EP1857673B1 - Pompe de dosage, en particulier destinée à l'approvisionnement de carburant pour un appareil de chauffage de véhicule - Google Patents
Pompe de dosage, en particulier destinée à l'approvisionnement de carburant pour un appareil de chauffage de véhicule Download PDFInfo
- Publication number
- EP1857673B1 EP1857673B1 EP07009643.3A EP07009643A EP1857673B1 EP 1857673 B1 EP1857673 B1 EP 1857673B1 EP 07009643 A EP07009643 A EP 07009643A EP 1857673 B1 EP1857673 B1 EP 1857673B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- bottom wall
- pump chamber
- inlet
- 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
Links
- 239000000446 fuel Substances 0.000 title claims description 9
- 238000010438 heat treatment Methods 0.000 title claims 2
- 238000005086 pumping Methods 0.000 title 1
- 230000002093 peripheral effect Effects 0.000 description 11
- 238000013016 damping Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
Images
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
- F04B17/046—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
Definitions
- the present invention relates to a metering pump, in particular for conveying fuel for a vehicle heater, comprising a pump piston which can be moved back and forth in a housing which provides a pump chamber, the housing providing a circumferential wall bounding the pump chamber and leading to the pump piston, and a bottom wall, further comprising an inlet flow region opening into the pump chamber via at least one inlet port and an outlet flow region leading away from the pump chamber via at least one outlet port.
- a metering pump is in Fig. 1 shown.
- This metering pump generally designated 10 serves, for example, to receive fuel from a fuel tank and to convey it to the burner area of a vehicle heater.
- a pump piston 12 which is fixedly connected to an armature 14, in a generally designated 16 housing in the direction of a pump longitudinal axis L back and forth.
- the housing 16 comprises a substantially cylindrical first housing part 18, which also essentially provides a peripheral wall 20, and further comprises a second housing part 22 which is inserted at an axial end portion in the first housing part 18 and essentially also provides a bottom wall 24 ,
- the two housing parts 18, 22 or the peripheral wall 20 and the bottom wall 24 define a pump chamber 26, the volume of which can be increased by the reciprocating movement of the pump piston 12 for receiving fuel to be conveyed from an inlet flow area generally designated 28 and for discharging fuel to an outlet flow area generally indicated at 30.
- the inlet flow region 28 is open to the pump chamber 26 via two inlet openings 32 provided in the circumferential wall 20.
- the outlet flow region 30 is open to the pump chamber 26 via an outlet opening 34 formed in the second housing part 22 and thus provided in the bottom wall 24.
- the second housing part 22 further forms a valve seat for a check valve 36, which, when the pump piston 12 is to increase the volume of the pump chamber 26 in the illustration of Fig. 1 moves to the right, ie in the direction away from the bottom wall 24, prevents backflow of fuel pumped from the pump chamber 26 into the outlet flow region 30.
- the pump piston 12 is moved by the magnetic interaction of the fixedly connected thereto armature 14 and an electromagnetic coil 38.
- the design is such that upon excitation of the solenoid 38, the armature 14 and thus also the piston 12 fixedly connected thereto in the direction of reduction of the volume of the pump chamber 26, ie in Fig. 1 is shifted to the left and on the bottom wall 24, while at the end of the excitement, a biasing spring 40 which acts between the armature 14 and the first housing part 18, the armature 14 and thus also the piston 12 in the opposite direction, ie in the direction of the bottom wall 24 away and to increase the volume of the pump chamber shifts.
- an elastic damping element 42 is provided on the bottom wall 24, which has a central opening corresponding to the outlet opening 34 and a movement stop for forms the pump piston 12 during a delivery or discharge stroke.
- Dosing pumps which have in a housing a limited by a peripheral wall and a bottom wall pump chamber into which an inlet opening and an outlet opening.
- a pump piston reciprocable in the housing is guided by an inner peripheral wall of a sleeve.
- a metering pump according to the preamble of claim 1 is also known from the document EP 1 555 433 A2 known.
- a metering pump in particular for conveying fuel for a vehicle heater, comprising a pump piston which can be moved back and forth in a housing providing a pump chamber, wherein the housing has a peripheral wall bounding the pump chamber and leading to the pump piston and a bottom wall and further comprising an inlet flow area opening into the pump chamber via at least one inlet opening and an outlet flow area leading away from the pump chamber via at least one outlet opening.
- the at least one outlet opening is provided in the peripheral wall at a distance from the bottom wall.
- the at least one outlet opening is therefore not provided in the bottom wall but in the peripheral wall and furthermore at a distance from the bottom wall in the metering pump according to the invention.
- a blind-hole-like volume region is created between this at least one outlet opening and the bottom wall. If the pump piston moves toward the bottom wall for ejecting medium to be conveyed beyond the at least one outlet opening, this leads to the fact that the part of the medium to be conveyed in this blind-hole-like volume area is due to the fact that it from this volume range can no longer escape, is increasingly compressed.
- the pump piston can therefore not come into direct physical contact with the bottom wall, so that impact noise can be avoided and the use of enclosed in this volume range to be conveyed medium a damping function is obtained, which makes the provision of additional damping elements redundant, but nevertheless a gentle delay of the Pump piston causes.
- a plurality of outlet openings are provided at substantially the same distance from the bottom wall.
- the at least one inlet opening is provided in the peripheral wall.
- the electromagnetic coil 38 carries. In its other axial end region, the electromagnetic coil 38 is in communication with a housing end portion 46, which in turn carries an inlet port 48 for connection to a supply line. In the housing end portion 46, a central opening 50 is provided which, in conjunction with the volume area enclosed by the housing end portion 46, the electromagnetic coil 38 and the outer housing 44, substantially forms the inlet flow area 28.
- This inlet flow area 28 is as shown in FIG Fig. 3 clearly recognizes, via two with respect to the pump longitudinal axis L diametrically opposite and formed in the peripheral wall 20 inlet openings 32 to the pump chamber 26 through open or flows through these openings 32 in the pump chamber 26 a.
- two outlet openings 34 are further diametrically opposite each other with respect to the pump longitudinal axis L and arranged in the peripheral wall 20 with an angular offset of 90 ° to the inlet openings 32.
- the outlet openings 34 have to the provided by the second housing part 22 bottom wall 24 an axial, so measured in the direction of movement of the pump piston 12 distance A, this distance A here as between the bottom wall 24 and the bottom wall 24 closest to the end of the Outlet openings 34 measured distance is defined.
- the outlet flow region 30 comprises, away from the outlet openings 34, a volume region 52 formed between the first housing part 18 and also the second housing part 22 and the outer carrier housing 44, a plurality of, for example, cross or star-shaped, and for example corresponding projections 54 Radial openings 56 provided on the second housing part 22 and the flow volume area 60 provided in a valve seat body 58 or even further on this valve seat body 58, for example also provided in an outlet connection 62.
- the distance H between the complete closing of the inlet openings 32 and the complete closing of the outlet opening 34 or the corresponding stroke H then defines the ejected volume of the medium to be conveyed during each delivery stroke, assuming that in the phase in which the inlet openings 32 are not yet are closed due to the final effect of the check valve 36 in the pump chamber 26 still contained medium to be conveyed is first forced back into the inlet flow area via the inlet openings 32.
- the ejection of medium to be funded stops until the end face 68 of the pump piston 12, the in Fig. 3 achieved with dash-dot line drawn positioning, in which the outlet openings 34 are completely covered by the pump piston 12.
- a volume region 70 is formed between the end face 68 of the pump piston 12 and the bottom wall 24 or the section of the circumferential wall 20 which is also in this region and has no opening leading to it or away from it. That is, in this volume region 70 trapped medium to be conveyed, which was previously contained in the pump chamber 26, but was not expelled via the outlet openings 34, 12 is increasingly compressed with continued movement of the pump piston 12 and prevents the pump piston 12 with its end face 68 strikes against the bottom wall 24. This trapped in the volume range 70 to be conveyed medium thus ensures a gradual, bumpless braking of Pumpenkoplbens 12, even with further continued energization of the electromagnetic coil 38.
- the excitation of the electromagnetic coil 38 is completed, so relaxes the trapped in the volume range 70 medium because the pump piston 12 will again move away from the bottom wall 24 following the biasing action of the spring 40.
- This movement is still assisted by the relaxing medium enclosed in the volume region 70, since it was actually compressed from the beginning of the state in which the volume region 70 was completely closed. It can thus also the occurrence of a suction effect or negative pressure effect, which would hinder the return movement of the pump piston 12, be avoided.
- the pump piston 12 then initially releases the outlet openings 34, wherein due to the provision of the check valve arrangement 36, the backflow of medium to be delivered which has already been ejected via the outlet openings 34 is prevented. From the time at which the inlet openings 32 are released again, the medium to be conveyed from the inlet flow region 28 can then enter the pump chamber 26 again due to the occurring suction effect and possibly assisted by an overpressure.
- a movement limit for a pump piston in the delivery stroke so when ejecting medium to be conveyed from a pump chamber to provide.
- the medium to be conveyed enclosed in a completely enclosed volume region forms the damping assembly in which, with its inherent compressibility, it ensures a gradual and impact-free deceleration of the pump piston.
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)
- Details Of Reciprocating Pumps (AREA)
Claims (5)
- Une pompe de dosage, en particulier pour transporter du carburant destiné à un dispositif de chauffage d'un véhicule, comprenant un piston de pompe (12) qui peut se déplacer en va et vient dans un boîtier (16) prévoyant une chambre de pompe (26), le boîtier (16) prévoyant paroi circonférentielle (20) définissant la chambre de pompe (26) et guidant le piston de pompe (12) et une paroi de fond (24), comprenant en outre une zone d'alimentation d'entrée (28) qui débouche par au moins une ouverture d'entrée (32) dans la chambre de pompe (26) et une zone d'alimentation de décharge (30) qui s'éloigne de la chambre de pompe (26) par au moins une ouverture de décharge (34),
caractérisée par ladite au moins une ouverture de décharge (34) étant prévue dans la paroi circonférentielle (20) à distance de la paroi de fond (24). - La pompe de dosage selon la revendication 1,
caractérisée par plusieurs ouvertures de décharge (34) étant prévues substantiellement à la même distance de la paroi de fond (24). - La pompe de dosage selon la revendication 1 ou 2,
caractérisée par ladite au moins une ouverture d'entrée (32) étant prévue dans la paroi circonférentielle (20). - La pompe de dosage selon la revendication 3,
caractérisée par ladite au moins une ouverture d'entrée (32) étant prévue à une distance plus grande par rapport à la paroi de fond (24) que ladite au moins une ouverture de sortie (34). - La pompe de dosage selon la revendication 4,
caractérisée par plusieurs ouvertures d'entrée (32) étant prévues à substantiellement la même distance par rapport à la paroi de fond (24).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL07009643T PL1857673T3 (pl) | 2006-05-18 | 2007-05-14 | Pompa dozująca, zwłaszcza do podawania paliwa do urządzenia grzejnego pojazdu |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006023492A DE102006023492A1 (de) | 2006-05-18 | 2006-05-18 | Dosierpumpe, insbesondere zum Fördern von Brennstoff für ein Fahrzeugheizgerät |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1857673A1 EP1857673A1 (fr) | 2007-11-21 |
EP1857673B1 true EP1857673B1 (fr) | 2013-07-17 |
Family
ID=38556689
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07009643.3A Active EP1857673B1 (fr) | 2006-05-18 | 2007-05-14 | Pompe de dosage, en particulier destinée à l'approvisionnement de carburant pour un appareil de chauffage de véhicule |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1857673B1 (fr) |
DE (1) | DE102006023492A1 (fr) |
PL (1) | PL1857673T3 (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008013441B4 (de) * | 2008-03-10 | 2010-10-14 | Thomas Magnete Gmbh | Dosierpumpe |
DE102008013440A1 (de) * | 2008-03-10 | 2009-09-17 | Thomas Magnete Gmbh | Magnetbetätigte Hubkolbenpumpe mit hydraulischer Dämpfung |
DE102008055611B4 (de) * | 2008-11-03 | 2010-09-16 | Thomas Magnete Gmbh | Hubkolbenpumpe |
DE102015007465A1 (de) * | 2015-06-09 | 2016-12-15 | Thomas Magnete Gmbh | Hubkolbenpumpe mit eingangsseitiger Förderstrombegrenzung und Verfahren zum Betrieb der Hubkolbenpumpe |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1826051U (de) * | 1958-07-12 | 1961-02-02 | Medo App Ges M B H & Co | Dosierpumpe fuer kleine foerdermengen leicht verdampfender fluessigkeiten. |
DE7525932U (de) * | 1975-08-16 | 1976-04-22 | Adamaszek Geb. Reumann, Christa, 7000 Stuttgart | Mehrfachdosier-kolbenpumpe mit regulierbarem ausstossdruck |
DE4205290A1 (de) * | 1992-02-21 | 1993-08-26 | Thomas Technik Kg Ges Fuer Mag | Elektromagnetisch betriebene pumpe |
JP3767268B2 (ja) * | 1999-09-10 | 2006-04-19 | 三菱電機株式会社 | 高圧燃料供給装置 |
JP3823060B2 (ja) * | 2002-03-04 | 2006-09-20 | 株式会社日立製作所 | 高圧燃料供給ポンプ |
DE102004002454B4 (de) * | 2004-01-16 | 2006-06-29 | J. Eberspächer GmbH & Co. KG | Dosierpumpsystem und Verfahren zum Betreiben einer Dosierpumpe |
DE102004002489B4 (de) * | 2004-01-17 | 2013-01-31 | Robert Bosch Gmbh | Fluidpumpe, insbesondere Kraftstoff-Hochdruckpumpe |
DE102004049171A1 (de) * | 2004-10-08 | 2006-04-13 | J. Eberspächer GmbH & Co. KG | Dosierpumpe insbesondere Kraftstoffdosierpumpe für ein Fahrzeugheizgerät oder ein Reformersystem |
DE502005005266D1 (de) * | 2005-07-29 | 2008-10-16 | Truma Geraetetechnik Gmbh & Co | Dosierpumpe |
-
2006
- 2006-05-18 DE DE102006023492A patent/DE102006023492A1/de not_active Ceased
-
2007
- 2007-05-14 PL PL07009643T patent/PL1857673T3/pl unknown
- 2007-05-14 EP EP07009643.3A patent/EP1857673B1/fr active Active
Also Published As
Publication number | Publication date |
---|---|
EP1857673A1 (fr) | 2007-11-21 |
PL1857673T3 (pl) | 2013-12-31 |
DE102006023492A1 (de) | 2007-11-22 |
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