EP1445485A2 - Pompe de dosage pour dispositif de chauffage pour véhicule - Google Patents

Pompe de dosage pour dispositif de chauffage pour véhicule Download PDF

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Publication number
EP1445485A2
EP1445485A2 EP04000552A EP04000552A EP1445485A2 EP 1445485 A2 EP1445485 A2 EP 1445485A2 EP 04000552 A EP04000552 A EP 04000552A EP 04000552 A EP04000552 A EP 04000552A EP 1445485 A2 EP1445485 A2 EP 1445485A2
Authority
EP
European Patent Office
Prior art keywords
piston
displacement
chamber
inlet chamber
volume
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
Application number
EP04000552A
Other languages
German (de)
English (en)
Other versions
EP1445485B1 (fr
EP1445485A3 (fr
Inventor
Michael Humburg
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.)
Eberspaecher Climate Control Systems GmbH and Co KG
Original Assignee
J Eberspaecher 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 J Eberspaecher GmbH and Co KG filed Critical J Eberspaecher GmbH and Co KG
Publication of EP1445485A2 publication Critical patent/EP1445485A2/fr
Publication of EP1445485A3 publication Critical patent/EP1445485A3/fr
Application granted granted Critical
Publication of EP1445485B1 publication Critical patent/EP1445485B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • F04B13/00—Pumps specially modified to deliver fixed or variable measured quantities

Definitions

  • the present invention relates to a metering pump device for a vehicle heater.
  • Heaters used in motor vehicles for example as auxiliary heaters or can be effective as an auxiliary heater, are generally used with run on the same fuel as one in such a vehicle provided drive unit. It is therefore necessary to have one Heater, depending on the required heating output, a correspondingly adapted Add fuel quantity or fuel quantity. This will generally Dosing pumping devices used that are able to do this need, comparatively small amounts of fuel in precisely metered manner and Way to deliver to the heater to contain the combustion in the required Way, i.e. especially with minimal emissions, to expire.
  • a metering pump arrangement in which a pump piston can be moved back and forth in a pump chamber.
  • this pump chamber is either with a fuel supply area or connected to a fuel discharge area so that for example when the pump chamber is connected to the fuel supply area and when pulling back the pump piston by enlarging of the pump chamber volume, fuel is introduced into the pump chamber and in a subsequent work cycle after connecting the pump chamber with the fuel discharge area and pushing back the pump piston into the pump chamber by reducing the volume of the same the fuel is delivered.
  • This mode of operation has the consequence that, for example only for every second stroke of the pump piston to take up or suction of fluid to be pumped into the pump chamber is effective and in a corresponding manner only at every second stroke to deliver the previously ingested fluid is effective.
  • An electromagnetically operated pump is known from DE 42 05 290 A1, in which a displacement piston element periodically between a position in which the volume of an inlet chamber is minimal, and a position in which the volume of an outlet chamber is minimal is movable back and forth.
  • the change in volume of the inlet chamber or outlet chamber is obtained in that a piston section of the Displacement piston element is guided in a cylinder housing and more or less immersed in it. Because of that in the cylinder housing displaceable and more or less far into this plunging piston section has a constant external cross-section over its length, results in displacement of the displacement piston element, that the volume of the inlet chamber and the volume of the outlet chamber change to the same extent.
  • the first valve arrangement is provided inside the piston section and thus back and forth movable here. When moving to minimize the volume of the inlet chamber this displaced fluid first enters an interior area of the piston section and leaves it through passage openings towards the remaining volume area of the outlet chamber.
  • a Dosing pump device for a vehicle heater comprising an inlet chamber, an outlet chamber, a first valve arrangement between the Inlet chamber and the outlet chamber, which a fluid exchange in the Allows only from the inlet chamber to the outlet chamber Displacement piston element, which between a first piston position, in which it minimizes the volume of the inlet chamber, and in one second piston position, in which it is the volume of the outlet chamber minimized, is movable, with movement of the displacement piston element a decrease in volume from the first piston position to the second piston position of the inlet chamber is greater than an increase in volume of the Outlet chamber is.
  • An essential feature of the metering pump device is that these two chambers separated by a first valve arrangement has, and that by the displacement piston element, depending on the direction of movement or movement clock, either the volume of the inlet chamber or the volume of the outlet chamber is minimized. It follows but that whenever, for example, the displacement piston element reaches the second piston position, that is, in a certain position Direction of movement or a specific movement mode, this volume of the outlet chamber is minimized and thereby to be promoted Fluid is expelled from this outlet chamber. The same applies in the opposite direction of movement, with which every movement in this direction or in this mode the volume of the Inlet chamber is minimized and due to the action of the first valve assembly fluid to be pumped from the inlet chamber to the outlet chamber is transmitted.
  • the structure of the metering pump device according to the invention can, for example be such that in the first piston position the displacement piston element with a first piston area immersed in the inlet chamber and in the second piston position the displacement piston element immersed in the outlet chamber with a second piston region.
  • the different changing of the volume of the inlet chamber and the volume the outlet chamber when the displacement piston element moves, that ultimately both volume changes due to its movement induced, for example, can be obtained in that the displacement piston element in a first piston region Movement of the displacement piston element in the direction of the first piston position has effective first displacement surface and in a second Piston area in when the displacement piston element moves Direction to the second piston position effective second displacement surface and that the first displacement area is larger than the second Displacement surface.
  • an equalization of the outward fluid flow in Direction to a continuous or quasi-continuous fluid flow can be supported by the fact that the first displacement surface and the second displacement area to each other has an area ratio of 2: 1 exhibit.
  • the displacement piston element one the first piston area and the second piston area providing piston section and a displacement section, which when moving the displacement piston element from the immerses the first piston position to the second piston position in the outlet chamber.
  • a particularly simple construction can provide that the displacement piston element between the first piston position and the second Piston position is displaceable.
  • the displacement piston element in a piston housing with a cylindrical Opening is displaceable, the area in the piston housing the inlet chamber in which the first piston region in the first Piston position immersed, and the area of the outlet chamber in which the second piston area is immersed in the second piston position, at least are partially trained.
  • the piston housing at least partially from is surrounded by a chamber housing and that the inlet chamber or / and the outlet chamber at least partially between the piston housing and the chamber housing is formed.
  • Fluid supply line is provided, which on the first piston area Has mouth to the inlet chamber and by a second valve arrangement is lockable, which is essentially only a fluid exchange from the fluid supply line to the inlet chamber.
  • the first valve arrangement or / and the second valve arrangement is designed as a check valve.
  • the first valve arrangement or / and the second valve arrangement has a spring-biased valve member.
  • Electromagnetically effective drive can be provided, for example may include a coil / armature arrangement in which the armature passes through the displacement piston element is formed.
  • the present invention relates to a metering pump device for a vehicle heater, comprising an inlet chamber an outlet chamber, a first valve arrangement between the inlet chamber and the outlet chamber, which fluid exchange in the Allows only from the inlet chamber to the outlet chamber Displacement piston element, which in a first piston position Volume of the inlet chamber minimized and in a second piston position minimizes the volume of the outlet chamber with the first valve assembly comprises a valve seat and a valve member which can be pressed against the valve seat, wherein the valve seat of the first valve arrangement on a the displacement piston element receiving housing is provided.
  • FIG. 1 shows a metering pump device 10 according to the invention in longitudinal section, cut along a longitudinal center line of a generally designated 12 Displacement piston element, shown.
  • the dosing pump device 10 comprises a piston housing 14 in which one is stepped trained, essentially cylindrical in the direction of the longitudinal axis L. extending opening 16 is provided.
  • At an end region 18 of the Piston housing 14 is in the opening 16 or the section 20 with the smaller diameter of the same, engagingly positioned and attached to it fixed inlet connector element 22 is formed with an inlet opening 24.
  • This inlet connector element 22 can, for example, via a Hose line or the like can be connected to a fuel reservoir.
  • the diameter of the displacement piston element 12 is also corresponding stepped and has a portion 28 with less Diameter on, and a section 30 with a larger diameter.
  • the dimension of the section 28 is smaller Diameter adapted to the section 20 of the opening 16, and in the section 30 of the Displacement piston element 12 to section 26 of opening 16 adjusted so that in the two opening sections 20, 26 Displacement piston element 12 is guided with a very precise fit.
  • section 30 of displacement piston element 12 it is possible, for example, on section 30 of displacement piston element 12 on the latter Outer circumference of sealing elements, e.g. Sealing rings or the like, provided.
  • Coil 32 forms part of an electromagnetically active drive 34.
  • the displacement piston element 12, with its section 28, forms the area immersed in the coil 32, an armature 36.
  • the Coil 32 is generated by the electromagnetic interaction that arises the displacement piston element 12 against the action of a Preload spring 34 from the piston position shown in FIG. 1 upwards in Moved towards the inlet connector element 22.
  • the biasing spring 34 which is designed, for example, as a helical compression spring can be at the step-like transition between the sections 20, 26 of the opening 16 on the one hand and at the step-like transition between the sections 28 and 30 of the displacement piston element 12 on the other hand from. If the excitation of the coil 32 is stopped or reduced, then under the biasing action of this biasing spring 34, the displacement piston element 12 again moved into the piston position shown in Fig. 1.
  • This inlet chamber 40 includes a first inlet chamber region 42 that is substantially provided at the axial end region 44 of the piston housing 14 and is provided there by section 26 of opening 16.
  • a second inlet chamber area 46 comprises at least one, preferably several after radially outer openings 48 in the end region 44 of the piston housing 14.
  • a third inlet chamber area 50 comprises a substantially cylindrical, ring-shaped volume region 52 between the Piston housing 14 and chamber housing 38.
  • an outlet chamber generally designated 54.
  • This opening or openings 60 and the outlet chamber area 58 are radially inward to the section 26 of the opening 14 in the piston housing 14 open, in one to the stepped transition between the sections 20 and 26 formed area the same in which the bias spring 34 is received.
  • This volume area of the opening section 26 forms another Outlet chamber area 62.
  • the metering pump device 10 Via one provided on the chamber housing 38 or integrally formed outlet port 64, the metering pump device 10 to a device to be supplied, for example a Vehicle heater, can be connected.
  • a first valve arrangement 66 comprises an annular valve member 68 which under the bias of another bias spring 70 on both formed on the piston housing 14 and on the chamber housing 38 step-like transition between the outlet chamber region 56 and the Inlet chamber area 50 rests.
  • this constitutes a check valve trained first valve assembly 66 ensures that fluid flow in the Essentially only from the inlet chamber area 50 to the outlet chamber area 56 can take place, and not vice versa.
  • the same extending supply line 72 is formed.
  • this feed line 72 is at section 36 of the Displacement piston element 12 to the opening section 20 of the opening 16 in the piston housing 14 and thus also to the inlet opening 24 of the inlet connector element 22 open.
  • At section 30 of the Displacement piston element 12 opens this feed line 72 to the inlet chamber 40.
  • the supply line 72 is at this mouth region 74 lockable by a second valve arrangement 76.
  • This second valve arrangement 76 comprises a disk-shaped valve member 78 which is located below the biasing effect of a further biasing spring 80 against one a step-like expansion transition of the supply line 72 Opening formed in the displacement piston element 12 valve seat 82 is biased, with the spring 80 on one with the displacement piston element 12 connected support element 84 supports.
  • This second valve arrangement 76 thus ensures that a fluid flow of the fluid supply line 72 in the direction of the inlet chamber 40 is possible, while fluid flow in the opposite direction is not possible.
  • FIGS. 1-4 The mode of operation of FIGS. 1-4 is described below previously mainly with reference to FIGS. 1 and 2 in terms of their constructive Dosing pump device 10 described in detail.
  • the displacement piston element 12 is in a first piston position, in which it is held by the biasing action of the biasing spring 34 is.
  • the displacement piston element is immersed 12 with a piston area 86 to the maximum extent into the inlet chamber 40 so that the inlet chamber area 42 essentially completely from the piston region 86 of the displacement piston element 12 is filled and thus the total volume of the inlet chamber 40 is minimized.
  • the displacement piston element 12 Starting from a state in which the displacement piston element 12 is in its first piston position and the volume of the inlet chamber 40 is minimal, while the volume of the outlet chamber 54 is maximum, the displacement piston element 12 by excitation the coil 32 against the biasing action of the biasing spring 34th displaced, it does not take from the displacement piston element 12 occupied volume of the inlet chamber 40 while at the same time the displacement piston element 12 with a second piston area 88 increasingly moves into the outlet chamber area 58, in which also the increasingly compressing in this movement process Preload spring 34 is arranged. In this process, the total volume the outlet chamber 54, which is not by the displacement piston member 12 is occupied and arranged in the fluid to be pumped can be reduced until in the state recognizable in FIG. 3, in which the displacement piston element 12 in a second piston position is, this volume is minimized. During this movement, the displacement piston element displaces 12 with an effective as displacement surface 89 axial face of section 30 fluid from the outlet chamber area 62nd
  • the inlet connector element 22 When moving into this second piston position 12, the inlet connector element 22 a movement stop for the displacement piston element Form 12, preferably before the biasing spring 34 completely compressed and thus set to block.
  • the volume available for fluid absorption of the inlet chamber 40 enlarged, while that for fluid intake for Available volume of the outlet chamber 54 is reduced.
  • valve member 78 conditioned designed by the mode of operation of the two as check valves Valve assemblies 66, 76 is made during this transition
  • Lifting the valve member 78 from its associated valve seat 82 fluid can flow into the inlet chamber 40 from the feed line 72 while by the biasing action of the biasing spring 70 on the one hand and the Increase in pressure in outlet chamber 54 by decreasing volume the same, on the other hand, the valve member 68 reinforced against its Valve seat 90 pressed on piston housing 14 and on chamber housing 38 becomes.
  • Piston region 88 ends the excitation of the coil 32, returns, as in FIG. 4 illustrates the displacement piston element 12 back towards it first piston position back. That is, the first piston area 86 again increasingly immerses into the inlet chamber area 42 while the second piston area 88 more and more from the outlet chamber area 58 is pulled out. So there is a reduction in the Volume of available volume of the inlet chamber 40 while at the same time that available for fluid absorption Volume of the outlet chamber 54 increases. Suppressed in this movement the displacement piston element 12 with its section 30 or a displacement surface 87 initially in the inlet chamber area 42 contained fluid.
  • the ratio of Volume change of the inlet chamber 40 to change the volume of the Outlet chamber 54 is defined by the ratio of the size of the displacement area 87 to the size of the displacement surface 89, that is to say at the respective movement effective displacement surface.
  • FIGS and 6 An alternative embodiment of one according to the principles of the present The metering pump device constructed according to the invention is shown in FIGS and 6 shown.
  • Components described above Components in terms of structure and function correspond to the the same reference numerals with the addition of an appendix "a".
  • the displacement piston element 12a initially held in a position of maximum inlet chamber volume in FIG. 5 moves in a direction to reduce the volume of the inlet chamber 40a, the volume of the inlet chamber 40a decreases while at the same time the volume of the outlet chamber 54a increases.
  • the displacement piston element 12a moves so far that its piston region 86a comes to rest against a stop 94a, for example again under the tension of a spring (not shown), the volume of the inlet chamber 40a changes according to the intended stroke multiplied by the size of the displacement surface 87a by a size V 1 .
  • the volume of the outlet chamber 54a changes by a volume V 2 , which results from the stroke of the displacement piston element 12a already mentioned above multiplied by the size of the displacement surface 89a.
  • the same effect occurs here that the volume V 1 displaced from the inlet chamber 40a cannot be completely absorbed in the outlet chamber 54a, the volume of which has only increased by the size V 2 . That is, the volume fraction of the displaced fluid that cannot be accommodated in the outlet chamber 54a is discharged to the outside.
  • a ventilation opening 96a may be provided, which the entry or escape of air into the opening 16a of the Piston housing 14a allows.
  • Dosing pump device recognizes that each stroke of the Displacement piston element leads to an exhaust stroke. This means at predetermined movement frequency of the displacement piston element a Doubling of the delivery frequency compared to that from the prior art Technology known metering pump arrangement with a corresponding clearly more uniform flow characteristics of the conveyed to a heater Fuel.
  • the metering pump device has only one Appropriate control to move organ on what is building simplified and the number of required components reduced. Furthermore is in particular by passing the fluid supply through the displacement piston element 12 provided a very compact structure, and it there is no movable component to be sealed from the outside.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Reciprocating Pumps (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)
  • Air-Conditioning For Vehicles (AREA)
EP04000552A 2003-01-14 2004-01-13 Pompe de dosage pour dispositif de chauffage pour véhicule Expired - Lifetime EP1445485B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10301093A DE10301093A1 (de) 2003-01-14 2003-01-14 Dosierpumpeinrichtung für ein Fahrzeugheizgerät
DE10301093 2003-01-14

Publications (3)

Publication Number Publication Date
EP1445485A2 true EP1445485A2 (fr) 2004-08-11
EP1445485A3 EP1445485A3 (fr) 2005-09-07
EP1445485B1 EP1445485B1 (fr) 2007-06-06

Family

ID=32519943

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04000552A Expired - Lifetime EP1445485B1 (fr) 2003-01-14 2004-01-13 Pompe de dosage pour dispositif de chauffage pour véhicule

Country Status (3)

Country Link
US (1) US7322804B2 (fr)
EP (1) EP1445485B1 (fr)
DE (2) DE10301093A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005044904B4 (de) * 2005-09-14 2009-12-03 Hirschmann, Karl-Heinz, Prof.Dr. Elektromagnetisch betreibbare Dosierpumpe
JP5034705B2 (ja) * 2007-06-18 2012-09-26 株式会社アドヴィックス ピストンポンプ
US8550794B2 (en) * 2010-08-09 2013-10-08 Foothill Land, Llc Double acting fluid pump
DE102011008086A1 (de) * 2011-01-07 2012-07-12 Inficon Gmbh Doppeltwirkender Kältemittelkompressor
US9528505B2 (en) * 2014-02-10 2016-12-27 Haier Us Appliance Solutions, Inc. Linear compressor
US9562525B2 (en) * 2014-02-10 2017-02-07 Haier Us Appliance Solutions, Inc. Linear compressor
JP6253623B2 (ja) * 2015-09-14 2017-12-27 本田技研工業株式会社 燃料遮断弁
DE102015116783A1 (de) * 2015-10-02 2017-04-06 Eberspächer Climate Control Systems GmbH & Co. KG Dosierpumpe, insbesondere Brennstoffdosierpumpe für ein Fahrzeugheizgerät
CA3019194A1 (fr) 2016-03-30 2017-10-05 Marine Canada Acquisition Inc. Appareil de chauffage de vehicule et commandes associees
JP7051412B2 (ja) * 2017-12-13 2022-04-11 Ｎｉｔｔｏｋｕ株式会社 プランジャポンプ
EP4105480B1 (fr) * 2021-06-17 2024-03-06 Safran Landing Systems UK Ltd Pompe à fluide piézo-électrique
US12442364B2 (en) * 2023-12-11 2025-10-14 Aperia Technologies, Inc. Two-stage pump and method of operation

Family Cites Families (11)

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Publication number Priority date Publication date Assignee Title
US3809507A (en) * 1972-03-01 1974-05-07 B Baglai Nonpulsating fluid-flow pump
US4349130A (en) * 1980-03-03 1982-09-14 Woolfolk Chemical Works, Inc. Liquid metering pump
GB2132284B (en) * 1982-12-17 1986-04-03 Commw Scient Ind Res Org Porting and ducting arrangement
GB8522466D0 (en) * 1985-09-11 1985-10-16 British Syphon Ind Plc Liquid dispence system
GB2180301B (en) 1985-09-12 1989-09-20 Crown Technology Corp Variable proportioner
DE4205290A1 (de) * 1992-02-21 1993-08-26 Thomas Technik Kg Ges Fuer Mag Elektromagnetisch betriebene pumpe
DE69535019T2 (de) * 1994-03-11 2007-01-04 Wilson Greatbatch, Ltd. Elektromagnetische pumpe mit geringem vermögen
JP3058412B2 (ja) * 1997-12-30 2000-07-04 エルジー電子株式会社 リニア圧縮機の吐出バルブ装置
US6186118B1 (en) * 1999-11-10 2001-02-13 Delphi Technologies, Inc. Integrated fuel rail and direct injection fuel pump
DE10103224C5 (de) * 2001-01-25 2006-01-26 J. Eberspächer GmbH & Co. KG Dosierpumpanordnung und diese enthaltendes Dosierpumpsystem
WO2003040562A1 (fr) * 2001-11-08 2003-05-15 Wilson Greatbatch Technologies, Inc. Pompe electromagnetique a faible consommation d'energie

Also Published As

Publication number Publication date
EP1445485B1 (fr) 2007-06-06
US7322804B2 (en) 2008-01-29
DE502004004001D1 (de) 2007-07-19
DE10301093A1 (de) 2004-07-22
US20050047941A1 (en) 2005-03-03
EP1445485A3 (fr) 2005-09-07

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