GB1386472A - Regulated pump system - Google Patents

Regulated pump system

Info

Publication number
GB1386472A
GB1386472A GB1865272A GB1865272A GB1386472A GB 1386472 A GB1386472 A GB 1386472A GB 1865272 A GB1865272 A GB 1865272A GB 1865272 A GB1865272 A GB 1865272A GB 1386472 A GB1386472 A GB 1386472A
Authority
GB
United Kingdom
Prior art keywords
signal
pump
amplifier
line
pressure
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
GB1865272A
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of GB1386472A publication Critical patent/GB1386472A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/46—Automatic regulation in accordance with output requirements
    • F16H61/475—Automatic regulation in accordance with output requirements for achieving a target power, e.g. input power or output power
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/08—Regulating by delivery pressure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/206—Flow affected by fluid contact, energy field or coanda effect [e.g., pure fluid device or system]
    • Y10T137/2065—Responsive to condition external of system
    • Y10T137/2071—And causing change or correction of sensed condition

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Control Of Fluid Gearings (AREA)
  • Reciprocating Pumps (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

1386472 Hydrostatic transmission control ROBERT BOSCH GmbH 21 April 1972 [22 April 1971] 18652/72 Addition to 1376829 Headings F2D and F2W [Also in Division GW3] In a hydrostatic transmission 11, 27 (Fig. 2) driving a hoist 28, the displacement of pump 11 is controlled by a servovalve 15 responsive to the output of an amplifier 13 receiving a control signal A and a displacement feedback signal from transducer 12. Signal A is transmitted through a limiter 17 receiving a demandlimiting signal B from amplifier 23 which receives a signal from amplifier 20 whenever a power output (P x Q, i.e. output pressure x flow rate) signal or computed at 18 exceeds set point signal C. The amplifier 23 also receives a signal E from unit 24 whenever the pump exceeds a given discharge pressure D during those periods when the pump is operating in either of the pumping quadrants of its P x Q characteristic. When the pump is operating in either of the motoring quadrants, i.e. when it is being driven by motor 27, unit E supplies instead a signal E<1> to a limiter 14 to limit the rate of pump adjustment. Unit 24 (Fig. 2) includes a selector 28 which admits the higher line pressure in the transmission to amplifier 33 which, when the pressure exceeds set point D, provides a signal on line F to spool 37 which transmits it to 39 or 40 according whether line 29 or 30 is at the higher pressure. Spool 38 transmits the signal F to 41 or 42 according to whether a signal on G from the displacement control loop is positive or negative. Signal F will thus appear on line 41 when the pump is pumping and on line 42 when the pump is motoring. Signals A, C, D may derive from electro-fluidic converters 16, 21, 25 respectively.
GB1865272A 1971-04-22 1972-04-21 Regulated pump system Expired GB1386472A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712119647 DE2119647A1 (en) 1971-04-22 1971-04-22 Control device for a hydraulic pump

Publications (1)

Publication Number Publication Date
GB1386472A true GB1386472A (en) 1975-03-05

Family

ID=5805550

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1865272A Expired GB1386472A (en) 1971-04-22 1972-04-21 Regulated pump system

Country Status (6)

Country Link
US (1) US3750534A (en)
CH (1) CH535455A (en)
DE (1) DE2119647A1 (en)
FR (1) FR2136563A6 (en)
GB (1) GB1386472A (en)
IT (1) IT1006535B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4091617A (en) * 1977-05-11 1978-05-30 Eaton Corporation Hydraulic controller
IT1114651B (en) * 1977-05-31 1986-01-27 Eaton Corp HYDRAULIC CONTROL DEVICE
DE3044515A1 (en) * 1980-11-26 1982-06-03 bso Steuerungstechnik GmbH, 6603 Sulzbach ADJUSTMENT DEVICE FOR HYDRAULIC PUMP WITH ADJUSTABLE FLOW RATE
EP0105523B1 (en) * 1982-10-05 1988-01-13 Hitachi Construction Machinery Co., Ltd. Automatic neutral point detecting system for hydraulic pump
EP0114646B1 (en) * 1983-01-19 1988-09-07 Hitachi Construction Machinery Co., Ltd. Failure detection system for hydraulic pump
EP0921309B1 (en) * 1997-12-02 2003-03-19 Poclain Hydraulics Industrie Hydraulic motor with switch valve
AU2005206866B2 (en) * 2004-01-14 2011-02-03 Ocean Power Technologies, Inc. Active impedance matching systems and methods for wave energy converter

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3478731A (en) * 1966-08-08 1969-11-18 Honeywell Inc Engine startup sequence control apparatus
US3647322A (en) * 1967-04-12 1972-03-07 Hans Molly Device for controlling quantities which are defined by the product of two measured variables
US3488948A (en) * 1968-04-29 1970-01-13 Gen Electric Gas turbine engine transient fuel control
GB1226447A (en) * 1968-07-13 1971-03-31
US3499599A (en) * 1968-07-25 1970-03-10 Westinghouse Air Brake Co Compressor governor having fluidic devices

Also Published As

Publication number Publication date
CH535455A (en) 1973-03-31
US3750534A (en) 1973-08-07
IT1006535B (en) 1976-10-20
FR2136563A6 (en) 1972-12-22
DE2119647A1 (en) 1972-11-02

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees