EP1738068A1 - Delivery unit - Google Patents

Delivery unit

Info

Publication number
EP1738068A1
EP1738068A1 EP05707867A EP05707867A EP1738068A1 EP 1738068 A1 EP1738068 A1 EP 1738068A1 EP 05707867 A EP05707867 A EP 05707867A EP 05707867 A EP05707867 A EP 05707867A EP 1738068 A1 EP1738068 A1 EP 1738068A1
Authority
EP
European Patent Office
Prior art keywords
shaped elements
unit according
conveyor unit
segments
elements
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.)
Granted
Application number
EP05707867A
Other languages
German (de)
French (fr)
Other versions
EP1738068B1 (en
Inventor
Torsten Barz
Joachim Hoffmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Continental Automotive GmbH
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP1738068A1 publication Critical patent/EP1738068A1/en
Application granted granted Critical
Publication of EP1738068B1 publication Critical patent/EP1738068B1/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/08—Feeding by means of driven pumps electrically driven
    • F02M37/10—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir
    • F02M37/106—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir the pump being installed in a sub-tank
    • 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
    • F02M37/02—Feeding by means of suction apparatus, e.g. by air flow through carburettors
    • F02M37/025—Feeding by means of a liquid fuel-driven jet pump
    • 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
    • F02M37/50—Filters arranged in or on fuel tanks

Definitions

  • the invention relates to a conveyor unit with a
  • the disadvantage of this device is that the small width of the axially extending gaps reduces the flow cross-section for the fuel flowing to the inlet opening.
  • the flow cross-section In order to ensure an adequate supply of fuel to the intake opening, the flow cross-section must not be undercut.
  • the gap width cannot be chosen to be arbitrarily small, so that the degree of filtering of the gap filter is limited.
  • the present invention is therefore based on the object of providing a delivery unit with a filter which both provides sufficient fuel for the intake opening and also has a high degree of filtering.
  • the arrangement of further areas for flow through opens up further areas for the flow against the filter.
  • the enlargement of the flowable area either allows a larger flow cross-section of the filter or, with the flow cross-section remaining the same, a reduction in the size of the gaps and the areas arranged perpendicularly to them.
  • the Reducing the size of the gaps and areas has the advantage that smaller particles are retained than before, which leads to an increase in the degree of filtering.
  • the areas for flowing through can be produced with little effort and thus inexpensively if at least one, preferably three, contact elements are arranged on the bottom of the baffle with a greater axial length than the shaped elements, so that the baffle with the contact elements sits on the tank bottom.
  • the difference in the axial length of the support elements and the shaped elements determines the distance between the shaped elements and the tank bottom, which results in the areas for flow through.
  • An increase in the degree of filtering can be achieved in a simple manner by arranging the shaped elements in several rows lying one behind the other in relation to the flow direction.
  • An arrangement of the shaped elements in successive rows offset in the flow direction causes a load byrinth formation, which can also improve the degree of filtering.
  • the degree of filtering can be influenced in that the gaps between the shaped elements have different lengths and widths.
  • a simple design of the shaped elements enables the arrangement in segments on the bottom of the baffle. Since the design of the shaped elements determines the degree of filtering, there is a further advantage that the conveying unit can be adapted to the corresponding conditions of use simply by specifically selecting suitable segments with regard to the degree of filtering.
  • This configuration allows the segments to be exchanged, in particular in the case of conveyor units with swirl pots produced by injection molding, while the swirl pot can be retained unchanged.
  • the segments can be exchanged, for example, by means of appropriate inserts in the injection molds.
  • the shaped elements can be arranged in one or more rows on one segment or on several segments on a segment, the segments likewise being arranged in several rows in the flow direction.
  • the filter no longer has to be arranged exclusively at the radially outer end of the baffle bottom.
  • the invention thus allows the shaped elements to be arranged directly in the region of the inlet opening.
  • the filter can also be star-shaped or a polygon.
  • FIG. 2 is a perspective view of the surge pot of the conveyor unit according to FIG. 1,
  • Fig. 3 shows a second embodiment of a baffle in an enlarged view.
  • the fuel tank 1 shown in FIG. 1 contains a delivery unit 2.
  • the delivery unit 2 uses an opening 3 in the fuel tank 1, a flange 4 closing the opening 3 in the fuel tank 1.
  • the funding agencies Unit 2 comprises a swirl pot 5 for receiving fuel and a fuel pump 6 arranged therein, which pumps the fuel to an internal combustion engine (not shown) of the motor vehicle.
  • the baffle 5 in a suction unit in which the fuel pump is arranged outside the baffle.
  • Upright elements 8 are formed on the bottom 7 of the baffle 5 with which the sound pot 5 rests on the tank bottom 9.
  • Shaped elements 10 likewise formed on the bottom 7 of the surge pot 5 are arranged at a distance from one another such that two adjacent shaped elements 10 each include a gap 11.
  • a smaller axial extension of the shaped elements 10 compared to the contact elements 8 causes areas 12 to be formed between the shaped elements 10 and the tank bottom 9, so that fuel can flow through the gaps 11 and the areas 12.
  • the gaps 11 and the areas 12 are chosen so small that particles contained in the fuel are retained by the shaped elements 10.
  • FIG. 2 shows the top view of the bottom 7 of the swirl pot 5 from FIG. 1.
  • the bottom 7 has an inlet opening 13, through which fuel passes from the fuel tank 1 into the swirl pot 5.
  • the inlet opening 13 is provided with spacers 14, which have the same axial length as the support elements 8.
  • the inlet opening 13 is surrounded by shaped elements 10, which are integrally formed on the bottom 7 of the baffle 5. Because of the distance between the shaped elements 10, axial gaps 11 are formed between them.
  • the smaller axial extent of the shaped elements 10 compared to the contact elements elements 8 also causes the formation of areas 12 between the end faces 16 of the shaped elements 10 and the tank bottom 9, one area 12 each connecting two of the axially extending gaps 11. The fuel in the tank 1 can thus pass through the gaps 11 and the areas 12
  • the shaped elements 10 are arranged one behind the other in two rows in the flow direction, a shaped element 8 in the radially inner row following a gap 11 in the radially outer row and vice versa.
  • the shaped elements 10 according to FIG. 3 are arranged asymmetrically.
  • the gaps 11a, 11b formed between two shaped elements 10 vary in length and width.
  • the shaped elements 10 have a smaller axial extent x than the support elements 8 (y), which are seated on the tank bottom, not shown. Because of this difference in the axial extent, regions are formed between the tank bottom 9 and the end faces 16 of the shaped elements 10 12 through which fuel flows to the inlet opening 13 as well as through the gaps 11.

Abstract

The invention relates to a delivery unit (2) comprising a swirl pot (5), a fuel pump (6) placed therein, and a filter, which is placed on the bottom (7) of the swirl pot (5) and which is radially flowed against. This filter is formed by shaped elements axially protruding from the bottom (7) of the swirl pot (5) whereby forming an axially extending gap (11, 11a, 11b) between every two adjacent shaped elements (10), and the filter surrounds an inlet opening (13) located in the bottom (7) of the swirl pot (5). At least one flow-through area (12) is situated perpendicular to the gaps (11, 11a, 11b) and perpendicular to the flow-through direction, this at least one area (12) connecting at least two adjacent gaps (11, 11a, 11b).

Description

Be s ehr eibungMore information
Fördereinheitdelivery unit
Gegenstand der Erfindung ist eine Fördereinheit mit einemThe invention relates to a conveyor unit with a
Schwalltopf, einer darin angeordneten Kraftstoffpumpe und einem am Boden des Schwalltopfes angeordneten radial angeströmten Filter, welcher von axial vom Boden des Schwalltopfes abstehenden Formelementen gebildet ist, so dass zwischen je- weils zwei benachbarten Formelementen jeweils ein axial verlaufender Spalt ausgebildet ist, und der eine im Boden des Schwalltopfes angeordnete Einlassöffnung umgibt. Die Fördereinheit dient zum Fördern von Kraftstoff aus dem Kraftstoffbehälter zu einer Brennkraftmaschine eines Kraftfahr- zeugs .Swirl pot, a fuel pump arranged therein and a radially flowed filter arranged at the bottom of the swirl pot, which is formed by shaped elements projecting axially from the bottom of the swirl pot, so that an axially extending gap is formed between each two adjacent shaped elements, and the one in the Bottom of the surge pot surrounds arranged inlet opening. The delivery unit serves to deliver fuel from the fuel tank to an internal combustion engine of a motor vehicle.
Es ist bekannt, derartige Fördereinheiten in Kraftstoffbehältern einzusetzen. Im Kraftstoff enthaltene Verunreinigungen können in die Kraftstoffpumpe gelangen und diese beschädigen. Um die Kraftstoffpumpe vor diesen Verunreinigungen zu schützen, wird der von der Kraftstoffpumpe angesaugte Kraftstoff gefiltert. Dazu ist der Kraftstoffpumpe ein Grobfilter vorgeschaltet, um die Partikel, die zu einer Beschädigung der Kraftstoffpumpe führen könnten, vom Ansaugbereich der Kraft- stoffpumpe fern zu halten.It is known to use such delivery units in fuel tanks. Impurities contained in the fuel can get into the fuel pump and damage it. In order to protect the fuel pump from these contaminants, the fuel drawn in by the fuel pump is filtered. For this purpose, a coarse filter is installed upstream of the fuel pump in order to keep the particles, which could damage the fuel pump, away from the intake area of the fuel pump.
Neben verschiedenen Filterbauformen, die zusätzlich als separate Teile am Schwalltopf montiert werden, ist es bekannt, am Boden des Schwalltopfes einen Filterkranz anzuordnen. Der Filterkranz wird durch am Boden des Schwalltopfes vorgesehene Anformungen gebildet. Diese Anformungen sind zueinander mit einem Abstand angeordnet und dienen gleichzeitig als Aufstandsfläche für den Schwalltopf. Steht der Schwalltopf auf dem Boden des Kraftstoffbehälters, bilden die Anformungen einen Filter mit axial verlaufenden Spalten, der radial angeströmt wird. Die Einlassöffnung, durch die der vorgefilterte Kraftstoff in den Schwalltopf gelangt, befindet sich inner- halb dieses Kranzes von Anformungen. Die Breite der axial verlaufenden Spalte ist dabei ein Maß für den Filtergrad des Spaltfilters . Der Nachteil dieser Vorrichtung besteht darin, dass sich durch die geringe Breite der axial verlaufenden Spalte der Durchflussquerschnitt für den zur Einlassöffnung strömenden Kraftstoff verringert. Um eine ausreichende Versorgung der Ansaugöffnung mit Kraftstoff zu gewährleisten, darf ein bestimmter Durchflussquerschnitt nicht unterschritten werden. Infolge dessen kann die Spaltbreite nicht beliebig klein gewählt werden, so dass der Filtergrad des Spalt- filters begrenzt ist.In addition to various filter designs, which are additionally mounted as separate parts on the baffle, it is known to arrange a filter ring on the bottom of the baffle. The filter ring is formed by projections provided on the bottom of the surge pot. These projections are arranged at a distance from one another and at the same time serve as a contact surface for the surge pot. The surge pot stands up the bottom of the fuel tank, the formations form a filter with axially extending gaps, which is flowed radially. The inlet opening, through which the pre-filtered fuel reaches the swirl pot, is located within this ring of projections. The width of the axially extending gap is a measure of the degree of filtering of the gap filter. The disadvantage of this device is that the small width of the axially extending gaps reduces the flow cross-section for the fuel flowing to the inlet opening. In order to ensure an adequate supply of fuel to the intake opening, the flow cross-section must not be undercut. As a result, the gap width cannot be chosen to be arbitrarily small, so that the degree of filtering of the gap filter is limited.
Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, eine Fördereinheit mit einem Filter zu schaffen, der sowohl ausreichend Kraftstoff für die Ansaugöffnung bereits.tellt als auch einen hohen Filtergrad besitzt.The present invention is therefore based on the object of providing a delivery unit with a filter which both provides sufficient fuel for the intake opening and also has a high degree of filtering.
Erfindungsgemäß wird die Aufgabe dadurch gelöst, dass senkrecht zu den Spalten und senkrecht zur Durchströmrichtung mindestens ein Bereich zum Durchströmen angeordnet ist, und dass der mindestens eine Bereich mindestens zwei benachbarte Spalte verbindet .According to the invention, the object is achieved in that at least one area for flowing through is arranged perpendicular to the columns and perpendicular to the flow direction, and in that the at least one area connects at least two adjacent columns.
Durch die Anordnung weiterer Bereiche zum Durchströmen werden weitere Flächen für das Anströmen des Filters erschlossen. Die Vergrößerung der anströmbaren Fläche erlaubt entweder ei- nen größeren Durchströmquerschnitt des Filters oder bei gleich bleibendem Durchströmquerschnitt eine Verkleinerung der Spalte und der dazu senkrecht angeordneten Bereiche. Die Verkleinerung der Spalte und Bereiche hat den Vorteil, dass kleinere Partikel als bisher zurückgehalten werden, was zu einer Erhöhung des Filtergrades führt.The arrangement of further areas for flow through opens up further areas for the flow against the filter. The enlargement of the flowable area either allows a larger flow cross-section of the filter or, with the flow cross-section remaining the same, a reduction in the size of the gaps and the areas arranged perpendicularly to them. The Reducing the size of the gaps and areas has the advantage that smaller particles are retained than before, which leads to an increase in the degree of filtering.
Die Bereiche zum Durchströmen lassen sich mit geringem Aufwand und somit kostengünstig herstellen, wenn am Boden des Schwalltopfes durch mindestens ein, vorzugsweise drei, Aufstandselemente mit einer größeren axialen Länge als die Formelemente angeordnet sind, so dass der Schwalltopf mit den Aufstandselementen auf dem Tankboden aufsitzt. Die Differenz der axialen Länge der Aufstandselemente und der Formelemente bestimmt den Abstand der Formelemente zum Tankboden, woraus sich die Bereiche zum Durchströmen ergeben.The areas for flowing through can be produced with little effort and thus inexpensively if at least one, preferably three, contact elements are arranged on the bottom of the baffle with a greater axial length than the shaped elements, so that the baffle with the contact elements sits on the tank bottom. The difference in the axial length of the support elements and the shaped elements determines the distance between the shaped elements and the tank bottom, which results in the areas for flow through.
In einer weiteren vorteilhaften Ausgestaltung lassen sich zu- sätzliche Aufstandselemente zur Schaffung der Bereiche zum Durchströmen vermeiden, wenn die Formelemente mit unterschiedlichen axialen Längen ausgebildet sind. Dabei ist es ausreichend mindestens eins, vorzugsweise drei, Formelemente mit einer größeren axialen Länge auszubilden. Bei sehr vielen Formelementen können auch 5% bis 50% der Formelemente eine größere axiale Länge aufweisen. Diese Formelemente sitzen auf dem Tankboden auf, während die anderen Formelemente in einem Abstand zum Tankboden angeordnet sind, so dass sich zwischen den Stirnflächen der axial kürzeren Formelemente und dem Tankboden die Bereiche zum Durchströmen ausbilden.In a further advantageous embodiment, additional contact elements to create the areas for flow through can be avoided if the shaped elements are designed with different axial lengths. It is sufficient to form at least one, preferably three, shaped elements with a greater axial length. In the case of a large number of shaped elements, 5% to 50% of the shaped elements can also have a greater axial length. These shaped elements sit on the tank bottom, while the other shaped elements are arranged at a distance from the tank bottom, so that the areas for flow through form between the end faces of the axially shorter shaped elements and the tank bottom.
Eine Erhöhung des Filtergrades lässt sich in einfacher Weise durch die Anordnung der Formelemente bezogen auf die Durchströmrichtung in mehreren hintereinander liegenden Reihen erzielen. Eine in Durchströmrichtung versetzte Anordnung der Formelemente in aufeinander folgenden Reihen bewirkt eine La- byrinthbildung, wodurch sich der Filtergrad ebenfalls verbessern lässt.An increase in the degree of filtering can be achieved in a simple manner by arranging the shaped elements in several rows lying one behind the other in relation to the flow direction. An arrangement of the shaped elements in successive rows offset in the flow direction causes a load byrinth formation, which can also improve the degree of filtering.
Ein selektiver Filter wird durch die Anordnung von Formelemente gleicher axialer Länge in einer Reihe ereicht. Dabei ist es vorteilhaft, wenn die Formelemente der radial äußeren Reihe eine geringere axiale Länge als die Formelemente der radial inneren Reihen besitzen.A selective filter is achieved by arranging shaped elements of the same axial length in a row. It is advantageous if the shaped elements of the radially outer row have a smaller axial length than the shaped elements of the radially inner rows.
In einer weiteren Ausgestaltung lässt sich der Filtergrad dadurch beeinflussen, dass die zwischen den Formelementen be- findlichen Spalte in ihrer Länge und Breite unterschiedlich ausgebildet sind.In a further embodiment, the degree of filtering can be influenced in that the gaps between the shaped elements have different lengths and widths.
Eine einfache Gestaltung der Formelemente ermöglicht die Anordnung in Segmenten am Boden des Schwalltopfes . Da die Gestaltung der Formelemente den Filtergrad bestimmt, besteht ein weiterer Vorteil darin, dass die Fördereinheit allein durch gezielte Auswahl geeigneter Segmente hinsichtlich des Filtergrades an die entsprechenden Einsatzbedingungen angepasst werden kann. Insbesondere bei Fördereinheiten mit im Spritzgussverfahren hergestellten Schwalltöpfen erlaubt diese Aus- gestaltung das Austauschen der Segmente, während der Schwalltopf unverändert beibehalten werden kann. Das Austauschen der Segmente lässt sich beispielsweise durch entsprechende Einsätze in den Spritzgießwerkzeugen realisieren.A simple design of the shaped elements enables the arrangement in segments on the bottom of the baffle. Since the design of the shaped elements determines the degree of filtering, there is a further advantage that the conveying unit can be adapted to the corresponding conditions of use simply by specifically selecting suitable segments with regard to the degree of filtering. This configuration allows the segments to be exchanged, in particular in the case of conveyor units with swirl pots produced by injection molding, while the swirl pot can be retained unchanged. The segments can be exchanged, for example, by means of appropriate inserts in the injection molds.
In einer Weiterbildung der Erfindung wird das Anpassen an verschiedene Einsatzbedingungen erleichtert, wenn die Segmente lösbar mit dem Schwalltopf verbunden sind, vorzugsweise mittels Rast- oder Steckverbindungen. Eine lösbare Verbindung der Segmente am Schwalltopf erlaubt zudem ein Auswechseln der Segmente, insbesondere bei Verschleiß oder Zusetzen des Fil- ters. Eine Schwächung des Filtergrades wird vermieden, wenn der Abstand zweiter benachbarter Segmente nicht größer als der Abstand der Formelemente untereinander ist.In a further development of the invention, the adaptation to different operating conditions is made easier if the segments are detachably connected to the swirl pot, preferably by means of latching or plug connections. A detachable connection of the segments on the swirl pot also allows the segments to be replaced, particularly if the filter is worn or clogged. A weakening of the degree of filtering is avoided if the distance between two adjacent segments is not greater than the distance between the shaped elements.
Entsprechend der Anordnung der Formelemente in mehreren Reihen bezogen auf die Durchströmrichtung, können auf einem Segment die Formelemente in einer oder mehreren Reihen auf jeweils einem Segment oder auf mehrere Segmenten angeordnet sein, wobei die Segmente ebenfalls in Durchströmrichtung in mehreren Reihen angeordnet sind.Corresponding to the arrangement of the shaped elements in several rows in relation to the flow direction, the shaped elements can be arranged in one or more rows on one segment or on several segments on a segment, the segments likewise being arranged in several rows in the flow direction.
Aufgrund des verbesserten Filtergrades muss der Filter nicht mehr ausschließlich am radial äußeren Ende des Schwalltopfbodens angeordnet sein. So erlaubt die Erfindung die Anordnung der Formelemente unmittelbar im Bereich der Einlassöffnung.Due to the improved degree of filtering, the filter no longer has to be arranged exclusively at the radially outer end of the baffle bottom. The invention thus allows the shaped elements to be arranged directly in the region of the inlet opening.
Neben einer kreisförmigen Ausbildung kann der Filter auch sternförmig oder als Polygon ausgebildet sein.In addition to being circular, the filter can also be star-shaped or a polygon.
An mehreren Ausführungsbeispielen wird die Erfindung näher beschrieben. Es zeigen:The invention is described in more detail using several exemplary embodiments. Show it:
Fig. 1 einen Kraftstoffbehälter mit einer Fördereinheit,1 shows a fuel tank with a delivery unit,
Fig. 2 eine perspektivische Darstellung des Schwalltopfes der Fördereinheit nach Figur 1,2 is a perspective view of the surge pot of the conveyor unit according to FIG. 1,
Fig. 3 eine zweite Ausführungsform eines Schwalltopfes in einer vergrößerten Darstellung.Fig. 3 shows a second embodiment of a baffle in an enlarged view.
Der in Figur dargestellte Kraftstoffbehälter 1 enthält eine Fördereinheit 2. Die Fördereinheit 2 wird eine Öffnung 3 des Kraftstoffbehälters 1 eingesetzt, wobei ein Flansch 4 die Öffnung 3 im Kraftstoffbehälter 1 verschließt. Die Förderein- heit 2 umfasst einen Schwalltopf 5 zur Aufnahme von Kraftstoff und eine darin angeordnete Kraftstoffpumpe 6, die den Kraftstoff zu einer nicht dargestellten Brennkraftmaschine des Kraftfahrzeugs fördert. Darüber hinaus ist es denkbar, den Schwalltopf 5 auch in einer Ansaugeinheit, bei der die Kraftstoffpumpe außerhalb des Schwalltopfes angeordnet ist, zu verwenden.The fuel tank 1 shown in FIG. 1 contains a delivery unit 2. The delivery unit 2 uses an opening 3 in the fuel tank 1, a flange 4 closing the opening 3 in the fuel tank 1. The funding agencies Unit 2 comprises a swirl pot 5 for receiving fuel and a fuel pump 6 arranged therein, which pumps the fuel to an internal combustion engine (not shown) of the motor vehicle. In addition, it is conceivable to use the baffle 5 in a suction unit in which the fuel pump is arranged outside the baffle.
Am Boden 7 des Schwalltopfes 5 sind Aufstandselemente 8 ange- formt, mit denen der Schalltopf 5 auf dem Tankboden 9 aufsitzt. Ebenfalls am Boden 7 des Schwalltopfes 5 ausgebildete Formelemente 10 sind derart in Abständen zueinander angeordnet, dass zwei benachbarte Formelemente 10 jeweils einen Spalt 11 einschließen. Eine geringere axiale Erstreckung der Formelemente 10 gegenüber den Aufstandselementen 8 bewirkt die Bildung von Bereichen 12 zwischen den Formelementen 10 und dem Tankboden 9, so dass Kraftstoff durch die Spalte 11 und die Bereiche 12 strömen kann. Die Spalte 11 und die Be- reiche 12 sind dabei so klein gewählt, dass im Kraftstoff enthaltene Partikel durch die Formelemente 10 zurückgehalten werden.Upright elements 8 are formed on the bottom 7 of the baffle 5 with which the sound pot 5 rests on the tank bottom 9. Shaped elements 10 likewise formed on the bottom 7 of the surge pot 5 are arranged at a distance from one another such that two adjacent shaped elements 10 each include a gap 11. A smaller axial extension of the shaped elements 10 compared to the contact elements 8 causes areas 12 to be formed between the shaped elements 10 and the tank bottom 9, so that fuel can flow through the gaps 11 and the areas 12. The gaps 11 and the areas 12 are chosen so small that particles contained in the fuel are retained by the shaped elements 10.
Figur 2 zeigt die Draufsicht auf den Boden 7 des Schwalltopfes 5 aus Figur 1. Der Boden 7 besitzt eine Einlassöffnung 13, durch die Kraftstoff aus dem Kraftstoffbehälter 1 in den Schwalltopf 5 gelangt. Die Einlassöffnung 13 ist mit Abstandshaltern 14 versehen, welche die gleiche axiale Länge wie die Aufstandselemente 8 besitzen. Die Einlassöffnung 13 ist von Formelementen 10 umgeben, welche einteilig am Boden 7 des Schwalltopfes 5 angeformt sind. Aufgrund des Abstandes der Formelemente 10 untereinander sind zwischen diesen axiale verlaufende Spalte 11 ausgebildet. Die geringere axiale Erstreckung der Formelemente 10 gegenüber den Aufstandsele- menten 8 bewirkt zudem die Ausbildung von Bereichen 12 zwischen den Stirnflächen 16 der Formelemente 10 und dem Tankboden 9, wobei je ein Bereich 12 jeweils zwei der axial verlaufenden Spalte 11 verbindet . Der im Tank 1 befindliche Kraft- stoff kann so durch die Spalte 11 und die Bereiche 12 zurFIG. 2 shows the top view of the bottom 7 of the swirl pot 5 from FIG. 1. The bottom 7 has an inlet opening 13, through which fuel passes from the fuel tank 1 into the swirl pot 5. The inlet opening 13 is provided with spacers 14, which have the same axial length as the support elements 8. The inlet opening 13 is surrounded by shaped elements 10, which are integrally formed on the bottom 7 of the baffle 5. Because of the distance between the shaped elements 10, axial gaps 11 are formed between them. The smaller axial extent of the shaped elements 10 compared to the contact elements elements 8 also causes the formation of areas 12 between the end faces 16 of the shaped elements 10 and the tank bottom 9, one area 12 each connecting two of the axially extending gaps 11. The fuel in the tank 1 can thus pass through the gaps 11 and the areas 12
Einlassöffnung 13 gelangen. Im Kraftstoff enthaltene Partikel werden von den Formelementen 10 von der Einlassöffnung 13 ferngehalten. Durch entsprechende Gestaltung der axialen Erstreckung der Formelemente 10 und der AufStandselemente 8 lässt sich die axiale Höhe der Bereiche 12 und damit der Filtergrad gezielt einstellen. Zur Erhöhung des Filtergrades sind die Formelemente 8 in Durchströmrichtung hintereinander in zwei Reihen angeordnet, wobei auf einen Spalt 11 in der radial äußeren Reihe ein Formelement 8 in der radial inneren Reihe folgt und umgekehrt.Enter inlet opening 13. Particles contained in the fuel are kept away from the inlet opening 13 by the shaped elements 10. The axial height of the areas 12 and thus the degree of filtering can be set in a targeted manner by appropriately designing the axial extent of the shaped elements 10 and the standing elements 8. To increase the degree of filtering, the shaped elements 8 are arranged one behind the other in two rows in the flow direction, a shaped element 8 in the radially inner row following a gap 11 in the radially outer row and vice versa.
Figur 3 zeigt eine vergrößerte Darstellung der Einlassöffnung 13 im Boden 7 des Schwalltopfes 5. Die Formelemente 10 sind in vier Segmenten 15 um die Einlassöffnung 13 angeordnet. Die Segmente 15 können sowohl einstückig als auch lösbar mittels einer Rast- und Steckverbindung mit dem Schwalltopf 5 verbunden werden. Um die Filterwirkung nicht herabzusetzen, entsprechen die Abstände 16 der Segmente 15 im Wesentlichen den Breiten der Spalte 11.FIG. 3 shows an enlarged view of the inlet opening 13 in the bottom 7 of the baffle 5. The shaped elements 10 are arranged in four segments 15 around the inlet opening 13. The segments 15 can be connected in one piece as well as detachably to the swirl pot 5 by means of a latching and plug connection. In order not to reduce the filter effect, the distances 16 of the segments 15 essentially correspond to the widths of the gaps 11.
Im Gegensatz zu Figur 2 sind die Formelemente 10 gemäß Figur 3 asymmetrisch angeordnet. Die zwischen zwei Formelementen 10 ausgebildeten Spalte 11a, 11b variieren in ihrer Länge und Breite. Die Formelemente 10 besitzen eine geringere axiale Erstreckung x als die Aufstandselemente 8 (y) , die auf dem nicht dargestellten Tankboden aufsitzen. Aufgrund dieser Differenz in axialer Erstreckung bilden sich zwischen dem Tank- boden 9 und den Stirnflächen 16 der Formelemente 10 Bereiche 12, durch die ebenso wie durch die Spalte 11 Kraftstoff zu der Einlassöffnung 13 strömt. In contrast to FIG. 2, the shaped elements 10 according to FIG. 3 are arranged asymmetrically. The gaps 11a, 11b formed between two shaped elements 10 vary in length and width. The shaped elements 10 have a smaller axial extent x than the support elements 8 (y), which are seated on the tank bottom, not shown. Because of this difference in the axial extent, regions are formed between the tank bottom 9 and the end faces 16 of the shaped elements 10 12 through which fuel flows to the inlet opening 13 as well as through the gaps 11.

Claims

Patentansprüche claims
1. Fördereinheit mit einem Schwalltopf, einer darin angeordneten Kraftstoffpumpe und einem am Boden des Schwalltop- fes angeordneten radial angeströmten Filter, welcher von axial vom Boden des Schwalltopfes abstehenden Formelementen gebildet ist, so dass zwischen jeweils zwei benachbarten Formelementen jeweils ein axial verlaufender Spalt ausgebildet ist, und der eine im Boden des Schwalltopfes angeordnete Einlassöffnung umgibt, dadurch ge kenn z ei chn et , dass senkrecht zu den Spalten (11, 11a, 11b) und senkrecht zur Durchströmrichtung mindestens ein Bereich (12) zum Durchströmen angeordnet ist, und dass der mindestens eine Bereich (12) mindestens zwei benachbarte Spalte (11, 11a, 11b) verbindet.1. Delivery unit with a baffle, a fuel pump arranged therein and a radially flowed filter arranged at the bottom of the baffle, which is formed by molded elements projecting axially from the bottom of the baffle, so that an axially extending gap is formed between each two adjacent molded elements , and which surrounds an inlet opening arranged in the bottom of the swirl pot, characterized in that at least one area (12) for flowing through is arranged perpendicular to the columns (11, 11a, 11b) and perpendicular to the flow direction, and that at least one area (12) connects at least two adjacent columns (11, 11a, 11b).
2. Fördereinheit nach Anspruch 1, dadurch ge kenn z e i chn e t , dass die Bereiche (12) zum Durchströmen durch mindestens eins, vorzugsweise drei, am Boden (7) des Schwalltopfes (5) angeordnete Aufstandsele- mente (8) mit einer größeren axialen Länge als die Formelemente (10) gebildet sind.2. Conveyor unit according to claim 1, characterized in that the areas (12) for flowing through at least one, preferably three, at the bottom (7) of the swirl pot (5) arranged contact elements (8) with a larger axial Length as the shaped elements (10) are formed.
3. Fördereinheit nach Anspruch 1 oder 2, dadurch gekenn z e i chn et , dass die Bereiche (12) zum Durchströmen durch Formelemente (10) mit unterschiedli- chen axialen Längen gebildet sind.3. Conveyor unit according to claim 1 or 2, characterized in that the areas (12) for flowing through shaped elements (10) are formed with different axial lengths.
4. Fördereinheit nach zumindest einem der Ansprüche 1 bis 3, dadur ch ge kenn z e i chnet , dass die Formelemente (8) in Durchströmrichtung in mehreren hintereinander liegenden Reihen angeordnet sind. 4. Conveyor unit according to at least one of claims 1 to 3, characterized in that the shaped elements (8) are arranged in the flow direction in a plurality of rows one behind the other.
5. Fördereinheit nach zumindest einem der Ansprüche 1 bis 3, dadur ch ge kenn z e i chnet , dass die Formelemente (10) gleicher axialer Länge in einer Reihe angeordnet sind.5. Conveyor unit according to at least one of claims 1 to 3, characterized in that the shaped elements (10) of the same axial length are arranged in a row.
6. Fördereinheit nach zumindest einem der vorhergehenden Ansprüche, da durch ge kenn z e i chnet , dass die Formelemente (10) der radial äußeren Reihe eine geringere axiale Länge als die Formelemente (8) der radial inneren Reihen besitzen.6. Conveyor unit according to at least one of the preceding claims, since by ge characteristic that the shaped elements (10) of the radially outer row have a smaller axial length than the shaped elements (8) of the radially inner rows.
7. Fördereinheit nach einem der vorhergehenden Ansprüche, dadur ch ge kennz e i chnet , dass die axial verlaufenden Spalten (11, 11a, 11b) zwischen den Formelementen (10) unterschiedliche Längen und Breiten besitzen.7. Conveyor unit according to one of the preceding claims, characterized in that the axially extending columns (11, 11a, 11b) between the shaped elements (10) have different lengths and widths.
8. Fördereinheit nach einem der vorhergehenden Ansprüche, dadur ch gekenn z ei chnet , dass die Formelemente (10) in Segmenten (15) am Boden (7) des Schwalltopfes (5) angeordnet sind.8. Conveyor unit according to one of the preceding claims, characterized in that the shaped elements (10) are arranged in segments (15) on the bottom (7) of the swirl pot (5).
9. Fördereinheit nach Anspruch 8, dadurch gekennz ei chnet , dass die Segmente (15) lösbar am Boden (7) des Schwalltopfes (5) angeordnet sind.9. Conveyor unit according to claim 8, characterized in that the segments (15) are detachably arranged on the bottom (7) of the swirl pot (5).
10. Fördereinheit nach Anspruch 8, dadurch gekennzeichnet, dass die Segmente (15) einteilig am Schwalltopf (5) angeformt sind.10. Conveyor unit according to claim 8, characterized in that the segments (15) are integrally formed on the baffle (5).
11. Fördereinheit nach einem der Ansprüche 8 bis 10, d a - dur ch ge kenn z e i chnet , dass der Abstand zweiter benachbarter Segmente (15) nicht größer als der Abstand der Formelemente (10) untereinander ist. 11. Conveyor unit according to one of claims 8 to 10, so that the distance between two adjacent segments (15) is not greater than the distance between the shaped elements (10).
12. Fördereinheit nach einem der Ansprüche 8 bis 11, da dur ch ge kenn z e i chnet , dass die Segmente (15) in Durchströmrichtung in mehreren Reihen angeordnet sind.12. Conveyor unit according to one of claims 8 to 11, since the characteristic that the segments (15) are arranged in several rows in the flow direction.
13. Fördereinheit nach einem der vorhergehenden Ansprüche, dadur ch ge kenn z e i chnet , dass die Formelemente (10) kreisförmig angeordnet sind.13. Conveyor unit according to one of the preceding claims, characterized in that the shaped elements (10) are arranged in a circle.
14. Fördereinheit nach einem der vorhergehenden Ansprüche 1- 12, dadurch ge kenn z ei chnet , dass die Formelemente (10) in Form eines Polygons angeordnet sind. 14. Conveyor unit according to one of the preceding claims 1- 12, characterized in that the shaped elements (10) are arranged in the form of a polygon.
EP05707867A 2004-03-03 2005-01-27 Delivery unit Expired - Fee Related EP1738068B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004010358A DE102004010358B3 (en) 2004-03-03 2004-03-03 delivery unit
PCT/EP2005/050349 WO2005085623A1 (en) 2004-03-03 2005-01-27 Delivery unit

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EP1738068A1 true EP1738068A1 (en) 2007-01-03
EP1738068B1 EP1738068B1 (en) 2011-08-24

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US (1) US7350509B2 (en)
EP (1) EP1738068B1 (en)
JP (1) JP4523636B2 (en)
KR (1) KR101251719B1 (en)
CN (1) CN100472059C (en)
DE (1) DE102004010358B3 (en)
WO (1) WO2005085623A1 (en)

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Publication number Publication date
US20070215537A1 (en) 2007-09-20
JP2007525617A (en) 2007-09-06
US7350509B2 (en) 2008-04-01
KR101251719B1 (en) 2013-04-05
WO2005085623A1 (en) 2005-09-15
CN1926322A (en) 2007-03-07
CN100472059C (en) 2009-03-25
JP4523636B2 (en) 2010-08-11
KR20060135840A (en) 2006-12-29
EP1738068B1 (en) 2011-08-24
DE102004010358B3 (en) 2005-12-22

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