung
US4282711A (en) 1979-07-26 1981-08-11 Deere & Company Hydrostatic transmission control system
JPS5437378A (en) * 1977-08-30 1979-03-19 Ishikawajima Harima Heavy Ind Co Ltd Removal of hydrogen chloride gas produced in fluidized bed type incinerator
JPS5490721U (es) * 1977-12-12 1979-06-27
US4250794A (en) 1978-03-31 1981-02-17 Caterpillar Tractor Co. High pressure hydraulic system
JPS58876Y2 (ja) * 1978-07-20 1983-01-08 三菱重工業株式会社 原子炉冷却材用加圧装置
JPS55119709A (en) * 1979-03-09 1980-09-13 Hitachi Constr Mach Co Ltd Servo mechanism
US4450753A (en) * 1980-05-12 1984-05-29 Ford Motor Company Electro-hydraulic proportional actuator
FR2484106A1 (fr) * 1980-06-10 1981-12-11 Guettmann Pierre Convertisseur courant-debit a reponse rapide, notamment pour l'asservissement de dispositifs de manoeuvre de charges, ou autres, ou de dispositifs de distribution

Also Published As

Publication number Publication date
BR8301657A (pt) 1983-12-13
ES520993A0 (es) 1984-04-01
DE3364410D1 (en) 1986-08-14
DK137783D0 (da) 1983-03-25
JPS58180803A (ja) 1983-10-22
EP0091018B1 (de) 1986-07-09
DK137783A (da) 1983-10-02
MX155212A (es) 1988-01-29
AU550989B2 (en) 1986-04-10
CA1202100A (en) 1986-03-18
AU1292383A (en) 1983-10-06
EP0091018A1 (de) 1983-10-12
ATE20690T1 (de) 1986-07-15
JPH0610481B2 (ja) 1994-02-09
US4437385A (en) 1984-03-20
ZA832274B (en) 1984-11-28

Similar Documents

Publication Publication Date Title
ES8404021A1 (es) Disposicion para el control de un cilindro hidraulico de doble accion.
US4335867A (en) Pneumatic-hydraulic actuator system
EP0040075B1 (en) Hydraulic actuator
US5568759A (en) Hydraulic circuit having dual electrohydraulic control valves
GB1532607A (en) Fluid control system for multiple circuited work elements
ES535072A0 (es) Instalacion hidraulica con una bomba y una valvula de prioridad
GB1406326A (en) Hydraulic actuator controls disazo pigment
GB1457731A (en) Compensated multifunction hydraulic system
ATE23213T1 (de) Elektrohydraulische steuervorrichtung.
GB1440000A (en) Hydraulic control circuit
SE8106632L (sv) Hydrauliskt styrsystem
ES8605619A1 (es) Una disposicion de valvula de control, de presion de fluido,proporcional, para controlar una presion de fluido entre unafuente de suministro de presion de fluido variable y un su- midero
GB1214713A (en) Hydraulic fluid valve system
GR3000479T3 (en) A flow recovery system for hydraulic circuits with pumps and pressure compensated distributor valves for working members of earth-moving machines
ES8403201A1 (es) Un dispositivo de valvula de compensacion para limitar la diferencia de presion entre dos conducciones de control.
GB1349329A (en) Electrohydraulic control apparatus
SE7702722L (sv) Hydrauliskt styrsystem med variabel aterkoppling
CA2041614A1 (en) Control change system for a hydraulic working vehicle
EP0404946A4 (en) Hydraulic circuit device of construction vehicle
US3452779A (en) Fluidic interface valve and control system
JPS6469805A (en) Hydraulic control system
ES8402641A1 (es) "perfeccionamientos en los sistemas de regulacion hidraulicos".
EP0010117B1 (en) Improvements in or relating to pressure relief valve systems
GB887116A (en) Improvements in or relating to hydraulic servomotor systems
GB1514658A (en) Demand compensated hydraulic system with flow-sensitive device

Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19971201