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WO2012102662A1 - Cartouche de filtre à huile - Google Patents

Cartouche de filtre à huile Download PDF

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Publication number
WO2012102662A1
WO2012102662A1 PCT/SE2012/050039 SE2012050039W WO2012102662A1 WO 2012102662 A1 WO2012102662 A1 WO 2012102662A1 SE 2012050039 W SE2012050039 W SE 2012050039W WO 2012102662 A1 WO2012102662 A1 WO 2012102662A1
Authority
WO
WIPO (PCT)
Prior art keywords
oil filter
filter element
conductor
oil
filter medium
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.)
Ceased
Application number
PCT/SE2012/050039
Other languages
English (en)
Inventor
Carl TENGSTEDT
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.)
Scania CV AB
Original Assignee
Scania CV AB
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 Scania CV AB filed Critical Scania CV AB
Publication of WO2012102662A1 publication Critical patent/WO2012102662A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • B01D29/13—Supported filter elements
    • B01D29/15—Supported filter elements arranged for inward flow filtration
    • B01D29/21—Supported filter elements arranged for inward flow filtration with corrugated, folded or wound sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D27/00—Cartridge filters of the throw-away type
    • B01D27/10—Safety devices, e.g. by-passes
    • B01D27/101—Filter condition indicators
    • 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
    • B01D35/005—Filters specially adapted for use in internal-combustion engine lubrication or fuel systems
    • 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
    • B01D35/143—Filter condition indicators
    • 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
    • B01D35/143—Filter condition indicators
    • B01D35/1435—Filter condition indicators with alarm means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/041—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body

Definitions

  • This invention relates to oil filter elements comprising a filter medium with sensors for monitoring of oil filter failure, an oil filter unit comprising an oil filter element, a vehicle comprising an oil filter element or an oil filter unit and a method for detecting filter medium failure of an oil filter element.
  • Oil filters are currently changed at intervals based more on statistics than on their actual status. Oil filters fail from time to time but there is currently no way for drivers to check their status while the vehicle is in motion. Oil filter failure involves rupture of the filter medium which is intended to remove particles from the oil. The cleaning function of the filter medium thus ceases.
  • Oil filters may also fail because the filter medium has become brittle. It may then crack in directions which are independent of the folds.
  • Cellulose-based filter media may be rendered brittle by too high temperatures or by acid and aggressive oil. The fibres disintegrate and the material becomes brittle.
  • KR20080058753 describes a warning system which indicates when an oil filter paper is damaged.
  • a main filter paper for filtering of oil is surrounded by an auxiliary metal mesh filter.
  • the auxiliary filter serves as a temporary filter if the main filter fails.
  • Valves are provided in the bottom of the casing which surrounds the filter paper, and the warning system signals if oil makes it way out through the valve as a result of damage to the filter paper.
  • Sensors for monitoring high pressures and temperatures in oil filters are described in, for example, CN 101526020. These sensors do not monitor oil filter failures.
  • the invention proposes to solve oil filter failure detection problems.
  • the present invention relates to an oil filter element comprising a filter medium with at least one sensor in the form of an electrical conductor, any rupture of said filter medium being intended to be detected by monitoring means.
  • the invention relates also to an oil filter unit comprising an oil filter element and a filter housing which surrounds the oil filter element.
  • the invention relates also to a vehicle comprising at least one oil filter element or oil filter unit.
  • the present invention relates also to a method for detecting filter medium failure in an oil filter element as above, comprising the steps of
  • Figure 1 depicts an oil filter element in perspective view according to the invention.
  • Figure 2 is a cross-section of part of an oil filter element according to the invention.
  • Figure 3 depicts a sheet of filter medium material before it is formed to become an oil filter element.
  • Figure 4 depicts a vehicle provided with an oil filter element.
  • Figure 5 is a block diagram for a method according to the invention.
  • the invention relates to an oil filter element comprising a filter medium with at least one sensor in the form of an electrical conductor for monitoring whether the oil filter element ruptures.
  • An oil filter element 1 is depicted in Figure 1 .
  • the oil filter element 1 comprises a filter medium 2 with at least one sensor in the form of at least one electrical conductor 4, and any rupture of said filter medium 2 is intended to be detected by the monitoring means 5.
  • the monitoring means 5 then signals and the driver of the vehicle can have the filter changed.
  • the oil filter element 1 is provided with said conductor 4 in such a way that the conductor breaks if the filter medium 2 ruptures.
  • the monitoring means 5 then detects the breaking of the conductor.
  • Said conductor 4 is connected to the monitoring means 5 via known contact devices (not depicted) and signal cables 7.
  • a current will be passed through the conductor to allow suitable technology and apparatus to measure the resistance through it. It is also possible to apply voltage to the conductor in order to be able to measure the resistance.
  • Figure 1 depicts a cover 12 which may be placed in the top of the oil filter element 1 .
  • the conductor 4 has contacts connected to signal cables 7 which lead to the monitoring means 5.
  • the monitoring means 5 may be connected to a signal system in which an indicator 1 1 , e.g. in the form of a lamp, lights up when the monitoring means 5 indicates that the filter medium 2 has ruptured.
  • the monitoring means 5 may take the form of a control system.
  • the monitoring means 5 is adapted to monitoring the resistance of said conductor 4. If the oil filter element 1 disintegrates and said conductor 4 breaks, the resistance will become infinite, which will be detected by the monitoring means 5. The resistance becoming infinite means that it increases, since it increases from a previous value when the conductor carries current. The monitoring means 5 then conveys the result to warn the driver.
  • the filter medium 2 may comprise cellulose fibres and/or synthetic fibres.
  • Cellulose fibres may be derived from wood, cotton or other plant material.
  • the filter medium may comprise synthetic fibres or a mixture of cellulose fibres and synthetic fibres.
  • the synthetic fibres may for example be polymer fibres, glass fibres or carbon fibres.
  • the fibres are usually bonded together by a phenol resin.
  • Cellulose fibres are sensitive to high temperatures and aggressive oil. Oil used in engines may absorb combustion residues, e.g. sulphuric acid, potentially rendering the oil acid and corrosive.
  • To prevent the oil becoming acid it is provided with various additives to serve as buffers. The additives are consumed over time, reducing the buffer effect and thereby allowing the oil to become acid and corrosive.
  • the fibres may become brittle, rendering the filter medium also brittle, if exposed for a time to high temperatures or aggressive oil. If the filter medium becomes brittle, it may well rupture. Filter failure may also occur if the filter medium becomes obstructed and consequently subject to high pressure.
  • the conductor 4 may be situated in or on the filter medium 2. In cases where it is in the filter medium, the conductor is placed there at the time of manufacture. In cases where it is on the filter medium, the conductor may for example be bonded to it adhesively.
  • the oil filter element 1 may be of cylindrical configuration as depicted in Figure 1 .
  • An arrow Z denotes the cylinder's axial direction, an arrow Y a direction perpendicular to the cylinder's axial direction, and an arrow X a direction perpendicular to the cylinder's axial direction.
  • the filter medium 2 may rupture in various different ways and in different directions, so the conductor needs to be so arranged that it breaks when the filter medium 2 ruptures irrespective of the direction in which the rupture takes place.
  • the conductor may be arranged in various different ways.
  • the conductor 24 is situated in or on the filter medium 22 and is preferably in contact with the constituent material of the filter medium 22 which is of cylindrical shape.
  • Figure 2 depicts a section of part of an oil filter element.
  • the conductor or conductors are situated in or on the filter medium 22 and extend in a helical shape or form part of a helical shape in the cylindrical oil filter element.
  • the filter medium 22 may be provided with at least one conductor 24 running at an angle a relative to the cylinder's axial direction Z.
  • the angle a may be between 0 and 90°. If there are two or more conductors, they may be connected separately to connecting elements which may themselves be connected to means for monitoring whether the conductor 24 or conductors break. The conductors may also be connected together and form part of a single circuit and be connectable via electrical contacts and thence by signal cables to a monitoring means.
  • the filter medium 22 may also be provided with a further conductor 29 running at an angle ⁇ relative to the cylinder's axial direction Z. Angle ⁇ may be between 0 and 90°.
  • the conductor 29 may extend in a helical shape or part of a helical shape in or on the filter medium 22 in a similar way to the conductor 24.
  • angles a and ⁇ are not equal. There needs to be a difference of at least about 20-30° between angles a and ⁇ for the sensors to be able to monitor ruptures in different directions.
  • angle a may for example be 0° and angle ⁇ 90°.
  • the filter medium 22 may be provided with two or more substantially parallel conductors 24 running at an angle a in the cylinder's axial direction Z and two or more substantially parallel conductors 29 running at an angle ⁇ relative to the cylinder's axial direction Z.
  • the conductors may run near or adjacent to one another in order to monitor whether the filter medium 22 ruptures. This rules out the possibility that the filter might rupture without the conductors breaking, in which case there would be no filter failure signal.
  • the oil filter element 1 may comprise a folded filter medium with folds 8 arranged in the cylinder's axial direction Z.
  • Figure 1 shows outer folds 8 running parallel with the cylinder's axial direction Z.
  • Inner folds 9 are visible through an upper aperture 10 in the oil filter element 1 .
  • This is a usual configuration for oil filter elements, resulting in a large surface to filter the oil.
  • the oil filter element comprises a folded filter medium with folds 8, 9 arranged in the cylinder's axial direction Z
  • at least one conductor may be arranged in that direction in a fold, i.e. the conductor or conductors are arranged at an angle a of 0°. Conductors at approximately every second fold are needed to monitor filter medium failures. It is also conceivable for a conductor to be provided in every fold, but this might affect the cost of making the oil filter element. There may also be fewer conductors than every second fold.
  • the filter medium may also have at least one conductor running at an angle ⁇ relative to the cylinder's axial direction Z.
  • the conductors may be situated in the inner folds and/or the outer folds. They may also run in the cylinder's axial direction Z in the filter medium between folds.
  • the oil filter element 1 comprises a filter medium 2, 22 which may take the form of a rectangular filter medium sheet 30, see Figure 3, before it is formed to a cylindrical configuration.
  • the two short sides 31 , 32 are then joined together to form the cylindrical configuration of the oil filter medium 2, 22.
  • the conductor is situated in or on this filter medium sheet 30.
  • the conductor may be integrated in the filter medium at the time of manufacture. It may also be placed on the filter and, for example, be bonded adhesively to it. It is possible for the conductor or conductors to be placed on the oil filter element before it is joined together to form the cylindrical configuration.
  • the direction of the short sides will be parallel with the cylinder's axial direction Z.
  • the filter medium may be provided with at least one conductor running in a zigzag pattern.
  • Figure 3 depicts a filter medium sheet 30 with a conductor 34 arranged in a zigzag shape extending from one short side to the other.
  • the conductor 34 extends to and fro between the long sides of the rectangular filter medium sheet 30.
  • the zigzag pattern may run in any desired direction of the sheet and the cylindrical oil filter element.
  • Conductors may also be arranged to run zigzag from one long side to the other. These conductors may individually be connected to monitoring means via electrical contacts, or be connected together and form part of a single circuit and be connectable to a monitoring means via electrical contacts. The connections may run to already existing electrical systems which serve as monitoring means.
  • the filter medium may be provided with at least one conductor running at angle a relative to the cylinder's axial direction Z. It may also be provided with a conductor in a zigzag pattern. The two conductors may be connected to one another to form a single circuit. Further conductors at angle a may also be connected to further zigzag conductors. Every second conductor may run at angle a and the intermediate ones may zigzag.
  • the oil filter element may also be provided with a conductor at angle ⁇ relative to the cylinder's axial direction Z.
  • the conductor may for example take the form of a wire or of rolled material such as a thin foil, in which case the thin and elongate foil will, like a wire, be laid in or on the filter medium.
  • the conductor material has to be able to carry current and may be chosen from among metals, conductive polymers and conductive adhesives.
  • the metal might be aluminium, silver, iron, gold, copper or alloys thereof. It is also possible to use rolled metal material, e.g. rolled aluminium, silver, iron, gold, copper or alloys thereof.
  • polymers which might be used in the conductor material are polyaniline or PEDOT-PPS, i.e. poly(3,4- ethylenedioxythiophene) poly(styrenesulphonate).
  • Conductive adhesives might also be used. They often contain conductive fillers, e.g. silver (Ag), gold (Au), copper (Cu), palladium/silver (Pd/Ag), carbon or graphite.
  • An example of a conductive adhesive might be epoxy adhesive containing silver.
  • the nature of the conductor material is such that it breaks when the oil filter element ruptures. Its brittleness, toughness and size are such as to give way when the oil filter element ruptures. The material used needs to be quite resistant to aggressive oil so that the wire is not too affected by the oil.
  • the conductor is a wire it may have a diameter of about 0.1 mm.
  • the diameter may be within a range of 0.02 to 2.0 mm.
  • the thickness of the conductor affects its ability to give way, which also depends on what material the conductor is made of. If the conductor is not a wire and no diameter is measurable, its cross-sectional area might be about 0.008 mm 2 . The cross- sectional area may be within a range of 0.0003 to 4.0 mm 2 .
  • the length of the conductor may vary greatly. If may for example depend on whether two or more conductors are used or just one conductor through the whole of the filter medium.
  • the oil filter element 1 may be of the insert type, in which case it will be situated in a filter housing 6. When the oil filter element 1 disintegrates, it has to be changed and a new one be put into the filter housing.
  • An insert filter is thus an oil filter element in the form of an insert which is put into a filter housing.
  • the invention relates also to an oil filter unit 13 comprising an oil filter element 1 according to the invention and a filter housing 6 which surrounds the oil filter element. This makes it possible for the whole oil filter unit to be changed when the filter medium fails, which is an advantage of using this type of oil filter.
  • the oil filter unit 13 can be removed to allow the change and then be replaced by a new oil filter unit.
  • the oil filter element 1 contained in the oil filter unit 13 is configured according to the invention.
  • the conductor 4 is connected to a monitoring means 5 via electrical contacts and signal cables 7. Contact has to be effected between the conductor 4 of the oil filter element and contact devices which are themselves connected to electrical signal cables 7 connected to the monitoring means 5.
  • the contact device may take the form of spring-loaded sheetmetal contacts pressed mechanically against the oil filter element.
  • the conductor in the oil filter element is connected to sheetmetal contacts, or a larger conductor is provided in the area where the contact is to be effected.
  • Part of the filter housing 6 is depicted in Figure 1 by a broken line. The filter housing 6 will surround the whole oil filter element 1 .
  • the conductor 4 will be so arranged that there is also contact with the filter housing, which is thus connected to the monitoring means 5 at the time of fitting oil filters in the vehicle. If the oil filter element 1 is of the insert type, the conductor 4 or conductors have to be connected to the filter housing 6 at the time of fitting the oil filter element.
  • the filter housing 6 has both inlets and outlets for the oil, although they do not appear in the diagram.
  • the present invention relates also to a vehicle 40 provided with at least one oil filter element 41 according to the invention or oil filter unit according to the invention.
  • a vehicle 40 is depicted in Figure 4.
  • the oil filter element 41 may be situated on or close to the combustion engine or at some other suitable location in the vehicle 40.
  • the invention further relates to a method illustrated in Figure 5 for detecting filter medium failure in an oil filter element as described above, comprising steps s1 10 of measuring the resistance of the conductor with a monitoring means, s120 of evaluating whether the resistance exceeds a predetermined value Ro and s130 of signalling when the resistance exceeds the predetermined value R 0 , as an indication that a filter medium failure has occurred.
  • the resistance may for example be measured by applying a voltage to the conductor and measuring the current or by passing a current through the conductor. The resistance is measured by appropriate technology and apparatus.
  • Figure 5 is a block diagram for the method according to the invention, comprising comprises the steps
  • s1 10 of measuring the resistance of the conductor with a monitoring means s120 of measuring whether the resistance is greater than a predetermined value Ro.
  • Resistance greater than a predetermined value R 0 will indicate a filter medium failure, s130. If the conductor gives way, the resistance will become infinite and therefore be greater than R 0 , but if it is not greater than a predetermined value R 0 the system will continue to measure the resistance as at step s1 10.
  • the value R 0 will depend on what material is used in the conductor, the thickness and other characteristics of the conductor which determine the value needed for indication of filter medium failure.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Filtration Of Liquid (AREA)

Abstract

La présente invention concerne une cartouche de filtre à huile 1 comprenant un matériau filtrant 2 comportant au moins un capteur se présentant sous la forme d'un conducteur électrique 4, toute rupture dudit matériau filtrant 2 étant destinée à être détectée par un moyen de surveillance 5. L'invention concerne également un ensemble filtre à huile 13 et un véhicule 40 équipés de ladite cartouche de filtre à huile 1. L'invention concerne, par ailleurs, un procédé de détection de tout défaut du matériau filtrant d'une cartouche de filtre à huile 1.
PCT/SE2012/050039 2011-01-26 2012-01-19 Cartouche de filtre à huile Ceased WO2012102662A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1150054-3 2011-01-26
SE1150054A SE535509C2 (sv) 2011-01-26 2011-01-26 Anordning och metod för att detektera bristning av oljefiltermedium

Publications (1)

Publication Number Publication Date
WO2012102662A1 true WO2012102662A1 (fr) 2012-08-02

Family

ID=46581044

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2012/050039 Ceased WO2012102662A1 (fr) 2011-01-26 2012-01-19 Cartouche de filtre à huile

Country Status (2)

Country Link
SE (1) SE535509C2 (fr)
WO (1) WO2012102662A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014170532A1 (fr) * 2013-04-17 2014-10-23 Outotec (Finland) Oy Plaque filtrante, appareil à filtre à disques, et procédé pour commander un filtre à disques
WO2017005971A1 (fr) * 2015-07-03 2017-01-12 Outotec (Finland) Oy Élément filtrant avec indicateur de rupture de conducteur
WO2017005970A1 (fr) * 2015-07-03 2017-01-12 Outotec (Finland) Oy Élément de filtre à indicateur de rupture conducteur
WO2017005969A1 (fr) * 2015-07-03 2017-01-12 Outotec (Finland) Oy Élément filtrant comprenant un indicateur de rupture conducteur
DE102016004904A1 (de) * 2016-04-22 2017-10-26 Audi Ag Filterelement, Vorrichtung zur Erfassung einer Beladung eines Filterelements und Filtervorrichtung für ein Fahrzeug

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030127402A1 (en) * 1996-12-17 2003-07-10 Dei-Tec Corporation Renewable filter
US20080072666A1 (en) * 2006-09-22 2008-03-27 General Motors Corporation Method for controlling a filter maintenance indicator
KR20080058753A (ko) * 2006-12-22 2008-06-26 두산인프라코어 주식회사 오일 여과기
CN101526020A (zh) * 2009-03-31 2009-09-09 浙江大学 机油滤清器报警装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030127402A1 (en) * 1996-12-17 2003-07-10 Dei-Tec Corporation Renewable filter
US20080072666A1 (en) * 2006-09-22 2008-03-27 General Motors Corporation Method for controlling a filter maintenance indicator
KR20080058753A (ko) * 2006-12-22 2008-06-26 두산인프라코어 주식회사 오일 여과기
CN101526020A (zh) * 2009-03-31 2009-09-09 浙江大学 机油滤清器报警装置

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014170532A1 (fr) * 2013-04-17 2014-10-23 Outotec (Finland) Oy Plaque filtrante, appareil à filtre à disques, et procédé pour commander un filtre à disques
AU2013387126B2 (en) * 2013-04-17 2016-12-01 Metso Finland Oy Filter plate, filter disc apparatus, and a method for controlling a disc filter
CN105142752B (zh) * 2013-04-17 2017-02-22 奥图泰(芬兰)公司 过滤板、过滤盘装置以及用于控制盘式过滤器的方法
EA029687B1 (ru) * 2013-04-17 2018-04-30 Оутотек (Финлэнд) Ой Фильтровальная пластина, фильтровальное дисковое устройство и способ управления дисковым фильтром
US10286342B2 (en) 2013-04-17 2019-05-14 Outotec (Finland) Oy Filter plate, filter disc apparatus, and a method for controlling a disc filter
WO2017005971A1 (fr) * 2015-07-03 2017-01-12 Outotec (Finland) Oy Élément filtrant avec indicateur de rupture de conducteur
WO2017005970A1 (fr) * 2015-07-03 2017-01-12 Outotec (Finland) Oy Élément de filtre à indicateur de rupture conducteur
WO2017005969A1 (fr) * 2015-07-03 2017-01-12 Outotec (Finland) Oy Élément filtrant comprenant un indicateur de rupture conducteur
RU184545U1 (ru) * 2015-07-03 2018-10-30 Оутотек (Финлэнд) Ой Фильтрующий элемент с проводящим индикатором разрушения
DE102016004904A1 (de) * 2016-04-22 2017-10-26 Audi Ag Filterelement, Vorrichtung zur Erfassung einer Beladung eines Filterelements und Filtervorrichtung für ein Fahrzeug

Also Published As

Publication number Publication date
SE1150054A1 (sv) 2012-07-27
SE535509C2 (sv) 2012-09-04

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