AU5789773A - Open center control of variable pumps - Google Patents

Open center control of variable pumps

Info

Publication number
AU5789773A
AU5789773A AU57897/73A AU5789773A AU5789773A AU 5789773 A AU5789773 A AU 5789773A AU 57897/73 A AU57897/73 A AU 57897/73A AU 5789773 A AU5789773 A AU 5789773A AU 5789773 A AU5789773 A AU 5789773A
Authority
AU
Australia
Prior art keywords
center control
open center
variable pumps
pumps
variable
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
AU57897/73A
Other languages
English (en)
Inventor
WENDELL E. MILLERAND KENNETH G. McMILLEN RAYMONDE. JOHNSON
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.)
Borg Warner Corp
Original Assignee
KENNETH G MCMILLEN
RAYMOND E JOHNSON
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 KENNETH G MCMILLEN, RAYMOND E JOHNSON filed Critical KENNETH G MCMILLEN
Publication of AU5789773A publication Critical patent/AU5789773A/en
Expired 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
    • 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
    • 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
    • F15B2211/27—Directional control by means of the pressure source
    • 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
    • F15B2211/31—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
    • F15B2211/60—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
    • 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
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/88—Control measures for saving energy

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
AU57897/73A 1972-07-13 1973-07-09 Open center control of variable pumps Expired AU5789773A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US27130372A 1972-07-13 1972-07-13
USUS271,303 1972-07-13

Publications (1)

Publication Number Publication Date
AU5789773A true AU5789773A (en) 1975-01-09

Family

ID=23035011

Family Applications (1)

Application Number Title Priority Date Filing Date
AU57897/73A Expired AU5789773A (en) 1972-07-13 1973-07-09 Open center control of variable pumps

Country Status (11)

Country Link
US (1) US3788077A (pt)
JP (1) JPS4957275A (pt)
AU (1) AU5789773A (pt)
BE (1) BE802105A (pt)
BR (1) BR7305249D0 (pt)
CA (1) CA988812A (pt)
DE (1) DE2335703A1 (pt)
FR (1) FR2193153B1 (pt)
IT (1) IT991259B (pt)
NL (1) NL7309725A (pt)
ZA (1) ZA734473B (pt)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4178962A (en) * 1972-10-30 1979-12-18 Tomco, Inc. Control valve with flow control means
JPS5133201U (pt) * 1974-09-03 1976-03-11
US4197705A (en) * 1978-05-30 1980-04-15 General Signal Corporation Hydraulic control system
JPS636474Y2 (pt) * 1980-07-28 1988-02-23
US4408453A (en) * 1981-01-16 1983-10-11 General Signal Corporation Hydraulic control system
DE3109045A1 (de) * 1981-03-10 1982-09-16 Alfred Teves Gmbh, 6000 Frankfurt Regelbare hydraulikpumpe
JPH0735783B2 (ja) * 1986-02-17 1995-04-19 川崎重工業株式会社 可変容量形ポンプの流量制御回路
JPH0643523Y2 (ja) * 1987-10-14 1994-11-14 カヤバ工業株式会社 建設機械用制御弁
JPH074321Y2 (ja) * 1988-02-05 1995-02-01 日立建機株式会社 アクチュエータ駆動回路
US5265422A (en) * 1992-05-15 1993-11-30 Sauer Inc. Pilot-operated pressure override valve
FR2693241B1 (fr) * 1992-07-03 1994-09-30 Rexroth Sigma Circuit hydraulique de commande en pression d'un distributeur hydraulique du type à centre ouvert.
FR2827952A1 (fr) * 2001-07-27 2003-01-31 Osmos Sa Dispositif de mesure d'un deplacement et procede associe
US20060242955A1 (en) * 2005-04-19 2006-11-02 Clark Equipment Company Hydraulic system with piston pump and open center valve
US9347200B2 (en) 2012-06-04 2016-05-24 Cnh Industrial America Llc Fluid control system for work vehicle
JP5758348B2 (ja) * 2012-06-15 2015-08-05 住友建機株式会社 建設機械の油圧回路
US9334629B2 (en) 2013-03-15 2016-05-10 Deere And Company Open-center hydraulic system with machine information-based flow control

Family Cites Families (6)

* Cited by examiner, † Cited by third party
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
US3250227A (en) * 1963-08-09 1966-05-10 American Brake Shoe Co Torque control apparatus for hydraulic power units
GB1126873A (en) * 1964-09-22 1968-09-11 Sperry Rand Corp Improvements in hydraulic supply and control systems
US3366064A (en) * 1965-03-10 1968-01-30 Borg Warner Control for hydraulic apparatus
US3444689A (en) * 1967-02-02 1969-05-20 Weatherhead Co Differential pressure compensator control
GB1262488A (en) * 1968-06-04 1972-02-02 Dowty Technical Dev Ltd Hydraulic apparatus for including variable-delivery pumps

Also Published As

Publication number Publication date
NL7309725A (pt) 1974-01-15
ZA734473B (en) 1975-01-29
BR7305249D0 (pt) 1974-08-15
CA988812A (en) 1976-05-11
IT991259B (it) 1975-07-30
FR2193153A1 (pt) 1974-02-15
JPS4957275A (pt) 1974-06-04
BE802105A (fr) 1973-11-05
FR2193153B1 (pt) 1976-06-18
DE2335703A1 (de) 1974-01-24
US3788077A (en) 1974-01-29

Similar Documents

Publication Publication Date Title
CA973096A (en) Variable vanes
CA980382A (en) Control pendants
CA988812A (en) Open center control of variable pumps
CA970653A (en) Control valve
CA979675A (en) Control of erosion
AU474324B2 (en) The control of fungi
CA985124A (en) Control valve
CA984263A (en) Control valve
CA980216A (en) Electrolic control valve
CA985127A (en) Control valve
CA985126A (en) Control valve
CA978049A (en) Control valve
AU464991B2 (en) Variabole resistaance control
AU474093B2 (en) Chemosterilization of ixodides
CA953608A (en) Control valve
CA985125A (en) Control valve
CA984262A (en) Control valve
CA954008A (en) Control valve
CA999856A (en) Control of polymer degradation rate
CA970447A (en) Variable coil
CA899199A (en) Pump control
CA1006440A (en) Variable vanes
CA893530A (en) Variable vanes
CA903741A (en) Graphite variable control valve
CA910449A (en) Variable resistor of sliding type