EP0921299B1 - Device for sealing a fuel pumping device in a fuel tank - Google Patents

Device for sealing a fuel pumping device in a fuel tank Download PDF

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Publication number
EP0921299B1
EP0921299B1 EP98121686A EP98121686A EP0921299B1 EP 0921299 B1 EP0921299 B1 EP 0921299B1 EP 98121686 A EP98121686 A EP 98121686A EP 98121686 A EP98121686 A EP 98121686A EP 0921299 B1 EP0921299 B1 EP 0921299B1
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EP
European Patent Office
Prior art keywords
tank
fuel
flange
cover
cup
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EP98121686A
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German (de)
French (fr)
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EP0921299A2 (en
EP0921299A3 (en
Inventor
Stephan Kleppner
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication of EP0921299A3 publication Critical patent/EP0921299A3/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00Apparatus 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
    • F02M37/04Feeding by means of driven pumps
    • F02M37/08Feeding by means of driven pumps electrically driven
    • F02M37/10Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir
    • F02M37/106Feeding 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 relates to a device for sealing a usable in a fuel tank Fuel delivery unit according to the preamble of claim 1.
  • a known Solution as e.g. is known from DE 44 44 854 A1, the fuel delivery unit arranged in a pot and inserted into a fuel tank.
  • US 4,672,937 relates to a fuel pump.
  • the fuel pump is in one Fuel tank let in. There are line connections in the cover area of the fuel pump guided by this, which provided with double seals on the inside and the outside are.
  • the fuel delivery unit is in a tubularly configured chamber embedded, which in turn by means of a spiral spring to the bottom of a fuel tank is employed.
  • FR 2 062 303 A shows a fuel delivery device which is connected to a tank flange a vibration membrane is attached.
  • the vibration membrane Vibration transmission between the tank of the motor vehicle and the conveyor avoided.
  • the vibration membrane is screwable by means of an annular Clamping ring attached to a plate of the fuel tank and is via a coil spring element hired to a fuel delivery unit.
  • the fuel delivery unit which after insertion into a fuel tank is sealed from this as one compact unit formed in a housing, which within a Pot is added.
  • the pot is covered by a cover which at least one inlet connection and an E-connection of the compact Are passed through, the pot with the unit by means of a Tank insert closure that can be attached to a tank flange in the fuel tank can be used.
  • a Tank insert closure that can be attached to a tank flange in the fuel tank can be used.
  • an elastic bellows element is arranged on the tank flange.
  • a the bellows element on the cover and against the tank insert closure pressing spring is provided which presses the pot against the bottom of the tank suppressed. It is also possible that the pot is at the bottom of the fuel tank is attached.
  • the cover pressing spring By means of on the one hand against the tank insert closure and on the other hand against the cover pressing spring ensures that the fuel delivery unit is pressed against the bottom of the tank.
  • This Flexible and spring-loaded sealing device is the height of the pot and thus the connection geometry largely independent of the tank height. This makes it possible to use standard solutions without special constructions, for example for the connection to the flange, used according to customer wishes or customer requirements Need to become.
  • the bellows element is preferably on the pot and on the tank flange attached.
  • the bellows element solution according to the invention also provides a inexpensive solution because it is independent of the tank height and the tank geometry can be used for numerous applications.
  • the bellows element is in the fuel tank inserted and fastened tank insert closure between the Tank flange and an annular flange held on the tank insert closure.
  • the ring flange is pressed against the inside of the cover by the spring of the tank insert closure, the ring flange being a circumferential Has nose.
  • the bellows element On the side of the ring flange facing the tank flange the bellows element is supported or clamped from its nose, while on the inward side of the nose of the ring flange the spring is supported.
  • the bellows element is by means of the Spring stretchable or compressible against the action of spring force, that the pot when inserted and fastened in the fuel tank Tank insert closure on the tank flange of the fuel tank opposite wall essentially abuts. This is usually the case Tank bottom. However, it is also possible that between the bottom of the pot Fuel delivery unit and the tank bottom another, if necessary there is also elastic support.
  • the bellows element is preferably made of rubber.
  • the tank insert closure is preferably on the tank flange by means of a Screwable thread. Since the bellows element has an outer flange, which between the part of the ring flange facing outwards from the nose and the tank flange when screwing on the cover of the tank insert cap depending on the screwing force, is held on this point with a corresponding clamping effect by screwing the Tank insert closure achieved the appropriate sealing effect.
  • the E connection is integrated Plug formed in the cover.
  • the plug is preferably in the cover is fully integrated, i.e. in the case of training the Rubber cover vulcanized into the cover.
  • the electrical connection is also cast into the cover, so that the connection cables passed through the cover are sufficiently tight is sealed.
  • the figure shows the device according to the invention for sealing an in a fuel tank used fuel delivery unit.
  • the fuel delivery unit 2 is used in a fuel tank 1, the actual fuel delivery unit 2 having a housing 3 and is surrounded by a pot 4.
  • the fuel delivery unit points hydraulic connections for feeding uncleaned and for draining of cleaned fuel and an electrical connection for supply of the electric motor of the fuel delivery unit 2 with drive energy for Driving the fuel delivery pump of the fuel delivery unit 2.
  • the pot 4 is provided with a cover 5, which i.a. for reasons the space saving essentially complies with the hydraulic connections of the fuel delivery unit 2 is formed.
  • the cover 5 has on it directed towards the upper edges of the pot Outside an angular recess so that a substantially radially extending flange section and a substantially axially extending Flange section are formed on the cover.
  • the terms “Radial” and “axial” refer to the axis of rotation of the electric motor of the fuel delivery unit.
  • the cover has at least two bushings: a bushing for an inlet connection 6 and a bushing for an E connection 7.
  • the E-connector 7 is through a cover 5 penetrating Cable or formed by several cables, the cables in the Cover are integrated so that reliable tightness is guaranteed is.
  • the cover 5 is designed such that they are essentially over the entire length of the inlet connection 6 this is arranged enveloping.
  • the area of the connection end of the inlet connection 6 on the fuel delivery unit 2 is reliable for reasons of Tightness between the cover 5 and the outer circumference of the an O-ring 14 is provided at the lower end of the inlet connector 6.
  • a tank flange 8 is provided, which has an external thread.
  • On the inner surface in the The area of the bend of the tank insert closure 9 is an annular flange 12 provided, which by an essentially in an axial Direction of the fuel delivery unit 2 nose in two areas is divided.
  • the one facing the bend of the tank insert closure 9 Part of the ring flange 12 clamps in the screwed to the tank flange 8 State an outward-facing flange portion of a Bellows element 10, which is seen on it in the axial direction opposite side has a radially inward flange. This inward flange is designed to open the outside of the radial flange portion of the cover 5 fits snugly.
  • the spring 11 also causes the fuel delivery unit 2 to the tank wall 13 is pressed, which of those carrying the tank flange 8 Wall of the fuel tank 1 is opposite.
  • the electrical connection lines from the electric motor of the fuel delivery unit 2 are from its direct connection to one in the Cover 5 integrated, preferably injected tab connector.
  • the corresponding connectors are then on this flat connector connected.
  • the device according to the invention for sealing a in a fuel tank 1 usable fuel delivery unit 2 thus delivers in addition a uniform sealing effect at different tank heights themselves taking into account tank breathing due to temperature and / or Pressure differences a reliable and sufficient sealing effect.

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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)

Description

Stand der TechnikState of the art

Die Erfindung betrifft eine Vorrichtung zum Abdichten eines im einen Kraftstofftank einsetzbaren Kraftstoff-Förderaggregates gemäß Oberbegriff von Anspruch 1. Bei einer bekannten Lösung, wie sie z.B. aus DE 44 44 854 A1 bekannt ist, wird das Kraftstoff-Förderaggregat in einem Topf angeordnet und in einen Kraftstofftank eingesetzt.The invention relates to a device for sealing a usable in a fuel tank Fuel delivery unit according to the preamble of claim 1. In a known Solution as e.g. is known from DE 44 44 854 A1, the fuel delivery unit arranged in a pot and inserted into a fuel tank.

US 4,672,937 bezieht sich auf eine Kraftstoffpumpe. Die Kraftstoffpumpe ist in einem Kraftstofftank eingelassen. Im Deckelbereich der Kraftstoffpumpe sind Leitungsanschlüsse durch diesen geführt, die mit Doppeldichtungen auf der Innenseite und der Außenseite versehen sind. Das Kraftstoff-Förderaggregat ist in eine rohrförmig konfigurierte Kammer eingelassen, die ihrerseits mittels einer Spiralfeder an den Boden eines Kraftstofftankes angestellt wird.US 4,672,937 relates to a fuel pump. The fuel pump is in one Fuel tank let in. There are line connections in the cover area of the fuel pump guided by this, which provided with double seals on the inside and the outside are. The fuel delivery unit is in a tubularly configured chamber embedded, which in turn by means of a spiral spring to the bottom of a fuel tank is employed.

FR 2 062 303 A zeigt eine Kraftstoff-Fördereinrichtung, die an einen Tankflansch mittels einer Schwingungsmembran befestigt ist. Mittels der Schwingungsmembran wird die Schwingungsübertragung zwischen dem Tank des Kraftfahrzeuges und der Fördereinrichtung vermieden. Die Schwingungsmembran ist mitttels eines ringförmigen verschraubbaren Klemmrings an einer Platte des Kraftstofftankes befestigt und wird über ein Spiralfederelement an ein Kraftstoff-Förderaggregat angestellt.FR 2 062 303 A shows a fuel delivery device which is connected to a tank flange a vibration membrane is attached. By means of the vibration membrane Vibration transmission between the tank of the motor vehicle and the conveyor avoided. The vibration membrane is screwable by means of an annular Clamping ring attached to a plate of the fuel tank and is via a coil spring element hired to a fuel delivery unit.

Für die hydraulischen Verbindungen vom Kraftstoff-Förderaggregat zu dem Deckel, welcher in der Regel an einem Tankflansch einer Tanköffnung zum Einsetzen des Kraftstoff-Förderaggregates zusammen mit dem Topf befestigt wird, werden schwimmende Lösungen bevorzugt, bei welchen mittels O-Ringen eine Abdichtung erzielt werden soll. Aufgrund der Tankatmung infolge von Temperatur- und Druckdifferenzen ergibt sich eine relative Bewegung zwischen Dichtelement und den hydraulischen Verbindungen. Diese Bewegung führt häufig zu Undichtheiten. Darüberhinaus erfordern die hydraulischen sowie auch die elektrischen Verbindungen zwischen dem Topf und dem Tankflansch, in welchem der Deckel eingesetzt ist, einen relativ großen Platzbedarf. Derartige bekannte Vorrichtungen zum Abdichten eines Kraftstoff-Förderaggregates in einem Kraftstofftank mit geringer bzw. beschränkter Bauhöhe sind daher nur bedingt einsetzbar.For the hydraulic connections from the fuel delivery unit to the cover, which usually on a tank flange of a tank opening for inserting the fuel delivery unit fixed together with the pot will be floating solutions preferred, in which a seal is to be achieved by means of O-rings. by virtue of tank breathing due to temperature and pressure differences results in a relative Movement between the sealing element and the hydraulic connections. This movement often leads to leaks. In addition, the hydraulic as well as require electrical connections between the pot and the tank flange, in which the lid is used, a relatively large amount of space. Such known devices for Sealing a fuel delivery unit in a fuel tank with a low or limited overall height can therefore only be used to a limited extent.

Vorteile der ErfindungAdvantages of the invention

Gemäß der Erfindung ist das Kraftstoff-Förderaggregat, welches nach einem Einsetzen in einen Kraftstofftank gegenüber diesem abgedichtet wird, als eine kompakte Einheit in einem Gehäuse ausgebildet, welche innerhalb eines Topfes aufgenommen ist. Der Topf ist mit einer Abdeckung versehen, durch welche zumindest ein Zulaufstutzen und ein E-Anschluß der kompakten Einheit hindurchgeführt sind, wobei der Topf mit der Einheit mittels eines an einem Tankflansch befestigbaren Tankeinsatzverschlusses in den Kraftstofftank einsetzbar ist. Erfindungsgemäß ist zwischen der Abdeckung des Topfes und dem Tankflansch ein elastisches Balgelement angeordnet. Vorzugsweise ist eine das Balgelement auf die Abdeckung und gegen den Tankeinsatzverschluß drückende Feder vorgesehen, welche den Topf gegen den Tankboden drückt. Es ist auch möglich, daß der Topf am Boden des Kraftstofftanks befestigt ist. Mittels des Balgelementes wird zum einen die erforderliche Dichtigkeit gewährleistet und zum anderen eine Dehnung infolge von Tankatmung zwischen der Tankoberseite und dem Tankboden ohne Verlust der Dichtigkeit ausgeglichen.According to the invention, the fuel delivery unit, which after insertion into a fuel tank is sealed from this as one compact unit formed in a housing, which within a Pot is added. The pot is covered by a cover which at least one inlet connection and an E-connection of the compact Are passed through, the pot with the unit by means of a Tank insert closure that can be attached to a tank flange in the fuel tank can be used. According to the invention is between the cover of the pot and an elastic bellows element is arranged on the tank flange. Preferably is a the bellows element on the cover and against the tank insert closure pressing spring is provided which presses the pot against the bottom of the tank suppressed. It is also possible that the pot is at the bottom of the fuel tank is attached. By means of the bellows element, on the one hand, the required Ensures tightness and, on the other hand, expansion due to tank breathing between the top of the tank and the bottom of the tank without losing the Tightness balanced.

Mittels der einerseits gegen den Tankeinsatzverschluß und andererseits gegen die Abdeckung drückenden Feder wird gewährleistet, daß das Kraftstoff-Förderaggregat gegen den Boden des Tanks gedrückt wird. Mittels dieser flexiblen und federvorgespannten Abdichtvorrichtung ist die Höhe des Topfes und damit die Anschlußgeometrie weitestgehend von der Tankhöhe unabhängig. Damit ist es möglich, Standardlösungen zu verwenden, ohne daß spezielle Konstruktionen, beispielsweise für die Verbindung zum Flansch, entsprechend von Kundenwünschen bzw. Kundenforderungen verwendet werden müssen. Vorzugsweise ist das Balgelement am Topf und am Tankflansch befestigt.By means of on the one hand against the tank insert closure and on the other hand against the cover pressing spring ensures that the fuel delivery unit is pressed against the bottom of the tank. By means of this Flexible and spring-loaded sealing device is the height of the pot and thus the connection geometry largely independent of the tank height. This makes it possible to use standard solutions without special constructions, for example for the connection to the flange, used according to customer wishes or customer requirements Need to become. The bellows element is preferably on the pot and on the tank flange attached.

Zwischen dem eigentlichen Dichtelement und den hydraulischen Anschlüssen treten mit der erfindungsgemäßen Abdichtvorrichtung keine Relativbewegungen auf, so daß ein Ausfall im Hinblick auf eine Undichtigkeit ausgeschlossen ist. Die erfindungsgemäße Balgelementlösung stellt darüberhinaus eine kostengünstige Lösung dar, da sie unabhängig von der Tankhöhe und von der Tankgeometrie für zahlreiche Anwendungsfälle einsetzbar ist.Between the actual sealing element and the hydraulic connections no relative movements occur with the sealing device according to the invention on, so that a failure with regard to a leak is excluded is. The bellows element solution according to the invention also provides a inexpensive solution because it is independent of the tank height and the tank geometry can be used for numerous applications.

Gemäß einem Ausführungsbeispiel wird das Balgelement bei in den Kraftstofftank eingesetztem und befestigtem Tankeinsatzverschluß zwischen dem Tankflansch und einem Ringflansch am Tankeinsatzverschluß gehalten. Der Ringflansch wird dabei durch die Feder gegen die Innenseite des Deckels des Tankeinsatzverschlusses gedrückt, wobei der Ringflansch eine umlaufende Nase aufweist. Auf der dem Tankflansch zugewandten Seite des Ringflansches von dessen Nase aus ist das Balgelement abgestützt bzw. geklemmt, während auf der nach innen gerichteten Seite der Nase des Ringflansches die Feder abgestützt ist. Mit dem Balgelement wird die Dehnbarkeit infolge von Längenänderungen bei unterschiedlichen Tankhöhen bzw. infolge von Temperaturänderungen ausgeglichen, während die Feder stets dafür sorgt, daß das Kraftstoff-Förderaggregat auf den Tankboden gedrückt wird.According to one embodiment, the bellows element is in the fuel tank inserted and fastened tank insert closure between the Tank flange and an annular flange held on the tank insert closure. The The ring flange is pressed against the inside of the cover by the spring of the tank insert closure, the ring flange being a circumferential Has nose. On the side of the ring flange facing the tank flange the bellows element is supported or clamped from its nose, while on the inward side of the nose of the ring flange the spring is supported. With the bellows element, the extensibility is the result of changes in length at different tank heights or as a result of Temperature changes compensated for, while the spring always ensures that the fuel delivery unit is pressed onto the tank bottom.

Gemäß einem weiteren Ausführungsbeispiel ist das Balgelement mittels der Feder soweit dehnbar bzw. gegen die Wirkung der Federkraft auch komprimierbar, daß der Topf bei in den Kraftstofftank eingesetztem und befestigtem Tankeinsatzverschluß an der dem Tankflansch des Kraftstofftanks gegenüberliegenden Wand im wesentlichen anliegt. In der Regel ist dies der Tankboden. Es ist jedoch auch möglich, daß zwischen dem Topfboden des Kraftstoff-Förderaggregates und dem Tankboden eine weitere, gegebenenfalls auch elastische Abstützung vorhanden ist.According to a further embodiment, the bellows element is by means of the Spring stretchable or compressible against the action of spring force, that the pot when inserted and fastened in the fuel tank Tank insert closure on the tank flange of the fuel tank opposite wall essentially abuts. This is usually the case Tank bottom. However, it is also possible that between the bottom of the pot Fuel delivery unit and the tank bottom another, if necessary there is also elastic support.

Vorzugsweise besteht das Balgelement aus Gummi.The bellows element is preferably made of rubber.

Um eine zuverlässige Abdichtung zwischen der Abdeckung und dem die Abdeckung durchdringenden Zulaufstutzen zu erzielen, ist zwischen dem Zulaufstutzen und der Abstützung der Abdeckung auf dem entsprechenden Anschlußstutzen des Kraftstoff-Förderaggregates ein O-Ring vorgesehen.To ensure a reliable seal between the cover and the To achieve cover penetrating inlet connection is between the Inlet nozzle and the support of the cover on the corresponding An O-ring is provided in the connecting piece of the fuel delivery unit.

Vorzugsweise ist der Tankeinsatzverschluß am Tankflansch mittels eines Gewindes anschraubbar. Da das Balgelement einen Außenflansch aufweist, welcher zwischen dem von der Nase nach außen gerichteten Teil des Ringflansches und dem Tankflansch beim Anschrauben des Deckels des Tankeinsatzverschlusses je nach Anschraubkraft geklemmt gehalten ist, wird an dieser Stelle bei entsprechender Klemmwirkung durch Anschrauben des Tankeinsatzverschlusses die entsprechende Dichtwirkung erzielt.The tank insert closure is preferably on the tank flange by means of a Screwable thread. Since the bellows element has an outer flange, which between the part of the ring flange facing outwards from the nose and the tank flange when screwing on the cover of the tank insert cap depending on the screwing force, is held on this point with a corresponding clamping effect by screwing the Tank insert closure achieved the appropriate sealing effect.

Gemäß einem weiteren Ausführungsbeispiel ist der E-Anschluß als integrierter Stecker in der Abdeckung ausgebildet. Vorzugsweise ist der Stecker in die Abdeckung vollkommen integriert, d.h. im Falle der Ausbildung der Abdeckung aus Gummi in die Abdeckung mit einvulkanisiert. Vorzugsweise ist auch der E-Anschluß in die Abdeckung mit eingegossen, so daß das durch die Abdeckung hindurchgeführte Anschlußkabel ausreichend dicht abgedichtet ist.According to a further exemplary embodiment, the E connection is integrated Plug formed in the cover. The plug is preferably in the cover is fully integrated, i.e. in the case of training the Rubber cover vulcanized into the cover. Preferably the electrical connection is also cast into the cover, so that the connection cables passed through the cover are sufficiently tight is sealed.

Zeichnungdrawing

Weitere Vorteile, Merkmale und Anwendungsmöglichkeiten der Erfindung werden nun anhand eines Ausführungsbeispiels unter Bezugnahme auf die beigefügte Figur detailliert erläutert.Further advantages, features and possible uses of the invention are now based on an embodiment with reference to the attached figure explained in detail.

Die Figur zeigt die erfindungsgemäße Vorrichtung zum Abdichten eines in einen Kraftstofftank eingesetzten Kraftstoff-Förderaggregates.The figure shows the device according to the invention for sealing an in a fuel tank used fuel delivery unit.

Ausführungsbeispielembodiment

Das Kraftstoff-Förderaggregat 2 ist in einem Kraftstoff-Tank 1 eingesetzt, wobei das eigentliche Kraftstoff-Förderaggregat 2 ein Gehäuse 3 aufweist und von einem Topf 4 umgeben ist. Das Kraftstoff-Förderaggregat weist hydraulische Anschlüsse zum Zuführen von ungereinigtem und zum Abführen von gereinigtem Kraftstoff sowie einen elektrischen Anschluß zum Versorgen des Elektromotors des Kraftstoff-Förderaggregates 2 mit Antriebsenergie zum Antreiben der Kraftstoff-Förderpumpe des Kraftstoff-Förderaggregates 2 auf. Der Topf 4 ist mit einer Abdeckung 5 versehen, welche u.a. aus Gründen der Platzersparnis im wesentlichen konform mit den hydraulischen Anschlüssen des Kraftstoff-Förderaggregates 2 ausgebildet ist.The fuel delivery unit 2 is used in a fuel tank 1, the actual fuel delivery unit 2 having a housing 3 and is surrounded by a pot 4. The fuel delivery unit points hydraulic connections for feeding uncleaned and for draining of cleaned fuel and an electrical connection for supply of the electric motor of the fuel delivery unit 2 with drive energy for Driving the fuel delivery pump of the fuel delivery unit 2. The pot 4 is provided with a cover 5, which i.a. for reasons the space saving essentially complies with the hydraulic connections of the fuel delivery unit 2 is formed.

Die Abdeckung 5 weist an ihrer auf die Oberkanten des Topfes gerichteten Außenseite eine winkelförmige Ausnehmung auf, so daß ein im wesentlichen radial verlaufender Flanschabschnitt und ein im wesentlichen axial verlaufender Flanschabschnitt an der Abdeckung ausgebildet sind. Die Begriffe "radial" und "axial" beziehen sich dabei auf die Drehachse des Elektromotors des Kraftstoff-Förderaggregates. Durch die beiden Flanschabschnitte wird die Abdeckung 5 satt auf der Stirnfläche des Topfes und einem oberen Bereich von dessen Innenfläche anliegend aufgesetzt.The cover 5 has on it directed towards the upper edges of the pot Outside an angular recess so that a substantially radially extending flange section and a substantially axially extending Flange section are formed on the cover. The terms "Radial" and "axial" refer to the axis of rotation of the electric motor of the fuel delivery unit. Through the two flange sections the cover 5 full on the end face of the pot and an upper one Area of its inner surface placed on.

Die Abdeckung weist zumindest zwei Durchführungen auf: eine Durchführung für einen Zulaufstutzen 6 und eine Durchführung für einen E-Anschluß 7. Der E-Anschluß 7 wird dabei durch ein die Abdeckung 5 durchdringendes Kabel bzw. durch mehrere Kabel gebildet, wobei die Kabel in die Abdeckung so integriert sind, daß eine zuverlässige Dichtigkeit gewährleistet ist. Im Bereich des Zulaufstutzens 6 ist die Abdeckung 5 so ausgebildet, daß sie im wesentlichen über die gesamte Länge des Zulaufstutzens 6 diesen umhüllend angeordnet ist. Im Bereich des Anschlußendes des Zulaufstutzens 6 am Kraftstoff-Förderaggregat 2 ist aus Gründen einer zuverlässigen Dichtigkeit zwischen der Abdeckung 5 und dem Außenumfang des unteren Endes des Zulaufstutzens 6 ein O-Ring 14 vorgesehen. Um die Öffnung des Kraftstofftanks 1, durch welche das Kraftstoff-Förderaggregat 2 mit Topf 4 und Abdeckung 5 eingesetzt wird, ist ein Tankflansch 8 vorgesehen, welcher ein Außengewinde aufweist.The cover has at least two bushings: a bushing for an inlet connection 6 and a bushing for an E connection 7. The E-connector 7 is through a cover 5 penetrating Cable or formed by several cables, the cables in the Cover are integrated so that reliable tightness is guaranteed is. In the area of the inlet connection 6, the cover 5 is designed such that they are essentially over the entire length of the inlet connection 6 this is arranged enveloping. In the area of the connection end of the inlet connection 6 on the fuel delivery unit 2 is reliable for reasons of Tightness between the cover 5 and the outer circumference of the an O-ring 14 is provided at the lower end of the inlet connector 6. To the Opening of the fuel tank 1 through which the fuel delivery unit 2 with pot 4 and cover 5 is used, a tank flange 8 is provided, which has an external thread.

Ein Tankeinsatzverschluß 9, welcher deckelförmig mit einem in Richtung auf den Tankflansch 8 abgewinkelten Endbereich ausgebildet ist, besitzt an dessen Innenseite ein Innengewinde, welches mit dem Außengewinde des Tankflansches 8 in Eingriff bringbar ist. An der inneren Oberfläche im Bereich der Abwinkelung des Tankeinsatzverschlusses 9 ist ein Ringflansch 12 vorgesehen, welcher durch eine in eine im wesentlichen in axialer Richtung des Kraftstoff-Förderaggregates 2 weisende Nase in zwei Bereiche geteilt ist. Der der Abwinkelung des Tankeinsatzverschlusses 9 zugewandte Teilbereich des Ringflansches 12 klemmt im mit dem Tankflansch 8 verschraubten Zustand einen nach außen weisenden Flanschabschnitt eines Balgelementes 10, welches an seiner, in axialer Richtung gesehen, dazu gegenüberliegenden Seite einen radial nach innen gerichteten Flansch aufweist. Dieser nach innen gerichtete Flansch ist so ausgebildet, daß er auf der Außenseite des radialen Flanschabschnittes der Abdeckung 5 satt aufliegt.A tank insert closure 9, which is lid-shaped with one in the direction of the tank flange 8 is formed angled end area, has the inside of which is an internal thread, which is connected to the external thread of the Tank flange 8 can be brought into engagement. On the inner surface in the The area of the bend of the tank insert closure 9 is an annular flange 12 provided, which by an essentially in an axial Direction of the fuel delivery unit 2 nose in two areas is divided. The one facing the bend of the tank insert closure 9 Part of the ring flange 12 clamps in the screwed to the tank flange 8 State an outward-facing flange portion of a Bellows element 10, which is seen on it in the axial direction opposite side has a radially inward flange. This inward flange is designed to open the outside of the radial flange portion of the cover 5 fits snugly.

Auf dem durch die Nase abgetrennten und radial einwärts liegenden Bereich des Ringflansches 12 ist eine Feder 11 abgestützt, deren gegenüberliegendes Ende auf den radial nach innen gerichteten Flanschabschnitt des Balgelementes 10 drückt, so daß das Balgelement 10 auf die Abdeckung 5 und diese wiederum auf den oberen Stirnbereich des Topfes 4 dichtend gedrückt wird. Damit wird einerseits eine hohe Flexibilität dieser erfindungsgemäßen Vorrichtung zum Abdichten des Kraftstoff-Förderaggregates 2 in einem Kraftstofftank 1 gewährleistet, zum anderen können damit Höhendifferenzen unterschiedlicher Kraftstofftanks ausgeglichen werden. Des weiteren sind Höhenänderungen infolge von Tankatmung ebenfalls ausgleichbar, ohne daß die Dichtwirkung nachläßt. On the area separated by the nose and lying radially inwards of the ring flange 12 is supported a spring 11, the opposite End on the radially inward flange section of the bellows element 10 presses so that the bellows member 10 on the cover 5 and this in turn is pressed sealingly onto the upper end region of the pot 4. This is on the one hand a high flexibility of this device according to the invention for sealing the fuel delivery unit 2 in a fuel tank 1 guaranteed, on the other hand, height differences can be different Fuel tanks are balanced. Furthermore there are changes in height due to tank breathing also compensable without the Sealing effect wears off.

Durch die Wirkung der Kraft der Feder 11 wird ständig eine ausreichende Dichtwirkung zwischen dem radial nach innen gerichteten Ende des Balgelementes 10 und der Abdeckung 5 gewährleistet. Andererseits erfolgt eine Abdichtung zwischen dem Tankflansch 8 und dem Ringflansch 12, welche im aufgeschraubten Zustand des Tankeinsatzverschlusses 9 den radial nach außen gerichteten Flansch des Balgelementes 10 zwischen sich klemmen.Due to the action of the force of the spring 11 is always sufficient Sealing effect between the radially inward end of the bellows element 10 and the cover 5 guaranteed. On the other hand, there is a Sealing between the tank flange 8 and the ring flange 12, which in the screwed-on state of the tank insert closure 9 radially after clamp the flange of the bellows element 10 between them.

Die Feder 11 bewirkt darüberhinaus, daß das Kraftstoff-Förderaggregat 2 auf die Tankwand 13 gedrückt wird, welche der den Tankflansch 8 tragenden Wand des Kraftstofftanks 1 gegenüberliegt.The spring 11 also causes the fuel delivery unit 2 to the tank wall 13 is pressed, which of those carrying the tank flange 8 Wall of the fuel tank 1 is opposite.

Eine elastische Lagerung zwischen dem Kraftstoff-Förderaggregat 2 und dem Topf 4 wird durch das Vorsehen einer Abstützung 15 gewährleistet. Diese Abstützung 15 zwischen der äußeren Oberfläche des Gehäuses 3 des Kraftstoff-Förderaggregates 2 und der inneren Oberfläche des Topfes 4 ist elastisch ausgebildet, um Schwingungen zu dämpfen, welche gegebenenfalls durch den Elektromotor des Kraftstoff-Förderaggregates 2 erzeugt werden.An elastic mounting between the fuel delivery unit 2 and the pot 4 is ensured by the provision of a support 15. This support 15 between the outer surface of the housing 3 of the Fuel -Förderaggregates f 2 and the inner surface of the pot 4 is resilient to dampen vibrations which are generated optionally by the electric motor of the fuel delivery unit. 2

Die elektrischen Anschlußleitungen vom Elektromotor des Kraftstoff-Förderaggregates 2 sind von dessen unmittelbarem Anschluß zu einem in die Abdeckung 5 integrierten, vorzugsweise eingespritzten Flachstecker geführt. An diesem Flachstecker sind dann die entsprechenden Anschlußstecker anschließbar.The electrical connection lines from the electric motor of the fuel delivery unit 2 are from its direct connection to one in the Cover 5 integrated, preferably injected tab connector. The corresponding connectors are then on this flat connector connected.

Die erfindungsgemäße Vorrichtung zum Abdichten eines in einem Kraftstofftank 1 einsetzbaren Kraftstoff-Förderaggregates 2 liefert somit neben einer gleichmäßigen Dichtwirkung bei unterschiedlichen Tankhöhen selbst unter Berücksichtigung der Tankatmung infolge von Temperatur- und/oder Druckunterschieden eine zuverlässige und ausreichende Dichtwirkung. The device according to the invention for sealing a in a fuel tank 1 usable fuel delivery unit 2 thus delivers in addition a uniform sealing effect at different tank heights themselves taking into account tank breathing due to temperature and / or Pressure differences a reliable and sufficient sealing effect.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
KraftstofftankFuel tank
22
Kraftstoff-FörderaggregatFuel delivery unit
33
Gehäusecasing
44
Topfpot
55
Abdeckungcover
66
Zulaufstutzeninlet connection
77
E-AnschlußE terminal
88th
Tankflanschtank flange
99
TankeinsatzverschlußTank insert closure
1010
Balgelementbellows
1111
Federfeather
1212
Ringflanschannular flange
1313
Tankwandtank wall
1414
O-RingO-ring
1515
Abstützungsupport

Claims (10)

  1. Fuel tank (1) having a fuel feed assembly (2) which is accommodated in a housing (3) within a cup (4) and is intended for feeding a fuel flow out of the fuel tank (1), which is accommodated as a compact unit in a housing (3) within a cup (4) which has a cover (5) through which at least one inlet nozzle (6) and an E-connection (7) of the unit are guided, it being possible for the cup (4) with the unit to be inserted into the fuel tank (1) by means of a tank insert closure (9) which can be fastened on a tank flange (8), characterized in that an elastic bellows element (10) which compensates for differences in height is arranged between the cover (5) of the cup (4) and the tank flange (8) and is prestressed via a spring (11) which presses the bellows element (10) onto the cover (5) and against the tank insert closure (9).
  2. Device according to Claim 1, characterized in that the cup (4) is fastened on the bottom of the fuel tank (1).
  3. Device according to Claim 1, characterized in that the bellows element (10) can be expanded by means of the spring (11) and compressed against the action of the spring force to such an extent that the cup (4) with the tank insert closure (9) inserted and fastened into the fuel tank (1) essentially bears on the tank wall (13) lying opposite the tank flange (8) of the fuel tank (1).
  4. Device according to one of Claims 1 to 3, characterized in that the bellows element (10) is fastened on the cup (4) and on the tank flange (8).
  5. Device according to one of Claims 1 to 4, characterized in that the bellows element (10) with the tank insert closure (9) inserted and fastened into the fuel tank (1) is held between the tank flange (8) and an annular flange (12) on the tank insert closure (9).
  6. Device according to one of Claims 1 to 5, characterized in that the bellows element (10) consists of rubber.
  7. Device according to one of Claims 1 to 6, characterized in that an O-ring (14) is provided between the inlet nozzle (6) and the cover (5).
  8. Device according to one of Claims 1 to 7, characterized in that the tank insert closure (9) can be screwed on the tank flange (8) by means of a thread.
  9. Device according to one of Claims 1 to 8, characterized in that the E-connection (7) is designed as a plug which is integrated in the cover (5).
  10. Device according to one of Claims 1 to 8, characterized in that the E-connection (7) takes place via cables which are cast into the cover (5) and led through it.
EP98121686A 1997-12-03 1998-11-13 Device for sealing a fuel pumping device in a fuel tank Expired - Lifetime EP0921299B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19753674 1997-12-03
DE19753674A DE19753674A1 (en) 1997-12-03 1997-12-03 Device for sealing a fuel delivery unit in a fuel tank

Publications (3)

Publication Number Publication Date
EP0921299A2 EP0921299A2 (en) 1999-06-09
EP0921299A3 EP0921299A3 (en) 2000-03-15
EP0921299B1 true EP0921299B1 (en) 2004-09-08

Family

ID=7850639

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98121686A Expired - Lifetime EP0921299B1 (en) 1997-12-03 1998-11-13 Device for sealing a fuel pumping device in a fuel tank

Country Status (2)

Country Link
EP (1) EP0921299B1 (en)
DE (2) DE19753674A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2356180B (en) * 1999-11-12 2003-03-19 Dana Corp In-tank fuel delivery system
DE10129436A1 (en) 2001-06-19 2003-01-02 Bosch Gmbh Robert Fuel supply device for a motor vehicle
DE10330452A1 (en) * 2003-07-05 2005-02-24 Daimlerchrysler Ag Holding device for fixing a fuel pump in a swirl pot
JP4329037B2 (en) * 2004-12-28 2009-09-09 株式会社デンソー Fuel supply device
DE102007045178A1 (en) * 2007-09-21 2009-04-02 Robert Bosch Gmbh Fuel delivery module

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE44854C (en) H. DE JONG in Amsterdam, Spiegelplein Nr. 229 Apparatus for imitating wood fibers
US2963203A (en) * 1958-11-21 1960-12-06 Tokheim Corp Fuel pump mounting
DE1947505A1 (en) * 1969-09-19 1971-06-16 Bosch Gmbh Robert Suspension device for an electric fuel pump
US4590964A (en) * 1985-04-26 1986-05-27 General Motors Corporation Noise isolation for a fuel system
US4672937A (en) * 1986-05-19 1987-06-16 General Motors Corporation Fuel pump system
DE8705726U1 (en) * 1987-04-18 1987-06-25 Pierburg GmbH, 4040 Neuss Fuel delivery device for an internal combustion engine
FR2681293B1 (en) * 1991-09-12 1993-12-17 Plastic Omnium Cie DEVICE FOR EXTRACTING FUEL FROM THE BOTTOM OF A DEFORMABLE TANK.
DE19615081A1 (en) * 1996-04-17 1997-10-23 Bosch Gmbh Robert IC engine fuel supply device including fuel tank containing pump module

Also Published As

Publication number Publication date
DE59811922D1 (en) 2004-10-14
EP0921299A2 (en) 1999-06-09
EP0921299A3 (en) 2000-03-15
DE19753674A1 (en) 1999-06-10

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