EP1748188B1 - Pompe de dosage - Google Patents

Pompe de dosage Download PDF

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Publication number
EP1748188B1
EP1748188B1 EP20050016570 EP05016570A EP1748188B1 EP 1748188 B1 EP1748188 B1 EP 1748188B1 EP 20050016570 EP20050016570 EP 20050016570 EP 05016570 A EP05016570 A EP 05016570A EP 1748188 B1 EP1748188 B1 EP 1748188B1
Authority
EP
European Patent Office
Prior art keywords
pumping
armature
chamber
fuel
pump
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
EP20050016570
Other languages
German (de)
English (en)
Other versions
EP1748188A1 (fr
Inventor
Peter Wickelmeier
Elmar Ströhle
Reiner Anderschitz
Markus Jäger
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.)
Truma Geraetetechnik GmbH and Co KG
Original Assignee
Truma Geraetetechnik GmbH and Co KG
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 Truma Geraetetechnik GmbH and Co KG filed Critical Truma Geraetetechnik GmbH and Co KG
Priority to EP20050016570 priority Critical patent/EP1748188B1/fr
Priority to DE200550005266 priority patent/DE502005005266D1/de
Publication of EP1748188A1 publication Critical patent/EP1748188A1/fr
Application granted granted Critical
Publication of EP1748188B1 publication Critical patent/EP1748188B1/fr
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
    • F04B13/00—Pumps specially modified to deliver fixed or variable measured quantities
    • 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
    • F04B17/048—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the fluid flowing around the moving part of the motor

Definitions

  • the invention relates according to the preamble of claim 1, a metering pump for conveying liquid fuel.
  • Fuel metering pumps especially for diesel heaters, are known. These include, inter alia, electromagnetically operated metering piston pumps, the fuel z. B. to promote an independent heating unit of a motor vehicle.
  • the metering piston pump has an electromagnetic coil which radially encloses an axially reciprocable armature. With the armature, a pump piston is connected, which is axially reciprocating in a metering cylinder. In front of the pump piston, a pumping chamber is provided, into which fuel from an intermediate chamber surrounding the pump piston or the armature can flow via a connection opening when the pump piston is in a suction position. The suction position reaches the pump forming a conveyor unit with the armature by the action of a spring which supports the conveyor unit against a housing-fixed stop.
  • the armature When the coil is excited, the armature is moved axially in a conveying direction, so that the pump piston connected to the armature displaces the fuel located in the pumping chamber and delivers it via an outlet opening.
  • the connecting channel between the intermediate chamber and the pumping chamber is closed by the pumping piston in order to avoid a backflow of the fuel from the pumping chamber into the intermediate chamber.
  • the return movement of the conveyor unit from the conveying position into the suction position is effected by interrupting the excitation of the electromagnetic coil and the subsequent restoring action of the spring.
  • the renewed conveying movement of the conveyor unit is achieved by re-energizing the coil.
  • a valve spool is coupled to an armature which can be moved by energizing a solenoid against the action of a spring.
  • the valve spool controls the inflow to a pump chamber.
  • a pump piston is pushed back against the action of a spring.
  • the spring can move the pum penkolben back to its original position and thereby promote the liquid to the outlet.
  • an electromagnetic coil is arranged in a housing, which encloses an axially reciprocating armature radially.
  • a pump piston With the anchor a pump piston is firmly connected, which is axially reciprocating in a metering cylinder.
  • the armature and the pump piston together form a conveyor unit.
  • Front side of the pump piston a pumping chamber is arranged, which is enclosed by the metering cylinder and the pump piston.
  • a delivery-side outlet opening is present, via which the fuel delivered by the metering pump is removed.
  • an intermediate chamber is arranged between the inlet opening and the pumping chamber. Between the intermediate chamber and the pumping chamber there is a connecting channel which can be opened and closed in dependence on the position of the conveying unit.
  • the delivery unit is movable between a suction position and a delivery position, wherein in the suction position of the connecting channel is opened so that fuel from the intermediate chamber can flow into the pumping chamber, while in the delivery position of the connecting channel is closed and the inlet opening is opened, so that fuel off the inlet opening can flow into the intermediate chamber.
  • the opening and closing of the connecting channel accordingly takes place as a function of the position of the conveying unit, in particular of the pumping piston, which can open and close the opening of the connecting channel to the pumping chamber.
  • a spring device for. B. a coil spring provided, which forces the conveyor unit in an initial position.
  • the spring device is accordingly biased to ensure a reliable reaching the starting position by the conveyor unit.
  • the metering pump according to the invention is characterized in that the starting position, in which the conveyor unit consisting of the armature and the pump piston is forced by the spring device supported against the housing or fixed stop, is the conveying position. Upon energization of the electromagnetic coil, the generator unit is then moved from the conveying position into the suction position.
  • the starting position of the suction position can flow into the fuel from the intermediate chamber into the pumping chamber.
  • the conveying movement ie the movement of the conveyor unit from the suction position into the conveying position, is achieved by the electromagnetic excitation of the coil and the movement of the armature thereby forced.
  • the return movement from the conveying position into the suction position takes place in this prior art by the action of the spring.
  • the movement of the conveyor unit is exactly the reverse.
  • the return movement of the delivery unit from the delivery position is achieved in the suction position, so that fuel can flow into the pumping chamber.
  • the conveying movement that is, the movement of the conveyor unit from the suction position into the conveying position, however, is effected by the spring device.
  • the delivery stroke of the pump piston is generated solely by the spring force, the voltage applied to the electromagnetic coil has no influence on the delivery stroke. Rather, the delivery stroke is substantially constant, even if different voltages are applied to energize the coil.
  • the electrical voltage must only be sufficiently large so that the electromagnetic force of the coil is sufficient to move the conveyor unit against the action of the spring device.
  • the inlet opening is closed by the conveyor unit in the suction position. In this way, a return flow of the fuel from the intermediate chamber into the inlet opening, in particular during the return movement of the delivery unit from the delivery position into the suction position, is avoided.
  • the stop is formed on the inlet opening. Since the stop must be connected to the housing, that is to be provided fixed in the housing, it can be positioned at the inlet opening relatively close to the pump piston or the armature.
  • the spring device is preferably arranged in front of the armature, namely in particular between the armature and the inlet opening. That's one direct transfer of force to the conveyor unit comprising the anchor possible.
  • a check valve is arranged in the outlet opening, by allowing only one flow direction away from the pumping chamber. In this way, a return flow of the fuel from the outlet opening is avoided in the pumping chamber when the pump piston is moved back from the feed position to the suction position.
  • FIGURE shows a section through a metering pump according to the invention.
  • the metering pump according to the invention has a housing 1, which merges into an inlet flange 2 and an outlet flange 3 at the end.
  • an electromagnetic coil 4 is provided, which can receive electric power via a supply line, not shown, to be energized.
  • the coil 4 is held by a bobbin 5.
  • an inlet nozzle 6 and a suction valve seat 7 is used in the inlet flange 2.
  • a fuel filter 8 is further provided in a recess of the inlet nozzle 6, a fuel filter 8 is further provided.
  • a supply line can be connected, is introduced via the fuel from a fuel supply through the suction of the self-priming metering pump.
  • an outlet nozzle 9 is screwed with an actuating element 10.
  • the depth of engagement of the actuating element 10 can be varied in order thereby to be able to adjust the volume of a pump chamber, which will be explained later, and thus the delivery rate of the metering pump.
  • a check valve 11 is arranged, which can open and close an outlet opening 12.
  • a metering cylinder 13 is further held via a press fit, in which a pump piston 14 is axially reciprocable.
  • Front side of the pump piston 14 is a defined by the metering cylinder 13 and the pump piston 14 pumping chamber 15 is arranged.
  • the pumping chamber 15 has a minimum size.
  • the pump piston 14 is axially movable (in the figure to the right)
  • the volume of the pumping chamber 15 can be increased.
  • it is necessary that the pump chamber 15 facing the front edge of the pump piston 14 is moved far enough to the right that the openings of the connecting channels 16 are exposed to the pumping chamber 15 out.
  • a resilient stop 18 is then provided to the pumping chamber 15 thereafter.
  • an armature 19 is fixedly mounted on the pump piston 14 by means of a press fit.
  • the armature 19 cooperates with the electromagnetic coil 4, as will be explained later.
  • a spring 20 is inserted on the side of the armature 19 facing away from the pump piston 14.
  • an inlet opening 21 is also formed, via which fuel can flow into the intermediate chamber 17.
  • the armature 19 forms, together with the pumping piston 14, a delivery unit 23 which can be moved back and forth between a delivery position shown in the figure and a suction position.
  • the connecting channel 16 is closed by the pump piston 14, while the inlet opening 21 is open, so that fuel from the inlet opening 21 can flow into the intermediate chamber 17.
  • the conveyor unit 23 is in a position in which the armature 19 is moved in the figure to the right until it rests against a formed on the end face of the Saugventilsitzes 7 stop 24.
  • the armature 19 in turn carries a resilient stop 25 to avoid a hard impact on the stop 24.
  • the stationary stop 24 can be equipped with a spring elasticity.
  • the stop 25 and the opposite stationary stop 24 should be designed as soft as possible or with high elasticity in order to avoid a hard impact of the armature 19 on the Saugventilsitz 7. As a result, the noise can be further reduced.
  • the pump piston 14 In this suction position, the pump piston 14 is moved so far to the right that there is a communicating connection between the intermediate chamber 17 and the pumping chamber 15 via the connecting channels 16, so that fuel from the intermediate chamber 17 can flow into the pumping chamber 15.
  • the dosing pump works as follows:
  • the delivery unit 23 In the delivery position (initial position) shown in the figure, the delivery unit 23 is pressed by the action of the biased spring 20 to the left, so that the pump piston 14, the connecting channels 16 closes.
  • the delivery position is also referred to as the starting position, because it is achieved by the delivery unit 23 due to the action of the prestressed spring 20, without having to be supplied with energy from the outside.
  • the armature 19 and thus the entire delivery unit 23 is pulled to the right in the suction position, so that the connecting channel 16 can be opened and fuel can flow into the pumping chamber 15.
  • the inlet opening 21 is closed by the armature 19.
  • the spring 20 is additionally biased.
  • the electromagnetic coil is energized again to move the conveyor unit 23 in the return direction in the suction position, whereby the spring 20 is biased again.

Landscapes

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

Claims (6)

  1. Pompe de dosage pour refouler un carburant liquide, comprenant
    - une bobine électromagnétique (4) qui est disposée dans une enveloppe (1) et qui entoure radialement un induit (19) apte à décrire un mouvement de va-et-vient axial ;
    - un piston de pompe (14) qui est relié solidement à l'induit (19) pour former une unité de refoulement (23) et qui est apte à décrire un mouvement de va-et-vient axial dans un cylindre de dosage (13) ;
    - une chambre de pompe (15) qui est disposée côté frontal devant le piston de pompe (14) et qui est entourée par le cylindre de dosage (13) et le piston de pompe (14) ;
    - une ouverture d'admission (21) pour amener le carburant ;
    - une chambre intermédiaire (17) qui est prévue entre l'ouverture d'admission (21) et la chambre de pompe (15), dans le sens d'écoulement ;
    - un conduit de liaison (16) entre la chambre intermédiaire (17) et la chambre de pompe (15), qui est apte à être ouvert et fermé en fonction de la position de l'unité de refoulement (23) ;
    étant précisé
    - que l'unité de refoulement (23) est apte à être déplacée entre une position d'aspiration et une position de refoulement en fonction d'un état d'excitation de la bobine (4) ;
    - que dans la position d'aspiration, le conduit de liaison (16) est ouvert, de sorte que le carburant peut entrer dans la chambre de pompe (15) à partir de la chambre intermédiaire (17) ;
    - que dans la position de refoulement, le conduit de liaison (16) est fermé et l'ouverture d'admission (21) est ouverte, de sorte que le carburant peut entrer dans la chambre intermédiaire (17) par l'ouverture d'admission (21) ;
    - que grâce au piston de pompe (14), lors du déplacement de l'unité de refoulement (23) de la position d'aspiration vers la position de refoulement le carburant peut être refoulé de la chambre de pompe (15) vers une ouverture de sortie (12) qui fait suite à celle-ci ; et
    - qu'il est prévu entre l'unité de refoulement (23) et une butée (24) reliée à l'enveloppe (1) un dispositif à ressort (20) qui contraint l'unité de refoulement (23) dans une position de départ ;
    caractérisée
    - en ce que la position de départ est la position de refoulement ; et
    - en ce que l'unité de refoulement (23), lors d'une excitation de la bobine électromagnétique (4), est apte à être amenée de la position de refoulement dans la position d'aspiration.
  2. Pompe de dosage selon la revendication 1, caractérisée en ce qu'un déplacement de refoulement, c'est-à-dire un déplacement de l'unité de refoulement (23) de la position d'aspiration vers la position de refoulement, peut être exécuté uniquement grâce à l'action du dispositif à ressort (20).
  3. Pompe de dosage selon la revendication 1 ou 2, caractérisé en ce que dans la position d'aspiration, l'ouverture d'admission (21) est fermée par l'unité de refoulement (23).
  4. Pompe de dosage selon l'une des revendications 1 à 3, caractérisée en ce que la butée (24) est formée sur l'ouverture d'admission (21).
  5. Pompe de dosage selon l'une des revendications 1 à 4, caractérisée en ce que le dispositif à ressort (20) est disposé côté frontal devant l'induit (19), en particulier entre l'induit (19) et l'ouverture d'admission (21).
  6. Pompe de dosage selon l'une des revendications 1 à 5, caractérisée en ce qu'il est prévu dans l'ouverture de sortie (12) un clapet antiretour (11) grâce auquel seul un sens d'écoulement s'éloignant de la chambre de pompe (15) est autorisé.
EP20050016570 2005-07-29 2005-07-29 Pompe de dosage Active EP1748188B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20050016570 EP1748188B1 (fr) 2005-07-29 2005-07-29 Pompe de dosage
DE200550005266 DE502005005266D1 (de) 2005-07-29 2005-07-29 Dosierpumpe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20050016570 EP1748188B1 (fr) 2005-07-29 2005-07-29 Pompe de dosage

Publications (2)

Publication Number Publication Date
EP1748188A1 EP1748188A1 (fr) 2007-01-31
EP1748188B1 true EP1748188B1 (fr) 2008-09-03

Family

ID=35064932

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20050016570 Active EP1748188B1 (fr) 2005-07-29 2005-07-29 Pompe de dosage

Country Status (2)

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EP (1) EP1748188B1 (fr)
DE (1) DE502005005266D1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008013440A1 (de) * 2008-03-10 2009-09-17 Thomas Magnete Gmbh Magnetbetätigte Hubkolbenpumpe mit hydraulischer Dämpfung
DE102008055611A1 (de) * 2008-11-03 2010-05-06 Thomas Magnete Gmbh Hubkolbenpumpe
CN103562511A (zh) * 2011-05-05 2014-02-05 罗伯特·博世有限公司 尤其是用于操作泵的电磁的操作装置
US9464628B2 (en) 2010-03-26 2016-10-11 Thomas Magnete Gmbh Pump
USD905217S1 (en) 2018-09-05 2020-12-15 Dometic Sweden Ab Air conditioning apparatus
USD907183S1 (en) 2016-11-23 2021-01-05 Dometic Sweden Ab Air conditioning apparatus
US11772452B2 (en) 2017-11-16 2023-10-03 Dometic Sweden Ab Air conditioning apparatus for recreational vehicles

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006023492A1 (de) * 2006-05-18 2007-11-22 J. Eberspächer GmbH & Co. KG Dosierpumpe, insbesondere zum Fördern von Brennstoff für ein Fahrzeugheizgerät
DE102007031033A1 (de) * 2007-07-04 2007-10-31 J. Eberspächer GmbH & Co. KG Rückschlagventileinsatz für eine Brennstoffdosierpumpe
DE102008013441B4 (de) 2008-03-10 2010-10-14 Thomas Magnete Gmbh Dosierpumpe
DE102008046060B4 (de) 2008-09-08 2011-04-14 Thomas Magnete Gmbh Hydraulische Endlagendämpfung einer Hubkolbenpumpe
DE102008052589A1 (de) * 2008-10-21 2010-04-22 Behr Gmbh & Co. Kg Pumpvorrichtung
DE102008055608A1 (de) 2008-11-03 2010-05-06 Thomas Magnete Gmbh Hubkolbenpumpe
DE102008055612A1 (de) 2008-11-03 2010-05-06 Thomas Magnete Gmbh Hubkolbenpumpe
DE102008055610A1 (de) 2008-11-03 2010-05-06 Thomas Magnete Gmbh Hubkolbenpumpe
DE102008055609B4 (de) 2008-11-03 2011-12-29 Thomas Magnete Gmbh Hubkolbenpumpe
DE102008057365B4 (de) * 2008-11-14 2015-12-17 Eberspächer Climate Control Systems GmbH & Co. KG Verfahren zum Betreiben einer elektromagnetisch betriebenen Dosierpumpe mit Anschlagdämpfung
DE102008058046A1 (de) 2008-11-18 2010-05-20 Thomas Magnete Gmbh Hubkolbenpumpe
EP2375054B1 (fr) * 2010-04-06 2013-06-19 Delphi Technologies Holding S.à.r.l. Système et dosage de réactif et pompe
DE102014010450B3 (de) * 2014-07-15 2015-12-31 Thomas Magnete Gmbh Hubkolbenpumpe
DE102015101066B4 (de) * 2015-01-26 2024-03-14 Eberspächer Climate Control Systems GmbH Dosierpumpe, inbesondere Brennstoffdosierpumpe für ein Fahrzeugheizgerät
DE102015101067B4 (de) * 2015-01-26 2021-04-22 Eberspächer Climate Control Systems GmbH Dosierpumpe, insbesondere Brennstoffdosierpumpe für ein Fahrzeugheizgerät
DE102015101068B4 (de) * 2015-01-26 2021-04-22 Eberspächer Climate Control Systems GmbH Dosierpumpe, insbesondere Brennstoffdosierpumpe für ein Fahrzeugheizgerät
DE102015007465A1 (de) * 2015-06-09 2016-12-15 Thomas Magnete Gmbh Hubkolbenpumpe mit eingangsseitiger Förderstrombegrenzung und Verfahren zum Betrieb der Hubkolbenpumpe
CN105221381A (zh) * 2015-10-27 2016-01-06 佛山百能堡科技有限公司 一种定量电磁泵
CN107084109A (zh) * 2017-07-03 2017-08-22 广东百能堡科技有限公司 一种具有阀结构的电磁计量泵
WO2020115776A1 (fr) * 2018-12-03 2020-06-11 Ceme S.P.A. Pompe pour doser un fluide

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4205290A1 (de) * 1992-02-21 1993-08-26 Thomas Technik Kg Ges Fuer Mag Elektromagnetisch betriebene pumpe
DE29919575U1 (de) * 1999-11-08 2000-08-31 Agf Pumpen Und Fluessigkeitste Flüssigkeitspumpe nach dem Schwingkolben/Ankerprinzip
DE10103224C5 (de) * 2001-01-25 2006-01-26 J. Eberspächer GmbH & Co. KG Dosierpumpanordnung und diese enthaltendes Dosierpumpsystem

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008013440A1 (de) * 2008-03-10 2009-09-17 Thomas Magnete Gmbh Magnetbetätigte Hubkolbenpumpe mit hydraulischer Dämpfung
DE102008055611A1 (de) * 2008-11-03 2010-05-06 Thomas Magnete Gmbh Hubkolbenpumpe
DE102008055611B4 (de) * 2008-11-03 2010-09-16 Thomas Magnete Gmbh Hubkolbenpumpe
US9464628B2 (en) 2010-03-26 2016-10-11 Thomas Magnete Gmbh Pump
CN103562511A (zh) * 2011-05-05 2014-02-05 罗伯特·博世有限公司 尤其是用于操作泵的电磁的操作装置
CN103562511B (zh) * 2011-05-05 2016-03-16 罗伯特·博世有限公司 尤其是用于操作泵的电磁的操作装置
USD907183S1 (en) 2016-11-23 2021-01-05 Dometic Sweden Ab Air conditioning apparatus
US11772452B2 (en) 2017-11-16 2023-10-03 Dometic Sweden Ab Air conditioning apparatus for recreational vehicles
USD905217S1 (en) 2018-09-05 2020-12-15 Dometic Sweden Ab Air conditioning apparatus
USD944374S1 (en) 2018-09-05 2022-02-22 Dometic Sweden Ab Air conditioning apparatus

Also Published As

Publication number Publication date
DE502005005266D1 (de) 2008-10-16
EP1748188A1 (fr) 2007-01-31

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