WO2002018774A1 - Device for delivering fuel from a storage tank to an internal combustion engine of a motor vehicle - Google Patents

Device for delivering fuel from a storage tank to an internal combustion engine of a motor vehicle Download PDF

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Publication number
WO2002018774A1
WO2002018774A1 PCT/DE2001/003262 DE0103262W WO0218774A1 WO 2002018774 A1 WO2002018774 A1 WO 2002018774A1 DE 0103262 W DE0103262 W DE 0103262W WO 0218774 A1 WO0218774 A1 WO 0218774A1
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WO
WIPO (PCT)
Prior art keywords
housing
storage container
conveying
storage tank
unit
Prior art date
Application number
PCT/DE2001/003262
Other languages
German (de)
French (fr)
Inventor
Mathias Rollwage
Stefan Woerz
Jochen Rose
Klaus Mueller
Erich Eiler
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2002018774A1 publication Critical patent/WO2002018774A1/en

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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
    • F02M37/04—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
    • F02M37/106—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir the pump being installed in a sub-tank

Definitions

  • the invention is based on a device for conveying fuel from a storage tank to an internal combustion engine of a motor vehicle according to the preamble of claim 1.
  • Such a device is known from DE 44 26 946 AI.
  • This device has a pot-shaped storage container arranged in the storage tank, in which a conveyor unit is arranged.
  • the conveyor unit has an electric drive motor and a pump part.
  • the pump part has a conveying member which is arranged in a pump chamber and is driven in rotation by the drive motor.
  • the drive motor and the pump part are arranged in a common housing.
  • the conveying unit forms a complete structural unit that is functional on its own and is inserted in and held in the storage container.
  • the device according to the invention with the features according to claim 1 has the advantage that its manufacture and assembly are simplified in that the housing of the conveyor unit is at least partially integrally formed with the storage container.
  • the housing of the conveyor unit can be manufactured together with the storage container in one manufacturing step.
  • FIG. 1 shows a device for conveying fuel from a storage tank to an internal combustion engine of a motor vehicle with a delivery unit
  • FIG. 2 shows the delivery unit in a cross section along line II-II in FIG. 1.
  • FIG. 1 shows a device for delivering fuel from a storage tank 10 to an internal combustion engine 12 of a motor vehicle.
  • the internal combustion engine 12 has an injection system through which fuel is injected into the cylinders of the internal combustion engine.
  • the device has a pot-shaped storage container 14 arranged in the storage tank 10, which has a substantially smaller volume than the storage tank 10.
  • the storage container 14 is open at its top and sits with its lower end on the bottom 11 of the storage tank 10.
  • the storage tank 10 has an opening 18 in an upper wall 16, through which the storage container 14 can be inserted into the storage tank 10 and which is then closed with a flange 20.
  • the storage container 14 has a bottom 22 and a peripheral wall 24 protruding in one piece therefrom.
  • the bottom 22 of the storage container 14 is arranged at a distance from the bottom 11 of the storage tank 10.
  • the storage container 14 can be round in cross section or can be of any other shape.
  • a delivery unit 30 is arranged, through which fuel is conveyed from the storage container 14 to the internal combustion engine 12.
  • the conveyor unit 30 has an electric drive motor 32, which is designed as a brushless DC motor.
  • the conveying unit 30 has a pre-stage pump part 34 which is arranged with the drive motor 32 in a common housing 36 which is at least partially formed in one piece with the storage container 14.
  • the delivery unit 30 also has a main stage pump part 38, which is arranged outside the housing.
  • the housing 36 of the conveyor assembly 30 has a base 40 which is formed in one piece with the base 22 of the storage container 14.
  • the housing 36 also has a peripheral wall 42 which protrudes in one piece from the bottom 22 of the storage container 14 within its peripheral wall 24 upwards.
  • the top of the housing 36 is closed by means of a separate cover part 44 which is connected to the peripheral wall 42.
  • the drive motor 32 has a disk-shaped rotor 46 which is mounted in the housing 36 so as to be rotatable about an axis 50 via a shaft 48.
  • the shaft 48 is rotatable with the Rotor 46 connected and rotatably supported on the one hand via a bearing shell 51 in a bore 52 in the bottom 40 of the housing 36 and on the other hand via a bearing shell 53 in a bore 54 in the cover part 44.
  • On the outer shell of the rotor 46 are distributed over its circumference
  • the rotor 46 is surrounded on its circumference by a stator 58 which is inserted into the circumferential wall 42 and which has cores 59 with coil windings 60.
  • the cores 59 of the stator 58 have approximately the same extent in the direction of the axis of rotation 50 as the rotor 46.
  • the coil windings 60 protrude beyond the cores 59 in the direction of the axis of rotation 50 of the rotor 46.
  • the bottom 40 of the housing 36 has an approximately central elevation 62 , whereby an annular space 63 is arranged between the elevation 62 and the peripheral wall 42, in which the downward-pointing parts of the coil windings 60 of the stator 58 are arranged. From the elevation 62 of the bottom 40 of the housing 36, another elevation 64 protrudes approximately centrally.
  • the pre-stage pump part 34 has a conveyor member which is driven in rotation by the rotor 46 and which is formed, for example, by the rotor 46 itself.
  • the rotor 46 is arranged in a pump chamber 65 and has a recess 66 in its central region, at least in its end face facing the bottom 40, as a result of which the thickness of the rotor 46, viewed in the direction of the axis of rotation 50, is smaller in its central region than on its circumference ,
  • the elevation 64 of the bottom 40 of the housing 30 protrudes into the recess 66 of the rotor 46.
  • the rotor 46 has on its end face facing the elevation 64 a ring of blades 68 spaced apart in the circumferential direction.
  • the elevation 64 of the bottom 40 of the housing 36 forms a boundary of the pump chamber 65 in the direction of the axis of rotation 50 of the rotor 46.
  • a partially annular conveyor channel 70 is formed opposite the blade ring 68 of the rotor 46 on the front side of the elevation 64.
  • a suction opening 72 is formed, which opens into the delivery channel 70 in the region of an beginning of the delivery channel 70 pointing in the opposite direction 47 of the rotor 46.
  • An outlet opening 74 leads from an end region of the conveying channel 70 pointing in the direction of rotation 47 of the rotor 46, which outlet opening can also be formed in the bottom 40.
  • the preliminary stage pump part 34 is thus designed as a side channel pump.
  • the preliminary stage pump part 34 can alternatively also be designed, for example, as a peripheral pump, as a gear pump or as a roller cell pump.
  • the feed member of the pre-stage pump part 34 can also be formed separately from the rotor 46 and driven in rotation by the latter.
  • a prefilter 76 is arranged between the bottom 22 and the bottom 11 of the storage tank 10. During the operation of the delivery unit 30, fuel is drawn in from the storage tank 10 through the pre-filter 76 and the suction opening 72 by the pre-stage pump part 34 and is conveyed through the outlet opening 74 into the storage container 14.
  • the main stage pump part 38 is designed as a separate structural unit which is connected, for example, to the cover part 44.
  • the main stage pump part 38 has a pump housing with a cup-shaped housing part 80 and a cover 81 which are connected to one another and which delimit between them a pump chamber 82 in which a conveying element 84 is arranged.
  • the shaft 48 of the drive motor 32 projects into the pump chamber 82 and is connected there in a rotationally locking manner to the conveying element 84, so that the latter is driven in rotation by the shaft 48.
  • the Main stage pump part 38 is designed, for example, as a side channel pump, the delivery member 84 of which is an impeller which has a plurality of blades 85 spaced apart from one another in the circumferential direction on one or both end faces.
  • a partially annular conveyor channel 86, 87 opposite the blades 85 is formed in the end faces thereof facing the impeller 84.
  • a suction opening 88 opens into the conveying channel 87 in the cover 81 at its start region pointing counter to the direction of rotation 47 of the impeller 84 and an outlet opening 89 in its end region pointing counter to the direction of rotation 47 of the impeller 84 be trained.
  • the main stage pump part 38 can also use the rotor 46 as a conveying member as a separate structural unit and / or the cover part 44 of the housing 36 can form the housing for the main stage pump part 38 in whole or in part.
  • the cover part 44 of the housing 36 of the delivery unit 30 has in its central region a recess 90, into which the main stage pump part 38 is inserted.
  • the main stage pump part 38 at least only partially protrudes from the recess 90 in the direction of the axis of rotation 50 of the rotor 46.
  • the main stage pump part 38 delivers fuel from the storage container 14 to the internal combustion engine 12 when the delivery unit 30 is operating.
  • a fuel filter 92 through which the fuel delivered by the main stage pump part 38 to the internal combustion engine 12 flows, is arranged between the flange 20 and the delivery unit 30.
  • a nozzle 94 is formed, which is connected to the outlet opening 89 and which is directly or is connected via a line to the inlet of the fuel filter 92.
  • the storage container 14 with the one-piece bottom 40 and the one-piece peripheral wall 42 for the housing 36 of the conveying unit 30 can, for example, consist of fuel-resistant plastic and can be produced by injection molding.
  • the base 40 and the peripheral wall 42 as well as the elevations 62 and 64 with the delivery channel 70 can be formed in a simple manner by an appropriately designed injection molding tool.
  • the storage container 14 can also consist of metal, in particular light metal.

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

Abstract

The invention relates to a device comprising a well-shaped reservoir (14), located in a storage tank (10). Said reservoir contains a delivery unit (30) comprising an electric drive motor (32) and at least one pump element (34), which are mounted in a common housing (36). The pump element (34) has a delivery member (46) that is located in a pump chamber (65) and driven in a rotational manner by the drive motor (32). The housing (36) of the delivery unit (30) is at least partially configured in one piece with the reservoir (14) and preferably has a base (40) and a peripheral wall (42) that are configured in one piece with said reservoir (14). The housing (36) for the delivery unit (30) can thus be manufactured together with the reservoir (14) in one production step.

Description

Vorrichtung zum Fördern von Kraftstoff aus einem Vorratstank zu einer Brennkraftmaschine eines KraftfahrzeugsDevice for delivering fuel from a storage tank to an internal combustion engine of a motor vehicle
Stand der TechnikState of the art
Die Erfindung geht aus von einer Vorrichtung zum Fördern von Kraftstoff aus einem Vorratstank zu einer Brennkraftmaschine eines Kraftfahrzeugs nach der Gattung des Anspruchs 1.The invention is based on a device for conveying fuel from a storage tank to an internal combustion engine of a motor vehicle according to the preamble of claim 1.
Eine solche Vorrichtung ist durch die DE 44 26 946 AI bekannt . Diese Vorrichtung weist einen im Vorratstank angeordneten topfförmigen Staubehälter auf, in dem ein Förderaggregat angeordnet ist . Das Förderaggregat weist einen elektrischen Antriebsmotor und einen Pumpenteil auf . Der Pumpenteil weist ein in einer Pumpenkammer angeordnetes, durch den Antriebsmotor rotierend angetriebenes Förderglied auf. Der Antriebsmotor und der Pumpenteil sind in einem gemeinsamen Gehäuse angeordnet . Das Förderaggregat bildet eine komplette Baueinheit, die für sich funktionsfähig ist und in den Staubehälter eingesetzt und in diesem gehalten ist . Diese bekannte Vorrichtung zum Fördern von Kraftstoff erfordert wegen der separaten Ausführung des Förderaggregats einen großen Herstellungs- und Montageaufwand, da das Förderaggregat für sich montiert werden muß und anschließend im Staubehälter montiert und in diesem befestigt werden muß. Vorteile der ErfindungSuch a device is known from DE 44 26 946 AI. This device has a pot-shaped storage container arranged in the storage tank, in which a conveyor unit is arranged. The conveyor unit has an electric drive motor and a pump part. The pump part has a conveying member which is arranged in a pump chamber and is driven in rotation by the drive motor. The drive motor and the pump part are arranged in a common housing. The conveying unit forms a complete structural unit that is functional on its own and is inserted in and held in the storage container. This known device for conveying fuel requires a large manufacturing and assembly costs because of the separate design of the delivery unit, since the delivery unit must be assembled for itself and then assembled in the storage container and fastened in this. Advantages of the invention
Die erfindungsgemäße Vorrichtung mit den Merkmalen gemäß Anspruch 1 hat demgegenüber den Vorteil, daß deren Herstellung und Montage vereinfacht sind, indem das Gehäuse des Förderaggregats zumindest teilweise einstückig mit dem Staubehälter ausgebildet ist. Das Gehäuse des Förderaggregats kann zusammen mit dem Staubehälter in einem Herstellungsschritt gefertigt werden.The device according to the invention with the features according to claim 1 has the advantage that its manufacture and assembly are simplified in that the housing of the conveyor unit is at least partially integrally formed with the storage container. The housing of the conveyor unit can be manufactured together with the storage container in one manufacturing step.
In den abhängigen Ansprüchen sind vorteilhafte Ausgestaltungen und Weiterbildungen der erfindungsgemäßen Vorrichtung angegeben.Advantageous refinements and developments of the device according to the invention are specified in the dependent claims.
Zeichnungdrawing
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert . Es zeigen Figur 1 eine Vorrichtung zum Fördern von Kraftstoff aus einem Vorratstank zu einer Brennkraftmaschine eines Kraftfahrzeugs mit einem Förderaggregat und Figur 2 das Förderaggregat in einem Querschnitt entlang Linie II-II in Figur 1.An embodiment of the invention is shown in the drawing and explained in more detail in the following description. FIG. 1 shows a device for conveying fuel from a storage tank to an internal combustion engine of a motor vehicle with a delivery unit, and FIG. 2 shows the delivery unit in a cross section along line II-II in FIG. 1.
Beschreibung des AusführungsbeispielsDescription of the embodiment
In Figur 1 ist eine Vorrichtung zum Fördern von Kraftstoff aus einem Vorratstank 10 zu einer Brennkraftmaschine 12 eines Kraftfahrzeugs dargestellt . Die Brennkraftmaschine 12 weist eine Einspritzanlage auf, durch die Kraftstoff in die Zylinder der Brennkraftmaschine eingespritzt wird. Die Vorrichtung weist einen im Vorratstank 10 angeordneten topfförmigen Staubehälter 14 auf, der gegenüber dem Vorratstank 10 ein wesentlich kleineres Volumen besitzt. Der Staubehälter 14 ist an seiner Oberseite offen ausgebildet und sitzt mit seinem unteren Ende auf dem Boden 11 des Vorratstanks 10 auf. Der Vorratstank 10 weist in einer oberen Wand 16 eine Öffnung 18 auf, durch die der Staubehälter 14 in den Vorratstank 10 einsetzbar ist und die anschließend mit einem Flansch 20 verschlossen wird.FIG. 1 shows a device for delivering fuel from a storage tank 10 to an internal combustion engine 12 of a motor vehicle. The internal combustion engine 12 has an injection system through which fuel is injected into the cylinders of the internal combustion engine. The device has a pot-shaped storage container 14 arranged in the storage tank 10, which has a substantially smaller volume than the storage tank 10. The storage container 14 is open at its top and sits with its lower end on the bottom 11 of the storage tank 10. The storage tank 10 has an opening 18 in an upper wall 16, through which the storage container 14 can be inserted into the storage tank 10 and which is then closed with a flange 20.
Der Staubehälter 14 weist einen Boden 22 und eine einstückig von diesem nach oben abstehende Umfangswand 24 auf . Der Boden 22 des Staubehälters 14 ist mit Abstand zum Boden 11 des Vorratstanks 10 angeordnet . Der Staubehälter 14 kann im Querschnitt rund oder mit beliebiger anderer Form ausgebildet sein.The storage container 14 has a bottom 22 and a peripheral wall 24 protruding in one piece therefrom. The bottom 22 of the storage container 14 is arranged at a distance from the bottom 11 of the storage tank 10. The storage container 14 can be round in cross section or can be of any other shape.
Im Staubehälter 14 ist ein Förderaggregat 30 angeordnet, durch das Kraftstoff aus dem Staubehälter 14 zur Brennkraftmasσhine 12 gefördert wird. Das Förderaggregat 30 weist einen elektrischen Antriebsmotor 32 auf, der als bürstenloser Gleichstrommotor ausgebildet ist-. Das Förderaggregat 30 weist einen Vorstufenpumpenteil 34 auf, der mit dem Antriebsmotor 32 in einem gemeinsamen Gehäuse 36 angeordnet ist, das zumindest teilweise einstückig mit dem Staubehälter 14 ausgebildet ist. Das Förderaggregat 30 weist außerdem einen Hauptstufenpumpenteil 38 auf, der außerhalb des Gehäuses angeordnet ist. Das Gehäuse 36 des Förderaggregats 30 weist einen Boden 40 auf, der einstückig mit dem Boden 22 des Staubehälters 14 ausgebildet ist. Das Gehäuse 36 weist außerdem eine Umfangswand 42 auf, die einstückig vom Boden 22 des Staubehälters 14 innerhalb von dessen Umfangswand 24 nach oben absteht. Die Oberseite des Gehäuses 36 ist mittels eines separaten Deckelteils 44 verschlossen, das mit der Umfangswand 42 verbunden ist.In the storage container 14, a delivery unit 30 is arranged, through which fuel is conveyed from the storage container 14 to the internal combustion engine 12. The conveyor unit 30 has an electric drive motor 32, which is designed as a brushless DC motor. The conveying unit 30 has a pre-stage pump part 34 which is arranged with the drive motor 32 in a common housing 36 which is at least partially formed in one piece with the storage container 14. The delivery unit 30 also has a main stage pump part 38, which is arranged outside the housing. The housing 36 of the conveyor assembly 30 has a base 40 which is formed in one piece with the base 22 of the storage container 14. The housing 36 also has a peripheral wall 42 which protrudes in one piece from the bottom 22 of the storage container 14 within its peripheral wall 24 upwards. The top of the housing 36 is closed by means of a separate cover part 44 which is connected to the peripheral wall 42.
Der Antriebsmotor 32 weist einen scheibenförmigen Rotor 46 auf, der über eine Welle 48 um eine Achse 50 drehbar im Gehäuse 36 gelagert ist. Die Welle 48 ist drehfest mit dem Rotor 46 verbunden und einerseits über eine Lagerschale 51 in einer Bohrung 52 im Boden 40 des Gehäuses 36 und andererseits über eine Lagerschale 53 in einer Bohrung 54 im Deckelteil 44 drehbar gelagert. Am Außenmantel des Rotors 46 sind über dessen Umfang verteilt mehrereThe drive motor 32 has a disk-shaped rotor 46 which is mounted in the housing 36 so as to be rotatable about an axis 50 via a shaft 48. The shaft 48 is rotatable with the Rotor 46 connected and rotatably supported on the one hand via a bearing shell 51 in a bore 52 in the bottom 40 of the housing 36 and on the other hand via a bearing shell 53 in a bore 54 in the cover part 44. On the outer shell of the rotor 46 are distributed over its circumference
Permanentmagnetsegmente 56 angeordnet. Der Rotor 46 ist an seinem Umfang von einem Stator 58 umgeben, der in die Umfangswand 42 eingesetzt ist und der Kerne 59 mit Spulenwicklungen 60 aufweist. Die Kerne 59 des Stators 58 weisen in Richtung der Drehachse 50 etwa dieselbe Erstreckung auf wie der Rotor 46. Die Spulenwicklungen 60 überragen die Kerne 59 in Richtung der Drehachse 50 des Rotors 46. Der Boden 40 des Gehäuses 36 weist eine etwa zentrale Erhebung 62 auf, wodurch ein zwischen der Erhebung 62 und der Umfangswand 42 angeordneter Ringraum 63 gebildet ist, in dem die nach unten weisenden Teile der Spulenwicklungen 60 des Stators 58 angeordnet sind. Von der Erhebung 62 des Bodens 40 des Gehäuses 36 steht etwa zentral eine weitere Erhebung 64 nach oben ab.Permanent magnet segments 56 arranged. The rotor 46 is surrounded on its circumference by a stator 58 which is inserted into the circumferential wall 42 and which has cores 59 with coil windings 60. The cores 59 of the stator 58 have approximately the same extent in the direction of the axis of rotation 50 as the rotor 46. The coil windings 60 protrude beyond the cores 59 in the direction of the axis of rotation 50 of the rotor 46. The bottom 40 of the housing 36 has an approximately central elevation 62 , whereby an annular space 63 is arranged between the elevation 62 and the peripheral wall 42, in which the downward-pointing parts of the coil windings 60 of the stator 58 are arranged. From the elevation 62 of the bottom 40 of the housing 36, another elevation 64 protrudes approximately centrally.
Der Vorstufenpumpenteil 34 weist ein vom Rotor 46 rotierend angetriebenes Förderglied auf, das beispielsweise vom Rotor 46 selbst gebildet ist. Der Rotor 46 ist in einer Pumpenkammer 65 angeordnet und weist in seinem zentralen Bereich zumindest in seiner dem Boden 40 zugewandten Stirnseite eine Ausnehmung 66 auf, wodurch die Dicke des Rotors 46 in Richtung der Drehachse 50 betrachtet in dessen zentralem Bereich geringer ist als an dessen Umfang. Die Erhebung 64 des Bodens 40 des Gehäuses 30 ragt in die Ausnehmung 66 des Rotors 46 hinein. Der Rotor 46 weist an seiner der Erhebung 64 zugewandten Stirnseite einen Kranz von in Umfangsrichtung zueinander beabstandeten Schaufeln 68 auf. Die Erhebung 64 des Bodens 40 des Gehäuses 36 bildet eine Begrenzung der Pumpenkammer 65 in Richtung der Drehachse 50 des Rotors 46. In der dem Rotor 46 zugewandten Stirnseite der Erhebung 64 ist dem Schaufelkranz 68 des Rotors 46 gegenüberliegend ein teilringförmiger Förderkanal 70 ausgebildet. Im Boden 40 des Gehäuses 36 ist eine Ansaugöffnung 72 ausgebildet, die im Bereich eines entgegen Umlaufrichtung 47 des Rotors 46 weisenden Anfangs des Förderkanals 70 in den Förderkanal 70 mündet. Von einem in Umlaufrichtung 47 des Rotors 46 weisenden Endbereich des Förderkanals 70 führt eine Auslaßöffnung 74 ab, die ebenfalls im Boden 40 ausgebildet sein kann. Der Vorstufenpumpenteil 34 ist somit als Seitenkanalpumpe ausgebildet. Der Vorstufenpumpenteil 34 kann alternativ jedoch auch beispielsweise als Peripheralpumpe, als Zahnradpumpe oder als Rollenzellenpumpe ausgebildet sein. Das Förderglied des Vorstufenpumpenteils 34 kann außerdemauch getrennt vom Rotor 46 ausgebildet sein und von diesem rotierend angetrieben werden.The pre-stage pump part 34 has a conveyor member which is driven in rotation by the rotor 46 and which is formed, for example, by the rotor 46 itself. The rotor 46 is arranged in a pump chamber 65 and has a recess 66 in its central region, at least in its end face facing the bottom 40, as a result of which the thickness of the rotor 46, viewed in the direction of the axis of rotation 50, is smaller in its central region than on its circumference , The elevation 64 of the bottom 40 of the housing 30 protrudes into the recess 66 of the rotor 46. The rotor 46 has on its end face facing the elevation 64 a ring of blades 68 spaced apart in the circumferential direction. The elevation 64 of the bottom 40 of the housing 36 forms a boundary of the pump chamber 65 in the direction of the axis of rotation 50 of the rotor 46. In the direction facing the rotor 46 A partially annular conveyor channel 70 is formed opposite the blade ring 68 of the rotor 46 on the front side of the elevation 64. In the bottom 40 of the housing 36, a suction opening 72 is formed, which opens into the delivery channel 70 in the region of an beginning of the delivery channel 70 pointing in the opposite direction 47 of the rotor 46. An outlet opening 74 leads from an end region of the conveying channel 70 pointing in the direction of rotation 47 of the rotor 46, which outlet opening can also be formed in the bottom 40. The preliminary stage pump part 34 is thus designed as a side channel pump. However, the preliminary stage pump part 34 can alternatively also be designed, for example, as a peripheral pump, as a gear pump or as a roller cell pump. The feed member of the pre-stage pump part 34 can also be formed separately from the rotor 46 and driven in rotation by the latter.
In einem unteren Endbereich des Staubehälters 14 ist zwischen dessen Boden 22 und dem Boden 11 des Vorratstanks 10 ein Vorfilter 76 angeordnet. Während des Betriebs des Förderaggregats 30 wird durch den Vorstufenpumpenteil 34 Kraftstoff aus dem Vorratstank 10 durch das Vorfilter 76 und die Ansaugδffnung 72 angesaugt und durch die Auslaßöffnung 74 in den Staubehälter 14 gefördert .In a lower end region of the storage container 14, a prefilter 76 is arranged between the bottom 22 and the bottom 11 of the storage tank 10. During the operation of the delivery unit 30, fuel is drawn in from the storage tank 10 through the pre-filter 76 and the suction opening 72 by the pre-stage pump part 34 and is conveyed through the outlet opening 74 into the storage container 14.
Der Hauptstufenpumpenteil 38 ist als separate Baueinheit ausgebildet, die beispielsweise mit dem Deckelteil 44 verbunden ist. Der Hauptstufenpumpenteil 38 weist ein Pumpengehäuse mit einem topfförmigen Gehäuseteil 80 und einem Deckel 81 auf, die miteinander verbunden sind und die zwischen sich eine Pumpenkammer 82 begrenzen, in der ein Fδrderglied 84 angeordnet ist. Die Welle 48 des Antriebsmotors 32 ragt in die Pumpenkammer 82 hinein und ist dort drehschlüssig mit dem Förderglied 84 verbunden, so daß dieses durch die Welle 48 rotierend angetrieben wird. Der Hauptstufenpumpenteil 38 ist beispielsweise als Seitenkanalpumpe ausgebildet, wobei dessen Förderglied 84 ein Laufrad ist, das an einer oder beiden Stirnseiten jeweils eine Vielzahl von in Umfangsrichtung zueinander beabstandeten Schaufeln 85 aufweist. Im Gehäuseteil 80 und im Deckel 81 ist in deren dem Laufrad 84 zugewandten Stirnseiten jeweils ein den Schaufeln 85 gegenüberliegender teilringförmiger Fδrderkanal 86,87 ausgebildet. In den Förderkanal 87 im Deckel 81 mündet an dessen entgegen Umlaufrichtung 47 des Laufrads 84 weisendem Anfangsbereich eine Ansaugöffnung 88 und in dessen in Umlaufrichtung 47 des Laufrads 84 weisendem Endbereich eine Auslaßöffnung 89. Der Hauptstufenpumpenteil 38 kann alternativ auch als Peripheralpumpe, als Zahnradpumpe oder als Rollenzellenpumpe ausgebildet sein. Der Hauptstufenpumpenteil 38 kann abweichend zu der vorstehend beschriebenen Ausführung als separate Baueinheit auch den Rotor 46 als Förderglied mitnutzen und/oder der Deckelteil 44 des Gehäuses 36 kann ganz oder teilweise das Gehäuse für den Hauptstufenpumpenteil 38 bilden.The main stage pump part 38 is designed as a separate structural unit which is connected, for example, to the cover part 44. The main stage pump part 38 has a pump housing with a cup-shaped housing part 80 and a cover 81 which are connected to one another and which delimit between them a pump chamber 82 in which a conveying element 84 is arranged. The shaft 48 of the drive motor 32 projects into the pump chamber 82 and is connected there in a rotationally locking manner to the conveying element 84, so that the latter is driven in rotation by the shaft 48. The Main stage pump part 38 is designed, for example, as a side channel pump, the delivery member 84 of which is an impeller which has a plurality of blades 85 spaced apart from one another in the circumferential direction on one or both end faces. In the housing part 80 and in the cover 81, a partially annular conveyor channel 86, 87 opposite the blades 85 is formed in the end faces thereof facing the impeller 84. A suction opening 88 opens into the conveying channel 87 in the cover 81 at its start region pointing counter to the direction of rotation 47 of the impeller 84 and an outlet opening 89 in its end region pointing counter to the direction of rotation 47 of the impeller 84 be trained. In contrast to the embodiment described above, the main stage pump part 38 can also use the rotor 46 as a conveying member as a separate structural unit and / or the cover part 44 of the housing 36 can form the housing for the main stage pump part 38 in whole or in part.
Der Deckelteil 44 des Gehäuses 36 des Förderaggregats 30 weist in seinem zentralen Bereich eine Vertiefung 90 auf, in die der Hauptstufenpumpenteil 38 eingesetzt ist. Der Hauptstufenpumpenteil 38 ragt zumindest nur teilweise in Richtung der Drehachse 50 des Rotors 46 aus der Vertiefung 90 heraus. Durch den Hauptstufenpumpenteil 38 wird beim Betrieb des Förderaggregats 30 Kraftstoff aus dem Staubehälter 14 zur Brennkraftmaschine 12 gefördert . Zwischen dem Flansch 20 und dem Förderaggregat 30 ist ein Kraftstoffilter 92 angeordnet, das der vom Hauptstufenpumpenteil 38 zur Brennkraftamschine 12 geförderte Kraftstoff durchströmt. Am Deckel 81 des Hauptstufenpumpenteils 38 ist ein Stutzen 94 angeformt, der mit der Auslaßöffnung 89 verbunden ist und der direkt oder über eine Leitung mit dem Zulauf des Kraftstoffilters 92 verbunden ist.The cover part 44 of the housing 36 of the delivery unit 30 has in its central region a recess 90, into which the main stage pump part 38 is inserted. The main stage pump part 38 at least only partially protrudes from the recess 90 in the direction of the axis of rotation 50 of the rotor 46. The main stage pump part 38 delivers fuel from the storage container 14 to the internal combustion engine 12 when the delivery unit 30 is operating. A fuel filter 92, through which the fuel delivered by the main stage pump part 38 to the internal combustion engine 12 flows, is arranged between the flange 20 and the delivery unit 30. On the cover 81 of the main stage pump part 38, a nozzle 94 is formed, which is connected to the outlet opening 89 and which is directly or is connected via a line to the inlet of the fuel filter 92.
Der Staubehälter 14 mit dem einstückigen Boden 40 und der einstückigen Umfangswand 42 für das Gehäuse 36 des Förderaggregats 30 kann beispielsweise aus kraftstoffbeständigem Kunststoff bestehen und durch Spritzgießen hergestellt werden. Hierbei können auf einfache Weise der Boden 40 und die Umfangswand 42 sowie die Erhebungen 62 und 64 mit dem Förderkanal 70 durch ein entsprechend ausgebildetes Spritzgießwerkzeug geformt werden. Der Staubehälter 14 kann auch aus Metall, insbesondere Leichtmetall bestehen. The storage container 14 with the one-piece bottom 40 and the one-piece peripheral wall 42 for the housing 36 of the conveying unit 30 can, for example, consist of fuel-resistant plastic and can be produced by injection molding. Here, the base 40 and the peripheral wall 42 as well as the elevations 62 and 64 with the delivery channel 70 can be formed in a simple manner by an appropriately designed injection molding tool. The storage container 14 can also consist of metal, in particular light metal.

Claims

Ansprüche Expectations
1. Vorrichtung zum Fördern von Kraftstoff aus einem Vorratstank (10) zu einer Brennkraftmaschine (12) eines Kraftfahrzeugs, mit einem im Vorratstank (10) angeordneten topfförmigen Staubehälter (14) , mit einem im Staubehälter1. Device for conveying fuel from a storage tank (10) to an internal combustion engine (12) of a motor vehicle, with a pot-shaped storage container (14) arranged in the storage tank (10), with one in the storage container
(14) angeordneten Förderaggregat (30) , das einen elektrischen Antriebsmotor (32) und wenigstens einen Pumpenteil (34) aufweist, die in einem gemeinsamen Gehäuse(14) arranged conveyor unit (30), which has an electric drive motor (32) and at least one pump part (34), which are in a common housing
(36) angeordnet sind, wobei der Pumpenteil (34) ein in einer Pumpenkammer (65) angeordnetes, durch den Antriebsmotor (32) rotierend angetriebenes Förderglied (46) aufweist, dadurch gekennzeichnet, daß das Gehäuse (36) des Förderaggregats(36) are arranged, the pump part (34) having a conveying member (46) arranged in a pump chamber (65) and rotatingly driven by the drive motor (32), characterized in that the housing (36) of the conveying unit
(30) zumindest teilweise einstückig mit dem Staubehälter (14) ausgebildet ist.-(30) is formed at least partially in one piece with the storage container (14).
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Gehäuse (36) des Förderaggregats (30) einen Boden (40) und eine Umfangswand (42) aufweist, die einstückig mit dem Staubehälter (14) ausgebildet sind.2. Device according to claim 1, characterized in that the housing (36) of the conveyor unit (30) has a bottom (40) and a peripheral wall (42) which are integrally formed with the storage container (14).
3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Umfangswand (42) des Gehäuses (36) des Förderaggregats (30) von einer Umfangswand (24) des Staubehälters (14) umgeben ist .3. Apparatus according to claim 2, characterized in that the peripheral wall (42) of the housing (36) of the conveyor unit (30) is surrounded by a peripheral wall (24) of the storage container (14).
4. Vorrichtung nach Anspruch 2 oder 3 , dadurch gekennzeichnet, daß der Boden (40) des Gehäuses (36) des Förderaggregats (30) die Pumpenkammer (65) in Richtung der Drehachse (50) des Förderglieds (46) begrenzt.4. Apparatus according to claim 2 or 3, characterized in that the bottom (40) of the housing (36) of the Delivery unit (30) limits the pump chamber (65) in the direction of the axis of rotation (50) of the delivery member (46).
5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß der Boden (40) eine Erhebung (64) aufweist, die die Pumpenkammer (65) in Richtung der Drehachse (50) des Förderglieds (46) begrenzt.5. The device according to claim 4, characterized in that the bottom (40) has an elevation (64) which limits the pump chamber (65) in the direction of the axis of rotation (50) of the conveying member (46).
6. Vorrichtung nach Anspruch 4 oder 5, dadurch gekennzeichnet, daß im Boden (40) des Gehäuses (36) in dessen dem Förderglied (46) zugewandter Stirnseite wenigstens ein teilringfδrmiger Förderkanal (70) ausgebildet ist und daß das Förderglied (46) als Laufrad ausgebildet ist, das zumindest an seiner dem Boden (40) zugewandten Stirnseite dem Förderkanal (70) gegenüberliegend einen Kranz von in Umfangsrichtung zueinander beabstandeten Schaufeln6. Apparatus according to claim 4 or 5, characterized in that in the bottom (40) of the housing (36) in the end face of the conveying member (46) facing at least one partially annular feed channel (70) is formed and that the conveying member (46) as an impeller is formed that at least on its end face facing the bottom (40) opposite the conveying channel (70) is a ring of blades spaced apart from one another in the circumferential direction
(68) aufweist.(68).
7. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß im Boden (40) des Gehäuses (36) wenigstens eine in den Förderkanal (70) mündende Ansaugöffnung (72) ausgebildet ist .7. The device according to claim 6, characterized in that in the bottom (40) of the housing (36) at least one in the delivery channel (70) opening suction opening (72) is formed.
8. Vorrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß das Gehäuse (36) des Fδrderaggregats (30) mittels eines separaten Deckelteils (44) verschlossen ist, an dem eine weitere Pumpenstufe (38) angeordnet ist .8. Device according to one of the preceding claims, characterized in that the housing (36) of the delivery unit (30) is closed by means of a separate cover part (44) on which a further pump stage (38) is arranged.
9. Vorrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß der Staubehälter (14) mit dem einstückigen Gehäuse (36) des Fδrderaggregats (30) durch Spritzgießen, vorzugsweise aus Kunststoff hergestellt ist. 9. Device according to one of the preceding claims, characterized in that the storage container (14) with the one-piece housing (36) of the conveying unit (30) is made by injection molding, preferably made of plastic.
PCT/DE2001/003262 2000-09-01 2001-08-25 Device for delivering fuel from a storage tank to an internal combustion engine of a motor vehicle WO2002018774A1 (en)

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DE10043069.4 2000-09-01
DE2000143069 DE10043069A1 (en) 2000-09-01 2000-09-01 Device for delivering fuel from a storage tank to an internal combustion engine of a motor vehicle

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