CN102939444A - Pressure equalization device for hydraulic systems - Google Patents
Pressure equalization device for hydraulic systems Download PDFInfo
- Publication number
- CN102939444A CN102939444A CN2011800285759A CN201180028575A CN102939444A CN 102939444 A CN102939444 A CN 102939444A CN 2011800285759 A CN2011800285759 A CN 2011800285759A CN 201180028575 A CN201180028575 A CN 201180028575A CN 102939444 A CN102939444 A CN 102939444A
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- China
- Prior art keywords
- gas
- pressure
- loaded
- liquid
- gas reservoir
- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1433—Pumps
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- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
The invention relates to a pressure equalization device (10) for at least one component (12) of a hydraulic system (14) to which liquid is supplied, comprising a supply device, which contains a pumping unit (16) and supply lines (18) for providing a liquid, wherein at least one component (12) supplied with liquid is connected to at least one gas accumulator (20), which is controlled by means of hydraulic system pressure. The claimed pressure equalization device can be used in particular in metering systems that conduct liquid auxiliary agents for exhaust gas after-treatment in internal combustion engines.
Description
Background technique
In internal-combustion engine, particularly compression ignition internal combustion engine, the Abgasgesetz according to being about to over the next several years implement among other things, must reduce the ratio of nitrogen oxide in tail gas.A kind of establishment method that reduces for the nitrogen oxide at exhausted gas post-processing system is based on selective catalytic reduction (SCR).In the SCR method, nitrogen oxide is by means of the function aid, particularly by means of being reduced into the nitrogen G﹠W for the medium that reduces harmful matter.Medium as being used for reducing harmful matter often uses a kind of moisture aqueous solution of urea, and this aqueous solution of urea is introduced air outlet flue from the dosage supply system.At this, the medium that is used for the minimizing harmful matter is carried dosage supplying module of arrival from a reservoir vessel through supply system in due form, and described medium for reducing harmful matter is injected into for example outlet pipe by described dosage supplying module.
Disclose in the prior art and be used for to send into the various device of exhaust for the medium that reduces harmful matter.Such as the described a kind of dosage supplier of for example patent publication us DE102008009650A1, it comprises the dosage supplying module of supplying with the medium that is used for the minimizing harmful matter for dosage, and is used for for being applied to reduce the medium of harmful matter to the supply system of described dosage supplying module.Supply system comprises one or more reservoir vessels, for example is used for holding the flow container of aqueous solution of urea, and the one or more supply pipelines that are connected with the dosage supplying module.In addition, be provided with a conveying assembly, to guarantee flowing to dosage supplying module from reservoir vessel through supply pipeline for the medium that reduces harmful matter.
Be known that in the hydraulic system, can cause the faster wearing and tearing of assembly and the assembly that causes thus to damage especially for the pressure surge in the dosage supply system of exhaust after-treatment.In running, this pressure surge both can be internally by the pressure pulsation in the hydraulic system, for example the heterogeneity of the feed flow by pump or the control by valve produce, also can externally produce, for example produce by the fluctuation of the load cycling in oil hydraulic cylinder or oil hydraulic motor.In addition, in the state of rest corresponding with the off-mode of system, congealable liquid, such as moisture aqueous solution of urea according to the antifreezing solution that adds from approximately-11 ℃ beginning to freeze.In the transition from the liquid phase to the solid phase, the volumetric expansion of the aqueous urea aqueous solution about 10% has appearred especially.This expansion behavior produces high pressure in freezing process, described high pressure can damage the dosage supply system loading the assembly of liquid.
Therefore, the main challenge in known dosage supply system is, protects each assembly, and for example the dosage supplying module avoids causing damage because of the pressure surge in the hydraulic system.Used the reliable antifreeze mechanism that in the running state of dosage supply system, acts on to the damping pressure pulsation and/or under static state be generation dosage supply system under the outage state for this reason.A kind of pressure damping of improvement is usually by being placed to damper, for example multihole device (as in DE102008013406A1) in the supply pipeline and realizing.Scheme well known in the prior art realizes reliably antifreeze by the assembly to be protected of emptying dosage supply system under static state.This dosage supply system after the shutdown also will on one limited period emptying by pressurized air or need the auxiliary energy of pressurized air or current forms by means of pump suction when (as disclosed among the DE102004054238A1 for example), in order to guarantee emptying or inhale empty and therefore produce reliably antifreeze.On some functions, for example on emergency stop function, this auxiliary energy no longer is supplied to and describedly can not be turned round for antifreeze mechanism, and energy supply interrupts when this emergency shutdown.
Patent publication us DE102008009650A1 has described a kind of dosage supply system, and it comprises the cut off with energy accumulator, and described energy accumulator fills energy at least in part in the running of dosage supply system.Cut off is set up, so that when there are fault in dosage supply system and/or the system that comprises this dosage supply system, particularly when the energy supply of dosage supply system lost efficacy, by the emptying dosage supplying module of at least part of anti-frozen ground of energy and/or the supply system that stores.In preferred form of implementation, this energy accumulator is configured to hydraulic storage.Therefore, itself needs to introduce the balance volume of additional most filling air in energy accumulator, and described balance volume can compensate the expansion of sucking liquid in refrigerating process.The balance volume of this filling air must be sealed shut by non-proliferation, with the transition in the liquid of the air avoiding comprising.Yet in most of known and durable elastomeric materials, the air that particularly comprises when high fluid pressure and low temperature can be transitioned in the liquid, and thus, this balance volume no longer can be realized the ice pressure balance.
Summary of the invention
In view of described prior art, the present invention based on purpose be, a kind of pressure equaliser of simplification is provided, and this pressure equaliser is not automatically to the needs of auxiliary energy or additional control unit, for example valve control device, temperature or pressure transducer and there is not the necessity ground of additional balance volume device to reduce pressure surge in hydraulic system.
According to the present invention, proposed a kind of be used to having supplier---comprise conveying assembly and supply pipeline, be used for providing liquid---at least one of hydraulic system be loaded the pressure equaliser of the assembly of liquid, described at least one assembly that is loaded liquid of wherein said hydraulic system is connected with at least one gas reservoir, and described gas reservoir is controlled by hydraulic system pressure.
This device can be used to dosage supply system exhaust after-treatment especially, and described dosage supply system is used for exhaust after-treatment and has the assembly that for example dosage supplying module conduct is loaded liquid.The gas reservoir that is connected with this assembly that is loaded liquid wherein uses as gas at favourable mode of execution Air according to hydraulic system pressure stored-gas volume.This hydraulic system pressure transfers to liquid the assembly of system through supply pipeline from for example reservoir vessel by conveying assembly under the running state (being on-state) of hydraulic system, and therefore by the assembly on-load pressure of liquid to hydraulic system.
In order to pass through hydraulic system pressure pilot pressure Equilibrator, at least one hydraulic connecting element produces connection between at least one supply pipeline of at least one gas reservoir and hydraulic system.In favourable mode of execution, this hydraulic connecting element can comprise at least one oil hydraulic cylinder, and described oil hydraulic cylinder has particularly face that is loaded liquid, and the described face that is loaded liquid for example can be configured to piston or film.Described at least one oil hydraulic cylinder is installed at least one branch of described at least one supply pipeline and is connected on before described at least one gas reservoir.
Gas reservoir comprises particularly face that is loaded gas, and the described face that is loaded gas can be configured to piston or film equally.The face of the be loaded liquid by for example oil hydraulic cylinder is connected rigidly with the face of the be loaded gas of gas reservoir, preferably realizes the combination on the function between described at least one gas reservoir and the described hydraulic system pressure.This can be implemented by a kind of device, and described device connects the face of the be loaded gas of gas reservoir with the face that is loaded liquid of oil hydraulic cylinder.This connection can be for example piston rod by the rigidity between the face that is loaded gas of the face that is loaded liquid of oil hydraulic cylinder and gas reservoir consist of.
Therefore variation on the hydraulic system pressure is passed to gas reservoir through connecting element.In addition, gas reservoir comprises first safety check, and described the first safety check produces or interrupts to the connection of gas source (such as the fresh air that for example comes from the outside).Through this first safety check, gas (such as for example air) input to gas reservoir occurs, and described gas reservoir stores a gas volume under the running state of hydraulic system when the oil hydraulic cylinder on-load pressure.
Therefore, a gas volume is introduced in the gas reservoir as the pressure damping volume during the running state of hydraulic system, in order to produce the pressure balance for the pressure pulsation that for example causes by vibration.The compression of gas volume in gas reservoir itself or gas volume are introduced to the part in the assembly that is loaded liquid and have been reduced this pressure pulsation in the hydraulic system pressure, and play the pressure damping effect under running state.
Under the state of rest of hydraulic system, when namely system had disconnected, hydraulic system pressure reduced.Reposition element in the gas reservoir allows to be loaded the face of gas by the return motion that deadweight or external force (for example spring or elastomeric external force) cause, so facilitates driving out of of the gas volume that is stored.Gas reservoir and described at least one be loaded at least one gas line and at least one second safety check be installed between the assembly of liquid.Gas volume and liquid separation that the second safety check is stored in gas reservoir under the running state of hydraulic system are opened, and be used for, when hydraulic system disconnects, gas volume be incorporated into from gas reservoir in the assembly that is loaded liquid that connects this gas reservoir.Therefore, the gas volume that can be stored in the gas reservoir is driven out of gas reservoir at least in part under the state of rest of hydraulic system, and is received in the assembly that is loaded liquid.This gas volume consist of in the assembly that is loaded liquid can compressed balance volume, and therefore when freezing, can play the protection of anti-ice pressure.
The invention advantage
Be in any time in running state or the state of rest in hydraulic system in this way according to pressure equaliser proposed by the invention and can be equilibrated at pressure surge at least one assembly that is loaded liquid.This has prevented the particularly damage and wear phenomenon on the assembly that is loaded liquid of hydraulic system (such as for example dosage supply system).
Be loaded autobalance that the pressure surge in the assembly of liquid realizes by at least one gas reservoir at least one and facilitated especially there is not other the mode damping pressure pulsation to the connection of control unit (such as for example valve control device, temperature transducer or pressure transducer), even and having external energy not guarantee the anti-ice Compressive Strength of hydraulic system when disconnecting in system with supplying with, delivery can be freezed medium in described hydraulic system.So can for example in the operated situation of emergency stop switch, particularly in hazardous materials transportation, there be electric energy ground protective system to avoid pressure of freezing wall.In addition, owing to using gas reservoir, needn't other device be set for producing its anti-ice Compressive Strength in pressure equaliser.Therefore, gas (for example air) automatically can be incorporated in the oil hydraulic circuit, not provide available electrical energy and do not need to add, in order to when freezing, hold the volumetric expansion that to freeze medium, and therefore protect assembly to avoid damaging by not allowing high ice to press.The scheme that proposes according to the present invention provides the simplification of design, and therefore provides higher steadiness when the part owing to some quantity of cancellation reduces cost.In addition, the pressure equaliser that proposes according to the present invention can be protected the wearing and tearing of avoiding assembly and the damage that therefore causes at least in part, and therefore prolongs its working life and can reduce service cost.
Description of drawings
The present invention is based on accompanying drawing is described in more detail hereinafter.
It illustrates
A kind of enforcement modification according to proposed by the invention pressure equaliser of Fig. 1 on dosage supply system example
The enforcement modification according to proposed by the invention pressure equaliser of Fig. 2 in schematic illustration
Embodiment
Embodiment according to pressure equaliser proposed by the invention 10 is illustrated among Fig. 1.For better understanding, schematically show the disclosed dosage supply system 15 of supplying with for the dosage of liquid functional aid (especially for the medium that reduces harmful matter, such as aqueous solution of urea) of prior art together with the enforcement modification of hydraulic balance device 10 according to the present invention as hydraulic system 14.Dosage supply system 15 shown in Figure 1 comprises a supply system, and described supply system is dosage supplying module 13, be provided for reducing the medium of harmful matter such as for example dosage supply valve or dosage supply pump.Supply system preferably has for the reservoir vessel 40 and the supply pipeline 18 that store the medium that is used for the minimizing harmful matter, in order to dosage supplying module 13 is provided for reducing the medium of harmful matter.In order to carry for the medium that reduces harmful matter, shown here is implemented modification and is comprised conveying assembly 16, the preferred control pump of described conveying assembly or pressure.Dosage supplying module 13 comprises one or more dosage supply valves, and described dosage supply valve will enter for the media injections of minimizing harmful matter or be injected to air outlet flue, and wherein said air outlet flue is not shown in Figure 1.
Except described dosage supplying module 13 and supply system, dosage supply system 15 also comprises according to pressure equaliser proposed by the invention 10.The example that is used for the assembly that is loaded liquid 12 of dosage supply system 15 is dosage supplying module 13, can use in an advantageous manner according to pressure equaliser 10 of the present invention on the described assembly that is loaded liquid.In the example that illustrates, pressure equaliser 10 is dosage supplying module 13 through the assembly 12 that is loaded liquid of a gas line 36 with dosage supply system 15 here, is connected.In addition, be coupled in the branch 44 of supply pipeline 18 through a connecting line 42 that is loaded liquid according to pressure equaliser proposed by the invention 10.
In the form of implementation according to Fig. 1, be connected on the supply pipeline 18 by an oil hydraulic cylinder 24 according to the gas reservoir 20 of pressure equaliser proposed by the invention 10, described oil hydraulic cylinder comprises a face 26 that can be loaded liquid.The face that is loaded liquid 26 of described oil hydraulic cylinder 24 is being in the state that is loaded pressure under dosage supply system 15 running statees when the medium that is used for the minimizing harmful matter is transported to dosage supplying module 13, the described face that is loaded liquid can preferably be configured film forming or piston.
In addition, gas reservoir 20 is received between oil hydraulic cylinder 24 and the gas line 36 that is connected with dosage supplying module 13.In favourable mode of execution, gas reservoir 20 is air accumulators, and described air accumulator is configured to air cylinder, comprises the face 28 that can be loaded gas, such as for example piston or film.The face 28 that is loaded gas links through the face that is loaded liquid 26 of linkage member 46 with oil hydraulic cylinder 24, and described linkage member for example is piston rod.First safety check 32 additionally is encased in the gas reservoir 20, so as to produce or stop to gas source 34, as the fresh air in the perimeter of vehicle for example, connection.
Design of the present invention is, in the running state of dosage supply system, preferred air is incorporated in the gas reservoir 20 as the pressure damping volume so as of short durationly to reduce, the in other words pressure pulsation in the balanced hydraulic system pressure.In the running state of dosage supply system 15, as shown in Figure 1, oil hydraulic cylinder 24 is under the state that loads by liquid.Linkage member 46 to gas reservoir 20 plays the effect that pressure-loaded can be loaded the face 28 of gas, and wherein, preferred air is from a gas source 34, enter by the first safety check 32 such as the perimeter.Therefore, gas reservoir 20 is filled wholly or in part, and can be used as the compressible gas volume 29 of pressure damper in running state.
The second application of the present invention is, stored-gas, for example air, and utilize it, for example under emergency shutdown or other failure condition, to guarantee the reliably antifreeze of assembly.This process should not have additional auxiliary energy or does not have the necessity ground of other control unit automatically to carry out.Therefore; a kind of gas; such as for example air; can automatically be introduced in the oil hydraulic circuit; for example in the oil hydraulic circuit of dosage supply system 15; and additional electric energy needn't be provided, and so received for example volumetric expansion of aqueous solution when freezing, and therefore protect the assembly 12 that is loaded liquid to avoid pressing the destruction of causing by unallowed high ice.
When disconnecting dosage supply system 15, conveying assembly 16 is shut down and the supply system pressure decreased.This causes loosening of oil hydraulic cylinder 24, and namely the liquid of face 26 loads and reduces.By the linkage member 46 between oil hydraulic cylinder 24 and the gas reservoir 20, the pressure-loaded that is loaded the face 28 of gas also reduces.A reposition element 30 is driven into through second safety check 38 in the assembly that is loaded liquid 12 of waiting to be blown of dosage supply system 15 by gas line 36 such as the gas volume 29 that spring for example shown in Figure 1 will be stored in the gas reservoir 20, and assembly 12 is for example by 13 expressions of dosage module in this embodiment.In an advantageous manner, in gas reservoir, be provided with ventilation orifice 48 in the reposition element side, form vacuum in order to when the vent gas storage, avoid being loaded on the face 28 of gas in reposition element 30 sides.Therefore, when dosage supply system 15 disconnected, the gas volume 29 that is stored in the gas reservoir 20 was introduced in the dosage supplying module 13 that is loaded liquid.This gas volume 29 that is incorporated in the dosage supplying module 13 that is loaded liquid is can be compressed, and freezes to shield in case the damage of dosage supplying module 13 when liquid volume expands in the situation.
Previously described device 10 namely not only in running state but also in state of rest, guaranteed therefore at any time, and the protection facility avoids the wear phenomenon that causes by pressure pulsation and avoids freeze damage in being lower than the external temperature of congealing point.In addition, pressure equaliser 10 also can be used on the assembly that is loaded liquid 12 that is different from selected dosage module 13 here of dosage supply system 15.One of this dosage supply system 15 is not only iced to press but also another example of the assembly that is loaded liquid that the pulsation that is stressed threatens for example can be conveying assembly 16.
Above-mentioned pressure equaliser 10 is so that the method that is loaded balance pressure fluctuation in the assembly 12 of liquid at least one of hydraulic system 14 becomes possibility.In the working state of hydraulic system 14, a gas volume 29 is introduced in the gas reservoir 20, described gas volume can be provided to gas reservoir 20 through the first safety check 32 when the pressure-loaded of oil hydraulic cylinder 24, and is used for the pressure pulsation damping when operation.
Under the state of rest of hydraulic system 14, the gas volume 29 of described storage is driven out of from gas reservoir 20, and is introduced in the assembly 12 that is loaded liquid.At this, gas volume 29 can be delivered to the assembly 12 that is loaded liquid from gas reservoir 20 through the second safety check 38.Because the described compressibility that is incorporated into the gas volume in the assembly 12 that is loaded liquid, freezing in the situation this gas volume as expansion balance volume, and therefore the protection assembly 12 that is loaded liquid avoids pressing by ice and causes damage.
Can preferably be used in the dosage supply system 15 for the internal-combustion engine exhaust after-treatment by means of the method for above-mentioned pressure equaliser 10 balance pressures fluctuation.
Claims (12)
1. a pressure equaliser (10), it is loaded the assembly (12) of liquid at least one of hydraulic system (14), described hydraulic system has supplier, described supplier comprises conveying assembly (16) and supply pipeline (18), be used for supply liquid, it is characterized in that, at least one assembly (12) that is loaded liquid is connected with at least one gas reservoir (20), and described gas reservoir is controlled by means of hydraulic system pressure.
2. pressure equaliser according to claim 1 (10) is characterized in that, described at least one gas reservoir (20) autobalance described at least one be loaded pressure surge in the assembly (12) of liquid.
3. pressure equaliser according to claim 1 and 2 (10) is characterized in that, at least one hydraulic connecting element (22) makes described at least one gas reservoir (20) connect with a supply pipeline (18) of described hydraulic system (14).
4. pressure equaliser according to claim 3 (10) is characterized in that, described at least one hydraulic connecting element (22) comprises that at least one has the oil hydraulic cylinder (24) of the face (26) that can be loaded liquid.
5. according to the one or more described pressure equaliser (10) in the aforementioned claim, it is characterized in that, described at least one gas reservoir (20) comprises face (28) and a reposition element (30) that can be loaded gas.
6. according to claim 4 or 5 described pressure equalisers (10), it is characterized in that, the face (26) of the be loaded liquid of described oil hydraulic cylinder (24) be connected the face (28) of be loaded gas of gas reservoir (20) and connect rigidly.
7. according to the one or more described pressure equaliser (10) in the aforementioned claim, it is characterized in that, described gas reservoir (20) comprises first safety check (32), and described the first safety check generation or interruption are to the connection of a gas source (34).
According to claim 6 with 7 pressure equaliser, it is characterized in that, gas to the supply of described gas reservoir (20) is carried out through described the first safety check (32) when the pressure-loaded of described oil hydraulic cylinder (24), and described gas reservoir (20) stored-gas under the running state of described hydraulic system (14).
9. according to the one or more described pressure equaliser (10) in the aforementioned claim, it is characterized in that, at least one gas line (36) and at least one the second safety check (38) be installed in described gas reservoir (20) and described at least one be loaded between the assembly (12) of liquid.
10. according to the one or more described pressure equaliser (10) in the aforementioned claim, it is characterized in that, the gas volume (29) that can be stored in the gas reservoir (20) is driven out of from described gas reservoir (20) under the state of rest of hydraulic system (14) at least in part.
11. at least one that is equilibrated at hydraulic system (14) by the described pressure equaliser of aforementioned claim (10) is loaded the method for the pressure surge in the assembly (12) of liquid, wherein,
A. under the running state of described hydraulic system (14), gas volume (29) is incorporated in the gas reservoir (20),
B. under the state of rest of described hydraulic system (14), described gas volume (29) is incorporated into the described assembly (12) that is loaded liquid from described gas reservoir (20).
12. method according to claim 11 is characterized in that, described method is for the pressure surge of the dosage supply system that is equilibrated at delivery liquid functional aid, and described dosage supply system is used for the exhaust after-treatment of internal-combustion engine.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102010029834.4 | 2010-06-09 | ||
| DE102010029834A DE102010029834A1 (en) | 2010-06-09 | 2010-06-09 | Pressure equalization device for hydraulic systems |
| PCT/EP2011/057867 WO2011154222A1 (en) | 2010-06-09 | 2011-05-16 | Pressure equalization device for hydraulic systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102939444A true CN102939444A (en) | 2013-02-20 |
Family
ID=44509824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011800285759A Pending CN102939444A (en) | 2010-06-09 | 2011-05-16 | Pressure equalization device for hydraulic systems |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2580439A1 (en) |
| CN (1) | CN102939444A (en) |
| DE (1) | DE102010029834A1 (en) |
| WO (1) | WO2011154222A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953853A (en) * | 2014-04-22 | 2014-07-30 | 东莞中子科学中心 | Device for balancing pressure fluctuation of liquid circulation loop |
| CN104613024A (en) * | 2014-12-29 | 2015-05-13 | 广东工业大学 | Intelligent fuzzy control precision servo air pressure balance unloading system |
| CN115182694A (en) * | 2022-07-19 | 2022-10-14 | 平顶山天安煤业股份有限公司 | Fidelity coring gas self-gain pressure control structure, coring device and control method |
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| US20040047783A1 (en) * | 2000-09-22 | 2004-03-11 | Sven Huber | Method and device for dosing a reducing agent for the removal of nitrogen oxides from exhaust gases |
| US20050252201A1 (en) * | 2004-05-17 | 2005-11-17 | Lecea Oscar A | Method and apparatus for reducing NOx emissions |
| WO2006099489A1 (en) * | 2005-03-15 | 2006-09-21 | Miskin, Mark, R. | Hydraulic lift assist for tractor towed earth moving apparatus |
| DE102008000594A1 (en) * | 2008-03-11 | 2009-09-17 | Robert Bosch Gmbh | Device for emptying reducing agent unit of internal combustion engine, particularly exhaust system, has mechanical suction or pressure unit, whose suction or pressure mechanism is impinged by mechanical energy storage |
| US20100115932A1 (en) * | 2008-01-22 | 2010-05-13 | Armin Kassel | Metering system |
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| US4187682A (en) * | 1979-01-02 | 1980-02-12 | The Boeing Company | Constant pressure hydraulic accumulator |
| US4667473A (en) * | 1983-09-26 | 1987-05-26 | Robinson Curtiss W | Low compensating accumulator and bungee |
| DE19617950A1 (en) * | 1996-05-04 | 1997-11-13 | Hydac Technology Gmbh | Piston accumulator with gas preload |
| CA2453074A1 (en) * | 2004-01-19 | 2005-07-19 | Carey T. Doerksen | Pressurized gas assisted hydraulic amplifier for a hydraulic lifting assembly |
| DE102004054238A1 (en) | 2004-11-10 | 2006-05-11 | Robert Bosch Gmbh | Dosing system and method for operating a dosing system |
| DE102008009650A1 (en) | 2008-02-18 | 2009-08-27 | Robert Bosch Gmbh | Dosing device for dosing e.g. urea water solution into exhaust gas in diesel engine of motor vehicle, has turn-off device equipped to partly empty dosing module and/or supply system by energy during loss of power supply of dosing device |
| DE102008013406A1 (en) | 2008-03-10 | 2009-09-17 | Robert Bosch Gmbh | Exhaust after-treatment device with improved pressure pulse damping |
| FR2949505B1 (en) * | 2009-09-03 | 2011-09-02 | Peugeot Citroen Automobiles Sa | REDUCER INJECTION DEVICE FOR SELECTIVE CATALYTIC REDUCTION AND ASSEMBLY COMPRISING AN ENGINE AND AN EXHAUST LINE PROVIDED WITH SUCH AN INJECTION DEVICE |
| FR2951775B1 (en) * | 2009-10-23 | 2012-06-22 | Coutier Moulage Gen Ind | DEVICE FOR INJECTING AN ADDITIVE PRODUCT IN A TREATMENT LINE |
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2010
- 2010-06-09 DE DE102010029834A patent/DE102010029834A1/en not_active Withdrawn
-
2011
- 2011-05-16 WO PCT/EP2011/057867 patent/WO2011154222A1/en active Application Filing
- 2011-05-16 CN CN2011800285759A patent/CN102939444A/en active Pending
- 2011-05-16 EP EP11730235.6A patent/EP2580439A1/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040047783A1 (en) * | 2000-09-22 | 2004-03-11 | Sven Huber | Method and device for dosing a reducing agent for the removal of nitrogen oxides from exhaust gases |
| US20050252201A1 (en) * | 2004-05-17 | 2005-11-17 | Lecea Oscar A | Method and apparatus for reducing NOx emissions |
| WO2006099489A1 (en) * | 2005-03-15 | 2006-09-21 | Miskin, Mark, R. | Hydraulic lift assist for tractor towed earth moving apparatus |
| US20100115932A1 (en) * | 2008-01-22 | 2010-05-13 | Armin Kassel | Metering system |
| DE102008000594A1 (en) * | 2008-03-11 | 2009-09-17 | Robert Bosch Gmbh | Device for emptying reducing agent unit of internal combustion engine, particularly exhaust system, has mechanical suction or pressure unit, whose suction or pressure mechanism is impinged by mechanical energy storage |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953853A (en) * | 2014-04-22 | 2014-07-30 | 东莞中子科学中心 | Device for balancing pressure fluctuation of liquid circulation loop |
| CN103953853B (en) * | 2014-04-22 | 2017-01-25 | 东莞中子科学中心 | Device for balancing pressure fluctuation of liquid circulation loop |
| CN104613024A (en) * | 2014-12-29 | 2015-05-13 | 广东工业大学 | Intelligent fuzzy control precision servo air pressure balance unloading system |
| CN104613024B (en) * | 2014-12-29 | 2017-05-31 | 广东工业大学 | A kind of Intelligent Fuzzy Control elaborate servo air pressure balance Load Relief System |
| CN115182694A (en) * | 2022-07-19 | 2022-10-14 | 平顶山天安煤业股份有限公司 | Fidelity coring gas self-gain pressure control structure, coring device and control method |
| CN115182694B (en) * | 2022-07-19 | 2023-05-09 | 平顶山天安煤业股份有限公司 | Fidelity coring gas self-gain pressure control structure, coring device and control method |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011154222A1 (en) | 2011-12-15 |
| DE102010029834A1 (en) | 2011-12-15 |
| EP2580439A1 (en) | 2013-04-17 |
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Application publication date: 20130220 |