EP1642019A1 - Device for supplying fuel from a reservoir to an internal combustion engine - Google Patents

Device for supplying fuel from a reservoir to an internal combustion engine

Info

Publication number
EP1642019A1
EP1642019A1 EP04731127A EP04731127A EP1642019A1 EP 1642019 A1 EP1642019 A1 EP 1642019A1 EP 04731127 A EP04731127 A EP 04731127A EP 04731127 A EP04731127 A EP 04731127A EP 1642019 A1 EP1642019 A1 EP 1642019A1
Authority
EP
European Patent Office
Prior art keywords
filter
throttle
fuel
drive line
opening
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
EP04731127A
Other languages
German (de)
French (fr)
Other versions
EP1642019B1 (en
Inventor
Hans-Peter Braun
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1642019A1 publication Critical patent/EP1642019A1/en
Application granted granted Critical
Publication of EP1642019B1 publication Critical patent/EP1642019B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04FPUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/44Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
    • F04F5/46Arrangements of nozzles
    • F04F5/466Arrangements of nozzles with a plurality of nozzles arranged in parallel
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/02Feeding by means of suction apparatus, e.g. by air flow through carburettors
    • F02M37/025Feeding by means of a liquid fuel-driven jet pump

Definitions

  • the invention relates to a device according to the preamble of the main claim.
  • DE 195 04 217 AI shows a device for conveying fuel with a feed-fed drive line, which has a throttle to limit the flow. Dirt particles from the fuel and the device can clog the throttle and cause the vehicle to stop.
  • the device according to the invention with the characterizing features of the main claim has the advantage that the manufacturing costs are reduced and the assembly of the prefilter and the throttle in the drive line is simplified by the throttle being integrally connected to a prefilter.
  • Advantageous further developments and improvements of the device specified in the main claim are possible through the measures listed in the subclaims.
  • the throttle with the prefilter is manufactured by means of injection molding, since this is a particularly cost-effective manufacturing process.
  • the throttle has a throttle opening with a surface area, which results in a circular design from a diameter of 0.6 to 1 millimeter, and the prefilter filter openings, the surface area of a filter opening being smaller than the surface area of the throttle opening. This ensures that all dirt particles that could clog the throttle opening are filtered out upstream of the throttle opening. It is also advantageous if the prefilter is designed as a filter bowl with a filter base and a peripheral wall, filter openings being provided in the filter base and / or in the peripheral wall, since in this way the largest possible filter area is achieved which is not susceptible to clogging.
  • the throttle is designed as a cover in which a throttle opening is provided, since this represents a particularly simple embodiment variant.
  • the filter bowl and the cover are connected to one another via connecting webs, since the connecting webs create a sufficient distance between the prefilter and the throttle, so that both the fuel flowing over the filter base and the fuel flowing over the peripheral wall can reach the throttle opening in a streamlined manner ,
  • FIG.l shows in simplified form a device according to the invention for conveying fuel
  • Fig.2 in section a throttle with integrated pre-filter
  • Fig. 3 is a three-dimensional view of the exemplary embodiment according to Fig.2.
  • Fig.l shows an inventive device for requesting fuel from a reservoir to an internal combustion engine of a motor vehicle.
  • the device according to the invention has one in one
  • Reservoir 1 arranged fuel request module 2.
  • a fuel 3 is stored in the storage container 1, for example.
  • the fuel delivery module 2 consists of, for example, a pot-shaped storage tank 4, in which a delivery pump 7 is arranged, which draws fuel from the storage tank 4, for example via a filter 8 and a suction line 9, and supplies it to an internal combustion engine 11 via a pressure line 10 at increased pressure.
  • the storage tank 4 stores a sufficient amount of fuel so that a fuel supply to the internal combustion engine 11 is ensured by the delivery pump 7, even if, for example due to cornering and the resulting sloshing movements of the fuel in the storage tank 1, no fuel is required in the storage tank 4.
  • the storage container 4 is arranged with its pot bottom 5 near a tank bottom 6 of the storage container 1.
  • the feed pump 7 is, for example, a flow pump that is driven electrically by an actuator, for example an armature of an electric motor.
  • the filter 8 protects the device downstream of the filter 8 from coarse dirt particles contained in the fuel.
  • a check valve 14 is arranged in the pressure line 10, for example, and a main filter 15 downstream of the check valve 14, which filters out the fine dirt particles contained in the fuel.
  • the check valve 14 prevents fuel when the feed pump 7 is switched off from the pressure line 10 from downstream of the check valve 14 via the pressure line upstream of the check valve 14, the feed pump 1, the suction line 9 and the filter 8 back into the storage container 4. In this way, the pressure built up by the feed pump 7 in the pressure line 10 is maintained for a certain time even when the feed pump 7 is switched off.
  • a branch line 16 is provided on the pressure line 10 and opens into the storage tank 4.
  • the branch line 16 has a pressure control valve 17.
  • the pressure control valve 17 opens and allows fuel from the pressure line 10 to flow into the storage tank 4 via the branch line 16. In this way, the pressure in the pressure line 10 drops again below the predetermined pressure, so that the pressure control valve 17 closes and no more fuel can flow out into the storage tank 4 via the branch line 16.
  • the pressure in the pressure line 10 downstream of the check valve 14 is regulated to a constant value by means of the pressure control valve 17. So that the storage tank 4 is not sucked empty by the feed pump 7, fuel must continuously flow from the storage tank 1 into the storage tank 4.
  • at least one suction jet pump 20 is provided on the storage tank 4, which pumps fuel from the storage tank 1 into the storage tank 4.
  • a suction jet pump is known, for example, from DE 198 56 298 CI, the content of which is expressly intended to be part of the disclosure of this application.
  • a drive line 21 runs to a nozzle 22 of the suction jet pump 20.
  • a pre-filter 23 is arranged in the drive line 21 and a throttle 24 is arranged downstream of the pre-filter 23.
  • the pre-filter 23 protects the throttle 24 from dirt particles that could clog the throttle 24.
  • the throttle 24 limits the volume flow flowing through the drive line 21.
  • the throttle 24 is connected in one piece to the prefilter 23. The pre-filter 23 is thereby integrated in the throttle 24.
  • the nozzle 22 is arranged on an end of the drive line 21 facing the storage container 1, for example clamped, clipped, glued or welded to or in the drive line 21.
  • the nozzle 22 has a nozzle opening 28 opening into a suction space 27.
  • the suction space 27 is formed by an indentation 25 in the pot base 5 and connected to the storage container 1 via a suction opening 19.
  • the suction space 27 is delimited by the pot base 5, the nozzle 22, the suction opening 19 and a mixing channel 29 provided downstream of the suction space 27 and starting from the suction space 27 for example runs horizontally in the direction of the tank bottom 6.
  • a suction jet pump with a horizontally running mixing channel is also referred to as a lying suction jet pump, a suction jet pump with a vertically running mixing channel, on the other hand, is called a standing suction jet pump.
  • the mixing channel 29 opens into the storage tank 4 at an end of the mixing channel 29 facing the storage tank 4 via a further check valve, for example an umbrella valve 30, which closes in the direction of the storage tank 1.
  • the mixing channel 29 has, for example, a diffuser section 31 at the end facing the storage tank 4 in which the mixing channel 29 widens in the direction of flow, for example transversely to the plane of the drawing.
  • the throttle 24 arranged in the drive line 21 is designed, for example, in a cover-shaped manner as a cover 40, a throttle opening 41 penetrating the cover 40 being provided in the cover 40.
  • the throttle opening 41 is arranged, for example, centrally to the drive line 21 and has a diameter of 0.6 to 1 millimeter, for example, in the case of a circular design, but can also expressly have a different diameter and other Foxmen with different surface areas.
  • the area of the throttle opening 41 is selected, for example, so that it corresponds to the area of a circular configuration with a diameter of 0.6 to 1 millimeter.
  • the cover 40 has an annular collar 44 on its circumference, which engages in the direction of the nozzle 22.
  • the pre-filter 23 is arranged, which is for example cup-shaped as a filter bowl 43.
  • the filter bowl 43 consists of a filter base 46 and a peripheral wall 47, the filter base 46 and the peripheral wall 47 enclosing a filter space 48 which is open on the side facing away from the filter base 46 and is in flow connection with the drive line 21.
  • the filter base 46 and the peripheral wall 47 are, for example, flat, but can also be curved.
  • the filter base 46 and the cover 40 lie opposite one another, the filter base 46, for example, parallel to the cover 40 or: also obliquely is arranged to cover 40.
  • the filter bowl 43 is, for example, square, triangular, rectangular, polygonal, circular or oval and tapers, for example, in the direction of flow.
  • Filter openings 49 of any shape are provided in the filter base 46 and / or in the peripheral wall 47 of the filter bowl 43, a filter opening 49 each having a smaller area than the throttle opening 41. This ensures that all dirt particles that could clog the throttle opening 41 are filtered out in the prefilter 23 upstream of the throttle opening 41.
  • the filter openings 49 have a diameter of 0.5 millimeters, for example, with a circular design. However, circular filter openings 49 with a diameter other than 0.5 millimeters are also expressly possible.
  • a large filter area is formed by the filter openings 49 provided on the filter bowl 43, so that the pre-filter 23 is insensitive to clogging. If dirt particles get stuck in or on a filter opening 49 and thereby become blocked, there are still many more
  • a disk-shaped shoulder 51 is provided, which reaches radially outwards up to a drive line wall 53 of the drive line 21.
  • the prefilter 23 lies with the
  • the peripheral wall 47 is radially spaced from the drive line wall 53.
  • the cover 40 of the throttle 24 and the pot-shaped pre-filter 23 are connected to one another in one piece via, for example, two connecting webs 54.
  • the Connecting webs 54 extend vertically or inclined upwards from the top 42 of the cover 40 and are connected, for example, to the peripheral wall 47 and / or the filter base 46.
  • the connecting webs 54 By means of the connecting webs 54, the cover 40 with the throttle opening 41 is spaced apart from the filter bowl 43.
  • the shoulder 51, the upper side 42 of the cover 40, the drive line wall 53 and the peripheral wall 47 enclose a storage space 55.
  • the filter space 48 and the storage space 55 are fluidly connected to one another via the filter openings 49.
  • the fuel of the drive line 21 upstream of the pre-filter 23 flows into the filter space 48, via the filter openings 49 in the filter base 46 and / or in the peripheral wall 47 into the storage space 55.
  • the fuel flows into the storage space 55
  • the fuel flowing through the filter openings 49 of the peripheral wall 47 has a further flow path to the throttle opening 41 than the fuel flowing through the filter openings 49 of the filter base 46. So that the fuel flowing through the filter openings 49 of the peripheral wall 47 reaches the throttle opening 41 in a streamlined manner, the distance between the filter base 46 and the cover 40 must be chosen to be sufficiently large.
  • the flow is constricted upstream of the throttle opening 41 and arrives in the form of a jet through the throttle opening 41 in the direction of the nozzle 22.
  • the throttle opening 41 of the throttle 24 has the function of a flow limiter.
  • the volume flow flowing through the drive line 21 and through the throttle opening 41 is set by appropriately designing the diameter of the throttle opening 41.
  • the throttle 24 with the prefilter 23 is produced, for example, by means of injection molding.
  • the throttle 24 can also be assembled in one piece with the prefilter 23 by means of gluing or welding.
  • the one-piece design of the throttle 24 and the prefilter 23 reduces the manufacturing costs of the two parts and simplifies assembly. Dirt particles from the fuel of the drive line 21 and dirt particles originating from the manufacturing process of the device are filtered out by the pre-filter 23 upstream of the throttle 24, so that the throttle 24 does not become blocked.
  • a blocked throttle 24 would result in no more fuel being pumped from the suction jet pump 20 into the storage tank 4, so that the fill level in the storage tank 4 would drop after a certain time and the feed pump 7 would not be supplied with sufficient fuel. Particularly if the fill level in the storage container 1 is low, this would result in the vehicle stopping.
  • the throttle 24 with an integrated pre-filter 23 is provided as a separate component, in particular made of plastic, in the drive line 21.
  • the nozzle opening 41 can be manufactured with high accuracy and without disruptive burrs. Constructive changes to adapt the volume flow flowing via the drive line 21 are therefore only required on the separate throttle 24 and not on the fuel demand module 2 itself.
  • the throttle opening 41 of the throttle 24 and the nozzle opening 28 of the nozzle 22 can be chosen to be larger than in the case of a single-stage pressure drop only at the nozzle 22 without a throttle 24. In this way it is achieved that the nozzle 22 and the throttle 24 are cheaper to manufacture by injection molding and flow noise is reduced.
  • the throttle 24 with the prefilter 23 is arranged, for example, near the pressure line 10 and, in the case of a suction jet pump 20 arranged upright, for example near the nozzle 22.
  • FIG. 3 shows a three-dimensional view of the exemplary embodiment according to FIG. 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Filtration Of Liquid (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Magnetic Heads (AREA)

Abstract

A fuel delivery device in which a preliminary filter and a throttle are provided in a drive line of a suction jet pump. The throttle is integrally formed with or connected to a preliminary filter to thereby reduce the manufacturing costs and simplify installation.

Description

Vorrichtung zum Fördern von Kraftstoff aus einem Vorratsbehälter zu einer BrennkraftmaschineDevice for delivering fuel from a reservoir to an internal combustion engine
Stand der TechnikState of the art
Die Erfindung geht aus von einer Vorrichtung nach der Gattung des Hauptanspruchs.The invention relates to a device according to the preamble of the main claim.
In der nicht vorveröffentlichten deutschen Patentanmeldung 103 03 390 ist bereits eine Vorrichtung zum Fördern von Kraftstoff vorgeschlagen worden, bei der ein Vorfilter und eine Drossel in einer Treibleitung einer Saugstrahlpumpe separat vorgesehen sind. Die separate Montage von Vorfilter und Drossel in der Treibleitung ist aufwendig und teuer.In the unpublished German patent application 103 03 390, a device for conveying fuel has already been proposed, in which a prefilter and a throttle are provided separately in a drive line of a suction jet pump. The separate installation of the pre-filter and throttle in the drive line is complex and expensive.
Die DE 195 04 217 AI zeigt eine Vorrichtung zum Fördern von Kraftstoff mit einer vorlaufgespeisten Treibleitung, die zur Durchflußbegrenzung eine Drossel aufweist. Schmutzpartikel aus dem Kraftstoff und der Vorrichtung können die Drossel verstopfen und dadurch ein Liegenbleiben des Fahrzeugs verursachen. Vorteile der ErfindungDE 195 04 217 AI shows a device for conveying fuel with a feed-fed drive line, which has a throttle to limit the flow. Dirt particles from the fuel and the device can clog the throttle and cause the vehicle to stop. Advantages of the invention
Die erfindungsgemäße Vorrichtung mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, daß die Herstellungskosten verringert werden und die Montage des Vorfilters und der Drossel in der Treibleitung vereinfacht wird, indem die Drossel einteilig mit einem Vorfilter verbunden ist. Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen der im Hauptanspruch angegebenen Vorrichtung möglich.The device according to the invention with the characterizing features of the main claim has the advantage that the manufacturing costs are reduced and the assembly of the prefilter and the throttle in the drive line is simplified by the throttle being integrally connected to a prefilter. Advantageous further developments and improvements of the device specified in the main claim are possible through the measures listed in the subclaims.
Besonders vorteilhaft ist, wenn die Drossel mit dem Vorfilter mittels Spritzguß hergestellt ist, da dies ein besonders kostengünstiges Herstellungsverfahren ist.It is particularly advantageous if the throttle with the prefilter is manufactured by means of injection molding, since this is a particularly cost-effective manufacturing process.
Sehr vorteilhaft ist es, wenn die Drossel mit dem Vorfilter in die Treibleitung gepreßt, geclipst, geklebt oder geschweißt ist, da dies besonders einfache Montagelösungen sind.It is very advantageous if the throttle with the prefilter is pressed, clipped, glued or welded into the drive line, since these are particularly simple assembly solutions.
In einer vorteilhaften Ausgestaltung hat die Drossel eine Drosselöffnung mit einem Flächeninhalt, der sich bei kreisförmiger Ausbildung aus einem Durchmesser von 0,6 bis 1 Millimeter ergibt, und der Vorfilter Filteröffnungen, wobei der Flächeninhalt einer Filteröffnung jeweils kleiner ist als der Flächeninhalt der Drosselöffnung. Dadurch ist sichergestellt, daß alle Schmutzpartikel, die die Drosselöffnung verstopfen könnten, stromauf der Drosselöffnung herausgefiltert werden. Auch vorteilhaft ist, wenn der Vorfilter als Filtertopf mit einem Filterboden und einer Umfangswandung ausgebildet ist, wobei in dem Filterboden und/oder in der Umfangswandung Filteröffnungen vorgesehen sind, da auf diese Weise eine möglichst große Filterfläche erzielt wird, die unanfällig gegen Verstopfen ist.In an advantageous embodiment, the throttle has a throttle opening with a surface area, which results in a circular design from a diameter of 0.6 to 1 millimeter, and the prefilter filter openings, the surface area of a filter opening being smaller than the surface area of the throttle opening. This ensures that all dirt particles that could clog the throttle opening are filtered out upstream of the throttle opening. It is also advantageous if the prefilter is designed as a filter bowl with a filter base and a peripheral wall, filter openings being provided in the filter base and / or in the peripheral wall, since in this way the largest possible filter area is achieved which is not susceptible to clogging.
Desweiteren vorteilhaft ist, wenn sich der Filtertopf in Strömungsrichtung verjüngt, da die Strömung auf diese Weise beschleunigt wird.It is also advantageous if the filter bowl tapers in the direction of flow, since the flow is accelerated in this way.
Darüber hinaus vorteilhaft ist, wenn die Drossel als Deckel ausgebildet ist, in dem eine Drosselöffnung vorgesehen ist, da dies eine besonders einfache AusführungsVariante darstellt.It is also advantageous if the throttle is designed as a cover in which a throttle opening is provided, since this represents a particularly simple embodiment variant.
Vorteilhaft ist, wenn der Filtertopf und der Deckel über Verbindungsstege miteinander verbunden sind, da die Verbindungsstege einen ausreichenden Abstand zwischen dem Vorfilter und der Drossel schaffen, so daß sowohl der über den Filterboden als auch der über die Umfangswandung strömende Kraftstoff strömungsgünstig zu der Drosselöffnung gelangen kann.It is advantageous if the filter bowl and the cover are connected to one another via connecting webs, since the connecting webs create a sufficient distance between the prefilter and the throttle, so that both the fuel flowing over the filter base and the fuel flowing over the peripheral wall can reach the throttle opening in a streamlined manner ,
Außerdem vorteilhaft ist, wenn der Vorfilter mit einerIt is also advantageous if the pre-filter with a
Schulter und die Drossel mit einem Kragen bündig innerhalb der Treibleitung an einer Treibleitungswandung anliegen, da auf diese Weise eine Leckage des Kraftstoffs am Vorfilter und an der Drossel vorbei vermieden wird.Shoulders and the throttle with a collar lie flush within the drive line on a wall of the drive line, since in this way leakage of the fuel past the prefilter and past the throttle is avoided.
Zeichnung Ein Ausfuhrungsbeispiel der Erfindung ist in der Zeichnung vereinfacht dargestellt und in der nachfolgenden Beschreibung naher erläutert. Fig.l zeigt vereinfacht im Schnitt eine erfindungsge aße Vorrichtung zum Fördern von Kraftstoff, Fig.2 im Schnitt eine Drossel mit integriertem Vorfilter und Fig. 3 eine dreidimensionale Ansicht des Ausfuhrungsbeispiels gemäß Fig.2.drawing An exemplary embodiment of the invention is shown in simplified form in the drawing and explained in more detail in the following description. Fig.l shows in simplified form a device according to the invention for conveying fuel, Fig.2 in section a throttle with integrated pre-filter and Fig. 3 is a three-dimensional view of the exemplary embodiment according to Fig.2.
Beschreibung des AusführungsbeispielsDescription of the embodiment
Fig.l zeigt eine erfindungsgemaße Vorrichtung zum Fordern von Kraftstoff aus einem Vorratsbehalter zu einer Brennkraftmaschine eines Kraftfahrzeugs.Fig.l shows an inventive device for requesting fuel from a reservoir to an internal combustion engine of a motor vehicle.
Die er indungsgemaße Vorrichtung weist ein in einemThe device according to the invention has one in one
Vorratsbehalter 1 angeordnetes Kraftstofffordermodul 2 auf. In dem Vorratsbehalter 1 ist beispielsweise ein Kraftstoff 3 gespeichert.Reservoir 1 arranged fuel request module 2. A fuel 3 is stored in the storage container 1, for example.
Das Kraftstofffordermodul 2 besteht aus einem beispielsweise topfformigen Speicherbehalter 4, in dem eine Forderpumpe 7 angeordnet ist, die Kraftstoff beispielsweise über einen Filter 8 und eine Saugleitung 9 aus dem Speicherbehalter 4 ansaugt und druckerhoht über eine Druckleitung 10 zu einer Brennkraftmaschine 11 fordert. Der Speicherbehalter 4 bevorratet ausreichend viel Kraftstoff, damit eine Kraftstoffversorgung der Brennkraftmaschine 11 durch die Forderpumpe 7 sichergestellt ist, auch wenn, beispielsweise durch eine Kurvenfahrt und dadurch bedingte Schwappbewegungen des Kraftstoffs im Vorratsbehalter 1, kein Kraftstoff in den Speicherbehalter 4 gefordert wird. Der Speicherbehalter 4 ist mit seinem Topfboden 5 nahe einem Tankboden 6 des Vorratsbehalters 1 angeordnet. Die Förderpumpe 7 ist beispielsweise eine Strömungspumpe, die elektrisch von einem Aktor, beispielsweise einem Anker eines Elektromotors, angetrieben wird. Der Filter 8 schützt die Vorrichtung stromab des Filters 8 vor im Kraftstoff enthaltenen groben Schmutzpartikeln.The fuel delivery module 2 consists of, for example, a pot-shaped storage tank 4, in which a delivery pump 7 is arranged, which draws fuel from the storage tank 4, for example via a filter 8 and a suction line 9, and supplies it to an internal combustion engine 11 via a pressure line 10 at increased pressure. The storage tank 4 stores a sufficient amount of fuel so that a fuel supply to the internal combustion engine 11 is ensured by the delivery pump 7, even if, for example due to cornering and the resulting sloshing movements of the fuel in the storage tank 1, no fuel is required in the storage tank 4. The storage container 4 is arranged with its pot bottom 5 near a tank bottom 6 of the storage container 1. The feed pump 7 is, for example, a flow pump that is driven electrically by an actuator, for example an armature of an electric motor. The filter 8 protects the device downstream of the filter 8 from coarse dirt particles contained in the fuel.
In der Druckleitung 10 ist beispielsweise ein Rückschlagventil 14 und stromab des Rückschlagventils 14 ein Hauptfilter 15 angeordnet, der die im Kraftstoff enthaltenen feinen Schmutzpartikel herausfiltert. Das Rückschlagventil 14 verhindert, daß Kraftstoff bei abgeschalteter Förderpumpe 7 aus der Druckleitung 10 von stromab des Rückschlagventils 14 über die Druckleitung nach stromauf des Rückschlagventils 14, die Förderpumpe 1 , die Saugleitung 9 und den Filter 8 in den Speicherbehälter 4 zurückläuft. Auf diese Weise bleibt der von der Förderpumpe 7 aufgebaute Druck in der Druckleitung 10 auch bei abgeschalteter Förderpumpe 7 über eine gewisse Zeit erhalten.A check valve 14 is arranged in the pressure line 10, for example, and a main filter 15 downstream of the check valve 14, which filters out the fine dirt particles contained in the fuel. The check valve 14 prevents fuel when the feed pump 7 is switched off from the pressure line 10 from downstream of the check valve 14 via the pressure line upstream of the check valve 14, the feed pump 1, the suction line 9 and the filter 8 back into the storage container 4. In this way, the pressure built up by the feed pump 7 in the pressure line 10 is maintained for a certain time even when the feed pump 7 is switched off.
Stromab des Hauptfilters 15 ist an der Druckleitung 10 eine Zweigleitung 16 vorgesehen, die in den Speicherbehälter 4 mündet. Die Zweigleitung 16 weist ein Druckregelventil 17 auf. Wenn der Druck in der Druckleitung 10 und damit in der Zweigleitung 16 einen vorbestimmten Druck überschreitet, öffnet das Druckregelventil 17 und läßt Kraftstoff aus der Druckleitung 10 über die Zweigleitung 16 in den Speicherbehälter 4 strömen. Auf diese Weise sinkt der Druck in der Druckleitung 10 wieder unter den vorbestimmten Druck ab, so daß das Druckregelventil 17 schließt und keinen Kraftstoff mehr über die Zweigleitung 16 in den Speicherbehälter 4 abströmen läßt. Mittels des Druckregelventils 17 wird der Druck in der Druckleitung 10 stromab des Rückschlagventils 14 auf einen konstanten Wert geregelt. Damit der Speicherbehalter 4 nicht von der Forderpumpe 7 leer gesaugt wird, muß laufend Kraftstoff aus dem Vorratsbehalter 1 in den Speicherbehalter 4 nachstromen. Dazu ist an dem Speicherbehalter 4 wenigstens eine Saugstrahlpumpe 20 vorgesehen, die Kraftstoff aus dem Vorratsbehalter 1 in den Speicherbehalter 4 fordert.Downstream of the main filter 15, a branch line 16 is provided on the pressure line 10 and opens into the storage tank 4. The branch line 16 has a pressure control valve 17. When the pressure in the pressure line 10 and thus in the branch line 16 exceeds a predetermined pressure, the pressure control valve 17 opens and allows fuel from the pressure line 10 to flow into the storage tank 4 via the branch line 16. In this way, the pressure in the pressure line 10 drops again below the predetermined pressure, so that the pressure control valve 17 closes and no more fuel can flow out into the storage tank 4 via the branch line 16. The pressure in the pressure line 10 downstream of the check valve 14 is regulated to a constant value by means of the pressure control valve 17. So that the storage tank 4 is not sucked empty by the feed pump 7, fuel must continuously flow from the storage tank 1 into the storage tank 4. For this purpose, at least one suction jet pump 20 is provided on the storage tank 4, which pumps fuel from the storage tank 1 into the storage tank 4.
Eine Saugstrahlpumpe ist beispielsweise aus der DE 198 56 298 CI bekannt, wobei deren Inhalt ausdr cklich Teil der Offenbarung dieser Anmeldung sein soll.A suction jet pump is known, for example, from DE 198 56 298 CI, the content of which is expressly intended to be part of the disclosure of this application.
Von der Druckleitung 10 aus, im Bereich stromab der Forderpumpe 7 und stromauf des Ruckschlagventils 14, verlauft eine Treibleitung 21 zu einer Düse 22 der Saugstrahlpumpe 20.From the pressure line 10, in the area downstream of the feed pump 7 and upstream of the check valve 14, a drive line 21 runs to a nozzle 22 of the suction jet pump 20.
In der Treibleitung 21 ist ein Vorfilter 23 und stromab des Vorfilters 23 eine Drossel 24 angeordnet. Der Vorfilter 23 schützt die Drossel 24 vor Schmutzpartikeln, die die Drossel 24 verstopfen konnten. Die Drossel 24 begrenzt den über die Treibleitung 21 fließenden Volumenstrom. Erfindungsgemaß ist die Drossel 24 einteilig mit dem Vorfilter 23 verbunden. Der Vorfilter 23 ist dadurch in die Drossel 24 integriert.A pre-filter 23 is arranged in the drive line 21 and a throttle 24 is arranged downstream of the pre-filter 23. The pre-filter 23 protects the throttle 24 from dirt particles that could clog the throttle 24. The throttle 24 limits the volume flow flowing through the drive line 21. According to the invention, the throttle 24 is connected in one piece to the prefilter 23. The pre-filter 23 is thereby integrated in the throttle 24.
Die Düse 22 ist an einem dem Vorratsbehalter 1 zugewandten Ende der Treibleitung 21 angeordnet, beispielsweise an oder in die Treibleitung 21 geklemmt, geclipst, geklebt oder geschweißt. Die Düse 22 weist eine in einen Saugraum 27 mundende Dusenoffnung 28 auf. Der Saugraum 27 ist durch eine Einbuchtung 25 im Topfboden 5 gebildet und über eine Ansaugoffnung 19 mit dem Vorratsbehalter 1 verbunden. Der Saugraum 27 ist begrenzt durch den Topfboden 5, die Düse 22, die Ansaugoffnung 19 und einen stromab des Saugraums 27 vorgesehenen Mischkanal 29, der vom Saugraum 27 ausgehend beispielsweise horizontal in Richtung des Tankbodens 6 verläuft. Eine Saugstrahlpumpe mit horizontal verlaufendem Mischkanal wird auch als liegend angeordnete Saugstrahlpumpe, eine Saugstrahlpumpe mit vertikal verlaufendem Mischkanal dagegen als stehend angeordnete Saugstrahlpumpe bezeichnet. Der Mischkanal 29 mündet an einem dem Speicherbehälter 4 zugewandten Ende des Mischkanals 29 über ein weiteres, in Richtung Vorratsbehalter 1 schließendes Rückschlagventil, beispielsweise ein Schirmventil 30, in den Speicherbehälter 4. Der Mischkanal 29 weist an dem dem Speicherbehälter 4 zugewandten Ende beispielsweise einen Diffusorabschnitt 31 auf, in dem sich der Mischkanal 29 in Strömungsrichtung, beispielsweise quer zur Zeichenebene, erweitert.The nozzle 22 is arranged on an end of the drive line 21 facing the storage container 1, for example clamped, clipped, glued or welded to or in the drive line 21. The nozzle 22 has a nozzle opening 28 opening into a suction space 27. The suction space 27 is formed by an indentation 25 in the pot base 5 and connected to the storage container 1 via a suction opening 19. The suction space 27 is delimited by the pot base 5, the nozzle 22, the suction opening 19 and a mixing channel 29 provided downstream of the suction space 27 and starting from the suction space 27 for example runs horizontally in the direction of the tank bottom 6. A suction jet pump with a horizontally running mixing channel is also referred to as a lying suction jet pump, a suction jet pump with a vertically running mixing channel, on the other hand, is called a standing suction jet pump. The mixing channel 29 opens into the storage tank 4 at an end of the mixing channel 29 facing the storage tank 4 via a further check valve, for example an umbrella valve 30, which closes in the direction of the storage tank 1. The mixing channel 29 has, for example, a diffuser section 31 at the end facing the storage tank 4 in which the mixing channel 29 widens in the direction of flow, for example transversely to the plane of the drawing.
Bei Betrieb der Förderpumpe 7 wird Kraftstoff über die Druckleitung 10, die Treibleitung 21 und die Dusenoffnung 2£ der Düse 22 als ein Treibstrahl in den Saugraum 27 eingespritzt. Bekannterweise reißt der Treibstrahl beim Eintritt in den Saugraum 27 Kraftstoff in Strömungsrichtung mit, so daß im Saugraum 27 ein Unterdruck entsteht, der weiteren Kraftstoff aus dem Vorratsbehalter 1 in den Saugraum 27 nachströmen läßt. Der Kraftstoff des Treibstrahls und der von dem Treibstrahl mitgerissene Kraftstoff gelangt über eine Eingangsöffnung 37 des Mischkanals , 29 in den Mischkanal 29 und über eine Ventilöffnung 35 des Schirmventils 30 in den Speicherbehälter 4. Fig.2 zeigt im Schnitt die Drossel mit integriertem Vorfilter .When the feed pump 7 is operating, fuel is injected into the suction space 27 as a propellant jet via the pressure line 10, the drive line 21 and the nozzle opening 2 l of the nozzle 22. As is known, the propellant jet entrains fuel in the flow direction when it enters the suction chamber 27, so that a negative pressure is created in the suction chamber 27, which allows further fuel to flow from the reservoir 1 into the suction chamber 27. The fuel of the propellant jet and the fuel entrained by the propellant jet pass through an inlet opening 37 of the mixing channel 29 into the mixing channel 29 and via a valve opening 35 of the screen valve 30 into the storage container 4. Fig. 2 shows the throttle with an integrated pre-filter.
Bei der Vorrichtung nach Fig.2 sind die gegenüber der Vorrichtung nach Fig.l gleichbleibenden oder gleichwirkenden Teile durch die gleichen Bezugszeichen gekennzeichnet.In the device according to FIG. 2, the parts that remain the same or have the same effect as the device according to FIG. 1 are identified by the same reference numerals.
Die in der Treibleitung 21 angeordnete Drossel 24 ist beispielsweise deckeiförmig als Deckel 40 ausgebildet, wobei in dem Deckel 40 eine den Deckel 40 durchdringende Drosselöffnung 41 vorgesehen ist. Die Drosse löffnung 41 ist beispielsweise zentrisch zur Treibleitung 21 angeordnet und hat beispielsweise bei kreisförmiger Ausbildung einen Durchmesser von 0,6 bis 1 Millimeter, kann aber ausdrücklich auch einen anderen Durchmesser und andere Foxmen mit anderen Flächeninhalten aufweisen. Bei den anderen Formen ist der Flächeninhalt der Drosselöffnung 41 beispielsweise so gewählt, daß er dem Flächeninhalt einer kreisförmiger Ausbildung mit einem Durchmesser von 0,6 bis 1 Millimeter entspricht.The throttle 24 arranged in the drive line 21 is designed, for example, in a cover-shaped manner as a cover 40, a throttle opening 41 penetrating the cover 40 being provided in the cover 40. The throttle opening 41 is arranged, for example, centrally to the drive line 21 and has a diameter of 0.6 to 1 millimeter, for example, in the case of a circular design, but can also expressly have a different diameter and other Foxmen with different surface areas. In the other forms, the area of the throttle opening 41 is selected, for example, so that it corresponds to the area of a circular configuration with a diameter of 0.6 to 1 millimeter.
Der Deckel 40 weist an seinem Umfang einen ringförmigen Kragen 44 auf, der in Richtung Düse 22 greift. An der der Förderpumpe 7 zugewandten Oberseite 42 des Deckels 40 ist der Vorfilter 23 angeordnet, der beispielsweise topfförmig als Filtertopf 43 ausgebildet ist. Der Filterrtopf 43 besteht aus einem Filterboden 46 und einer Umfangswandung 47, wobei der Filterboden 46 und die Umfangswandung 47 einen Filterraum 48 einschließen, der auf der dem Filterboden 46 abgewandten Seite offen und mit der Treibleitung 21 strömungsverbunden ist. Der Filterboden 46 und die Umfangswandung 47 sind beispielsweise eben ausgebildet, können aber auch gewölbt sein. Der Filterboden 46 und der Deckel 40 liegen einander gegenüber, wobei der Filterboden 46 beispielsweise parallel zum Deckel 40 oder: auch schräg zum Deckel 40 angeordnet ist. Der Filtertopf 43 ist beispielsweise viereckformig, dreieckformig, rechteckformig, vieleckformig, kreisförmig oder oval ausgeführt und verjungt sich beispielsweise in Stromungsrichtung. In dem Filterboden 46 und/ oder in der Umfangswandung 47 des Filtertopfes 43 sind Filteroffnungen 49 beliebiger Form vorgesehen, wobei eine Filteroffnung 49 jeweils einen kleineren Flacheninhalt hat als die Drosseloffnung 41. Dadurch ist sichergestellt, daß alle Schmutzpartikel, die die Drosseloffnung 41 verstopfen konnten, im Vorfilter 23 stromauf der Drosseloffnung 41 herausgefiltert werden. Die Filteroffnungen 49 haben beispielsweise bei kreisförmiger Ausbildung einen Durchmesser von 0,5 Millimetern. Es sind aber ausdrücklich auch kreisförmige Filteroffnungen 49 mit einem anderen Durchmesser als 0,5 Millimeter möglich. Durch die am Filtertopf 43 vorgesehenen Filteroffnungen 49 wird eine große Filterflache gebildet, so daß der Vorfilter 23 unempfindlich gegen Verstopfen ist. Wenn sich Schmutzpartikel in oder an einer Filteroffnung 49 festsetzen und dadurch verstopfen, sind immer noch viele weitereThe cover 40 has an annular collar 44 on its circumference, which engages in the direction of the nozzle 22. On the upper side 42 of the cover 40 facing the feed pump 7, the pre-filter 23 is arranged, which is for example cup-shaped as a filter bowl 43. The filter bowl 43 consists of a filter base 46 and a peripheral wall 47, the filter base 46 and the peripheral wall 47 enclosing a filter space 48 which is open on the side facing away from the filter base 46 and is in flow connection with the drive line 21. The filter base 46 and the peripheral wall 47 are, for example, flat, but can also be curved. The filter base 46 and the cover 40 lie opposite one another, the filter base 46, for example, parallel to the cover 40 or: also obliquely is arranged to cover 40. The filter bowl 43 is, for example, square, triangular, rectangular, polygonal, circular or oval and tapers, for example, in the direction of flow. Filter openings 49 of any shape are provided in the filter base 46 and / or in the peripheral wall 47 of the filter bowl 43, a filter opening 49 each having a smaller area than the throttle opening 41. This ensures that all dirt particles that could clog the throttle opening 41 are filtered out in the prefilter 23 upstream of the throttle opening 41. The filter openings 49 have a diameter of 0.5 millimeters, for example, with a circular design. However, circular filter openings 49 with a diameter other than 0.5 millimeters are also expressly possible. A large filter area is formed by the filter openings 49 provided on the filter bowl 43, so that the pre-filter 23 is insensitive to clogging. If dirt particles get stuck in or on a filter opening 49 and thereby become blocked, there are still many more
Filteröffnungen 49 durchlassig für Kraftstoff. An einem dem Filterboden 46 abgewandten Topfrand 50 des Filtertopfes 43 ist eine scheibenförmige Schulter 51 vorgesehen, die radial nach außen bis an eine Treibleitungwandung 53 der Treibleitung 21 greift. Der Vorfilter 23 liegt mit derFilter openings 49 permeable to fuel. On a pot edge 50 of the filter bowl 43 facing away from the filter base 46, a disk-shaped shoulder 51 is provided, which reaches radially outwards up to a drive line wall 53 of the drive line 21. The prefilter 23 lies with the
Schulter 51 und die Drossel 24 mit dem Kragen 44 des Deckels 40 oder mit einer an dem Kragen 44 ringförmig umlaufenden Dichtlippe 45 bündig an der Treibleitungswandung 53 der Treibleitung 21 an, so daß eine Leckage, die den Vorfilter 23 und die Drossel 24 als Bypaßstrom umgeht, vermieden wird.Shoulder 51 and the throttle 24 with the collar 44 of the cover 40 or with a sealing lip 45 encircling the collar 44 flush against the drive line wall 53 of the drive line 21, so that leakage bypassing the pre-filter 23 and the throttle 24 as a bypass flow , is avoided.
Die Umfangswandung 47 ist radial beabstandet zu der Treibleitungswandung 53. Der Deckel 40 der Drossel 24 und der topfformige Vorfilter 23 sind über beispielsweise zwei Verbindungsstege 54 einteilig miteinander verbunden. Die Verbindungsstege 54 verlaufen von der Oberseite 42 des Deckels 40 ausgehend senkrecht oder geneigt nach oben und sind beispielsweise mit der Umfangswandung 47 und/oder dem Filterboden 46 verbunden. Durch die Verbindungsstege 54 ist der Deckel 40 mit der Drosselöffnung 41 beabstandet zu dem Filtertopf 43. Die Schulter 51, die Oberseite 42 des Deckels 40, die Treibleitungswandung 53 und die Umfangswandung 47 schließen einen Stauraum 55 ein. Der Filterraum 48 und der Stauraum 55 sind über die Filteröffnungen 49 miteinander strömungsverbunden.The peripheral wall 47 is radially spaced from the drive line wall 53. The cover 40 of the throttle 24 and the pot-shaped pre-filter 23 are connected to one another in one piece via, for example, two connecting webs 54. The Connecting webs 54 extend vertically or inclined upwards from the top 42 of the cover 40 and are connected, for example, to the peripheral wall 47 and / or the filter base 46. By means of the connecting webs 54, the cover 40 with the throttle opening 41 is spaced apart from the filter bowl 43. The shoulder 51, the upper side 42 of the cover 40, the drive line wall 53 and the peripheral wall 47 enclose a storage space 55. The filter space 48 and the storage space 55 are fluidly connected to one another via the filter openings 49.
Der Kraftstoff der Treibleitung 21 stromauf des Vorfilters 23 strömt in den Filterraum 48, über die Filteröffnungen 49 in dem Filterboden 46 und /oder in der Umfangswandung 47 in den Stauraum 55. Im Stauraum 55 strömt der Kraftstoff inThe fuel of the drive line 21 upstream of the pre-filter 23 flows into the filter space 48, via the filter openings 49 in the filter base 46 and / or in the peripheral wall 47 into the storage space 55. The fuel flows into the storage space 55
Richtung Drosselöffnung 41. Der über die Filteröffnungen 49 der Umfangswandung 47 strömende Kraftstoff hat einen weiteren Strömungsweg zur Drosselöffnung 41 als der über die Filteröffnungen 49 des Filterbodens 46 strömende Kraftstoff. Damit der über die Filteröffnungen 49 der Umfangswandung 47 strömende Kraftstoff strömungsgünstig zur Drosselöffnung 41 gelangt, muß der Abstand zwischen dem Filterboden 46 und dem Deckel 40 ausreichend groß gewählt werden. Die Strömung wird stromauf der Drosselöffnung 41 eingeschnürt und gelangt strahlförmig durch die Drosselöffnung 41 in Richtung Düse 22. Die Drosselöffnung 41 der Drossel 24 hat die Funktion eines Duchflußbegrenzers . Durch die entsprechende Auslegung des Durchmessers der Drosselöffnung 41 wird der über die Treibleitung 21 und durch die Drosselöffnung 41 strömende Volumenstrom eingestellt. Die Drossel 24 mit dem Vorfilter 23 ist beispielsweise mittels Spritzguß hergestellt. Die Drossel 24 kann auch mittels Kleben oder Schweißen mit dem Vorfilter 23 einteilig zusammengefügt sein. Durch die einteilige Ausbildung von der Drossel 24 und dem Vorfilter 23 werden die Herstellungskosten der beiden Teile gesenkt und die Montage vereinfacht. Von dem Vorfilter 23 stromauf der Drossel 24 werden Schmutzpartikel aus dem Kraftstoff der Treibleitung 21 und vom Herstellungsprozeß der Vorrichtung stammende Schmutzpartikel herausgefiltert, so daß die Drossel 24 nicht verstopft. Eine verstopfte Drossel 24 würde dazu führen, daß kein Kraftstoff mehr von der Saugstrahlpumpe 20 in den Speicherbehälter 4 gefördert würde, so daß der Füllstand im Speicherbehälter 4 nach gewisser Zeit absinken würde und die Förderpumpe 7 nicht mit ausreichend viel Kraftstoff versorgt wäre. Besonders bei niedrigem Füllstand im Vorratsbehalter 1 hätte dies ein Liegenbleiben des Fahrzeugs zur Folge.Direction of throttle opening 41. The fuel flowing through the filter openings 49 of the peripheral wall 47 has a further flow path to the throttle opening 41 than the fuel flowing through the filter openings 49 of the filter base 46. So that the fuel flowing through the filter openings 49 of the peripheral wall 47 reaches the throttle opening 41 in a streamlined manner, the distance between the filter base 46 and the cover 40 must be chosen to be sufficiently large. The flow is constricted upstream of the throttle opening 41 and arrives in the form of a jet through the throttle opening 41 in the direction of the nozzle 22. The throttle opening 41 of the throttle 24 has the function of a flow limiter. The volume flow flowing through the drive line 21 and through the throttle opening 41 is set by appropriately designing the diameter of the throttle opening 41. The throttle 24 with the prefilter 23 is produced, for example, by means of injection molding. The throttle 24 can also be assembled in one piece with the prefilter 23 by means of gluing or welding. The one-piece design of the throttle 24 and the prefilter 23 reduces the manufacturing costs of the two parts and simplifies assembly. Dirt particles from the fuel of the drive line 21 and dirt particles originating from the manufacturing process of the device are filtered out by the pre-filter 23 upstream of the throttle 24, so that the throttle 24 does not become blocked. A blocked throttle 24 would result in no more fuel being pumped from the suction jet pump 20 into the storage tank 4, so that the fill level in the storage tank 4 would drop after a certain time and the feed pump 7 would not be supplied with sufficient fuel. Particularly if the fill level in the storage container 1 is low, this would result in the vehicle stopping.
Die Drossel 24 mit integriertem Vorfilter 23 ist als separates Bauteil, insbesondere aus Kunststoff gefertigt, in der Treibleitung 21 vorgesehen. Auf diese Weise kann die Dro≤selöffnung 41 mit hoher Genauigkeit und ohne störende Trenngrate gefertigt werden. Konstruktive Änderungen zur Anpassung des über die Treibleitung 21 strömenden Volumenstroms sind daher nur an der separaten Drossel 24 und nicht am Kraftstofffordermodul 2 selbst erforderlich.The throttle 24 with an integrated pre-filter 23 is provided as a separate component, in particular made of plastic, in the drive line 21. In this way, the nozzle opening 41 can be manufactured with high accuracy and without disruptive burrs. Constructive changes to adapt the volume flow flowing via the drive line 21 are therefore only required on the separate throttle 24 and not on the fuel demand module 2 itself.
Durch die der Düse 22 vorgeschalteten Drossel 24 wird ein mehrstufiger Druckabfall erreicht, so daß die Drosselöffnung 41 der Drossel 24 und die Düsenöffnung 28 der Düse 22 größer gewählt werden kann als bei einem einstufigen Druckabfall nur an der Düse 22 ohne Drossel 24. Auf diese Weise wird erreicht, daß die Düse 22 und die Drossel 24 mittels Spritzguß billiger herstellbar sind und auftretende Strömungsgeräusche verringert werden. Bei einer liegend angeordneten Saugstrahlpumpe 20 ist die Drossel 24 mit dem Vorfilter 23 beispielsweise nahe der Druckleitung 10 und bei einer stehend angeordneten Saugstrahlpumpe 20 beispielsweise nahe der Düse 22 angeordnet .Through the throttle 24 upstream of the nozzle 22, a multi-stage pressure drop is achieved, so that the throttle opening 41 of the throttle 24 and the nozzle opening 28 of the nozzle 22 can be chosen to be larger than in the case of a single-stage pressure drop only at the nozzle 22 without a throttle 24. In this way it is achieved that the nozzle 22 and the throttle 24 are cheaper to manufacture by injection molding and flow noise is reduced. In the case of a suction jet pump 20 arranged horizontally, the throttle 24 with the prefilter 23 is arranged, for example, near the pressure line 10 and, in the case of a suction jet pump 20 arranged upright, for example near the nozzle 22.
Fig. 3 zeigt eine dreidimensionale Ansicht des Ausführungsbeispiels gemäß Fig.2. FIG. 3 shows a three-dimensional view of the exemplary embodiment according to FIG. 2.

Claims

Ansprüche Expectations
1. Vorrichtung zum Fördern von Kraftstoff aus einem Vorratsbehalter zu einer Brennkraftmaschine eines Kraftfahrzeugs mit einer in einer Treibleitung für eine Saugstrahlpumpe angeordneten Drossel, dadurch gekennzeichnet, dass die Drossel (24) einteilig mit einem Vorfilter (23) verbunden ist.1. Device for conveying fuel from a reservoir to an internal combustion engine of a motor vehicle with a throttle arranged in a drive line for a suction jet pump, characterized in that the throttle (24) is connected in one piece to a pre-filter (23).
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Drossel (24) mit dem Vorfilter (23) mittels Spritzguß hergestellt ist.2. Device according to claim 1, characterized in that the throttle (24) with the prefilter (23) is made by injection molding.
3. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Drossel (24) mit dem Vorfilter (23) in die Treibleitung gepreßt, geclipst geklebt oder geschweißt ist .3. Device according to claim 1, characterized in that the throttle (24) with the prefilter (23) is pressed into the drive line, clipped or welded.
4. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Drossel (24) eine Drosselöffnung (41) mit einem Flächeninhalt hat, der sich bei kreisförmiger Ausbildung aus einem Durchmesser von 0,6 bis 1 Millimeter ergibt. 4. The device according to claim 1, characterized in that the throttle (24) has a throttle opening (41) with a surface area which results in a circular design from a diameter of 0.6 to 1 millimeter.
5. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Vorfilter (23) Filteroffnungen (49) aufweist, wobei der Flächeninhalt einer Filteroffnung (49) jeweils kleiner ist als der Flächeninhalt einer Drosseloffnung (41) der Drossel (24) .5. The device according to claim 1, characterized in that the pre-filter (23) has filter openings (49), the area of a filter opening (49) is smaller than the area of a throttle opening (41) of the throttle (24).
6. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Vorfilter (23) als Filtertopf (43) mit einem Filterboden (46) und einer Umfangswandung (47) ausgebildet ist, wobei m dem Filterboden (46) und/oder m der Umfangswandung (47) Filteroffnungen (49) vorgesehen sind.6. The device according to claim 1, characterized in that the pre-filter (23) is designed as a filter bowl (43) with a filter base (46) and a peripheral wall (47), wherein m the filter base (46) and / or m of the peripheral wall ( 47) filter openings (49) are provided.
7. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass sich der Filtertopf (43) m Stromungsrichtung verjungt.7. The device according to claim 6, characterized in that the filter bowl (43) tapers in the direction of flow.
8. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Drossel (24) als Deckel (40) ausgebildet ist, m dem eine Drosseloffnung (41) vorgesehen ist.8. The device according to claim 1, characterized in that the throttle (24) is designed as a cover (40), which is provided with a throttle opening (41).
9. Vorrichtung nach Anspruch 6 und 8, dadurch gekennzeichnet, dass der Filtertopf (43) und der Deckel (40) über Verbindungsstege (54) miteinander verbunden sind.9. The device according to claim 6 and 8, characterized in that the filter bowl (43) and the cover (40) are connected to one another via connecting webs (54).
10. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Vorfilter (23) mit einer Schulter (51) und die Drossel (24) mit einem Kragen (44) bundig an einer Treibleitungswandung (53) der Treibleitung (21) anliegen. 10. The device according to claim 1, characterized in that the pre-filter (23) with a shoulder (51) and the throttle (24) with a collar (44) flush against a wall of the drive line (53) of the drive line (21).
EP04731127A 2003-06-30 2004-05-05 Device for supplying fuel from a reservoir to an internal combustion engine Expired - Lifetime EP1642019B1 (en)

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DE10329268A DE10329268A1 (en) 2003-06-30 2003-06-30 Device for conveying fuel from a reservoir to an internal combustion engine
PCT/DE2004/000946 WO2005001277A1 (en) 2003-06-30 2004-05-05 Device for supplying fuel from a reservoir to an internal combustion engine

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US20070089714A1 (en) 2007-04-26
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DE502004011873D1 (en) 2010-12-23
WO2005001277A1 (en) 2005-01-06

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