DE102010044773A1 - Fuel filter for filtering fuel - Google Patents

Fuel filter for filtering fuel Download PDF

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Publication number
DE102010044773A1
DE102010044773A1 DE102010044773A DE102010044773A DE102010044773A1 DE 102010044773 A1 DE102010044773 A1 DE 102010044773A1 DE 102010044773 A DE102010044773 A DE 102010044773A DE 102010044773 A DE102010044773 A DE 102010044773A DE 102010044773 A1 DE102010044773 A1 DE 102010044773A1
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Germany
Prior art keywords
filter
fuel
water
pot
collecting space
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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DE102010044773A
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German (de)
Inventor
Martin Klein
Martin Veit
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mann and Hummel GmbH
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Mann and Hummel GmbH
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Publication date
Application filed by Mann and Hummel GmbH filed Critical Mann and Hummel GmbH
Priority to DE102010044773A priority Critical patent/DE102010044773A1/en
Publication of DE102010044773A1 publication Critical patent/DE102010044773A1/en
Withdrawn legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D36/00Filter circuits or combinations of filters with other separating devices
    • B01D36/003Filters in combination with devices for the removal of liquids
    • B01D36/005Liquid level sensing means, e.g. for water in gasoil-filters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/22Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • F02M37/24Arrangements 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
    • F02M37/26Arrangements 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
    • F02M37/28Arrangements 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 with means activated by the presence of water, e.g. alarms or means for automatic drainage
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/22Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • F02M37/32Arrangements 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

Abstract

The invention relates to a fuel filter (1) for filtering fuel Fuel separated water, and means (12, 15, 16, 17, 19) for flow guidance to improve the degree of separation of water from the fuel. The means (12, 15, 16, 17, 19) for guiding the flow improve the degree of separation of water from the fuel in a particularly simple manner. No additional filter elements or complex water separation stages are necessary.

Description

  • Technical area
  • The invention relates to a fuel filter for filtering fuel. When filtering fuel, unfiltered (raw) fuel, e.g. As diesel fuel, taken from a fuel tank and freed in the fuel filter, among other things of solid particles. Subsequently, the filtered (pure) fuel is supplied to a heat engine for combustion.
  • Unfiltered fuel typically contains various types of contaminants, e.g. B. rust particles that have formed by moisture in a fuel tank. If these substances are not removed before the fuel enters the engine, premature wear and defects, for example in the fuel pump and the injection system, are the result at the high pressures used there.
  • However, the filtering of fuels is not limited to filtering out impurities. It is also desirable from a technical point of view to separate the water contained in the fuel, especially in diesel fuel, in order to maintain its lubricity. Because water is heavier than the fuels typically used, gravitational separation can occur in which the water accumulates due to gravity in designated water collecting chambers, the lighter fuel floating on the water and thus can be separated from the water.
  • State of the art
  • From the DE 103 08 427 A1 a fuel filter has become known which has a housing which has an inlet on a raw side and an outlet on a clean side, between which at least one filter element is arranged in the flow path.
  • In order to ensure the function of the filter element and at the same time to simplify the discharge of accumulated water, the fuel filter on the raw side and on the clean side each have a device for separating and discharging water.
  • Furthermore, it is z. B. from the DE 10 2007 039 679 It is known to use, as a means for separating water, so-called coalescing filters, in which a typically hydrophilic filter material layer transforms water fractions from the fuel by adhesion to larger drops of water. In the DE 10 2007 039 679 For example, the coalescing filter is disposed between two particulate filters of hydrophobic material, but it is also possible to carry out particulate filtering and transformation to larger drops of water on one and the same element.
  • Increasing environmental awareness has led to increased use of biofuels in recent years. However, biofuels, especially biodiesel, have an increased propensity to form stable water-fuel emulsions compared to conventional fuels, so that the deposition of water from biofuels is more demanding. But also in the filtration of conventional fuels, the separation of water has become the focus of development.
  • The invention is therefore based on the object of improving the separation of water, in particular in the form of water droplets, from a fuel.
  • Disclosure of the invention
  • This object is achieved by a fuel filter for filtering fuel, comprising a filter pot, in which a filter element is arranged, a water collecting space formed in a bottom portion of the filter bowl for collecting pure water separated from the fuel, and means for flow guidance to improve the separation efficiency of Water from the fuel.
  • By means of the flow guidance can be achieved in a particularly simple manner an improvement of the separation efficiency of water from the fuel. There are no additional filter elements or elaborate Wasserabscheide stages necessary to move the separation curve of the fuel filter according to the invention towards smaller drops. Thus, it is also possible to deposit droplets with smaller radii, which can have a favorable effect in particular on biofuels.
  • Typically, unfiltered fuel flows through an inlet of the fuel filter unfiltered into the filter element, to be freed when passing through the filter element of impurities, in particular of particles. Subsequently, the filtered fuel flows on the clean side in the fuel filter in the direction of an outlet of the fuel filter. In the filter element or on a filter layer optionally provided on the filter element, the water components contained or emulsified in the fuel can coalesce to increasingly larger water droplets. As shown above, it is due to the different density of Water droplets and the fuel and the means for flow guidance according to the invention also possible coalesced water droplets with relatively small radii in the water collecting space or deposit.
  • The filter element or filter medium used has not only the particle-filtering properties but also coalescing properties. This means that the fuel is not only purified with respect to dirt particles or the like as it flows through the filter element, but coalesce the water content in the filter element to increasingly larger water droplets. It is understood, however, that the filter element may possibly only have the task of coalescing water and particle filtering in other ways, for. B. can be done in an upstream filter element. In any case, the water is already coalesced to larger water droplets on the clean side of the filter element to favor the deposition.
  • The fuel filter according to the invention or the filter element is usually arranged vertically or installed in order to promote the gravity-related separation of water and fuel. The inlet and outlet of the fuel filter typically run in a vertical direction.
  • In a preferred embodiment of the fuel filter, the means for flow guidance comprise a wall portion for flow deflection, which is formed on the clean side of the filter element and extends with its lower end in the bottom region of the filter pot in which the water collection chamber is formed, wherein the filter element preferably at the bottom of the filter bowl rests.
  • In this case, the lower end of the wall section typically extends so far into the water collecting space that the flow deflection takes place below the water level of the water collecting space. As a result, the water collected in the area of the water collection chamber can act as a coalescing bath. The fact that the wall section protrudes with its lower end into the bottom region of the filter pot with the water collecting space, the pure-side flowing medium, d. H. the fuel with the coalesced water droplets is deflected by almost 180 ° on its way to a discharge of the fuel filter at the lower end of the wall section. The area of the deflection lies below the water level of the water collecting space. Therefore, advantageously, the entire flow of fuel and water fractions therein is forced through the water collecting space filled with water beyond the lower end of the wall section so that small, possibly slightly coalesced, water droplets can be stored and separated in the surrounding water phase. In other words, the flow of fuel and water contained therein is forced by means of the flow guide through a water bath, which acts as a coalescence, which promotes the separation of Wassertröfpchen even with relatively small radii from the purified fuel and thus contributes to improved water separation.
  • In order to ensure that the water level in the water collecting space is always above the deflection contour, the filter bowl may possibly be filled with water before commissioning the vehicle so that the water level above the deflection contour, d. H. located above the lower end of the wall section.
  • A development of the previous embodiment is characterized in that the means for flow guidance have a device for adjusting the water level in the water collecting space. Such a device is favorable to ensure that the water level does not increase so much that possibly the separation between fuel and separated water can not be readily made.
  • In a further development, the device for adjusting the water level is designed as a water overflow, which is arranged above the lower end of the wall section. Due to the overflow, a water level is adjusted in an advantageously simple manner in the water collecting space, which allows an improved separation of water from the fuel to be filtered. Due to the water overflow, separated and excess water can be separated without any technical effort as the filtering process progresses. The fact that the water overflow is arranged above the lower end of the wall portion, it is further ensured that the flow is deflected in its clean way from the filter element to an outlet of the fuel filter by the deflection region or Umlenkkontur and must pass through the water collection chamber.
  • In another development, the device for adjusting the water level comprises a water level sensor and a controllable water outlet, which is preferably arranged in a bottom area of the water collecting space. In a fuel filter according to this embodiment, accumulated and excess water is separated by increasing water separation characterized in that the water level sensor registers the reaching of a predetermined water level and the controllable water flow is opened by a control unit. The controllable water drain can also below the lower end of the wall section for flow deflection, in particular at the bottom of Wasserammelraums, be arranged. In addition, the fuel filter can be completely emptied by a long-lasting opening of the water drain in an advantageous manner, if this z. B. should be desired during an inspection. It is self-evident that, if appropriate, the part of the water collecting space situated above the deflection contour can alternatively be dimensioned so large that, if necessary, a device for adjusting the water level can be completely dispensed with, or merely a drain screw for discharging the water at one Inspection must be provided.
  • Also preferred is a development in which a filler neck is provided on the filter bowl for filling the water collecting space. When commissioning fuel filters, typically no water has been separated from the fuel, so that the water level does not yet reach the lower end of the wall portion for flow diversion. With or possibly without a filler neck, the water level for the water separation can be adjusted by simply filling the water collection chamber at startup of the fuel filter according to the invention so that it is above the lower end of the wall section from the beginning.
  • Another preferred embodiment is characterized in that the means for flow guidance comprise a wall section formed at the lower end of the filter element and inclined towards the water collecting space. The wall section may in particular be formed on a lower end disk of the filter element. The inclined wall section favors the separation of the heavier compared to the fuel water. The coalesced drops of water are effectively forced into the water collection space by the inclined wall section. As a result, comparatively small water droplets are not entrained in the flow of the filtered fuel through the outlet from the fuel filter, but remain in the water collecting space.
  • In a further development of the preceding embodiment, the filter element, in particular an end plate attached to the filter element, is spaced from the bottom of the filter pot to form the water collecting space. As a result, the water collecting space between the lower end of the filter element and the bottom of the filter cup or between the end plate and the bottom of the filter cup is formed by simple means. The filter element can in this case rest on a shoulder in the filter bowl and by means of a radial seal the raw side can be separated from the clean side or the water collection chamber.
  • In a further development of the preceding embodiments, the filter medium of the filter element at its lower end to the water collection space inclined portion. As a result, the advantageous effect of the inclined wall section for improved water separation already in the filter medium itself to the unfolding, which is cut off obliquely for this purpose before attaching the end plate.
  • In a likewise preferred embodiment of the fuel filter, the means for flow guidance comprise an outer wall of the filter cup, which encloses an angle with a longitudinal axis of the filter element or the filter cup, which is preferably more than 5 ° and less than 30 °. This results in an advantageous flow guidance through the fuel filter, in particular through the raw-side inlet region of the fuel into the filter element of the fuel filter, which results in an increased separation efficiency of water from the fuel.
  • Another preferred embodiment is characterized in that the flow guide means comprise an inner wall extending radially inwardly and downwardly from an upper end of the cylindrical filter element, the inner wall forming an angle with a longitudinal axis of the filter element which is preferably more than 5 ° and less than 30 °. This also results in an advantageous flow guidance through the fuel filter, in particular by the clean side part of the fuel filter, which has an increased separation efficiency of water from the fuel result. The inner wall can in this case be attached to an upper end disk of the filter element in the manner of a central tube. Preferably, the (conical) inner wall and the (conical) outer wall of the filter cup are substantially parallel to each other.
  • Also preferred is an embodiment in which the fuel is distributed through a fuel inlet over the circumference of the filter cup and in which a fuel outlet is arranged centrally on the filter cup. The fuel inlet can in this case be formed in particular on a housing cover and have a plurality of uniformly distributed over the cover inlet openings. This allows a uniform flow in the circumferential direction and in the radial direction of the fuel filter, which supports the flow guidance or improvement of the deposition according to the invention.
  • Finally, an embodiment in which a fuel outlet of the fuel filter is preceded by a hydrophobic barrier layer is also preferred. This will be done in an advantageous manner avoided that possibly not yet separated water leaking through the fuel outlet. The hydrophobic barrier retains the water and allows it to flow back into the water collection room.
  • Further features and advantages of the invention will become apparent from the following description of embodiments of the invention, with reference to the figures of the drawing, which show details essential to the invention, and from the claims. The individual features can be realized individually for themselves or for several in any combination in a variant of the invention.
  • Brief description of the drawings
  • Embodiments are illustrated in the schematic drawing and will be explained in the following description. Show it:
  • 1 A first embodiment of a fuel filter according to the invention with a wall portion for flow deflection,
  • 2 a second embodiment of a fuel filter according to the invention with a wall portion for flow deflection, and
  • 3 a plan view of a fuel filter according to the two embodiments of 1 and 2 ,
  • Embodiment (s) of the invention
  • In the 1 is a fuel filter 1 shown for filtering fuel. The fuel filter 1 has a filter pot 2 with a fuel inlet 3 and a fuel outlet 4 on, being in the filter pot 2 a cylindrical filter element 5 is arranged, the one end with an end plate 6 on the ground 7 of the filter pot 2 rests. Further, the fuel filter has 1 in a bottom area of the filter pot 2 a water collection room 8th on, which is suitable for collecting pure water separated from the fuel. As in 1 can be seen, the water collection is limited 8th not on the clean side, but also extends through the water permeable filter medium 5 through to the raw side.
  • For filtering, the fuel flows through the fuel inlet 3 in the fuel filter 1 a, then flows through the filter element 5 or the filter medium 5a and then leaves in purified form the fuel filter 1 over the fuel outlet 4 , The filter element 5 serves as both a particle and a coalescing filter to increase water droplets emulsified in the fuel. These water droplets are separated on the clean side by gravity separation and collect in the water collection chamber 8th in the bottom area of the filter pot 2 , The fuel outlet 4 of the fuel filter 1 is a hydrophobic barrier layer 9 upstream, by means of which water not separated from the fuel should be retained, so that this is not together with the purified fuel from the fuel filter 1 exit.
  • The fuel filter 1 also has a wall section for improved clean-side water separation 12 for flow deflection, on the clean side of the filter element 5 is formed and is with its lower end 13 in the bottom area of the filter pot 2 or in the water collection room 8th extends into it. The filter element 5 sits here with the end plate 6 on the ground 7 of the filter pot 2 on.
  • Through the first wall section 12 for the flow control is when setting a predetermined level of water in the fuel filter 1 or in the water collection room 8th the entire flow of clean (filtered) fuel and contained (partially coalesced) water through the water collection room 8th forced water. This is because the lower end 13 of the first wall section 12 below the water surface (or a predetermined water level 14 ) of water in the water collection room 8th lies. That in the water collection room 8th Trapped or possibly filled by a (not shown) filler neck then acts as a coalescing that promotes the separation of Wassertröfpchen with relatively small radii from the purified fuel and thus contributes to improved water separation.
  • For adjusting the water level 14 in the water collection room 8th is on the one hand a water level sensor 15 on the fuel filter 1 provided and on the ground 7 the water collection room 8th or the filter pot 2 a water drain 16 arranged. The water level sensor 15 and the water drainage 16 are technically related to each other, so that when exceeding a predetermined level of water 14 in which there is a risk that the level is in the range of the hydrophobic barrier layer 9 or the inlet opening of the outlet 4 shifts, the water level sensor 15 a signal to the water drain 16 gives off the water drain 16 opens until the water level in the water collection room 14 has again reduced to a desired level.
  • It is understood that, alternatively, a simple water overflow or an overflow valve in the fuel filter 1 can be attached, which is above the lower end 13 of the wall section 12 is arranged to avoid the water level 14 in the water collection room 8th gets too high. To catch the leaked water can be below the filter pot 2 if necessary, a tub be attached, the z. B. is emptied during an inspection.
  • The fuel filter 1 , in particular the filter pot 2 , Further, has an outer wall for guiding the flow 17 on that with a longitudinal axis 18 of the filter element 1 or the filter pot 2 an angle which is typically between about 5 ° and about 30 °. Essentially parallel to the outer wall 17 further extends in a radially inner region of the filter element 5 a fuel-impermeable inner wall 19 extending from an upper end of the cylindrical filter element 5 radially inwards and downwards towards the fuel outlet 4 or in the direction of the arrow 20 extends. The inner wall 19 especially goes into the first wall section 12 over or the wall section 12 is on the inside wall 19 educated.
  • Due to the design of the fuel filter 1 with inclined outer and / or inner walls 17 . 19 becomes the flow guide through the fuel filter 1 further improved.
  • The 2 shows another fuel filter 21 In contrast to the fuel filter 1 a water collection room 22 which is between an end plate 23 of the filter element 5 and the floor 7 of the filter pot 2 is formed, ie the filter element 5 is from the ground 7 spaced. The end disc 23 of the fuel filter 21 has to flow guidance to the water collection room 22 inclined wall section 24 on. Thus, the clean side of the filter element 21 leaking fuel, which still has water content, at the wall portion 24 the end plate 23 along, with the heavier water portions of the purified fuel at the wall portion 24 along the water collection room 22 to move and "clean up" the cleaned fuel. As a result, the water separation in the region of the second wall section 24 favors, that is, the down-settling water is in the water collection room 22 forced. In addition, the filter medium can also 5a (Bellows) of the filter element 5 have at its lower end a tapered portion, so that already in the filter medium 5a a flow of the coalesced water towards the water collection room 22 can be favored.
  • At the in 1 and 2 As shown, the water contained in the fuel coalesces from initially small amounts of water or drops of water 10 towards larger proportions of water or drops of water 11 in the filter element 5 , which also serves for particle filtration. It is understood, however, that two or more separate filter media may alternatively be provided for particulate filtering and coalescence. For example, the particle filtration can be carried out in a pre-filter and the coalescence in a downstream filter element, wherein the two functions can also be realized as different layers of a multilayer bellows.
  • As with the fuel filter 1 from 1 is also in the fuel filter 21 from 2 the fuel outlet 4 a hydrophobic barrier layer 9 upstream of any remaining water in the fuel from escaping from the fuel filter 21 intercept. The hydrophobic barrier layer 9 may optionally be formed as a grid and made of polyamide or polyethylene, Metblown, Spunbond or PTFE (Teflon) exist.
  • Analogous to the fuel filter 1 out 1 indicates the fuel filter 21 out 2 for flow guidance a (conical) outer wall 25 on that with the longitudinal axis 18 of the filter element 5 an angle of typically between about 5 ° and about 30 °. Furthermore, it runs parallel to the outer wall 25 inside the fuel filter 21 a (conical) inner wall 26 , The inclined outer and / or inner walls 25 . 26 support the improved flow guidance through the fuel filter 21 , The outer edge of the end plate 6 serves in both cases the seal against the housing pot 2 , where in 2 In addition, a radial seal is provided for sealing.
  • Finally, the shows 3 a plan view of the fuel filter 1 . 21 out 1 respectively. 2 taking the over the scope of the fuel filter 1 . 21 regularly (at 90 ° angle) distributed four fuel inlets 3 can be seen. It can also be seen that the fuel outlet formed as a pipe 4 in the center of the fuel filter 1 . 21 or the filter pot 2 is arranged.
  • Thus, it is possible to achieve an advantageous flow through the fuel filter, the fuel over the circumference of the filter cup 2 to initiate distributed and centrically.
  • QUOTES INCLUDE IN THE DESCRIPTION
  • This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
  • Cited patent literature
    • DE 10308427 A1 [0004]
    • DE 102007039679 [0006, 0006]

Claims (14)

  1. Fuel filter ( 1 ; 21 ) for filtering fuel, comprising: a filter pot ( 2 ), in which a filter element ( 5 ), one in a bottom region of the filter pot ( 2 ) formed water collecting space ( 8th ; 22 ) for collecting water separated from the fuel on the clean side, and means ( 12 . 15 . 16 . 17 . 19 ; 24 ; 25 ; 26 ) for flow guidance to improve the separation efficiency of water from the fuel.
  2. Fuel filter ( 1 ) according to claim 1, characterized in that the means for flow guidance a wall portion ( 12 ) to the flow deflection, which on the clean side of the filter element ( 5 ) is formed and with its lower end ( 13 ) in the bottom area of the filter pot ( 2 ), in which the water collecting space ( 8th ) is formed, wherein the filter element ( 5 ) preferably on the ground ( 7 ) of the filter pot ( 2 ) rests.
  3. Fuel filter ( 1 ) according to claim 2, characterized in that the lower end ( 13 ) of the wall section ( 12 ) so far into the water collection room ( 8th ) that the flow deflection below the water level ( 14 ) of the water collection room ( 8th ) he follows.
  4. Fuel filter ( 1 ) according to claim 2 or 3, characterized in that the means for flow guidance a device ( 15 ; 16 ) for adjusting the water level ( 14 ) in the water collection room ( 8th ) exhibit.
  5. Fuel filter ( 1 ) according to claim 4, characterized in that the means for adjusting the water level ( 14 ) is formed as a water overflow, which above the lower end ( 13 ) of the wall section ( 12 ) is arranged.
  6. Fuel filter ( 1 ) according to claim 4, characterized in that the means for adjusting the water level ( 14 ) a water level sensor ( 15 ) and one preferably in a bottom area of the water collecting space ( 8th ), adjustable water drain ( 16 ).
  7. Fuel filter ( 1 ) according to one of claims 2 to 6, characterized in that for filling the water collecting space ( 8th ) a filler neck on the filter pot ( 2 ) is provided.
  8. Fuel filter ( 21 ) according to claim 1, characterized in that the means for flow guidance one at the lower end of the filter element ( 5 ), to the water collection room ( 22 ) inclined wall section ( 24 ).
  9. Fuel filter ( 21 ) according to claim 8, characterized in that for the formation of the water collecting space ( 22 ) the filter element ( 5 ), in particular an end plate ( 6 . 23 ) of the filter element ( 5 ), from the ground ( 7 ) of the filter pot ( 2 ) is spaced.
  10. Fuel filter ( 21 ) according to one of claims 8 or 9, characterized in that a filter medium ( 5a ) of the filter element ( 5 ) has at its lower end a section inclined towards the water collecting space.
  11. Fuel filter ( 1 ; 21 ) according to one of the preceding claims, characterized in that the means for flow guidance an outer wall ( 17 ; 25 ) of the filter pot ( 2 ) having a longitudinal axis ( 18 ) of the filter element ( 5 ) includes an angle which is preferably more than 5 ° and less than 30 °.
  12. Fuel filter ( 1 ; 21 ) according to one of the preceding claims, characterized in that the means for flow guidance an inner wall ( 19 ; 26 ) extending from an upper end of the cylindrical filter element ( 5 ) extends radially inwardly and downwardly, wherein the inner wall ( 19 ; 26 ) with a longitudinal axis ( 18 ) of the filter element ( 5 ) includes an angle which is preferably more than 5 ° and less than 30 °.
  13. Fuel filter ( 1 ; 21 ) according to one of the preceding claims, characterized in that the fuel through a fuel inlet ( 3 ) over the circumference of the filter pot ( 2 ) and that a fuel outlet ( 4 ) centrically on the filter pot ( 2 ) is arranged.
  14. Fuel filter ( 1 ; 21 ) according to one of the preceding claims, characterized in that a fuel outlet ( 4 ) of the fuel filter ( 1 ; 21 ) a hydrophobic barrier layer ( 9 ) is connected upstream.
DE102010044773A 2010-09-08 2010-09-08 Fuel filter for filtering fuel Withdrawn DE102010044773A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE102010044773A DE102010044773A1 (en) 2010-09-08 2010-09-08 Fuel filter for filtering fuel

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102010044773A DE102010044773A1 (en) 2010-09-08 2010-09-08 Fuel filter for filtering fuel
DE112011102984T DE112011102984A5 (en) 2010-09-08 2011-08-17 Fuel filter for filtering fuel
PCT/EP2011/064127 WO2012031864A1 (en) 2010-09-08 2011-08-17 Motor fuel filter for filtering motor fuel

Publications (1)

Publication Number Publication Date
DE102010044773A1 true DE102010044773A1 (en) 2012-03-08

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DE112011102984T Pending DE112011102984A5 (en) 2010-09-08 2011-08-17 Fuel filter for filtering fuel

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WO (1) WO2012031864A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014206954A1 (en) * 2014-04-10 2015-10-15 Mahle International Gmbh Fuel filter of an internal combustion engine
WO2016041728A1 (en) * 2014-09-19 2016-03-24 Mann+Hummel Gmbh Water separator with a water overflow secured by means of a float valve
DE102018113471A1 (en) * 2018-06-06 2019-12-12 Röchling Automotive SE & Co. KG Car tank assembly with a removal safety enhancing filter body and such filter body
FR3094676A1 (en) * 2019-04-02 2020-10-09 Plastic Omnium Advanced Innovation And Research Device for limiting atmospheric pollution generated by the evaporation into the atmosphere of the fuel contained in a tank

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Publication number Priority date Publication date Assignee Title
DE10308427A1 (en) 2003-02-27 2004-09-09 Mann + Hummel Gmbh fuel
DE202006019301U1 (en) * 2006-12-23 2008-04-30 Mann+Hummel Gmbh Fuel filter
DE102007039679A1 (en) 2006-11-10 2008-05-15 Mann + Hummel Gmbh Fuel filter has water separation unit and particle separation unit, where both units are arranged, so that fuel, which is to be filtered, flows through water separation unit before particle separation unit
DE202008001534U1 (en) * 2008-02-01 2009-06-10 Mann+Hummel Gmbh Liquid filter, in particular for fuel

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FR2049029A1 (en) * 1969-06-11 1971-03-26 Tord Gustav Fuel filter
GB9417607D0 (en) * 1994-09-02 1994-10-19 Lucas Ind Plc Fuel filter
IT248285Y1 (en) * 1999-11-08 2002-12-16 Ufi Universal Filter Int Spa A fuel filter.

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
DE10308427A1 (en) 2003-02-27 2004-09-09 Mann + Hummel Gmbh fuel
DE102007039679A1 (en) 2006-11-10 2008-05-15 Mann + Hummel Gmbh Fuel filter has water separation unit and particle separation unit, where both units are arranged, so that fuel, which is to be filtered, flows through water separation unit before particle separation unit
DE202006019301U1 (en) * 2006-12-23 2008-04-30 Mann+Hummel Gmbh Fuel filter
DE202008001534U1 (en) * 2008-02-01 2009-06-10 Mann+Hummel Gmbh Liquid filter, in particular for fuel

Cited By (6)

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Publication number Priority date Publication date Assignee Title
DE102014206954A1 (en) * 2014-04-10 2015-10-15 Mahle International Gmbh Fuel filter of an internal combustion engine
WO2016041728A1 (en) * 2014-09-19 2016-03-24 Mann+Hummel Gmbh Water separator with a water overflow secured by means of a float valve
CN107073359A (en) * 2014-09-19 2017-08-18 曼·胡默尔有限公司 By means of the separator with overflow protection function of float valve
US10359016B2 (en) 2014-09-19 2019-07-23 Mann+Hummel Gmbh Water separator with a water overflow secured by means of a float valve
DE102018113471A1 (en) * 2018-06-06 2019-12-12 Röchling Automotive SE & Co. KG Car tank assembly with a removal safety enhancing filter body and such filter body
FR3094676A1 (en) * 2019-04-02 2020-10-09 Plastic Omnium Advanced Innovation And Research Device for limiting atmospheric pollution generated by the evaporation into the atmosphere of the fuel contained in a tank

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WO2012031864A1 (en) 2012-03-15

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