EP2459876A1 - Fluid-förderpumpe - Google Patents
Fluid-förderpumpeInfo
- Publication number
- EP2459876A1 EP2459876A1 EP10719948A EP10719948A EP2459876A1 EP 2459876 A1 EP2459876 A1 EP 2459876A1 EP 10719948 A EP10719948 A EP 10719948A EP 10719948 A EP10719948 A EP 10719948A EP 2459876 A1 EP2459876 A1 EP 2459876A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- membrane
- electromagnet
- fluid
- armature
- pump according
- 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
- 239000012530 fluid Substances 0.000 title claims abstract description 56
- 239000012528 membrane Substances 0.000 claims abstract description 42
- 230000005672 electromagnetic field Effects 0.000 claims abstract description 12
- 239000002184 metal Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 229920002943 EPDM rubber Polymers 0.000 claims description 2
- 239000000446 fuel Substances 0.000 description 8
- 238000004804 winding Methods 0.000 description 8
- 239000007789 gas Substances 0.000 description 6
- 239000002245 particle Substances 0.000 description 5
- 239000003054 catalyst Substances 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000003302 ferromagnetic material Substances 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000003466 welding Methods 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
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
- F04B43/04—Pumps having electric drive
-
- 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
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
- F04B17/04—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids
-
- 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
- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
- F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
- F04B35/045—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric using solenoids
-
- 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
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/0009—Special features
- F04B43/0054—Special features particularities of the flexible members
Definitions
- the invention relates to a fluid feed pump for injecting a fluid into an exhaust system of an internal combustion engine.
- the internal combustion engine is a diesel engine
- a particulate filter is often provided in the exhaust gas line, which reduces the fine dust emission due to its filtering effect.
- the regeneration is carried out by increasing the temperature, for example, to about 600 degrees Celsius, whereby the particles, especially soot particles, burn. Since this is not possible in all operating states by means of engine measures, the temperature increase is achieved by means of fuel, for example diesel, which is injected into the exhaust gas line via an injection valve.
- the injected fuel passes to an oxidation catalyst, which is arranged upstream of the particle filter in the flow direction.
- the fuel is oxidized or burned in the oxidation catalyst and thus leads to an increase in exhaust gas temperature.
- hot exhaust gases reach the downstream particle filter and there cause the regeneration by burning the particles deposited in the filter.
- a urea solution is often injected into the exhaust gas line.
- DE 10 2004 057 688 A1 discloses a diaphragm pump with a pump diaphragm, an eccentric drive, a delivery chamber for a medium and an aggregate compartment separated from the pumping chamber by the pump diaphragm.
- the membrane body has a plunger bolt in its center.
- the invention is achieved by a fluid feed pump according to independent claim 1.
- the dependent claims describe advantageous embodiments of a fluid feed pump according to the invention.
- a fluid delivery pump comprises an electromagnet for generating an electromagnetic field, a movable armature which is located in the electromagnetic field generated by the electromagnet, and an elastic membrane. A portion of the membrane is attached directly to the anchor. By energizing the electromagnet an electromagnetic field can be generated.
- the armature, which is located in the electromagnetic field, is movable by the electromagnetic field. The membrane can thus be moved by means of the armature by energizing the electromagnet.
- the structure of the fluid feed pump is very simple. In particular, no lifting or push rod is required to connect the armature with the membrane.
- the mass moved during operation of the fluid pump is likewise reduced, as is the delay time between the start of the activation of the fluid feed pump and the beginning of the movement of the diaphragm. This reduces the activation duration and the power required for the operation of the fluid feed pump.
- the maximum possible pumping frequency is increased as well as the spread of the amount to be delivered per time. Due to the reduced mass of the moving parts, the energy is reduced when striking the armature at the end of the delivery stroke. The noise emission occurring during operation of the fluid feed pump are reduced as well as the wear.
- a portion of the membrane is attached to the solenoid.
- a fluid feed pump in which a portion of the membrane is attached to the solenoid is particularly simple, inexpensive and can be produced in a small space, since no additional components for attaching the membrane are necessary.
- the membrane is arranged such that within the electromagnet, a delivery volume that can be generated or varied by moving the membrane is formed.
- a delivery volume which is arranged within the electromagnet, can be heated by an electric current flow through the windings of the electromagnet. The fluid to be pumped can therefore be heated or thawed in a particularly simple and cost-effective manner.
- At least one inlet to or outlet from the delivery volume is formed inside the electromagnet. Characterized in that an inlet and / or a drain is disposed within the electromagnet, the inlet / outlet is heated by an electrical current flow through the windings of the electromagnet. Thus, a freezing of the fluid in the inlet and / or drain can be prevented or frozen fluid thawed without the need for an additional heating element is required.
- the armature is shaped so that the elastic membrane with increasing pressure of the fluid to be delivered in the delivery volume increasingly applies to the anchor.
- the membrane is supported by the armature with increasing pressure and prevents damage to the membrane at high fluid pressure in the delivery volume.
- the maximum possible discharge pressure is increased and the reproducibility of the pressure build-up is improved.
- a flat piece of metal is integrated into the membrane and secured to the anchor. By a piece of metal integrated into the membrane, a region of the membrane can be particularly simple and reliable, for. B. by welding, attach to the anchor.
- the membrane comprises a material that has good elastic deformability.
- the membrane comprises, in particular, ethylene-propylene-diene rubber.
- a membrane comprising an elastic material is particularly advantageous when the fluid to be delivered freezes, since the volume expansion of the fluid is absorbed by the elastic membrane and does not lead to damage of the fluid feed pump.
- Figure 1 is a schematic sectional view of a fluid feed pump according to the invention in the suction stroke; and Figure 2 is a schematic sectional view of a fluid feed pump according to the invention in the pressure stroke.
- FIG. 1 shows a schematic sectional view of a fluid feed pump according to the invention in the suction stroke.
- a fluid feed pump according to the invention has an electromagnet 6 with windings wound around an axis A.
- the electromagnet 6 also has a yoke, not shown in the figures, made of iron or another ferromagnetic material.
- an armature 4 is provided, which is elastically supported by a device, not shown in the figure 1, for example, a return spring, relative to the electromagnet 6.
- the armature 4 comprises a ferromagnetic material so that it is attracted by the electromagnet 6 when the electromagnet 6 is turned on and an electric current flows through the windings of the electromagnet 6.
- the Armature 4 is movable by switching on and off of the electromagnet 6 parallel to the axis A.
- a delivery volume 14 is formed about the axis A, which is bounded on the side facing away from the armature 4 by a pump body 20 and on the armature 4 side facing by an elastic membrane 2.
- a metal piece 8 is integrated, which is fastened to a region 5 which protrudes in an arcuate manner in the direction of the membrane 2 and which is formed in a central region of the armature 4.
- a feed 10 for supplying a fluid in the delivery volume 14 and a drain 12 for discharging the fluid from the delivery volume 14 is provided.
- a one-way valve inlet valve 16 At the mouth of the inlet 10 in the delivery volume 14 is designed as a one-way valve inlet valve 16, which allows a flow of fuel from the inlet 10 into the delivery volume 14 and a back flow of fuel from the delivery volume 14 into the inlet 10th prevented.
- a one-way valve drain valve 18 is provided at the mouth of the drain 12 in the delivery volume 14, which allows the flow of fuel from the delivery volume 14 into the drain 12 and a back flow of fuel from the drain 12 into the delivery volume 14 prevented.
- the valves 14, 16 may be formed, for example, as ball valves or as flutter valves. FIG.
- FIG. 1 shows the fluid feed pump according to the invention in the suction stroke, with the armature 4 and the elastic membrane 2 connected to it being in an upper suction position.
- the size of the delivery volume 14 is maximum.
- the drain valve 18 is closed, so that no fluid from the drain 12 is sucked into the delivery volume 14.
- FIG. 2 shows a fluid feed pump according to the invention in the pressure stroke.
- the armature 4 is as well as the membrane 2 in the lower discharge position in which the volume of the delivery volume 14 is minimal.
- the inlet valve 16 is closed in this flow direction, so that no fuel from the delivery volume 14 can get into the inlet 10.
- a central region 5 of the armature 4 is shaped so that it at least partially protrudes into the space around the axis A between the windings of the electromagnet 6, in which the delivery volume 14 is formed.
- Such support prevents the membrane 2 from being damaged when the fluid in the delivery volume 14 is under very high pressure.
- the maximum delivery pressure of the fluid delivery pump is increased and the reproducibility of the pressure build-up time is improved.
- the delivery volume 14, the inlet 10 and the outlet 12 are arranged within the windings of the electromagnet 6, they are heatable by heat, which is generated by the current flowing through the windings of the electromagnet 6, heated. No additional heating element is required to heat the fluid in the fluid delivery pump, thus preventing freezing of the fluid at low ambient temperatures or thawing frozen fluid.
- the amount of fluid delivered at each pump stroke is predetermined by the cross section of the delivery volume 14 and the stroke of the armature 4. As a result, an exact dosage of the pumped fluid is possible.
- the dosage is effected, for example, by a frequency-modulated control, i. by specifying the number of anchor strokes per unit of time.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009028027A DE102009028027A1 (de) | 2009-07-27 | 2009-07-27 | Fluid-Förderpumpe |
PCT/EP2010/057552 WO2011012348A1 (de) | 2009-07-27 | 2010-05-31 | Fluid-förderpumpe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2459876A1 true EP2459876A1 (de) | 2012-06-06 |
EP2459876B1 EP2459876B1 (de) | 2018-10-24 |
Family
ID=42537886
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10719948.1A Active EP2459876B1 (de) | 2009-07-27 | 2010-05-31 | Fluid-förderpumpe |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2459876B1 (de) |
DE (1) | DE102009028027A1 (de) |
WO (1) | WO2011012348A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9495180B2 (en) | 2013-05-10 | 2016-11-15 | Fireeye, Inc. | Optimized resource allocation for virtual machines within a malware content detection system |
DE102013211164A1 (de) | 2013-06-14 | 2014-12-31 | Robert Bosch Gmbh | Magnetaktor für ein Förderaggregat |
DE102015226463A1 (de) | 2015-12-22 | 2017-06-22 | Robert Bosch Gmbh | Magnetaktor für ein Förderaggregat |
DE102018213997A1 (de) | 2018-08-20 | 2020-02-20 | Robert Bosch Gmbh | Pumpenanordnung |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH251739A (de) * | 1946-09-30 | 1947-11-15 | Stacy Lagercrantz Mary | Pumpeneinrichtung. |
DE818503C (de) * | 1950-05-09 | 1951-10-25 | Richard Roentgen | Kuehlschrank |
US2659310A (en) * | 1950-09-02 | 1953-11-17 | Ryba Anton | Electromagnetic pumping device for pumping fluids |
DE3102032A1 (de) * | 1981-01-22 | 1982-08-19 | Roland 7776 Owingen Dürig | Membranpumpe |
CA1233363A (en) * | 1984-06-01 | 1988-03-01 | Robert E. Fischell | Single valve diaphragm pump with decreased sensitivity to ambient conditions |
JP5144253B2 (ja) * | 2004-03-16 | 2013-02-13 | ハーグレーブス テクノロジー コーポレーション | ポンプ密封装置 |
DE102004057688A1 (de) | 2004-11-30 | 2006-06-01 | Robert Bosch Gmbh | Membranpumpe und Membranpumpenmembran |
-
2009
- 2009-07-27 DE DE102009028027A patent/DE102009028027A1/de not_active Withdrawn
-
2010
- 2010-05-31 EP EP10719948.1A patent/EP2459876B1/de active Active
- 2010-05-31 WO PCT/EP2010/057552 patent/WO2011012348A1/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2011012348A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2011012348A1 (de) | 2011-02-03 |
EP2459876B1 (de) | 2018-10-24 |
DE102009028027A1 (de) | 2011-02-03 |
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