WO2019174815A1 - Filter element for liquid medium, and pump with filter element - Google Patents

Filter element for liquid medium, and pump with filter element Download PDF

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Publication number
WO2019174815A1
WO2019174815A1 PCT/EP2019/052620 EP2019052620W WO2019174815A1 WO 2019174815 A1 WO2019174815 A1 WO 2019174815A1 EP 2019052620 W EP2019052620 W EP 2019052620W WO 2019174815 A1 WO2019174815 A1 WO 2019174815A1
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WO
WIPO (PCT)
Prior art keywords
pump
filter
filter element
flange
carrier element
Prior art date
Application number
PCT/EP2019/052620
Other languages
German (de)
French (fr)
Inventor
Francesco Lucarelli
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 WO2019174815A1 publication Critical patent/WO2019174815A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/31—Self-supporting filtering elements
    • B01D29/35—Self-supporting filtering elements arranged for outward flow filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
    • B01D29/52—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in parallel connection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
    • B01D35/147—Bypass or safety valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
    • F02M37/44—Filters structurally associated with pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/46—Valves
    • F02M59/464—Inlet valves of the check valve type
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/27—Fuel-injection apparatus with filters
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston

Definitions

  • the invention relates to a filter element according to the preamble of claim 1 and a pump in which the filter element is used.
  • Such a filter element is known from DE 10 2015 212 160 A1.
  • This filter element is used in a high-pressure fuel pump and arranged in the inlet to an inlet valve of the high-pressure fuel pump.
  • the filter element has a carrier element and a filter body connected to it, which can be designed as a filter fabric, filter mesh or filter screen.
  • the filter element prevents contaminants in the fuel from entering the inlet valve and causing wear or leaks there.
  • the mesh size of the filter must be chosen as small as possible in order to reliably retain contaminants.
  • the carrier element has a closed flange region for its support on a counterbody.
  • the filter element according to the invention with the features of claim 1 has the advantage that a pressure equalization on both sides of the flange is made possible through the openings in the flange region of the support member, so that the pressure prevailing in the inlet region of the filter element pressure and pressure pulsations no longer lead to disturbing deformation of the support element. This extends the life of the filter element and ensures its effectiveness.
  • FIG. 1 shows a filter element in a perspective view before its installation in an installation space provided for this
  • FIG. 2 shows an enlarged detail of the filter element
  • FIG. 3 shows the filter element according to a variant of FIG. 2
  • FIG. 4 shows a detail of a pump according to
  • FIG 5 shows a detail of a pump according to a second exemplary embodiment with a built-in filter element.
  • FIGS. 1 to 5 show a filter element 10 for liquid medium, for example fuel, in particular diesel fuel.
  • the filter element 10 has an at least approximately hollow-cylindrical support element 12, which consists of rigid material, for example plastic or metal, and which has a longitudinal axis 14.
  • the support element 12 has a self-contained annular web 16 on an end region arranged in the direction of its longitudinal axis 14.
  • the carrier element 12 has a flange-like end region 18 which has a larger outer diameter than the annular web 16.
  • the flange region 18 forms a wall of the carrier element 12.
  • the annular web 16 and the flange region 18 longitudinal direction arranged distributed longitudinal webs 20 together. Between the annular web 16 and the flange region 18 and the longitudinal webs 20 are approximately rectangular openings 22 are present.
  • a filter body 24 is connected, which may be a filter screen, a filter mesh or a filter fabric.
  • the carrier element 12 may, for example, be molded onto the filter body 24 in an injection molding process.
  • the openings 22 of the support member 12 are covered and this has filter openings 26 whose size is selected according to the particular application to retain contaminants such as particles from the medium flowing through the filter element 10 and provide a sufficiently large flow cross-section.
  • the filter openings 26 of the filter body 24 have a mesh size a, which may be, for example, about 140 pm, wherein in FIG. 1, for example, a filter opening 26 is shown greatly enlarged.
  • the filter openings 26 of the filter body 24 may have an angular cross-section, the mesh width a then being the width of the filter openings 26.
  • the filter openings 26 of the filter body 24 can also have a round cross section, the mesh size a then being the diameter of the filter openings 26.
  • the filter body 24 is flowed through radially from the outside to the inside, with respect to the longitudinal axis 14, by the fuel to be filtered.
  • the flange region 18 of the carrier element 12 has an inner region 18a facing the longitudinal axis 14, which runs outward approximately radially to the longitudinal axis 14, and an outer region 18b which adjoins the inner region 18a and is approximately conical, for example starting from the inner region 18a in the direction of the longitudinal axis 14 from
  • Ring bridge 16 extended away.
  • the outer edge of the portion 18b of the flange portion 18 of the support member 12 sealingly abutting against a counter body as will be explained in more detail below with reference to Figures 4 and 5.
  • At least one opening 28 is present in the flange area 18 of the carrier element 12, with preferably several openings 28 arranged distributed over the flange area 18 being provided.
  • the openings 28 are arranged in the inner area 18a and / or in the outer area 18b of the flange area 18.
  • the cross-section d of the openings 28 is smaller than or equal to the mesh size a of the filter body 24. This prevents impurities from passing through the openings 28, bypassing the filter body 24, through the filter element 10.
  • the openings 28 have a larger cross-section d than the mesh size a of the filter body 24 and form a bypass to the filter body 24 through which the medium can pass if the filter body 24 is blocked, for example as a result of volatilization of the fuel when it comes to diesel fuel.
  • FIG. 3 shows the filter element 10 according to a variant of the embodiment of FIG. 2, in which a further filter body 30 is arranged in the flange region 18 of the carrier element 12.
  • the flange region 18 has at least one larger opening 32, which is substantially larger than the openings 28 according to FIG. 2, which is covered by the further filter body 30 analogously to the openings 22 of the carrier element 12, which are covered by the filter body 24.
  • the further filter body 30 may be designed separately from the filter body 24 or integrally with the filter body 24. By the further filter body 30, the effective filter area of the filter element 10 is increased.
  • the region within the flange region 18 is connected, like the region within the filter body 24, to the region downstream of the filter element 10.
  • FIG. 4 shows a detail of a pump 40, in particular a high-pressure fuel pump for a fuel injection device, according to a first exemplary embodiment, in which a filter element 10 designed as described above is arranged.
  • the pump 40 has at least one pump element 42 with a pump piston 44 which is driven in a lifting movement and which is tightly guided in a cylinder bore 46 of a housing part 48 of the pump 40 and defines a pump working space 50 therein.
  • the drive of the pump piston 44 takes place, for example, via a drive shaft with a cam or eccentric and a roller tappet supported on it, which are not shown in FIG.
  • the pump element 42 has an inlet valve 52, via which the pump working chamber 50 can be filled with fuel during the suction stroke of the pump piston 44.
  • the pump element 42 also has an outlet valve 54, via which fuel is displaced from the pump working chamber 50 during the delivery stroke of the pump piston 44 and is conveyed, for example, into a high-pressure accumulator 56.
  • the inlet valve 52 is designed as a non-return valve opening into the pump working chamber 50 and has a piston-shaped valve member 58, the shaft 59 of which is guided in a bore 60 in the housing part 48 adjoining the cylinder bore 46.
  • the valve member 58 has a arranged in the pump chamber 50 head 61 with a larger diameter than the shaft 59 and the head 61 at the transition to the shaft 59, a sealing surface 62 is formed.
  • a valve seat 63 is formed at the transition from the cylinder bore 46 to the bore 60, the valve member 58 cooperating with its sealing surface 62 with the valve seat 63.
  • an inlet chamber 64 surrounding the inlet valve 52 is formed, which is connected to an inlet for fuel.
  • inlet chamber 64 From the inlet chamber 64 lead in the housing part 48 from a plurality of inlet bores 66, which open into the bore 60 in front of the valve seat 63.
  • inlet valve 52 When the inlet valve 52 is open, fuel flows through the inlet bores 66 and the bore 60 into the pump working chamber 50 from the inlet chamber 64.
  • the housing part 48 of the pump 40 is, for example, cylindrically shaped in its region surrounding the inlet space 64, and a further housing part 68 is fastened to it, which is a closure element 68 sealing the inlet space 64 to the outside of the pump 40.
  • the filter element 10 is arranged, wherein radially outside the filter element 10, the Connection of the inlet chamber 64 is arranged with the inlet and radially within the filter element 10, the inlet bores 66 are arranged to the pump working chamber 50.
  • the annular web 16 of the support member 12 of the filter element 10 is supported in the direction of the longitudinal axis 14 on the housing part 48 of the pump 40.
  • the outer edge of the outer region 18b of the flange region 18 of the carrier element 12 of the filter element 10 comes into contact with the closure element 68 in the direction of the longitudinal axis 14 as a counter-body.
  • 64 pressure pulsations may occur in the inlet space, which act on the filter element 10.
  • the pressure pulsations do not lead to excessive deformations of the carrier element 12, since fuel can flow through the openings 28 in the flange region 18 and thus equalize the pressure between the inlet space 64 and the through the flange portion 18 of the support member 12 and the closure member 68 limited space is made possible.
  • FIG. 5 shows a detail of a pump 40 according to a second exemplary embodiment, the structure of which is essentially the same as in the first exemplary embodiment.
  • an electrical actuator 70 is provided, through which the inlet valve 52 can be actuated.
  • the actuator 70 is preferably an electromagnetic actuator and by means of which the inlet valve 52 can be moved into its open position.
  • the actuator 70 may, for example, have a magnet armature 71, which acts on the valve member 58 and which is displaceably guided in a carrier part 72 of the actuator 70.
  • the actuator 70 can be determined during the delivery stroke of the pump piston 44, whether the inlet valve is open or closed, whereby a change of the pump piston 44 in the high-pressure accumulator 56 för- encouraged amount of fuel is made possible.
  • the actuator 70 is attached to the housing part 48 of the pump 40, arranged above the inlet space 64 and is fixed to the housing part 48 of the pump 40.
  • a disk-shaped intermediate element 74 which forms part of the housing of the pump 40, can be arranged between the inlet space 64 and the actuator 70.
  • the intermediate element 74 may be provided, for example, to set a defined distance between the actuator 70 and the housing part 48 of the pump 40.
  • the inlet space 64 is limited to the actuator 70 out.
  • the filter element 10 is arranged, wherein radially outside the filter element 10, the connection of the inlet chamber 64 is arranged with the inlet and radially within the filter element 10, the inlet holes 66 are arranged to the pump working chamber 50.
  • the annular web 16 of the carrier element 12 of the filter element 10 is supported in the direction of the longitudinal axis 14 on the housing part 48 of the pump 40.

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

Abstract

What is proposed is a filter element (10) for liquid medium, in particular diesel fuel, which is used in particular in a high-pressure fuel pump. The filter element (10) has a carrier element (12) and at least one filter body (24) which is connected to the carrier element (12) and through which medium flows. The carrier element (12) has, at an axial end region, a flange-shaped region (18) which projects beyond the filter body (24), wherein at least one opening (28; 32) is provided in the flange-shaped region (18) of the carrier element (12). Major deformations of the carrier element (12) due to the pressure and/or pressure pulsations prevailing in the feed line to the filter element (10) are avoided by means of the at least one opening (28; 32) in the flange-shaped region (18) of the carrier element (12).

Description

Beschreibung  description
Titel: Title:
Filterelement für flüssiges Medium und Pumpe mit Filterelement  Filter element for liquid medium and pump with filter element
Die Erfindung betrifft ein Filterelement gemäß dem Oberbegriff des Anspruchs 1 sowie eine Pumpe, in der das Filterelement verwendet wird. The invention relates to a filter element according to the preamble of claim 1 and a pump in which the filter element is used.
Stand der Technik State of the art
Ein solches Filterelement ist durch die DE 10 2015 212 160 A1 bekannt. Dieses Filterelement ist in einer Kraftstoffhochdruckpumpe verwendet und im Zulauf zu einem Einlassventil der Kraftstoffhochdruckpumpe angeordnet. Das Filterelement weist ein Trägerelement und einen mit diesem verbundenen Filterkörper auf, der als Filtergewebe, Filtergeflecht oder Filtersieb ausgeführt sein kann. Durch das Filterelement wird verhindert, dass Verunreinigungen im Kraftstoff in das Einlass- ventil gelangen können und dort zu Verschleiß oder Undichtigkeiten führen. Die Maschenweite des Filters muss dabei möglichst klein gewählt werden, um Verun- reinigungen sicher zurückzuhalten. Das Trägerelement weist zu dessen Abstüt- zung an einem Gegenkörper einen geschlossenen Flanschbereich auf. In einem das Filterelement umgebenden Zulaufraum liegt ein erhöhter Zulaufdruck vor und können während des Betriebs der Kraftstoffh och d ruckpumpe Druckpulsationen auftreten, die auf das Trägerelement wirken und zu Verformungen des Trä- gerelements führen können. Insbesondere der Flanschbereich des Trägerele- ments weist eine relativ große Fläche auf, auf die die Druckpulsationen wirken und zu Verformungen führen können. Durch die Verformungen des Trägerele- ments kann dieses über eine längere Betriebsdauer der Kraftstoffhochdruckpum- pe unter Umständen brechen oder durch dessen Verformungen kann die Wirk- samkeit des Filterelements beeinträchtigt werden indem Kraftstoff unter Umge- hung des Filterkörpers unkontrolliert durch das Filterelement hindurchtritt. Offenbarung der Erfindung Vorteile der Erfindung Such a filter element is known from DE 10 2015 212 160 A1. This filter element is used in a high-pressure fuel pump and arranged in the inlet to an inlet valve of the high-pressure fuel pump. The filter element has a carrier element and a filter body connected to it, which can be designed as a filter fabric, filter mesh or filter screen. The filter element prevents contaminants in the fuel from entering the inlet valve and causing wear or leaks there. The mesh size of the filter must be chosen as small as possible in order to reliably retain contaminants. The carrier element has a closed flange region for its support on a counterbody. In an inlet space surrounding the filter element, there is an increased inlet pressure and, during the operation of the fuel high pressure pump, pressure pulsations can occur which act on the carrier element and can lead to deformations of the carrier element. In particular, the flange region of the carrier element has a relatively large area, on which the pressure pulsations act and can lead to deformations. As a result of the deformations of the carrier element, this may possibly break over a longer service life of the high-pressure fuel pump, or its deformations may impair the effectiveness of the filter element by passing fuel uncontrolled through the filter element, bypassing the filter body. Disclosure of the Invention Advantages of the Invention
Das erfindungsgemäße Filterelement mit den Merkmalen des Anspruchs 1 hat demgegenüber den Vorteil, dass durch die Öffnungen im Flanschbereich des Trägerelements ein Druckausgleich beiderseits des Flanschbereichs ermöglicht ist, so dass der im Zulaufbereich des Filterelements herrschende Druck und Druckpulsationen nicht mehr zu störenden Verformungen des Trägerelements führen. Hierdurch ist die Lebensdauer des Filterelements verlängert und dessen Wirksamkeit sichergestellt. The filter element according to the invention with the features of claim 1 has the advantage that a pressure equalization on both sides of the flange is made possible through the openings in the flange region of the support member, so that the pressure prevailing in the inlet region of the filter element pressure and pressure pulsations no longer lead to disturbing deformation of the support element. This extends the life of the filter element and ensures its effectiveness.
In den abhängigen Ansprüchen sind vorteilhafte Ausgestaltungen und Weiterbil- dungen des erfindungsgemäßen Filterelements angegeben. Durch die Ausbil- dung gemäß Anspruch 3 ist ein Bypass zum Filterkörper ermöglicht falls dieser infolge Versulzung von Kraftstoff verstopft ist. Durch die Ausbildung gemäß An- spruch 4 ist sichergestellt, dass durch den Bypass keine Verunreinigungen durch das Filterelement hindurchgelangen können. Durch die Ausbildung gemäß An- spruch 5 ist die wirksame Fläche des Filterelements vergrößert. Durch die Aus- bildung gemäß den Ansprüchen 6 bis 10 kann das Filterelement auf einfache Weise in das Gehäuse der Pumpe integriert werden. In the dependent claims advantageous embodiments and further developments of the filter element according to the invention are given. By training according to claim 3, a bypass to the filter body is made possible if this is clogged due Verulzung of fuel. The embodiment according to claim 4 ensures that no impurities can pass through the filter element as a result of the bypass. The construction according to claim 5, the effective area of the filter element is increased. Due to the embodiment according to claims 6 to 10, the filter element can be easily integrated into the housing of the pump.
Zeichnung drawing
Mehrere Ausführungsbeispiele der Erfindung werden nachfolgend anhand der beigefügten Zeichnung näher beschrieben. Es zeigen Figur 1 ein Filterelement in perspektivischer Darstellung vor dessen Einbau in einem für dieses vorgesehe- nen Einbauraum, Figur 2 in vergrößerter Darstellung ausschnittsweise das Fil- terelement, Figur 3 das Filterelement gemäß einer Variante zu Figur 2, Figur 4 ausschnittsweise eine Pumpe gemäß einem ersten Ausführungsbeispiel mit ein- gebautem Filterelement und Figur 5 ausschnittsweise eine Pumpe gemäß einem zweiten Ausführungsbeispiel mit eingebautem Filterelement. Beschreibung der Ausführungsbeispiele Several embodiments of the invention are described below with reference to the accompanying drawings. 1 shows a filter element in a perspective view before its installation in an installation space provided for this, FIG. 2 shows an enlarged detail of the filter element, FIG. 3 shows the filter element according to a variant of FIG. 2, FIG. 4 shows a detail of a pump according to FIG 5 shows a detail of a pump according to a second exemplary embodiment with a built-in filter element. Description of the embodiments
In den Figuren 1 bis 5 ist ein Filterelement 10 für flüssiges Medium, beispielswei- se Kraftstoff, insbesondere Dieselkraftstoff, dargestellt. Das Filterelement 10 weist ein zumindest annähernd hohlzylinderförmiges Trägerelement 12 auf, das aus steifem Material besteht, beispielsweise Kunststoff oder Metall besteht, und das eine Längsachse 14 aufweist. Das Trägerelement 12 weist wie in Figur 1 dargestellt an einem in Richtung von dessen Längsachse 14 angeordneten End- bereich einen in sich geschlossenen Ringsteg 16 auf. Am in axialer Richtung entgegengesetzten Endbereich weist das Trägerelement 12 einen flanschartigen Endbereich 18 auf, der einen größeren Außendurchmesser aufweist als der Ringsteg 16. Der Flanschbereich 18 bildet eine Wandung des Trägerelements 12. Der Ringsteg 16 und der Flanschbereich 18 sind über mehrere in deren Um- fangsrichtung verteilt angeordnete Längsstege 20 miteinander verbunden. Zwi- schen dem Ringsteg 16 und dem Flanschbereich 18 sowie den Längsstegen 20 sind etwa rechteckförmige Öffnungen 22 vorhanden. FIGS. 1 to 5 show a filter element 10 for liquid medium, for example fuel, in particular diesel fuel. The filter element 10 has an at least approximately hollow-cylindrical support element 12, which consists of rigid material, for example plastic or metal, and which has a longitudinal axis 14. As is shown in FIG. 1, the support element 12 has a self-contained annular web 16 on an end region arranged in the direction of its longitudinal axis 14. At the end region which is opposite in the axial direction, the carrier element 12 has a flange-like end region 18 which has a larger outer diameter than the annular web 16. The flange region 18 forms a wall of the carrier element 12. The annular web 16 and the flange region 18 longitudinal direction arranged distributed longitudinal webs 20 together. Between the annular web 16 and the flange region 18 and the longitudinal webs 20 are approximately rectangular openings 22 are present.
Mit dem Trägerelement 12 ist ein Filterkörper 24 verbunden, der ein Filtersieb, ein Filtergeflecht oder ein Filtergewebe sein kann. Das Trägerelement 12 kann beispielsweise an den Filterkörper 24 in einem Spritzgießprozess angespritzt sein. Durch den Filterkörper 24 werden die Öffnungen 22 des Trägerelements 12 überdeckt und dieser weist Filteröffnungen 26 auf, deren Größe entsprechend dem jeweiligen Anwendungsfall gewählt ist, um Verunreinigungen wie Partikel aus dem das Filterelement 10 durchströmenden Medium zurückzuhalten und ei- nen ausreichend großen Strömungsquerschnitt bereitzustellen. Die Filteröffnun- gen 26 des Filterkörpers 24 weisen eine Maschenweite a auf, die beispielsweise etwa 140 pm betragen kann, wobei in Figur 1 beispielhaft eine Filteröffnung 26 stark vergrößert dargestellt ist. Die Filteröffnungen 26 des Filterkörpers 24 kön- nen einen eckigen Querschnitt aufweisen, wobei die Maschenweite a dann die Breite der Filteröffnungen 26 ist. Die Filteröffnungen 26 des Filterkörpers 24 kön- nen auch einen runden Querschnitt aufweisen, wobei die Maschenweite a dann der Durchmesser der Filteröffnungen 26 ist. Der Filterkörper 24 wird radial be- züglich der Längsachse 14 von außen nach innen vom zu filternden Kraftstoff durchströmt. Der Flanschbereich 18 des Trägerelements 12 weist einen der Längsachse 14 zugewandten inneren Bereich 18a auf, der etwa radial zur Längsachse 14 nach außen verläuft, und einen sich an den inneren Bereich 18a anschließenden äu- ßeren Bereich 18b, der beispielsweise etwa konisch ausgebildet ist und der sich ausgehend vom inneren Bereich 18a in Richtung der Längsachse 14 vom With the support member 12, a filter body 24 is connected, which may be a filter screen, a filter mesh or a filter fabric. The carrier element 12 may, for example, be molded onto the filter body 24 in an injection molding process. Through the filter body 24, the openings 22 of the support member 12 are covered and this has filter openings 26 whose size is selected according to the particular application to retain contaminants such as particles from the medium flowing through the filter element 10 and provide a sufficiently large flow cross-section. The filter openings 26 of the filter body 24 have a mesh size a, which may be, for example, about 140 pm, wherein in FIG. 1, for example, a filter opening 26 is shown greatly enlarged. The filter openings 26 of the filter body 24 may have an angular cross-section, the mesh width a then being the width of the filter openings 26. The filter openings 26 of the filter body 24 can also have a round cross section, the mesh size a then being the diameter of the filter openings 26. The filter body 24 is flowed through radially from the outside to the inside, with respect to the longitudinal axis 14, by the fuel to be filtered. The flange region 18 of the carrier element 12 has an inner region 18a facing the longitudinal axis 14, which runs outward approximately radially to the longitudinal axis 14, and an outer region 18b which adjoins the inner region 18a and is approximately conical, for example starting from the inner region 18a in the direction of the longitudinal axis 14 from
Ringsteg 16 weg erweitert. In eingebautem Zustand des Filterelements 10 kommt dieses mit dem äußeren Rand des Bereichs 18b des Flanschbereichs 18 des Trägerelements 12 dichtend an einem Gegenkörper zur Anlage wie nachfolgend unter Bezug zu den Figuren 4 und 5 noch näher erläutert wird. Ring bridge 16 extended away. In the installed state of the filter element 10 comes this with the outer edge of the portion 18b of the flange portion 18 of the support member 12 sealingly abutting against a counter body as will be explained in more detail below with reference to Figures 4 and 5.
Erfindungsgemäß ist vorgesehen, dass im Flanschbereich 18 des Trägerele- ments 12 wenigstens eine Öffnung 28 vorhanden ist, wobei vorzugsweise mehre- re über den Flanschbereich 18 verteilt angeordnete Öffnungen 28 vorgesehen sind. Die Öffnungen 28 sind im inneren Bereich 18a und/oder im äußeren Be- reich 18b des Flanschbereichs 18 angeordnet. Vorzugsweise ist der Querschnitt d der Öffnungen 28 kleiner oder gleich der Maschenweite a des Filterkörpers 24. Hierdurch wird verhindert, dass Verunreinigungen durch die Öffnungen 28 unter Umgehung des Filterkörpers 24 durch das Filterelement 10 hindurchtreten kön- nen. Alternativ kann auch vorgesehen sein, dass die Öffnungen 28 einen größe- ren Querschnitt d als die Maschenweite a des Filterkörpers 24 aufweisen und gezielt einen Bypass zum Filterkörper 24 bilden, durch den Medium hindurchtre- ten kann wenn der Filterkörper 24 verstopft ist, beispielsweise infolge Versulzung des Kraftstoffs wenn es sich um Dieselkraftstoff handelt. It is provided according to the invention that at least one opening 28 is present in the flange area 18 of the carrier element 12, with preferably several openings 28 arranged distributed over the flange area 18 being provided. The openings 28 are arranged in the inner area 18a and / or in the outer area 18b of the flange area 18. Preferably, the cross-section d of the openings 28 is smaller than or equal to the mesh size a of the filter body 24. This prevents impurities from passing through the openings 28, bypassing the filter body 24, through the filter element 10. Alternatively, it can also be provided that the openings 28 have a larger cross-section d than the mesh size a of the filter body 24 and form a bypass to the filter body 24 through which the medium can pass if the filter body 24 is blocked, for example as a result of volatilization of the fuel when it comes to diesel fuel.
In Figur 3 ist das Filterelement 10 gemäß einer Variante zu der Ausführung von Figur 2 dargestellt, bei der im Flanschbereich 18 der Trägerelements 12 ein wei- terer Filterkörper 30 angeordnet ist. Der Flanschbereich 18 weist dabei wenigs- tens eine gegenüber den Öffnungen 28 gemäß Figur 2 wesentliche größere Öff nung 32 auf, die vom weiteren Filterkörper 30 überdeckt wird analog zu den Öff nungen 22 des Trägerelements 12, die vom Filterkörper 24 überdeckt werden. Der weitere Filterkörper 30 kann separat zum Filterkörper 24 oder einstückig mit dem Filterkörper 24 ausgeführt sein. Durch den weiteren Filterkörper 30 wird die wirksame Filterfläche des Filterelements 10 vergrößert. Der Bereich innerhalb des Flanschbereichs 18 ist dabei wie der Bereich innerhalb des Filterkörpers 24 mit dem Bereich stromabwärts des Filterelements 10 verbunden. In Figur 4 ist ausschnittsweise eine Pumpe 40, insbesondere eine Kraftstoff- hochdruckpumpe für eine Kraftstoffeinspritzeinrichtung, gemäß einem ersten Ausführungsbeispiel dargestellt, in der ein wie vorstehend ausgebildetes Fil- terelement 10 angeordnet ist. Die Pumpe 40 weist wenigstens ein Pumpenele- ment 42 auf mit einem in einer Hubbewegung angetriebenen Pumpenkolben 44, der in einer Zylinderbohrung 46 eines Gehäuseteils 48 der Pumpe 40 dicht ge- führt ist und in dieser einen Pumpenarbeitsraum 50 begrenzt. Der Antrieb des Pumpenkolbens 44 erfolgt beispielsweise über eine Antriebswelle mit einem No- cken oder Exzenter und einem sich an diesem abstützenden Rollenstößel, die in Figur 4 nicht dargestellt sind. Das Pumpenelement 42 weist ein Einlassventil 52 auf, über das der Pumpenarbeitsraum 50 beim Saughub des Pumpenkolbens 44 mit Kraftstoff befüllbar ist. Das Pumpenelement 42 weist außerdem ein Auslass- ventil 54 auf, über das beim Förderhub des Pumpenkolbens 44 Kraftstoff aus dem Pumpenarbeitsraum 50 verdrängt wird und beispielsweise in einen Hoch- druckspeicher 56 gefördert wird. FIG. 3 shows the filter element 10 according to a variant of the embodiment of FIG. 2, in which a further filter body 30 is arranged in the flange region 18 of the carrier element 12. At the same time, the flange region 18 has at least one larger opening 32, which is substantially larger than the openings 28 according to FIG. 2, which is covered by the further filter body 30 analogously to the openings 22 of the carrier element 12, which are covered by the filter body 24. The further filter body 30 may be designed separately from the filter body 24 or integrally with the filter body 24. By the further filter body 30, the effective filter area of the filter element 10 is increased. The region within the flange region 18 is connected, like the region within the filter body 24, to the region downstream of the filter element 10. FIG. 4 shows a detail of a pump 40, in particular a high-pressure fuel pump for a fuel injection device, according to a first exemplary embodiment, in which a filter element 10 designed as described above is arranged. The pump 40 has at least one pump element 42 with a pump piston 44 which is driven in a lifting movement and which is tightly guided in a cylinder bore 46 of a housing part 48 of the pump 40 and defines a pump working space 50 therein. The drive of the pump piston 44 takes place, for example, via a drive shaft with a cam or eccentric and a roller tappet supported on it, which are not shown in FIG. The pump element 42 has an inlet valve 52, via which the pump working chamber 50 can be filled with fuel during the suction stroke of the pump piston 44. The pump element 42 also has an outlet valve 54, via which fuel is displaced from the pump working chamber 50 during the delivery stroke of the pump piston 44 and is conveyed, for example, into a high-pressure accumulator 56.
Das Einlassventil 52 ist als in den Pumpenarbeitsraum 50 öffnendes Rück- schlagventil ausgebildet und weist ein kolbenförmiges Ventilglied 58 auf, dessen Schaft 59 in einer an die Zylinderbohrung 46 anschließenden Bohrung 60 im Ge- häuseteil 48 geführt ist. Das Ventilglied 58 weist einen im Pumpenarbeitsraum 50 angeordneten Kopf 61 mit größerem Durchmesser als der Schaft 59 auf und am Kopf 61 ist am Übergang zum Schaft 59 eine Dichtfläche 62 gebildet. Im Gehäu- seteil 48 ist am Übergang von der Zylinderbohrung 46 zur Bohrung 60 ein Ventil sitz 63 gebildet, wobei das Ventilglied 58 mit seiner Dichtfläche 62 mit dem Ven- tilsitz 63 zusammenwirkt. Im Gehäuseteil 48 ist ein das Einlassventil 52 umge- bender Zulaufraum 64 gebildet, der mit einem Zulauf für Kraftstoff verbunden ist. Vom Zulaufraum 64 führen im Gehäuseteil 48 mehrere Zulaufbohrungen 66 ab, die in die Bohrung 60 vor dem Ventilsitz 63 münden. Bei geöffnetem Einlassventil 52 strömt aus dem Zulaufraum 64 Kraftstoff durch die Zulaufbohrungen 66 und die Bohrung 60 Kraftstoff in den Pumpenarbeitsraum 50. The inlet valve 52 is designed as a non-return valve opening into the pump working chamber 50 and has a piston-shaped valve member 58, the shaft 59 of which is guided in a bore 60 in the housing part 48 adjoining the cylinder bore 46. The valve member 58 has a arranged in the pump chamber 50 head 61 with a larger diameter than the shaft 59 and the head 61 at the transition to the shaft 59, a sealing surface 62 is formed. In the housing part 48, a valve seat 63 is formed at the transition from the cylinder bore 46 to the bore 60, the valve member 58 cooperating with its sealing surface 62 with the valve seat 63. In the housing part 48, an inlet chamber 64 surrounding the inlet valve 52 is formed, which is connected to an inlet for fuel. From the inlet chamber 64 lead in the housing part 48 from a plurality of inlet bores 66, which open into the bore 60 in front of the valve seat 63. When the inlet valve 52 is open, fuel flows through the inlet bores 66 and the bore 60 into the pump working chamber 50 from the inlet chamber 64.
Das Gehäuseteil 48 der Pumpe 40 ist in seinem den Zulaufraum 64 umgebenden Bereich beispielsweise zylinderförmig ausgebildet und an diesem ist ein weiteres Gehäuseteil 68 befestigt, das ein den Zulaufraum 64 zur Außenseite der Pumpe 40 hin dicht verschließendes Verschlusselement 68 ist. Im Zulaufraum 64 ist das Filterelement 10 angeordnet, wobei radial außerhalb des Filterelements 10 die Verbindung des Zulaufraums 64 mit dem Zulauf angeordnet ist und radial inner- halb des Filterelements 10 die Zulaufbohrungen 66 zum Pumpenarbeitsraum 50 angeordnet sind. Der Ringsteg 16 des Trägerelements 12 des Filterelements 10 stützt sich in Richtung der Längsachse 14 am Gehäuseteil 48 der Pumpe 40 ab. Der äußere Rand des äußeren Bereichs 18b des Flanschbereichs 18 des Trä- gerelements 12 des Filterelements 10 kommt in Richtung der Längsachse 14 am Verschlusselement 68 als Gegenkörper zur Anlage. Während des Betriebs der Pumpe 40 können im Zulaufraum 64 Druckpulsationen auftreten, die auf das Fil- terelement 10 wirken. Durch die Öffnungen 28 im Flanschbereich 18 des Trä- gerelements 12 ist erreicht, dass die Druckpulsationen nicht zu starken Verfor- mungen des Trägerelements 12 führen, da Kraftstoff die Öffnungen 28 im Flanschbereich 18 durchströmen kann und somit ein Druckausgleich zwischen dem Zulaufraum 64 und dem durch den Flanschbereich 18 des Trägerelements 12 und dem Verschlusselement 68 begrenzten Raum ermöglicht ist. The housing part 48 of the pump 40 is, for example, cylindrically shaped in its region surrounding the inlet space 64, and a further housing part 68 is fastened to it, which is a closure element 68 sealing the inlet space 64 to the outside of the pump 40. In the inlet space 64, the filter element 10 is arranged, wherein radially outside the filter element 10, the Connection of the inlet chamber 64 is arranged with the inlet and radially within the filter element 10, the inlet bores 66 are arranged to the pump working chamber 50. The annular web 16 of the support member 12 of the filter element 10 is supported in the direction of the longitudinal axis 14 on the housing part 48 of the pump 40. The outer edge of the outer region 18b of the flange region 18 of the carrier element 12 of the filter element 10 comes into contact with the closure element 68 in the direction of the longitudinal axis 14 as a counter-body. During operation of the pump 40, 64 pressure pulsations may occur in the inlet space, which act on the filter element 10. Through the openings 28 in the flange region 18 of the carrier element 12 it is achieved that the pressure pulsations do not lead to excessive deformations of the carrier element 12, since fuel can flow through the openings 28 in the flange region 18 and thus equalize the pressure between the inlet space 64 and the through the flange portion 18 of the support member 12 and the closure member 68 limited space is made possible.
In Figur 5 ist ausschnittsweise eine Pumpe 40 gemäß einem zweiten Ausfüh- rungsbeispiel dargestellt, deren Aufbau im Wesentlichen gleich ist wie beim ers- ten Ausführungsbeispiel. Bei der Pumpe 40 gemäß dem zweiten Ausführungs- beispiel ist ein elektrischer Aktor 70 vorgesehen, durch den das Einlassventil 52 betätigbar ist. Der Aktor 70 ist vorzugsweise ein elektromagnetischer Aktor und durch diesen kann das Einlassventil 52 in seine geöffnete Stellung bewegt wer- den. Der Aktor 70 kann beispielsweise einen Magnetanker 71 aufweisen, der auf das Ventilglied 58 wirkt und der in einem Trägerteil 72 des Aktors 70 verschieb- bar geführt ist. Durch den Aktor 70 kann beim Förderhub des Pumpenkolbens 44 bestimmt werden, ob das Einlassventil geöffnet ist oder geschlossen, wodurch eine Änderung der vom Pumpenkolben 44 in den Hochdruckspeicher 56 geför- derten Kraftstoffmenge ermöglicht ist. Der Aktor 70 ist am Gehäuseteil 48 der Pumpe 40 befestigt, oberhalb des Zulaufraums 64 angeordnet und ist am Ge- häuseteil 48 der Pumpe 40 befestigt. Zwischen dem Zulaufraum 64 und dem Ak- tor 70 kann ein scheibenförmiges Zwischenelement 74 angeordnet sein, das ei- nen Teil des Gehäuses der Pumpe 40 bildet. Das Zwischenelement 74 kann bei- spielsweise vorgesehen sein, um einen definierten Abstand zwischen dem Aktor 70 und dem Gehäuseteil 48 der Pumpe 40 einzustellen. Durch das Aktorbauteil 72 oder das Zwischenelement 74, sofern dieses vorhanden ist, wird der Zulauf- raum 64 zum Aktor 70 hin begrenzt. Im Zulaufraum 64 ist das Filterelement 10 angeordnet, wobei radial außerhalb des Filterelements 10 die Verbindung des Zulaufraums 64 mit dem Zulauf ange- ordnet ist und radial innerhalb des Filterelements 10 die Zulaufbohrungen 66 zum Pumpenarbeitsraum 50 angeordnet sind. Der Ringsteg 16 des Trägerelements 12 des Filterelements 10 stützt sich in Richtung der Längsachse 14 am Gehäu- seteil 48 der Pumpe 40 ab. Der äußere Rand des äußeren Bereichs 18b des Flanschbereichs 18 des Trägerelements 12 des Filterelements 10 kommt in Rich- tung der Längsachse 14 am Aktorbauteil 72 oder am Zwischenelement 72 als Gegenkörper zur Anlage, sofern dieses vorhanden ist. Durch die Öffnungen 28 im Flanschbereich 18 des Trägerelements 12 ist wiederum erreicht, dass dieFIG. 5 shows a detail of a pump 40 according to a second exemplary embodiment, the structure of which is essentially the same as in the first exemplary embodiment. In the pump 40 according to the second exemplary embodiment, an electrical actuator 70 is provided, through which the inlet valve 52 can be actuated. The actuator 70 is preferably an electromagnetic actuator and by means of which the inlet valve 52 can be moved into its open position. The actuator 70 may, for example, have a magnet armature 71, which acts on the valve member 58 and which is displaceably guided in a carrier part 72 of the actuator 70. By the actuator 70 can be determined during the delivery stroke of the pump piston 44, whether the inlet valve is open or closed, whereby a change of the pump piston 44 in the high-pressure accumulator 56 för- encouraged amount of fuel is made possible. The actuator 70 is attached to the housing part 48 of the pump 40, arranged above the inlet space 64 and is fixed to the housing part 48 of the pump 40. A disk-shaped intermediate element 74, which forms part of the housing of the pump 40, can be arranged between the inlet space 64 and the actuator 70. The intermediate element 74 may be provided, for example, to set a defined distance between the actuator 70 and the housing part 48 of the pump 40. By the Aktorbauteil 72 or the intermediate element 74, if this is present, the inlet space 64 is limited to the actuator 70 out. In the inlet space 64, the filter element 10 is arranged, wherein radially outside the filter element 10, the connection of the inlet chamber 64 is arranged with the inlet and radially within the filter element 10, the inlet holes 66 are arranged to the pump working chamber 50. The annular web 16 of the carrier element 12 of the filter element 10 is supported in the direction of the longitudinal axis 14 on the housing part 48 of the pump 40. The outer edge of the outer region 18b of the flange region 18 of the carrier element 12 of the filter element 10 comes to rest in the direction of the longitudinal axis 14 on the actuator component 72 or on the intermediate element 72 as a counter-body, if this is present. Through the openings 28 in the flange portion 18 of the support member 12 is in turn achieved that the
Druckpulsationen nicht zu starken Verformungen des Trägerelements 12 führen, da Kraftstoff die Öffnungen 28 im Flanschbereich 18 durchströmen kann und somit ein Druckausgleich zwischen dem Zulaufraum 64 und dem durch den Flanschbereich 18 des Trägerelements 12 und dem Aktorbauteil 72 oder Zwi- schenelement 72 begrenzten Raum ermöglicht ist. Pressure pulsations do not lead to excessive deformation of the support member 12, since fuel can flow through the openings 28 in the flange 18 and thus a pressure equalization between the inlet chamber 64 and the limited by the flange 18 of the support member 12 and the actuator member 72 or intermediate member 72 space is made possible ,

Claims

Ansprüche claims
1. Filterelement für flüssiges Medium, insbesondere Kraftstoff, mit einem T rä- gerelement (12) und mit wenigstens einem mit dem Trägerelement (12) ver- bundenen, vom Medium durchströmten Filterkörper (24), wobei das Trä- gerelement (12) an einem axialen Endbereich einen über den Filterkörper (24) hinausragenden flanschförmigen Bereich (18) aufweist, dadurch ge- kennzeichnet, dass im flanschförmigen Bereich (18) des Trägerelements (12) wenigstens eine Öffnung (28; 32) vorgesehen ist. 1. Filter element for liquid medium, in particular fuel, with a T rä- gerelement (12) and at least one connected to the carrier element (12), flowed through by the medium filter body (24), wherein the carrier element (12) an axial end region has a flange-shaped region (18) projecting beyond the filter body (24), characterized in that at least one opening (28; 32) is provided in the flange-shaped region (18) of the carrier element (12).
2. Filterelement nach Anspruch 1 , dadurch gekennzeichnet, dass mehrere über den Umfang des flanschförmigen Bereichs (18) des Trägerelements (12) verteilte Öffnungen (28; 32) vorgesehen sind. 2. Filter element according to claim 1, characterized in that a plurality over the circumference of the flange-shaped region (18) of the carrier element (12) distributed openings (28; 32) are provided.
3. Filterelement nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die wenigstens eine Öffnung (28; 32) im flanschförmigen Bereich des Trä- gerelements (12) einen Bypass zum wenigstens einen Filterkörper (24) zur Durchströmung des Filterelements (10) bildet. 3. Filter element according to claim 1 or 2, characterized in that the at least one opening (28, 32) in the flange-shaped region of the carrier element (12) forms a bypass to the at least one filter body (24) for the flow through the filter element (10).
4. Filterelement nach Anspruch 3, dadurch gekennzeichnet, dass die wenigs- tens eine Öffnung (28) im flanschförmigen Bereich (18) des Trägerelements (12) einen Querschnitt aufweist, der etwa gleich groß wie oder kleiner als die Maschenweite (a) des Filterkörpers (24) ist. 4. Filter element according to claim 3, characterized in that the at least one opening (28) in the flange-shaped region (18) of the carrier element (12) has a cross-section which is approximately equal to or smaller than the mesh size (a) of the filter body (24) is.
5. Filterelement nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die wenigstens eine Öffnung (32) im flanschförmigen Bereich (18) des Trägerelements (12) von einem weiteren Filterkörper (30) überdeckt ist. 5. Filter element according to one of claims 1 to 3, characterized in that the at least one opening (32) in the flange-shaped region (18) of the carrier element (12) by a further filter body (30) is covered.
6. Pumpe, insbesondere Kraftstoffhochdruckpumpe, mit einem Gehäuse (48, 68; 48, 72), in das ein Filterelement (10) eingesetzt ist, dadurch gekenn- zeichnet, dass das Filterelement (10) gemäß einem der vorstehenden An- sprüche ausgebildet ist. 6. Pump, in particular high-pressure fuel pump, with a housing (48, 68, 48, 72) into which a filter element (10) is inserted, characterized in that the filter element (10) according to one of the preceding claims is formed ,
7. Pumpe nach Anspruch 6, dadurch gekennzeichnet, dass der flanschförmige Bereich (18) des Trägerelements (12) an einem angrenzenden Gehäuseteil (68; 72) der Pumpe (40) in Richtung der Längsachse (1 1 ) des Filterelements (10) zur Anlage kommt. 7. Pump according to claim 6, characterized in that the flange-shaped region (18) of the carrier element (12) on an adjacent housing part (68; 72) of the pump (40) in the direction of the longitudinal axis (1 1) of the filter element (10) Plant comes.
8. Pumpe nach Anspruch 6 oder 7, dadurch gekennzeichnet, dass diese ein Einlassventil (52) aufweist, dass im Gehäuse (48) der Pumpe (40) ein Zu- laufraum (64) für Medium zum Einlassventil (52) vorhanden ist, dass das Fil- terelement (10) im Zulaufraum (64) angeordnet ist und dass das Teil (68), an dem der flanschförmige Bereich (18) des Trägerelements (12) zur Anlage kommt, den Zulaufraum (64) begrenzt. 8. A pump according to claim 6 or 7, characterized in that it comprises an inlet valve (52), that in the housing (48) of the pump (40) a run-space (64) for medium to the inlet valve (52) is present the filter element (10) is arranged in the inlet space (64) and that the part (68) on which the flange-shaped area (18) of the carrier element (12) comes into contact delimits the inlet space (64).
9. Pumpe nach Anspruch 8, dadurch gekennzeichnet, dass das den Zulauf- raum (64) begrenzende Teil (68) der Pumpe ein den Zulaufraum (64) zur Außenseite des Gehäuses der Pumpe verschließendes Verschlusselement (68) ist. 9. A pump according to claim 8, characterized in that the inlet space (64) limiting part (68) of the pump is a supply chamber (64) to the outside of the housing of the pump occlusive closure element (68).
10. Pumpe nach Anspruch 8, dadurch gekennzeichnet, dass diese einen elektri- schen Aktor (70) aufweist, durch den das Einlassventil (52) betätigbar ist und dass das den Zulaufraum (64) begrenzende Teil der Pumpe (40) ein Teil (72) des Aktors (70) ist oder ein scheibenförmig ausgebildetes und zwischen dem Zulaufraum (64) und dem elektrischen Aktor (70) angeordnetes Zwi- schenelement (74) ist. 10. A pump according to claim 8, characterized in that it comprises an electrical actuator (70) through which the inlet valve (52) can be actuated and that the inflow space (64) delimiting part of the pump (40) is a part (72 ) of the actuator (70) or is a disk-shaped and between the inlet space (64) and the electrical actuator (70) arranged intermediate element (74).
PCT/EP2019/052620 2018-03-15 2019-02-04 Filter element for liquid medium, and pump with filter element WO2019174815A1 (en)

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Publication number Priority date Publication date Assignee Title
US20130239928A1 (en) * 2012-03-19 2013-09-19 Honda Motor Co., Ltd. Fuel supply structure for vehicle
DE102015212160A1 (en) 2015-06-30 2017-01-05 Robert Bosch Gmbh High-pressure fuel pump for a fuel injection device of an internal combustion engine

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130239928A1 (en) * 2012-03-19 2013-09-19 Honda Motor Co., Ltd. Fuel supply structure for vehicle
DE102015212160A1 (en) 2015-06-30 2017-01-05 Robert Bosch Gmbh High-pressure fuel pump for a fuel injection device of an internal combustion engine

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