EP3559422A1 - Compensateur de pression dans une bulle de liquide emprisonnee dans la glace - Google Patents
Compensateur de pression dans une bulle de liquide emprisonnee dans la glaceInfo
- Publication number
- EP3559422A1 EP3559422A1 EP17818593.0A EP17818593A EP3559422A1 EP 3559422 A1 EP3559422 A1 EP 3559422A1 EP 17818593 A EP17818593 A EP 17818593A EP 3559422 A1 EP3559422 A1 EP 3559422A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- plunger
- tank
- liquid
- head
- ice
- 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
Classifications
-
- 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
- F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
- F01N3/2066—Selective catalytic reduction [SCR]
-
- 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
- F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
- F01N2260/10—Exhaust treating devices having provisions not otherwise provided for for avoiding stress caused by expansions or contractions due to temperature variations
-
- 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
-
- 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
- F01N2610/1406—Storage means for substances, e.g. tanks or reservoirs
-
- 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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/04—Accumulators
- F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
- F15B1/24—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with rigid separating means, e.g. pistons
Definitions
- the invention relates to the field of motor vehicles, and more specifically tanks intended to contain a liquid that may freeze under the normal conditions of use of the vehicle.
- These elaborate tanks generally comprise a technical module, partially immersed, in which are installed the pumping means and the level or temperature measuring devices for managing the distribution of the liquid contained in the reservoir.
- heating means are provided in the tank to prevent freezing of urea.
- a closed tank equipped with a technical module and containing a certain volume of urea was placed in a cold chamber maintained at a temperature of about -40 ° C.
- the technical module is totally immersed in the liquid volume. This volume of liquid is surmounted by a gaseous portion remaining throughout the experiment at atmospheric pressure.
- some components of the technical module such as the pump or level floats are also at atmospheric pressure.
- This phenomenon is related to the fact that the compressibility of the liquid forming the bubble is low and that, the formation of the ice continues, the volume increase related to this transition submits the liquid bubble to pressures progressing rapidly.
- the liquid bubble is gradually absorbed until all the liquid previously contained in the tank is converted into ice.
- the publication EP2829699 provides to have a deformable cavity under the application of pressure, connected to an exhaust in communication with the outside atmosphere.
- the volume expansion related to the formation of the ice is then compensated by the reduction of the volume of the deformable cavity.
- Similar embodiments are also described in the publications DE102009029375, DE102006050808 or DE102015204621 also provide deformable elements to absorb the variation of the volume of ice. These devices require means adapted to maintain the compressible bubble in the immersed volume.
- these flexible membranes operating at low temperature have reduced mechanical characteristics and reduced service life.
- DE102008054629 publication provides a fixed conduit penetrating into the liquid bubble and by which the pressurized liquid can rise to the surface. To prevent the liquid from freezing inside the duct, it is then necessary to provide particular insulation or heating means.
- the reservoir comprising a pressure compensation device aims to propose an original solution to overcome the problems mentioned above and to control this phenomenon of overpressure in the liquid bubble completely enclosed in a volume of forming ice surmounted by a volume of gas and contained in a tank closed by walls, in order to avoid degradation of the components of the technical module immersed in the liquid contained in the tank.
- This reservoir, closed by walls, therefore comprises a pressure compensator for regulating the pressure in a liquid bubble completely trapped in a volume of ice formation topped with a volume of gas.
- the pressure compensator comprises a plunger, movable along a vertical axis, formed of a head surmounting a body, and the faces of the body of the plunger have a positive or zero draft in a vertical direction and oriented from top to bottom , a height of the body of the plunger being adjusted so that a lower part of the body remains immersed in the liquid bubble, and for an upper part of the body to pass through the upper layer of ice and remain in the gas volume so that when the plunger rises under the action of the pressure prevailing in the liquid bubble and exerts itself on the body part of the plunger remaining immersed in the liquid, an additional volume is created within the space occupied by the bubble of fluid and helps to reduce the pressure in this space.
- the rise of the plunger under the effect of the prevailing pressure in the bubble of liquid will allow to release an additional volume within the space occupied by the bubble and help reduce the pressure in this space.
- a reservoir containing water, or water mixed with an alcohol such as a reservoir containing the window cleaning liquid may usefully include a pressure compensator as described above to avoid the degradation of the organs contained in the technical module mounted in said tank.
- the tank equipped with a pressure compensator according to the invention may also comprise in isolation, or in combination, the following characteristics:
- the draft angle of the body of the plunger is between 2 ° and 15 ° so that, when the plunger rises, a space between the ice and the surface of the body of the plunger is formed and allows the liquid contained in the bubble of escape.
- the body of the plunger has a substantially frustoconical shape.
- the body of the diver is substantially incompressible.
- the body of the plunger is polyoxymethylene.
- the plunger head travels in the vertical direction between a high limit and a low limit in a hollow cylinder attached to an upper wall of the reservoir.
- the hollow cylinder comprises a vent.
- a device exerts on the head of the plunger a predetermined constant force directed from top to bottom.
- the device exerting on the head of the plunger a predetermined constant force directed from top to bottom is formed by a spring disposed in the hollow cylinder and interposed between the head of the plunger and the upper wall of the reservoir.
- the head and body of the plunger form a hollow body closed at the top by a hydrophobic membrane.
- the head and body of the plunger form a hollow body filled with closed cell foam.
- a submerged technical module installed vertically below the pressure compensator.
- Figure 1 shows a sectional view of a reservoir in which is implanted a pressure compensator according to the invention.
- FIG. 2 is a detailed view of the compensator of FIG. 1.
- FIG 3 illustrates the situation in which the compensator lifts up and lets out some of the liquid contained in the liquid bubble.
- FIG. 4 illustrates an alternative embodiment of the compensator of pressure.
- Figure 1 schematically shows a tank 1, closed by an upper wall 10, a bottom wall 11 and side walls 12. A filling pipe 13 to fill the tank.
- a technical module 2 is implanted on the wall 11 forming the bottom of the tank 1. This technical module passes through the bottom of the tank to connect the units contained in the module to a power source, the control and control modules or the liquid outlet ducts to the gas pollution control system. exhaust and placed at atmospheric pressure outside the tank. Other secondary organs such as vents, heating means are not shown.
- the reservoir contains a liquid being frozen and comprising a solid phase volume G and a volume still in liquid form L, and forming a liquid bubble, bounded by the dotted line, fully trapped in the volume of ice cream G.
- the level N symbolizes the line of separation between the upper part of the tank filled with gas V and the ice block G. This level N corresponds substantially to the level of the liquid in the tank before the latter begins to freeze.
- the gaseous part V of the tank is at atmospheric pressure, and the gas contained in this part is formed of a mixture of vapor phase liquid and air.
- the pressure compensator 3 is disposed vertically above the technical module 2 so as to protect it from adverse effects that could produce a liquid bubble L forming in this area. It will be observed here that the liquid bubble L can extend in other zones of the tank in which the effects of the overpressure remain without consequence.
- the pressure compensator comprises a plunger 30 formed of a head 300 overcoming a body 301.
- the body of the plunger, 301 visible in detail in Figure 2, here has the shape of a truncated cone of vertical axis.
- This frustoconical shape is particularly well adapted so that the surface of the body 301 of the plunger 30 has a positive draft of vertical axis in a direction from top to bottom.
- This requirement indicates that it is appropriate no surface of the body of the plunger, or in other words no plane tangential to the surface of the body of the plunger, is strictly parallel or forms a negative angle with the vertical.
- the body of the diver can have shapes as varied as for example the shape of an inverted pyramid truncated at its top.
- the frustoconical shape makes a constant positive draft angle ⁇ with the vertical direction. This angle could be equal to zero but it will be observed that the radial stresses exerted by the ice on the surface of the body of the plunger and the friction forces exerted between the wall of the body of the plunger and the ice can prevent the ascent of the plunger . Also we prefer to choose a draft angle at least equal to 2 °.
- the body 301 of the plunger is substantially incompressible.
- the term “substantially” is understood here to mean that any variation in volume related to the pressure exerted on the body of the plunger is not such as to modify the resultant of the forces allowing the plunger to rise.
- the body of the plunger may be formed of a metal adapted to be immersed in the solution contained in the reservoir.
- the plunger 30 can advantageously realize the plunger 30 from a material such as a polyoxymethylene. Thanks to its structure and a high crystallinity, this material offers very good physical characteristics: a low coefficient of friction and a very good resistance to abrasion, a high resistance to traction and shocks, very good resistance to chemical agents , excellent dimensional stability, good creep resistance and finally a wide temperature range of use.
- Figure 3 shows the movement during which the plunger 30 rises and clears a gap between the ice G and the surface of the plunger, allowing the liquid in the bubble L to escape.
- the height h of the body 301 of the plunger 30 is adapted so that, when the liquid bag L appears during the freezing process, the lower portion 303 of the body 301 is immersed in the liquid, the intermediate portion 303 of the body being trapped in the volume G of ice surmounting the liquid bubble and the upper part 302 of the body of the plunger remaining in the aerial part V of the tank.
- This adaptation can be done by calculation by applying the laws of thermodynamics and exchanges of heat between the walls of the reservoir and the liquid, or more simply by an experimental observation of the evolution of the freezing of the liquid contained in the tank. In practice, this amounts to positioning the lower part of the plunger 30 as close as possible to the center of the liquid bubble whose location is made by an experimental process.
- the body 301 of the plunger 30 is surmounted by a head 300.
- This head 300 slides in a substantially vertical direction in a hollow cylinder 31 whose upper part is secured to the upper wall 10 of the tank 1.
- substantially vertical a direction making an angle of +/- 15 ° and preferably +/- 10 ° with the vertical direction.
- the hollow cylinder is formed of a thermoplastic material compatible with the material forming the walls of the tank on which it is welded.
- this hollow cylinder may advantageously be made of high density polyethylene (HDPE).
- a vent 310 is positioned in the upper part of the hollow cylinder 31.
- the stroke of the head 300 of the plunger is blocked downwards by a collar 311 interacting with a shoulder 305 disposed on the head of the plunger 30.
- the stroke of the plunger is limited upwards by the wall 11 of the reservoir, or by a mechanical stop high similar to the low stop described above, or by the contiguous turns of the spring.
- a spring 32 is interposed between the top of the head 300 and the wall 11. This spring exerts a constant force directed from top to bottom on the head 300 of the plunger 30.
- the calibration of the spring it can in this way control the threshold of the pressure in the liquid bubble L from which the plunger 30 will perform a lift. Above this threshold, the plunger 30 rises and releases the pressure in the liquid bubble L, below this threshold the plunger 30 rests against the shoulder 305 or, in the case where the space in which the liquid would come to freeze himself, on the ice itself.
- the spring can be replaced by any kind of equivalent means for raising or lowering the plunger in a controlled manner.
- a weighted diver could also be suitable.
- the walls of the head 300 and the body 301 of the plunger 30 define an interior volume in which it should be ensured that the liquid contained in the reservoir does not penetrate.
- Figure 4 illustrates an alternative embodiment of the invention, wherein the head 300 of the plunger 30 comprises a reduction 307 forming an inclined support on which the spring 32 comes to rest. This reduction makes it possible to facilitate the flow of the liquid downwards in the undesired case where the latter would come to be introduced through the vent 310.
- V Aerial part over the ice V Aerial part over the ice.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Health & Medical Sciences (AREA)
- Fluid-Damping Devices (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
- Degasification And Air Bubble Elimination (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1663385A FR3061256B1 (fr) | 2016-12-26 | 2016-12-26 | Compensateur de pression dans une bulle de liquide emprisonnee dans la glace. |
| PCT/EP2017/084532 WO2018122201A1 (fr) | 2016-12-26 | 2017-12-22 | Compensateur de pression dans une bulle de liquide emprisonnee dans la glace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3559422A1 true EP3559422A1 (fr) | 2019-10-30 |
| EP3559422B1 EP3559422B1 (fr) | 2020-10-28 |
Family
ID=58347641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP17818593.0A Active EP3559422B1 (fr) | 2016-12-26 | 2017-12-22 | Compensateur de pression dans une bulle de liquide emprisonnee dans la glace |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US11371410B2 (fr) |
| EP (1) | EP3559422B1 (fr) |
| CN (1) | CN110088441B (fr) |
| FR (1) | FR3061256B1 (fr) |
| WO (1) | WO2018122201A1 (fr) |
Family Cites Families (31)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62163823A (ja) * | 1986-01-14 | 1987-07-20 | Honda Motor Co Ltd | 合成樹脂製燃料タンク |
| JPH0718499B2 (ja) * | 1987-09-24 | 1995-03-06 | 株式会社丸山製作所 | 流体の調圧装置 |
| DE3916574B4 (de) * | 1989-01-24 | 2004-07-08 | Holzer, Walter, Prof. Dr.h.c. Ing. | Brennstoffbehälter mit Luftblase |
| US5056493A (en) | 1989-01-24 | 1991-10-15 | Walter Holzer | Environmentally harmonious fuel tank |
| CN2210990Y (zh) * | 1994-09-11 | 1995-10-25 | 张新永 | 限压安全阀 |
| JP2000027627A (ja) * | 1998-07-13 | 2000-01-25 | Hino Motors Ltd | 排気ガス浄化触媒用還元剤保温装置及びそれを組込んだ排気ガス浄化装置 |
| CN2615485Y (zh) * | 2003-03-05 | 2004-05-12 | 郑文辉 | 防爆液化气钢瓶 |
| JP2006123946A (ja) * | 2004-10-27 | 2006-05-18 | Tokiko Techno Kk | 液体供給装置 |
| DE102006050808A1 (de) * | 2006-10-27 | 2008-04-30 | Robert Bosch Gmbh | Tank zur Bevorratung eines Reduktionsmittels |
| US7793620B2 (en) | 2006-12-11 | 2010-09-14 | Ford Global Technologies, Llc | Integrated gaseous fuel delivery system |
| DE102006061735A1 (de) | 2006-12-28 | 2008-07-03 | Robert Bosch Gmbh | Belüftungsheizung für Reduktionsmitteltank |
| DE102008054629B4 (de) * | 2008-12-15 | 2023-05-04 | Robert Bosch Gmbh | Eisdruckfester Tank |
| DE102009000107A1 (de) * | 2009-01-09 | 2010-07-15 | Robert Bosch Gmbh | Eisdruckfeste Komponente |
| DE102009001736A1 (de) * | 2009-03-23 | 2010-09-30 | Robert Bosch Gmbh | Verfahren zum Betrieb eines SCR-Katalysators |
| DE102009029375A1 (de) * | 2009-09-11 | 2011-03-24 | Robert Bosch Gmbh | Fahrzeugtank mit Kompensationskörper |
| JP5051279B2 (ja) | 2009-12-21 | 2012-10-17 | 株式会社デンソー | 定残圧弁 |
| DE102010004612A1 (de) | 2010-01-13 | 2011-07-14 | Emitec Gesellschaft für Emissionstechnologie mbH, 53797 | Vorrichtung mit einem Tank und einer Fördereinheit für Reduktionsmittel |
| DE102011106663A1 (de) | 2011-07-05 | 2013-01-24 | Volkswagen Aktiengesellschaft | Fluidbehälter mit Einfüllrohr |
| US20130074936A1 (en) | 2011-09-27 | 2013-03-28 | Caterpillar Inc. | Mis-fill prevention system |
| KR101734280B1 (ko) * | 2011-11-16 | 2017-05-25 | 현대자동차 주식회사 | 차량용 연료탱크 |
| KR101606762B1 (ko) | 2011-11-16 | 2016-03-28 | 콘티넨탈 에미텍 페어발퉁스 게엠베하 | 탱크 외측의 액체 첨가제를 이송시키는 이송 장치 및 그 방법 |
| KR20160006176A (ko) * | 2013-05-07 | 2016-01-18 | 테네코 오토모티브 오퍼레이팅 컴파니 인코포레이티드 | 환원제 센서 시스템 |
| CN103277176B (zh) * | 2013-06-18 | 2015-04-01 | 苏州派格丽减排系统有限公司 | Scr计量喷射系统 |
| EP2829699A1 (fr) * | 2013-07-24 | 2015-01-28 | Inergy Automotive Systems Research (Société Anonyme) | Système de stockage d'additif de gaz d'échappement de moteur |
| EP2947444B1 (fr) | 2014-05-20 | 2018-03-07 | Inergy Automotive Systems Research (Société Anonyme) | Système de confinement de liquide pour véhicule et procédé pour en vérifier l'intégrité |
| CN203972430U (zh) * | 2014-06-04 | 2014-12-03 | 浙江水魔力清洁设备有限公司 | 一种多功能泄压接头 |
| CN204437388U (zh) * | 2014-11-26 | 2015-07-01 | 广东星星制冷设备有限公司 | 一种压力平衡阀 |
| DE102015204621A1 (de) * | 2015-03-13 | 2016-09-15 | Bayerische Motoren Werke Aktiengesellschaft | Behälter für flüssige Betriebsmittel eines Kraftfahrzeuges |
| US10215069B2 (en) * | 2016-08-18 | 2019-02-26 | Gm Globaly Technology Operations Llc | Pressure relief system for diesel exhaust fluid storage |
| US20180128141A1 (en) * | 2016-11-09 | 2018-05-10 | GM Global Technology Operations LLC | Pressure Relief Device For Tank |
| US10392988B2 (en) * | 2017-06-30 | 2019-08-27 | GM Global Technology Operations LLC | Pressure relief system for diesel exhaust fluid freeze damage mitigation |
-
2016
- 2016-12-26 FR FR1663385A patent/FR3061256B1/fr not_active Expired - Fee Related
-
2017
- 2017-12-22 WO PCT/EP2017/084532 patent/WO2018122201A1/fr not_active Ceased
- 2017-12-22 US US16/473,944 patent/US11371410B2/en active Active
- 2017-12-22 EP EP17818593.0A patent/EP3559422B1/fr active Active
- 2017-12-22 CN CN201780080070.4A patent/CN110088441B/zh not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP3559422B1 (fr) | 2020-10-28 |
| US20190368405A1 (en) | 2019-12-05 |
| FR3061256B1 (fr) | 2019-09-27 |
| US11371410B2 (en) | 2022-06-28 |
| FR3061256A1 (fr) | 2018-06-29 |
| CN110088441B (zh) | 2021-07-09 |
| WO2018122201A1 (fr) | 2018-07-05 |
| CN110088441A (zh) | 2019-08-02 |
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