EP1738077A1 - Fluid-working machine with displacement control - Google Patents
Fluid-working machine with displacement controlInfo
- Publication number
- EP1738077A1 EP1738077A1 EP05729670A EP05729670A EP1738077A1 EP 1738077 A1 EP1738077 A1 EP 1738077A1 EP 05729670 A EP05729670 A EP 05729670A EP 05729670 A EP05729670 A EP 05729670A EP 1738077 A1 EP1738077 A1 EP 1738077A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fluid
- chamber
- working
- machine
- controller
- 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.)
- Granted
Links
- 238000006073 displacement reaction Methods 0.000 title claims description 11
- 239000012530 fluid Substances 0.000 claims abstract description 20
- 230000008602 contraction Effects 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims 1
- 230000001360 synchronised effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
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.
- 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.
- 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.
- valve 1 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.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB0407297.1A GB0407297D0 (en) | 2004-03-31 | 2004-03-31 | Fluid working machine with displacement control |
PCT/GB2005/001235 WO2005095800A1 (en) | 2004-03-31 | 2005-03-31 | Fluid-working machine with displacement control |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1738077A1 true EP1738077A1 (en) | 2007-01-03 |
EP1738077B1 EP1738077B1 (en) | 2010-05-05 |
Family
ID=32247599
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05729670A Not-in-force EP1738077B1 (en) | 2004-03-31 | 2005-03-31 | Fluid-working machine with displacement control |
Country Status (8)
Country | Link |
---|---|
US (1) | US20070258832A1 (en) |
EP (1) | EP1738077B1 (en) |
JP (1) | JP2007530865A (en) |
CN (1) | CN100587269C (en) |
AT (1) | ATE467049T1 (en) |
DE (1) | DE602005021087D1 (en) |
GB (1) | GB0407297D0 (en) |
WO (1) | WO2005095800A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009153605A1 (en) * | 2008-06-20 | 2009-12-23 | Artemis Intelligent Power Limited | Fluid working machines and methods |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7402027B2 (en) | 2004-02-11 | 2008-07-22 | Haldex Hydraulics Corporation | Rotating group of a hydraulic machine |
US7380490B2 (en) | 2004-02-11 | 2008-06-03 | Haldex Hydraulics Corporation | Housing for rotary hydraulic machines |
US7364409B2 (en) | 2004-02-11 | 2008-04-29 | Haldex Hydraulics Corporation | Piston assembly for rotary hydraulic machines |
US7086225B2 (en) | 2004-02-11 | 2006-08-08 | Haldex Hydraulics Corporation | Control valve supply for rotary hydraulic machine |
WO2006055978A1 (en) | 2004-11-22 | 2006-05-26 | Bosch Rexroth Corporation | Hydro-electric hybrid drive system for motor vehicle |
WO2006060638A2 (en) | 2004-12-01 | 2006-06-08 | Haldex Hydraulics Corporation | Hydraulic drive system |
DE102007016517A1 (en) | 2007-04-05 | 2008-10-09 | Muller, Katherina | Hydrostatic transmission for e.g. tractor, has mechanical torque/rotary speed converter i.e. planetary gear, connected with output shaft, where mechanical torque change is simultaneously balanced by inverse torque change on shaft |
DE112008002963A5 (en) * | 2007-11-09 | 2010-09-02 | Muller, Katherina | Hydraulic pressure transformer and method of operation |
WO2010115019A1 (en) | 2009-04-02 | 2010-10-07 | Husco International, Inc. | Fluid working machine with cylinders coupled to split exterior ports by electrohydraulic valves |
NO2239463T3 (en) * | 2009-04-07 | 2018-03-10 | ||
EP2322802B1 (en) * | 2009-11-13 | 2014-01-08 | Artemis Intelligent Power Limited | Electronically controlled valve |
JP5576929B2 (en) * | 2010-02-23 | 2014-08-20 | アルテミス インテリジェント パワー リミティド | Fluid actuator and method of operating fluid actuator |
GB2477997B (en) * | 2010-02-23 | 2015-01-14 | Artemis Intelligent Power Ltd | Fluid working machine and method for operating fluid working machine |
EP2775144B1 (en) * | 2010-02-23 | 2018-09-26 | 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 |
GB201012743D0 (en) * | 2010-07-29 | 2010-09-15 | Isentropic Ltd | Valves |
DE102010046217A1 (en) * | 2010-09-21 | 2012-03-22 | Robert Bosch Gmbh | Pressure control with DDU / DVR units using engine cycles |
US8936135B2 (en) * | 2010-11-29 | 2015-01-20 | Lincoln Industrial Corporation | Pump having heated reservoir |
US9574582B2 (en) | 2012-04-23 | 2017-02-21 | Fluid Ride, Ltd. | Hydraulic pump system and method of operation |
EP2851585B1 (en) * | 2013-09-18 | 2016-04-13 | Artemis Intelligent Power Limited | Hydraulic transmission and method of controlling hydraulic transmission |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1774662A (en) * | 1928-04-12 | 1930-09-02 | Arthur S Parks | Vacuum pump |
BE758118A (en) * | 1969-11-07 | 1971-04-01 | Riva Calzoni Spa | DISTRIBUTOR FOR HYDRAULIC MOTORS WITH RADIANT PISTONS AND OTHER SIMILAR MOTORS |
JPS6341586Y2 (en) * | 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 |
GB8822901D0 (en) * | 1988-09-29 | 1988-11-02 | Mactaggart Scot Holdings Ltd | Apparatus & method for controlling actuation of multi-piston pump &c |
JP2684804B2 (en) * | 1990-01-19 | 1997-12-03 | 日産自動車株式会社 | Control device for positive displacement pump |
JP2979904B2 (en) * | 1993-06-29 | 1999-11-22 | 日産自動車株式会社 | Flow control device for positive displacement hydraulic pump |
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 |
US5564905A (en) * | 1994-10-18 | 1996-10-15 | Caterpillar Inc. | Displacement control for a variable displacement axial piston pump |
JPH08303325A (en) * | 1995-05-01 | 1996-11-19 | Aisan Ind Co Ltd | Control method of flow control valve for high pressure fuel pump |
WO1999061796A1 (en) * | 1998-05-26 | 1999-12-02 | Caterpillar Inc. | Hydraulic system having a variable delivery pump |
JP3374770B2 (en) * | 1998-11-18 | 2003-02-10 | トヨタ自動車株式会社 | Control device for variable discharge rate pump |
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 |
-
2004
- 2004-03-31 GB GBGB0407297.1A patent/GB0407297D0/en not_active Ceased
-
2005
- 2005-03-31 JP JP2007505631A patent/JP2007530865A/en active Pending
- 2005-03-31 DE DE602005021087T patent/DE602005021087D1/de active Active
- 2005-03-31 AT AT05729670T patent/ATE467049T1/en not_active IP Right Cessation
- 2005-03-31 CN CN200580014182A patent/CN100587269C/en not_active Expired - Fee Related
- 2005-03-31 EP EP05729670A patent/EP1738077B1/en not_active Not-in-force
- 2005-03-31 WO PCT/GB2005/001235 patent/WO2005095800A1/en active Application Filing
- 2005-03-31 US US10/599,475 patent/US20070258832A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO2005095800A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009153605A1 (en) * | 2008-06-20 | 2009-12-23 | Artemis Intelligent Power Limited | Fluid working machines and methods |
Also Published As
Publication number | Publication date |
---|---|
CN1973133A (en) | 2007-05-30 |
JP2007530865A (en) | 2007-11-01 |
DE602005021087D1 (en) | 2010-06-17 |
EP1738077B1 (en) | 2010-05-05 |
US20070258832A1 (en) | 2007-11-08 |
WO2005095800A1 (en) | 2005-10-13 |
GB0407297D0 (en) | 2004-05-05 |
ATE467049T1 (en) | 2010-05-15 |
CN100587269C (en) | 2010-02-03 |
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