EP1861625B1 - Jet suction pump - Google Patents

Jet suction pump Download PDF

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Publication number
EP1861625B1
EP1861625B1 EP06704618.5A EP06704618A EP1861625B1 EP 1861625 B1 EP1861625 B1 EP 1861625B1 EP 06704618 A EP06704618 A EP 06704618A EP 1861625 B1 EP1861625 B1 EP 1861625B1
Authority
EP
European Patent Office
Prior art keywords
pot
suction pump
jet pump
jet suction
suction
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
EP06704618.5A
Other languages
German (de)
French (fr)
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EP1861625A1 (en
Inventor
Klaus Markefka
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
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Continental Automotive GmbH
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Filing date
Publication date
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Publication of EP1861625A1 publication Critical patent/EP1861625A1/en
Application granted granted Critical
Publication of EP1861625B1 publication Critical patent/EP1861625B1/en
Ceased legal-status Critical Current
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/02—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid
    • F04F5/10—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid displacing liquids, e.g. containing solids, or liquids and elastic fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
    • F04F5/46—Arrangements of nozzles
    • F04F5/464—Arrangements of nozzles with inversion of the direction of flow
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/85978—With pump
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86348—Tank with internally extending flow guide, pipe or conduit

Definitions

  • the invention relates to a suction jet pump with amaschinestrahldüse, a mixing tube, a suction port, a suction line connected thereto and a pot in which at least a portion of the mixing tube is arranged.
  • the suction jet pump serves to convey fuel within a fuel tank or from a fuel tank in a surge pot disposed within the fuel tank.
  • fuel tanks have various shapes. With the adaptation of the fuel tank to the motor vehicle using the available space created fuel tank, which are divided into several chambers.
  • suction jet pumps are arranged at the bottom of the chambers or the areas of the fuel tank, from which the fuel is to be conveyed to the delivery unit. With the arrangement of the suction of the suction jet pump at the bottom of the fuel tank, the suction jet pump is always in the fuel and is therefore always ready for use. Such suction jet pumps are characterized by a good efficiency out.
  • the funding factor that is, the ratio of sum beam to propellant jet, is at least 7.
  • the disadvantage here is that with the fuel line to the suction jet pump and the sum of the suction jet pump line two lines are required, which must be installed and fixed in the fuel tank.
  • suction suction jet pumps which are arranged in the region of the conveyor unit. From the suction jet pump leads a suction line in the area from which the fuel is to be conveyed. To generate the necessary negative pressure in the suction line, the suction jet pump has a special jet nozzle.
  • the outlet opening of the propulsion jet nozzle is designed as a slot.
  • the propulsion jet is fanned out after emerging from the propulsion jet nozzle.
  • the fanned out propulsion jet closes the mixing tube, whereby the necessary negative pressure is generated in order to be able to suck in the fuel via the relatively long intake line.
  • a disadvantage of this embodiment is the low delivery factor of the suction suction jet pump, which is approximately at 2. This low conveying factor is due to the fanning of the propulsion jet after leaving themaschinedüse.
  • a suction jet pump see for example WO 2004/018864 A , which is arranged with the outlet end of the mixing tube in a pot, so that the conveying medium located in the pot seals the mixing tube end against the atmosphere.
  • a negative pressure will be generated at the mixing tube inlet, which contributes to the improvement of the suction power.
  • the suction power is not achieved, which suggests that the liquid closure of the Mischrohraustritts is not always guaranteed. This can be caused, for example, by the fact that there is too little amount of the pumped liquid in the pot.
  • the present invention is therefore based on the object to provide a suction suction jet pump with an improved delivery factor, the suction power is ensured even under unfavorable circumstances.
  • the suction jet pump should also be simple and compact and easy to assemble.
  • the object is achieved in that the bottom of the pot has a deviating from a plane surface shape.
  • the conveyed medium emerging at high speed from the mixing tube is split or swirled.
  • This turbulence of the medium ensures a permanent and reliable liquid closure of the outlet opening of the mixing tube projecting into the pot, so that a sufficient negative pressure can form in the suction jet pump, which makes it possible to suck in the medium to be conveyed over a long distance.
  • the deviating from a plane surface shape is a depression in the form of a trough or pocket in the bottom region of the pot.
  • the pot bottom is given with arranged on the bottom of the pot ribs.
  • the ribs can be integrally formed on the bottom of the pot, when the pot is made by injection molding.
  • the costs for the production of the recess or the ribs can be reduced if they are arranged in the region of the outlet opening of the mixing tube.
  • the deviating from a plane surface shape is a funnel-shaped bottom surface which extends over the entire bottom portion.
  • the pot is connected in a further embodiment with the suction jet pump.
  • the pot can be integrally formed with the suction jet pump, preferably on the mixing tube.
  • the production of the suction jet pump according to the invention is particularly simple if the pot is connected by means of a latching or plug connection with the suction jet pump. In this way, the pot forms a unit with the suction jet pump.
  • the suction jet pump can thereby be used at any location.
  • pot and suction jet pump designed advantageous if both the suction jet pump and the pot latching or plug-in elements, which engage with each other, are present.
  • the pot and the suction jet pump can be connected in a particularly simple manner if the pot has a groove into which a spring formed on the mixing tube engages.
  • the suction jet pump can convey over the upper edge into the baffle, wherein it is advantageously arranged in the region of the upper edge.
  • the previously provided suction in the bottom of the swirl pot is no longer necessary. This also eliminates the valve in the bottom region of the baffle pot, which closes the opening caused by the suction jet pump when the suction jet pump is not in operation.
  • the device according to the invention is particularly simple if the pot is formed by another component or integrated in this component.
  • the pot can be arranged on the swirl pot.
  • the pot is here either formed on the swirl pot or it is attached to the swirl pot.
  • the swirl pot used in this case is particularly simple, if a part of the soil is divided, so that this divided area forming the pot.
  • the swirl pot can have on its outer wall an Anformung, which forms the pot for the suction jet pump.
  • the advantage of these embodiments is that only the suction jet pump must be mounted.
  • Fig. 1 is a two chambers 2, 3 existing fuel tank 1 is shown.
  • a delivery unit 4 consisting of a swirl pot 5 and a fuel pump 6 arranged therein, fixed. Via a feed line 7, the funded by the fuel pump 6 fuel is passed to an internal combustion engine, not shown.
  • a pot 8 is attached on the outer wall of the swirl pot 5, a pot 8 is attached.
  • a suction jet pump 9 is arranged to the pot 8, that the mixing tube 10 projects into the pot.
  • fuel is supplied to the suction jet pump 9 from the fuel pump 6.
  • Another line 12 extends from the suction jet pump 9 into the other chamber 2. Via the line 12, fuel is conveyed from the chamber 2 directly into the swirl pot 5.
  • suction jet pump 9 consists of a propulsion jet nozzle 13, a mixing tube 14, the suction pipe 12 and a pot 8, wherein the pot 8 formed as a lid on Upper edge of the surge pot 5 is arranged.
  • the pot 8 can also be arranged as a separate component on a capless swirl pot 5.
  • a propulsion jet of the suction jet pump 9 is supplied.
  • a check valve in the propulsion jet line seals it against an idling.
  • the propulsion jet exits through the propulsion jet nozzle 13 and into the mixing tube 14.
  • the intake line 11 opens into the suction jet pump 9.
  • the suction jet pump 9 is arranged vertically with respect to the axial extension of the mixing tube 14. Furthermore, the suction jet pump 9 is arranged to the pot 8, that the outlet opening 15 of the mixing tube 14 is immersed in the pot 8.
  • the propellant jet passes from the propulsion jet nozzle 13 via the mixing tube 14 into the pot 8.
  • the pot 8 has a bottom 16 with a pocket 17. Upon impact of the jet on the pocket 17, the jet is swirled, thereby sealing the outlet opening 15 and it to a liquid closure in the mixing tube 14 and thus in the suction jet pump 9 comes. Due to the now complete closure of the mixing tube 14 of the propellant jet generates a much greater negative pressure, which in turn is sufficient to promote a larger amount of fuel over a relatively large distance by means of the suction pipe 11 into the pot 8.
  • the suction jet pump 9 with the pot 8 in FIG. 3a differs from the execution FIG. 2 only in the bottom region of the pot 8.
  • the bottom portion has integrally formed on the pot 8 ribs 18. These ribs 18 have the same effect as the pocket 17 in FIG. 2 , Through them, the jet is so swirled that it comes to the liquid closure of the outlet opening 15 of the mixing tube 14.
  • Both the bag 17 in FIG. 2 as well as the ribs are each formed only in the area of the mixing tube 14 and not over the entire bottom area.
  • FIG. 3b shows FIG. 3b a pot 8 having a funnel-shaped bottom surface 19 which extends over the entire bottom region.
  • suction jet pump 9 is connected to the pot 8 via a plug connection.
  • a spring 20 is formed, while the inner wall of the pot 8 has a groove 21 at one point.
  • the spring 20 is inserted into the groove 21.
  • the suction jet pump 9 is positioned to the pot 8.
  • Fig. 5 shows a further embodiment of the attachments of the suction jet pump 9 on the pot 8.
  • locking elements in the form of locking hooks 22 are formed in the region of the outlet opening, which cooperate with correspondingly formed locking points 23 which are integrally formed on the pot 8. It is also conceivable to provide the latching hooks 22 on the pot 8, while the mixing tube 14 has the necessary latching points 23.
  • the pot 8 is not a separate component, but part of the baffle 5 of the conveyor unit 4.
  • a wall 25 is formed, which forms the pot 8 together with the wall 26 of the baffle 5.
  • the mixing tube 14 protrudes with its outlet opening 16 into the pot 8.
  • the subsidized by the ejector 9 fuel flows from the pot 8 directly into the swirl pot 5. From there, the fuel is conveyed from the fuel pump, not shown, to the engine.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Jet Pumps And Other Pumps (AREA)

Description

Gegenstand der Erfindung ist eine Saugstrahlpumpe mit einer Treibstrahldüse, einem Mischrohr, einer Ansaugöffnung, elner daran angeschlossenen Saugleitung und einem Topf, in dem zumindest ein Teil des Mischrohres angeordnet ist. Die Saugstrahlpumpe dient zum Fördern von Kraftstoff innerhalb eines Kraftstoffbehälters oder aus einem Kraftstoffbehälter in einem Schwalltopf, der innerhalb des Kraftstoffbehälters angeordnet ist.The invention relates to a suction jet pump with a Treibstrahldüse, a mixing tube, a suction port, a suction line connected thereto and a pot in which at least a portion of the mixing tube is arranged. The suction jet pump serves to convey fuel within a fuel tank or from a fuel tank in a surge pot disposed within the fuel tank.

Es ist bekannt, dass Kraftstoffbehälter vielfältige Formen aufweisen. Mit der Anpassung des Kraftstoffbehälters an das Kraftfahrzeug unter Nutzung des vorhandenen Bauraumes entstehen Kraftstoffbehälter, die in mehrere Kammern unterteilt sind.It is known that fuel tanks have various shapes. With the adaptation of the fuel tank to the motor vehicle using the available space created fuel tank, which are divided into several chambers.

Diese Kammern sind größtenteils mit einem Sattel verbunden. Bei derartigen Kraftstoffbehältern tritt das Problem auf, dass der Kraftstoff bei niedrigem Füllstand aus der einen Kammer nicht mehr über den Sattel in die andere Kammer gelangen kann. Da üblicherweise nur eine Fördereinheit in einem Kraftstoffbehälter angeordnet ist, kann der in einer anderen Kammer befindliche Kraftstoff die Fördereinheit nicht erreichen. In diesen Fällen werden Saugstrahlpumpen eingesetzt, um den in anderen Bereichen des Kraftbehälters vorhandene Kraftstoff der Fördereinheit zuzuführen oder den Kraftstoff zumindest in die Kammer oder den Bereich, in dem sich die Fördereinheit befindet, zu fördern.These chambers are mostly connected to a saddle. In such fuel tanks, the problem arises that the fuel at low level from one chamber can not get over the saddle in the other chamber. Since usually only one delivery unit is arranged in a fuel tank, the fuel located in another chamber can not reach the delivery unit. In these cases, suction jet pumps are used to supply the fuel present in other areas of the power tank to the delivery unit or to deliver the fuel at least into the chamber or the area in which the delivery unit is located.

Herkömmliche Saugstrahlpumpen werden am Boden der Kammern oder der Bereiche des Kraftstoffbehälters angeordnet, aus denen der Kraftstoff zur Fördereinheit gefördert werden soll. Mit der Anordnung der Ansaugöffnung der Saugstrahlpumpe am Boden des Kraftstoffbehälters befindet sich die Saugstrahlpumpe immer im Kraftstoff und ist somit immer betriebsbereit. Derartige Saugstrahlpumpen zeichnen sich durch einen guten Wirkungsgrad aus. Der Förderfaktor, das heißt, das Verhältnis von Summenstrahl zu Treibstrahl, liegt mindestens bei 7. Nachteilig hierbei ist, dass mit der Treibmittelleitung zur Saugstrahlpumpe und der Summenleitung von der Saugstrahlpumpe zwei Leitungen erforderlich sind, die im Kraftstoffbehälter verlegt und befestigt werden müssen.Conventional suction jet pumps are arranged at the bottom of the chambers or the areas of the fuel tank, from which the fuel is to be conveyed to the delivery unit. With the arrangement of the suction of the suction jet pump at the bottom of the fuel tank, the suction jet pump is always in the fuel and is therefore always ready for use. Such suction jet pumps are characterized by a good efficiency out. The funding factor, that is, the ratio of sum beam to propellant jet, is at least 7. The disadvantage here is that with the fuel line to the suction jet pump and the sum of the suction jet pump line two lines are required, which must be installed and fixed in the fuel tank.

Weiterhin ist bekannt, saugende Saugstrahlpumpen zu verwenden, die im Bereich der Fördereinheit angeordnet sind. Von der Saugstrahlpumpe führt eine Saugleitung in dem Bereich, aus dem der Kraftstoff gefördert werden soll. Zur Erzeugung des notwendigen Unterdrucks in der Saugleitung besitzt die Saugstrahlpumpe eine spezielle Treibstrahldüse. Die Austrittsöffnung der Treibstrahldüse ist als Schlitz ausgeführt. In Folge des Schlitzes wird der Treibstrahl nach dem Austreten aus der Treibstrahldüse aufgefächert. Der aufgefächerte Treibstrahl verschließt das Mischrohr, wodurch der notwendige Unterdruck erzeugt wird, um über die relativ lange Ansaugleitung den Kraftstoff ansaugen zu können. Dadurch ist nur eine statt wie bisher zwei im Kraftstoffbehälter zu verlegende und zu befestigende Leitungen notwendig. Nachteilig bei dieser Ausführungsform ist der niedrige Förderfaktor der saugenden Saugstrahlpumpe, der ungefähr bei 2 liegt. Dieser niedrige Förderfaktor ist bedingt durch das Auffächern des Treibstrahls nach dem Verlassen der Treibstrahldüse.Furthermore, it is known to use suction suction jet pumps, which are arranged in the region of the conveyor unit. From the suction jet pump leads a suction line in the area from which the fuel is to be conveyed. To generate the necessary negative pressure in the suction line, the suction jet pump has a special jet nozzle. The outlet opening of the propulsion jet nozzle is designed as a slot. As a result of the slot, the propulsion jet is fanned out after emerging from the propulsion jet nozzle. The fanned out propulsion jet closes the mixing tube, whereby the necessary negative pressure is generated in order to be able to suck in the fuel via the relatively long intake line. As a result, only one instead of two so far in the fuel tank to be laid and fastened lines necessary. A disadvantage of this embodiment is the low delivery factor of the suction suction jet pump, which is approximately at 2. This low conveying factor is due to the fanning of the propulsion jet after leaving the Treibstrahldüse.

Es ist weiter eine Saugstrahlpumpe bekannt, siehe z.B. WO 2004/018864 A , die mit dem Austrittsende des Mischrohres in einem Topf angeordnet ist, so dass das im Topf befindliche Fördermedium das Mischrohrende gegen die Atmosphäre abdichtet. Durch diesen Flüssigkeitsverschluß wird am Mischrohreintritt ein Unterdruck erzeugt werden, der zur Verbesserung der Saugleistung beiträgt. Es hat sich jedoch gezeigt, dass unter bestimmten Umständen die Saugleistung nicht erreicht wird, was darauf schließen lässt, dass der Flüssigkeitsverschluß des Mischrohraustritts nicht immer gewährleistet ist. Dies kann beispielsweise dadurch bedingt sein, dass eine zu geringe Menge der geförderten Flüssigkeit im Topf vorhanden ist.It is further known a suction jet pump, see for example WO 2004/018864 A , which is arranged with the outlet end of the mixing tube in a pot, so that the conveying medium located in the pot seals the mixing tube end against the atmosphere. Through this liquid closure, a negative pressure will be generated at the mixing tube inlet, which contributes to the improvement of the suction power. However, it has been found that under certain circumstances, the suction power is not achieved, which suggests that the liquid closure of the Mischrohraustritts is not always guaranteed. This can be caused, for example, by the fact that there is too little amount of the pumped liquid in the pot.

Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, eine saugende Saugstrahlpumpe mit einem verbesserten Förderfaktor zu schaffen, wobei die Saugleistung auch unter ungünstigen Umständen gewährleistet ist. Die Saugstrahlpumpe soll darüber hinaus einfach und kompakt aufgebaut und leicht zu montieren sein.The present invention is therefore based on the object to provide a suction suction jet pump with an improved delivery factor, the suction power is ensured even under unfavorable circumstances. The suction jet pump should also be simple and compact and easy to assemble.

Erfindungsgemäß wird die Aufgabe dadurch gelöst, dass der Boden des Topfes eine von einer Planfläche abweichende Gestalt besitzt.According to the invention the object is achieved in that the bottom of the pot has a deviating from a plane surface shape.

Durch diese Gestaltung des Bodens des Topfes wird das mit hoher Geschwindigkeit aus dem Mischrohr austretende geförderte Medium aufgespalten, bzw. verwirbelt. Diese Verwirbelung des Mediums gewährleistet einen dauerhaften und zuverlässigen Flüssigkeitsverschluß der in den Topf hineinragenden Auslassöffnung des Mischrohres, so dass sich in der Saugstrahlpumpe ein ausreichender Unterdruck ausbilden kann, der das Ansaugen des zu fördernden Mediums über eine weite Strecke ermöglicht.As a result of this design of the bottom of the pot, the conveyed medium emerging at high speed from the mixing tube is split or swirled. This turbulence of the medium ensures a permanent and reliable liquid closure of the outlet opening of the mixing tube projecting into the pot, so that a sufficient negative pressure can form in the suction jet pump, which makes it possible to suck in the medium to be conveyed over a long distance.

In einer vorteilhaften Ausgestaltung ist die von einer Planfläche abweichende Gestalt eine Vertiefung in Form einer Mulde oder Tasche im Bodenbereich des Topfes. Eine derartige Ausbildung ist mit geringem Aufwand herstellbar und daher besonders kostengünstig.In an advantageous embodiment, the deviating from a plane surface shape is a depression in the form of a trough or pocket in the bottom region of the pot. Such a design can be produced with little effort and therefore particularly cost.

Eine ebenso günstig herzustellende Gestaltung des Topfbodens ist mit am Topfboden angeordneten Rippen gegeben. Die Rippen können dabei einteilig am Topfboden angeformt sein, wenn der Topf mittels Spritzgießens hergestellt wird.An equally inexpensive to manufacture design of the pot bottom is given with arranged on the bottom of the pot ribs. The ribs can be integrally formed on the bottom of the pot, when the pot is made by injection molding.

Die Kosten für die Erzeugung der Vertiefung oder der Rippen lassen sich verringern, wenn diese im Bereich der Auslassöffnung des Mischrohres angeordnet sind.The costs for the production of the recess or the ribs can be reduced if they are arranged in the region of the outlet opening of the mixing tube.

In einer anderen Ausgestaltung ist die von einer Planfläche abweichende Gestalt eine trichterförmige Bodenfläche, die sich über den gesamten Bodenbereich erstreckt.In another embodiment, the deviating from a plane surface shape is a funnel-shaped bottom surface which extends over the entire bottom portion.

Der Topf ist in einer weiteren Ausgestaltung mit der Saugstrahlpumpe verbunden. Der Topf kann einteilig mit der Saugstrahlpumpe, vorzugsweise am Mischrohr, angeformt sein. Die Fertigung der erfindungsgemäßen Saugstrahlpumpe gestaltet sich jedoch besonders einfach, wenn der Topf mittels einer Rast- oder Steckverbindung mit der Saugstrahlpumpe verbunden ist. Auf diese Weise bildet der Topf mit der Saugstrahlpumpe eine Einheit. Die Saugstrahlpumpe ist dadurch an beliebigen Orten einsetzbar.The pot is connected in a further embodiment with the suction jet pump. The pot can be integrally formed with the suction jet pump, preferably on the mixing tube. However, the production of the suction jet pump according to the invention is particularly simple if the pot is connected by means of a latching or plug connection with the suction jet pump. In this way, the pot forms a unit with the suction jet pump. The suction jet pump can thereby be used at any location.

Die Verbindung von Topf und Saugstrahlpumpe gestaltet sich vorteilhaft, wenn sowohl an der Saugstrahlpumpe als auch am Topf Rast- oder Steckelemente, die ineinander greifen, vorhanden sind. Besonders einfach lassen sich der Topf und die Saugstrahlpumpe verbinden, wenn der Topf eine Nut aufweist, in die eine am Mischrohr angeformte Feder eingreift.The connection of pot and suction jet pump designed advantageous if both the suction jet pump and the pot latching or plug-in elements, which engage with each other, are present. The pot and the suction jet pump can be connected in a particularly simple manner if the pot has a groove into which a spring formed on the mixing tube engages.

Wird die Saugstrahlpumpe zur Befüllung des Schwalltopfes verwendet, kann die Saugstrahlpumpe über den oberen Rand in den Schwalltopf fördern, wobei sie vorteilhafterweise im Bereich des oberen Randes angeordnet ist. Die bisher vorgesehene Ansaugöffnung im Boden des Schwalltopfes ist nicht mehr erforderlich. Damit entfällt ebenso das Ventil im Bodenbereich des Schwalltopfes, welches die durch die Saugstrahlpumpe verursachte Öffnung verschließt, wenn die Saugstrahlpumpe nicht in Betrieb ist.If the suction jet pump is used for filling the baffle, the suction jet pump can convey over the upper edge into the baffle, wherein it is advantageously arranged in the region of the upper edge. The previously provided suction in the bottom of the swirl pot is no longer necessary. This also eliminates the valve in the bottom region of the baffle pot, which closes the opening caused by the suction jet pump when the suction jet pump is not in operation.

Die erfindungsgemäße Vorrichtung gestaltet sich besonders einfach, wenn der Topf von einem anderen Bauteil gebildet oder in dieses Bauteil integriert ist. So kann der Topf am Schwalltopf angeordnet sein. Der Topf ist hierbei entweder an dem Schwalltopf angeformt oder er wird am Schwalltopf befestigt. Der hierbei verwendete Schwalltopf ist besonders einfach gestaltet, wenn ein Teil des Bodens abgeteilt ist, so dass dieser abgeteilte Bereich den Topf bildet. Ebenso gut kann der Schwalltopf an seiner Außenwandung eine Anformung aufweisen, die den Topf für die Saugstrahlpumpe bildet. Der Vorteil dieser Ausgestaltungen besteht darin, dass lediglich die Saugstrahlpumpe montiert werden muß.The device according to the invention is particularly simple if the pot is formed by another component or integrated in this component. Thus, the pot can be arranged on the swirl pot. The pot is here either formed on the swirl pot or it is attached to the swirl pot. The swirl pot used in this case is particularly simple, if a part of the soil is divided, so that this divided area forming the pot. Just as well, the swirl pot can have on its outer wall an Anformung, which forms the pot for the suction jet pump. The advantage of these embodiments is that only the suction jet pump must be mounted.

An mehreren Ausführungsbeispielen wird die Erfindung näher erläutert. Dabei zeigen die Figuren in

Fig. 1:
eine schematische Anordnung der Saugstrahlpumpe in einem Kraftstoffbehälter,
Fig. 2:
die vergrößerte Darstellung der Saugstrahlpumpe gemäß Figur 1,
Fig. 3 a,b:
die Saugstrahlpumpe gemäß Figur 2,
Fig. 4, 5:
verschiedene Befestigung der Saugstrahlpumpe zum Topf und
Fig. 6:
die Anordnung der Saugstrahlpumpe an einem Schwalltopf.
In several embodiments, the invention will be explained in more detail. The figures show in
Fig. 1:
a schematic arrangement of the ejector in a fuel tank,
Fig. 2:
the enlarged view of the suction jet pump according to FIG. 1 .
3 a, b:
the suction jet pump according to FIG. 2 .
4, 5:
various attachment of the suction jet pump to the pot and
Fig. 6:
the arrangement of the suction jet pump on a swirl pot.

In Fig. 1 ist ein aus zwei Kammern 2, 3 bestehender Kraftstoffbehälter 1 dargestellt. In dem Kraftstoffbehälter 1 ist eine Fördereinheit 4, bestehend aus einem Schwalltopf 5 und einer darin angeordneten Kraftstoffpumpe 6, befestigt. Über eine Vorlaufleitung 7 wird der von der Kraftstoffpumpe 6 geförderte Kraftstoff zu einer nicht dargestellten Brennkraftmaschine geleitet. An der Außenwand des Schwalltopfes 5 ist ein Topf 8 befestigt. Eine Saugstrahlpumpe 9 ist derart zu dem Topf 8 angeordnet, dass deren Mischrohr 10 in dem Topf hineinragt. Über eine Leitung 11 wird aus der Kraftstoffpumpe 6 Kraftstoff der Saugstrahlpumpe 9 zugeführt. Eine weitere Leitung 12 erstreckt sich von der Saugstrahlpumpe 9 in die andere Kammer 2. Über die Leitung 12 wird Kraftstoff aus der Kammer 2 direkt in den Schwalltopf 5 gefördert.In Fig. 1 is a two chambers 2, 3 existing fuel tank 1 is shown. In the fuel tank 1, a delivery unit 4, consisting of a swirl pot 5 and a fuel pump 6 arranged therein, fixed. Via a feed line 7, the funded by the fuel pump 6 fuel is passed to an internal combustion engine, not shown. On the outer wall of the swirl pot 5, a pot 8 is attached. A suction jet pump 9 is arranged to the pot 8, that the mixing tube 10 projects into the pot. Via a line 11, fuel is supplied to the suction jet pump 9 from the fuel pump 6. Another line 12 extends from the suction jet pump 9 into the other chamber 2. Via the line 12, fuel is conveyed from the chamber 2 directly into the swirl pot 5.

Die in der Figur 2 dargestellte Saugstrahlpumpe 9 besteht aus einer Treibstrahldüse 13, einem Mischrohr 14, der Ansaugleitung 12 und einem Topf 8, wobei der Topf 8 als Deckel ausgebildet am oberen Rand des Schwalltopfes 5 angeordnet ist. Dabei kann der Topf 8 auch als separates Bauteil an einem deckellosen Schwalltopf 5 angeordnet sein. Mittels der Treibstrahlleitung 11 wird ein Treibstrahl der Saugstrahlpumpe 9 zugeführt. Ein Rückschlagventil in der Treibstrahlleitung dichtet diese gegen ein Leerlaufen ab. Der Treibstrahl tritt durch die Treibstrahldüse 13 aus und in das Mischrohr 14 ein. Im Bereich der Treibstrahldüse 13 mündet die Ansaugleitung 11 in die Saugstrahlpumpe 9. Die Saugstrahlpumpe 9 ist bezüglich der axialen Erstreckung des Mischrohres 14 senkrecht angeordnet. Weiterhin ist die Saugstrahlpumpe 9 derart zu dem Topf 8 angeordnet, dass die Auslassöffnung 15 des Mischrohres 14 in den Topf 8 eintaucht. Der Treibstrahl gelangt aus der Treibstrahldüse 13 über das Mischrohr 14 in den Topf 8. Der Topf 8 besitzt einen Boden 16 mit einer Tasche 17. Beim Auftreffen des Strahls auf die Tasche 17, wird der Strahl verwirbelt, wodurch er die Auslassöffnung 15 abdichtet und es zu einem Flüssigkeitsverschluss im Mischrohr 14 und damit in der Saugstrahlpumpe 9 kommt. Aufgrund des nunmehr vollständigen Verschlusses des Mischrohres 14 erzeugt der Treibstrahl einen wesentlich größeren Unterdruck, der wiederum ausreichend ist, um eine größere Menge an Kraftstoff über eine relativ große Entfernung mittels der Ansaugleitung 11 in den Topf 8 zu fördern.The in the FIG. 2 shown suction jet pump 9 consists of a propulsion jet nozzle 13, a mixing tube 14, the suction pipe 12 and a pot 8, wherein the pot 8 formed as a lid on Upper edge of the surge pot 5 is arranged. In this case, the pot 8 can also be arranged as a separate component on a capless swirl pot 5. By means of the propulsion jet line 11, a propulsion jet of the suction jet pump 9 is supplied. A check valve in the propulsion jet line seals it against an idling. The propulsion jet exits through the propulsion jet nozzle 13 and into the mixing tube 14. In the area of the propulsion jet nozzle 13, the intake line 11 opens into the suction jet pump 9. The suction jet pump 9 is arranged vertically with respect to the axial extension of the mixing tube 14. Furthermore, the suction jet pump 9 is arranged to the pot 8, that the outlet opening 15 of the mixing tube 14 is immersed in the pot 8. The propellant jet passes from the propulsion jet nozzle 13 via the mixing tube 14 into the pot 8. The pot 8 has a bottom 16 with a pocket 17. Upon impact of the jet on the pocket 17, the jet is swirled, thereby sealing the outlet opening 15 and it to a liquid closure in the mixing tube 14 and thus in the suction jet pump 9 comes. Due to the now complete closure of the mixing tube 14 of the propellant jet generates a much greater negative pressure, which in turn is sufficient to promote a larger amount of fuel over a relatively large distance by means of the suction pipe 11 into the pot 8.

Die Saugstrahlpumpe 9 mit dem Topf 8 in Figur 3a unterscheidet sich von der Ausführung nach Figur 2 lediglich im Bodenbereich des Topfes 8. Der Bodenbereich weist einteilig am Topf 8 angeformte Rippen 18 auf. Diese Rippen 18 haben denselben Effekt wie die Tasche 17 in Figur 2. Durch sie wird der Strahl derart verwirbelt, dass es zum Flüssigkeitsverschluß der Auslassöffnung 15 des Mischrohres 14 kommt. Sowohl die Tasche 17 in Figur 2 als auch die Rippen sind jeweils nur im Bereich des Mischrohres 14 und nicht über den gesamten Bodenbereich ausgebildet. Im Gegensatz dazu zeigt Figur 3b einen Topf 8 mit einer trichterförmigen Bodenfläche 19, die sich über den gesamten Bodenbereich erstreckt.The suction jet pump 9 with the pot 8 in FIG. 3a differs from the execution FIG. 2 only in the bottom region of the pot 8. The bottom portion has integrally formed on the pot 8 ribs 18. These ribs 18 have the same effect as the pocket 17 in FIG FIG. 2 , Through them, the jet is so swirled that it comes to the liquid closure of the outlet opening 15 of the mixing tube 14. Both the bag 17 in FIG. 2 as well as the ribs are each formed only in the area of the mixing tube 14 and not over the entire bottom area. In contrast, shows FIG. 3b a pot 8 having a funnel-shaped bottom surface 19 which extends over the entire bottom region.

Die in Fig. 4 gezeigte Saugstrahlpumpe 9 ist mit dem Topf 8 über eine Steckverbindung verbunden. An der Außenseite des Mischrohres 14 ist eine Feder 20 angeformt, während die Innenwandung des Topfes 8 an einer Stelle eine Nut 21 aufweist. Zum Verbinden von Topf 8 und Saugstrahlpumpe 9 wird die Feder 20 in die Nut 21 eingeschoben. Mit Erreichen der unteren Nutbegrenzung ist die Saugstrahlpumpe 9 zum Topf 8 positioniert.In the Fig. 4 shown suction jet pump 9 is connected to the pot 8 via a plug connection. On the outside of the mixing tube 14, a spring 20 is formed, while the inner wall of the pot 8 has a groove 21 at one point. To connect pot 8 and suction jet pump 9, the spring 20 is inserted into the groove 21. Upon reaching the lower Nutbegrenzung the suction jet pump 9 is positioned to the pot 8.

Fig. 5 zeigt eine weitere Ausgestaltung für die Befestigungen der Saugstrahlpumpe 9 am Topf 8. Am Mischrohr 14 sind im Bereich der Auslassöffnung 15 Rastelemente in Form von Rasthaken 22 angeformt, die mit entsprechend ausgebildeten Raststellen 23, die am Topf 8 angeformt sind, zusammenwirken. Es ist auch denkbar, die Rasthaken 22 am Topf 8 vorzusehen, während das Mischrohr 14 die notwendigen Raststellen 23 besitzen. Fig. 5 shows a further embodiment of the attachments of the suction jet pump 9 on the pot 8. At the mixing tube 14 15 locking elements in the form of locking hooks 22 are formed in the region of the outlet opening, which cooperate with correspondingly formed locking points 23 which are integrally formed on the pot 8. It is also conceivable to provide the latching hooks 22 on the pot 8, while the mixing tube 14 has the necessary latching points 23.

In der in Fig. 6 gezeigten Ausgestaltung ist der Topf 8 kein separates Bauteil, sondern Bestandteil des Schwalltopfes 5 der Fördereinheit 4. Am Boden 24 des Schwalltopfes 5 ist eine Wand 25 angeformt, die zusammen mit der Wandung 26 des Schwalltopfes 5 den Topf 8 bildet. Das Mischrohr 14 ragt mit seiner Auslassöffnung 16 in den Topf 8 hinein. Der von der Saugstrahlpumpe 9 geförderte Kraftstoff strömt aus dem Topf 8 direkt in den Schwalltopf 5. Von dort wird der Kraftstoff von der nicht dargestellten Kraftstoffpumpe zur Brennkraftmaschine gefördert.In the in Fig. 6 The pot 8 is not a separate component, but part of the baffle 5 of the conveyor unit 4. At the bottom 24 of the baffle 5, a wall 25 is formed, which forms the pot 8 together with the wall 26 of the baffle 5. The mixing tube 14 protrudes with its outlet opening 16 into the pot 8. The subsidized by the ejector 9 fuel flows from the pot 8 directly into the swirl pot 5. From there, the fuel is conveyed from the fuel pump, not shown, to the engine.

Claims (10)

  1. Jet suction pump, comprising a propulsion jet nozzle with a round nozzle opening, a mixing pipe, a suction opening, a suction line arranged thereon and a pot, in which at least part of the mixing pipe is arranged, characterized in that the bottom (16) of the pot (8) has a shape (17-19) differing from a planar surface for swirling the delivered medium emerging from the mixing pipe (14).
  2. Jet suction pump according to Claim 1, characterized in that the shape differing from a planar surface is a depression (17).
  3. Jet suction pump according to Claim 1, characterized in that the shape differing from a planar surface is ribs (18).
  4. Jet suction pump according to Claim 2 or 3, characterized in that the depression (17) or the ribs (18) of the bottom (16) are arranged in the region of the outlet opening (15) of the mixing pipe (14).
  5. Jet suction pump according to Claim 1, characterized in that the shape differing from a planar surface is a funnel-like bottom surface (19).
  6. Jet suction pump according to at least one of the preceding claims, characterized in that the pot (8) is connected to the jet suction pump (9).
  7. Jet suction pump according to Claim 6, characterized in that the pot (8) is connected to the jet suction pump (9) by means of a latching or plug-in connection.
  8. Jet suction pump according to Claim 6, characterized in that the pot (8) is integrally formed on the jet suction pump (9).
  9. Jet suction pump as claimed in Claim 8, characterized in that the pot (8) is welded or adhesively bonded to the jet suction pump (9).
  10. Jet suction pump as claimed in at least one of the preceding claims, characterized in that the pot (8) is formed on a baffle pot (5) or in a region of the baffle pot (5).
EP06704618.5A 2005-03-24 2006-01-10 Jet suction pump Ceased EP1861625B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200510014431 DE102005014431B3 (en) 2005-03-24 2005-03-24 Ejector pump for use in fuel tank, has mixer tube whose one portion is arranged in pot, where base of pot includes recess, which deviates from flat surface such that the medium conveyed by tube with high velocity is swirled
PCT/EP2006/050111 WO2006100129A1 (en) 2005-03-24 2006-01-10 Jet suction pump

Publications (2)

Publication Number Publication Date
EP1861625A1 EP1861625A1 (en) 2007-12-05
EP1861625B1 true EP1861625B1 (en) 2015-10-21

Family

ID=35929782

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06704618.5A Ceased EP1861625B1 (en) 2005-03-24 2006-01-10 Jet suction pump

Country Status (5)

Country Link
US (1) US8408880B2 (en)
EP (1) EP1861625B1 (en)
CN (1) CN101147004B (en)
DE (1) DE102005014431B3 (en)
WO (1) WO2006100129A1 (en)

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Also Published As

Publication number Publication date
US20080193300A1 (en) 2008-08-14
DE102005014431B3 (en) 2006-08-03
CN101147004A (en) 2008-03-19
CN101147004B (en) 2011-07-06
EP1861625A1 (en) 2007-12-05
US8408880B2 (en) 2013-04-02
WO2006100129A1 (en) 2006-09-28

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