EP1481156B1 - Fuel delivery unit - Google Patents

Fuel delivery unit Download PDF

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Publication number
EP1481156B1
EP1481156B1 EP03708040A EP03708040A EP1481156B1 EP 1481156 B1 EP1481156 B1 EP 1481156B1 EP 03708040 A EP03708040 A EP 03708040A EP 03708040 A EP03708040 A EP 03708040A EP 1481156 B1 EP1481156 B1 EP 1481156B1
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EP
European Patent Office
Prior art keywords
fuel
level sensor
delivery unit
fuel delivery
unit according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP03708040A
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German (de)
French (fr)
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EP1481156A1 (en
Inventor
Helmut Nather
Wolfgang Sinz
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Siemens AG
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Siemens AG
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Publication of EP1481156A1 publication Critical patent/EP1481156A1/en
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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

Definitions

  • the invention relates to a fuel delivery unit, which for arrangement in a fuel tank of a motor vehicle is provided with a swirl pot for collecting Fuel and with a feed pump to pump fuel from the swirl pot to an internal combustion engine of Motor vehicle.
  • the swirl pot is arranged at a location in the fuel tank, in which he preferably prefilled at a first filling becomes.
  • the swirl pot is filled even if the Fuel tank was drained and a small amount For example, refilled with 5 liters of reserve fuel becomes.
  • the invention is based on the problem of a fuel delivery unit of the type mentioned above, that they allow air to enter the internal combustion engine reliably prevents leading lines.
  • the Swirl pot a level sensor for detecting the therein contained level of fuel and that the level sensor is designed to control the feed pump.
  • the feed pump can be dependent to control from the filling of the swirl pot. hereby it is possible to turn off the pump when the Fuel level in the swirl pot under a designated Limit decreases. This can ensure that the Intake of the pump at any time below the fuel level located. Therefore, even at almost empty Swirl pot reliably prevents air from the feed pump is sucked and leading to the internal combustion engine Lines blocked. In addition, damage to the Feed pump reliably prevented by dry running.
  • the level sensor can be according to an advantageous Development of the invention particularly cost-effective, if he has a reed switch. Continue to deliver such reed switch a unique switching signal, which reliably associate with a certain level of fuel leaves.
  • the level sensor has according to another advantageous Development of the invention a particularly high stability when he is looking over a subset of the height of the Baffle pot has extending pipe.
  • the fuel delivery unit according to the invention can be particularly just mount it when the tube of the level sensor is attached to a lid of the baffle and in protrudes the swirl pot.
  • a jamming of the level sensor can be according to a other advantageous development of the invention reliably prevent when a float of the level sensor on the Tube is guided. This also ensures that after switching off the pump, a refill of reserve fuel recorded and the feed pump to be restarted can.
  • the level sensor is designed according to another advantageous Development of the invention particularly compact and is particularly simple, if a magnetic switch of Level sensor and the float arranged in the pipe are.
  • Sloshing movements of the fuel can affect the level sensor act for a short time and signal faulty that the minimum amount of fuel in the swirl pot falls below is.
  • the influence of the sloshing movements of the fuel can be according to another advantageous development Keep the invention particularly low when the tube the level sensor has a throttle opening.
  • the throttle opening throttles the flow of air or fuel and thus dampens the movements of the fuel in the Pipe.
  • Magnetic fields of a pump driving the electric motor can cause faulty signals from the level sensor have as a consequence.
  • the influence of the magnetic fields of the Electric motor on the level sensor can be according to another advantageous embodiment of the invention keep it low, if the level sensor of the Delivery pump is spaced.
  • the tube is from arranged the delivery pump spatially separated.
  • the control of the driven by the electric motor feed pump requires no extra than the level sensor Components when the level sensor has a switch and is connected directly to the feed pump.
  • the inventive Fuel delivery unit with control electronics for the detection of signals of the level sensor and the Control of the pump at least with an emergency program operate.
  • control electronics can also be Fluctuations in the fuel level in the swirl pot to capture.
  • the level sensor requires no mechanical Damping elements or throttle openings.
  • FIG. 1 shows a fuel tank 1 of a motor vehicle with a fuel delivery unit 2 arranged therein to promote fuel.
  • the fuel delivery unit 2 has a arranged in a swirl pot 3, electric motor driven feed pump 4.
  • the feed pump 4 delivers fuel via a filter 5 arranged in the swirl pot 3 one on a mounting flange 6 of the fuel tank.
  • At the connecting piece 7 can be an unillustrated, to an internal combustion engine connect the motor vehicle leading supply line.
  • the funded by the pump 4 pressure is from a Pressure regulator 8 limited.
  • the feed pump 4 is of a Control electronics 9 via electrical lines 10 with electrical Power supplied.
  • the swirl pot 3 is with a lid 11 locked.
  • the lid 11 allows air exchange the swirl pot 3 with the remaining areas of the fuel tank 1 and ingress of fuel from above into the Swirl pot 3.
  • the swirl pot 3 also has a bottom valve 12 on which fuel penetrate into the swirl pot 3, but can not escape.
  • the swirl pot 3 can Of course, in addition to a not shown Suction jet pump to be filled with fuel.
  • a Level sensor 13 is arranged.
  • the level sensor 13 is also via electrical lines 14 to the control electronics 9 connected and has a on the lid 11 of the Schwall pot 3 attached pipe 15 on.
  • a reed switch 16 is arranged, which is a float 17 faces.
  • the float 17 carries a magnet 18 and slightly moves with the fuel level in the Swirl pot 3.
  • the tube 15 has openings 19, 20 on. These openings 19, 20 can be used as throttle openings be trained to sloshing the fuel to dampen the float 17.
  • Figure 2 shows a sectional view through the swirl pot 3 with the fuel delivery unit 2 of Figure 1 along the line II - II, that the tube 15 of the level sensor 13th has a distance from the feed pump 4. This will an influence of the reed switch 16 by electromagnetic Fields of the electric drive of the feed pump 4 prevents. Furthermore, Figure 2 shows that the swirl pot 3 connecting elements 21 for a holder, not shown. Such holders are shown on the one shown in FIG Mounting flange 6 attached and tighten the swirl pot 3 against the bottom of the fuel tank 1 before.

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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)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

The invention relates to a fuel delivery unit ( 2 ) that is disposed in the fuel tank ( 1 ) of a motor vehicle, the delivery unit comprising a level sensor ( 13 ) that detects when the amount of fuel in a surge chamber ( 3 ) falls below a minimum amount. When the fuel in the surge chamber ( 3 ) falls below a defined minimum, the supply of power to a delivery pump ( 4 ) that is driven by an electromotor is interrupted, thereby preventing the delivery pump ( 4 ) from delivering air when the surge chamber ( 3 ) is empty.

Description

Die Erfindung betrifft eine Kraftstoff-Fördereinheit, welche zur Anordnung in einem Kraftstoffbehälter eines Kraftfahrzeuges vorgesehen ist, mit einem Schwalltopf zum Sammeln von Kraftstoff und mit einer Förderpumpe zur Förderung von Kraftstoff aus dem Schwalltopf zu einer Brennkraftmaschine des Kraftfahrzeuges.The invention relates to a fuel delivery unit, which for arrangement in a fuel tank of a motor vehicle is provided with a swirl pot for collecting Fuel and with a feed pump to pump fuel from the swirl pot to an internal combustion engine of Motor vehicle.

Solche Kraftstoffpumpen werden in heutigen Kraftfahrzeugen häufig eingesetzt und sind aus der Praxis bekannt Siehe dazu z.B. US 4.974.570. Meist ist der Schwalltopf an einer Stelle im Kraftstoffbehälter angeordnet, in der er bei einer Erstbefüllung bevorzugt befüllt wird. Damit wird der Schwalltopf auch dann befüllt, wenn der Kraftstoffbehälter leergefahren wurde und eine geringe Menge von beispielsweise 5 Litern Reservekraftstoff nachgefüllt wird.Such fuel pumps are used in today's motor vehicles frequently used and known in practice See, e.g. US 4,974,570. Mostly the swirl pot is arranged at a location in the fuel tank, in which he preferably prefilled at a first filling becomes. Thus, the swirl pot is filled even if the Fuel tank was drained and a small amount For example, refilled with 5 liters of reserve fuel becomes.

Nachteilig bei den bekannten Kraftstoff-Fördereinheiten ist jedoch, dass bei nahezu leerem Schwalltopf von der Förderpumpe Luft angesaugt werden und sich in den zu der Brennkraftmaschine führenden Leitungen ansammeln kann. Bei einer Nachfüllung von Reservekraftstoff verhindert die in den Leitungen befindliche Luft, dass Kraftstoff zu der Brennkraftmaschine gefördert werden kann. Weiterhin kann ein Trockenlaufen der Förderpumpe zu deren Beschädigung führen.A disadvantage of the known fuel delivery units however, that with almost empty swirl pot from the feed pump Air are sucked in and in to the internal combustion engine can accumulate leading lines. For a refill Reserve fuel prevents those in the pipes air that is fuel to the internal combustion engine can be promoted. Furthermore, dry running of the Feed pump lead to their damage.

Der Erfindung liegt das Problem zugrunde, eine Kraftstoff-Fördereinheit der eingangs genannten Art so zu gestalten, dass sie ein Eindringen von Luft in den zu der Brennkraftmaschine führenden Leitungen zuverlässig verhindert.The invention is based on the problem of a fuel delivery unit of the type mentioned above, that they allow air to enter the internal combustion engine reliably prevents leading lines.

Dieses Problem wird erfindungsgemäß dadurch gelöst, dass der Schwalltopf einen Füllstandssensor zur Erfassung des darin enthaltenen Füllstands an Kraftstoff hat und dass der Füllstandssensor zur Ansteuerung der Förderpumpe ausgebildet ist.This problem is inventively achieved in that the Swirl pot a level sensor for detecting the therein contained level of fuel and that the level sensor is designed to control the feed pump.

Durch diese Gestaltung lässt sich die Förderpumpe in Abhängigkeit von der Befüllung des Schwalltopfes ansteuern. Hierdurch ist es möglich, die Förderpumpe abzuschalten, wenn der Kraftstoffspiegel in dem Schwalltopf unter eine vorgesehene Grenze sinkt. Damit lässt sich sicherstellen, dass sich der Ansaugbereich der Förderpumpe jederzeit unterhalb des Kraftstoffspiegels befindet. Deshalb wird auch bei nahezu leerem Schwalltopf zuverlässig verhindert, dass Luft von der Förderpumpe angesaugt wird und die zu der Brennkraftmaschine führenden Leitungen blockiert. Zudem wird eine Beschädigung der Förderpumpe durch ein Trockenlaufen zuverlässig verhindert.Due to this design, the feed pump can be dependent to control from the filling of the swirl pot. hereby it is possible to turn off the pump when the Fuel level in the swirl pot under a designated Limit decreases. This can ensure that the Intake of the pump at any time below the fuel level located. Therefore, even at almost empty Swirl pot reliably prevents air from the feed pump is sucked and leading to the internal combustion engine Lines blocked. In addition, damage to the Feed pump reliably prevented by dry running.

Der Füllstandssensor lässt sich gemäß einer vorteilhaften Weiterbildung der Erfindung besonders kostengünstig fertigen, wenn er einen Reedschalter aufweist. Weiterhin liefert ein solcher Reedschalter ein eindeutiges Schaltsignal, welches sich einer bestimmten Füllhöhe an Kraftstoff zuverlässig zuordnen lässt.The level sensor can be according to an advantageous Development of the invention particularly cost-effective, if he has a reed switch. Continue to deliver such reed switch a unique switching signal, which reliably associate with a certain level of fuel leaves.

Der Füllstandssensor weist gemäß einer anderen vorteilhaften Weiterbildung der Erfindung eine besonders hohe Stabilität auf, wenn er ein sich über einen Teilbereich der Höhe des Schwalltopfes erstreckendes Rohr hat.The level sensor has according to another advantageous Development of the invention a particularly high stability when he is looking over a subset of the height of the Baffle pot has extending pipe.

Die erfindungsgemäße Kraftstoff-Fördereinheit lässt sich besonders einfach montieren, wenn das Rohr des Füllstandssensors an einem Deckel des Schwalltopfes befestigt ist und in den Schwalltopf hineinragt.The fuel delivery unit according to the invention can be particularly just mount it when the tube of the level sensor is attached to a lid of the baffle and in protrudes the swirl pot.

Ein Verklemmen des Füllstandssensors lässt sich gemäß einer anderen vorteilhaften Weiterbildung der Erfindung zuverlässig verhindern, wenn ein Schwimmer des Füllstandssensors an dem Rohr geführt ist. Hierdurch wird zudem sichergestellt, dass nach Abschalten der Förderpumpe eine Nachfüllung von Reservekraftstoff erfasst und die Förderpumpe erneut gestartet werden kann.A jamming of the level sensor can be according to a other advantageous development of the invention reliably prevent when a float of the level sensor on the Tube is guided. This also ensures that after switching off the pump, a refill of reserve fuel recorded and the feed pump to be restarted can.

Der Füllstandssensor gestaltet sich gemäß einer anderen vorteilhaften Weiterbildung der Erfindung besonders kompakt und ist besonders einfach aufgebaut, wenn ein Magnetschalter des Füllstandssensors und der Schwimmer in dem Rohr angeordnet sind.The level sensor is designed according to another advantageous Development of the invention particularly compact and is particularly simple, if a magnetic switch of Level sensor and the float arranged in the pipe are.

Schwappbewegungen des Kraftstoffs können auf den Füllstandssensor kurzzeitig wirken und fehlerhaft signalisieren, dass die Mindestmenge an Kraftstoff in dem Schwalltopf unterschritten ist. Der Einfluss der Schwappbewegungen des Kraftstoffs lässt sich gemäß einer anderen vorteilhaften Weiterbildung der Erfindung besonders gering halten, wenn das Rohr des Füllstandssensors eine Drosselöffnung aufweist. Die Drosselöffnung drosselt die Strömung der Luft oder des Kraftstoffs und dämpft damit die Bewegungen des Kraftstoffs in dem Rohr.Sloshing movements of the fuel can affect the level sensor act for a short time and signal faulty that the minimum amount of fuel in the swirl pot falls below is. The influence of the sloshing movements of the fuel can be according to another advantageous development Keep the invention particularly low when the tube the level sensor has a throttle opening. The throttle opening throttles the flow of air or fuel and thus dampens the movements of the fuel in the Pipe.

Magnetische Felder eines die Förderpumpe antreibenden Elektromotors können fehlerhafte Signale des Füllstandssensors zur Folge haben. Der Einfluss der magnetischen Felder des Elektromotors auf den Füllstandssensor lässt sich jedoch gemäß einer anderen vorteilhaften Weiterbildung der Erfindung besonders gering halten, wenn der Füllstandssensor von der Förderpumpe beabstandet ist. Vorzugsweise ist das Rohr von der Förderpumpe räumlich getrennt angeordnet.Magnetic fields of a pump driving the electric motor can cause faulty signals from the level sensor have as a consequence. The influence of the magnetic fields of the Electric motor on the level sensor can be according to another advantageous embodiment of the invention keep it low, if the level sensor of the Delivery pump is spaced. Preferably, the tube is from arranged the delivery pump spatially separated.

Die Ansteuerung der von dem Elektromotor angetriebenen Förderpumpe erfordert außer dem Füllstandssensor keine zusätzlichen Bauteile, wenn der Füllstandssensor einen Schalter aufweist und unmittelbar mit der Förderpumpe verbunden ist.The control of the driven by the electric motor feed pump requires no extra than the level sensor Components when the level sensor has a switch and is connected directly to the feed pump.

Bei einem Ausfall des Füllstandssensors lässt sich die erfindungsgemäße Kraftstoff-Fördereinheit mit einer Steuerelektronik zur Erfassung von Signalen des Füllstandssensors und zur Ansteuerung der Förderpumpe zumindest mit einem Notprogramm betreiben. Mit einer solchen Steuerelektronik lassen sich zudem Schwankungen des Kraftstoffspiegels in dem Schwalltopf erfassen. Damit benötigt der Füllstandssensor keine mechanischen Dämpfungselemente oder Drosselöffnungen.In case of failure of the level sensor, the inventive Fuel delivery unit with control electronics for the detection of signals of the level sensor and the Control of the pump at least with an emergency program operate. With such control electronics can also be Fluctuations in the fuel level in the swirl pot to capture. Thus, the level sensor requires no mechanical Damping elements or throttle openings.

Die Erfindung lässt zahlreiche Ausführungsformen zu. Zur weiteren Verdeutlichung ihres Grundprinzips ist eine davon in der Zeichnung dargestellt und wird nachfolgend beschrieben. Diese zeigt in

Fig.1
einen Teilschnitt durch eine erfindungsgemäße, in einem Kraftstoffbehälter montierte KraftstoffFördereinheit,
Fig.2
eine Schnittdarstellung durch die erfindungsgemäße Kraftstoff-Fördereinheit aus Figur 1 entlang der Linie II - II.
The invention allows numerous embodiments. To further clarify its basic principle, one of them is shown in the drawing and will be described below. This shows in
Fig.1
a partial section through an inventive, mounted in a fuel tank fuel delivery unit,
Fig.2
a sectional view through the fuel delivery unit according to the invention of Figure 1 along the line II - II.

Figur 1 zeigt einen Kraftstoffbehälter 1 eines Kraftfahrzeuges mit einer darin angeordneten Kraftstoff-Fördereinheit 2 zur Förderung von Kraftstoff. Die Kraftstoff-Fördereinheit 2 hat eine in einem Schwalltopf 3 angeordnete, elektromotorisch angetriebene Förderpumpe 4. Die Förderpumpe 4 fördert Kraftstoff über einen im Schwalltopf 3 angeordneten Filter 5 zu einem auf einem Montageflansch 6 des Kraftstoffbehälters 1 angeordneten Anschlussstutzen 7. An dem Anschlussstutzen 7 lässt sich eine nicht dargestellte, zu einer Brennkraftmaschine des Kraftfahrzeuges führende Vorlaufleitung anschließen. Der von der Förderpumpe 4 geförderte Druck wird von einem Druckregler 8 begrenzt. Die Förderpumpe 4 wird von einer Steuerelektronik 9 über elektrische Leitungen 10 mit elektrischem Strom versorgt. Der Schwalltopf 3 ist mit einem Deckel 11 verrastet. Der Deckel 11 ermöglicht einen Luftaustausch des Schwalltopfes 3 mit den übrigen Bereichen des Kraftstoffbehälters 1 und ein Eindringen von Kraftstoff von oben in den Schwalltopf 3. Der Schwalltopf 3 weist zudem ein Bodenventil 12 auf, über welches Kraftstoff in den Schwalltopf 3 eindringen, aber nicht entweichen kann. Der Schwalltopf 3 kann selbstverständlich zusätzlich über eine nicht dargestellte Saugstrahlpumpe mit Kraftstoff befüllt werden.FIG. 1 shows a fuel tank 1 of a motor vehicle with a fuel delivery unit 2 arranged therein to promote fuel. The fuel delivery unit 2 has a arranged in a swirl pot 3, electric motor driven feed pump 4. The feed pump 4 delivers fuel via a filter 5 arranged in the swirl pot 3 one on a mounting flange 6 of the fuel tank. 1 arranged connecting piece 7. At the connecting piece 7 can be an unillustrated, to an internal combustion engine connect the motor vehicle leading supply line. The funded by the pump 4 pressure is from a Pressure regulator 8 limited. The feed pump 4 is of a Control electronics 9 via electrical lines 10 with electrical Power supplied. The swirl pot 3 is with a lid 11 locked. The lid 11 allows air exchange the swirl pot 3 with the remaining areas of the fuel tank 1 and ingress of fuel from above into the Swirl pot 3. The swirl pot 3 also has a bottom valve 12 on which fuel penetrate into the swirl pot 3, but can not escape. The swirl pot 3 can Of course, in addition to a not shown Suction jet pump to be filled with fuel.

Mit Abstand zu der Förderpumpe 4 ist in dem Schwalltopf 3 ein Füllstandssensor 13 angeordnet. Der Füllstandssensor 13 ist ebenfalls über elektrische Leitungen 14 mit der Steuerelektronik 9 verbunden und weist ein an dem Deckel 11 des Schwalltopfes 3 befestigtes Rohr 15 auf. Innerhalb des Rohres 15 ist ein Reedschalter 16 angeordnet, welcher einem Schwimmer 17 gegenübersteht. Der Schwimmer 17 trägt einen Magneten 18 und bewegt sich geringfügig mit dem Kraftstoffspiegel im Schwalltopf 3. Um einen Strömungsaustausch des Rohres 15 mit dem Schwalltopf 3 zu gewährleisten, weist das Rohr 15 Öffnungen 19, 20 auf. Diese Öffnungen 19, 20 können als Drosselöffnungen ausgebildet sein um Schwappbewegungen des Kraftstoffs auf den Schwimmer 17 zu dämpfen. Bei einem ausreichenden Füllstand an Kraftstoff im Schwalltopf 3 wird der Schwimmer 17 nach oben mit dem Magneten 18 gegen den Reedschalter 16 gedrückt. Der Füllstandssensor 13 liefert anschließend ein Signal an die Steuerelektronik 9, welche eine Bestromung der Förderpumpe 4 ermöglicht. Sinkt der Füllstand an Kraftstoff in dem Schwalltopf 3 unterhalb des Mindestwertes, entfernt sich der Magnet 18 von dem Reedschalter 16, worauf dieser ein Signal an die Steuerelektronik 9 liefert. Die Steuerelektronik 9 unterbindet anschließend die Bestromung der Förderpumpe 4.At a distance from the feed pump 4 is in the swirl pot 3 a Level sensor 13 is arranged. The level sensor 13 is also via electrical lines 14 to the control electronics 9 connected and has a on the lid 11 of the Schwall pot 3 attached pipe 15 on. Inside the tube 15, a reed switch 16 is arranged, which is a float 17 faces. The float 17 carries a magnet 18 and slightly moves with the fuel level in the Swirl pot 3. To flow exchange of the pipe 15 with to ensure the swirl pot 3, the tube 15 has openings 19, 20 on. These openings 19, 20 can be used as throttle openings be trained to sloshing the fuel to dampen the float 17. With a sufficient Level of fuel in the swirl pot 3 becomes the float 17 up with the magnet 18 against the reed switch 16th pressed. The level sensor 13 then supplies Signal to the control electronics 9, which an energization of the Feed pump 4 allows. The level of fuel drops in the swirl pot 3 below the minimum value removed the magnet 18 from the reed switch 16, whereupon this one Signal to the control electronics 9 supplies. The control electronics 9 then stops energizing the feed pump 4th

Figur 2 zeigt in einer Schnittdarstellung durch den Schwalltopf 3 mit der Kraftstoff-Fördereinheit 2 aus Figur 1 entlang der Linie II - II, dass das Rohr 15 des Füllstandssensors 13 einen Abstand zu der Förderpumpe 4 aufweist. Hierdurch wird eine Beeinflussung des Reedschalters 16 durch elektromagnetische Felder des elektrischen Antriebs der Förderpumpe 4 verhindert. Weiterhin zeigt Figur 2, dass der Schwalltopf 3 Anschlusselemente 21 für einen nicht dargestellten Halter aufweist. Solche Halter werden an dem in Figur 1 dargestellten Montageflansch 6 befestigt und spannen den Schwalltopf 3 gegen den Boden des Kraftstoffbehälters 1 vor.Figure 2 shows a sectional view through the swirl pot 3 with the fuel delivery unit 2 of Figure 1 along the line II - II, that the tube 15 of the level sensor 13th has a distance from the feed pump 4. This will an influence of the reed switch 16 by electromagnetic Fields of the electric drive of the feed pump 4 prevents. Furthermore, Figure 2 shows that the swirl pot 3 connecting elements 21 for a holder, not shown. Such holders are shown on the one shown in FIG Mounting flange 6 attached and tighten the swirl pot 3 against the bottom of the fuel tank 1 before.

Claims (10)

  1. Fuel delivery unit which is provided for arrangement in a fuel tank of a motor vehicle, having a baffle pot for collecting fuel and having a delivery pump for delivering fuel from the baffle pot to an internal combustion engine of the motor vehicle, characterized in that the baffle pot (3) has a level sensor (13) for detecting the level of fuel contained in it, and in that the level sensor (13) is designed for activating the delivery pump (4).
  2. Fuel delivery unit according to Claim 1, characterized in that the level sensor (13) has a reed switch (16).
  3. Fuel delivery unit according to Claim 1 or 2, characterized in that the level sensor (13) has a pipe (15) extending over a subregion of the height of the baffle pot (3).
  4. Fuel delivery unit according to Claim 3, characterized in that the pipe (15) of the level sensor (13) is fastened to a cover (11) of the baffle pot (3) and projects into the baffle pot (3).
  5. Fuel delivery unit according to at least one of the preceding Claims 3 or 4, characterized in that a float (17) of the level sensor (13) is guided on the pipe (15).
  6. Fuel delivery unit according to Claims 2, 3 and 5, characterized in that the reed switch (16) of the level sensor (13) and the float (17) are arranged in the pipe (15).
  7. Fuel delivery unit according to at least one of the preceding Claims 3 to 6, characterized in that the pipe (15) of the level sensor (13) has a constricting opening (19, 20).
  8. Fuel delivery unit according to at least one of the preceding claims, characterized in that the level sensor (13) is spaced apart from the delivery pump (4).
  9. Fuel delivery unit according to at least one of the preceding claims, characterized in that the level sensor (13) has a reed switch (16) and is connected directly to the delivery pump (4).
  10. Fuel delivery unit according to at least one of the preceding claims, characterized by an electronic control system (9) for detecting signals of the level sensor (13) and for activating the delivery pump (4).
EP03708040A 2002-03-01 2003-02-18 Fuel delivery unit Expired - Lifetime EP1481156B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10208824 2002-03-01
DE10208824A DE10208824A1 (en) 2002-03-01 2002-03-01 Fuel delivery unit
PCT/DE2003/000509 WO2003074863A1 (en) 2002-03-01 2003-02-18 Fuel delivery unit

Publications (2)

Publication Number Publication Date
EP1481156A1 EP1481156A1 (en) 2004-12-01
EP1481156B1 true EP1481156B1 (en) 2005-07-13

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EP03708040A Expired - Lifetime EP1481156B1 (en) 2002-03-01 2003-02-18 Fuel delivery unit

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US (1) US7036488B2 (en)
EP (1) EP1481156B1 (en)
AT (1) ATE299554T1 (en)
DE (2) DE10208824A1 (en)
ES (1) ES2244923T3 (en)
WO (1) WO2003074863A1 (en)

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US7377162B2 (en) * 2005-06-28 2008-05-27 Keurig, Incorporated Method and apparatus for liquid level sensing
KR20130139986A (en) * 2011-01-20 2013-12-23 페더럴-모걸 코오포레이숀 Fuel level sensor for marine fuel vapor separator external to unit
DE102020120492A1 (en) 2020-08-04 2022-02-10 Bayerische Motoren Werke Aktiengesellschaft Method for controlling an operating fluid pump, operating fluid container and motor vehicle
DE102022100839A1 (en) 2022-01-14 2023-07-20 Bayerische Motoren Werke Aktiengesellschaft Equipment container and motor vehicle

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ES2244923T3 (en) 2005-12-16
US7036488B2 (en) 2006-05-02
ATE299554T1 (en) 2005-07-15
EP1481156A1 (en) 2004-12-01
WO2003074863A1 (en) 2003-09-12
DE50300770D1 (en) 2005-08-18
US20050103314A1 (en) 2005-05-19
DE10208824A1 (en) 2003-09-11

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