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EP1103717B1 - Pump unit disposed in a surge chamber of a fuel tank of a vehicle - Google Patents

Pump unit disposed in a surge chamber of a fuel tank of a vehicle Download PDF

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Publication number
EP1103717B1
EP1103717B1 EP00125410A EP00125410A EP1103717B1 EP 1103717 B1 EP1103717 B1 EP 1103717B1 EP 00125410 A EP00125410 A EP 00125410A EP 00125410 A EP00125410 A EP 00125410A EP 1103717 B1 EP1103717 B1 EP 1103717B1
Authority
EP
European Patent Office
Prior art keywords
pump
fuel
surge chamber
chamber
ejector
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.)
Expired - Lifetime
Application number
EP00125410A
Other languages
German (de)
French (fr)
Other versions
EP1103717A1 (en
Inventor
Helmut Kohlhaas
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.)
Siemens AG
Original Assignee
Siemens AG
Siemens Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE10055344A external-priority patent/DE10055344A1/en
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP1103717A1 publication Critical patent/EP1103717A1/en
Application granted granted Critical
Publication of EP1103717B1 publication Critical patent/EP1103717B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/02—Feeding by means of suction apparatus, e.g. by air flow through carburettors
    • F02M37/025—Feeding by means of a liquid fuel-driven jet pump

Definitions

  • the invention relates to a in a surge pot of a fuel tank a motor vehicle arranged conveyor unit, with a to promote fuel to an internal combustion engine the motor vehicle provided fuel pump, with a suction jet pump connected to the fuel pump for pumping fuel from the fuel tank in the swirl pot and with a pump holder for mounting the fuel pump in the swirl pot, wherein the suction jet pump with the pump holder and / or the swirl pot as a structural Unit are designed / is.
  • Such a conveyor unit is for example from WO 88/01346 known.
  • This conveyor unit is a mixing tube the suction jet pump made in one piece with the pump holder.
  • the pump holder has a receptacle for a Nozzle of the suction jet pump.
  • EP 0 694 691 A1 discloses a delivery unit become, in which the nozzle of the suction jet pump in the Swirl pot is used.
  • the mixing tube is integral with made the swirl pot.
  • the suction jet pump can be with the pump holder or the swirl pot to a structural Premount the unit separately from the fuel pump. Maintenance work on the fuel pump are thereby not obstructed by the suction jet pump and make themselves This makes it very easy.
  • the invention is based on the problem of a conveyor unit of the type mentioned above to be designed so that they possible easy to manufacture.
  • the suction jet pump designed and the adjacent components particularly inexpensive.
  • the suction jet pump is divided longitudinally and can therefore be combined with the swirl pot and the pump holder easily in axially demoulding injection molds finished.
  • the suction jet pump can be simply into the dividing plane between baffle pot and pump holder.
  • Feed unit as the pump holder like the Suction jet pump and the swirl pot usually made of art. fabric are made.
  • Feed unit contributes when the at the bottom of the swirl pot fastened pump holder a latching connection with the Fuel pump has. In the simplest case, this can be up a bias of the fuel pump by means of a omitted the lid of the baffle pot supporting arm become.
  • the fuel pump is according to another advantageous Development of the invention reliably in their intended Held position when the pump holder has a circumferential, a lower area of the fuel pump embracing edge and the Latching connection arranged one on the free end of the edge Having radially inwardly facing projection.
  • the delivery unit according to the invention contributes, when a compound the pump holder with the bottom of the swirl pot is designed positively.
  • the suction jet pump could be integral with the pump holder be designed. However, since the suction jet pump has a nozzle and has a spaced from the nozzle mixing tube, this leads to a complicated design of the pump holder.
  • the pump holder can be according to another advantageous development manufacture the invention particularly simple when the Bottom of the swirl pot a portion of a mixing tube having the suction jet pump. For further constructive simplification of the invention Feed unit contributes when the ejector pump positively connected to the pump holder.
  • the suction jet pump could, for example, as in the known Feed unit one in the area of one to the Internal combustion engine leading outlet channel arranged Have branch for the suction jet pump.
  • a higher Pressure required as the ejector pump requires this a costly, arranged in the branch pressure reducing valve.
  • Such a costly pressure reducing valve can be according to another advantageous development simply avoid the invention when the Fuel pump as peripheral pump or side channel pump is formed and if a nozzle of the suction jet pump with a central region of a delivery chamber of the Fuel pump arranged branch is connected. hereby is the branch at a point in the fuel pump arranged, on which independently the intended Pressure setting.
  • the Suction jet pump via its own pumping stage with fuel provided.
  • This additional pumping stage can be in a peripheral pump or side channel pump particularly cost be arranged in an impeller with the main pumping stage.
  • Figure 1 shows one at a bottom of a fuel tank 1 of a motor vehicle arranged swirl pot. 2 with a conveyor unit arranged therein 3.
  • the conveyor unit 3 has one of an electric motor 4 driven Fuel pump 5 and a pump holder 6 for attachment the fuel pump in the swirl pot 2.
  • the pump holder 6 with the bottom portion of the swirl pot 2 bolted and has a locking connection 7 with the fuel pump 5.
  • the locking connection 7 is as of the pump holder 6 protruding and the fuel pump 5 circumferential edge 8 with a radially inwardly facing Projection 9 designed.
  • the projection 9 penetrates into one Well 10 of the fuel pump 5 a.
  • the pump holder 6 is bolted to the bottom portion of the swirl pot 2.
  • the fuel pump 5 is designed as a side channel pump and has a rotating in a pump housing 11 Impeller 12. Furthermore, the fuel pump 5 a from an inlet channel 13 to an outlet channel 14th extending delivery chamber 15. From a middle area the delivery chamber 15 leads a branch 16 to a Suction jet pump 17.
  • the suction jet pump 17 has a the nozzle 16 connected to the branch 16 and one of the nozzle 18 spaced mixing tube 19.
  • the nozzle 18 and the mixing tube 19 are each to one half of the swirl pot. 2 and formed on the other half of the pump holder 6. As a result, both components can be in an axially demoldable Finished injection mold.
  • the area between the mixing tube 19 and the nozzle 18 is via a recess 20 in the bottom area of the swirl pot 2 with the fuel tank 1 connected.
  • a Bottom valve 21 is arranged, through which exclusively Fuel can penetrate into the swirl pot 2.
  • Farther is located in front of the recess 20, a fuel filter 22.
  • the delivery unit can be optionally the fuel pump 5 from the pump holder 6, or the pump holder 6 together with unscrew the fuel pump 5 from the swirl pot 2.
  • the fuel pump 5 sucks fuel through the fine filter 23 from the swirl pot 2 and promotes him over the Outlet 15 to an internal combustion engine, not shown of the motor vehicle. This will get a subset of the fuel via the branch 16 to the nozzle 18 of the Suction jet pump 17.
  • the suction jet pump 17 sucks over the Bottom valve 21 fuel from the fuel tank 1 at and promotes this in the swirl pot 2. For clarification are in the drawing the currents of the fuel marked with arrows. This will ensure that any time fuel in the swirl pot. 2 is available.
  • FIG 2 shows a further embodiment of the in the Swirl pot 2 arranged conveyor unit 29.
  • This conveyor unit 29 differs from that of FIG all the fact that a suction jet pump 24 as a separate Component used in a receptacle 25 of a pump holder 26 is.
  • the pump holder 26 has to hold the Suction jet pump 24 Sealing rings 27.
  • the pump holder 26 via a latching connection 28 at the bottom area the swirl pot 2 attached.
  • FIGS 3a and 3b are different delivery chamber arrangements shown for feeding the suction jet pump.
  • two delivery chambers 15, 15 ' are arranged one behind the other and arranged concentrically with each other in FIG. 3b are.
  • the respective longer delivery chamber 15 has a Inlet 13 to the swirl pot and an outlet 14 to the internal combustion engine of the motor vehicle.
  • the respectively shorter delivery chamber 15 ' has with the inlet 31 a own connection to the swirl pot.
  • Via an outlet 32 is the delivery chamber 15 'with the nozzle of the suction jet pump connected.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

The feed unit has a fuel pump, and a suction jet pump connected to it. The suction jet pump (17), a pump holder (6) for the fuel pump, and/or the surge chamber (2) are formed as a modular unit. The pump holder is located on the floor of the surge chamber, and has snap-in connection (7) for the fuel pump. The chamber floor contains part of a mixer tube (19) of the suction jet pump.

Description

Die Erfindung betrifft eine in einem Schwalltopf eines Kraftstoffbehälters eines Kraftfahrzeuges angeordnete Fördereinheit, mit einer zur Förderung von Kraftstoff zu einer Brennkraftmaschine des Kraftfahrzeuges vorgesehenen Kraftstoffpumpe, mit einer mit der Kraftstoffpumpe verbundenen Saugstrahlpumpe zur Förderung von Kraftstoff aus dem Kraftstoffbehälter in den Schwalltopf und mit einem Pumpenhalter zur Halterung der Kraftstoffpumpe in dem Schwalltopf, wobei die Saugstrahlpumpe mit dem Pumpenhalter und/oder dem Schwalltopf als bauliche Einheit gestaltet sind/ist.The invention relates to a in a surge pot of a fuel tank a motor vehicle arranged conveyor unit, with a to promote fuel to an internal combustion engine the motor vehicle provided fuel pump, with a suction jet pump connected to the fuel pump for pumping fuel from the fuel tank in the swirl pot and with a pump holder for mounting the fuel pump in the swirl pot, wherein the suction jet pump with the pump holder and / or the swirl pot as a structural Unit are designed / is.

Eine solche Fördereinheit ist beispielsweise aus der WO 88/01346 bekannt. Bei dieser Fördereinheit ist ein Mischrohr der Saugstrahlpumpe einstückig mit dem Pumpenhalter gefertigt. Weiterhin hat der Pumpenhalter eine Aufnahme für eine Düse der Saugstrahlpumpe.Such a conveyor unit is for example from WO 88/01346 known. This conveyor unit is a mixing tube the suction jet pump made in one piece with the pump holder. Furthermore, the pump holder has a receptacle for a Nozzle of the suction jet pump.

Weiterhin ist aus der EP 0 694 691 A1 eine Fördereinheit bekannt geworden, bei der die Düse der Saugstrahlpumpe in den Schwalltopf eingesetzt ist. Das Mischrohr ist einstückig mit dem Schwalltopf gefertigt.Furthermore, EP 0 694 691 A1 discloses a delivery unit become, in which the nozzle of the suction jet pump in the Swirl pot is used. The mixing tube is integral with made the swirl pot.

Bei den bekannten Fördereinheiten lässt sich die Saugstrahlpumpe mit dem Pumpenhalter oder dem Schwalltopf zu einer baulichen Einheit getrennt von der Kraftstoffpumpe vormontieren. Wartungsarbeiten an der Kraftstoffpumpe werden hierdurch nicht von der Saugstrahlpumpe behindert und gestalten sich hierdurch sehr einfach. In the known conveyor units, the suction jet pump can be with the pump holder or the swirl pot to a structural Premount the unit separately from the fuel pump. Maintenance work on the fuel pump are thereby not obstructed by the suction jet pump and make themselves This makes it very easy.

Nachteilig bei den bekannten Fördereinheiten ist jedoch, dass die die Saugstrahlpumpe aufnehmenden Bauteile sehr aufwendig zu fertigen sind.A disadvantage of the known conveyor units, however, is that the suction jet pump receiving components very expensive to be finished.

Der Erfindung liegt das Problem zugrunde, eine Fördereinheit der eingangs genannten Art so zu gestalten, dass sie möglichst einfach zu fertigen ist.The invention is based on the problem of a conveyor unit of the type mentioned above to be designed so that they possible easy to manufacture.

Dieses Problem wird erfindungsgemäß dadurch gelöst, dass eine Düse und das Mischrohr der Saugstrahlpumpe geteilt und jeweils zu einer Hälfte in dem Schwalltopf und zur anderen Hälfte in dem Pumpenhalter angeordnet sind oder dass die Saugstrahlpumpe als separates Bauteil in einer Trennebene zwischen Schwalltopf und Pumpenhalter eingesetzt ist.This problem is inventively achieved in that a Divided nozzle and the mixing tube of the suction jet pump and respectively to one half in the bob and the other Half are arranged in the pump holder or that the Suction jet pump as a separate component in a parting plane between baffle and pump holder is used.

Hierdurch gestaltet sich die Fertigung der Saugstrahlpumpe und der daran angrenzenden Bauteile besonders kostengünstig. In der ersten Alternative ist die Saugstrahlpumpe längs geteilt und lässt sich daher zusammen mit dem Schwalltopf und dem Pumpenhalter einfach in axial entformbaren Spritzgussformen fertigen. In der zweiten Alternative lässt sich die Saugstrahlpumpe einfach in die Trennebene zwischen Schwalltopf und Pumpenhalter montieren.As a result, the production of the suction jet pump designed and the adjacent components particularly inexpensive. In the first alternative, the suction jet pump is divided longitudinally and can therefore be combined with the swirl pot and the pump holder easily in axially demoulding injection molds finished. In the second alternative, the suction jet pump can be simply into the dividing plane between baffle pot and pump holder.

Ein weiterer Vorteil dieser Gestaltung ist eine einfache sortenreine Trennung von Materialien bei der Demontage der erfindungsgemäßen Fördereinheit, da der Pumpenhalter wie die Saugstrahlpumpe und der Schwalltopf in der Regel aus Kunst-. stoff gefertigt werden.Another advantage of this design is a simple sorted Separation of materials during disassembly of the invention Feed unit, as the pump holder like the Suction jet pump and the swirl pot usually made of art. fabric are made.

Zur weiteren Vereinfachung der Montage der erfindungsgemäßen Fördereinheit trägt es bei, wenn der am Boden des Schwalltopfes befestigte Pumpenhalter eine Rastverbindung mit der Kraftstoffpumpe hat. Im einfachsten Fall kann hierdurch auf eine Vorspannung der Kraftstoffpumpe mittels eines sich an dem Deckel des Schwalltopfes abstützenden Arms verzichtet werden. To further simplify the assembly of the invention Feed unit contributes when the at the bottom of the swirl pot fastened pump holder a latching connection with the Fuel pump has. In the simplest case, this can be up a bias of the fuel pump by means of a omitted the lid of the baffle pot supporting arm become.

Die Kraftstoffpumpe wird gemäß einer anderen vorteilhaften Weiterbildung der Erfindung zuverlässig in ihrer vorgesehenen Lage gehalten, wenn der Pumpenhalter einen umlaufenden, einen unteren Bereich der Kraftstoffpumpe umgreifenden Rand und die Rastverbindung einen auf dem freien Ende des Randes angeordneten, radial nach innen weisenden Vorsprung aufweist.The fuel pump is according to another advantageous Development of the invention reliably in their intended Held position when the pump holder has a circumferential, a lower area of the fuel pump embracing edge and the Latching connection arranged one on the free end of the edge Having radially inwardly facing projection.

Zur weiteren Vereinfachung der Montage und der Demontage der erfindungsgemäßen Fördereinheit trägt es bei, wenn eine Verbindung des Pumpenhalters mit dem Boden des Schwalltopfes formschlüssig gestaltet ist.To further simplify the assembly and disassembly of the The delivery unit according to the invention contributes, when a compound the pump holder with the bottom of the swirl pot is designed positively.

Die Saugstrahlpumpe könnte einstückig mit dem Pumpenhalter gestaltet sein. Da jedoch die Saugstrahlpumpe eine Düse und ein von der Düse beabstandetes Mischrohr aufweist, führt dies zu einer komplizierten Gestaltung des Pumpenhalters. Der Pumpenhalter lässt sich gemäß einer anderen vorteilhaften Weiterbildung der Erfindung besonders einfach fertigen, wenn der Boden des Schwalltopfes einen Teilbereich eines Mischrohrs der Saugstrahlpumpe aufweist. Zur weiteren konstruktiven Vereinfachung der erfindungsgemäßen Fördereinheit trägt es bei, wenn die Saugstrahlpumpe formschlüssig mit dem Pumpenhalter verbunden ist.The suction jet pump could be integral with the pump holder be designed. However, since the suction jet pump has a nozzle and has a spaced from the nozzle mixing tube, this leads to a complicated design of the pump holder. The pump holder can be according to another advantageous development manufacture the invention particularly simple when the Bottom of the swirl pot a portion of a mixing tube having the suction jet pump. For further constructive simplification of the invention Feed unit contributes when the ejector pump positively connected to the pump holder.

Die Saugstrahlpumpe könnte beispielsweise wie bei der bekannten Fördereinheit einen im Bereich eines zu der Brennkraftmaschine führenden Auslaßkanals angeordneten Abzweig für die Saugstrahlpumpe aufweisen. Da jedoch die Brennkraftmaschine des Kraftfahrzeuges einen höheren Druck erfordert als die Saugstrahlpumpe, erfordert dies ein kostenintensives, in dem Abzweig angeordnetes Druckminderventil. Ein solches kostenintensives Druckminderventil läßt sich gemäß einer anderen vorteilhaften Weiterbildung der Erfindung einfach vermeiden, wenn die Kraftstoffpumpe als Peripheralpumpe oder Seitenkanalpumpe ausgebildet ist und wenn eine Düse der Saugstrahlpumpe mit einem im mittleren Bereich einer Förderkammer der Kraftstoffpumpe angeordneten Abzweig verbunden ist. Hierdurch ist der Abzweig an einer Stelle in der Kraftstoffpumpe angeordnet, an der sich selbständig der vorgesehene Druck einstellt.The suction jet pump could, for example, as in the known Feed unit one in the area of one to the Internal combustion engine leading outlet channel arranged Have branch for the suction jet pump. However, since the Internal combustion engine of the motor vehicle a higher Pressure required as the ejector pump requires this a costly, arranged in the branch pressure reducing valve. Such a costly pressure reducing valve can be according to another advantageous development simply avoid the invention when the Fuel pump as peripheral pump or side channel pump is formed and if a nozzle of the suction jet pump with a central region of a delivery chamber of the Fuel pump arranged branch is connected. hereby is the branch at a point in the fuel pump arranged, on which independently the intended Pressure setting.

In einer weiteren vorteilhaften Ausgestaltung wird die Saugstrahlpumpe über eine eigene Pumpstufe mit Kraftstoff versorgt. Diese zusätzliche Pumpstufe kann in einer Peripheralpumpe oder Seitenkanalpumpe besonders kostengünstig in einem Laufrad mit der Hauptpumpstufe angeordnet sein.In a further advantageous embodiment, the Suction jet pump via its own pumping stage with fuel provided. This additional pumping stage can be in a peripheral pump or side channel pump particularly cost be arranged in an impeller with the main pumping stage.

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

Figur 1
einen unteren Bereich einer erfindungsgemäßen Fördereinheit mit angrenzenden Bereichen eines Kraftstoffbehälters im Längsschnitt,
Figur 2
eine weitere Ausführungsform der erfindungsgemäßen Fördereinheit im Längsschnitt,
Figur 3a, b
verschiedene Ausgestaltungen der Förderkammer für die Speisung der Saugstrahlpumpe.
The invention allows numerous embodiments. To further clarify its basic principle, two of them are shown in the drawing and will be described below. This shows in
FIG. 1
a lower portion of a conveyor unit according to the invention with adjacent regions of a fuel tank in longitudinal section,
FIG. 2
a further embodiment of the conveyor unit according to the invention in longitudinal section,
FIG. 3a, b
Various embodiments of the delivery chamber for the supply of the suction jet pump.

Figur 1 zeigt einen an einem Boden eines Kraftstoffbehälters 1 eines Kraftfahrzeuges angeordneten Schwalltopf 2 mit einer darin angeordneten Fördereinheit 3. Die Fördereinheit 3 hat eine von einem Elektromotor 4 angetriebene Kraftstoffpumpe 5 und einen Pumpenhalter 6 zur Befestigung der Kraftstoffpumpe in dem Schwalltopf 2. Hierfür ist der Pumpenhalter 6 mit dem Bodenbereich des Schwalltopfes 2 verschraubt und hat eine Rastverbindung 7 mit der Kraftstoffpumpe 5. Die Rastverbindung 7 ist als von dem Pumpenhalter 6 abstehender und um die Kraftstoffpumpe 5 umlaufender Rand 8 mit einem radial nach innen weisenden Vorsprung 9 gestaltet. Der Vorsprung 9 dringt in eine Vertiefung 10 der Kraftstoffpumpe 5 ein. Der Pumpenhalter 6 ist mit dem Bodenbereich des Schwalltopfes 2 verschraubt.Figure 1 shows one at a bottom of a fuel tank 1 of a motor vehicle arranged swirl pot. 2 with a conveyor unit arranged therein 3. The conveyor unit 3 has one of an electric motor 4 driven Fuel pump 5 and a pump holder 6 for attachment the fuel pump in the swirl pot 2. For this purpose is the pump holder 6 with the bottom portion of the swirl pot 2 bolted and has a locking connection 7 with the fuel pump 5. The locking connection 7 is as of the pump holder 6 protruding and the fuel pump 5 circumferential edge 8 with a radially inwardly facing Projection 9 designed. The projection 9 penetrates into one Well 10 of the fuel pump 5 a. The pump holder 6 is bolted to the bottom portion of the swirl pot 2.

Die Kraftstoffpumpe 5 ist als Seitenkanalpumpe ausgebildet und hat ein sich in einem Pumpengehäuse 11 drehendes Laufrad 12. Weiterhin weist die Kraftstoffpumpe 5 eine sich von einem Einlaßkanal 13 bis zu einem Auslaßkanal 14 erstreckende Förderkammer 15 auf. Von einem mittleren Bereich der Förderkammer 15 führt ein Abzweig 16 zu einer Saugstrahlpumpe 17. Die Saugstrahlpumpe 17 hat eine mit dem Abzweig 16 verbundene Düse 18 und ein von der Düse 18 beabstandetes Mischrohr 19. Die Düse 18 und das Mischrohr 19 werden jeweils zu einer Hälfte von dem Schwalltopf 2 und zur anderen Hälfte von dem Pumpenhalter 6 gebildet. Hierdurch lassen sich beide Bauteile in einer axial entformbaren Spritzgußform fertigen. Der Bereich zwischen dem Mischrohr 19 und der Düse 18 ist über eine Ausnehmung 20 in dem Bodenbereich des Schwalltopfes 2 mit dem Kraftstoffbehälter 1 verbunden. In der Ausnehmung 20 ist ein Bodenventil 21 angeordnet, durch welches ausschließlich Kraftstoff in den Schwalltopf 2 eindringen kann. Weiterhin ist vor der Ausnehmung 20 ein Kraftstoffilter 22 angeordnet. Zur Montage oder Demontage der Fördereinheit läßt sich wahlweise die Kraftstoffpumpe 5 von dem Pumpenhalter 6 abziehen, oder der Pumpenhalter 6 zusammen mit der Kraftstoffpumpe 5 von dem Schwalltopf 2 abschrauben.The fuel pump 5 is designed as a side channel pump and has a rotating in a pump housing 11 Impeller 12. Furthermore, the fuel pump 5 a from an inlet channel 13 to an outlet channel 14th extending delivery chamber 15. From a middle area the delivery chamber 15 leads a branch 16 to a Suction jet pump 17. The suction jet pump 17 has a the nozzle 16 connected to the branch 16 and one of the nozzle 18 spaced mixing tube 19. The nozzle 18 and the mixing tube 19 are each to one half of the swirl pot. 2 and formed on the other half of the pump holder 6. As a result, both components can be in an axially demoldable Finished injection mold. The area between the mixing tube 19 and the nozzle 18 is via a recess 20 in the bottom area of the swirl pot 2 with the fuel tank 1 connected. In the recess 20 is a Bottom valve 21 is arranged, through which exclusively Fuel can penetrate into the swirl pot 2. Farther is located in front of the recess 20, a fuel filter 22. For mounting or dismounting the delivery unit can be optionally the fuel pump 5 from the pump holder 6, or the pump holder 6 together with unscrew the fuel pump 5 from the swirl pot 2.

Die Kraftstoffpumpe 5 saugt Kraftstoff über den Feinfilter 23 aus dem Schwalltopf 2 an und fördert ihn über den Auslaßkanal 15 zu einer nicht dargestellten Brennkraftmaschine des Kraftfahrzeuges. Dabei gelangt eine Teilmenge des Kraftstoffs über den Abzweig 16 zu der Düse 18 der Saugstrahlpumpe 17. Die Saugstrahlpumpe 17 saugt über das Bodenventil 21 Kraftstoff aus dem Kraftstoffbehälter 1 an und fördert diesen in den Schwalltopf 2. Zur Verdeutlichung sind in der Zeichnung die Strömungen des Kraftstoffs mit Pfeilen gekennzeichnet. Hierdurch wird sichergestellt, daß jederzeit Kraftstoff in dem Schwalltopf 2 vorhanden ist.The fuel pump 5 sucks fuel through the fine filter 23 from the swirl pot 2 and promotes him over the Outlet 15 to an internal combustion engine, not shown of the motor vehicle. This will get a subset of the fuel via the branch 16 to the nozzle 18 of the Suction jet pump 17. The suction jet pump 17 sucks over the Bottom valve 21 fuel from the fuel tank 1 at and promotes this in the swirl pot 2. For clarification are in the drawing the currents of the fuel marked with arrows. This will ensure that any time fuel in the swirl pot. 2 is available.

Figur 2 zeigt eine weitere Ausführungsform der in dem Schwalltopf 2 angeordneten Fördereinheit 29. Diese Fördereinheit 29 unterscheidet sich von der aus Figur 1 vor allem dadurch, daß eine Saugstrahlpumpe 24 als separates Bauteil in einer Aufnahme 25 eines Pumpenhalters 26 eingesetzt ist. Der Pumpenhalter 26 hat zur Halterung der Saugstrahlpumpe 24 Dichtringe 27. Weiterhin ist der Pumpenhalter 26 über eine Rastverbindung 28 an dem Bodenbereich des Schwalltopfes 2 befestigt.Figure 2 shows a further embodiment of the in the Swirl pot 2 arranged conveyor unit 29. This conveyor unit 29 differs from that of FIG all the fact that a suction jet pump 24 as a separate Component used in a receptacle 25 of a pump holder 26 is. The pump holder 26 has to hold the Suction jet pump 24 Sealing rings 27. Furthermore, the pump holder 26 via a latching connection 28 at the bottom area the swirl pot 2 attached.

In den Figuren 3a und 3b sind verschiedene Förderkammeranordnungen zum Speisen der Saugstrahlpumpe dargestellt. In der Figur 3a sind zwei Förderkammern 15, 15' hintereinander und in Figur 3b konzentrisch zueinander angeordnet sind. Die jeweils längere Förderkammer 15 besitzt einen Einlaßkanal 13 zum Schwalltopf und einen Auslaßkanal 14 zur Brennkraftmaschine des Kraftfahrzeugs. Die jeweils kürzere Förderkammer 15' besitzt mit dem Einlaß 31 eine eigene Verbindung zum Schwalltopf. Über einen Auslaß 32 ist die Förderkammer 15' mit der Düse der Saugstrahlpumpe verbunden.In Figures 3a and 3b are different delivery chamber arrangements shown for feeding the suction jet pump. In FIG. 3a, two delivery chambers 15, 15 'are arranged one behind the other and arranged concentrically with each other in FIG. 3b are. The respective longer delivery chamber 15 has a Inlet 13 to the swirl pot and an outlet 14 to the internal combustion engine of the motor vehicle. The respectively shorter delivery chamber 15 'has with the inlet 31 a own connection to the swirl pot. Via an outlet 32 is the delivery chamber 15 'with the nozzle of the suction jet pump connected.

Claims (8)

  1. Pump unit disposed in a surge chamber of a fuel tank of a motor vehicle, having a fuel pump which is provided for pumping fuel to an internal combustion engine of the motor vehicle, having an ejector pump which is connected to the fuel pump and is used to pump fuel out of the fuel tank into the surge chamber, and having a pump bracket for securing the fuel pump in the surge chamber, the ejector pump (17, 24) together with the pump bracket (6, 26) and/or the surge chamber (2) being designed as a constructional unit, characterized in that a nozzle (18) and the mixing pipe (19) of the ejector pump (17) are divided and in each case one half is arranged in the surge chamber (2) and the other half is arranged in the pump bracket (6), or in that the ejector pump (24) is inserted as a separate component in a plane of separation between the surge chamber (2) and pump bracket (26).
  2. Pump unit according to Claim 1, characterized in that the pump bracket (6, 26), which is fastened to the bottom of the surge chamber (2), has a latching connection (7) to the fuel pump (5).
  3. Pump unit according to Claim 1 or 2, characterized in that the pump bracket (6, 26) has a peripheral edge (8) engaging around a lower region of the fuel pump (5), and the latching connection (7) has a radially inwardly pointing projection (9) arranged on the free end of the edge (8).
  4. Pump unit according to at least one of the preceding claims, characterized in that a connection of the pump bracket (6, 26) to the bottom of the surge chamber (2) is of form-fitting design.
  5. Pump unit according to at least one of the preceding claims, characterized in that the bottom of the surge chamber (2) has a subregion of a mixing pipe (19) of the ejector pump (17).
  6. Pump unit according to at least one of the preceding claims, characterized in that the ejector pump (24) is connected in a form-fitting manner to the pump bracket (26).
  7. Pump unit according to at least one of the preceding claims, characterized in that the fuel pump (5) is designed as a peripheral pump or side channel pump, and in that a nozzle (18) of the ejector pump (17, 24) is connected to a branch (16) arranged in the central region of a pump chamber (15) of the fuel pump (5).
  8. Pump unit according to at least one of the preceding claims, characterized in that the fuel pump (5) is designed as a peripheral pump or side channel pump, and in that a nozzle (18) of the ejector pump (17, 24) is connected to the outlet (32) of the pump chamber (15'), the pump chamber (15') being fluidically separated from the pump chamber (15).
EP00125410A 1999-11-23 2000-11-20 Pump unit disposed in a surge chamber of a fuel tank of a vehicle Expired - Lifetime EP1103717B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19956141 1999-11-23
DE19956141 1999-11-23
DE10055344 2000-11-08
DE10055344A DE10055344A1 (en) 1999-11-23 2000-11-08 Conveying unit arranged in a swirl pot of a fuel tank of a motor vehicle

Publications (2)

Publication Number Publication Date
EP1103717A1 EP1103717A1 (en) 2001-05-30
EP1103717B1 true EP1103717B1 (en) 2005-03-23

Family

ID=26007599

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00125410A Expired - Lifetime EP1103717B1 (en) 1999-11-23 2000-11-20 Pump unit disposed in a surge chamber of a fuel tank of a vehicle

Country Status (4)

Country Link
US (1) US6478014B1 (en)
EP (1) EP1103717B1 (en)
AT (1) ATE291692T1 (en)
ES (1) ES2238240T3 (en)

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Also Published As

Publication number Publication date
ATE291692T1 (en) 2005-04-15
US6478014B1 (en) 2002-11-12
ES2238240T3 (en) 2005-09-01
EP1103717A1 (en) 2001-05-30

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