WO2012031864A1 - Kraftstofffilter zur filterung von kraftstoff - Google Patents
Kraftstofffilter zur filterung von kraftstoff Download PDFInfo
- Publication number
- WO2012031864A1 WO2012031864A1 PCT/EP2011/064127 EP2011064127W WO2012031864A1 WO 2012031864 A1 WO2012031864 A1 WO 2012031864A1 EP 2011064127 W EP2011064127 W EP 2011064127W WO 2012031864 A1 WO2012031864 A1 WO 2012031864A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- filter
- fuel
- water
- filter element
- fuel filter
- Prior art date
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
- B01D36/005—Liquid level sensing means, e.g. for water in gasoil-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
- 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
- F02M37/28—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 with means activated by the presence of water, e.g. alarms or means for automatic drainage
-
- 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
Definitions
- the invention relates to a fuel filter for filtering fuel.
- unfiltered (raw) fuel e.g. Diesel fuel
- the filtered (pure) fuel is supplied to a heat engine for combustion.
- Unfiltered fuel typically contains various types of contaminants, e.g. 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.
- the filtering of fuels is not limited to the filtering of 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 take place in which the water is gravity-constrained in designated water collection chambers. collects, with the lighter fuel floating on the water and thus can be separated from the water.
- a fuel filter which 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.
- the fuel filter on the raw side and on the clean side each have a device for separating and discharging water.
- coalescence filter in which a typical hydrophilic filter material layer transforms water fractions from the fuel by adhesion to larger drops of water.
- the coalescence filter is arranged between two particle filters made of hydrophobic material, but it is also possible to carry out the particle filtration and the transformation to larger water drops on one and the same element.
- Biofuels especially biodiesel
- biodiesel have compared to conventional fuels an increased tendency to form stable water-fuel emulsions, so that the deposition of water from biofuels are more demanding.
- the separation of water has become the focus of development.
- the invention is therefore based on the object to improve the deposition of water, especially in the form of water droplets, from a fuel.
- a fuel filter for filtering fuel comprising a filter pot, in which a filter element is arranged, formed in a bottom portion of the filter pot water collecting chamber for collecting pure water separated from the fuel, and means for flow guidance to improve the degree of separation of water from the fuel.
- 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.
- the water components contained or emulsified in the fuel can coalesce to increasingly larger water droplets. As described above, due to the different density of the water droplets and the fuel and the flow guidance means according to the invention, it is also possible to collect or deposit coalesced water droplets with relatively small radii in the water collecting space.
- the filter element or filter medium used has, in addition to the particle-filtering properties and 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 the Particle filtering can be done in other ways, for example 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 obstructed to favor the gravity caused by separation of water and fuel.
- the inlet and outlet of the fuel filter typically run in a vertical direction.
- the means for guiding the flow comprises a wall portion for Strömungsumlen- kung, 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 Wasserammeiraum is formed the filter element preferably rests on the bottom of the filter cup.
- 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.
- the water collected in the area of the water collection chamber can act as a coalescing bath.
- the pure-side flowing medium, ie 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.
- 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 portion so that small, possibly slightly coalesced, water droplets can be stored and separated in the surrounding water phase.
- the flow of fuel and water fractions contained therein is forced by the flow guide through a water bath which acts as a coalescing bath which promotes the separation of water droplets even with relatively small radii from the purified fuel and thus to an improved effect - Contributes to segregation.
- the filter bowl may possibly be filled with water before commissioning the vehicle so that the water level above the deflection contour, i. located above the lower end of the wall section.
- a development of the previous embodiment is characterized in that the means for flow guidance means for Adjusting the level of water in the water collecting have. 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.
- the device for adjusting the water level is designed as a water overflow, which is arranged above the lower end of the wall portion. Due to the overflow, a water level is set in an advantageously simple manner in the water collection chamber, 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.
- the device for adjusting the water level comprises a water level sensor and a preferably arranged in a bottom region of the water collecting, controllable water drainage.
- a fuel filter according to this embodiment is accumulated by increasing water separation accumulated and excess water characterized in that the water level sensor registers the achievement of a predetermined water level and the controllable water flow is opened by a control unit.
- the controllable water drainage can also be arranged below the lower end of the wall section for flow deflection, in particular at the bottom of the water collection chamber.
- the fuel filter can be completely emptied by a long-lasting opening of the water drain in an advantageous manner, if this should be desired, for example during an inspection.
- the part of the water collecting space situated above the deflection contour can optionally 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.
- a filler neck is provided on the filter bowl for filling the water collecting space.
- 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.
- the water level for the water drainage Divorce be adjusted by simply filling the Wasserammeiraums that this is from the beginning above the lower end of the wall portion.
- the means for flow guidance comprise a formed at the lower end of the filter element, for Wasserammeiraum down inclined wall portion.
- 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.
- the filter element in particular an attached to the filter element end plate, spaced from the bottom of the filter pot to form the Wasserammeiraums.
- 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 at a paragraph in the filter pot rest and by means of a radial seal the raw side can be separated from the clean side or the Wasserammeiraum.
- the filter medium of the filter element at its lower end to a Wasserammeiraum inclined towards section.
- the means for flow guidance comprise an outer wall of the filter cup, which forms 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.
- 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 including an angle with a longitudinal axis of the filter element preferably more than 5 ° and less than 30 °.
- 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.
- the (conical) inner wall and the (conical) outer wall of the filter cup are substantially parallel to each other.
- 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.
- a fuel outlet of the fuel filter is preceded by a hydrophobic barrier layer.
- a hydrophobic barrier layer retains the water and allows it to flow back into the water collection chamber.
- FIG. 1 shows a first embodiment of a fuel filter according to the invention with a wall section for flow deflection
- Fig. 2 shows a second embodiment of a fuel filter according to the invention with a wall portion for flow deflection
- FIG. 3 is a plan view of a fuel filter according to the two embodiments of Fig. 1 and Fig. 2.
- a fuel filter 1 is shown for filtering fuel.
- the fuel filter 1 has a filter pot 2 with a fuel! Nlass 3 and a fuel outlet 4, wherein in the filter pot 2, a cylindrical filter element 5 is arranged, which rests at one end with an end plate 6 at the bottom 7 of the filter cup 2. Furthermore, the fuel filter 1 in a bottom portion of the filter cup 2 a Wasserammeiraum 8, which is suitable for collecting pure water separated from the fuel. As can be seen in Fig. 1, the Wasserammeiraum 8 is not limited to the clean side, but also extends through the water-permeable filter medium 5 through to the raw side.
- the fuel flows through the fuel inlet 3 in the fuel filter 1, then flows through the filter element 5 and the filter medium 5a and then leaves in purified form the fuel filter 1 via the fuel outlet 4.
- the filter element 5 serves as a particle at the same time and as coalescing filters to increase water droplets emulsified in the fuel.
- the water outlet 8 of the fuel filter 1 is preceded by a hydrophobic barrier layer 9, by means of which water not yet separated from the fuel is to be retained, so that this does not coincide with the purified fuel from the fuel filter 1 emerges.
- the fuel filter 1 also has a wall section 12 for the flow deflection, which is formed on the clean side of the filter element 5 and extends with its lower end 13 into the bottom area of the filter cup 2 or into the water chamber. melraum 8 extends into it.
- the filter element 5 sits here with the end plate 6 on the bottom 7 of the filter cup 2.
- the first wall portion 12 for flow control is set at a predetermined level of water in the fuel filter 1 and in the water collection chamber 8, the entire flow of rein workedem (filtered) fuel and contained therein (partially coalesced) water through the water in the water collection chamber 8. This is because the lower end 13 of the first wall portion 12 lies below the water surface (or a predetermined water level 14) of the water in the water collecting space 8.
- the water collected in the water collection chamber 8 or possibly filled with a filler neck (not shown) then acts as a coalescing bath which promotes the separation of water droplets from the cleaned fuel even with relatively small radii and thus contributes to improved water separation.
- a water level sensor 15 is provided on the fuel filter 1 and arranged on the other hand at the bottom 7 of the water collection chamber 8 and the filter cup 2, a water outlet 16.
- the water level sensor 15 and the water outlet 16 communicate with each other in terms of control technology, so that when a predetermined water level 14 is exceeded, there is a risk that the level will be within the range of the hydrostatic level.
- the water level sensor 15 emits a signal to the water outlet 16, which opens the water outlet 16 until the water level in the water collection chamber 14 has again reduced to a desired level.
- a simple water overflow or an overflow valve can be mounted in the fuel filter 1, which is arranged above the lower end 13 of the wall portion 12, to avoid that the water level 14 in the water collection chamber 8 too high becomes.
- a trough may optionally be provided underneath the filter pot 2, e.g. emptied during an inspection.
- the fuel filter 1, in particular the filter cup 2 has for flow guidance beyond an outer wall 17 which with a longitudinal axis
- a fuel-impermeable inner wall 19 extends from an upper end of the cylindrical filter element 5 radially inwards and downwards in the direction of the fuel outlet 4 or in the direction of the arrow 20.
- the inner wall 19 in particular passes into the first wall section 12 or the wall section 12 is on the inner wall
- FIG. 2 shows a further fuel filter 21 which, in contrast to the fuel filter of FIG. 1 has a Wasserammeiraum 22 which is formed between an end plate 23 of the filter element 5 and the bottom 7 of the filter pot 2, that is, the filter element 5 spaced from the bottom 7.
- the end disk 23 of the fuel filter 21 has a wall portion 24 inclined toward the water collecting chamber 22 for guiding the flow.
- the filter medium 5a (bellows) of the filter element 5 can also have a tapered section at its lower end. so that already in the filter medium 5a, a flow of the coalesced water towards the water collection chamber 22 can be promoted.
- the water contained in the fuel coalesces from initially small amounts of water or water droplets 10 toward larger proportions of water or droplets 11 in the filter element 5, which also serves for particle filtration.
- two or more separate filter media may alternatively be provided for particulate filtering and coalescence.
- 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.
- the fuel outlet 4 is preceded by a hydrophobic barrier layer 9 in the fuel filter 21 of FIG. 2 in order to prevent water remaining in the fuel from escaping from the fuel filter 21.
- the hydrophobic barrier layer 9 may optionally be formed as a grid and made of polyamide or polyethylene, Metblown, Spunbond or PTFE (Teflon) exist.
- the fuel filter 21 from FIG. 2 has a (conical) outer wall 25 which, with the longitudinal axis 18 of the filter element 5, forms an angle of typically between approximately 5 ° and approximately 5 °. 30 ° includes. Further, parallel to the outer wall 25 in the interior of 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, wherein in Fig. 2 additionally provided a radial seal for sealing is.
- FIG. 3 shows a top view of the fuel filters 1, 21 from FIG. 1 or FIG. 2, wherein the four fuel inlets 3 distributed over the circumference of the fuel filters 1, 21 regularly (at 90 ° angles) can be seen are. It can also be seen that the fuel outlet 4 designed as a tube is arranged in the center of the fuel filter 1, 21 or of the filter cup 2.
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- 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
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112011102984T DE112011102984A5 (de) | 2010-09-08 | 2011-08-17 | Kraftstofffilter zur Filterung von Kraftstoff |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010044773A DE102010044773A1 (de) | 2010-09-08 | 2010-09-08 | Kraftstofffilter zur Filterung von Kraftstoff |
DE102010044773.0 | 2010-09-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012031864A1 true WO2012031864A1 (de) | 2012-03-15 |
Family
ID=44545703
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2011/064127 WO2012031864A1 (de) | 2010-09-08 | 2011-08-17 | Kraftstofffilter zur filterung von kraftstoff |
Country Status (2)
Country | Link |
---|---|
DE (2) | DE102010044773A1 (de) |
WO (1) | WO2012031864A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110566385A (zh) * | 2018-06-06 | 2019-12-13 | 劳士领汽车集团 | 具有提高提取安全性的过滤器体的机动车-箱组件和这种过滤器体 |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014206954A1 (de) * | 2014-04-10 | 2015-10-15 | Mahle International Gmbh | Kraftstofffilter einer Brennkraftmaschine |
DE102014013628B4 (de) * | 2014-09-19 | 2024-06-13 | Mann+Hummel Gmbh | Wasserabscheider mit durch Schwimmerventil gesichertem Wasserüberlauf |
FR3094676B1 (fr) * | 2019-04-02 | 2021-03-05 | Plastic Omnium Advanced Innovation & Res | Dispositif limitant la pollution atmosphérique générée par l’évaporation dans l’atmosphère du carburant contenu dans un réservoir |
CN112443437B (zh) * | 2019-08-30 | 2024-01-23 | 上海索菲玛汽车滤清器有限公司 | 燃油滤清器 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2049029A1 (en) * | 1969-06-11 | 1971-03-26 | Tord Gustav | Fuel filter |
EP0699833A1 (de) * | 1994-09-02 | 1996-03-06 | Lucas Industries Public Limited Company | Brennstofffilter |
WO2001034273A1 (en) * | 1999-11-08 | 2001-05-17 | Ufi Universal Filter International S.P.A. | Diesel fuel filter and water separator |
DE10308427A1 (de) | 2003-02-27 | 2004-09-09 | Mann + Hummel Gmbh | Kraftstoffilter |
DE102007039679A1 (de) | 2006-11-10 | 2008-05-15 | Mann + Hummel Gmbh | Kraftstofffilter mit Wasserabscheider |
DE202008001534U1 (de) * | 2008-02-01 | 2009-06-10 | Mann+Hummel Gmbh | Flüssigkeitsfilter, insbesondere für Kraftstoff |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202006019301U1 (de) * | 2006-12-23 | 2008-04-30 | Mann+Hummel Gmbh | Kraftstofffilter |
-
2010
- 2010-09-08 DE DE102010044773A patent/DE102010044773A1/de not_active Withdrawn
-
2011
- 2011-08-17 WO PCT/EP2011/064127 patent/WO2012031864A1/de active Application Filing
- 2011-08-17 DE DE112011102984T patent/DE112011102984A5/de not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2049029A1 (en) * | 1969-06-11 | 1971-03-26 | Tord Gustav | Fuel filter |
EP0699833A1 (de) * | 1994-09-02 | 1996-03-06 | Lucas Industries Public Limited Company | Brennstofffilter |
WO2001034273A1 (en) * | 1999-11-08 | 2001-05-17 | Ufi Universal Filter International S.P.A. | Diesel fuel filter and water separator |
DE10308427A1 (de) | 2003-02-27 | 2004-09-09 | Mann + Hummel Gmbh | Kraftstoffilter |
DE102007039679A1 (de) | 2006-11-10 | 2008-05-15 | Mann + Hummel Gmbh | Kraftstofffilter mit Wasserabscheider |
DE202008001534U1 (de) * | 2008-02-01 | 2009-06-10 | Mann+Hummel Gmbh | Flüssigkeitsfilter, insbesondere für Kraftstoff |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110566385A (zh) * | 2018-06-06 | 2019-12-13 | 劳士领汽车集团 | 具有提高提取安全性的过滤器体的机动车-箱组件和这种过滤器体 |
Also Published As
Publication number | Publication date |
---|---|
DE112011102984A5 (de) | 2013-08-08 |
DE102010044773A1 (de) | 2012-03-08 |
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