WO2013083309A1 - Filtre a carburant et système de filtre à carburant conçu pour filter du carburant - Google Patents

Filtre a carburant et système de filtre à carburant conçu pour filter du carburant Download PDF

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Publication number
WO2013083309A1
WO2013083309A1 PCT/EP2012/069165 EP2012069165W WO2013083309A1 WO 2013083309 A1 WO2013083309 A1 WO 2013083309A1 EP 2012069165 W EP2012069165 W EP 2012069165W WO 2013083309 A1 WO2013083309 A1 WO 2013083309A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter
fuel
fuel filter
housing
end plate
Prior art date
Application number
PCT/EP2012/069165
Other languages
German (de)
English (en)
Inventor
Martin Veit
Klaus SCHWEMLEIN
Martin Klein
Original Assignee
Mann+Hummel 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 Mann+Hummel Gmbh filed Critical Mann+Hummel Gmbh
Priority to DE112012005158.0T priority Critical patent/DE112012005158A5/de
Publication of WO2013083309A1 publication Critical patent/WO2013083309A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D36/00—Filter circuits or combinations of filters with other separating devices
    • B01D36/003—Filters in combination with devices for the removal of liquids
    • 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
    • F02M37/24—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by water separating means
    • F02M37/26—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by water separating means with water detection means
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/29—Filter cartridge constructions
    • B01D2201/291—End caps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/40—Special measures for connecting different parts of the filter
    • B01D2201/4084—Snap or Seeger ring connecting means

Definitions

  • the invention relates to a fuel filter for filtering fuel, comprising a particularly bellows-shaped filter element for separating particles from the fuel and a coalescing element for separating water from the fuel.
  • a generic fuel filter is known from DE 10 2007 039 679 A1.
  • a fuel filter which has a high degree of separation of water to be separated from the fuel and particles to be separated from the fuel in a compact design and in which a means for water separation and a means for particle separation are used, wherein the two means are arranged in that the fuel to be filtered passes through the means for separating water before the means for particle separation, wherein a further means for separating particles is disposed and spaced from the means for particle separation, wherein the means for separating water is arranged between the two means for separating the particles.
  • the filter surface of the means for separating water is bounded by the design for the purpose of particle separation in the radial direction and in the axial direction by a flow channel for guiding the separated water.
  • the invention is based on the object to provide a fuel filter and a fuel filter assembly with improved water separation, which can withstand particularly high pressure loads in particular. Disclosure of the invention
  • a fuel filter of the aforementioned type which is characterized in that the coalescence element surrounds the filter element for the flow through the fuel filter in the radial direction and extends in the axial direction over the entire extent of the filter element.
  • the inventive Fuel filter is flowed through radially from the inside to the outside, wherein the filter element serves as a first filter stage and the coalescing element as a second filter stage.
  • the first filter stage serves to separate particles from the fuel to be filtered, while by means of the second filter stage the water droplets contained in the filtered fuel accumulate to form water drops and are subsequently deposited.
  • the specific surface load and thus the flow speed of the fuel to be filtered upon entry into the coalescing element are lower compared to the flow speed at the inner diameter of the filter element. This increases the residence time of the water droplets in the coalescing element and reduces the force which presses the water droplets through the coalescing element. The formation and separation of water drops can thus be carried out efficiently.
  • the filter material for the (bellows-shaped) filter element for example, cellulose or meltblown based on polyester can be used.
  • the coalescing element may e.g. consist of a hydrophilic material, which transforms water fractions in the fuel by adhesion to larger drops of water. Suitable materials are known from the literature.
  • the filter element and the coalescing element can be constructed in multiple layers.
  • the filter element and the coalescing element are arranged adjacent to one another. In this way, the filter element can be supported in the radial flow from the radially outer, full-surface circumferential coalescing and possibly further support elements.
  • a preferred embodiment of the fuel filter is characterized in that the filter element and the coalescing element are each fastened at their axial end faces in a sealing manner to a common end disk.
  • filter element and coalescing element can be glued to the end plate. In the radial flow from the inside to the outside can thus be dispensed with a separate seal for sealing raw and clean side of the coalescing.
  • at least one end disk of the fuel filter has at least one feed opening for unfiltered fuel to a radially inward, raw-side region of the fuel filter.
  • the feed opening is arranged centrally in the end disk, whereby a centric inflow of the fuel to be filtered is made possible in the filter element.
  • the centric feed opening extends in the radial direction to the inner diameter of the filter element, an efficient flow over the entire filter surface of the fuel filter is ensured.
  • At least one end disk has a peripheral edge extending in the axial direction and lying radially on the outside.
  • the edge is preferably arranged so far outward in the radial direction that it is located outside the radial region in which the filter element (and the coalescence element) are fastened to the end disk.
  • the edge may be provided with a seal to seal the clean or the raw side of the fuel filter against a filter housing.
  • a pressure compensation space between the fuel filter and the housing can be formed.
  • a particularly preferred embodiment is characterized by radially outwardly mounted support elements for supporting the coalescing element.
  • the support elements may have a grid-shaped structure.
  • the support elements can in this case be attached to the end disks which are located on the axial end faces of the filter and coalescing element, for example by latching or snap-fastening, gluing or by IR welding.
  • a breakthrough or destruction of the coalescing element and the filter element can be prevented, which otherwise can occur especially at high pressure differences between raw and clean side.
  • the support elements may in particular be designed in the form of a support basket which extends in the axial direction along the fuel filter.
  • the supporting elements abut against the coalescing element.
  • the support elements are designed as a lattice-shaped or otherwise structured casing of the coalescing element.
  • a particularly effective support of the coalescer is given.
  • a hydrophobic element extends in the axial direction in the radial direction from the coalescing element.
  • the hydrophobic element preferably surrounds the coalescing element at least in a partial region of its axial extent.
  • the hydrophobic element serves as a separator, since it is permeable to the filtered fuel while it does not pass through the water located on the clean side of the coalescing element, so that an annular space for water guidance is formed between the coalescing element and the hydrophobic element, by means of which the separated water can be brought under gravity into a below arranged water collection room.
  • the hydrophobic element can be made of polyamide or polyester, for example.
  • the hydrophobic element has a holding device for attachment to at least one end plate of the fuel filter.
  • the hydrophobic element can be encapsulated by plastic, whereby on the one hand the hydrophobic element is supported and on the other hand an attachment of the hydrophobic element to an end disc is made possible. It is understood that the hydrophobic element may be attached to the end plate in other ways, e.g. by latching.
  • the scope of the invention also covers a fuel filter arrangement for filtering fuel with a fuel filter as described above and with a filter housing in which the fuel filter is arranged.
  • the filter housing protects the fuel filter against external influences.
  • it provides interfaces for the supply and discharge of the fuel and thus for the integration of the fuel filter in an existing fuel system.
  • a refinement of the fuel filter arrangement is characterized in that, in the installed state of the fuel filter in the filter housing, at least one end disk in the axial direction is followed by a pressure equalization chamber.
  • its extent in the radial direction at least largely corresponds to the radial extent of the filter element.
  • the filter housing has a collar which rests against the radially outer edge of the end disk for sealing between the raw and clean side in the installed state of the fuel filter.
  • the collar of the filter housing and the edge of the fuel filter form sealing surfaces.
  • a seal may be provided, for example in the form of an O-ring.
  • the rim of the end plate can be slid over the collar of the filter housing during installation of the fuel filter in the filter housing, whereby a centering of the fuel filter is made possible along the edge of the annular collar in the filter housing.
  • a correct fit of the fuel filter is ensured on the collar of the filter housing side facing the fuel filter.
  • the pressure equalization space between the at least one supply port for unfiltered fuel having end plate and a housing pot of the filter housing is formed and is preferably enclosed in the radial direction of the collar.
  • the end disk facing the pressure equalization chamber has a centric feed opening for unfiltered fuel.
  • a deformation of the pressure compensation chamber facing end plate due to high pressures on the raw side of the fuel filter is prevented by the pressure equalization.
  • the pressure equalization especially at high pressures on the raw side of the fuel filter or between the raw side and the clean side, there is no increased load on the connection between the filter or coalescing element and the end plate facing the pressure equalization chamber.
  • the filter housing has a Wasserammeiraum
  • the support elements for supporting the fuel filter, in particular also for locking with the fuel filter.
  • the on the side facing away from the pressure compensation chamber side of the fuel filter end plate of the fuel filter can be supported on its side facing the filter housing by supporting elements against a voltage applied to the end plate internal pressure.
  • these support elements or other support elements may be provided to z. B. with the water collecting space facing end plate to lock.
  • a development of the embodiment just described is characterized in that the water collection chamber is formed in a housing cover of the filter housing.
  • housing cover and housing pot are connected to one another via a thread. If the housing cover is separated from the housing pot and support elements are provided which are latched to the water collecting chamber facing end plate, so when lifting the housing cover from the housing pot also the fuel filter with the housing cover removed from the housing pot. This allows easy disassembly and thus a simple replacement of the fuel filter.
  • FIG. 1 shows a fuel filter arrangement according to the invention in the sectional view
  • FIG. 2 is a perspective view of a fuel filter according to the invention and FIG. 3 is a sectional view of the fuel filter of FIG. 2 according to the invention.
  • FIG. 1 shows a fuel filter assembly 1 with a filter housing 2 having an inlet opening 3, an outlet opening at the back of the filter housing 2 (hidden by the filter housing 2) and a fuel filter 4.
  • the filter housing 2 comprises a top-mounted housing pot 5 and a bottom-mounted housing cover 6. Both are connected to one another via a thread 60, wherein a seal 7 seals the interior formed between housing pot 5 and housing cover 6 from the environment 8.
  • the housing pot 5 has a circumferential, extending in the axial direction collar 9. This collar 9 is surrounded by an edge 10 on a first end plate 1 1 of the fuel filter 4 in the radial direction.
  • a seal 12 is provided which separates the clean side 13 of the raw side 14 of the fuel filter 4 sealing.
  • a pressure equalization chamber 15 extending in the axial direction is formed between the housing pot 5 and the first end disk 11, which is bounded in the radial direction by the collar 9.
  • the inlet opening 3 is connected to the pressure equalization chamber 15.
  • the first end plate 1 1 has a feed opening 16, which is also connected to the pressure compensation chamber 15.
  • a water level sensor 17 is arranged over the entire axial length of the fuel filter 4, which detects the water level in a water collection chamber 18 of the housing cover 6.
  • the water level sensor 17 is arranged in the feed opening 16, wherein the outer diameter of the water level sensor 17 is smaller than the diameter of the feed opening 16, so that fuel from the pressure equalization chamber 15 can get into the interior of the fuel filter 4.
  • the water level sensor 17 extends through a second end plate 19. This has a central opening 20, in which the free end of the water level sensor 17 protrudes.
  • the water level sensor 17 has, in the region of the second end disk 19, a seal 21 which seals the water collecting chamber 18 with respect to the raw side 14 of the fuel filter 4.
  • a discharge opening 25 is provided on the side facing away from the inlet opening 3 of the housing cover 6, a discharge opening 25 is provided. This is closed by a drain plug 26, wherein sealing elements 27 are provided between the housing cover 6 and the drain plug 26, which seal the water collecting chamber 18 from the environment 8.
  • the drain plug 26 is threaded out of the drain port 25 by means of a thread 260 for draining the water collection chamber 18, e.g. during the inspection of a motor vehicle, in which the filter assembly 1 is installed.
  • Fig. 2 and Fig. 3 show the fuel filter 4 of Fig. 1, which has a plurality of filter stages.
  • a filter element designed as a filter bellows 28 for separating particles from the fuel to be filtered forms the first filter stage.
  • the filter bellows 28 is preferably designed as a zigzag folded filter bellows.
  • the filter bellows 28 is in radial Seen on its outer side by a coalescing element 29 for separating water from the filtered through the filter bellows 28 fuel surrounded.
  • the coalescing element 29 extends in the axial direction over the entire length of the filter bellows 28 and forms the second filter stage of the fuel filter 4.
  • the coalescing element 29 and the filter bellows 28 are fastened at their axial end faces to respective common end disks 11, 19.
  • support elements designed as a lattice-shaped sheath 30 are provided for supporting the coalescing element 29, which rest against the coalescing element 29.
  • the latticed sheath 30 is attached to the end plates 1 1, 19 in the present example.
  • lugs 31 are provided, with which the latticed sheath 30 engages the end plates 1 1, 19, for example by the lugs 31 are embedded in the manufacture of the fuel filter 4 in the plastic material of the end plates 1 1, 19.
  • the grid-shaped sheath 30 may also be glued or otherwise attached to the end plates 1 1, 19 or attached to this, for example by the sheath 30 is subsequently snapped onto the end plates 1 1, 19.
  • a hydrophobic element designed as a hydrophobic layer 32.
  • the inner lateral surface of the hydrophobic layer 32 is shown in detail in FIGS. 1 and 3.
  • a holding device designed as a lattice-shaped structure 33, which surrounds the hydrophobic layer 32 and has a latching element 34 on its side facing the first end plate 11.
  • This latching element 34 latches with a receptacle 35, which is arranged outside on the peripheral edge 10 of the first end plate 1 1.
  • an opening 36 is provided between the second end disk 19 and the latticed support structure 33 of the hydrophobic layer 32.
  • the fuel to be filtered is introduced into the fuel filter arrangement 1 via the inlet opening 3 (directional arrow 37). From the inlet opening 3, the fuel to be filtered flows into the pressure equalization chamber 15 and from there through the feed opening 16 into the fuel filter 4 (directional arrow 38). The fuel to be filtered flows through the fuel filter 4 from the inside to the outside, ie from the raw side 14 radially through the filter bellows 28 and the coalescing element 29 (direction arrows 39) to the clean side 13.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtration Of Liquid (AREA)

Abstract

La présente invention concerne un filtre à carburant (4) conçu pour filter du carburant et comprenant un élément filtrant (28) notamment en accordéon, conçu pour séparer des particules du carburant, et un élément coalesceur (29) conçu pour séparer l'eau du carburant. Afin de permettre le passage à travers le filtre à carburant (4) en direction radiale, ledit élément coalesceur (29) entoure ledit élément filtrant (28) et s'étend en direction axiale sur toute la dimension de l'élément filtrant (28).
PCT/EP2012/069165 2011-12-09 2012-09-28 Filtre a carburant et système de filtre à carburant conçu pour filter du carburant WO2013083309A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112012005158.0T DE112012005158A5 (de) 2011-12-09 2012-09-28 Kraftstofffilter und Kraftstofffilteranordnung zum Filtern von Kraftstoff

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011120643.8 2011-12-09
DE102011120643A DE102011120643A1 (de) 2011-12-09 2011-12-09 Kraftstofffilter und Kraftstofffilteranordnung zum Filtern von Kraftstoff

Publications (1)

Publication Number Publication Date
WO2013083309A1 true WO2013083309A1 (fr) 2013-06-13

Family

ID=47010547

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/069165 WO2013083309A1 (fr) 2011-12-09 2012-09-28 Filtre a carburant et système de filtre à carburant conçu pour filter du carburant

Country Status (2)

Country Link
DE (2) DE102011120643A1 (fr)
WO (1) WO2013083309A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016079029A1 (fr) * 2014-11-20 2016-05-26 Mann+Hummel Gmbh Élément filtrant avec baïonnette en saillie
WO2016079028A1 (fr) * 2014-11-20 2016-05-26 Mann+Hummel Gmbh Élément filtre séparant de l'eau côté pur et comprenant une liaison à baïonnette et filtre à carburant comprenant un élément filtre de ce type
WO2017025223A1 (fr) * 2015-08-07 2017-02-16 Mann+Hummel Gmbh Élément de séparation d'eau muni d'une pièce de support

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019215864A1 (de) * 2019-10-15 2021-04-15 Mahle International Gmbh Koalescer

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB821877A (en) * 1956-01-20 1959-10-14 Bowser Inc Filter-dehydrator
GB880537A (en) * 1959-04-13 1961-10-25 Faudi Feinbau Filter
DE102007039679A1 (de) 2006-11-10 2008-05-15 Mann + Hummel Gmbh Kraftstofffilter mit Wasserabscheider
US20110168647A1 (en) * 2008-10-08 2011-07-14 Cummins Filtration Ip Inc. Modular Filter Elements for Use in a Filter-in-Filter Cartridge
US20110259796A1 (en) * 2010-04-22 2011-10-27 Ruijun Chen Apparatus and method for removing contaminants from industrial fluids

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4477345A (en) * 1983-01-10 1984-10-16 Stant Inc. Filter separator with heater

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB821877A (en) * 1956-01-20 1959-10-14 Bowser Inc Filter-dehydrator
GB880537A (en) * 1959-04-13 1961-10-25 Faudi Feinbau Filter
DE102007039679A1 (de) 2006-11-10 2008-05-15 Mann + Hummel Gmbh Kraftstofffilter mit Wasserabscheider
US20110168647A1 (en) * 2008-10-08 2011-07-14 Cummins Filtration Ip Inc. Modular Filter Elements for Use in a Filter-in-Filter Cartridge
US20110259796A1 (en) * 2010-04-22 2011-10-27 Ruijun Chen Apparatus and method for removing contaminants from industrial fluids

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016079029A1 (fr) * 2014-11-20 2016-05-26 Mann+Hummel Gmbh Élément filtrant avec baïonnette en saillie
WO2016079028A1 (fr) * 2014-11-20 2016-05-26 Mann+Hummel Gmbh Élément filtre séparant de l'eau côté pur et comprenant une liaison à baïonnette et filtre à carburant comprenant un élément filtre de ce type
US10744433B2 (en) 2014-11-20 2020-08-18 Mann+Hummel Gmbh Clean-side water-separating filter element having bayonet connection, and fuel filter having a filter element of this type
US10773193B2 (en) 2014-11-20 2020-09-15 Mann+Hummel Gmbh Filter element having projecting bayonet-type protrusion
WO2017025223A1 (fr) * 2015-08-07 2017-02-16 Mann+Hummel Gmbh Élément de séparation d'eau muni d'une pièce de support
US10808660B2 (en) 2015-08-07 2020-10-20 Mann+Hummel Gmbh Water separation element comprising a support piece

Also Published As

Publication number Publication date
DE112012005158A5 (de) 2014-10-09
DE102011120643A1 (de) 2013-06-13

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