WO2019174815A1 - Élément filtrant pour un milieu liquide et pompe pourvue d'un élément filtrant - Google Patents

Élément filtrant pour un milieu liquide et pompe pourvue d'un élément filtrant 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
Authority
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)
English (en)
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/fr

Links

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.

Landscapes

  • 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

L'invention concerne un élément filtrant (10) pour un milieu liquide, en particulier du gazole, qui est utilisé en particulier dans une pompe de carburant à haute pression. L'élément filtrant (10) comporte un élément de support (12) et au moins un corps filtrant (24) relié à l'élément de support (12), traversé par le milieu. L'élément de support (12) comporte, sur une zone d'extrémité axiale, une zone (18) en forme de flasque dépassant du corps filtrant (24), au moins une ouverture (28 ; 32) étant prévue dans la zone (18) en forme de flasque de l'élément de support (12). L'ouverture ou les ouvertures (28 ; 32) dans la zone (18) en forme de flasque de l'élément de support (12) permettent d'éviter des déformations très importantes de l'élément de support (12) liées à la pression et/ou aux pulsations de pression régnant dans l'arrivée menant à l'élément filtrant (10).
PCT/EP2019/052620 2018-03-15 2019-02-04 Élément filtrant pour un milieu liquide et pompe pourvue d'un élément filtrant WO2019174815A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018204004.4A DE102018204004A1 (de) 2018-03-15 2018-03-15 Filterelement für flüssiges Medium und Pumpe mit Filterelement
DE102018204004.4 2018-03-15

Publications (1)

Publication Number Publication Date
WO2019174815A1 true WO2019174815A1 (fr) 2019-09-19

Family

ID=65279551

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2019/052620 WO2019174815A1 (fr) 2018-03-15 2019-02-04 Élément filtrant pour un milieu liquide et pompe pourvue d'un élément filtrant

Country Status (2)

Country Link
DE (1) DE102018204004A1 (fr)
WO (1) WO2019174815A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2610398B (en) * 2021-09-02 2024-01-24 Delphi Tech Ip Ltd Improvement to liquid fluid injection pumps

Citations (2)

* 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 (de) 2015-06-30 2017-01-05 Robert Bosch Gmbh Kraftstoffhochdruckpumpe für eine Kraftstoffeinspritzeinrichtung einer Brennkraftmaschine

Patent Citations (2)

* 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 (de) 2015-06-30 2017-01-05 Robert Bosch Gmbh Kraftstoffhochdruckpumpe für eine Kraftstoffeinspritzeinrichtung einer Brennkraftmaschine

Also Published As

Publication number Publication date
DE102018204004A1 (de) 2019-09-19

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