EP2699787A1 - Fuel injection system and tank installation unit for a fuel injection system - Google Patents

Fuel injection system and tank installation unit for a fuel injection system

Info

Publication number
EP2699787A1
EP2699787A1 EP12711846.1A EP12711846A EP2699787A1 EP 2699787 A1 EP2699787 A1 EP 2699787A1 EP 12711846 A EP12711846 A EP 12711846A EP 2699787 A1 EP2699787 A1 EP 2699787A1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
injection system
feed pump
fuel
pump
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.)
Withdrawn
Application number
EP12711846.1A
Other languages
German (de)
French (fr)
Inventor
Josef Frank
Alexander Fuchs
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 EP2699787A1 publication Critical patent/EP2699787A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/045—Arrangements for driving rotary positive-displacement pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/08—Feeding by means of driven pumps electrically driven
    • F02M37/10—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04—Feeding by means of driven pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/08—Feeding by means of driven pumps electrically driven
    • F02M37/10—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir
    • F02M37/103—Mounting pumps on fuel tanks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
    • F02M37/50—Filters arranged in or on fuel tanks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • F04C11/008—Enclosed motor pump units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0076—Details of the fuel feeding system related to the fuel tank
    • F02M37/0088—Multiple separate fuel tanks or tanks being at least partially partitioned
    • F02M37/0094—Saddle tanks; Tanks having partition walls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/14—Feeding by means of driven pumps the pumps being combined with other apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2210/00—Fluid
    • F04C2210/10—Fluid working
    • F04C2210/1044—Fuel

Definitions

  • the present invention relates to a fuel injection system according to the preamble of claim 1 and a tank installation unit for a fuel injection system according to the preamble of claim 9.
  • Gears form a delivery room.
  • the second gear is stored in its center on a thorn.
  • the first gear is an external gear and forms the rotor, the second gear is an internal gear, which is entrained in the eccentric center of the first gear.
  • the first gear comprises embedded permanent magnets which are distributed over the circumference. ⁇ uße- Magnetic field generators generate a rotating, rotating field that causes the direct motor consequences of the rotor.
  • the internal gear pump described therein has an internally toothed ring gear and an externally toothed pinion, which meshes to produce a conveying effect in the toothed ring, wherein the pinion is rotatably mounted eccentrically to the toothed ring on a bearing journal.
  • the arrangement of the toothed ring and the pinion is accommodated in a housing, wherein an electrically commutated stator is arranged in the housing, which extends concentrically around the toothed ring and cooperates in the manner of an electric motor with a magnetic ring which concentrically surrounds the toothed ring and rotatably with this connected is.
  • the magnetic ring performs with the toothed ring to generate the conveying effect of a rotational movement.
  • a fuel injection system of an internal combustion engine in particular common rail system, which has an electric feed pump for conveying a fluid medium, in particular for conveying fuel in the fuel injection system, wherein the electric feed pump has a drive arrangement with an electronically commutated motor and a Pump assembly, which form an integral unit, wherein the electric feed pump is adapted to be located in a tank mounting unit which is mountable in a fuel tank of the fuel injection system.
  • the axially very compact design of the electric feed pump of the integrated type, in which the drive assembly and the pump assembly form an integral unit this can be easily installed in a fuel tank, even if very limited space conditions, such as in the case of a saddle tank prevail there.
  • the installation of the electrical delivery pump can be done in comparison to conventional fuel pumps, which require a correspondingly long tank installation unit and thus a correspondingly deep tank, in a smaller, lower and related to their requirements optimized Tankbauisme.
  • the installation of the electric pump of the integrated design in the fuel tank results in addition to the space savings and other benefits.
  • the axially shorter design of the electric pump and thus the total shorter tank installation unit these are positioned in the fuel tank such that can be dispensed with a tank jet pump or a suction line to a venturi after the fuel pump.
  • the electronic commutation of the electric feed pump is advantageous because a significantly longer life is achieved by eliminating the mechanical commutation.
  • the electric pump is less sensitive to vibration and other environmental influences.
  • the electric feed pump is mechanically fixable in or on the tank installation unit, in particular by means of a snap-in connection or by means of screws. This allows fast and cost-effective installation.
  • the electric feed pump is adapted to be loosely disposed in the tank installation unit.
  • a filter is arranged on the suction side of the electric feed pump.
  • the filter is flushed by an intelligent controller
  • the filter maintenance intervals can be advantageously extended. Moreover, it is particularly preferred if the electric fuel pump has at least one integrated heating element. Thus, paraffin precipitates in the diesel fuel can be "thawed" or dissolved directly in the tank installation unit without the need to heat up the entire fuel tank
  • the electrical delivery pump is designed as an internal gear pump.
  • the electronically commutated motor has a rotor and a stator, the rotor being slide-mounted directly in the stator.
  • a tank installation unit for a fuel injection system of an internal combustion engine in particular for a common rail system, wherein in or on the tank installation unit an electric delivery pump for delivering a fluid medium, in particular for delivering fuel in the fuel injection system, is arranged, wherein the electric feed pump has a drive arrangement with an electronically mutated engine and a pump assembly, which form an integral unit.
  • the tank installation unit according to the invention with an electric delivery pump of the integrated design can be installed in a particularly space-saving manner directly into a fuel tank of a fuel injection system, as already explained above.
  • the electric feed pump is fixed by means of a snap-in connection or by means of screws in or on the tank installation unit. This allows a simple, fast and inexpensive installation.
  • Fig. 2 is a sectional view through a fuel tank of a fuel injection system according to the prior art
  • FIG 3 is a sectional view through a fuel tank of a fuel injection system according to an embodiment.
  • 4A, 4B is a schematic representation of a fixing possibility of an electric feed pump in a tank installation unit according to an embodiment.
  • Fig. 1 is a schematic representation of a fuel injection system 1 according to the prior art shown.
  • a fuel tank 5 is conveyed by means of an electric feed pump 2, which has a large axial length, via a connecting line 3 fuel to a high-pressure pump 4.
  • an overflow valve 6 is arranged in the connecting line 3.
  • the fuel tank 5, the electric feed pump 2 and the connecting line 3 are subjected to low pressure and therefore belong to a low-pressure region of the fuel injection system 1.
  • a pressure control valve 8 is attached, which is connected via a line 9 to the fuel tank 5.
  • a high-pressure line 10 which delivers the high-pressure fuel to a high-pressure accumulator 12, which is also referred to as a common rail.
  • high-pressure accumulator 12 From the high-pressure accumulator 12 go through the flow restrictor 13 high pressure lines 14, which deliver the high-pressure fuel from the high pressure accumulator 12 to injectors 15, of which in the figure, only one injection valve 15 is shown for reasons of clarity.
  • the high-pressure line 10, the high-pressure accumulator 12, the high-pressure line 14 and the injection valve 15 contain high-pressure fuel and are therefore assigned to the high-pressure region of the fuel injection system 1.
  • a return line having a first portion 16 and a second portion 17 leads to the fuel tank 5.
  • a pressure-holding valve 18 is connected between the first and second portions 16, 17 of the return line.
  • the pressure-maintaining valve 18 serves to maintain a minimum pressure of about 10 bar in the first section 16 of the return line, which allows filling of a coupling space between the piezoelectric actuator (not shown) and a control valve member (not shown) in the fuel injection system 1, irrespective of the operating state of the fuel injection system 1.
  • the operation of the fuel injection system 1 is controlled by an electronic control unit 11.
  • a pressure limiting valve 7 is provided, which communicates with the return line. When the pressure in the high-pressure accumulator 12 exceeds a predetermined maximum value, the pressure relief valve 7 opens and the overpressure in the high-pressure accumulator 12 is reduced to the low-pressure range.
  • Fig. 2 is a sectional view through a fuel tank 5 according to the prior art.
  • diesel fuel 19 is contained.
  • a tank installation unit 20 is arranged, in which an electric feed pump 2 having a large axial length is provided. Due to the large axial length of the electric feed pump 2, positioning of the tank installation unit 20, which likewise has a large axial length, is limited to a few positions in the fuel tank 5, which have a corresponding axial length.
  • a tank jet pump 21 in the fuel tank 5.
  • 3 is a sectional view through a fuel tank 5 according to an embodiment.
  • the electric feed pump 2 is a pump of the integrated design, in which a drive assembly 22 with an electronically commutated motor (not shown) and a pump assembly 23 form an integral unit 24, as here only schematically indicated.
  • a drive assembly 22 with an electronically commutated motor not shown
  • a pump assembly 23 form an integral unit 24, as here only schematically indicated.
  • the power lines from the power electronics to the drive assembly 22 should be kept as short as possible
  • FIG. 4A and 4B show a schematic representation of a possibility of fixing an electric feed pump 2 in a tank installation unit 20 according to an embodiment.
  • the fixation of the electric feed pump 2 is in this case achieved in a simple and fast manner by a so-called snap-in connection 25, 25 ', which securely holds the electric feed pump 2 in the tank installation unit 20 (FIG. 4B).
  • the electric feed pump 2 is simply pushed between the respective elastic clamping elements 26, 26 'of the snap-in connection 25, 25', which yield elastically outwardly (FIG. 4A).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

The invention relates to a fuel injection system of an internal combustion engine, in particular a common-rail system, which has an electrical feed pump for feeding a fluid medium, in particular for feeding fuel in the fuel injection system, wherein the electrical feed pump has a drive assembly having an electronically commutated motor and a pump assembly which form an integral unit, wherein the electrical feed pump is adapted to be arranged in a tank installation unit which can be installed in a fuel tank of the fuel injection system. The invention further relates to a tank installation unit for a fuel injection system of an internal combustion engine, in particular for a common-rail system, wherein an electrical feed pump for feeding a fluid medium, in particular for feeding fuel in the fuel injection system, is arranged in or on the tank installation unit, wherein the electrical feed pump has a drive assembly having an electronically commutated motor and a pump assembly which form an integral unit.

Description

Beschreibung Titel  Description title
Kraftstoffeinspritzsystem und Tankeinbaueinheit für ein Kraftstoffeinspritzsystem  Fuel injection system and tank installation unit for a fuel injection system
Die vorliegende Erfindung betrifft ein Kraftstoffeinspritzsystem gemäß dem Oberbegriff des Anspruchs 1 und eine Tankeinbaueinheit für ein Kraftstoffeinspritzsystem gemäß dem Oberbegriff des Anspruchs 9. The present invention relates to a fuel injection system according to the preamble of claim 1 and a tank installation unit for a fuel injection system according to the preamble of claim 9.
Stand der Technik State of the art
Als elektrische Förderpumpen zum Fördern von Kraftstoff in einem Kraftstoffeinspritzsystem, wie beispielsweise in einem Common-Rail-System, werden einerseits Flügel- und Rollenzellenpumpen sowie Innen- oder Außenzahnradpumpen eingesetzt, welche axial an eine Motorwelle angeflanscht sind und deren Antriebsmotoren sowohl als DC- oder als„brushless"-DC-Varianten ausgeführt sind. Diese Typen elektrischer Förderpumpen weisen voneinander getrennte Förderund Antriebseinheiten auf. Andererseits sind im Stand der Technik sogenannte integrierte Bauformen bekannt, bei denen die Förder- und Antriebseinheiten nicht getrennt voneinander vorgesehen sind, sondern als nicht trennbare Einheit gemeinsam in einem Gehäuse vorgesehen sind. As electrical feed pumps for conveying fuel in a fuel injection system, such as in a common rail system, on the one hand wing and roller cell pumps and internal or external gear pumps are used, which are axially flanged to a motor shaft and the drive motors both DC or as On the other hand, in the prior art so-called integrated designs are known in which the conveying and driving units are not provided separately from each other, but rather as a non-separable unit are provided together in a housing.
Eine integrierte Bauform ist beispielsweise in DE 10 2006 007 554 A1 beschrieben, wobei die Förderpumpe in einen Elektromotor integriert ist. Die Förderpum- pe umfasst ein erstes Zahnrad und ein zweites Zahnrad. Zwischen den beidenAn integrated design is described for example in DE 10 2006 007 554 A1, wherein the feed pump is integrated in an electric motor. The delivery pump comprises a first gear and a second gear. Between the two
Zahnrädern bildet sich ein Förderraum aus. Das zweite Zahnrad lagert in seiner Mitte auf einem Dorn. Das erste Zahnrad ist ein Außenzahnrad und bildet den Rotor, das zweite Zahnrad ist ein Innenzahnrad, welches im außermittigen Zentrum des ersten Zahnrads mitgeschleppt wird. Das erste Zahnrad umfasst einge- klebte Permanentmagnete, die über den Umfang verteilt angeordnet sind. Äuße- re Magnetfelderzeuger erzeugen ein umlaufendes, sich rotatorisch änderndes Feld, welches das direkte motorische Folgen des Rotors hervorruft. Gears form a delivery room. The second gear is stored in its center on a thorn. The first gear is an external gear and forms the rotor, the second gear is an internal gear, which is entrained in the eccentric center of the first gear. The first gear comprises embedded permanent magnets which are distributed over the circumference. Äuße- Magnetic field generators generate a rotating, rotating field that causes the direct motor consequences of the rotor.
Eine weitere elektrisch angetriebene Innenzahnradpumpe der integrierten Bauform ist auch aus DE 10 2006 037 177 A1 bekannt. Die dort beschriebene Innenzahnradpumpe weist einen innenverzahnten Zahnring und ein außenverzahntes Ritzel auf, das zur Erzeugung einer Förderwirkung im Zahnring kämmt, wobei das Ritzel exzentrisch zum Zahnring auf einem Lagerzapfen drehbar gelagert ist. Die Anordnung des Zahnrings und des Ritzels ist in einem Gehäuse aufgenommen, wobei im Gehäuse ein elektrisch kommutierter Stator angeordnet ist, welcher sich konzentrisch um den Zahnring herum erstreckt und nach Art eines Elektromotors mit einem Magnetring zusammenwirkt, welcher den Zahnring konzentrisch umschließt und mit diesem drehfest verbunden ist. Der Magnetring führt dabei mit dem Zahnring zur Erzeugung der Förderwirkung eine Rotationsbewegung aus. Another electrically driven internal gear pump of the integrated design is also known from DE 10 2006 037 177 A1. The internal gear pump described therein has an internally toothed ring gear and an externally toothed pinion, which meshes to produce a conveying effect in the toothed ring, wherein the pinion is rotatably mounted eccentrically to the toothed ring on a bearing journal. The arrangement of the toothed ring and the pinion is accommodated in a housing, wherein an electrically commutated stator is arranged in the housing, which extends concentrically around the toothed ring and cooperates in the manner of an electric motor with a magnetic ring which concentrically surrounds the toothed ring and rotatably with this connected is. The magnetic ring performs with the toothed ring to generate the conveying effect of a rotational movement.
Diese im Stand der Technik bekannten Varianten werden in der Regel direkt an eine Hochdruckpumpe des Kraftstoffeinspritzsystems oder stromaufwärts der Hochdruckpumpe zwischen Kraftstofftank und Hochdruckpumpe angeordnet, was zusätzlichen Bauraum erfordert. These known in the art variants are usually placed directly on a high pressure pump of the fuel injection system or upstream of the high pressure pump between the fuel tank and the high pressure pump, which requires additional space.
Daher ist es erforderlich, eine platzsparende Lösung zur Anordnung und Positionierung einer elektrischen Förderpumpe zum Fördern von Kraftstoff in einem Kraftstoffeinspritzsystem zu schaffen. Therefore, it is necessary to provide a space-saving solution for arranging and positioning an electric feed pump for delivering fuel in a fuel injection system.
Offenbarung der Erfindung Disclosure of the invention
Vorteile der Erfindung Advantages of the invention
Erfindungsgemäß wird ein Kraftstoffeinspritzsystem einer Brennkraftmaschine, insbesondere Common-Rail-System, vorgesehen, welches eine elektrische Förderpumpe zum Fördern eines fluidförmigen Mediums, insbesondere zum Fördern von Kraftstoff in dem Kraftstoffeinspritzsystem, aufweist, wobei die elektrische Förderpumpe eine Antriebsanordnung mit einem elektronisch kommutierten Motor und eine Pumpenanordnung aufweist, welche eine integrale Einheit bilden, wobei die elektrische Förderpumpe angepasst ist, um in einer Tankeinbaueinheit, welche in einen Kraftstofftank des Kraftstoffeinspritzsystems einbaubar ist, angeordnet zu sein. Durch die axial sehr kompakte Bauform der elektrischen Förderpumpe des integrierten Typs, bei dem die Antriebsanordnung und die Pumpenanordnung eine integrale Einheit bilden, kann diese problemlos in einen Kraftstofftank eingebaut werden, auch wenn sehr beschränkte Bauraumverhältnisse, wie beispielsweise im Falle eines Satteltanks, dort herrschen. Der Einbau der elektrischen Förderpumpe kann dabei im Vergleich zu konventionellen Kraftstoffpumpen, die eine entsprechend lange Tankeinbaueinheit und damit einen entsprechend tiefen Tank erfordern, in eine kleinere, niedrigere und bezügliche ihrer Anforderungen optimierte Tankbaueinheit erfolgen. Durch den Einbau der elektrischen Förderpumpe der integrierten Bauweise im Kraftstofftank ergeben sich neben der Platzersparnis auch weitere Vorteile. So kann beispielsweise durch die axial kürzere Bauform der elektrischen Förderpumpe und damit auch die insgesamt kürzere Tankeinbaueinheit diese im Kraftstofftank derartig positioniert werden, dass auf eine Tankstrahlpumpe bzw. eine Saugleitung zu einer Venturidüse nach der Kraftstoffpumpe verzichtet werden kann. Außerdem ist die elektronische Kommutierung der elektrischen Förderpumpe vorteilhaft, da durch den Wegfall der mechanischen Kommutierungselemente eine wesentlich höhere Lebensdauer erreicht wird. Außerdem ist die elektrische Förderpumpe gegenüber Vibrationen und anderen Umgebungseinflüssen unempfindlicher. According to the invention, a fuel injection system of an internal combustion engine, in particular common rail system, is provided, which has an electric feed pump for conveying a fluid medium, in particular for conveying fuel in the fuel injection system, wherein the electric feed pump has a drive arrangement with an electronically commutated motor and a Pump assembly, which form an integral unit, wherein the electric feed pump is adapted to be located in a tank mounting unit which is mountable in a fuel tank of the fuel injection system. The axially very compact design of the electric feed pump of the integrated type, in which the drive assembly and the pump assembly form an integral unit, this can be easily installed in a fuel tank, even if very limited space conditions, such as in the case of a saddle tank prevail there. The installation of the electrical delivery pump can be done in comparison to conventional fuel pumps, which require a correspondingly long tank installation unit and thus a correspondingly deep tank, in a smaller, lower and related to their requirements optimized Tankbaueinheit. The installation of the electric pump of the integrated design in the fuel tank results in addition to the space savings and other benefits. Thus, for example, by the axially shorter design of the electric pump and thus the total shorter tank installation unit these are positioned in the fuel tank such that can be dispensed with a tank jet pump or a suction line to a venturi after the fuel pump. In addition, the electronic commutation of the electric feed pump is advantageous because a significantly longer life is achieved by eliminating the mechanical commutation. In addition, the electric pump is less sensitive to vibration and other environmental influences.
Gemäß einer bevorzugten Ausführungsform ist die elektrische Förderpumpe mechanisch in oder an der Tankeinbaueinheit fixierbar, insbesondere mittels einer Snap-in Verbindung oder mittels Schrauben. Dies ermöglicht eine schnelle und kostengünstige Montage. According to a preferred embodiment, the electric feed pump is mechanically fixable in or on the tank installation unit, in particular by means of a snap-in connection or by means of screws. This allows fast and cost-effective installation.
Gemäß noch einer bevorzugten Ausführungsform ist die elektrische Förderpumpe angepasst, um lose in der Tankeinbaueinheit angeordnet zu sein. According to yet another preferred embodiment, the electric feed pump is adapted to be loosely disposed in the tank installation unit.
Gemäß noch einer weiteren bevorzugten Ausführungsform ist saugseitig der elektrischen Förderpumpe ein Filter angeordnet. According to yet another preferred embodiment, a filter is arranged on the suction side of the electric feed pump.
Vorzugsweise ist der Filter durch eine intelligente Steuerung spülb; Preferably, the filter is flushed by an intelligent controller;
lassen sich die Filterwartungsintervalle vorteilhaft verlängern. Besonders bevorzugt ist es darüber hinaus, wenn die elektrische Kraftstoffpumpe zumindest ein integriertes Heizelement aufweist. So lassen sich Paraffinausscheidungen im Dieselkraftstoff direkt in der Tankeinbaueinheit„auftauen" bzw. auflösen, ohne das Erfordernis hierfür den gesamten Kraftstofftank aufheizen zu müssen. Es werden keine Paraffine in das Niederdrucksystem gepumpt, was denThe filter maintenance intervals can be advantageously extended. Moreover, it is particularly preferred if the electric fuel pump has at least one integrated heating element. Thus, paraffin precipitates in the diesel fuel can be "thawed" or dissolved directly in the tank installation unit without the need to heat up the entire fuel tank
Einbau von zusätzlichen Filterelementen vermeidet und somit weiterhin Kosten einspart. Installation of additional filter elements avoids and thus continues to save costs.
Gemäß noch einer bevorzugten Ausführungsform ist die elektrische Förderpum- pe als Innenzahnradpumpe ausgebildet. According to yet another preferred embodiment, the electrical delivery pump is designed as an internal gear pump.
Vorzugsweise weist der elektronisch kommutierte Motor einen Rotor und einen Stator auf, wobei der Rotor direkt in dem Stator gleitgelagert ist. Gemäß der Erfindung wird außerdem eine Tankeinbaueinheit für ein Kraftstoff- einspritzsystem einer Brennkraftmaschine, insbesondere für ein Common-Rail- System, vorgesehen, wobei in oder an der Tankeinbaueinheit eine elektrische Förderpumpe zum Fördern eines fluidförmigen Mediums, insbesondere zum Fördern von Kraftstoff in dem Kraftstoffeinspritzsystem, angeordnet ist, wobei die elektrische Förderpumpe eine Antriebsanordnung mit einem elektronisch kom- mutierten Motor und eine Pumpenanordnung aufweist, welche eine integrale Einheit bilden. Die erfindungsgemäße Tankeinbaueinheit mit einer elektrischen Förderpumpe der integrierten Bauweise lässt sich besonders platzsparend direkt in einen Kraftstofftank eines Kraftstoffeinspritzsystems, wie oben bereits ausge- führt, einbauen. Preferably, the electronically commutated motor has a rotor and a stator, the rotor being slide-mounted directly in the stator. According to the invention, there is also provided a tank installation unit for a fuel injection system of an internal combustion engine, in particular for a common rail system, wherein in or on the tank installation unit an electric delivery pump for delivering a fluid medium, in particular for delivering fuel in the fuel injection system, is arranged, wherein the electric feed pump has a drive arrangement with an electronically mutated engine and a pump assembly, which form an integral unit. The tank installation unit according to the invention with an electric delivery pump of the integrated design can be installed in a particularly space-saving manner directly into a fuel tank of a fuel injection system, as already explained above.
Gemäß einer bevorzugten Ausführungsform ist die elektrische Förderpumpe mittels einer Snap-in Verbindung oder mittels Schrauben in oder an der Tankeinbaueinheit fixiert. Dies ermöglicht eine einfache, schnelle und kostengünstige Montage. According to a preferred embodiment, the electric feed pump is fixed by means of a snap-in connection or by means of screws in or on the tank installation unit. This allows a simple, fast and inexpensive installation.
Kurze Beschreibung der Zeichnungen Im Nachfolgenden werden Ausführungsbeispiele der Erfindung unter Bezugnahme auf die beigefügten Zeichnungen näher beschrieben. Es zeigt: Fig. 1 eine schematische Darstellung eines Kraftstoffeinspritzsystems gemäß dem Stand der Technik, BRIEF DESCRIPTION OF THE DRAWINGS Hereinafter, embodiments of the invention will be described in detail with reference to the accompanying drawings. It shows: 1 is a schematic representation of a fuel injection system according to the prior art,
Fig. 2 eine Schnittansicht durch einen Kraftstofftank eines Kraftstoffeinspritzsystems gemäß dem Stand der Technik; Fig. 2 is a sectional view through a fuel tank of a fuel injection system according to the prior art;
Fig. 3 eine Schnittansicht durch einen Kraftstofftank eines Kraftstoffeinspritzsystems gemäß einer Ausführungsform; und 3 is a sectional view through a fuel tank of a fuel injection system according to an embodiment; and
Fig. 4A, 4B eine schematische Darstellung einer Fixiermöglichkeit einer elektrischen Förderpumpe in einer Tankeinbaueinheit gemäß einer Ausführungsform. 4A, 4B is a schematic representation of a fixing possibility of an electric feed pump in a tank installation unit according to an embodiment.
Ausführungsformen der Erfindung Embodiments of the invention
In Fig. 1 ist eine schematische Darstellung eines Kraftstoffeinspritzsystems 1 gemäß dem Stand der Technik gezeigt. Aus einem Kraftstofftank 5 wird mittels einer elektrischen Förderpumpe 2, die eine große axiale Länge aufweist, über eine Verbindungsleitung 3 Kraftstoff zu einer Hochdruckpumpe 4 gefördert. In der Verbindungsleitung 3 ist ein Überströmventil 6 angeordnet. Der Kraftstofftank 5, die elektrische Förderpumpe 2 und die Verbindungsleitung 3 sind mit Niederdruck beaufschlagt und gehören daher zu einem Niederdruckbereich des Kraftstoffeinspritzsystems 1. In Fig. 1 is a schematic representation of a fuel injection system 1 according to the prior art shown. From a fuel tank 5 is conveyed by means of an electric feed pump 2, which has a large axial length, via a connecting line 3 fuel to a high-pressure pump 4. In the connecting line 3, an overflow valve 6 is arranged. The fuel tank 5, the electric feed pump 2 and the connecting line 3 are subjected to low pressure and therefore belong to a low-pressure region of the fuel injection system 1.
An der Hochdruckpumpe 4 ist ein Druckregelventil 8 angebracht, das über eine Leitung 9 an den Kraftstofftank 5 angeschlossen ist. Außerdem geht von der Hochdruckpumpe 4 eine Hochdruckleitung 10 aus, die den mit Hochdruck beaufschlagten Kraftstoff zu einem Hochdruckspeicher 12 liefert, der auch als Com- mon-Rail bezeichnet wird. Von dem Hochdruckspeicher 12 gehen unter Zwischenschaltung von Durchflussbegrenzern 13 Hochdruckleitungen 14 aus, die den mit Hochdruck beaufschlagten Kraftstoff aus dem Hochdruckspeicher 12 zu Einspritzventilen 15 liefern, wovon in der Figur lediglich ein Einspritzventil 15 aus Gründen der Übersichtlichkeit dargestellt ist. Die Hochdruckleitung 10, der Hochdruckspeicher 12, die Hochdruckleitung 14 und das Einspritzventil 15 enthalten mit Hochdruck beaufschlagten Kraftstoff und werden demzufolge dem Hochdruckbereich des Kraftstoffeinspritzsystems 1 zugeordnet. At the high pressure pump 4, a pressure control valve 8 is attached, which is connected via a line 9 to the fuel tank 5. In addition, starting from the high-pressure pump 4 is a high-pressure line 10, which delivers the high-pressure fuel to a high-pressure accumulator 12, which is also referred to as a common rail. From the high-pressure accumulator 12 go through the flow restrictor 13 high pressure lines 14, which deliver the high-pressure fuel from the high pressure accumulator 12 to injectors 15, of which in the figure, only one injection valve 15 is shown for reasons of clarity. The high-pressure line 10, the high-pressure accumulator 12, the high-pressure line 14 and the injection valve 15 contain high-pressure fuel and are therefore assigned to the high-pressure region of the fuel injection system 1.
Von dem Kraftstoffeinspritzventil 15 führt eine Rücklaufleitung, die einen ersten Abschnitt 16 und einen zweiten Abschnitt 17 aufweist, zu dem Kraftstofftank 5. Zwischen den ersten und zweiten Abschnitten 16, 17 der Rücklaufleitung ist ein Druckhalteventil 18 geschaltet. Das Druckhalteventil 18 dient dazu in dem ersten Abschnitt 16 der Rücklaufleitung einen Mindestdruck von etwa 10 bar aufrechtzuerhalten, der unabhängig vom Betriebszustand des Kraftstoffeinspritzsystems 1 ein Befüllen eines Kopplungsraums zwischen Piezoaktor (nicht gezeigt) und einem Steuerventilglied (nicht gezeigt) in dem Kraftstoffeinspritzsystem 1 ermöglicht. Der Betrieb des Kraftstoffeinspritzsystems 1 wird durch ein elektronisches Steuergerät 1 1 gesteuert. An dem Hochdruckspeicher 12 ist ein Druckbegrenzungsventil 7 vorgesehen, das mit der Rücklaufleitung in Verbindung steht. Wenn der Druck in dem Hochdruckspeicher 12 einen vorgegebenen maximalen Wert überschreitet, dann öffnet das Druckbegrenzungsventil 7 und der Überdruck in dem Hochdruckspeicher 12 wird in den Niederdruckbereich abgebaut. From the fuel injection valve 15, a return line having a first portion 16 and a second portion 17 leads to the fuel tank 5. Between the first and second portions 16, 17 of the return line, a pressure-holding valve 18 is connected. The pressure-maintaining valve 18 serves to maintain a minimum pressure of about 10 bar in the first section 16 of the return line, which allows filling of a coupling space between the piezoelectric actuator (not shown) and a control valve member (not shown) in the fuel injection system 1, irrespective of the operating state of the fuel injection system 1. The operation of the fuel injection system 1 is controlled by an electronic control unit 11. At the high-pressure accumulator 12, a pressure limiting valve 7 is provided, which communicates with the return line. When the pressure in the high-pressure accumulator 12 exceeds a predetermined maximum value, the pressure relief valve 7 opens and the overpressure in the high-pressure accumulator 12 is reduced to the low-pressure range.
In Fig. 2 ist eine Schnittansicht durch einen Kraftstofftank 5 gemäß dem Stand der Technik. In dem Kraftstofftank 5 ist Diesel-Kraftstoff 19 enthalten. Weiterhin ist in dem Kraftstofftank 5 eine Tankeinbaueinheit 20 angeordnet, in welcher eine elektrische Förderpumpe 2 mit einer großen axialen Länge vorgesehen ist. Bedingt durch die große axiale Länge der elektrischen Förderpumpe 2 ist eine Positionierung der ebenfalls eine große axiale Länge aufweisenden Tankeinbaueinheit 20 auf wenige Positionen im Kraftstofftank 5 beschränkt, die eine entsprechende axiale Länge aufweisen. Bei der hier gezeigten Anordnung gemäß dem Stand der Technik ist es darüber hinaus erforderlich, eine Tankstrahlpumpe 21 im Kraftstofftank 5 anzuordnen. Fig. 3 ist eine Schnittansicht durch einen Kraftstofftank 5 gemäß einer Ausführungsform. Die elektrische Förderpumpe 2 ist eine Pumpe der integrierten Bauform, bei der eine Antriebsanordnung 22 mit einem elektronisch kommutierten Motor (nicht dargestellt) und eine Pumpenanordnung 23 eine integrale Einheit 24 bilden, wie hier lediglich schematisch angedeutet ist. Durch die hierbei axial sehr kompakte Bauform der elektrischen Förderpumpe 2, was eine entsprechend kompakte Tankeinbaueinheit 20 ermöglicht, kann diese in Kraftstofftanks mit sehr beschränkten Einbaumöglichkeiten angeordnet werden. Auch ist hierdurch eine Anordnung der Tankeinbaueinheit 20 an nahezu jeglicher Position in dem Kraftstofftank 5 möglich, so dass das Erfordernis des Vorsehens einer zusätzlichen Tankstrahlpumpe entfällt. Es sei angemerkt, dass die elektronische Kommutie- rung Ströme mit hoher Frequenz bedingt, die eine schlechte elektromagnetischeIn Fig. 2 is a sectional view through a fuel tank 5 according to the prior art. In the fuel tank 5, diesel fuel 19 is contained. Furthermore, in the fuel tank 5, a tank installation unit 20 is arranged, in which an electric feed pump 2 having a large axial length is provided. Due to the large axial length of the electric feed pump 2, positioning of the tank installation unit 20, which likewise has a large axial length, is limited to a few positions in the fuel tank 5, which have a corresponding axial length. In the arrangement according to the prior art shown here, it is also necessary to arrange a tank jet pump 21 in the fuel tank 5. 3 is a sectional view through a fuel tank 5 according to an embodiment. The electric feed pump 2 is a pump of the integrated design, in which a drive assembly 22 with an electronically commutated motor (not shown) and a pump assembly 23 form an integral unit 24, as here only schematically indicated. By doing this axially very compact design of the electric feed pump 2, which allows a correspondingly compact tank installation unit 20, this can in fuel tanks with very limited installation options are arranged. This also makes it possible to arrange the tank installation unit 20 at almost any position in the fuel tank 5, so that the requirement of providing an additional tank jet pump is eliminated. It should be noted that electronic commutation involves high frequency currents that are poor electromagnetic
Verträglichkeit bzw. eine aufwändige Abschirmung der Leitungen mit sich bringt. Daher sollten die leistungsführenden Leitungen von der Leistungselektronik zur Antriebsanordnung 22 möglichst kurz gehalten werden Compatibility and a costly shielding of the lines brings with it. Therefore, the power lines from the power electronics to the drive assembly 22 should be kept as short as possible
Fig. 4A und 4B zeigen eine schematische Darstellung einer Fixiermöglichkeit einer elektrischen Förderpumpe 2 in einer Tankeinbaueinheit 20 gemäß einer Ausführungsform. Die Fixierung der elektrischen Förderpumpe 2 wird hierbei auf einfache und schnelle Weise durch eine sogenannte Snap-in Verbindung 25, 25' erzielt, welche die elektrische Förderpumpe 2 sicher in der Tankeinbaueinheit 20 hält (Fig. 4B). Bei der Montage wird die elektrische Förderpumpe 2 einfach zwischen die jeweiligen elastischen Klemmelemente 26, 26' der Snap-in Verbindung 25, 25' geschoben, die dabei elastisch nach außen nachgeben (Fig. 4A). Hat die elektrische Förderpumpe 2 ihre endgültige Position in der Tankeinbaueinheit 20 erreicht, nehmen die elastischen Klemmelemente 26, 26' ihre ursprüngliche Position wieder ein und umschließen mit jeweiligen Rastnasen 27, 27' eine Oberseite 28 eines Gehäuses 29 der elektrischen Förderpumpe 2 (Fig. 4B). 4A and 4B show a schematic representation of a possibility of fixing an electric feed pump 2 in a tank installation unit 20 according to an embodiment. The fixation of the electric feed pump 2 is in this case achieved in a simple and fast manner by a so-called snap-in connection 25, 25 ', which securely holds the electric feed pump 2 in the tank installation unit 20 (FIG. 4B). During assembly, the electric feed pump 2 is simply pushed between the respective elastic clamping elements 26, 26 'of the snap-in connection 25, 25', which yield elastically outwardly (FIG. 4A). When the electric feed pump 2 has reached its final position in the tank installation unit 20, the elastic clamping elements 26, 26 'resume their original position and enclose with respective detents 27, 27' an upper side 28 of a housing 29 of the electric feed pump 2 (FIG. 4B) ).
Mittels der erfindungsgemäßen Konfiguration ist somit eine schnelle und einfache Montage einer elektrischen Förderpumpe 2 an nahezu jeglicher Position in einem Kraftstofftank 5 möglich. By means of the configuration according to the invention, therefore, a quick and easy installation of an electric feed pump 2 at almost any position in a fuel tank 5 is possible.

Claims

Ansprüche Expectations
Kraftstoffeinspritzsystem (1 ) einer Brennkraftmaschine, insbesondere Com- mon-Rail-System, welches eine elektrische Förderpumpe (2) zum Fördern eines fluidförmigen Mediums, insbesondere zum Fördern von Kraftstoff (19) in dem Kraftstoffeinspritzsystem (1 ), aufweist, wobei die elektrische Förderpumpe (2) eine Antriebsanordnung (22) mit einem elektronisch kommutierten Motor und eine Pumpenanordnung (23) aufweist, welche eine integrale Einheit (24) bilden, Fuel injection system (1) of an internal combustion engine, in particular a common rail system, which has an electric feed pump (2) for pumping a fluid medium, in particular for pumping fuel (19) in the fuel injection system (1), wherein the electric feed pump (2) has a drive arrangement (22) with an electronically commutated motor and a pump arrangement (23), which form an integral unit (24),
dadurch gekennzeichnet, dass characterized in that
die elektrische Förderpumpe (2) dazu angepasst ist, in einer Tankeinbaueinheit (20), welche in einen Kraftstofftank (5) des Kraftstoffeinspritzsystems (1 ) einbaubar ist, angeordnet zu sein. the electric feed pump (2) is adapted to be arranged in a tank installation unit (20), which can be installed in a fuel tank (5) of the fuel injection system (1).
Kraftstoffeinspritzsystem (1 ) nach Anspruch 1 , Fuel injection system (1) according to claim 1,
dadurch gekennzeichnet, dass characterized in that
die elektrische Förderpumpe the electric feed pump
(2) mechanisch in oder an der Tankeinbaueinheit (20) fixiert ist, insbesondere mittels einer Snap-in Verbindung (25, 25') oder mittels Schrauben. (2) is mechanically fixed in or on the tank installation unit (20), in particular by means of a snap-in connection (25, 25 ') or by means of screws.
3. Kraftstoffeinspritzsystem nach Anspruch 1 , 3. Fuel injection system according to claim 1,
dadurch gekennzeichnet, dass characterized in that
die elektrische Förderpumpe (2) dazu angepasst ist, lose in der Tankeinbaueinheit (20) angeordnet zu sein. the electric feed pump (2) is adapted to be arranged loosely in the tank installation unit (20).
4. Kraftstoffeinspritzsystem (1 ) nach einem oder mehreren der Ansprüche 1 bis 3, 4. Fuel injection system (1) according to one or more of claims 1 to 3,
dadurch gekennzeichnet, dass characterized in that
saugseitig der elektrischen Förderpumpe (2) ein Filter angeordnet ist. A filter is arranged on the suction side of the electric feed pump (2).
Kraftstoffeinspritzsystem (1 ) nach Anspruch Fuel injection system (1) according to claim
dadurch gekennzeichnet, dass der Filter durch eine intelligente Steuerung spülbar ist. characterized in that The filter can be flushed using an intelligent control system.
6. Kraftstoffeinspritzsystem (1 ) nach einem oder mehreren der Ansprüche 1 bis6. Fuel injection system (1) according to one or more of claims 1 to
5, 5,
dadurch gekennzeichnet, dass characterized in that
die elektrische Kraftstoffpumpe (2) zumindest ein integriertes Heizelement aufweist. the electric fuel pump (2) has at least one integrated heating element.
7. Kraftstoffeinspritzsystem (1 ) nach einem oder mehreren der Ansprüche 1 bis7. Fuel injection system (1) according to one or more of claims 1 to
6, 6,
dadurch gekennzeichnet, dass characterized in that
die elektrische Förderpumpe (2) als Innenzahnradpumpe ausgebildet ist. the electric feed pump (2) is designed as an internal gear pump.
Kraftstoffeinspritzsystem (1 ) nach einem oder mehreren der Ansprüche 1 bisFuel injection system (1) according to one or more of claims 1 to
7, 7,
dadurch gekennzeichnet, dass characterized in that
der elektronisch kommutierte Motor einen Rotor und einen Stator aufweist, wobei der Rotor direkt in dem Stator gleitgelagert ist. 9. Tankeinbaueinheit (20) für ein Kraftstoffeinspritzsystem (1 ) einer Brennkraftmaschine, insbesondere für ein Common-Rail-System, the electronically commutated motor has a rotor and a stator, the rotor being slide-mounted directly in the stator. 9. Tank installation unit (20) for a fuel injection system (1) of an internal combustion engine, in particular for a common rail system,
dadurch gekennzeichnet, dass characterized in that
in oder an der Tankeinbaueinheit (20) eine elektrische Förderpumpe (2) zum Fördern eines fluidförmigen Mediums, insbesondere zum Fördern von Kraftstoff (19) in dem Kraftstoffeinspritzsystem (1 ), angeordnet ist, wobei die elektrische Förderpumpe (2) eine Antriebsanordnung (22) mit einem elektronisch kommutierten Motor und eine Pumpenanordnung (23) aufweist, welche eine integrale Einheit (24) bilden. 10. Tankeinbaueinheit (20) gemäß Anspruch 9, An electric feed pump (2) for pumping a fluid medium, in particular for pumping fuel (19) in the fuel injection system (1), is arranged in or on the tank installation unit (20), the electric feed pump (2) having a drive arrangement (22). with an electronically commutated motor and a pump arrangement (23), which form an integral unit (24). 10. Tank installation unit (20) according to claim 9,
dadurch gekennzeichnet, dass characterized in that
die elektrische Förderpumpe (2) mittels einer Snap-in Verbindung (25, 25 ) oder mittels Schrauben in oder an der Tankeinbaueinheit (20) fixierbar ist. the electric feed pump (2) can be fixed in or on the tank installation unit (20) by means of a snap-in connection (25, 25) or by means of screws.
EP12711846.1A 2011-04-20 2012-03-26 Fuel injection system and tank installation unit for a fuel injection system Withdrawn EP2699787A1 (en)

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CN103492697A (en) 2014-01-01
KR20140018931A (en) 2014-02-13

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