EP1660774A1 - Pompe de refoulement d'un milieu de traitement post rieur, en particulier d'une solution ur e-eau, pour moteurs diesel - Google Patents

Pompe de refoulement d'un milieu de traitement post rieur, en particulier d'une solution ur e-eau, pour moteurs diesel

Info

Publication number
EP1660774A1
EP1660774A1 EP04762689A EP04762689A EP1660774A1 EP 1660774 A1 EP1660774 A1 EP 1660774A1 EP 04762689 A EP04762689 A EP 04762689A EP 04762689 A EP04762689 A EP 04762689A EP 1660774 A1 EP1660774 A1 EP 1660774A1
Authority
EP
European Patent Office
Prior art keywords
pump
pump according
piston
membrane
medium
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.)
Withdrawn
Application number
EP04762689A
Other languages
German (de)
English (en)
Inventor
Roland Meyer
Dieter Maisch
Stefan Klotz
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.)
Hilite Germany GmbH
Original Assignee
Hydraulik Ring GmbH
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
Priority claimed from DE102004011123A external-priority patent/DE102004011123A1/de
Application filed by Hydraulik Ring GmbH filed Critical Hydraulik Ring GmbH
Publication of EP1660774A1 publication Critical patent/EP1660774A1/fr
Withdrawn legal-status Critical Current

Links

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
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/003—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by piezoelectric means
    • 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
    • F04B17/042—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the solenoid motor being separated from the fluid flow
    • 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
    • F04B17/046—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the fluid flowing through the moving part of the motor
    • 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

Definitions

  • the invention relates to a pump for conveying an exhaust gas aftertreatment medium, in particular a urea-water solution, for diesel engines according to the preamble of claim 1.
  • a pump is provided to convey the medium, which conveys the medium from a storage container.
  • the invention has for its object to design the generic pump so that with it the exhaust gas aftertreatment medium can be pumped reliably and reliably under the conditions occurring in diesel vehicles.
  • the pump element is formed by a piston which is displaceable against a counterforce during the pumping process.
  • the piston is separated from the medium to be pumped by the membrane. With the pump according to the invention sufficiently high pressures can be achieved. Since the piston is separated from the medium by the membrane, it is corrosion-resistant since it does not come into contact with the medium.
  • the membrane seals the piston so that a shaft seal in the area in contact with the medium is not necessary.
  • the pump is characterized by a simple structure and a long service life.
  • FIG. 3 shows a second embodiment of a pump according to the invention in a representation corresponding to FIG. 2,
  • Fig. 4 shows the detail Z in Fig. 3 in an enlarged view.
  • the pump is advantageously suitable for the use of exhaust gas aftertreatment devices for diesel engines. It can of course also be used for other pumping tasks.
  • the pump has a housing 1 which is provided with a cylindrical extension 2 on one end face. At least one magnetic coil 3 is embedded in the housing 1.
  • the housing 1 has a central axial receiving space 4, on the inner wall of which a sleeve-shaped ges slide bearing 5 is present. It rests with its one end on a radially inwardly directed annular shoulder surface 6 which projects from the inner wall 7 of the receiving space 4.
  • the slide bearing 5 there is a cup-shaped piston 8, which is axially movable against the force of at least one compression spring 9.
  • One end of the compression spring 9 is supported on a bottom 10 of the piston 8 and the other end on the underside of an adjusting screw 11 which is screwed into the neck 2. With the adjusting screw 11, the biasing force of the compression spring 9 can be adjusted continuously.
  • the adjusting screw 11 is provided on its underside with a central projection 12 which projects into the corresponding end of the compression spring 9.
  • the piston 8 is provided at its end facing the adjusting screw 11 with a radially outwardly directed flange 13 which, in one position (FIG. 2) of the piston 8, bears against a radially outwardly directed shoulder surface 14 in the inner wall 7 of the receiving space 4 ,
  • the adjusting screw 11 has an annular wall 15 on its circumference, on the inner wall of which the flange 13 of the piston 8 is guided.
  • a pump head 16 is connected, preferably screwed, to the housing 1 on the end face opposite the adjusting screw 11.
  • the pump head 16 has a housing 17 with a radially outwardly directed flange 18, with which the pump head 16 lies flat and sealed against the end face of the housing 1.
  • the head of the fastening screws 19 is advantageously recessed in the flange 18.
  • Two non-return valves 20, 21 are located in the pump head at a distance from one another, each of which is accommodated in a receptacle 22, 23 of the pump head 16.
  • the valve body 24 is loaded by at least one compression spring 25 in the direction of its closed position shown in FIG. 1, in which it has a bore 26 in the pump head 16 closes.
  • the axially parallel bore 26 connects the receiving space 22 with a pump space 27 which is closed by a membrane 28.
  • the pump chamber 27 is essentially formed by an end-side depression in the pump head 16.
  • the membrane 28 has a reinforced peripheral edge 29 which is clamped between the housing 1 and the flange 18 of the pump head 16.
  • the membrane 28 has on its side facing the piston 8 a central extension 30 which penetrates a central bore 31 of the bottom 10 of the piston 8.
  • At the free end of the extension 30 there is a thickening 32 which is used to axially secure the membrane 28 with respect to the piston 8.
  • the thickening 32 lies on the inside of the piston crown 10 and is designed such that the membrane 28 is captively connected to the piston 8.
  • a bore 33 opens into the receiving space 22 and is provided in a connecting plate 34. It is fastened in a sealed manner on the end face of the pump head 16 facing away from the housing 1.
  • valve body 35 which is of the same design as the valve body 24, but is arranged in the receiving space 23 rotated by 180 ° relative to it is.
  • a bore 36 is closed, which is provided parallel to the bore 33 in the connecting plate 34.
  • the valve body 35 is loaded by at least one compression spring 37 in the receiving space 23 in the direction of its closed position (FIG. 2).
  • the outer diameter of the valve body 35 is smaller than the diameter of the receiving space 23.
  • a bore 38 which is provided in the pump head 16 and is parallel to the bore 26, opens into the receiving space 23. The bore 38 connects the pump chamber 27 to the receiving chamber 23.
  • the compression spring 25 of the check valve 20 is supported at one end on the connecting plate 34 and at the other end on the valve body 24.
  • the compression spring 37 is supported at one end on the bottom of the receiving space 23 and at the other end on the valve body 35.
  • connection plate 34 facing away from the pump head 16 and through which the medium to be delivered is sucked in or discharged.
  • the solenoid 3 is energized so that the piston 8 is displaced against the force of the compression spring 9 until the piston 13 abuts the adjusting screw 11 with its flange 13 (FIG. 1).
  • the membrane 28 is carried along because it is axially fixed to the piston 8, whereby it generates a negative pressure in the bores 26, 38.
  • the valve body 24, supported by the force of the compression spring 25, reaches its closed position, in which it closes the bore 26.
  • the valve body 35 is lifted off the connecting plate 34 under the suction force against the force of the compression spring 37. This can over the connection 40 and the bore 36 get the medium into the receiving space 23.
  • the sucked medium flows past the valve body 35 via the bore 38 into the pump chamber 27.
  • the level of the pump pressure depends on the spring strength of the compression spring 9 with which the piston 8 is actuated. With the adjusting screw 11, the pump pressure can be finely adjusted after assembly.
  • the end face 41 of the piston crown 10 facing the membrane 28 is advantageously curved (FIG. 1) in such a way that the membrane 28 bears flat against the end face 41 in the deflected position according to FIG. 2 (FIG. 2). In this way, the membrane 28 is optimally supported and accordingly wears little.
  • the pump forms the combination of a vibrating piston pump and a diaphragm pump.
  • the oscillating piston part with the piston 8 serves as a maintenance-free drive, while the membrane 28 forms the pump element.
  • the material of the membrane 28 can be optimally adapted to the medium to be pumped.
  • the piston 8 does not come into contact with this medium and can therefore be made from a correspondingly inexpensive material.
  • Pressures can be achieved with the pump, for example in the order of magnitude of about 5 bar.
  • the pump is corrosion-resistant to aqueous solutions, since the oscillating piston part is sealed against the medium by the membrane 28. A shaft seal is not provided in the diaphragm pump part, so that problems associated therewith do not occur.
  • the pump described is freeze-proof since the pump piston 8 is in the position of smallest pump dead volume 27 in the idle state (de-energized magnet, FIG. 2). When the medium freezes, the resulting additional volume can be absorbed by the piston 8 receding against the spring 9.
  • the pump can be easily heated via the excitation coil 3, so that independent thawing of the medium is also possible after freezing.
  • the pump works maintenance-free at least over the life of the vehicle in which it is installed.
  • the pump according to FIGS. 3 and 4 differs from the previously described embodiment essentially in that instead of the piston spring 9 there is provided a plate spring 9 'integrated in the membrane 28, which is tightly enclosed by the membrane.
  • the fastening part 42 and the extension 30 are advantageously formed in one piece with one another.
  • the membrane 28 is preferably made of thermoplastic or vulcanized elastomer.
  • Fig. 3 shows the piston 8 in a position corresponding to Fig. 2 of the previous embodiment.
  • the coil 3 is not energized and the piston 8 is displaced so far under the force of the plate spring 9 'that its flange 13 abuts the shoulder surface 14 of the pump housing 1.
  • the membrane 28 lies flat against the curved end face 41 of the piston crown 10.
  • the function of the pump is otherwise the same as in the embodiment according to FIGS. 1 and 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Reciprocating Pumps (AREA)
  • Electromagnetic Pumps, Or The Like (AREA)

Abstract

Pompe qui possède un carter dans lequel est logé un élément de pompe à l'aide duquel le milieu est refoulé vers la sortie à partir d'un réservoir de stockage. Selon la présente invention, pour que le milieu de traitement postérieur puisse être refoulé sans problème et de manière fiable dans les conditions de fonctionnement de véhicules diesel, l'élément de pompe est un piston coulissant contre une force opposée et séparé du milieu par une membrane. Ledit piston résiste à la corrosion du fait qu'il ne se trouve pas en contact avec le milieu. La membrane étanchéifie le piston si bien que l'étanchéification de l'arbre dans la zone en contact avec le milieu n'est pas nécessaire. Ladite pompe est utilisée pour des dispositifs de traitement postérieur de gaz d'échappement dans des moteurs diesel.
EP04762689A 2003-09-02 2004-08-19 Pompe de refoulement d'un milieu de traitement post rieur, en particulier d'une solution ur e-eau, pour moteurs diesel Withdrawn EP1660774A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10341995 2003-09-02
DE102004011123A DE102004011123A1 (de) 2003-09-02 2004-03-08 Pumpe zur Förderung eines Abgasnachbehandlungsmediums, insbesondere einer Harnstoff-Wasser-Lösung, für Dieselmotoren
PCT/DE2004/001848 WO2005024232A1 (fr) 2003-09-02 2004-08-19 Pompe de refoulement d'un milieu de traitement postérieur, en particulier d'une solution urée-eau, pour moteurs diesel

Publications (1)

Publication Number Publication Date
EP1660774A1 true EP1660774A1 (fr) 2006-05-31

Family

ID=34276550

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04762689A Withdrawn EP1660774A1 (fr) 2003-09-02 2004-08-19 Pompe de refoulement d'un milieu de traitement post rieur, en particulier d'une solution ur e-eau, pour moteurs diesel

Country Status (5)

Country Link
US (1) US20070020123A1 (fr)
EP (1) EP1660774A1 (fr)
JP (1) JP2007504396A (fr)
DE (1) DE112004002131D2 (fr)
WO (1) WO2005024232A1 (fr)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080138211A1 (en) * 2004-04-12 2008-06-12 Gorman-Rupp Company Pump and valve system
DE102005015117B4 (de) * 2005-04-01 2007-04-26 Webasto Ag Hubkolbenbrennstoffpumpe und Verfahren zum Starten und Betreiben einer Kraftfahrzeugheizung
DE102007059239A1 (de) * 2007-12-07 2009-06-10 Thomas Magnete Gmbh Membran, und Hubkolben-Membranpumpe
JP4483952B2 (ja) * 2008-01-29 2010-06-16 株式会社デンソー モータ付ポンプ
GB2460825A (en) 2008-06-06 2009-12-16 Delphi Tech Inc Reagent dosing system
DE102008002467A1 (de) * 2008-06-17 2009-12-24 Robert Bosch Gmbh Dosiersystem für ein flüssiges Medium, insbesondere Harnstoff-Wasser-Lösung
DE102008055609B4 (de) * 2008-11-03 2011-12-29 Thomas Magnete Gmbh Hubkolbenpumpe
DE102008054686A1 (de) 2008-12-16 2010-06-17 Robert Bosch Gmbh Fluidfördereinrichtung
DE102008054689A1 (de) 2008-12-16 2010-06-17 Robert Bosch Gmbh Fluidfördereinrichtung
DE102009002148A1 (de) 2009-04-02 2010-10-14 Robert Bosch Gmbh Fluidfördereinrichtung
US9266709B2 (en) 2009-11-20 2016-02-23 Jack R. BRAMMELL Systems and methods for on-site mixing and dispensing of a reducing agent solution for use with a diesel catalytic converter
CH702437A1 (fr) * 2009-12-23 2011-06-30 Jean-Denis Rochat Pompe volumetrique alternative a membrane pour usage medical.
DE102010042944A1 (de) * 2010-10-26 2012-04-26 Robert Bosch Gmbh Arbeitswandelement einer Fluidfördereinrichtung
JP5419019B2 (ja) * 2010-10-28 2014-02-19 Ｓｍｃ株式会社 ソレノイドポンプ
DE102011010644A1 (de) 2011-02-09 2012-08-09 Emitec France S.A.S Fördereinheit für ein Reduktionsmittel
DE102011015110B3 (de) 2011-03-19 2012-01-26 Ebm-Papst St. Georgen Gmbh & Co. Kg Dosiersystem
DE102012000676A1 (de) * 2012-01-17 2013-07-18 Knf Flodos Ag Verdrängerpumpe
DE102012221479A1 (de) * 2012-11-23 2014-05-28 Robert Bosch Gmbh Vorrichtung, insbesondere Pumpe-Düse-System
DE102013101573A1 (de) * 2013-02-18 2014-08-21 Emitec France S.A.S Verfahren zum Beheizen einer Fördervorrichtung
DE102014218594A1 (de) * 2014-09-16 2016-03-17 Robert Bosch Gmbh Kolbenpumpe mit einem Bereich mit einem nichtmagnetischem Material im magnetischen Kreis
DE102014225412A1 (de) * 2014-12-10 2016-06-16 Robert Bosch Gmbh Kolbenpumpe mit einem Kolben mit profilierter Kolbenvorderseite
DE102017104400A1 (de) 2017-03-02 2018-09-06 Qonqave Gmbh Pumpenvorrichtung zu einer Förderung zumindest eines Fördermittels

Citations (3)

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Publication number Priority date Publication date Assignee Title
DD67037A1 (de) * 1968-07-12 1969-05-20 Max Grille Membran aus elastischem material fuer pumpen und verdichter
DE19819408A1 (de) * 1998-04-30 1999-11-11 Freudenberg Carl Fa Membranpumpe zur Förderung von gasförmigen oder flüssigen Medien
DE10147172A1 (de) * 2001-09-25 2003-04-24 Siemens Ag Reduktionsmittelpumpe für eine Abgasnachbehandlungsanlage einer Brennkraftmaschine

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US2724398A (en) * 1950-03-14 1955-11-22 Honeywell Regulator Co Proportional speed floating controller
DE4308837C1 (de) * 1993-03-19 1994-09-29 Eckerle Ind Elektronik Gmbh Verfahren und Schaltungsanordnung zur elektrischen Steuerung der Leistung einer Schwingkolbenpumpe
DE19631287B4 (de) * 1996-08-02 2004-01-15 Robert Bosch Gmbh Kraftstoffpumpvorrichtung für Zweitaktmotoren mit einer zusätzlichen Antriebseinheit
US6343539B1 (en) * 1999-11-10 2002-02-05 Benjamin R. Du Multiple layer pump diaphragm
US6526746B1 (en) * 2000-08-02 2003-03-04 Ford Global Technologies, Inc. On-board reductant delivery assembly
US6826906B2 (en) * 2000-08-15 2004-12-07 Engelhard Corporation Exhaust system for enhanced reduction of nitrogen oxides and particulates from diesel engines
DE10150518C1 (de) * 2001-10-12 2003-05-08 Siemens Ag Verfahren und Vorrichtung zur Abgasnachbehandlung bei einer Brennkraftmaschine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD67037A1 (de) * 1968-07-12 1969-05-20 Max Grille Membran aus elastischem material fuer pumpen und verdichter
DE19819408A1 (de) * 1998-04-30 1999-11-11 Freudenberg Carl Fa Membranpumpe zur Förderung von gasförmigen oder flüssigen Medien
DE10147172A1 (de) * 2001-09-25 2003-04-24 Siemens Ag Reduktionsmittelpumpe für eine Abgasnachbehandlungsanlage einer Brennkraftmaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2005024232A1 *

Also Published As

Publication number Publication date
DE112004002131D2 (de) 2006-07-13
JP2007504396A (ja) 2007-03-01
WO2005024232A1 (fr) 2005-03-17
US20070020123A1 (en) 2007-01-25

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