EP2060773A2 - Fuel delivery unit - Google Patents

Fuel delivery unit Download PDF

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Publication number
EP2060773A2
EP2060773A2 EP08105505A EP08105505A EP2060773A2 EP 2060773 A2 EP2060773 A2 EP 2060773A2 EP 08105505 A EP08105505 A EP 08105505A EP 08105505 A EP08105505 A EP 08105505A EP 2060773 A2 EP2060773 A2 EP 2060773A2
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EP
European Patent Office
Prior art keywords
electrically conductive
fuel
delivery unit
components
fuel delivery
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.)
Ceased
Application number
EP08105505A
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German (de)
French (fr)
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EP2060773A3 (en
Inventor
Bernd Rumpf
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Continental Automotive GmbH
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Continental Automotive GmbH
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Publication date
Application filed by Continental Automotive GmbH filed Critical Continental Automotive GmbH
Publication of EP2060773A2 publication Critical patent/EP2060773A2/en
Publication of EP2060773A3 publication Critical patent/EP2060773A3/en
Ceased legal-status Critical Current

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    • 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
    • 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
    • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
    • F02M37/44—Filters structurally associated with pumps
    • 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
    • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
    • F02M37/46—Filters structurally associated with pressure regulators
    • 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
    • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
    • F02M37/50—Filters arranged in or on fuel tanks

Definitions

  • the invention relates to a fuel delivery unit for conveying fuel from a fuel tank to an internal combustion engine of a motor vehicle, comprising a plurality of components, the components having a flange for closing an opening of the fuel tank, a swirl pot connected to the flange via support elements, a fuel pump arranged therein, a fuel filter, a pressure regulator, a level sensor and a pump pre-filter, and means for connecting each individual component to a ground potential of the motor vehicle.
  • electrostatic charges When lying in fuel, fuel flowed around or flowed through components electrostatic charges can form.
  • the formation of the electrostatic charges depend on the electrical conductivity of the fuel used, the external conditions, eg. B. Humidity, and the flow rate of the fuel to or through the corresponding component.
  • the electrostatic charge Depending on the type and size of the electrostatic charge and the conditions inside the fuel tank, z.
  • oxygen content there is a corresponding risk that degrade electrostatic charges by means of a sparkover.
  • Such a flashover can in the worst case lead to ignition of the fuel mixture.
  • one possibility for dissipating electrostatic charges is to connect the corresponding component directly to the ground potential of the motor vehicle via an electrical line. Due to the additional expense of material, installation and installation of the electrical line, this form of dissipation of electrostatic charges is particularly costly.
  • a pressure regulator can be formed electrically conductive with the metallic housing of a fuel pump for dissipating electrostatic charges.
  • the electrically conductive connection may be an electrical line or a conductive material, e.g. As metal or electrically conductive plastic, be.
  • the invention is therefore an object of the invention to provide a fuel delivery unit, which is reliably protected against electrostatic charges, the effort to dissipate electrostatic charges should be kept as low as possible.
  • the object is achieved in that flows through or flowed through by fuel components over at least two electrically conductive connections are connected to the ground potential.
  • the provision of at least two electrically conductive connections to a ground potential ensures that electrostatic charges of components through which the fuel flows or is flushed are still reliably discharged even when one of the electrically conductive connections is interrupted.
  • the construction of dangerous total capacities is avoided.
  • the device according to the invention thereby has a much higher security.
  • a particularly good dissipation of electrostatic charges is achieved with an electrically conductive connection in the form of an electrical line or by means of the metal-to-metal connection.
  • the advantage of the electrically conductive connection in the form of an electrical line, preferably a cable, is that the electrical line can be connected by means of a frictional or material connection. By this type of connection, the risk of the formation of contact resistance, which may worsen the dissipation of the charges excluded.
  • At least one of the electrically conductive connections is made from an electrically conductive plastic to a metal. This has the advantage that electrically conductive connections are also made possible between components made of different materials.
  • the dissipation of electrostatic charges by at least one electrically conductive connection of an electrically conductive plastic to an electrically conductive plastic has the advantage that by the use of the plastic improved corrosion resistance in Fuel and a lower weight associated with improved processability can be achieved.
  • the number of electrically conductive connections can be reduced in a fuel delivery unit according to a further advantageous embodiment, characterized in that in at least one of the electrically conductive connections of a component with the ground potential, a further component is interposed.
  • POM polyoxymethylene
  • PA polyamide
  • the fuel delivery unit 1 in FIG. 1 is shown partially cut to better illustrate the components.
  • the fuel delivery unit 1 consists of a flange 2, which is designed such that it closes an opening of a fuel tank, not shown, into which the fuel delivery unit 1 is inserted.
  • the flange 2 accommodates a fine filter 3 designed as a fuel filter, which consists of an upper housing part 4 and a lower housing part 5.
  • the two housing parts 4, 5 enclose the filter element 6.
  • the lower housing part 5 has a first nozzle 7 and a second nozzle 8, in which a pressure regulator 9 is inserted.
  • the support elements 11 each consist of a tube 12 around which a coil spring 13 is arranged. With the flange 2 regions facing away from the tubes 12, these are connected via guides with a swirl pot 14. The coil springs 13 are supported on the flange 2 and on the guides of the swirl pot 14, so that the swirl pot 14 is biased against the bottom of the fuel tank.
  • a level sensor 15 is attached to determine the amount of fuel in the fuel tank.
  • a pump holder 16 is fixed with a fuel pump 17 held therein.
  • the fuel pump 17 has an outlet nozzle 18, which is connected via a feed line, not shown, with a nozzle 8 of the housing lower part 5.
  • the fuel pump 17 is connected to a pump pre-filter 19 and a suction jet pump 20.
  • the suction jet pump 20 has a seal 21, which encloses the inlet opening, not shown, in the bottom 22 of the swirl pot 14 and at the same time decouples the suction jet pump 20 from the swirl pot 14.
  • the suction jet pump 20 sucks fuel from the fuel tank and delivers it to the surge pot 14.
  • the suction jet pump 20 is driven by the fuel pump 17 by supplying a subset of the fuel pumped by the fuel pump 17 as a propulsion jet to the suction jet pump 20.
  • the fuel pump 17 sucks fuel from the swirl pot 14 and delivers it via the outlet port 18 and the feed line to the fine filter 3.
  • the filtered fuel is conveyed via a flow pipe 23 on to the internal combustion engine, not shown. From the fuel pump 17 too much subsidized fuel is returned via the pressure regulator 9 in the swirl pot 14.
  • FIG. 2 shows the individual components of the fuel delivery unit 1 in an exploded view.
  • the lines between the individual components indicate the individual electrically conductive connections, the line representation indicating the type of electrically conductive connection.
  • Each component has at least two electrically conductive connections.
  • the ground potential is applied to the plug 24 shown schematically.
  • Both the level sensor and the fuel pump 17 are connected via their illustrated as solid lines electrical lines 25 to the plug 24 on the flange 2 to the ground potential.
  • the existing metal pressure regulator 9 is also connected to an electrical line 25 to the ground potential.
  • the metal components tube 12 and coil spring 13 have an electrically conductive connection of metal to metal, which is shown as a dotted line 26.
  • Heater 28 are made of POM with admixtures of carbon in the form of soot.
  • Electrically conductive connections between components of electrically conductive plastic are shown by dashed lines 29.
  • the electrically conductive connections between components of electrically conductive plastic and components made of metal are shown with dash-dot lines 30.

Abstract

The fuel supply unit has multiple components that are flanges for closing an opening of a fuel tank. The components through which fuel flows are connected with an earth potential (24) by two electrically conducting connections (25,25a,26,29,30). An electrically conductive plastic is a polyoxymethylene or a polyamide with addition of electrically conductive components, particularly metal or carbon.

Description

Gegenstand der Erfindung ist eine Kraftstofffördereinheit zum Fördern von Kraftstoff aus einem Kraftstoffbehälter zu einer Brennkraftmaschine eines Kraftfahrzeugs, bestehend aus mehreren Komponenten, wobei die Komponenten ein Flansch zum Verschließen einer Öffnung des Kraftstoffbehälters, ein mit dem Flansch über Abstützelemente verbundener Schwalltopf, eine darin angeordnete Kraftstoffpumpe, ein Kraftstofffilter, ein Druckregler, ein Füllstandgeber und ein Pumpenvorfilter sind, und Mitteln zum Verbinden jeder einzelnen Komponente mit einem Massepotential des Kraftfahrzeugs.The invention relates to a fuel delivery unit for conveying fuel from a fuel tank to an internal combustion engine of a motor vehicle, comprising a plurality of components, the components having a flange for closing an opening of the fuel tank, a swirl pot connected to the flange via support elements, a fuel pump arranged therein, a fuel filter, a pressure regulator, a level sensor and a pump pre-filter, and means for connecting each individual component to a ground potential of the motor vehicle.

Bei in Kraftstoff liegenden, von Kraftstoff umströmten oder durchströmten Komponenten können sich elektrostatische Aufladungen bilden. Die Bildung der elektrostatischen Aufladungen hängen vom elektrischen Leitwert des verwendeten Kraftstoffs, den Außenbedingungen, z. B. Luftfeuchte, und der Fließgeschwindigkeit des Kraftstoffs um oder durch die entsprechende Komponente ab. In Abhängigkeit von der Art und Größe der elektrostatischen Aufladung und den Verhältnissen im Inneren des Kraftstoffbehälters, z. B. Sauerstoffgehalt, besteht ein dementsprechendes Risiko, dass sich elektrostatische Aufladungen mittels eines Funkenüberschlages abbauen. Ein derartiger Funkenüberschlag kann im schlimmsten Fall zu einer Zündung des Kraftstoffgemischs führen. Um Funkenüberschläge zu vermeiden, wird versucht elektrostatische Aufladungen bereits vor dem Erreichen der Überschlagsspannung abzubauen.When lying in fuel, fuel flowed around or flowed through components electrostatic charges can form. The formation of the electrostatic charges depend on the electrical conductivity of the fuel used, the external conditions, eg. B. Humidity, and the flow rate of the fuel to or through the corresponding component. Depending on the type and size of the electrostatic charge and the conditions inside the fuel tank, z. As oxygen content, there is a corresponding risk that degrade electrostatic charges by means of a sparkover. Such a flashover can in the worst case lead to ignition of the fuel mixture. In order to avoid flashovers, it is attempted to reduce electrostatic charges already before reaching the flashover voltage.

Dazu ist es bekannt, die entsprechende Komponente mit dem Massepotential des Kraftfahrzeugs elektrisch leitend zu verbinden. Dies wird insbesondere dadurch erreicht, dass die Komponente direkt mit dem Massepotential verbunden wird. So werden bei einer Kraftstoffpumpe ihre elektrischen Anschlussleitungen zur Ableitung elektrostatischer Aufladungen benutzt.For this purpose, it is known to electrically connect the corresponding component to the ground potential of the motor vehicle. This is achieved in particular by the component being connected directly to the ground potential. So with a fuel pump their electrical connection cables used to dissipate electrostatic charges.

Bei Komponenten ohne eigene elektrische Anschlussleitungen besteht eine Möglichkeit zur Ableitung elektrostatischer Aufladungen darin, die entsprechende Komponente direkt über eine elektrische Leitung mit dem Massepotential des Kraftfahrzeugs zu verbinden. Infolge des zusätzlichen Aufwands für Material, Montage und Verlegung der elektrischen Leitung ist diese Form der Ableitung elektrostatischer Aufladungen besonders kostenintensiv.In the case of components without separate electrical connection lines, one possibility for dissipating electrostatic charges is to connect the corresponding component directly to the ground potential of the motor vehicle via an electrical line. Due to the additional expense of material, installation and installation of the electrical line, this form of dissipation of electrostatic charges is particularly costly.

Eine weitere Möglichkeit besteht darin, die Komponente elektrisch leitend mit einer anderen Komponente, welche Mittel zum Ableitung elektrostatischer Aufladungen besitzt, zu verbinden. So lässt sich ein Druckregler elektrisch leitend mit dem metallischen Gehäuse einer Kraftstoffpumpe zum Ableitung elektrostatischer Aufladungen ausbilden. Die elektrisch leitende Verbindung kann eine elektrische Leitung oder ein leitfähiges Material, z. B. Metall oder elektrisch leitfähiger Kunststoff, sein. Ein entscheidender Nachteil dieser Reihenschaltung von elektrisch leitend miteinander verbundenen Komponenten besteht darin, dass bei einer Unterbrechung der elektrischen Verbindung zum Massepotential das Risiko eines Funkenüberschlages stark ansteigt. Das stark gestiegene Risiko ist darin begründet, dass sich aufgrund der Unterbrechung die Einzelkapazitäten der abgetrennten Komponenten zu einer Gesamtkapazität summieren.Another possibility is to electrically connect the component with another component which has means for discharging electrostatic charges. Thus, a pressure regulator can be formed electrically conductive with the metallic housing of a fuel pump for dissipating electrostatic charges. The electrically conductive connection may be an electrical line or a conductive material, e.g. As metal or electrically conductive plastic, be. A decisive disadvantage of this series connection of electrically interconnected components is that when the electrical connection to the ground potential is interrupted, the risk of a flashover is greatly increased. The strong increase in risk is due to the fact that due to the interruption, the individual capacities of the separated components add up to a total capacity.

Der Erfindung liegt daher die Aufgabe zugrunde eine Kraftstofffördereinheit zu schaffen, die zuverlässig gegen elektrostatische Aufladungen geschützt ist, wobei der Aufwand zur Ableitung elektrostatischer Aufladungen so gering wie möglich gehalten werden soll.The invention is therefore an object of the invention to provide a fuel delivery unit, which is reliably protected against electrostatic charges, the effort to dissipate electrostatic charges should be kept as low as possible.

Erfindungsgemäß wird die Aufgabe dadurch gelöst, dass vom Kraftstoff durchströmte oder umspülte Komponenten über mindestens zwei elektrisch leitende Verbindungen mit dem Massepotential verbunden sind.According to the invention the object is achieved in that flows through or flowed through by fuel components over at least two electrically conductive connections are connected to the ground potential.

Mit dem Vorsehen von mindestens zwei elektrisch leitenden Verbindungen zu einem Massepotential ist gewährleistet, dass elektrostatische Aufladungen von Komponenten, die vom Kraftstoff durchströmt oder umspült werden, auch dann noch zuverlässig abgeleitet werden, wenn eine der elektrisch leitenden Verbindungen unterbrochen ist. Der Aufbau von gefährlichen Summenkapazitäten wird vermieden. Die erfindungsgemäße Vorrichtung besitzt dadurch eine wesentlich höhere Sicherheit.The provision of at least two electrically conductive connections to a ground potential ensures that electrostatic charges of components through which the fuel flows or is flushed are still reliably discharged even when one of the electrically conductive connections is interrupted. The construction of dangerous total capacities is avoided. The device according to the invention thereby has a much higher security.

Eine besonders gute Ableitung elektrostatischer Aufladungen wird mit einer elektrisch leitenden Verbindung in Form einer elektrischen Leitung oder mittels der Verbindung von Metall zu Metall erreicht. Der Vorteil der elektrisch leitenden Verbindung in Form einer elektrischen Leitung, vorzugsweise einem Kabel, besteht darin, dass sich die elektrische Leitung mittels einer kraft- oder stoffschlüssigen Verbindung anschließen lässt. Durch diese Art der Verbindung ist die Gefahr der Bildung von Übergangswiderständen, welche die Ableitung der Aufladungen verschlechtern können, ausgeschlossen.A particularly good dissipation of electrostatic charges is achieved with an electrically conductive connection in the form of an electrical line or by means of the metal-to-metal connection. The advantage of the electrically conductive connection in the form of an electrical line, preferably a cable, is that the electrical line can be connected by means of a frictional or material connection. By this type of connection, the risk of the formation of contact resistance, which may worsen the dissipation of the charges excluded.

In einer weiteren vorteilhaften Ausgestaltung erfolgt mindestens eine der elektrisch leitenden Verbindungen von einem elektrisch leitfähigen Kunststoff zu einem Metall. Das hat den Vorteil, dass elektrisch leitende Verbindungen auch zwischen Komponenten aus unterschiedlichen Werkstoffen ermöglicht werden.In a further advantageous embodiment, at least one of the electrically conductive connections is made from an electrically conductive plastic to a metal. This has the advantage that electrically conductive connections are also made possible between components made of different materials.

In einer anderen Ausgestaltung erfolgt die Ableitung elektrostatischer Aufladungen durch mindestens eine elektrisch leitende Verbindung von einem elektrisch leitfähigen Kunststoff zu einem elektrisch leitfähigen Kunststoff. Eine derartige Verbindung hat den Vorteil, dass durch die Verwendung des Kunststoffs eine verbesserte Korrosionsbeständigkeit im Kraftstoff und ein geringeres Gewicht verbunden mit einer verbesserten Verarbeitbarkeit erreicht werden.In another embodiment, the dissipation of electrostatic charges by at least one electrically conductive connection of an electrically conductive plastic to an electrically conductive plastic. Such a compound has the advantage that by the use of the plastic improved corrosion resistance in Fuel and a lower weight associated with improved processability can be achieved.

Die Anzahl elektrisch leitender Verbindungen lässt sich bei einer Kraftstofffördereinheit gemäß einer weiteren vorteilhaften Ausgestaltung dadurch verringern, indem in mindestens einer der elektrisch leitenden Verbindungen einer Komponente mit dem Massepotential eine weitere Komponente zwischengeschaltet ist.The number of electrically conductive connections can be reduced in a fuel delivery unit according to a further advantageous embodiment, characterized in that in at least one of the electrically conductive connections of a component with the ground potential, a further component is interposed.

Als elektrisch leitfähiger Kunststoff hat sich ein Kunststoff auf der Basis von Polyoxymethylen (POM) oder Polyamid (PA) mit Beimischungen von elektrisch leitfähigen Bestandteilen, insbesondere Metall oder Kohlenstoff, als vorteilhaft erwiesen. Sowohl POM als auch PA zeichnen sich darüber hinaus durch eine sehr gute Beständigkeit gegenüber Kraftstoffen aus.As an electrically conductive plastic, a plastic based on polyoxymethylene (POM) or polyamide (PA) with admixtures of electrically conductive components, in particular metal or carbon, has proved to be advantageous. Both POM and PA are also characterized by very good resistance to fuels.

An einem Ausführungsbeispiel wird die Erfindung nachfolgend beschrieben. Dabei zeigen:

  • Figur 1: eine erfindungsgemäße Kraftstofffördereinheit und
  • Figur 2: ein Prinzipschaltbild der Kraftstofffördereinheit aus Figur 1.
In one embodiment, the invention will be described below. Showing:
  • FIG. 1 a fuel delivery unit according to the invention and
  • FIG. 2 : a schematic diagram of the fuel delivery from FIG. 1 ,

Die Kraftstofffördereinheit 1 in Figur 1 ist zur besseren Darstellung der Komponenten teilweise geschnitten dargestellt. Die Kraftstofffördereinheit 1 besteht aus einem Flansch 2, welcher derart ausgebildet ist, dass er eine Öffnung eines nicht dargestellten Kraftstoffbehälters, in den die Kraftstofffördereinheit 1 eingesetzt ist, verschließt. Der Flansch 2 nimmt einen als Kraftstofffilter ausgebildeten Feinfilter 3 auf, der aus einem Gehäuseoberteil 4 und einem Gehäuseunterteil 5 besteht. Die beiden Gehäuseteile 4, 5 umschließen das Filterelement 6. Das Gehäuseunterteil 5 besitzt einen ersten Stutzen 7 und einen zweiten Stutzen 8, in den ein Druckregler 9 eingesetzt ist.The fuel delivery unit 1 in FIG. 1 is shown partially cut to better illustrate the components. The fuel delivery unit 1 consists of a flange 2, which is designed such that it closes an opening of a fuel tank, not shown, into which the fuel delivery unit 1 is inserted. The flange 2 accommodates a fine filter 3 designed as a fuel filter, which consists of an upper housing part 4 and a lower housing part 5. The two housing parts 4, 5 enclose the filter element 6. The lower housing part 5 has a first nozzle 7 and a second nozzle 8, in which a pressure regulator 9 is inserted.

Am Gehäuseunterteil 5 sind weiter Aufnahmen 10 angeordnet, in denen Abstützelemente 11 eingesetzt sein. Die Abstützelemente 11 bestehen aus je einem Rohr 12 um das eine Spiralfeder 13 angeordnet ist. Mit den dem Flansch 2 abgewandten Bereichen der Rohre 12 sind diese über Führungen mit einem Schwalltopf 14 verbunden. Die Spiralfedern 13 stützen sich am Flansch 2 und an den Führungen des Schwalltopfes 14 ab, so dass der Schwalltopf 14 gegen den Boden des Kraftstoffbehälters vorgespannt ist.On the lower housing part 5 further receptacles 10 are arranged, in which support elements 11 may be used. The support elements 11 each consist of a tube 12 around which a coil spring 13 is arranged. With the flange 2 regions facing away from the tubes 12, these are connected via guides with a swirl pot 14. The coil springs 13 are supported on the flange 2 and on the guides of the swirl pot 14, so that the swirl pot 14 is biased against the bottom of the fuel tank.

Am Schwalltopf 14 ist ein Füllstandsgeber 15 zur Ermittlung der Kraftstoffmenge im Kraftstoffbehälter befestigt. Im Schwalltopf 14 ist ein Pumpenhalter 16 mit einer darin gehaltenen Kraftstoffpumpe 17 befestigt. Die Kraftstoffpumpe 17 besitzt einen Auslassstutzen 18, der über eine nicht dargestellte Vorlaufleitung mit einem Stutzen 8 des Gehäuseunterteils 5 verbunden ist. Die Kraftstoffpumpe 17 ist mit einem Pumpenvorfilter 19 und einer Saugstrahlpumpe 20 verbunden. Die Saugstrahlpumpe 20 besitzt eine Dichtung 21, welche die nicht dargestellte Einlassöffnung im Boden 22 des Schwalltopfes 14 umschließt und gleichzeitig die Saugstrahlpumpe 20 vom Schwalltopf 14 entkoppelt.At the swirl pot 14, a level sensor 15 is attached to determine the amount of fuel in the fuel tank. In the swirl pot 14, a pump holder 16 is fixed with a fuel pump 17 held therein. The fuel pump 17 has an outlet nozzle 18, which is connected via a feed line, not shown, with a nozzle 8 of the housing lower part 5. The fuel pump 17 is connected to a pump pre-filter 19 and a suction jet pump 20. The suction jet pump 20 has a seal 21, which encloses the inlet opening, not shown, in the bottom 22 of the swirl pot 14 and at the same time decouples the suction jet pump 20 from the swirl pot 14.

Im Betrieb der Kraftstofffördereinheit 1 saugt die Saugstrahlpumpe 20 Kraftstoff aus dem Kraftstoffbehälter an und fördert diesen in den Schwalltopf 14. Die Saugstrahlpumpe 20 wird von der Kraftstoffpumpe 17 angetrieben, indem eine Teilmenge des von der Kraftstoffpumpe 17 geförderten Kraftstoffs als Treibstrahl der Saugstrahlpumpe 20 zugeführt wird. Über den Pumpenvorfilter 19 saugt die Kraftstoffpumpe 17 Kraftstoff aus dem Schwalltopf 14 an und fördert diesen über den Auslassstutzen 18 und die Vorlaufleitung zum Feinfilter 3. Der gefilterte Kraftstoff wird über einen Vorlaufstutzen 23 weiter zu der nicht dargestellten Brennkraftmaschine gefördert. Von der Kraftstoffpumpe 17 zuviel geförderter Kraftstoff wird über den Druckregler 9 in den Schwalltopf 14 zurückgeführt.During operation of the fuel delivery unit 1, the suction jet pump 20 sucks fuel from the fuel tank and delivers it to the surge pot 14. The suction jet pump 20 is driven by the fuel pump 17 by supplying a subset of the fuel pumped by the fuel pump 17 as a propulsion jet to the suction jet pump 20. Via the pump pre-filter 19, the fuel pump 17 sucks fuel from the swirl pot 14 and delivers it via the outlet port 18 and the feed line to the fine filter 3. The filtered fuel is conveyed via a flow pipe 23 on to the internal combustion engine, not shown. From the fuel pump 17 too much subsidized fuel is returned via the pressure regulator 9 in the swirl pot 14.

Figur 2 zeigt die einzelnen Komponenten der Kraftstofffördereinheit 1 in einer Explosionsdarstellung. Die Linien zwischen den einzelnen Komponenten geben die einzelnen elektrisch leitenden Verbindungen an, wobei die Liniendarstellung die Art der elektrisch leitenden Verbindung angibt. Jede Komponente besitzt mindestens zwei elektrisch leitende Verbindungen. Das Massepotential liegt an dem schematisch dargestellten Stecker 24 an. FIG. 2 shows the individual components of the fuel delivery unit 1 in an exploded view. The lines between the individual components indicate the individual electrically conductive connections, the line representation indicating the type of electrically conductive connection. Each component has at least two electrically conductive connections. The ground potential is applied to the plug 24 shown schematically.

Sowohl der Füllstandsgeber als auch die Kraftstoffpumpe 17 sind über ihre als Volllinien dargestellten elektrischen Leitungen 25 mit dem Stecker 24 am Flansch 2 mit dem Massepotential verbunden. Der aus Metall bestehende Druckregler 9 ist ebenfalls mit einer elektrischen Leitung 25 mit dem Massepotential verbunden.Both the level sensor and the fuel pump 17 are connected via their illustrated as solid lines electrical lines 25 to the plug 24 on the flange 2 to the ground potential. The existing metal pressure regulator 9 is also connected to an electrical line 25 to the ground potential.

Die aus Metall bestehenden Komponenten Rohr 12 und Spiralfeder 13 weisen eine elektrisch leitende Verbindung von Metall zu Metall auf, die als Punktlinie 26 dargestellt ist.The metal components tube 12 and coil spring 13 have an electrically conductive connection of metal to metal, which is shown as a dotted line 26.

Die Komponenten Filtergehäuse 4, 5, Filterelement 6, Pumpenhalter 16, Gehäuse des Füllstandgebers 15, Schwalltopf 14, Pumpenvorfilter 19, Saugstrahlpumpe 20, Dichtung 21, Vorlaufleitung 27 und das im Boden 22 des Schwalltopfes 14 angeordnete Erstbefüllungsventil 28 bestehen aus POM mit Beimischungen von Kohlenstoff in Form von Ruß. Elektrisch leitende Verbindungen zwischen Komponenten aus elektrisch leitenden Kunststoff sind mit Strichlinien 29 dargestellt. Die elektrisch leitenden Verbindungen zwischen Komponenten aus elektrisch leitenden Kunststoff und Komponenten aus Metall sind mit Strich-Punkt-Linien 30 dargestellt.The components filter housing 4, 5, filter element 6, pump holder 16, housing of the level sensor 15, swirl pot 14, pump pre-filter 19, suction jet pump 20, seal 21, flow line 27 and arranged in the bottom 22 of the swirl pot 14 Erstbefüllungsventil 28 are made of POM with admixtures of carbon in the form of soot. Electrically conductive connections between components of electrically conductive plastic are shown by dashed lines 29. The electrically conductive connections between components of electrically conductive plastic and components made of metal are shown with dash-dot lines 30.

Darüber hinaus sind auch noch weitere elektrisch redundante Verbindungen 24a in möglich, indem die elektrischen Leitungen in Form einer Spule um die Vorlaufleitung 27 angeordnet ist.In addition, even more electrically redundant connections 24a in are possible by the electrical lines in the form of a coil around the flow line 27 is arranged.

Claims (6)

Kraftstofffördereinheit zum Fördern von Kraftstoff aus einem Kraftstoffbehälter zu einer Brennkraftmaschine eines Kraftfahrzeugs, bestehend aus mehreren Komponenten, wobei die Komponenten ein Flansch zum Verschließen einer Öffnung des Kraftstoffbehälters, ein mit dem Flansch über Abstützelemente verbundener Schwalltopf, eine darin angeordnete Kraftstoffpumpe, ein Kraftstofffilter, ein Druckregler, ein Füllstandsgeber und ein Pumpenvorfilter sind, und Mitteln zum Verbinden jeder einzelnen Komponente mit einem Massepotential des Kraftfahrzeugs, dadurch gekennzeichnet, dass vom Kraftstoff durchströmte oder umspülte Komponenten (4 - 6, 9, 12 - 14, 16, 17, 19 - 21, 27, 28) über mindestens zwei elektrisch leitende Verbindungen (25,25a,26,29,30) mit dem Massepotential (24) verbunden sind.A fuel delivery unit for delivering fuel from a fuel tank to an internal combustion engine of a motor vehicle, comprising a plurality of components, the components comprising a flange for closing an opening of the fuel tank, a swirl pot connected to the flange via support members, a fuel pump disposed therein, a fuel filter, a pressure regulator , a filling level transmitter and a pump pre-filter, and means for connecting each individual component to a ground potential of the motor vehicle, characterized in that components through which or through which fuel flows (4 - 6, 9, 12 - 14, 16, 17, 19 - 21, 27, 28) via at least two electrically conductive connections (25,25a, 26,29,30) are connected to the ground potential (24). Kraftstofffördereinheit nach Anspruch 1, dadurch gekennzeichnet, dass mindestens eine der elektrisch leitenden Verbindungen mittels einer elektrischen Leitung (25, 25a) oder mittels der Verbindung (26) von Metall zu Metall erfolgt.Fuel delivery unit according to claim 1, characterized in that at least one of the electrically conductive connections takes place by means of an electrical line (25, 25a) or by means of the connection (26) from metal to metal. Kraftstofffördereinheit nach Anspruch 1, dadurch gekennzeichnet, dass mindestens eine der elektrisch leitenden Verbindungen (30) von einem elektrisch leitfähigen Kunststoff zu Metall erfolgt.Fuel delivery unit according to claim 1, characterized in that at least one of the electrically conductive connections (30) takes place from an electrically conductive plastic to metal. Kraftstofffördereinheit nach Anspruch 1, dadurch gekennzeichnet, dass mindestens eine der elektrisch leitenden Verbindungen (29) von einem elektrisch leitfähigen Kunststoff zu einem elektrisch leitfähigen Kunststoff erfolgt.Fuel delivery unit according to claim 1, characterized in that at least one of the electrically conductive connections (29) takes place from an electrically conductive plastic to an electrically conductive plastic. Kraftstofffördereinheit nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass in mindestens eine der elektrisch leitenden Verbindungen (25, 25a, 26, 29, 30) zwischen einer Komponente (4-6, 9, 12 - 14, 16, 17,19 - 21, 27, 28) mit dem Massepotential (24) eine weitere Komponente (4 - 6, 9, 12 - 14, 16, 17, 19 - 21, 27, 28) zwischengeschaltet ist.Fuel delivery unit according to one of the preceding claims, characterized in that in at least one of the electrically conductive connections (25, 25a, 26, 29, 30) between a component (4-6, 9, 12 - 14, 16, 17,19 - 21 , 27, 28) with the ground potential (24) is a further component (4-6, 9, 12 - 14, 16, 17, 19 - 21, 27, 28) interposed. Kraftstofffördereinheit nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der elektrisch leitfähige Kunststoff ein Kunststoff, vorzugsweise ein Polyoxymethylen oder ein Polyamid mit Beimischungen von elektrisch leitfähigen Bestandteilen, insbesondere Metall oder Kohlenstoff, ist.Fuel delivery unit according to one of the preceding claims, characterized in that the electrically conductive plastic is a plastic, preferably a polyoxymethylene or a polyamide with admixtures of electrically conductive components, in particular metal or carbon.
EP08105505A 2007-11-16 2008-10-07 Fuel delivery unit Ceased EP2060773A3 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2857669B1 (en) * 2013-10-04 2017-12-06 Mahle International GmbH Filter device for a motor vehicle
WO2018033194A1 (en) * 2016-08-15 2018-02-22 Pierburg Pump Technology Gmbh Motor vehicle auxiliary power unit vacuum pump

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101138206B1 (en) * 2010-01-12 2012-05-10 주식회사 코아비스 Fuel Pump Module
DE102010054883A1 (en) * 2010-12-17 2012-06-21 Continental Automotive Gmbh Fuel delivery unit
DE102011078467A1 (en) 2011-06-30 2013-01-03 Robert Bosch Gmbh Plastic housing
DE102013011416A1 (en) 2013-07-09 2015-01-15 Daimler Ag Valve element for adjusting or limiting a pressure of a liquid
DE102013011371A1 (en) 2013-07-09 2015-01-15 Daimler Ag Suction jet pump, in particular for a fuel delivery device
DE102013011409A1 (en) 2013-07-09 2015-01-15 Daimler Ag Modular system for a plurality of Bauvaraianten a fuel delivery device of an internal combustion engine
DE102013011417A1 (en) 2013-07-09 2015-01-15 Daimler Ag Fuel delivery device for conveying fuel of an internal combustion engine
CN104675589A (en) 2015-02-13 2015-06-03 重庆峰瑞塑料制品有限公司 Direct through type fast oil return carbon tank oil tank cover
CN205154469U (en) * 2015-10-27 2016-04-13 南车南京浦镇车辆有限公司 Rail vehicle modularization fuel conveyor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19843019C1 (en) * 1998-09-19 2000-03-09 Bosch Gmbh Robert Fuel feed device for automobile engine fuel injection system has fuel filter housing and fuel tank provided with earth connection via electrically conductive pipe connections
US20030084884A1 (en) * 2001-11-08 2003-05-08 Ulf Sawert Grounded fuel delivery module for fuel system
US20040074995A1 (en) * 2002-10-18 2004-04-22 Denso Corporation Fuel feed apparatus having conductive members grounded each other
US20060219003A1 (en) * 2005-04-05 2006-10-05 Forgue John R Electrostatic charge control for in-tank fuel module components

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5076920B2 (en) * 1990-08-30 1998-05-05 Allied Signal Inc Electrostatically dissipative fuel filter
US5647330A (en) * 1996-07-25 1997-07-15 General Motors Corporation Fuel sender for motor vehicle
DE19712155A1 (en) * 1997-03-22 1998-09-24 Bosch Gmbh Robert Fuel supply system
DE19838555A1 (en) * 1997-08-30 1999-03-04 Mannesmann Vdo Ag Safety device for a fuel tank

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19843019C1 (en) * 1998-09-19 2000-03-09 Bosch Gmbh Robert Fuel feed device for automobile engine fuel injection system has fuel filter housing and fuel tank provided with earth connection via electrically conductive pipe connections
US20030084884A1 (en) * 2001-11-08 2003-05-08 Ulf Sawert Grounded fuel delivery module for fuel system
US20040074995A1 (en) * 2002-10-18 2004-04-22 Denso Corporation Fuel feed apparatus having conductive members grounded each other
US20060219003A1 (en) * 2005-04-05 2006-10-05 Forgue John R Electrostatic charge control for in-tank fuel module components

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2857669B1 (en) * 2013-10-04 2017-12-06 Mahle International GmbH Filter device for a motor vehicle
WO2018033194A1 (en) * 2016-08-15 2018-02-22 Pierburg Pump Technology Gmbh Motor vehicle auxiliary power unit vacuum pump
CN109312751A (en) * 2016-08-15 2019-02-05 皮尔伯格泵技术有限责任公司 Motor vehicle auxiliary power unit vacuum pump
CN109312751B (en) * 2016-08-15 2022-03-15 皮尔伯格泵技术有限责任公司 Vacuum pump of auxiliary power unit of motor vehicle
US11319966B2 (en) 2016-08-15 2022-05-03 Pierburg Pump Technology Gmbh Motor vehicle auxiliary power unit vacuum pump

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DE102007054857A1 (en) 2009-05-20
US7607419B2 (en) 2009-10-27
US20090126699A1 (en) 2009-05-21

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