EP1425505A1 - Fluid guideline, especially in the form of a tube for taking up untreated air in an air filter of a motor vehicle - Google Patents
Fluid guideline, especially in the form of a tube for taking up untreated air in an air filter of a motor vehicleInfo
- Publication number
- EP1425505A1 EP1425505A1 EP02777066A EP02777066A EP1425505A1 EP 1425505 A1 EP1425505 A1 EP 1425505A1 EP 02777066 A EP02777066 A EP 02777066A EP 02777066 A EP02777066 A EP 02777066A EP 1425505 A1 EP1425505 A1 EP 1425505A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fluid guide
- dimensionally stable
- opening
- fluid
- members
- 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
- 239000012530 fluid Substances 0.000 title claims abstract description 26
- 239000000463 material Substances 0.000 claims abstract description 8
- 239000004033 plastic Substances 0.000 claims description 9
- 230000001681 protective effect Effects 0.000 claims description 7
- 239000004743 Polypropylene Substances 0.000 claims description 6
- 239000004744 fabric Substances 0.000 claims description 6
- -1 polypropylene Polymers 0.000 claims description 6
- 229920001155 polypropylene Polymers 0.000 claims description 6
- 239000011148 porous material Substances 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 239000003570 air Substances 0.000 description 41
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000013016 damping Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 2
- 239000011358 absorbing material Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
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
- F02M35/10314—Materials for intake systems
- F02M35/10321—Plastics; Composites; Rubbers
-
- 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
- F02M35/10091—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements
- F02M35/10137—Flexible ducts, e.g. bellows or hoses
-
- 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
- F02M35/10301—Flexible, resilient, pivotally or movable parts; Membranes
-
- 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
- F02M35/10314—Materials for intake systems
- F02M35/10334—Foams; Fabrics; Porous media; Laminates; Ceramics; Coatings
-
- 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
- F02M35/1034—Manufacturing and assembling intake systems
- F02M35/10354—Joining multiple sections together
- F02M35/1036—Joining multiple sections together by welding, bonding 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
- F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
- F02M35/1205—Flow throttling or guiding
- F02M35/1238—Flow throttling or guiding by using secondary connections to the ambient, e.g. covered by a membrane or a porous member
-
- 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
- F02M35/1272—Intake silencers ; Sound modulation, transmission or amplification using absorbing, damping, insulating or reflecting materials, e.g. porous foams, fibres, rubbers, fabrics, coatings or membranes
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/161—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general in systems with fluid flow
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
- F02B29/04—Cooling of air intake supply
- F02B29/045—Constructional details of the heat exchangers, e.g. pipes, plates, ribs, insulation, materials, or manufacturing and assembly
- F02B29/0475—Constructional details of the heat exchangers, e.g. pipes, plates, ribs, insulation, materials, or manufacturing and assembly the intake air cooler being combined with another device, e.g. heater, valve, compressor, filter or EGR cooler, or being assembled on a special engine location
-
- 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
- F02M35/1034—Manufacturing and assembling intake systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
- F05C2225/08—Thermoplastics
Definitions
- Fluid guidance in particular in the form of a raw air hose for sucking raw air into an air filter of a motor vehicle
- the invention relates to a fluid filling with at least two members made of acoustically essentially dense material and at least one opening for sound damping, an impedance change, in particular in the form of an impedance jump, of the flow resistance of the fluid flowing through the fluid guide between two adjacent members.
- unfiltered air hoses which are installed in motor compartments of motor vehicles in order to draw in or direct ambient air from the cooler to an air filter
- the manufacturer endeavors to reduce the noise level prevailing during engine operation.
- Two main methods were used in the automotive industry for this purpose.
- Either resonators are attached to unfiltered air hoses, or unfiltered air hoses are equipped with a so-called bypass hose, which allows certain frequencies to be filtered out.
- Technically refined resonators are supposed to filter out the widest possible spectrum in sound and can be detuned, while bypass paths can optionally be switched on or off by valve controls.
- JP 60050265 A discloses a porous pipe socket sintered from aluminum powder, which is connected to an air filter via a piece of hose.
- the porous, permeable pipe socket is characterized by a significantly reduced sound level with constant air supply efficiency.
- the pipe socket has the disadvantage of high material costs.
- EP 0 837 238 A2 teaches the use of a porous, moldable, sound-absorbing material with which the air filter or its feed lines can be lined on the inside.
- An additional, interconnected inner wall also entails increased additional costs for materials and production.
- EP 0 818 648 B1 discloses the use of a porous band material for the production of a hose.
- a tape is wound helically and glued in the form of a hose and used for noise reduction in the air duct in the engine compartment.
- a woven plastic is used as the porous material, which means that in addition to the actual shaping processing process, the production of the woven tape is also costly.
- Apertures for sound absorption in the event of changes in impedance are known per se in the prior art.
- a line section is known which is constructed from two interconnected shells, with openings for damping being arranged in the joint between the shells.
- a diffuser effect may be inherent in the line section, and the pipe wall thereof may be provided with bores.
- the known line section is very complex to construct.
- a generic fluid guide is known from GB 2 364 352 A.
- straight, rigid elements with openings are perforated and each arranged between flexible elements, wherein the flexible elements can be designed in the manner of a corrugated tube section.
- the introduction of openings in the straight elements must take place in coordination with the geometry of said elements, which is relatively time-consuming and costly in order to obtain a desired soundproofing.
- the object of the present invention is therefore to further develop the generic fluid guide in such a way that the disadvantages of the prior art of Teclinik are overcome, in particular to supply a raw air hose which is extremely inexpensive to manufacture and which also has a high degree of sound-reducing properties.
- the at least one opening is arranged in the region of the change in impedance between two adjacent members.
- a plurality of openings are arranged along the circumference of the fluid guide and / or each opening is essentially rectangular.
- the total area of the opening or the openings corresponds essentially to the cross-sectional area of the fluid guide, in particular in the area of its air intake end or its air outlet end.
- each opening be punched and / or covered with an open-pore, porous protective fabric.
- the structural members are made of a plastic, in particular polypropylene, preferably in an injection molded or blown manner.
- the protective fabric is a plastic fleece, in particular made of polypropylene, the protective fabric preferably being glued or welded to the members.
- the structural members comprise a bellows between two substantially dimensionally stable areas, preferably at least one opening each being arranged between the one substantially film-stable area and the bellows on the one hand and the bellows and the other substantially dimensionally stable area on the other. It can be provided that a substantially dimensionally stable area with a
- Radiator connector is connected or molded, and / or the other substantially dimensionally stable area is connected or molded with an air filter connector, for
- a device according to the invention is characterized by at least one curvature, preferably in one essentially dimensionally stable region, and / or at least one recess, preferably in the other, essentially dimensionally stable region.
- the invention is therefore based on the finding that openings in the wall, for example, of a raw air hose mounted in the engine compartment of a Kraftfal tool between the radiator and an air filter, in particular before and after members integrated into the raw air hose, at which an impedance change in the flow resistance occurs considerably Reduction of the noise level generated during engine operation, especially the noise at the intake of untreated air, i.e. at the radiator.
- a raw air hose is essentially a ⁇ / 4 resonator, in which sound absorption by reflection and / or interference takes place through the introduction of openings according to the invention.
- the dimensioning of the openings essentially represents a compromise solution between maximizing the flow resistance on the one hand and minimizing the acoustic resistance on the other hand. especially in the area of its outlet.
- stamping the openings, which should then be covered with an open-pore, porous material such as, for example, in the form of a polypropylene fleece, in order to avoid contamination of the raw air hose, has proven to be particularly practical.
- the structural members of the unfiltered air hose in particular in the form of a bellows between two essentially dimensionally stable areas, are blown out of a plastic, such as polypropylene, in one for manufacturing reasons, so that the openings can then simply be punched in. Furthermore, it is favorable for the production to weld the protective material of the openings onto the structural members. Overall, this results in a cost-effective raw air hose that is extremely effective. Further features and advantages of the invention result from the following description, in which an exemplary embodiment of the invention is explained in detail with the aid of a schematic drawing. It shows:
- Fig.l shows an embodiment of a raw air hose according to the invention in a perspective side view
- FIG. 1 shows a raw air hose 1 according to the invention, as can be installed in a motor vehicle between a radiator and an air filter (not shown in each case).
- the raw air hose 1 for example made of a plastic, has a flexible bellows 8 between essentially acoustically sealed and dimensionally stable areas 2, 3, at the respective ends 4, 5 of which there is a radiator connection piece 6 or an air filter connection piece 7.
- the dimensionally stable area 2 facing the air filter connecting piece 7 is additionally characterized by a K-shaped armor 9, while the opposite, dimensionally stable area 3 facing the radiator connecting piece 6 has a recess 10 to facilitate final assembly in the engine compartment (not shown) of the motor vehicle.
- each adhesive zone 12, 12 ' serves to prevent the ingress of dirt particles into the raw air hose 1 by applying an air-permeable fleece by means of adhesive beads (both not shown) via the openings 11, 11' in the area of the adhesive zone 12, 12 '.
- This fleece which can also be made of a plastic, can alternatively be welded to the walls of the raw air hose.
- the graph of FIG. 2 compares the damping of the muzzle noise, the muzzle being the end of the unfiltered air hose 1 facing the cooler, that is to say the end 4 of the cooler connector 6, plotted against excitation frequencies for three different types of unfiltered air hoses.
- Curve 1 represents the acoustic behavior of an unfiltered air hose which has a bellows but no porous walls and is also made of plastic, as is usually the case in the prior art.
- the Curve 2 represents the acoustic behavior of a flexible raw air hose which has been produced in accordance with the method disclosed in EP 0 818 648 B1.
- curve 3 represents the acoustic behavior of an unfiltered air hose 1 according to the invention.
- FIG. 2 clearly shows by comparing the three curves with one another the sound insulation of the unfiltered air hose 1 according to the invention, which is more effective over wide frequency ranges, compared to the unfiltered air hoses known from the prior art.
Landscapes
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Aviation & Aerospace Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Ceramic Engineering (AREA)
- Fluid Mechanics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Pipe Accessories (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Exhaust Silencers (AREA)
- Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
- Filtering Materials (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10144972 | 2001-09-12 | ||
DE10144972A DE10144972C1 (en) | 2001-09-12 | 2001-09-12 | Fluid guidance, in particular in the form of a raw air hose for sucking raw air into an air filter of a motor vehicle |
PCT/EP2002/010204 WO2003023217A1 (en) | 2001-09-12 | 2002-09-11 | Fluid guideline, especially in the form of a tube for taking up untreated air in an air filter of a motor vehicle |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1425505A1 true EP1425505A1 (en) | 2004-06-09 |
EP1425505B1 EP1425505B1 (en) | 2005-05-11 |
Family
ID=7698801
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02777066A Revoked EP1425505B1 (en) | 2001-09-12 | 2002-09-11 | Fluid guideline, especially in the form of a tube for taking up untreated air in an air filter of a motor vehicle |
Country Status (4)
Country | Link |
---|---|
US (1) | US7249652B2 (en) |
EP (1) | EP1425505B1 (en) |
DE (2) | DE10144972C1 (en) |
WO (1) | WO2003023217A1 (en) |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
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DE202004003141U1 (en) * | 2004-03-01 | 2004-06-17 | Rational Ag | Soundproofed burner system for a cooking device and cooking device with such a burner system |
DE202006003137U1 (en) * | 2006-02-24 | 2007-07-12 | Mann+Hummel Gmbh | Filter pipe |
DE102006040980B4 (en) * | 2006-08-31 | 2009-04-02 | Heinrich Gillet Gmbh | Acoustic device |
DE102006054270A1 (en) * | 2006-11-17 | 2008-05-21 | Veritas Ag | Assembly comprising an exhaust gas turbocharger, a charge air cooler and a charge air line |
JP2008231979A (en) * | 2007-03-19 | 2008-10-02 | Roki Co Ltd | Muffling chamber duct |
JP4771546B2 (en) * | 2007-03-22 | 2011-09-14 | 株式会社Roki | Silencer duct |
US20080236938A1 (en) * | 2007-03-30 | 2008-10-02 | Siemens Vdo Automotive, Inc. | Induction system duct with noise attenuating holes |
US8596398B2 (en) | 2007-05-16 | 2013-12-03 | Polaris Industries Inc. | All terrain vehicle |
FR2921123B1 (en) * | 2007-09-17 | 2015-06-19 | Mark Iv Systemes Moteurs Sa | COOLING CIRCUIT FOR POWER GASES PROPELLED BY A TURBOCHARGER |
JP4396753B2 (en) * | 2007-10-03 | 2010-01-13 | 株式会社デンソー | Silencer for refrigeration cycle |
DE202007018075U1 (en) | 2007-12-21 | 2009-05-14 | Mann+Hummel Gmbh | A filter assembly |
US8994494B2 (en) | 2008-10-10 | 2015-03-31 | Polaris Industries Inc. | Vehicle security system |
DE202010005261U1 (en) | 2010-04-20 | 2010-07-01 | Lainox Ali S.P.A., Vittorio Veneto | Pressure equalizer for connecting the air intake pipe with the socket of a manifold for burner, and convection or combi gas stove for cooking food, which is equipped with this device |
US10358187B2 (en) * | 2014-01-10 | 2019-07-23 | Polaris Industries Inc. | Snowmobile |
EP2812236B1 (en) | 2012-02-09 | 2016-11-02 | Polaris Industries Inc. | Snowmobile |
US9845004B2 (en) | 2014-01-10 | 2017-12-19 | Polaris Industries Inc. | Snowmobile |
DE102014010836B4 (en) * | 2014-07-24 | 2018-12-27 | Mann+Hummel Gmbh | Fluid pipe of a fluid line of a motor vehicle, motor vehicle and internal combustion engine with at least one fluid pipe |
DE102015202851A1 (en) * | 2015-02-17 | 2016-08-18 | Röchling Automotive SE & Co. KG | Fluid conduit means |
JP6992423B2 (en) * | 2017-11-09 | 2022-01-13 | トヨタ紡織株式会社 | Internal combustion engine inlet duct |
US10793181B2 (en) | 2018-02-13 | 2020-10-06 | Polaris Industries Inc. | All-terrain vehicle |
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DE1642857U (en) * | 1951-01-18 | 1952-08-28 | Mann & Hummel Filter | INTAKE NOISE SILENCER FOR COMPRESSORS AND OTHER AIR SUCTION PISTON MACHINES. |
US3061039A (en) * | 1957-11-14 | 1962-10-30 | Joseph J Mascuch | Fluid line sound-absorbing structures |
CA984693A (en) * | 1973-11-22 | 1976-03-02 | Bombardier Limited | Air intake silencer for a two-stroke internal combustion engine |
JPS5930209Y2 (en) * | 1975-04-19 | 1984-08-29 | 川崎重工業株式会社 | Motorcycle intake silencer |
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DE4217630C1 (en) * | 1992-05-28 | 1993-09-23 | Mercedes-Benz Aktiengesellschaft, 70327 Stuttgart, De | |
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FR2788833B1 (en) * | 1999-01-22 | 2001-03-16 | Mecaplast Sam | AIR NOISE REDUCTION DEVICE, MANUFACTURING METHOD AND USES OF SUCH A DEVICE |
DE19903165A1 (en) * | 1999-01-27 | 2000-08-03 | Mann & Hummel Filter | Suction device with a line section having openings |
JP2001073755A (en) * | 1999-09-01 | 2001-03-21 | Nakagawa Sangyo Kk | Exhaust pipe and exhaust system of internal combustion engine |
KR20010061229A (en) * | 1999-12-28 | 2001-07-07 | 이계안 | Intake system |
GB2364352A (en) * | 2000-07-03 | 2002-01-23 | Draftex Ind Ltd | Noise reduction in air conduits; making perforated conduits |
FR2814778B1 (en) * | 2000-09-29 | 2003-01-10 | Peugeot Citroen Automobiles Sa | CONDUIT FOR THE TRANSPORT OF GASEOUS FLUID AND AIR INTAKE DEVICE FOR AN INTERNAL COMBUSTION ENGINE COMPRISING SUCH A CONDUIT |
-
2001
- 2001-09-12 DE DE10144972A patent/DE10144972C1/en not_active Expired - Fee Related
-
2002
- 2002-09-11 EP EP02777066A patent/EP1425505B1/en not_active Revoked
- 2002-09-11 WO PCT/EP2002/010204 patent/WO2003023217A1/en not_active Application Discontinuation
- 2002-09-11 US US10/489,013 patent/US7249652B2/en not_active Expired - Fee Related
- 2002-09-11 DE DE50203102T patent/DE50203102D1/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO03023217A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE50203102D1 (en) | 2005-06-16 |
DE10144972C1 (en) | 2003-05-15 |
WO2003023217B1 (en) | 2004-01-08 |
EP1425505B1 (en) | 2005-05-11 |
US20040262076A1 (en) | 2004-12-30 |
US7249652B2 (en) | 2007-07-31 |
WO2003023217A1 (en) | 2003-03-20 |
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