EP0837238A2 - Mouldable acoustic devices - Google Patents
Mouldable acoustic devices Download PDFInfo
- Publication number
- EP0837238A2 EP0837238A2 EP97304416A EP97304416A EP0837238A2 EP 0837238 A2 EP0837238 A2 EP 0837238A2 EP 97304416 A EP97304416 A EP 97304416A EP 97304416 A EP97304416 A EP 97304416A EP 0837238 A2 EP0837238 A2 EP 0837238A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- acoustic
- mouldable
- compartment
- coupled
- air filter
- 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.)
- Granted
Links
- 239000011358 absorbing material Substances 0.000 claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 239000004033 plastic Substances 0.000 claims description 7
- 229920003023 plastic Polymers 0.000 claims description 7
- 238000004026 adhesive bonding Methods 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- 238000009941 weaving Methods 0.000 claims description 2
- 239000012814 acoustic material Substances 0.000 abstract description 5
- 239000003638 chemical reducing agent Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 241000973497 Siphonognathus argyrophanes Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
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
- F02M35/14—Combined air cleaners and silencers
-
- 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
- F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
- F02M35/1205—Flow throttling or guiding
- F02M35/1216—Flow throttling or guiding by using a plurality of holes, slits, protrusions, perforations, ribs or the like; Surface structures; Turbulence generators
-
- 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
- F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
- F02M35/1288—Intake silencers ; Sound modulation, transmission or amplification combined with or integrated into other devices ; Plurality of air intake silencers
Definitions
- the present invention relates to mouldable acoustic devices, and in particular to mouldable acoustic tubular lining devices made of sound-absorbing material or a set of sound-absorbing materials, which has the shape thereof predetermined according to the internal characteristics of vehicle engine air inlet components, such as air filter of an automobile, pick-up truck, truck or the like.
- acoustic devices to be located in the interior of a vehicle engine's air filter, which can be, for example, known sound-reducers or truncated-cone sound reducers, made of plastics or metal, which are generally coupled around circular openings (1-A1, 2A1) - see Figure 1 annexed hereto, showing a lateral cross-section of a type of conventional air filter - made respectively on one side of the air filter's upper compartment (1) and lower compartment (2), the air filter element (3) being compressed between the two compartments (1,2) and the internal supports for said air filter element (3).
- the air is aspirated by the dirty air inlet nozzle (1-A) of the upper compartment (1) and in the aspiration sequence - indicated by the larger arrows (S-1) - the air passes through the noise reducer or truncated cone shaped sonorizer - not shown on the Figure - coupled around the circular opening (1-A1), enters the upper compartment (1), then passes through the filtering element (3), enters the lower compartment (2) of the filter and passes through the noise reducer or truncated cone shaped sonorizer of the lower compartment (2) that is coupled around the circular opening (2-A1), entering the purified air exit nozzle (2-A) and then into the vehicle's engine, whereby, simultaneously and inversely to the trajectory described above, there is a sequence of inlet noises by means of sound waves - shown sequentially by bold arrows (S-2) which finally exit through the filter's upper compartment (1) dirty air inlet nozzle (1-A).
- acoustic devices which may be located in the outer part of the air filter, which can be for example, tubes or boxes that control the air input to the engine and which are arranged upstream of the air filter, coupled to the nozzle (1-A) of the dirty air inlet of the air filter's upper compartment (1).
- the above-mentioned conventional acoustic devices are intended to reduce the inlet noises.
- a conventional clean air passage tube (5) made of rubber or plastics, which is coupled to the clean air exit nozzle (2-A) of the air filter's lower compartment (2) and to the carburetor nozzle (6) comprises merely a leak proof tube (5) that ensures a seal for the conducted air.
- the tube (5) is typically made of rubber or plastics causes it to transmit the engine noise via the filter; because the clean air passage tube (5) interconnects the air filter and the carburetor (6), it is an integral part of the vehicle engine inlet assembly.
- the mouldable acoustic device of the present invention ameliorates the deficiencies with known arrangements.
- the invention comprises a mouldable acoustic device internally coupled to a vehicle engine's air filter, being coupled inside an air filter provided with an upper compartment (1) having a dirty air inlet nozzle (1-A) and a circular opening (1-A1) made on the wall of compartment (1) the air filter element (3) being pressed between the filter's upper (1) and lower (2) compartments and tie internal supports (4) of said air filter element, with a circular opening (2-A1) made on the wall of compartment (2), followed by purified air exit nozzle (2-A) towards the inside of the vehicle's engine, the acoustic device being made by moulding, thermo-pressing machine or any other appropriate manufacture process, with a predetermine shape, according to the internal and acoustic characteristics of the type of air filter in which it will be applied, the mouldable, acoustic device preferably comprising porous acoustic absorbing material, preferably comprising a lining of one or more sheets or plates of said material.
- the mouldable acoustic device therefore comprises an acoustic internal lining that can assume several shapes - compatible with the internal and acoustic shapes of the conventional air filter to which it will be internally coupled (typically by gluing) - the device being therefore a stamped or thermoformed part (optionally removable), that can be coupled inside the conventional air filter's upper compartment or lower compartment.
- Figure 3 shows a lateral cross-section of a conventional air filter provided with an upper compartment (1) having a dirty air nozzle (2-A) and a circular opening (1-A1) made on the wall of compartment (1), the air filter element (3) being pressed between the filter's upper (1) and lower (2) compartment and the internal supports (4) of the air filter element, there being a circular opening (2-A1) made on the wall of compartment (2), which is followed by a purified air exit nozzle (2-A) towards the inside of the vehicle's engine.
- Figure 3 shows a lateral cross-section of a conventional air filter provided with an upper compartment (1) having a dirty air nozzle (2-A) and a circular opening (1-A1) made on the wall of compartment (1), the air filter element (3) being pressed between the filter's upper (1) and lower (2) compartment and the internal supports (4) of the air filter element, there being a circular opening (2-A1) made on the wall of compartment (2), which is followed by a purified air exit nozzle (2-A) towards the inside of the vehicle's engine.
- the mouldable acoustic device forms a lining box (5) (of generally square, circular or any other suitable shape conforming to the interior of the filter), that is coupled (typically by gluing) to the inner surfaces of the air filter's upper compartment (1), with a circular lateral opening (5-A) coinciding with the circular lateral opening (1-A1) of the upper compartment (1) and also coinciding with the circular lateral opening (2-A1) of the lower compartment (2), the lining box (5) being open in the direction of positioning with the air filter element (3).
- a lining box (5) (of generally square, circular or any other suitable shape conforming to the interior of the filter), that is coupled (typically by gluing) to the inner surfaces of the air filter's upper compartment (1), with a circular lateral opening (5-A) coinciding with the circular lateral opening (1-A1) of the upper compartment (1) and also coinciding with the circular lateral opening (2-A1) of the lower compartment (2), the lining box (5) being open in the direction of positioning with the air filter element
- the device is mouldable in the shape of a lining box (5) of required shape, that internally lines the air filter's upper (1) and lower (2) compartments, or may line only one of these two compartments (1 or 2).
- the mouldable acoustic device in the shape of a lining box (5) comprises a porous acoustic absorbing material or more than one porous acoustic material advantageously in sheet or plate form.
- this material can be a non-woven, porous and/or treated sheet, fibrous material or plate (for example, of polyester).
- this set of materials can comprise superimposed lining sheets or plates glued to each other, made, for example, of porous paper, perforated aluminium or cotton tissue.
- a mould For manufacture of the mouldable acoustic device (5) is employed a mould, a thermo-pressing machine or another appropriate manufacturing process. It should be emphasised that for each type of conventional filter a study of its acoustic characteristics is made in order to allow the proper moulding of the acoustic, box-shaped lining device (5) applicable thereto.
- the technical effect caused by the mouldable acoustic lining device (5) is that of absorbing the sound waves; the invention has shown a significant decibel gain in respect of prior art noise reducers or truncated cone shaped sonorizers made of plastic or metal, and acoustic external tubes or boxes.
- an improved mouldable acoustic tubular device has been developed to solve the technical deficiency relating to the prior art clean air passage tube (5) shown in Figure 2.
- the device comprises an acoustic, internal, tubular lining device (7) having a predetermined shape, in accordance with the internal characteristics of the clean air passage tube (5), wherein the acoustic tubular lining device (7) will be applied internally by adhesive or the like, typically remaining fixed to the inner portion of tube (5) inner portion, the acoustic tubular lining device (7) being capable of being applied partially or totally along the tube (5) inner portion, also with an end thereof optionally extending beyond the tube (5) limit, in the coupling thereof to the clean air exit nozzle (2-A).
- Figures 4 and 5 show an inlet assembly, the mouldable acoustic tubular device (7) is applied inside the clean air passage tube (5) by partial coupling, it being noted that in this example of application to the acoustical tubular device (7) - also shown separately on Figure 4, which shows a lateral cross-section of tube (5), having the device (7) internally coupled thereto - is given a straight tubular shape.
- One end (7-A) of device (7) extends beyond the limit of the tube (5) mouth and penetrates (7-A) inside the lower compartment (2) clean air exit nozzle (2-A) of the conventional air filter, being able to penetrate inside said clean air compartment (2).
- Figure 2 also shows the sequence of aspiration of dirty air - shown by larger arrows (S-1); accordingly, the air drawn by dirty air inlet nozzle (1-A) passes through the upper compartment (1) and through the filtering element (3); the already cleaned air then enters the air filter's lower compartment (2), and the clean air flow - shown by larger arrows (S-2) passes through the clean air exit nozzle (2-A) and subsequently through the inner portion of the acoustic tubular device (7) and the clean air passage tube (5) and thence to the vehicle engine's interior, through the carburetor (6), whereby, simultaneously and inversely to the trajectory described above, a sequence of inlet noises takes place by means of sound waves - shown in sequence by bold arrows (S-3) which will be initially absorbed by the acoustic tubular device (7) and subsequently absorbed by the conventional acoustic and internal devices coupled inside the air filter's lower (2) and upper (1) compartments, and finally absorbed by the conventional external acoustic devices coupled
- the acoustic tubular device (7) may entirely or partially dispense with the utilisation of the above-mentioned conventional acoustic devices.
- Figure 5 is a lateral cross-sectional view of the conventional clean air passage tube (5), having the mouldable acoustic tubular device (7) applied by total coupling to the interior thereof, it being noted that in this example of application of the device (7) a tubular shape is provided in accordance with the internal and broken characteristics of the conventional tube (5). It is further noted that in this example, the end (7-A) of device (7) does not extend beyond the limit of the tube mouth (5) whereby, as a result, the end (7-A) will not penetrate the inside of the clean air exit nozzle (2-A) of the conventional air filter, as could penetrate nozzle (2-A) and the clean air compartment (2).
- the mouldable acoustic tubular device (7) is manufactured of an acoustic absorbing material provided with pores, or manufactured with a set of acoustic materials, all having controlled porosity.
- this could be a porous, non-woven polyester.
- this set of materials could comprise porous paper, perforated aluminium and cotton tissue superimposed to and glued to each other.
- a thermo-pressing machine or a mould, or a circular weaving machine, or another appropriate manufacture process.
- the technical effect caused by the mouldable acoustic device (7) is that of absorbing the sound waves, it being observed that in the device (7) has shown excellent acoustic conditions, whereby an intake assembly employing the device (7) inside the clean air passage tube (5) there will be a significant decibel gain.
Abstract
vrom the relevant compartments.
Description
Claims (11)
- An acoustic device for an air intake component of a vehicle engine, the acoustic device being mouldable to a predetermined shape configured to fit internally of an air intake component according to the internal and acoustic characteristics of the component, the mouldable device comprising an acoustic absorbing material which is preferably porous.
- An acoustic device according to claim 1, which comprises a lining mouldable to the predetermined shape configured to fit internally of the component, the lining preferably comprising a sheet or plate.
- An acoustic device according to claim 1 or claim 2, wherein the device is mouldable to form an article of box-like or tubular configuration preferably comprising one or more sheets or plates of porous acoustic absorbing material, further preferably being superimposed and bonded to one another where a plurality of sheets and plates are provided.
- An acoustic device according to any of claims 1 to 3, wherein the device is mouldable by thermopressing or the like manufacturing process.
- An acoustic device according to any preceding claim, wherein the device is mouldable to be configured to be internally coupled to a vehicle engine's air filter being coupled inside an air filter provided with an upper compartment (1) having a dirty air inlet nozzle (1-A) and a circular opening (1-A1) made on the wall of compartment (1) the air filter element (3) being pressed between the filter's upper (1) and lower (2) compartments and preferably tie internal supports (4) of said air filter element, with advantageously a circular opening (2-A1) made on the wall of compartment (2), followed by purified air exit nozzle (2-A) towards the inside of the vehicle's engine.
- An acoustic device according to claim 5, comprising a box-shaped structure (5) that can be coupled (typically by gluing) and optionally removable, provided with a circular lateral opening (5-A) coinciding with the circular lateral opening (1-A1, 2-A1) of compartment (1,2), the box-shaped lining device (5) being open in the direction of positioning with the air filter element (3).
- An acoustic device internally coupled to a vehicle engine's air filter according to claim 4 or 5, wherein the lining (5) internally lines the air filter's upper compartment (1) and/or lower compartment (2).
- An acoustic device according to any of claims 1 to 4, wherein the device is mouldable to a tubular configuration to be coupled internally in the clean air tube of a vehicle's engine inlet assembly, attached to the inside of the conventional clean air passage tube (5) (typically made of rubber or plastics), interconnecting the air filter (2) compartment clean air exit nozzle (2-A) and the carburetor (6), the acoustic tubular device preferably being made by a thermo-pressing machine, or a mould, or a circular weaving machine, or another appropriate manufacture process, with a predetermined shape configured to the inner characteristics of the clean air tube (5) to which it is to be applied.
- An acoustic tubular device to be coupled internally in the clean air tube of a vehicle's engine inlet assembly, according to claim 8, wherein the tubular device (7) is an acoustic internal lining (typically applied by gluing) to the inside of the clean air tube (5).
- An acoustic tubular device to be coupled internally in the clean air tube of a vehicle's engine inlet assembly, according to claim 8 or 9, wherein the tubular device (7) is partially or totally coupled along the inside of tube (5), with an end (7-A) optionally extending beyond the limit of tube (5) in the latter's coupling with the clean air exit nozzle (2-A).
- An acoustic tubular device coupled internally in the clean air tube of a vehicle's engine inlet assembly, according to claim 10, wherein the end (2-A) of tubular lining (7) penetrates inside the nozzle (2-A) or penetrates inside nozzle (2-A) and the filter's clean air compartment (2).
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR9602968A BR9602968A (en) | 1996-06-24 | 1996-06-24 | Moldable and internally attachable acoustic device in vehicle engine air filter |
BR9602968 | 1996-06-24 | ||
BR9603046 | 1996-07-01 | ||
BR9603046A BR9603046A (en) | 1996-07-01 | 1996-07-01 | Shaped acoustic tubular device and internally attachable to the clean air tube of the vehicle engine intake manifold |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0837238A2 true EP0837238A2 (en) | 1998-04-22 |
EP0837238A3 EP0837238A3 (en) | 1998-10-28 |
EP0837238B1 EP0837238B1 (en) | 2003-06-04 |
Family
ID=25664774
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97304416A Expired - Lifetime EP0837238B1 (en) | 1996-06-24 | 1997-06-24 | Mouldable acoustic devices |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0837238B1 (en) |
DE (1) | DE69722555T2 (en) |
ES (1) | ES2201247T3 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002084099A1 (en) * | 2001-04-11 | 2002-10-24 | Donaldson Company, Inc. | Filter assemblies and systems for intake air for fuel cells |
WO2003023884A2 (en) * | 2001-09-11 | 2003-03-20 | Donaldson Company, Inc. | Integrated systems for use with fuel cells, and methods |
WO2003023217A1 (en) | 2001-09-12 | 2003-03-20 | Woco Franz Josef Wolf & Co. Gmbh | Fluid guideline, especially in the form of a tube for taking up untreated air in an air filter of a motor vehicle |
US6780534B2 (en) | 2001-04-11 | 2004-08-24 | Donaldson Company, Inc. | Filter assembly for intake air of fuel cell |
US6783881B2 (en) | 2001-04-11 | 2004-08-31 | Donaldson Company, Inc. | Filter assembly for intake air of fuel cell |
US7416580B2 (en) | 2001-04-11 | 2008-08-26 | Donaldsom Company, Inc. | Filter assemblies and systems for intake air for fuel cells |
EP2148075A1 (en) * | 2008-07-21 | 2010-01-27 | GE Jenbacher GmbH & Co. OHG | Air filter for combustion engine |
EP2990636A1 (en) * | 2014-08-26 | 2016-03-02 | Westaflex Tubos Flexiveis Ltda. | Anti-pollution porous flex pipe |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009037056A1 (en) * | 2009-08-13 | 2011-02-17 | Poroson Gmbh | Air filter, particularly for intake system of internal combustion engine, comprises housing forming cavity, which has filter material, and sound proofing unit, which has perforated wall |
DE102010038634A1 (en) | 2010-07-29 | 2012-02-02 | Poroson Gmbh | Air filter for suction system of internal combustion engine of vehicle, has sound damping device comprising circumferential wall within which sound damping element is arranged, where sound damping element runs in axis direction of wall |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6026157A (en) * | 1983-07-20 | 1985-02-09 | Nissan Motor Co Ltd | Air cleaner for internal-combustion engine |
DE3429633A1 (en) * | 1984-08-11 | 1986-02-20 | Ing. Walter Hengst GmbH & Co KG, 4400 Münster | Sound-absorbing air intake filter for an internal combustion engine |
EP0195121A1 (en) * | 1985-01-26 | 1986-09-24 | Dr.Ing.h.c. F. Porsche Aktiengesellschaft | Method for coating tubes and conduits |
JPS62121859A (en) * | 1985-11-22 | 1987-06-03 | Yamaha Motor Co Ltd | Air cleaner for internal combustion engine |
JPS62174560A (en) * | 1986-01-27 | 1987-07-31 | Mazda Motor Corp | Intake air duct structure for engine |
DE3707617A1 (en) * | 1987-03-10 | 1988-09-22 | Audi Ag | Intake pipe for an internal combustion engine |
EP0435588A2 (en) * | 1989-12-27 | 1991-07-03 | CADILLAC RUBBER & PLASTICS, INC. | Air intake duct and method for making same |
WO1993019291A1 (en) * | 1992-03-14 | 1993-09-30 | Illbruck Gmbh | Silencer for a flowing gaseous medium, in particular combustion air in an internal combustion engine |
-
1997
- 1997-06-24 DE DE69722555T patent/DE69722555T2/en not_active Expired - Lifetime
- 1997-06-24 ES ES97304416T patent/ES2201247T3/en not_active Expired - Lifetime
- 1997-06-24 EP EP97304416A patent/EP0837238B1/en not_active Expired - Lifetime
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6026157A (en) * | 1983-07-20 | 1985-02-09 | Nissan Motor Co Ltd | Air cleaner for internal-combustion engine |
DE3429633A1 (en) * | 1984-08-11 | 1986-02-20 | Ing. Walter Hengst GmbH & Co KG, 4400 Münster | Sound-absorbing air intake filter for an internal combustion engine |
EP0195121A1 (en) * | 1985-01-26 | 1986-09-24 | Dr.Ing.h.c. F. Porsche Aktiengesellschaft | Method for coating tubes and conduits |
JPS62121859A (en) * | 1985-11-22 | 1987-06-03 | Yamaha Motor Co Ltd | Air cleaner for internal combustion engine |
JPS62174560A (en) * | 1986-01-27 | 1987-07-31 | Mazda Motor Corp | Intake air duct structure for engine |
DE3707617A1 (en) * | 1987-03-10 | 1988-09-22 | Audi Ag | Intake pipe for an internal combustion engine |
EP0435588A2 (en) * | 1989-12-27 | 1991-07-03 | CADILLAC RUBBER & PLASTICS, INC. | Air intake duct and method for making same |
WO1993019291A1 (en) * | 1992-03-14 | 1993-09-30 | Illbruck Gmbh | Silencer for a flowing gaseous medium, in particular combustion air in an internal combustion engine |
Non-Patent Citations (3)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 009, no. 149 (M-390), 25 June 1985 & JP 60 026157 A (NISSAN JIDOSHA KK), 9 February 1985 * |
PATENT ABSTRACTS OF JAPAN vol. 011, no. 339 (M-639), 6 November 1987 & JP 62 121859 A (YAMAHA MOTOR CO LTD), 3 June 1987 * |
PATENT ABSTRACTS OF JAPAN vol. 012, no. 014 (M-659), 16 January 1988 & JP 62 174560 A (MAZDA MOTOR CORP), 31 July 1987 * |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7138008B2 (en) | 2001-04-11 | 2006-11-21 | Donaldson Company, Inc. | Filter assemblies and systems for intake air for fuel cells |
US6783881B2 (en) | 2001-04-11 | 2004-08-31 | Donaldson Company, Inc. | Filter assembly for intake air of fuel cell |
US7416580B2 (en) | 2001-04-11 | 2008-08-26 | Donaldsom Company, Inc. | Filter assemblies and systems for intake air for fuel cells |
WO2002084099A1 (en) * | 2001-04-11 | 2002-10-24 | Donaldson Company, Inc. | Filter assemblies and systems for intake air for fuel cells |
US6797027B2 (en) | 2001-04-11 | 2004-09-28 | Donaldson Company, Inc. | Filter assemblies and systems for intake air for fuel cells |
US6780534B2 (en) | 2001-04-11 | 2004-08-24 | Donaldson Company, Inc. | Filter assembly for intake air of fuel cell |
WO2003023884A3 (en) * | 2001-09-11 | 2004-02-19 | Donaldson Co Inc | Integrated systems for use with fuel cells, and methods |
WO2003023884A2 (en) * | 2001-09-11 | 2003-03-20 | Donaldson Company, Inc. | Integrated systems for use with fuel cells, and methods |
US6951697B2 (en) | 2001-09-11 | 2005-10-04 | Donaldson Company, Inc. | Integrated systems for use with fuel cells, and methods |
US7249652B2 (en) | 2001-09-12 | 2007-07-31 | Woco Industrietechnik Gmbh | Fluid guideline, especially in the form of a tube for taking up untreated air in an air filter of a motor vehicle |
DE10144972C1 (en) * | 2001-09-12 | 2003-05-15 | Woco Franz Josef Wolf & Co Gmbh | Fluid guidance, in particular in the form of a raw air hose for sucking raw air into an air filter of a motor vehicle |
WO2003023217A1 (en) | 2001-09-12 | 2003-03-20 | Woco Franz Josef Wolf & Co. Gmbh | Fluid guideline, especially in the form of a tube for taking up untreated air in an air filter of a motor vehicle |
EP2148075A1 (en) * | 2008-07-21 | 2010-01-27 | GE Jenbacher GmbH & Co. OHG | Air filter for combustion engine |
EP2990636A1 (en) * | 2014-08-26 | 2016-03-02 | Westaflex Tubos Flexiveis Ltda. | Anti-pollution porous flex pipe |
Also Published As
Publication number | Publication date |
---|---|
DE69722555D1 (en) | 2003-07-10 |
EP0837238B1 (en) | 2003-06-04 |
ES2201247T3 (en) | 2004-03-16 |
DE69722555T2 (en) | 2004-04-29 |
EP0837238A3 (en) | 1998-10-28 |
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