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WO2012135410A1 - Configuration de redresseur d'écoulement destinée à être utilisée avec des ensembles épurateur d'air; procédés d'assemblage et d'utilisation; et ensembles épurateur d'air avec configuration de redresseur d'écoulement - Google Patents

Configuration de redresseur d'écoulement destinée à être utilisée avec des ensembles épurateur d'air; procédés d'assemblage et d'utilisation; et ensembles épurateur d'air avec configuration de redresseur d'écoulement Download PDF

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Publication number
WO2012135410A1
WO2012135410A1 PCT/US2012/031070 US2012031070W WO2012135410A1 WO 2012135410 A1 WO2012135410 A1 WO 2012135410A1 US 2012031070 W US2012031070 W US 2012031070W WO 2012135410 A1 WO2012135410 A1 WO 2012135410A1
Authority
WO
WIPO (PCT)
Prior art keywords
screen
piece
section
flow straightener
flow
Prior art date
Application number
PCT/US2012/031070
Other languages
English (en)
Inventor
Akinobu YAMAYA
Junichi TESHIGAWARA
Hajime YAO
Shigeo Kato
Original Assignee
Donaldson Company, Inc.
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 Donaldson Company, Inc. filed Critical Donaldson Company, Inc.
Publication of WO2012135410A1 publication Critical patent/WO2012135410A1/fr

Links

Classifications

    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
    • F02M35/10262—Flow guides, obstructions, deflectors or the like
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10006—Air intakes; Induction systems characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
    • F02M35/10019—Means upstream of the fuel injection system, carburettor or plenum chamber
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10373—Sensors for intake systems
    • F02M35/10386—Sensors for intake systems for flow rate
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the present disclosure relates to air cleaner assemblies and systems, for example of the type used to filter intake air for combustion engines.
  • the disclosure specifically relates to flow straightener assemblies included within such systems, to stabilize filtered air flow being transferred from an air cleaner assembly through duct work that may include a mass air flow sensor, and then into an engine.
  • Example air flow straightener arrangements and methods of assembly are described.
  • Air cleaner assemblies are generally used to filter air directed into the engine air intake, for example as combustion air, to internal combustion engine.
  • engine air intake for example as combustion air
  • Such engines can be used for example on a variety of vehicles and other equipment.
  • a mass air flow sensor is typically a sensor positioned downstream from filter cartridge arrangements used within an air cleaner assembly.
  • the mass air flow sensor will typically be positioned in an air flow duct between the air cleaner and the engine.
  • a flow straightener for use in an air flow duct of an air cleaner system.
  • the flow straightener is typically configured to be positioned in a clean air duct between an air cleaner assembly and an engine air intake, in an air induction system for an internal combustion engine.
  • the flow straightener can be characterized as comprising first and second permeable screen sections, positioned spaced from one another.
  • the spacing is at least 1 mm and not more than 30 mm, often at least 2 mm, and not more than 20 mm, usually 2-15 mm, inclusive.
  • the flow straightener can be secured to the filter cartridge, for example at a downstream end of a filter cartridge, between the outlet flow from the cartridge and the mass air flow sensor.
  • the flow straightener or stabilizer can form part of a filter cartridge. That portion can be removably mounted on the cartridge, or be permanently secured thereto.
  • the flow straightener can be secured over an outlet flow face of a cartridge, or it can be positioned across an outlet flow aperture from a cartridge.
  • the first permeable screen section is a base or end portion of a bowl-shaped screen piece, that can be formed from a flat screen piece; and, the second screen section comprises a portion of a flat screen piece secured in position across an open end of the bowl-shaped piece.
  • Fig. 1 is a schematic depiction of an arrangement including an air cleaner assembly, a flow straightener, a mass air flow sensor and an engine system usable in or on equipment in accord with the present disclosure.
  • Fig. 2 is a schematic side cross-sectional view of a flow straightener constructed in accord with the principles described herein.
  • Fig. 3 is an enlarged fragmentary schematic view of an identified portion of
  • Fig. 4 is a schematic plan view of the flow straightener of Fig. 2.
  • Fig. 5 is a schematic depiction of an air cleaner system including a flow straightener in accord with the present disclosure.
  • Fig. 6 is a schematic, enlarged, fragmentary view of selected portions of the system depicted in Fig. 5.
  • Fig. 7 is an enlarged, schematic cross-sectional view of selected portions of the system of Fig. 5.
  • Fig. 8 is an enlarged schematic view of a selected portion of Fig. 7.
  • Fig. 9 is a schematic flow diagram schematically depicting assembly steps useable in the production of a flow straightener in accord with Figs. 2-4. Detailed Description
  • Fig. 1 is a schematic depiction of an equipment system including an air cleaner assembly, engine system, mass air flow sensor system and flow straightener arrangement in accord with the present disclosure.
  • reference numeral 1 is a schematic depiction of an equipment system including an air cleaner assembly, engine system, mass air flow sensor system and flow straightener arrangement in accord with the present disclosure.
  • reference numeral 1 is a schematic depiction of an equipment system including an air cleaner assembly, engine system, mass air flow sensor system and flow straightener arrangement in accord with the present disclosure.
  • reference numeral 1 is a schematic depiction of an equipment system including an air cleaner assembly, engine system, mass air flow sensor system and flow straightener arrangement in accord with the present disclosure.
  • the equipment system 1 can be any equipment in which an air cleaner system is used.
  • the equipment system 1 for example, can be a vehicle such as an over-the-highway truck or bus. It can be a construction or agricultural equipment, mining equipment or another system. It can be a stationary system such as a generator system.
  • an engine system for operation of the equipment of concern will generally comprise an internal combustion engine, for example a diesel engine.
  • Combustion air intake for the engine system 2 is indicated generally at 3, with the air being directed to the intake 3 via duct system 4.
  • a typical air cleaner assembly 8 comprises a housing 10 including a removable service access cover 11. Removably positioned within interior lOi of the housing 10 is positioned a serviceable air filter cartridge arrangement 13.
  • the system comprising the air cleaner assembly 8 and duct system 4 will sometimes be referred to as the air induction system for the engine 2.
  • the air cleaner assembly 8 can include a safety or secondary cartridge if desired.
  • air cleaner assembly is used herein, without more, reference is meant generally to any assembly which will filter the air and which, typically, includes at least one filter cartridge (or cartridge arrangement) therein.
  • the filter cartridge (or cartridge arrangement) is serviceable, i.e. it can be removed and be replaced with respect to the overall air cleaner assembly 8.
  • the filter cartridge 13 begins to load with dust during use, it can be removed to be refurbished or replaced.
  • mass air flow sensor 15 positioned within duct arrangement 4 is mass air flow sensor 15.
  • the mass air flow sensor (MAFS) is a sensor of a system that monitors air flow within duct 4 from air cleaner assembly 8 to engine system 2. Signals of measurements from the mass air flow sensor 15 are directed to the control arrangement 16 which can be configured to make adjustments in operation of the engine (for example fuel adjustments; sparking adjustments, etc.) based on detected air flow within the duct arrangement 4.
  • Mass air flow sensor equipment is generally commercially available from such supplies as Hitachi Automotive Systems, Harrodsburgh, KY 40330; and AC Delco, Grand Blanc, MI 48439.
  • the mass air flow sensor 15 is typically tuned for proper operation of the engine, for example during assembly or installation. It is desired to ensure that the air flow past the sensor 15 does not vary in a manner that creates undesirable fluctuations in mass air flow sensor operation, or the desired effects of the MAFS system will not be fully achieved.
  • a flow straightener or stabilizer is positioned in the air flow between the cartridge arrangement 13 and the mass air flow sensor 15. In the equipment system 1 of Fig. 1, such a flow
  • the flow straightener 20 is indicated, generally, at reference numeral 20.
  • the flow straightener 20 is a system through which air passes as is directed into or through the duct arrangement 4 and past the mass air flow sensor 15. The effect of the flow straightener 20 is to stabilize and straighten the air flow in the duct 4, for good mass air flow sensor operation.
  • the flow straightener 20 helps ensure flow past the mass air flow sensor 15, within a duct arrangement 4, is a sufficiently stable air flow, without undesirable levels of fluctuation therein that could undesirably effect proper mass air flow sensor operation.
  • an improved flow straightener 20 is provided along with techniques for its assembly and use.
  • FIG. 2-4 An Example Improved Mass Air Flow Sensor, Figs. 2-4
  • a flow straightener assembly or flow straightener 25 is depicted, usable as flow straightener 20 in an equipment system 1 in accord with Fig. 1.
  • the flow straightener 25 generally has at least two (first and second) layers of permeable screen sections 26, 27.
  • the screen sections 26, 27 are positioned spaced from one another, in the air flow stream.
  • a typical air flow direction is indicated by arrow 29, although an alternate (opposite) direction of use is feasible.
  • each of the two screen sections 26, 27 comprises a screen or flow straightening element, which will extend across duct arrangement 4, Fig. 1 , in use.
  • Extending around an outer perimeter 25p of straightener 25 is positioned a perimeter rim 30.
  • the rim 30 can be used as a mounting rim, to help secure the flow straightener 25 in position for use.
  • the screen sections 26, 27 are typically spaced by at least 1 mm, usually at least 2 mm, typically not more than 30 mm, usually not more than 20 mm and often an amount within the range of 2-15 mm, inclusive, although alternatives are possible.
  • each of screen sections 26, 27 is flat and uncontoured. Although one or both may be a portion of a screen piece that is contoured.
  • each of the screen sections 26, 27 has a total perimeter area of at least 4,000 sq. mm, typically at least 5,000 sq. mm; and, often an amount within the range of 5,000-25,000 sq. mm, typically 5,000-15,000 sq. mm. Although alternate sizes are possible, such perimeter sizes are typical.
  • Fig. 2 an example dimension of usable arrangement for a specific system described herein is provided.
  • dimension AA 101.5 mm.
  • a characteristic of preferred flow straighteners in accord with the present disclosure is that they include no filter media, between the spaced screen sections 26, 27. That is, there is preferably no permeable media such as a filtration media, positioned within the space 25s between the screen sections 26, 27. Also, preferably (except for an outer perimeter wall section discussed below) there are no spacers or obstructions to airflow between the screen sections 26, 27. That is, typically, and preferably, region 25s, which corresponds to the space between screen sections 26, 27, is an open, empty, space.
  • FIG. 3 an enlarged fragmentary view of selected and indicated portion of flow straightener 25, Fig. 2, is provided.
  • layers or screen sections 26, 27 are maintained spaced by a sidewall or perimeter wall section 33.
  • the sidewall or perimeter wall section 33 is formed from a portion of a screen piece that also forms one of the screen sections
  • perimeter wall section 33 is integral with one of screen sections 26,
  • the screen sections 26, 27 are formed, respectively, from two screen pieces 36, 37 that are secured to one another.
  • FIG. 4 a plan view of the flow straightener 25 is depicted.
  • the view in Fig. 4 is generally toward screen section 27, of screen piece 37.
  • an outer perimeter definition is generally circular. This is typical, since a typical duct 4, Fig. 1 , that is positioned between an air cleaner assembly and engine will have a generally circular interior cross-section. It is noted that in alternate systems, however, the principles of the present disclosure can be implemented with flow straighteners that do not have circular outer perimeters.
  • a variety of materials can be used for the sections 26, 27, and screen pieces 36, 37 and there is no specific requirement that the same material be used for both screen pieces 36, 37.
  • the same types of material will be used for both sections 26, 27 (and pieces 36, 37), the material comprising a formable mesh screen, such as woven wire screen.
  • a stainless steel wire mesh screen will be used.
  • each screen section comprises woven wire screen having a total thickness of not greater than 1.5 mm, typically not greater than 0.7 mm and usually at least 0.1 mm, for example, within the range of 0.1-0.7 mm.
  • the screen will typically have 5-20 pores and wires per cm in each direction.
  • the wire diameter is not greater than 0.4 mm.
  • the outer perimeter ring 38 comprises a metal piece, such as a stainless steel piece, folded or pinched (for example rolled) over joint 34
  • Usable material for the rim 38 is a thin flexible stainless steel piece, having a thickness on the order of 0.2-0.8 mm, inclusive.
  • flow straightener typically includes two, spaced, screen sections, each typically flat.
  • the screen section are typically spaced apart a distance within the range of 2 -30 mm typically 2-15 mm, and each is generally sized to extend substantially across a flow duct in which the flow straightener is positioned.
  • each screen section will have a perimeter area typically at least 4,000 sq. mm, usually at least 5,000 sq. mm and often within the range of 5,000-15,000 sq. mm depending on the system.
  • Each screen section will typically comprise a woven wire screen, although alternatives are possible.
  • one screen section is a recessed bottom of a bowl-shaped screen piece, with the second screen section comprising a portion of a second screen piece extending across the first (bowl- shaped) screen piece.
  • FIG. 5 an example air cleaner system is depicted for use of flow straightener in accord with the present description.
  • the air cleaner system is indicated generally, in Fig. 5, at 50.
  • the air cleaner system 50 includes a housing 51 with the removable access cover 52 shown secured in place by latches 53.
  • An air inlet to the housing 50 is indicated generally at 54.
  • an outlet tube or duct for filtered air leaving housing 51 is depicted.
  • the tube or duct 57 is also a mounting tube or duct for a mass air flow sensor arrangement indicated generally at 58. Air from the tube 57 and mass air flow sensor arrangement 58 passes into outlet plenum 60 and via tube 61 it is directed to the engine air intake for the equipment involved.
  • the flow straightener 25, Figs. 2-4 would be mounted in the assembly 50, typically between, within or adjacent to (i.e. under) an end of tube 57, adjacent housing 51. This will be understood by reference to Figs. 7 and 8, discussed below.
  • FIG. 6 is an exploded view of selected portions of air cleaner system 50.
  • access cover 52 with latches 53 thereon is depicted.
  • a gasket to be positioned between the access cover 52 and a remainder of the housing 51 , Fig. 5.
  • evacuation valve arrangement 66 by which water or other material which flows into the interior of the housing that is not directed into a filter cartridge 70 can be evacuated from an interior of access cover 52.
  • a main filter cartridge 70 for the air cleaner assembly or system 50 is depicted.
  • the cartridge 70 for the example depicted is generally in accord with the arrangements described in WO 2000/50149 and/or in WO 2005/063361, incorporated herein by reference.
  • the cartridge 70 then, comprises a media pack 71 which, in the example depicted, can be characterized as a coiled strip of filter material comprising a fluted sheet secured to a facing sheet, and coiled with the facing sheet directed outwardly.
  • the cartridge includes an upstream flow face 72 and an opposite downstream flow face 73, with the flutes extending therebetween.
  • Selected flutes are open at the upstream flow face 72 and closed to the downstream flow face 73, and other flutes are open at the downstream flow face 73 and closed at the upstream flow face 72, to provide a filtration system sometimes referred to as "z- filter media.”
  • z- filter media Such filtration arrangements are described in detail in WO
  • a housing seal arrangement is depicted, by which the cartridge 70 is removably sealed within housing 51.
  • the particular housing seal arrangement 75 depicted comprises an outwardly directed radial seal. That is, a perimeter seal 76 around an end of the cartridge 70, seals against a surrounding annular portion of the housing 51, when the cartridge 70 is installed.
  • an upstream end ring is positioned, to facilitate gripping the cartridge 70 during installation and removal.
  • a variety of alternate air filter cartridge arrangements can be used with the principles according to the present disclosure.
  • stacked z-filter arrangements such as described in WO 2006/017790 and WO 2006/076479 can be used.
  • the principles can be applied with a variety of other filter systems that do not use z-filter type media at all.
  • flow straighteners in accord with the present disclosure can be used in arrangements in which a pleated media is used in a cylindrical form, as for example, described in U.S. 6,955,701; or, in a somewhat conical form, as for example, described in WO 2004/039476 and WO 2006/026241.
  • Further flow straighteners can be used in systems in which media configurations in accord with U.S.
  • 7,097,694 or media configurations in accord with U.S. 2010/0186353 is used.
  • the specific configuration filter media within the air cleaner assembly is a feature that can be varied widely, with principles according to the present disclosure, since the flow straightener is typically positioned downstream from the filter cartridge, and often is not included within the air cleaner assembly itself.
  • the air configuration of the air cleaner and configuration of the media may be variable that relates to the stability of air flow entering, or within, the downstream duct in which the flow straightener is positioned.
  • certain media configurations may be subject to great air flow variability problems, in the absence of the flow straightener.
  • FIG. 7 shows an enlarged fragmentary cross-sectional view of a portion of Fig. 5, and in particular a portion involving tube 57.
  • the upper plenum or chamber 60 is seen with outlet 61 thereon.
  • the flow straightener 25 is generally positioned at an inlet end 57i of tube 57. It is secured in place by having a portion of rim 30 positioned underneath a portion 57r of tube 57.
  • Tube 57 can be secured in placed by bolts, clamps, vibration welding or by other means, as desired.
  • FIG. 8 an enlarged schematic view of selected portion of Fig. 7 is depicted. At 25 the position for the flow straightener 25 can be seen.
  • the flow straightener can be secured to the filter cartridge, for example at a downstream end of a filter cartridge, between the outlet flow from the cartridge and the mass air flow sensor.
  • the flow straightener or stabilizer can form part of a filter cartridge. That portion can be removably mounted on the cartridge, or be permanently secured thereto.
  • the flow straightener can be secured over an outlet flow face of a cartridge, or it can be positioned across an outlet flow aperture from a cartridge.
  • steps 9A-9F are depicted
  • steps 9A-9F the preferred production of a flow straightener having features generally in accord with flow straightener 25.
  • construction of a flow straightener in accord with the present disclosure relates to conducting a method of positioning two screen sections, each typically relatively flat, spaced from one another by a distance chosen, typically, from within the range of 1-30 mm, usually 2-20 mm.
  • the screen sections are positioned with no media therebetween, along a central section thereof, and preferably with no obstructions therebetween.
  • typically the screen sections define an open interior and each is spaced from one another by a perimeter construction.
  • a typical example preferred screen assembly is one in which an outer perimeter or sidewall is formed from one of two screen pieces, from which the two screen sections are formed. The assembly method described in Fig. 9, is for construction of such an arrangement.
  • a formed die 100 positioned with a screen piece 36 thereon.
  • the die 100 includes a cavity or form 101 configured for desired shaping of screen piece 36 as used in flow straightener 25.
  • the screen that forms screen piece 36 will have been a flat piece extending across cavity 101, that is depressed into the cavity 101, for example in a metal forming operation, to generate a piece shaped as depicted at 105. That shape is one in which piece 36 is configured with: central screen section 36, and sidewall 33, typically also with perimeter radially outwardly projecting perimeter flange section 36p.
  • screen piece 36 can be characterized as having a "bowl" shape or as a "bowl-shaped” screen section.
  • a piece of screen 106 used to form screen section 27 (of piece 37) in a resulting flow straightener 25, Figs. 2-4 is shown positioned over screen piece 105 resting on flange 36p.
  • screen piece 106 is shown with a perimeter 106p folded downwardly, although alternatives are possible.
  • a step of securing pieces 105, 106 in the region of perimeter flange 36p is shown at 110.
  • the attachment process or step at 110 can be a welding process, if desired.
  • step 9D trimming the resulting arrangement from step 9C is shown.
  • Variations in the trimming can be conducted.
  • the particular trimming depicted is conducted to trim excess portions of screen indicated generally at 115, from the combination. This will leave a construction having a perimeter rim section 34, at which each screen piece 36, 37 can be characterized as having a peripheral, perimeter, radially outwardly extending rim or flange; the screen pieces 36, 37 joining or abutting at the flanges (rims).
  • the result of the trimming operation is a combination comprising screen piece 37 and screen piece 36 secured to one another, forming screen sections 26, 27 secured to one another and held spaced apart by outer sidewall section 33 of piece 36.
  • the combination again, comprises an outer perimeter flange or screen rim 34 where at the screen pieces 36, 37 are secured to one another.
  • step 9F the completed flow straightener 25 is depicted, with the perimeter defined by rim piece 126.
  • metal piece 126 can be formed as a circular ring, into which a combination of screen pieces 36, 37 is positioned with rolling or folding over a portion of piece 126.
  • piece 126 can be a strip that is folded or rolled over the flange 34, as it is circumferentially positioned.
  • a flow straightener for use in an air flow duct in an air cleaner system.
  • the flow straightener is particularly well configured to be positioned in an air flow duct with a location downstream from a filter cartridge arrangement of an air cleaner and upstream from a mass air flow sensor.
  • the flow straightener comprises a first permeable screen section and a second screen section, with the first permeable screen section being secured spaced from the second permeable screen section.
  • the flow straightener includes no permeable media therein, between the first and second permeable screen sections. Also, typically there is no obstruction to gas flow position between the first and second permeable screen sections.
  • the first permeable screen section comprises a recessed base or end of a bowl-shaped screen piece.
  • the bowl- shaped screen piece has a sidewall integral with the base, formed from the same screen piece.
  • the first permeable screen section is secured within the flow straightener and is spaced from the second permeable screen section, by the (permeable) sidewall.
  • the permeable sidewall can be characterized as a "perimeter sidewall" of the first permeable screen section, (or by similar terms) under such circumstances.
  • the first permeable screen section is positioned from the second permeable screen section by a distance of at least 1 mm, typically at least 2 mm, and in typical application, by a distance of not greater than 30 mm, usually no greater than 20 mm.
  • a typical example assembly would be one in which the first screen section is positioned spaced from the second screen section by a distance within the range of 2-15 mm, inclusive.
  • both the first permeable screen section and the second permeable screen section are flat and non-contoured, indeed each is a typically a flat section of woven wire screen.
  • the perimeter area of the first permeable screen section is at least 4,000 sq. mm, typically at least 5,000 sq. mm, often not more than 20,000 sq. mm, and often an amount within the range of 5,000-15,000 sq. mm, inclusive, although alternatives are possible.
  • the second permeable screen section has a perimeter area of at least 4,000 sq. mm, typically at least 5,000 sq. mm and often a size within the range of 5,000-15,000 sq. mm, inclusive, although
  • each one of the first permeable screen section and the second permeable screen section is generally circular in perimeter definition, although alternatives are possible.
  • the first screen section comprises an end or base section of a bowl- shaped screen piece, typically that screen piece is formed to have an end (or base) section integral with a perimeter sidewall portion formed by the same screen piece.
  • each of the first and second screen sections is configured with a rim section that generally comprises a radially outwardly directed rim from a remainder of the screen piece.
  • the screen pieces are secured to one another, by having the rim sections engaged, with securing, for example by welding.
  • the rim section can be provided with a cover thereover, for example a non-porous metal piece, such as a stainless steel piece, folded or rolled over the perimeter, to define a mounting ring for the flow straightener.
  • the first screen section and the second screen section each comprise portions of a woven wire screen such as a stainless steel metal wire or screen.
  • a woven wire screen such as a stainless steel metal wire or screen.
  • each has a thickness within the range 0.1-1.5 mm, although alternatives are possible.
  • each has a wire/pore population such that in directions parallel to wires, each screen piece in which a screen section is formed, has a pore population on the order of 5-20 per cm, and a wire population on the order 5-20 per cm, with wire diameter typically under 0.4 mm.
  • an alternate characterization of a flow straightener in which the flow straightener comprises a first porous screen having a bowl-shape defining an end section and a sidewall section; and, the second porous screen piece secured to the first screen piece and positioned, with a section thereof spaced from the end section of the first screen piece by the sidewall of the first screen piece.
  • the second portion screen piece is a flat screen piece.
  • the assembly can have the various features as characterized previously herein.
  • an air cleaner system includes a filtered air duct having mass air flow sensor therein.
  • the duct is typically positioned downstream from an air cleaner assembly.
  • the duct typically has a cross-sectional within the range of 4,000 sq. cm - 15,000 sq. cm, and typically has a circular cross-section, although principles can be practiced with alternate shapes and sizes of duct.
  • a flow straightener according to the previous characterizations is positioned with spaced first and second screen sections extending across the air flow duct at a location upstream from the mass air flow sensor, and typically downstream from a filter cartridge arrangement of the air cleaner.
  • a method of forming a flow straightener for use in an air flow duct of an air cleaner system generally involves securing first and second permeable screen sections, spaced from one another, typically by a distance of at least 1 mm, usually at least 2 mm, and typically not more than 30 mm, usually not more than 20 mm.
  • a first screen piece is configured in a bowl-shape, with a recessed bottom (or end) section and a perimeter sidewall, and a second screen piece is positioned in spaced relation to the first screen piece, i.e. in extension across an open end of the bowl.
  • the first screen piece is formed into the bowl-shaped section from a flat screen piece, and the recessed bottom (end) section of the first screen pieces is flat.
  • the step of securing the two screen pieces, is typically through welding.
  • the second screen piece is a flat screen piece secured to the first screen piece.
  • the method can be practiced with a step of forming perimeter rim sections in each the two screen pieces that adjoin one another and extend radially outwardly from the configuration.
  • a non-porous covering ring can be positioned around and over the perimeter screen rims of the first and second screen pieces.
  • the non-porous rim will be a metal rim, folded or rolled over the perimeter rim of the screens.
  • the screen sections are configured within the assembly spaced within the range of 2-30 mm, typically 2-25 mm, often 2-15 mm, from one another.
  • the flow straightener can be secured to the filter cartridge, for example at a downstream end of a filter cartridge, between the outlet flow from the cartridge and the mass air flow sensor.
  • the flow straightener or stabilizer can form part of a filter cartridge. That portion can be removably mounted on the cartridge, or be permanently secured thereto.
  • the flow straightener can be secured over an outlet flow face of a cartridge, or it can be positioned across an outlet flow aperture from a cartridge.
  • a flow straightener for use with an air cleaner system.
  • the flow straightener can, for example, be configured to fit within an air flow duct of an air cleaner system.
  • the straightener can, in accord with above principles, be configured in accord with the following characterizations:
  • a flow straightener for use in an air cleaner system for example in an air flow duct; the flow straightener comprising:
  • the flow straightener includes no permeable media therein, between the first and second permeable screen sections.
  • a flow straightener according to any one (at least one) of characterizations 1 and above 2 wherein:
  • the perimeter sidewall comprises a screen section integral
  • a flow straightener according to any one (at least one) of characterizations 1
  • the first permeable screen section is positioned spaced from the second permeable screen section by a distance of at least 1 mm.
  • a flow straightener according to any one (at least one) of characterizations 1
  • the first permeable screen section is positioned spaced from the second screen section by a distance of not more than 30 mm.
  • a flow straightener according to any one (at least one) of characterizations 1
  • the first screen section is positioned spaced from the second screen section by a distance within the range of 2-20 mm, inclusive.
  • a flow straightener according to any one (at least one) of characterizations 1
  • the first permeable screen section has a perimeter area of at least 4000 sq mm;
  • the second permeable screen section has a perimeter area of at least 4000 sq mm.
  • the first screen section has a perimeter area of at least 5,000 sq mm;
  • the second screen section has a perimeter area of at least 5000 sq mm.
  • a flow straightener according to any one (at least one) of characterizations 1-
  • the first screen section has a perimeter area of within the range of 5000 -15,000 sq mm, inclusive;
  • the second screen section has a perimeter area of within the range of 5000 -15,000 sq mm, inclusive.
  • a flow straightener according to any one (at least one) of characterizations 1-
  • the first screen section comprises an end section of a bowl-shaped screen piece; the first screen section being bordered at a perimeter thereof by an integral wall section of the bowl-shaped screen piece; and,
  • the second screen section comprises a portion of a flat screen piece.
  • a flow straightener according to any one (at least one) of characterizations 1-
  • the first screen section is a portion of a first screen piece having a first perimeter rim section
  • the second screen section is a portion of a second screen piece having a second perimeter rim section
  • a flow straightener according to any one (at least one) of characterizations 1 -
  • the perimeter rim comprises a non-porous metal piece folded over the first and second, perimeter rim sections.
  • a flow straightener according to any one (at least one) of characterizations 1- 15 wherein:
  • the first screen section comprises a portion of a wire screen having a thickness within the range of 0.1 -1.5 mm;
  • the second screen section comprises a portion of a wire screen having a thickness within the range of 0.1 -1.5 mm.
  • a flow straightener for use in an air flow duct of an air cleaner system comprising:
  • the second porous screen piece is a flat screen piece.
  • An air cleaner system including:
  • characterizations 1-18 above positioned with spaced first and second screen sections extending across the air flow duct at a location upstream from the mass air flow sensor.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

L'invention porte sur une configuration de redresseur d'écoulement, laquelle configuration peut être utilisée avec un ensemble épurateur d'air. Le redresseur d'écoulement comprend de façon générale des première et secondes sections de tamis perméables, espacées l'une de l'autre. Les sections de tamis peuvent comprendre des pièces de tamis en treillis métallique. Dans un exemple décrit, l'une des pièces de tamis est configurée en forme de bol, et l'autre est une pièce plate positionnée en extension sur la première pièce en forme de bol de façon à former le redresseur d'écoulement. L'invention porte également sur des procédés d'assemblage et d'utilisation, ainsi que sur des systèmes ayant le redresseur d'écoulement positionné à l'intérieur de ceux-ci.
PCT/US2012/031070 2011-03-31 2012-03-29 Configuration de redresseur d'écoulement destinée à être utilisée avec des ensembles épurateur d'air; procédés d'assemblage et d'utilisation; et ensembles épurateur d'air avec configuration de redresseur d'écoulement WO2012135410A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201161469917P 2011-03-31 2011-03-31
US61/469,917 2011-03-31

Publications (1)

Publication Number Publication Date
WO2012135410A1 true WO2012135410A1 (fr) 2012-10-04

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016083885A1 (fr) * 2014-11-24 2016-06-02 Ufi Filters S.P.A. Système d'aspiration pour moteurs à combustion interne

Citations (14)

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Publication number Priority date Publication date Assignee Title
WO1988003990A1 (fr) * 1986-11-24 1988-06-02 Bendix Electronics Limited Diffuseur d'air pour moteurs
EP0373930A2 (fr) * 1988-12-15 1990-06-20 Yamatake-Honeywell Co. Ltd. Débitmètre
US5596969A (en) * 1995-10-02 1997-01-28 Cummins Engine Company, Inc. Flow conditioning gas mass sensor
DE19652753A1 (de) * 1996-12-18 1998-06-25 Bosch Gmbh Robert Vorrichtung zur Messung der Masse eines strömenden Mediums
WO2000050149A1 (fr) 1999-02-26 2000-08-31 Donaldson Company, Inc. Systeme d'etancheite pour filtre
WO2004039476A1 (fr) 2002-10-28 2004-05-13 Donaldson Company, Inc. Filtre a air, cartouches de filtres remplaçables et procedes
WO2005063361A1 (fr) 2003-12-22 2005-07-14 Donaldson Company, Inc. Element filtrant muni d'un element d'etancheite et procede de fabrication
US6955701B2 (en) 2002-03-28 2005-10-18 Donaldson Company, Inc. Filter element and use thereof; methods of manufacture
WO2005107924A2 (fr) 2004-04-30 2005-11-17 Donaldson Company, Inc. Dispositions de filtres; logements ; assemblages et méthodes
WO2006017790A1 (fr) 2004-08-06 2006-02-16 Donaldson Company, Inc. Agencement de filtre à air; montage; et, procédés
WO2006026241A1 (fr) 2004-08-25 2006-03-09 Donaldson Company, Inc. Purificateur d'air; cartouches filtrantes interchangeables; et procedes correspondants
WO2006076479A1 (fr) 2005-01-13 2006-07-20 Donaldson Company, Inc. Cartouche et assemblage de filtre a air
US7097694B1 (en) 2003-12-04 2006-08-29 Fleetguard, Inc. High performance, high efficiency filter
US20100186353A1 (en) 2008-12-23 2010-07-29 Mann+Hummel Gmbh Filter mechanism for internal combustion engines

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988003990A1 (fr) * 1986-11-24 1988-06-02 Bendix Electronics Limited Diffuseur d'air pour moteurs
EP0373930A2 (fr) * 1988-12-15 1990-06-20 Yamatake-Honeywell Co. Ltd. Débitmètre
US5596969A (en) * 1995-10-02 1997-01-28 Cummins Engine Company, Inc. Flow conditioning gas mass sensor
DE19652753A1 (de) * 1996-12-18 1998-06-25 Bosch Gmbh Robert Vorrichtung zur Messung der Masse eines strömenden Mediums
WO2000050149A1 (fr) 1999-02-26 2000-08-31 Donaldson Company, Inc. Systeme d'etancheite pour filtre
US6955701B2 (en) 2002-03-28 2005-10-18 Donaldson Company, Inc. Filter element and use thereof; methods of manufacture
WO2004039476A1 (fr) 2002-10-28 2004-05-13 Donaldson Company, Inc. Filtre a air, cartouches de filtres remplaçables et procedes
US7097694B1 (en) 2003-12-04 2006-08-29 Fleetguard, Inc. High performance, high efficiency filter
WO2005063361A1 (fr) 2003-12-22 2005-07-14 Donaldson Company, Inc. Element filtrant muni d'un element d'etancheite et procede de fabrication
WO2005107924A2 (fr) 2004-04-30 2005-11-17 Donaldson Company, Inc. Dispositions de filtres; logements ; assemblages et méthodes
WO2006017790A1 (fr) 2004-08-06 2006-02-16 Donaldson Company, Inc. Agencement de filtre à air; montage; et, procédés
WO2006026241A1 (fr) 2004-08-25 2006-03-09 Donaldson Company, Inc. Purificateur d'air; cartouches filtrantes interchangeables; et procedes correspondants
WO2006076479A1 (fr) 2005-01-13 2006-07-20 Donaldson Company, Inc. Cartouche et assemblage de filtre a air
US20100186353A1 (en) 2008-12-23 2010-07-29 Mann+Hummel Gmbh Filter mechanism for internal combustion engines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016083885A1 (fr) * 2014-11-24 2016-06-02 Ufi Filters S.P.A. Système d'aspiration pour moteurs à combustion interne

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