ZA734473B - Open center control of variable pumps - Google Patents

Open center control of variable pumps

Info

Publication number
ZA734473B
ZA734473B ZA00734473A ZA734473A ZA734473B ZA 734473 B ZA734473 B ZA 734473B ZA 00734473 A ZA00734473 A ZA 00734473A ZA 734473 A ZA734473 A ZA 734473A ZA 734473 B ZA734473 B ZA 734473B
Authority
ZA
South Africa
Prior art keywords
center control
open center
variable pumps
pumps
variable
Prior art date
Application number
ZA00734473A
Inventor
W Miller
K Mcmillen
R Johnson
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
Publication of ZA734473B publication Critical patent/ZA734473B/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
    • F15B11/02—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)
ZA00734473A 1972-07-13 1973-07-03 Open center control of variable pumps ZA734473B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US27130372A 1972-07-13 1972-07-13

Publications (1)

Publication Number Publication Date
ZA734473B true ZA734473B (en) 1975-01-29

Family

ID=23035011

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA00734473A ZA734473B (en) 1972-07-13 1973-07-03 Open center control of variable pumps

Country Status (11)

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

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 (en) * 1974-09-03 1976-03-11
US4197705A (en) * 1978-05-30 1980-04-15 General Signal Corporation Hydraulic control system
JPS636474Y2 (en) * 1980-07-28 1988-02-23
US4408453A (en) * 1981-01-16 1983-10-11 General Signal Corporation Hydraulic control system
DE3109045A1 (en) * 1981-03-10 1982-09-16 Alfred Teves Gmbh, 6000 Frankfurt ADJUSTABLE HYDRAULIC PUMP
JPH0735783B2 (en) * 1986-02-17 1995-04-19 川崎重工業株式会社 Flow control circuit for variable displacement pump
JPH0643523Y2 (en) * 1987-10-14 1994-11-14 カヤバ工業株式会社 Control valve for construction machinery
JPH074321Y2 (en) * 1988-02-05 1995-02-01 日立建機株式会社 Actuator drive circuit
US5265422A (en) * 1992-05-15 1993-11-30 Sauer Inc. Pilot-operated pressure override valve
FR2693241B1 (en) * 1992-07-03 1994-09-30 Rexroth Sigma Hydraulic circuit for pressure control of a hydraulic distributor of the open center type.
FR2827952A1 (en) * 2001-07-27 2003-01-31 Osmos Sa Movement sensor for geophysics links large movement mechanically to small sensor
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 (en) * 2012-06-15 2015-08-05 住友建機株式会社 Hydraulic circuit for construction machinery
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
FR2193153B1 (en) 1976-06-18
JPS4957275A (en) 1974-06-04
BE802105A (en) 1973-11-05
NL7309725A (en) 1974-01-15
DE2335703A1 (en) 1974-01-24
CA988812A (en) 1976-05-11
IT991259B (en) 1975-07-30
US3788077A (en) 1974-01-29
BR7305249D0 (en) 1974-08-15
AU5789773A (en) 1975-01-09
FR2193153A1 (en) 1974-02-15

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