US20070258832A1 - Fluid-Working Machine with Displacement Control - Google Patents

Fluid-Working Machine with Displacement Control Download PDF

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Publication number
US20070258832A1
US20070258832A1 US10/599,475 US59947505A US2007258832A1 US 20070258832 A1 US20070258832 A1 US 20070258832A1 US 59947505 A US59947505 A US 59947505A US 2007258832 A1 US2007258832 A1 US 2007258832A1
Authority
US
United States
Prior art keywords
fluid
chamber
working
controller
machine
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.)
Abandoned
Application number
US10/599,475
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English (en)
Inventor
Niall Caldwell
William Hugh Rampen
Uwe Stein
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.)
Artemis Intelligent Power Ltd
Original Assignee
Artemis Intelligent Power Ltd
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 Artemis Intelligent Power Ltd filed Critical Artemis Intelligent Power Ltd
Assigned to ARTEMIS INTELLIGENT POWER LIMITED reassignment ARTEMIS INTELLIGENT POWER LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CALDWELL, NIALL JAMES, RAMPEN, WILLIAM H.S., STEIN, UWE B.P.
Publication of US20070258832A1 publication Critical patent/US20070258832A1/en
Abandoned legal-status Critical Current

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Classifications

    • 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
    • F04B49/065—Control using electricity and making use of computers

Definitions

  • This invention relates to a fluid-working machine.
  • the time-averaged flow of fluid is variable in all four quadrants of motion.
  • the invention is applicable to any machine with working chambers, which alternately expand and contract, whether by pistons and cylinders, vanes, lobes or gears and where the primary method of commutating fluid to the working chambers is by a rotating port plate, synchronised to the phase of the chamber expansion and contraction cycle, which alternately connects high and then low pressure fluid manifolds to each working chamber.
  • the invention provides a fluid-working machine according to claim 1 .
  • the insertion of a valve into the fluid connection between the commutating means and each of the working chambers allows each working chamber to be isolated from the commutating means. Chambers which are isolated in this way by the valve operate in an idle condition, whereby no useful fluid work is done by the chamber, and thus the displacement per revolution of the machine is reduced.
  • such valves may be controlled mechanically, allowing the machine to be used in a reduced displacement mode when it is desired, for instance, to operate at high speed.
  • Such mechanical control may be automatic, for instance reducing the displacement of the machine as the speed of rotation increases above a threshold.
  • valves are individually controlled by an electronic signal, allowing each of the chambers to be isolated according to the command of an electronic controller.
  • an electronic controller has an input signal of the position of the shaft of the machine, allowing the timing of the valve actuation to be phased relative to the position of the shaft, allowing each chamber to be isolated from the commutator on a stroke-by-stroke basis.
  • FIGURE is a schematic section of a machine according to the invention.
  • the drawing shows a machine comprising a working chamber 4 in the form of cylinder containing a piston actuating a crankshaft 5 .
  • a conventional commutator plate 2 alternately connects the chamber 4 to port A or, via a toroidal cavity 10 , to port B, one of the ports being a high-pressure port and the other a low-pressure port.
  • the machine operates as a motor with fluid being supplied at high pressure at port A and exhausted at low pressure at port B, but both the pressures and the direction of flow could be reversed separately without changing the apparatus shown.
  • an actively controllable on-off valve 1 By placing an actively controllable on-off valve 1 , in series with a rotating commutator plate 2 , into the fluid passage 3 between the commutator plate and the working chamber 4 , the flow into the working chamber can be controlled.
  • the expansion stroke of the working chamber will occur in a partial vacuum. If the fluid is a liquid such as oil, a bubble is formed as air is drawn out of the liquid. The return stroke will collapse the bubble by the time the chamber returns to its minimum volume. In doing so the working volume will have exchanged no work with the fluid system while absorbing very little parasitic work.
  • the working chamber When the valve 1 is left in the open position the working chamber functions, as normal, to produce a working cycle.
  • the time averaged flow is varied by deciding on a chamber-by-chamber basis whether to effect idle or working cycles. The decisions are taken as each successive chamber nears the minimum volume condition, irrespective of whether the machine is working as a pump or a motor.
  • An electronic controller 6 senses the phase of the working chamber cycle using a once-per-revolution shaft sensor 7 , an encoder, a resolver or some similar means. At times coinciding with the minimum working chamber volume the controller can either leave the on-off valve in its de-energised open state or pull it closed through electromagnetic means.
  • the controller reads the system demand, either through an analogue or digital input line or a bus 8 , and decides whether the working chamber reaching the minimum volume condition should be left working or idled by closing the valve 1 .
  • the on-off valve 1 defaults to the open position and is pulsed to close, but it is possible to see that the opposite operating mode, i.e. default closed, pulse to open would also have application where a power-off freewheel characteristic was required.
  • the controller decisions can also be made entirely on the basis of shaft speed in order to limit the rate of increase of shaft power.
  • the electronic controller would require no external demand signal and would make the sequential on-off valve actuation decisions on the basis of a pre-programmed flow versus speed function.
  • the decision sequence can be determined in order to limit individual wheel slip, to create a skid steering effect or to create graded changes in torque and thus controlled vehicle accelerations.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Hydraulic Motors (AREA)
  • Lifting Devices For Agricultural Implements (AREA)
  • Servomotors (AREA)
  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
US10/599,475 2004-03-31 2005-03-31 Fluid-Working Machine with Displacement Control Abandoned US20070258832A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB0407297.1A GB0407297D0 (en) 2004-03-31 2004-03-31 Fluid working machine with displacement control
GB0407297.1 2004-03-31
PCT/GB2005/001235 WO2005095800A1 (en) 2004-03-31 2005-03-31 Fluid-working machine with displacement control

Publications (1)

Publication Number Publication Date
US20070258832A1 true US20070258832A1 (en) 2007-11-08

Family

ID=32247599

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/599,475 Abandoned US20070258832A1 (en) 2004-03-31 2005-03-31 Fluid-Working Machine with Displacement Control

Country Status (8)

Country Link
US (1) US20070258832A1 (enExample)
EP (1) EP1738077B1 (enExample)
JP (1) JP2007530865A (enExample)
CN (1) CN100587269C (enExample)
AT (1) ATE467049T1 (enExample)
DE (1) DE602005021087D1 (enExample)
GB (1) GB0407297D0 (enExample)
WO (1) WO2005095800A1 (enExample)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110226342A1 (en) * 2008-06-20 2011-09-22 Artemis Intelligent Power Limited Fluid working machines and methods
US20120057991A1 (en) * 2010-02-23 2012-03-08 Artemis Intelligent Power Limited Fluid-working machine and method of operating a fluid-working machine
US20120063919A1 (en) * 2010-02-23 2012-03-15 Artemis Intelligent Power Limited Fluid-working machine valve timing
US8534687B2 (en) 2010-07-05 2013-09-17 Fluid Ride Ltd. Suspension strut for a vehicle
US20140147293A1 (en) * 2010-09-21 2014-05-29 Robert Bosch Gmbh Hydraulic machine with electronically controlled valves
US8869521B2 (en) 2009-04-02 2014-10-28 Husco International, Inc. Fluid working machine with cylinders coupled to split exterior ports by electrohydraulic valves
EP2851585A1 (en) * 2013-09-18 2015-03-25 Artemis Intelligent Power Limited Hydraulic transmission and method of controlling hydraulic transmission
US9091254B2 (en) 2009-04-07 2015-07-28 Artemis Intelligent Power Limited Fluid working machine and method of operating a fluid working machine
US9574582B2 (en) 2012-04-23 2017-02-21 Fluid Ride, Ltd. Hydraulic pump system and method of operation
US9739266B2 (en) 2010-02-23 2017-08-22 Artemis Intelligent Power Limited Fluid-working machine and method of operating a fluid-working machine
US12454945B2 (en) 2022-05-03 2025-10-28 Regents Of The University Of Minnesota Partial stroke fluidic pump-motor with high mechanical efficiency

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7364409B2 (en) 2004-02-11 2008-04-29 Haldex Hydraulics Corporation Piston assembly for rotary hydraulic machines
US7380490B2 (en) 2004-02-11 2008-06-03 Haldex Hydraulics Corporation Housing for rotary hydraulic machines
US7086225B2 (en) 2004-02-11 2006-08-08 Haldex Hydraulics Corporation Control valve supply for rotary hydraulic machine
US7402027B2 (en) 2004-02-11 2008-07-22 Haldex Hydraulics Corporation Rotating group of a hydraulic machine
EP1824699B1 (en) 2004-11-22 2010-10-06 Bosch Rexroth Corporation Hydro-electric hybrid drive system for motor vehicle
CA2588290A1 (en) 2004-12-01 2006-06-08 Haldex Hydraulics Corporation Hydraulic drive system
DE102007016517A1 (de) 2007-04-05 2008-10-09 Muller, Katherina Hydrostatischer Fahrantrieb
DE112008002963A5 (de) * 2007-11-09 2010-09-02 Muller, Katherina Hydraulischer Drucktransformator und Verfahren zu dessen Betrieb
EP2322802B1 (en) * 2009-11-13 2014-01-08 Artemis Intelligent Power Limited Electronically controlled valve
GB201012743D0 (en) 2010-07-29 2010-09-15 Isentropic Ltd Valves
US8936135B2 (en) * 2010-11-29 2015-01-20 Lincoln Industrial Corporation Pump having heated reservoir

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1774662A (en) * 1928-04-12 1930-09-02 Arthur S Parks Vacuum pump
US3696710A (en) * 1969-11-07 1972-10-10 Riva Calzoni Spa Distributor for hydraulic motors
US5259738A (en) * 1988-09-29 1993-11-09 University Of Edinburgh Fluid-working machine
US5456581A (en) * 1994-08-12 1995-10-10 The United States Of America As Represented By The Secretary Of The Navy Control system for a multi-piston pump with solenoid valves for the production of constant outlet pressure flow

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6341586Y2 (enExample) * 1978-09-29 1988-11-01
JPS55137374A (en) * 1979-04-13 1980-10-27 Kawasaki Heavy Ind Ltd Radial piston motor with valve plate type distributor
JP2684804B2 (ja) * 1990-01-19 1997-12-03 日産自動車株式会社 容積ポンプの制御装置
JP2979904B2 (ja) * 1993-06-29 1999-11-22 日産自動車株式会社 容積型液圧ポンプの流量制御装置
US5564905A (en) * 1994-10-18 1996-10-15 Caterpillar Inc. Displacement control for a variable displacement axial piston pump
JPH08303325A (ja) * 1995-05-01 1996-11-19 Aisan Ind Co Ltd 高圧燃料ポンプ用流量制御弁の制御方法
DE69919658T2 (de) * 1998-05-26 2005-09-15 Caterpillar Inc., Peoria Hydrauliksystem mit einer pumpe mit variabler fördermenge
JP3374770B2 (ja) * 1998-11-18 2003-02-10 トヨタ自動車株式会社 吐出量可変式ポンプの制御装置
US6176684B1 (en) * 1998-11-30 2001-01-23 Caterpillar Inc. Variable displacement hydraulic piston unit with electrically operated variable displacement control and timing control
US6681571B2 (en) * 2001-12-13 2004-01-27 Caterpillar Inc Digital controlled fluid translating device
DE10216951A1 (de) * 2002-04-17 2003-11-06 Bosch Rexroth Ag Hydrotransformator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1774662A (en) * 1928-04-12 1930-09-02 Arthur S Parks Vacuum pump
US3696710A (en) * 1969-11-07 1972-10-10 Riva Calzoni Spa Distributor for hydraulic motors
US5259738A (en) * 1988-09-29 1993-11-09 University Of Edinburgh Fluid-working machine
US5456581A (en) * 1994-08-12 1995-10-10 The United States Of America As Represented By The Secretary Of The Navy Control system for a multi-piston pump with solenoid valves for the production of constant outlet pressure flow

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110226342A1 (en) * 2008-06-20 2011-09-22 Artemis Intelligent Power Limited Fluid working machines and methods
US9091253B2 (en) * 2008-06-20 2015-07-28 Artemis Intelligent Power Limited Fluid working machines and methods
US8869521B2 (en) 2009-04-02 2014-10-28 Husco International, Inc. Fluid working machine with cylinders coupled to split exterior ports by electrohydraulic valves
US9091254B2 (en) 2009-04-07 2015-07-28 Artemis Intelligent Power Limited Fluid working machine and method of operating a fluid working machine
US9133839B2 (en) * 2010-02-23 2015-09-15 Artemis Intelligent Power Limited Fluid-working machine and method of detecting a fault
US20120076670A1 (en) * 2010-02-23 2012-03-29 Artemis Intelligent Power Limited Fluid-working machine and method of operating a fluid-working machine
US9010104B2 (en) * 2010-02-23 2015-04-21 Artemis Intelligent Power Limited Fluid-working machine valve timing
US20120063919A1 (en) * 2010-02-23 2012-03-15 Artemis Intelligent Power Limited Fluid-working machine valve timing
US20120057991A1 (en) * 2010-02-23 2012-03-08 Artemis Intelligent Power Limited Fluid-working machine and method of operating a fluid-working machine
US20150211513A1 (en) * 2010-02-23 2015-07-30 Artemis Intelligent Power Limited Fluid-working machine valve timing
US9739266B2 (en) 2010-02-23 2017-08-22 Artemis Intelligent Power Limited Fluid-working machine and method of operating a fluid-working machine
US9133838B2 (en) * 2010-02-23 2015-09-15 Artemis Intelligent Power Limited Fluid-working machine and method of operating a fluid-working machine
US9797393B2 (en) * 2010-02-23 2017-10-24 Artemis Intelligent Power Limited Fluid-working machine valve timing
US8534687B2 (en) 2010-07-05 2013-09-17 Fluid Ride Ltd. Suspension strut for a vehicle
US10125841B2 (en) 2010-07-05 2018-11-13 Fluid Ride, Ltd. Suspension strut for a vehicle
US9150076B2 (en) 2010-07-05 2015-10-06 Fluid Ride, Ltd. Suspension strut for a vehicle
US20140147293A1 (en) * 2010-09-21 2014-05-29 Robert Bosch Gmbh Hydraulic machine with electronically controlled valves
US9574582B2 (en) 2012-04-23 2017-02-21 Fluid Ride, Ltd. Hydraulic pump system and method of operation
EP2851585A1 (en) * 2013-09-18 2015-03-25 Artemis Intelligent Power Limited Hydraulic transmission and method of controlling hydraulic transmission
US12454945B2 (en) 2022-05-03 2025-10-28 Regents Of The University Of Minnesota Partial stroke fluidic pump-motor with high mechanical efficiency

Also Published As

Publication number Publication date
CN100587269C (zh) 2010-02-03
DE602005021087D1 (enExample) 2010-06-17
EP1738077B1 (en) 2010-05-05
JP2007530865A (ja) 2007-11-01
ATE467049T1 (de) 2010-05-15
WO2005095800A1 (en) 2005-10-13
EP1738077A1 (en) 2007-01-03
CN1973133A (zh) 2007-05-30
GB0407297D0 (en) 2004-05-05

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Legal Events

Date Code Title Description
AS Assignment

Owner name: ARTEMIS INTELLIGENT POWER LIMITED, UNITED KINGDOM

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CALDWELL, NIALL JAMES;RAMPEN, WILLIAM H.S.;STEIN, UWE B.P.;REEL/FRAME:019106/0231

Effective date: 20060929

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION