EP3215739B1 - Pump unit for reducing agent of an exhaust-gas purification system - Google Patents

Pump unit for reducing agent of an exhaust-gas purification system Download PDF

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Publication number
EP3215739B1
EP3215739B1 EP15790158.8A EP15790158A EP3215739B1 EP 3215739 B1 EP3215739 B1 EP 3215739B1 EP 15790158 A EP15790158 A EP 15790158A EP 3215739 B1 EP3215739 B1 EP 3215739B1
Authority
EP
European Patent Office
Prior art keywords
diaphragm
pump unit
pump
unit according
housing
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.)
Active
Application number
EP15790158.8A
Other languages
German (de)
French (fr)
Other versions
EP3215739A1 (en
Inventor
Wendelin KLÜGL
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.)
Vitesco Technologies GmbH
Original Assignee
Vitesco Technologies 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
Application filed by Vitesco Technologies GmbH filed Critical Vitesco Technologies GmbH
Publication of EP3215739A1 publication Critical patent/EP3215739A1/en
Application granted granted Critical
Publication of EP3215739B1 publication Critical patent/EP3215739B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04B43/025—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms two or more plate-like pumping members in parallel
    • 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
    • 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]
    • 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
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/008—Spacing or clearance between cylinder and piston

Definitions

  • the invention relates to a pump unit for reducing agents of an exhaust gas cleaning system of a membrane arranged on a membrane carrier and with a pump housing for holding a radially outer collar of the membrane.
  • An exhaust gas cleaning system for such a pump unit is from the DE 44 10 022 A1 known.
  • a metering system is provided, through which a reducing agent can be supplied via a catalytic converter.
  • the pamphlets DE 10 2010 028 850 A1 , DE 10 2008 054 686 A1 and WO 2012 152498 A1 show diaphragm pumps, in which the promotion takes place by an up and down movement of the membrane, and wherein the membranes used are plate-shaped.
  • pump stages designed as positive displacement pumps are known for such metering systems. Seen from the radially outer collar, the membrane is clamped radially inside between housing parts of the pump housing. In the known pump stages, leakage often occurs between the pump housing and the radially outer collar of the membrane. Such a leak leads to malfunctions or even failure of the entire system.
  • the invention is based on the problem of developing a pump unit of the type mentioned at the outset in such a way that it has a particularly reliable tightness.
  • This design allows the radially outer collar with the reinforcing ring to be clamped and pressed between two housing parts of the pump housing under prestress. This ensures a particularly reliable seal on the outer collar of the membrane. In this way, leakages in the radially inner region of the membrane, as seen from the radially outer collar, are avoided. This design also ensures reliable operation of the entire exhaust gas cleaning system.
  • the reliability of the tightness of the pump stage is further increased if the radially outer collar of the membrane completely fills a holding groove produced by the housing parts.
  • the fastening of the reinforcement ring in the pump housing is particularly simple if the reinforcement ring is clamped between two housing parts of the pump housing.
  • the pump stage has a particularly high stability if the reinforcement ring is made of metal.
  • the reliability of the tightness of the pump stage is further increased if the reinforcement ring is integrally connected to the rubber-elastic material of the membrane.
  • the integral connection can be produced, for example, by vulcanization.
  • a particularly reliable fit of the reinforcement ring on the pump housing can be easily ensured if the reinforcement ring is pressed onto the pump housing.
  • Figure 1 shows a sectional view through a pump stage 1 designed as an orbital pump for reducing agent of an exhaust gas cleaning system, not shown, for an internal combustion engine of a motor vehicle.
  • an exhaust gas cleaning system is, for example, from the DE 44 10 022 A1 known.
  • the pump stage 1 has a pump housing 2, which is composed of several housing parts 3-5.
  • the pump housing 2 has a connection 6 for conveying the reducing agent.
  • a drive shaft 7 is rotatably mounted within the pump housing 2 and is mounted on a diaphragm carrier 9 via a roller bearing 8.
  • the membrane carrier 9 is connected to the radially inner region of a membrane 10.
  • the membrane 10 has two radially outer collars 11, 12, which are each clamped between two housing parts 3-5.
  • the housing parts 3 - 5 have circumferential retaining grooves 13, 14 for the edges 11, 12. It can be clearly seen that the collars 11, 12 of the membrane 10 completely fill the holding grooves 13, 14.
  • the bundles 11, 12 each form a reinforcing ring 15, 16 of the membrane 10 due to their shape Figure 1 a separation chamber pin 17 of pump stage 1.
  • FIG. 2 shows a partial area of a further embodiment of a pump stage 18 with a pump housing 19 before mounting on a membrane 20.
  • the pump housing 19 has three housing parts 21-23 completely fill the housing groove 26, 27 formed in the housing parts.
  • the bundles 24, 25 also each have a reinforcement ring 28, 29 made of metal. In the assembled state of the pump stage 18, the reinforcement rings 28, 29 are pressed onto the housing parts 21-23.
  • the membrane 20 is attached to a membrane carrier 30.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Combustion & Propulsion (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Reciprocating Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Description

Die Erfindung betrifft eine Pumpeneinheit für Reduktionsmittel einer Abgasreinigungsanlage einer auf einem Membranträger angeordneten Membran und mit einem Pumpengehäuse zur Halterung eines radial äußeren Bundes der Membran.The invention relates to a pump unit for reducing agents of an exhaust gas cleaning system of a membrane arranged on a membrane carrier and with a pump housing for holding a radially outer collar of the membrane.

Eine Abgasreinigungsanlage für eine solche Pumpeneinheit ist aus der DE 44 10 022 A1 bekannt. Bei dieser Abgasreinigungsanlage ist ein Dosiersystem vorgesehen, über einem Katalysator ein Reduktionsmittel zuführbar ist. Die Druckschriften DE 10 2010 028 850 A1 , DE 10 2008 054 686 A1 und WO 2012 152498 A1 zeigen Membranpumpen, bei denen die Förderung durch eine Auf- und Ab-Bewegung der Membran erfolgt, und wobei die verwendeten Membranen plattenförmig ausgebildet sind.An exhaust gas cleaning system for such a pump unit is from the DE 44 10 022 A1 known. In this exhaust gas cleaning system, a metering system is provided, through which a reducing agent can be supplied via a catalytic converter. The pamphlets DE 10 2010 028 850 A1 , DE 10 2008 054 686 A1 and WO 2012 152498 A1 show diaphragm pumps, in which the promotion takes place by an up and down movement of the membrane, and wherein the membranes used are plate-shaped.

In der Praxis sind für solche Dosiersysteme als Verdrängerpumpen ausgebildete Pumpenstufen bekannt. Die Membran ist von dem radial äußeren Bund aus gesehen radial innerhalb zwischen Gehäuseteilen des Pumpengehäuses eingespannt. Bei den bekannten Pumpenstufen entsteht häufig zwischen dem Pumpengehäuse und dem radial äußeren Bund der Membran eine Leckage. Eine solche Leckage führt zu Funktionsstörungen bis hin zum Ausfall des gesamten Systems. Der Erfindung liegt das Problem zugrunde, eine Pumpeneinheit der eingangs genannten Art so weiter zu bilden, dass sie eine besonders zuverlässige Dichtheit aufweist.In practice, pump stages designed as positive displacement pumps are known for such metering systems. Seen from the radially outer collar, the membrane is clamped radially inside between housing parts of the pump housing. In the known pump stages, leakage often occurs between the pump housing and the radially outer collar of the membrane. Such a leak leads to malfunctions or even failure of the entire system. The invention is based on the problem of developing a pump unit of the type mentioned at the outset in such a way that it has a particularly reliable tightness.

Dieses Problem wird erfindungsgemäß dadurch gelöst, dass der radial äußere Bund der Membran einen Verstärkungsring hat.This problem is solved according to the invention in that the radially outer collar of the membrane has a reinforcement ring.

Durch diese Gestaltung kann der radial äußere Bund mit dem Verstärkungsring unter Vorspannung zwischen zwei Gehäuseteilen des Pumpengehäuses eingespannt und verpresst sein. Damit wird eine besonders zuverlässige Abdichtung bereits am äußeren Bund der Membrane gewährleistet. Hierdurch werden Leckagen im vom radial äußeren Bund gesehen radial inneren Bereich der Membrane vermieden. Durch diese Gestaltung wird zudem eine zuverlässige Funktion der gesamten Abgasreinigungsanlage sichergestellt.This design allows the radially outer collar with the reinforcing ring to be clamped and pressed between two housing parts of the pump housing under prestress. This ensures a particularly reliable seal on the outer collar of the membrane. In this way, leakages in the radially inner region of the membrane, as seen from the radially outer collar, are avoided. This design also ensures reliable operation of the entire exhaust gas cleaning system.

Damit ist dies Pumpenstufe insbesondere für den Einsatz in so genannten SCR Pumpeneinheiten geeignet.This makes the pump stage particularly suitable for use in so-called SCR pump units.

Zur weiteren Erhöhung der Zuverlässigkeit der Dichtheit der Pumpenstufe trägt es gemäß einer anderen vorteilhaften Weiterbildung der Erfindung bei, wenn der radial äußere Bund der Membran eine von den Gehäuseteilen erzeugten Haltenut vollständig ausfüllt.According to another advantageous development of the invention, the reliability of the tightness of the pump stage is further increased if the radially outer collar of the membrane completely fills a holding groove produced by the housing parts.

Die Befestigung des Verstärkungsrings in dem Pumpengehäuse gestaltet sich gemäß einer anderen vorteilhaften Weiterbildung der Erfindung besonders einfach, wenn der Verstärkungsring zwischen zwei Gehäuseteilen des Pumpengehäuses eingespannt ist.According to another advantageous development of the invention, the fastening of the reinforcement ring in the pump housing is particularly simple if the reinforcement ring is clamped between two housing parts of the pump housing.

Die Pumpenstufe weist gemäß einer anderen vorteilhaften Weiterbildung der Erfindung eine besonders hohe Stabilität auf, wenn der Verstärkungsring aus Metall gefertigt ist.According to another advantageous development of the invention, the pump stage has a particularly high stability if the reinforcement ring is made of metal.

Zur weiteren Erhöhung der Zuverlässigkeit der Dichtheit der Pumpenstufe trägt es gemäß einer anderen vorteilhaften Weiterbildung der Erfindung bei, wenn der Verstärkungsring stoffschlüssig mit gummielastischem Material der Membran verbunden ist. Die stoffschlüssige Verbindung kann beispielsweise durch ein Anvulkanisieren erzeugt werden.According to another advantageous development of the invention, the reliability of the tightness of the pump stage is further increased if the reinforcement ring is integrally connected to the rubber-elastic material of the membrane. The integral connection can be produced, for example, by vulcanization.

Ein besonders zuverlässiger Sitz des Verstärkungsringes auf dem Pumpengehäuse lässt sich gemäß einer anderen vorteilhaften Weiterbildung der Erfindung einfach sicherstellen, wenn der Verstärkungsring auf dem Pumpengehäuse aufgepresst ist.According to another advantageous development of the invention, a particularly reliable fit of the reinforcement ring on the pump housing can be easily ensured if the reinforcement ring is pressed onto the pump housing.

Die Erfindung lässt zahlreiche Ausführungsformen zu. Zur weiteren Verdeutlichung ihres Grundprinzips sind zwei davon in der Zeichnung dargestellt und werden nachfolgend beschrieben. Diese zeigt in:

Fig. 1
eine Schnittdarstellung durch eine Pumpenstufe,
Fig. 2
eine weitere Ausführungsform der Pumpenstufe.
The invention permits numerous embodiments. To further clarify its basic principle, two of them are shown in the drawing and are described below. This shows in:
Fig. 1
2 shows a sectional view through a pump stage,
Fig. 2
another embodiment of the pump stage.

Figur 1 zeigt eine Schnittdarstellung durch eine als Orbitalpumpe ausgebildete Pumpenstufe 1 für Reduktionsmittel einer nicht dargestellten Abgasreinigungsanlage für eine Brennkraftmaschine eines Kraftfahrzeuges. Eine solche Abgasreinigungsanlage ist beispielsweise aus der DE 44 10 022 A1 bekannt. Figure 1 shows a sectional view through a pump stage 1 designed as an orbital pump for reducing agent of an exhaust gas cleaning system, not shown, for an internal combustion engine of a motor vehicle. Such an exhaust gas cleaning system is, for example, from the DE 44 10 022 A1 known.

Die Pumpenstufe 1 hat ein Pumpengehäuse 2, welches sich aus mehreren Gehäuseteilen 3 - 5 zusammensetzt. Das Pumpengehäuse 2 hat einen Anschluss 6 zur Förderung des Reduktionsmittels. Innerhalb des Pumpengehäuses 2 ist eine Antriebswelle 7 drehbar gelagert und über ein Wälzlager 8 an einem Membranträger 9 gelagert. Der Membranträger 9 ist mit dem radial inneren Bereich einer Membran 10 verbunden. Die Membran 10 hat zwei radial äußere Bunde 11, 12, welche jeweils zwischen zwei Gehäuseteilen 3 - 5 eingespannt sind. Die Gehäuseteile 3 - 5 weisen für die Ränder 11, 12 umlaufende Haltenuten 13, 14 auf. Deutlich ist zu erkennen, dass die Bunde 11, 12 der Membran 10 die Haltenuten 13, 14 vollständig ausfüllen. Die Bunde 11, 12 bilden durch ihre Form jeweils einen Verstärkungsring 15, 16 der Membran 10. Weiterhin zeigt Figur 1 einen Trennkammerpin 17 der Pumpenstufe 1.The pump stage 1 has a pump housing 2, which is composed of several housing parts 3-5. The pump housing 2 has a connection 6 for conveying the reducing agent. A drive shaft 7 is rotatably mounted within the pump housing 2 and is mounted on a diaphragm carrier 9 via a roller bearing 8. The membrane carrier 9 is connected to the radially inner region of a membrane 10. The membrane 10 has two radially outer collars 11, 12, which are each clamped between two housing parts 3-5. The housing parts 3 - 5 have circumferential retaining grooves 13, 14 for the edges 11, 12. It can be clearly seen that the collars 11, 12 of the membrane 10 completely fill the holding grooves 13, 14. The bundles 11, 12 each form a reinforcing ring 15, 16 of the membrane 10 due to their shape Figure 1 a separation chamber pin 17 of pump stage 1.

Figur 2 zeigt einen Teilbereich einer weiteren Ausführungsform einer Pumpenstufe 18 mit einem Pumpengehäuse 19 vor der Montage an einer Membran 20. Das Pumpengehäuse 19 hat drei Gehäuseteile 21 - 23. Die Membran 20 hat an ihrem radial äußeren Bereich zwei umlaufende Bunde 24, 25, welche eine von den Gehäuseteilen gebildete Haltenut 26, 27 vollständig ausfüllen. Die Bunde 24, 25 weisen zudem jeweils einen Verstärkungsring 28, 29 aus Metall auf. Im montierten Zustand der Pumpenstufe 18 sind die Verstärkungsringe 28, 29 auf den Gehäuseteilen 21 - 23 aufgepresst. Die Membran 20 ist auf einem Membranträger 30 befestigt. Figure 2 shows a partial area of a further embodiment of a pump stage 18 with a pump housing 19 before mounting on a membrane 20. The pump housing 19 has three housing parts 21-23 completely fill the housing groove 26, 27 formed in the housing parts. The bundles 24, 25 also each have a reinforcement ring 28, 29 made of metal. In the assembled state of the pump stage 18, the reinforcement rings 28, 29 are pressed onto the housing parts 21-23. The membrane 20 is attached to a membrane carrier 30.

Claims (6)

  1. Pump unit for reducing agents of an exhaust gas purification system for an internal combustion engine of a motor vehicle having a diaphragm (10, 20) which is arranged on a diaphragm carrier (9, 30), and having a pump housing (2, 19) for securing a radially outer collar (11, 12, 24, 25) of the diaphragm (10, 20), characterized in that the diaphragm (10, 20) is of annular configuration, the diaphragm (10, 20) having two radially outer collars (11, 12, 24, 25) which are spaced apart axially with respect to one another and the collars (11, 12, 24, 25) of the diaphragm (10, 20) each having a reinforcing ring (15, 16, 28, 29).
  2. Pump unit according to Claim 1, characterized in that the radially outer collars (11, 12, 24, 25) of the diaphragm (10, 20) each completely fills a holding groove (13, 14, 26, 27) which is produced by the housing parts (3-5, 21-23).
  3. Pump unit according to Claim 1 or 2, characterized in that in each case one of the reinforcing rings (15, 16, 28, 29) is clamped in between two housing parts (3-5, 21-23) of the pump housing.
  4. Pump unit according to one of Claims 1 to 3, characterized in that at least one of the reinforcing rings (28, 29) is produced from metal.
  5. Pump unit according to one of Claims 1 to 4, characterized in that at least one of the reinforcing rings (28, 29) is connected in an integrally joined manner to elastomeric material of the diaphragm.
  6. Pump unit according to one of Claims 1 to 5, characterized in that at least one of the reinforcing rings (28, 29) is pressed on the pump housing (2, 19).
EP15790158.8A 2014-11-06 2015-11-05 Pump unit for reducing agent of an exhaust-gas purification system Active EP3215739B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014222743.7A DE102014222743A1 (en) 2014-11-06 2014-11-06 Pump unit for reducing agent of an emission control system
PCT/EP2015/075806 WO2016071443A1 (en) 2014-11-06 2015-11-05 Pump unit for reducing agents in an exhaust gas purification system

Publications (2)

Publication Number Publication Date
EP3215739A1 EP3215739A1 (en) 2017-09-13
EP3215739B1 true EP3215739B1 (en) 2020-04-22

Family

ID=54396904

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15790158.8A Active EP3215739B1 (en) 2014-11-06 2015-11-05 Pump unit for reducing agent of an exhaust-gas purification system

Country Status (5)

Country Link
US (1) US10378528B2 (en)
EP (1) EP3215739B1 (en)
CN (1) CN107076135B (en)
DE (1) DE102014222743A1 (en)
WO (1) WO2016071443A1 (en)

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US3408947A (en) * 1967-03-14 1968-11-05 William J Easton Jr Diaphragm pump with single compression roller
US4332534A (en) * 1978-12-14 1982-06-01 Erich Becker Membrane pump with tiltable rolling piston pressing the membrane
DE3414006C2 (en) * 1984-04-13 1986-03-06 Bran & Lübbe GmbH, 2000 Norderstedt Piston diaphragm pump
DE3706338A1 (en) * 1987-02-27 1988-09-08 Wagner Gmbh J DIAPHRAGM PUMP DEVICE
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DE4136805A1 (en) * 1991-11-08 1993-05-13 Almatec Tech Innovationen Gmbh DOUBLE DIAPHRAGM PUMP
DE4410022A1 (en) 1994-03-23 1995-10-05 Siemens Ag Exhaust gas cleaning system for IC engine
DE29708906U1 (en) * 1997-05-21 1997-07-17 Lang Apparatebau Gmbh, 83313 Siegsdorf Piston diaphragm pump with sealless piston-cylinder unit
JP3542990B2 (en) * 2001-12-05 2004-07-14 株式会社ヤマダコーポレーション Diaphragm pump device
DE102008054686A1 (en) 2008-12-16 2010-06-17 Robert Bosch Gmbh Fluid delivery device, particularly for conveying exhaust gas treatment media, e.g. urea-water solution, for internal combustion engine of system of motor vehicle, has movable working wall such as membrane
DE102010028850A1 (en) * 2010-05-11 2011-11-17 Robert Bosch Gmbh conveyor
DE102011015110B3 (en) * 2011-03-19 2012-01-26 Ebm-Papst St. Georgen Gmbh & Co. Kg dosing
DE102011075726A1 (en) 2011-05-12 2012-11-15 Robert Bosch Gmbh Storage tank and functional unit for this purpose
DE102012221492B4 (en) * 2012-11-23 2021-12-30 Robert Bosch Gmbh Diaphragm pump with eccentric drive and integrated shut-off valve
DE102014112391A1 (en) * 2014-08-28 2016-03-03 Continental Automotive Gmbh Pump for conveying a liquid, in particular for the promotion of an exhaust gas purification additive

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Title
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Also Published As

Publication number Publication date
CN107076135B (en) 2020-08-11
EP3215739A1 (en) 2017-09-13
WO2016071443A1 (en) 2016-05-12
US20180306177A1 (en) 2018-10-25
CN107076135A (en) 2017-08-18
DE102014222743A1 (en) 2016-05-12
US10378528B2 (en) 2019-08-13

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