EP1664543A1 - Fuel pump for a fuel tank - Google Patents

Fuel pump for a fuel tank

Info

Publication number
EP1664543A1
EP1664543A1 EP04766381A EP04766381A EP1664543A1 EP 1664543 A1 EP1664543 A1 EP 1664543A1 EP 04766381 A EP04766381 A EP 04766381A EP 04766381 A EP04766381 A EP 04766381A EP 1664543 A1 EP1664543 A1 EP 1664543A1
Authority
EP
European Patent Office
Prior art keywords
chambers
delivery
impeller
fuel
delivery chambers
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.)
Withdrawn
Application number
EP04766381A
Other languages
German (de)
French (fr)
Inventor
Johannes Deichmann
Eberhard Geissel
Bernd Jaeger
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.)
Continental Automotive GmbH
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP1664543A1 publication Critical patent/EP1664543A1/en
Withdrawn legal-status Critical Current

Links

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
    • F02M37/04—Feeding by means of driven pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D5/00—Pumps with circumferential or transverse flow
    • F04D5/002—Regenerative pumps
    • F04D5/003—Regenerative pumps of multistage type
    • F04D5/005—Regenerative pumps of multistage type the stages being radially offset
    • 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
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/08—Feeding by means of driven pumps electrically driven
    • F02M37/10—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D5/00—Pumps with circumferential or transverse flow

Definitions

  • the invention relates to a fuel pump for a fuel tank of a motor vehicle with an impeller rotatably arranged in a housing, with at least two rings arranged in both end faces of the impeller and concentrically surrounding wreaths delimiting vane chambers, wherein opposite vane chambers are connected to one another arranged in the housing, opposite the guide vanes partially annular channels to form concentrically enclosing delivery chambers for delivering fuel from an inlet channel to an outlet channel.
  • Such fuel pumps are often used to deliver fuel from fuel tanks to internal combustion engines of today's motor vehicles and are known from practice.
  • Kraf fuel pump one of the delivery chambers of the known fuel umpe to the P islasskanal and the other of the delivery chambers to an outlet through which, for example, a suction jet pump is supplied with fuel.
  • a very large cross section is too. the delivery chamber leading the outlet channel required.
  • DrLes leads to a very large axial height of the fuel pump. Since the fuel tanks of today's motor vehicles are usually designed very low and angled, only fuel pumps with a particularly low overall height can be used. In practice, it helps to use several fuel pumps in the fuel tank. However, this leads to a very expensive expenditure in the fuel tank.
  • the invention is based on the problem of designing a fuel umpe of the type mentioned at the outset in such a way that it has particularly small axial dimensions and has the highest possible delivery volume.
  • this problem is solved in that the two delivery chambers are each connected to a common inlet channel and a common outlet channel.
  • the two delivery chambers are arranged parallel to one another. Thanks to the invention, a cross section required to convey a large volume flow is distributed over two delivery chambers. These conveying chambers can have considerably smaller dimensions in the axial direction than a single conveying chamber. A particularly powerful internal combustion engine can therefore be supplied with fuel using a single fuel pump according to the invention.
  • the invention further contributes to a further increase in the delivery pressure and in the case of a high delivery volume if two impellers are arranged on a common shaft and are kept at a distance by means of a partition wall if delivery chambers are arranged concentrically on the impellers and if the conveying chambers of one impeller are connected to the conveying chambers of the other impeller in the partition and if the conveying chambers of one of the impellers are connected to the inlet duct and the conveying chambers of the other of the impellers are connected to the outlet duct.
  • Tests have shown that with the fuel pump according to the invention delivery volume of over 300 1 / h can be generated at a delivery pressure of more than 8 bar.
  • a different pressure build-up of the two delivery chambers of the impeller arranged closest to the inlet duct can be easily compared if a connection in the partition wall connects all of the delivery chambers of the two impellers to one another.
  • Delivery chambers of one impeller is connected to the radially outer delivery chamber of the other impeller.
  • the fuel pump according to the invention can be manufactured particularly easily if the radially outer delivery chambers and the radially inner delivery chambers are connected to one another. With this design, the connections can penetrate the partition wall in a straight path.
  • swirling in the inlet channel can be easily avoided if the inlet channel has a web for dividing the delivery chambers.
  • Turbulence in the outlet duct can be easily avoided according to another advantageous development of the invention. if the outlet channel has a web for dividing the delivery chambers.
  • supplying a suction jet pump with fuel requires a particularly low structural outlay if the impeller arranged on the inlet channel has a further delivery chamber which is arranged concentrically with the other delivery chambers and is separate therefrom and if the further delivery chamber has its own outlet.
  • FIG. 1 shows a longitudinal section through a delivery unit with a fuel according to the invention
  • FIG. 2 shows a schematic sectional illustration of a further embodiment of the fuel pump according to the invention
  • FIG. 3 shows a schematic sectional illustration of a further embodiment of the fuel pump according to the invention.
  • FIG. 1 shows a longitudinal section through a delivery unit 1 for delivering fuel from a fuel tank 2 to an internal combustion engine (not shown) of a motor vehicle.
  • the delivery unit 1 is arranged in a surge pot 3 that is prestressed against a base region of the fuel tank 2.
  • the swirl pot 3 is supplied with fuel from the fuel tank 2 via a suction jet pump 4 crowded.
  • the feed unit 1 has a fuel pump 6 driven by an electric motor 5 and a connecting piece 7 for a fuel line leading to the internal combustion engine and the suction jet pump 4.
  • the fuel umpe 6 has two on a shaft 8 of the electric motor 5 rotatably arranged impellers 9, 10, each with two concentrically surrounding rings guide vanes 11, 12 vane chambers 13, 14 opposing vane chambers 13, 14 of each of the impellers 9, 10 are together connected.
  • the impellers 9, 10 are thus flowed through axially.
  • the impellers 9, 10 are each axially supported between a housing part 15, 16 and a partition 17.
  • the blade chambers 13, 14 each form a delivery chamber 20-23 with part-ring-shaped channels 18, 19 arranged in the partition 17 and the housing parts 15, 16.
  • a connection 24 for the four delivery chambers 20-23 is arranged in the partition 17.
  • the delivery chambers 20, 21 of one impeller 9 are connected to an inlet channel 25, while the delivery chambers 22, 23 of the other impeller 10 are connected to an outlet channel 26.
  • the inlet channel 25 and the outlet channel 26 each penetrate one of the housing parts 15, 16 and each have a web 27, 28.
  • the web 27, 28 separates the fuel delivered in the delivery chambers 20-23.
  • FIG. 2 shows schematically a further embodiment of the fuel pump according to the invention. This differs from that of FIG. 1 primarily in that a radially inner delivery chamber 29, 31 of a first impeller 33 is connected to a radially outer delivery chamber 30, 32 of a second impeller 34. Furthermore, one of the running wires 33 has a further delivery chamber 36 which leads to an outlet 35. Via this further delivery chamber 36, another consumer, such as the suction device shown in FIG. Jet pump 4, supply with fuel as a propellant.
  • a partition 45 holding the impellers 33, 34 at a distance from one another has two crossed connections 43, 44. These connections 43, 44 are arranged offset from one another in the direction of rotation of the impellers 33, 34.
  • FIG. 3 schematically shows a further embodiment of the fuel pump according to the invention, in each of which two delivery chambers 37-40 concentrically enclosing one another have two straight connections 41, 42 which are separated from one another. Otherwise, the fuel pump is constructed as described for FIG. 1.
  • connections 24, 41-44 between the delivery chambers 20-23, 29-32, 37-40 as well as the inlet channels (25) and the outlet channels (26) are each shown rotated in the drawing plane to clarify the drawing.
  • the delivery chambers 20-23, 29-32, 37-40 usually extend over an angular range of approximately 300 ° to 330 °.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention relates to a fuel pump (6) that is configured as a lateral channel pump. Said pump is equipped with two respective supply chambers (20-23), arranged concentrically in relation to one another and located on each of two impellers (9, 10). The supply chambers (20, 21) of one impeller (9) are connected to an inlet channel (25), whereas the supply chambers (22, 23) of the other impeller (10) are connected to an outlet channel (26). A connection (24) between the supply chambers (20-23) is located in a partition (17) that maintains the impellers (9, 10) at a distance from one another. This permits the fuel pump (6) to achieve an extremely high volumetric flow at an extremely high supply pressure.

Description

Beschreibungdescription
Kraftstoffpumpe für einen KraftstoffbehälterFuel pump for a fuel tank
Die Erfindung betrifft eine Kraftstoffpumpe für einen Kraftstoffbehälter eines Kraftf hrzeuges mit einem in einem Gehäuse drehbar angeordneten Laufrad, mit zumindest zwei in beiden Stirnseiten des Laufrades angeordneten, einander konzentrisch umschließenden Kränzen Schaufelkammern begrenzende Leitschau- fein, wobei einander gegenüberliegende Sc aufelkammern miteinander verbunden sind, mit in dem Gehäuse angeordneten, den Leitschaufeln gegenüberstehenden teilringförmigen Kanälen zur Bildung von einander konzentrisch umschließenden Förderkammern zur Förderung von Kraftstoff von einem Einlasskanal zu einem Auslasskanal .The invention relates to a fuel pump for a fuel tank of a motor vehicle with an impeller rotatably arranged in a housing, with at least two rings arranged in both end faces of the impeller and concentrically surrounding wreaths delimiting vane chambers, wherein opposite vane chambers are connected to one another arranged in the housing, opposite the guide vanes partially annular channels to form concentrically enclosing delivery chambers for delivering fuel from an inlet channel to an outlet channel.
Solche Kraftstoffpumpen werden zur Förderung von Kraftstoff aus Kraftstoffbehältern zu Brennkraftmaschinen heutiger Kraftfahrzeuge häufig eingesetzt und sind aus der- Praxis be- kannt . Bei der bekannten Kraf stoffpumpe wird eine der Förderkammern der bekannten Kraftstoff umpe zu dem P islasskanal und die andere der Förderkammern zu einem Auslass geführt, über den beispielsweise eine Saugstrahlpumpe mit Kraftstoff versorgt wird. Für heutige leistungsstarke Brennkzraftmaschi- nen ist jedoch ein sehr großer Querschnitt der zu. dem Auslasskanal führenden Förderkammer erforderlich. DrLes führt zu einer sehr großen axialen Bauhöhe der Kraftstoffpumpe . Da die Kraftstoffbehälter heutiger Kraftfahrzeuge j edockt meist sehr niedrig und verwinkelt gestaltet sind, lassen sich nur Kraf - stoffpumpen mit einer besonders niedrigen Bauhöhe einsetzen. In der Praxis behilft man sich damit, mehrere Kraftstoffpumpen in dem Kraftstoffbehälter einzusetzen. Dies führt jedoch zu einem sehr kostenintensiven Aufwand im Kraftstoffbehälter. Der Erfindung liegt das Problem zugrunde, eine Kraftstoff umpe der eingangs genannten Art so zu gestalten, dass sie besonders geringe axiale Abmessungen aufweist und ein möglichst hohes Fördervolumen aufweist.Such fuel pumps are often used to deliver fuel from fuel tanks to internal combustion engines of today's motor vehicles and are known from practice. In the known Kraf fuel pump one of the delivery chambers of the known fuel umpe to the P islasskanal and the other of the delivery chambers to an outlet through which, for example, a suction jet pump is supplied with fuel. For today's powerful internal combustion engines, however, a very large cross section is too. the delivery chamber leading the outlet channel required. DrLes leads to a very large axial height of the fuel pump. Since the fuel tanks of today's motor vehicles are usually designed very low and angled, only fuel pumps with a particularly low overall height can be used. In practice, it helps to use several fuel pumps in the fuel tank. However, this leads to a very expensive expenditure in the fuel tank. The invention is based on the problem of designing a fuel umpe of the type mentioned at the outset in such a way that it has particularly small axial dimensions and has the highest possible delivery volume.
Dieses Problem wird erfindungsgemäß dadurch gelöst, dass die beiden Förderkammern jeweils mit einem gemeinsamen Einlasskanal und einem gemeinsamen Auslasskanal verbunden sind.According to the invention, this problem is solved in that the two delivery chambers are each connected to a common inlet channel and a common outlet channel.
Durch diese Gestaltung sind die beiden Förderkammern parallel zueinander angeordnet . Ein zur Förderung eines großen Volumenstroms erforderlicher Querschnitt verteilt sich dank der Erfindung auf zwei Förderkammern. Diese Förderkammern können in axialer Richtung wesentlich geringere Abmessungen aufweisen als eine einzelne Förderkammer. Daher lässt sich mit einer einzelnen erfindungsgemäßen Kraftstoffpumpe eine besonders leistungsstarke Brennkraftmaschine mit Kraftstoff versorgen.With this design, the two delivery chambers are arranged parallel to one another. Thanks to the invention, a cross section required to convey a large volume flow is distributed over two delivery chambers. These conveying chambers can have considerably smaller dimensions in the axial direction than a single conveying chamber. A particularly powerful internal combustion engine can therefore be supplied with fuel using a single fuel pump according to the invention.
Zur weiteren Erhöhung des Förderdrucks und bei hohem Fördervolumen trägt es gemäß einer anderen vorteilhaften Weiterbildung der Erfindung bei, wenn zwei Laufräder auf einer gemeinsamen Welle angeordnet und mittels einer Trennwand auf Ab- stand gehalten sind, wenn an den Laufrädern jeweils einander konzentrisch umschließende Förderkammern angeordnet sind und wenn die Förderkammern des einen Laufrades mit den Förderkammern des anderen Laufrades in der Trennwand eine Verbindung aufweisen und wenn die Förderkammern eines der Laufräder mit dem Einlasskanal und die Förderkammern des anderen der Laufräder mit dem Auslasskanal verbunden sind. Versuche haben gezeigt, dass mit der erfindungsgemäßen Kraftstoffpumpe Förder- volumen von über 300 1/h bei mehr als 8 bar Förderdruck erzeugt werden können.According to another advantageous development of the invention, it further contributes to a further increase in the delivery pressure and in the case of a high delivery volume if two impellers are arranged on a common shaft and are kept at a distance by means of a partition wall if delivery chambers are arranged concentrically on the impellers and if the conveying chambers of one impeller are connected to the conveying chambers of the other impeller in the partition and if the conveying chambers of one of the impellers are connected to the inlet duct and the conveying chambers of the other of the impellers are connected to the outlet duct. Tests have shown that with the fuel pump according to the invention delivery volume of over 300 1 / h can be generated at a delivery pressure of more than 8 bar.
Ein unterschiedlicher Druckaufbau der beiden Förderkammern des dem Einlasskanal am nächsten angeordneten Laufrades lässt sich gemäß einer anderen vorteilhaften Weiterbildung der Erfindung einfach vergleichmäßigen, wenn eine Verbindung in der Trennwand sämtliche Förderkammern der beiden Laufräder miteinander verbindet .According to another advantageous development of the invention, a different pressure build-up of the two delivery chambers of the impeller arranged closest to the inlet duct can be easily compared if a connection in the partition wall connects all of the delivery chambers of the two impellers to one another.
Eine gleichmäßige Beschleunigung der Strömungen in den Förderkammern zwischen dem Einlasskanal und dem Auslasskanal lässt sich gemäß einer anderen vorteilhaften Weiterbildung der Erfindung einfach erreichen, wenn die Trennwand zwei Ver- bindungen aufweist und wenn jeweils die radial innere derA uniform acceleration of the flows in the delivery chambers between the inlet channel and the outlet channel can be easily achieved according to another advantageous development of the invention if the partition wall has two connections and if the radially inner one in each case
Förderkammern des einen Laufrades mit der radial äußeren Förderkammer des anderen Laufrades verbunden ist .Delivery chambers of one impeller is connected to the radially outer delivery chamber of the other impeller.
Die erfindungsgemäße Kraftstoffpumpe lässt sich gemäß einer anderen vorteilhaften Weiterbildung der Erfindung besonders einfach fertigen, wenn jeweils die radial äußeren Förderkammern und die radial inneren Förderkammern untereinander verbunden sind. Durch diese Gestaltung können die Verbindungen die Trennwand auf geradem Wege durchdringen.According to another advantageous development of the invention, the fuel pump according to the invention can be manufactured particularly easily if the radially outer delivery chambers and the radially inner delivery chambers are connected to one another. With this design, the connections can penetrate the partition wall in a straight path.
Verwirbelungen im Einlasskanal lassen sich gemäß einer anderen vorteilhaften Weiterbildung der Erfindung einfach vermeiden, wenn der Einlasskanal einen Steg zur Aufteilung der Förderkammern aufweist .According to another advantageous development of the invention, swirling in the inlet channel can be easily avoided if the inlet channel has a web for dividing the delivery chambers.
Verwirbelungen im Auslasskanal lassen sich gemäß einer anderen vorteilhaften Weiterbildung der Erfindung einfach vermei- den, wenn der Auslasskanal einen Steg zur Aufteilung der Förderkammern aufweist .Turbulence in the outlet duct can be easily avoided according to another advantageous development of the invention. if the outlet channel has a web for dividing the delivery chambers.
Eine Versorgung einer Saugstrahlpumpe mit Kraftstoff erfor- dert gemäß einer anderen vorteilhaften Weiterbildung der Erfindung einen besonders geringen baulichen Aufwand, wenn das am Einlasskanal angeordnete Laufrad eine weitere, konzentrisch zu den anderen Förderkammern angeordnete und von diesen getrennte Förderkammer hat und wenn die weitere Förder- kammer einen eigenen Auslass hat.According to another advantageous development of the invention, supplying a suction jet pump with fuel requires a particularly low structural outlay if the impeller arranged on the inlet channel has a further delivery chamber which is arranged concentrically with the other delivery chambers and is separate therefrom and if the further delivery chamber has its own outlet.
Die Erfindung lässt zahlreiche Ausführungsformen zu. Zur weiteren Verdeutlichung der Erfindung sind drei davon in der Zeichnung dargestellt und werden nachfolgend beschrieben. Diese zeigt inThe invention permits numerous embodiments. To further clarify the invention, three of them are shown in the drawing and are described below. This shows in
Figur 1 einen Längsschnitt durch eine Fördereinheit mit einer erfindungsgemäßen Kraftstoff umpe,FIG. 1 shows a longitudinal section through a delivery unit with a fuel according to the invention,
Figur 2 eine schematische Schnittdarstellung einer weiteren Ausführungsform der erfindungsgemäßen Kraftstoffpumpe,FIG. 2 shows a schematic sectional illustration of a further embodiment of the fuel pump according to the invention,
Figur 3 eine schematische Schnittdarstellung einer weite- ren Ausführungsform der erfindungsgemäßen Kraftstoffpumpe . Figur 1 zeigt einen Längsschnitt durch eine Fördereinheit 1 zur Förderung von Kraftstoff aus einem Kraftstoffbehälter 2 zu einer nicht dargestellten Brennkraftmaschine eines Kraf - fahrzeuges. Die Fördereinheit 1 ist in einem gegen einen Bodenbereich des Kraftstoffbehälters 2 vorgespannten Schwall- topf 3 angeordnet. Der Schwalltopf 3 wird über eine Saugstrahlpumpe 4 mit Kraftstoff aus dem Kra tstoffbehälter 2 be- füllt. Die Fördereinheit 1 weist eine von einem Elektromotor 5 angetriebene Kra tstoffpumpe 6 und einen Anschlussstutzen 7 für eine zu der Brennkraftmaschine und der Saugstrahlpumpe 4 führende Kraftstoffleitung auf. Die Kraftstoff umpe 6 hat zwei auf einer Welle 8 des Elektromotors 5 drehfest angeordnete Laufräder 9, 10 mit jeweils zwei sich konzentrisch umschließenden Kränzen Leitschaufeln 11, 12 begrenzende Schaufelkammern 13 , 14. Einander gegenüberstehende Schaufelkammern 13, 14 jedes der Laufräder 9, 10 sind miteinander verbunden. Die Laufräder 9, 10 werden damit axial durchströmt. Die Laufräder 9, 10 sind jeweils axial zwischen einem Gehäuseteil 15, 16 und einer Trennwand 17 gelagert. Die Schaufelkammern 13, 14 bilden mit in der Trennwand 17 und den Gehäuseteilen 15, 16 angeordneten teilringförmigen Kanälen 18, 19 jeweils eine Förderkammer 20-23. In der Trennwand 17 ist eine Verbindung 24 für die vier Förderkammern 20-23 angeordnet. Die Förderkammern 20, 21 des einen Laufrades 9 sind mit einem Einlass- kanal 25 verbunden, während die Förderkammern 22, 23 des anderen Laufrades 10 mit einem Auslasskanal 26 verbunden sind. Der Einlasskanal 25 und der Auslasskanal 26 durchdringen jeweils eines der Gehäuseteile 15, 16 und weisen jeweils einen Steg 27, 28 auf. Der Steg 27, 28 trennt den in den Förderkammern 20-23 geförderten Kraftstoff.FIG. 3 shows a schematic sectional illustration of a further embodiment of the fuel pump according to the invention. FIG. 1 shows a longitudinal section through a delivery unit 1 for delivering fuel from a fuel tank 2 to an internal combustion engine (not shown) of a motor vehicle. The delivery unit 1 is arranged in a surge pot 3 that is prestressed against a base region of the fuel tank 2. The swirl pot 3 is supplied with fuel from the fuel tank 2 via a suction jet pump 4 crowded. The feed unit 1 has a fuel pump 6 driven by an electric motor 5 and a connecting piece 7 for a fuel line leading to the internal combustion engine and the suction jet pump 4. The fuel umpe 6 has two on a shaft 8 of the electric motor 5 rotatably arranged impellers 9, 10, each with two concentrically surrounding rings guide vanes 11, 12 vane chambers 13, 14 opposing vane chambers 13, 14 of each of the impellers 9, 10 are together connected. The impellers 9, 10 are thus flowed through axially. The impellers 9, 10 are each axially supported between a housing part 15, 16 and a partition 17. The blade chambers 13, 14 each form a delivery chamber 20-23 with part-ring-shaped channels 18, 19 arranged in the partition 17 and the housing parts 15, 16. A connection 24 for the four delivery chambers 20-23 is arranged in the partition 17. The delivery chambers 20, 21 of one impeller 9 are connected to an inlet channel 25, while the delivery chambers 22, 23 of the other impeller 10 are connected to an outlet channel 26. The inlet channel 25 and the outlet channel 26 each penetrate one of the housing parts 15, 16 and each have a web 27, 28. The web 27, 28 separates the fuel delivered in the delivery chambers 20-23.
Figur 2 zeigt schematisch eine weitere Ausführungsform der erfindungsgemäßen Kraftstoffpumpe. Diese unterscheidet sich von der aus Figur 1 vor allem dadurch, dass eine radial innere Förderkammer 29, 31 eines ersten Laufrades 33 mit einer radial äußeren Förderkammer 30, 32 eines zweiten Laufrades 34 verbunden ist. Weiterhin hat eines der Lauf äder 33 eine weitere, zu einem Auslass 35 geführte Förderkammer 36. Über diese weitere Förderkammer 36 lässt sich ein weiterer Verbraucher, wie beispielsweise die in Figur 1 dargestellte Saug- Strahlpumpe 4, mit Kraftstoff als Treibmittel versorgen. Eine die Laufräder 33, 34 auf Abstand zueinander haltende Trennwand 45 hat zwei gekreuzte Verbindungen 43, 44. Diese Verbindungen 43, 44 sind in Drehrichtung der Laufräder 33, 34 ver- setzt zueinander angeordnet .Figure 2 shows schematically a further embodiment of the fuel pump according to the invention. This differs from that of FIG. 1 primarily in that a radially inner delivery chamber 29, 31 of a first impeller 33 is connected to a radially outer delivery chamber 30, 32 of a second impeller 34. Furthermore, one of the running wires 33 has a further delivery chamber 36 which leads to an outlet 35. Via this further delivery chamber 36, another consumer, such as the suction device shown in FIG. Jet pump 4, supply with fuel as a propellant. A partition 45 holding the impellers 33, 34 at a distance from one another has two crossed connections 43, 44. These connections 43, 44 are arranged offset from one another in the direction of rotation of the impellers 33, 34.
Figur 3 zeigt schematisch eine weitere Ausführungsform der erfindungsgemäßen Kra tstoffpumpe, bei der jeweils zwei einander konzentrisch umschließende Förderkammern 37-40 zwei voneinander getrennte gerade Verbindungen 41, 42 aufweisen. Ansonsten ist die Kraftstoffpumpe wie zu Figur 1 beschrieben aufgebaut .FIG. 3 schematically shows a further embodiment of the fuel pump according to the invention, in each of which two delivery chambers 37-40 concentrically enclosing one another have two straight connections 41, 42 which are separated from one another. Otherwise, the fuel pump is constructed as described for FIG. 1.
Die Verbindungen 24, 41-44 zwischen den Förderkammern 20-23, 29-32, 37-40 sowie die Einlasskanäle (25) und die Auslasskanäle (26) sind zur Verdeutlichung der Zeichnung jeweils in die Zeichenebene gedreht dargestellt. Tatsächlich erstrecken sich die Förderkammern 20-23, 29-32, 37-40 meist über einen Winkelbereich von ungefähr 300° bis 330°. The connections 24, 41-44 between the delivery chambers 20-23, 29-32, 37-40 as well as the inlet channels (25) and the outlet channels (26) are each shown rotated in the drawing plane to clarify the drawing. In fact, the delivery chambers 20-23, 29-32, 37-40 usually extend over an angular range of approximately 300 ° to 330 °.

Claims

Patentansprüche claims
1. Kraftstoffpumpe für einen Kraftstoffbehälter eines Kraftfahrzeuges mit einem in einem Gehäuse drehbar ange- ordneten Laufrad, mit zumindest zwei in beiden Stirnseiten des Laufrades angeordneten, einander konzentrisch umschließenden Kränzen Schaufelkammern begrenzende Leit- schaufeln, wobei einander gegenüberliegende Schaufelkammern miteinander verbunden sind, mit in dem Gehäuse an geordneten, den Leitschaufeln gegenüberstehenden teilringförmigen Kanälen zur Bildung von einander konzentrisch umschließenden Förderkammern zur Förderung von Kraftstoff von einem Einlasskanal zu einem Auslasskanal, d a du r c h g e k e n n z e i c hn e t , dass die bei den Förderkammern (20-23, 29-32, 37-40) jeweils mit einem gemeinsamen Einlasskanal (25) und einem gemeinsamen Auslasskanal (26) verbunden sind.1. Fuel pump for a fuel tank of a motor vehicle with an impeller rotatably arranged in a housing, with at least two concentrically surrounding rings arranged in both end faces of the impeller, vane chambers delimiting vane chambers, opposite vane chambers being connected to one another, in the Housing on ordered, part-annular channels opposite the guide vanes to form concentrically enclosing delivery chambers for delivering fuel from an inlet channel to an outlet channel, since you rchgekennzeic hn et that the in the delivery chambers (20-23, 29-32, 37-40 ) are each connected to a common inlet channel (25) and a common outlet channel (26).
2. Kraftstoffpumpe nach Anspruch 1, d a d u r c h g e - k e n n z e i c h n e t , dass zwei Laufräder (9, 10, 33, 34) auf einer gemeinsamen Welle (8) angeordnet und mit tels einer Trennwand (17) auf Abstand gehalten sind, dass an den Laufrädern (9, 10, 33, 34) jeweils einander konzentrisch umschließende Förderkammern (20-23, 29-32, 37-40) angeordnet sind und dass die Förderkammern (20-23, 29-32, 37-40) des einen Laufrades (9, 10, 33, 34) mit den Förderkammern (20-23, 29-32, 37-40) des anderen Laufrades (9, 10, 33, 34) in der Trennwand (17) eine Verbindung aufweisen und dass die Förderkammern (20-23, 29-32, 37-40) eines der Laufräder (9, 10, 33, 34) mit dem Einlasskanal (25) und die Förderkammern (20-23, 29-32, 37-40) des anderen der Laufräder (9, 10, 33, 34) mit dem Auslasskanal (26) verbunden sind. 2. Fuel pump according to claim 1, dadurchge - indicates that two impellers (9, 10, 33, 34) are arranged on a common shaft (8) and are kept at a distance by means of a partition (17) that on the impellers (9 , 10, 33, 34) concentrically enclosing delivery chambers (20-23, 29-32, 37-40) are arranged and that the delivery chambers (20-23, 29-32, 37-40) of one impeller (9, 10, 33, 34) have a connection with the delivery chambers (20-23, 29-32, 37-40) of the other impeller (9, 10, 33, 34) in the partition (17) and that the delivery chambers (20- 23, 29-32, 37-40) one of the impellers (9, 10, 33, 34) with the inlet channel (25) and the delivery chambers (20-23, 29-32, 37-40) of the other of the impellers (9 , 10, 33, 34) are connected to the outlet channel (26).
3. Kraftstoff umpe nach Anspruch 1 oder 2, d a du r c h g e k e nn z e i c hn e t , dass eine Verbindung (24) in der Trennwand (17) sämtliche Förderkammern (20-23) der beiden Laufräder (9, 10) miteinander verbindet.3. Fuel umpe according to claim 1 or 2, so that a connection (24) in the partition (17) connects all delivery chambers (20-23) of the two impellers (9, 10) to one another.
4. Kraftstoffpumpe nach Anspruch 1 oder 2, d a du r c h g e k e nn z e i c h n e t , dass die Trennwand (45) zwei Verbindungen (43, 44) aufweist und dass jeweils die ra- dial innere der Förderkammern (29, 31) des einen Laufrades (33, 34) mit der radial äußeren Förderkammer (30, 32) des anderen Laufrades (33, 34) verbunden ist.4. Fuel pump according to claim 1 or 2, since you draw rchgeke nn that the partition (45) has two connections (43, 44) and that the radial interior of the delivery chambers (29, 31) of the one impeller (33, 34) with the radially outer delivery chamber (30, 32) of the other impeller (33, 34).
5. Kraftstoffpumpe nach Anspruch 1 oder 2, d a du r c h g e k e nn z e i c h n e t , dass jeweils die radial äußeren Förderkammern (38, 40) und die radial inneren Förderkammern (37, 39) untereinander verbunden sind.5. Fuel pump according to claim 1 or 2, so that the radially outer delivery chambers (38, 40) and the radially inner delivery chambers (37, 39) are connected to one another.
6. Kraftstoffpumpe nach zumindest einem der vorhergehenden Ansprüche, d a du r c h g e k e n n z e i c hn e t- , dass der Einlasskanal (25) einen Steg (27) zur Aufteilung der Förderkammern (20-23, 29-32, 37-40) aufweist.6. Fuel pump according to at least one of the preceding claims, that the inlet channel (25) has a web (27) for dividing the delivery chambers (20-23, 29-32, 37-40).
7. Kraftstoffpumpe nach zumindest einem der vorhergehenden Ansprüche, d a du r c h g e k e n n z e i c hn e t , dass der Auslasskanal (26) einen Steg (28) zur Aufteilung der Förderkammern (20-23, 29-32, 37-40) aufweist. 7. Fuel pump according to at least one of the preceding claims, since you rchgekennzeic hn et that the outlet channel (26) has a web (28) for dividing the delivery chambers (20-23, 29-32, 37-40).
Kraftstoff umpe nach zumindest einem der vorhergehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t , dass das am Einlasskanal (25) angeordnete Laufrad (33) eine weitere, konzentrisch zu den anderen Förderkammern (29-32) angeordnete und von diesen getrennte Förderkammer (36) hat und dass die weitere Förderkammer (36) einen eigenen Auslass (35) hat. Fuel pump according to at least one of the preceding claims, characterized in that the impeller (33) arranged on the inlet channel (25) has a further delivery chamber (36) which is arranged concentrically with the other delivery chambers (29-32) and is separate therefrom, and in that the further delivery chamber Delivery chamber (36) has its own outlet (35).
EP04766381A 2003-09-09 2004-07-30 Fuel pump for a fuel tank Withdrawn EP1664543A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10341837A DE10341837B3 (en) 2003-09-09 2003-09-09 Fuel pump for fuel tank of motor vehicle has two running wheels on common shaft, spaced apart from each other by dividing wall
PCT/EP2004/051673 WO2005026556A1 (en) 2003-09-09 2004-07-30 Fuel pump for a fuel tank

Publications (1)

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EP1664543A1 true EP1664543A1 (en) 2006-06-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP04766381A Withdrawn EP1664543A1 (en) 2003-09-09 2004-07-30 Fuel pump for a fuel tank

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US (1) US7473069B2 (en)
EP (1) EP1664543A1 (en)
JP (1) JP2007505253A (en)
KR (1) KR20060113660A (en)
CN (1) CN1849454B (en)
DE (1) DE10341837B3 (en)
WO (1) WO2005026556A1 (en)

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Also Published As

Publication number Publication date
CN1849454B (en) 2011-08-03
US7473069B2 (en) 2009-01-06
DE10341837B3 (en) 2005-03-10
CN1849454A (en) 2006-10-18
KR20060113660A (en) 2006-11-02
WO2005026556A1 (en) 2005-03-24
US20050074345A1 (en) 2005-04-07
JP2007505253A (en) 2007-03-08

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