DE10152581A1 - Pipe for conducting air or other gaseous media, in particular, for motor vehicles is made of a sintered material - Google Patents

Pipe for conducting air or other gaseous media, in particular, for motor vehicles is made of a sintered material

Info

Publication number
DE10152581A1
DE10152581A1 DE10152581A DE10152581A DE10152581A1 DE 10152581 A1 DE10152581 A1 DE 10152581A1 DE 10152581 A DE10152581 A DE 10152581A DE 10152581 A DE10152581 A DE 10152581A DE 10152581 A1 DE10152581 A1 DE 10152581A1
Authority
DE
Germany
Prior art keywords
pipe
air
motor vehicles
pipeline
sintered material
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.)
Withdrawn
Application number
DE10152581A
Other languages
German (de)
Inventor
Sascha Bauer
Robert Vaculik
Franc Pricken
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mann and Hummel GmbH
Original Assignee
Filterwerk Mann and Hummel GmbH
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 Filterwerk Mann and Hummel GmbH filed Critical Filterwerk Mann and Hummel GmbH
Priority to DE10152581A priority Critical patent/DE10152581A1/en
Publication of DE10152581A1 publication Critical patent/DE10152581A1/en
Withdrawn legal-status Critical Current

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
    • F02M35/10314—Materials for intake systems
    • F02M35/10321—Plastics; Composites; Rubbers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/02—Moulding by agglomerating
    • B29C67/04—Sintering
    • 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
    • F02M35/10013—Means upstream of the air filter; Connection to the ambient air
    • 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
    • F02M35/10118—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements with variable cross-sections of intake ducts along their length; Venturis; Diffusers
    • 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
    • F02M35/1015—Air intakes; Induction systems characterised by the engine type
    • F02M35/10157—Supercharged engines
    • 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
    • F02M35/12—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
    • 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
    • F02M35/1277—Reinforcement of walls, e.g. with ribs or laminates; Walls having air gaps or additional sound damping layers
    • 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
    • F02M35/1283—Manufacturing or assembly; Connectors; Fixations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/006—Pressing and sintering powders, granules or fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/02—Bending or folding
    • B29C53/08—Bending or folding of tubes or other profiled members
    • B29C53/083—Bending or folding of tubes or other profiled members bending longitudinally, i.e. modifying the curvature of the tube axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0001—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular acoustical properties
    • B29K2995/0002—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular acoustical properties insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/22—Tubes or pipes, i.e. rigid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/08—Insulating elements, e.g. for sound insulation
    • B60R13/0884—Insulating elements, e.g. for sound insulation for mounting around noise sources, e.g. air blowers
    • 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
    • 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

Abstract

The pipe for conducting air or other gaseous media, in particular, for motor vehicles is made of a sintered material.

Description

Gebiet der ErfindungField of the Invention

Die vorliegende Erfindung betrifft Rohre für die Durchleitung von Luft oder anderen gasförmigen Medien. Insbesondere betrifft die Erfindung solche Rohrleitungen für das Ansaugen von Luft in Kraftfahrzeugen. The present invention relates to pipes for the passage of air or other gaseous media. In particular concerns the invention such pipelines for drawing air in Motor vehicles.

Hintergrund der Erfindung, Stand der TechnikBackground of the Invention, State of the Art

Die Erfindung betrifft insbesondere Rohrleitungen, die in Kraftfahrzeugen dazu verwendet werden, Verbrennungsluft in Richtung des Verbrennungsmotors zu leiten. Diese Rohrleitungen können entweder vor oder hinter einem Luftfilter angeordnet sein. Im Falle einer Anordnung vor einem Luftfilter wird durch diese Rohrleitungen die Rohluft transportiert, im Falle einer Anordnung nach einem Luftfilter transportieren diese Leitungen Reinluft. The invention particularly relates to pipelines which are in Motor vehicles are used to burn combustion air in Direction of the internal combustion engine. These pipelines can be placed either in front of or behind an air filter his. In the event of an arrangement in front of an air filter, through this piping transports the raw air, in the case of a Arrangement after an air filter transport these lines Clean air.

Es ist bekannt, dass die Kraftfahrzeugindustrie insbesondere an einer Reduzierung der Geräuschemissionen der Kraftfahrzeuge interessiert ist. So ist man bestrebt, vor allem die Einlassgeräusche bei Lufteinlaßvorrichtungen zu reduzieren. It is known that the automotive industry in particular a reduction in noise emissions from motor vehicles is interested. So you strive, especially the Reduce intake noise from air intake devices.

Zu diesem Zweck sind bereits mehrere Lösungen angeregt worden. So wird bspw. in der US-A-5,603,358 ein flexibles, zylindrisches Rohr vorgeschlagen, das der Zuführung von Luft zu einer Verbrennungsmaschine dient, wobei dieses Rohr mindestens eine zylindrische Ummantelung umfasst, die aus einem weichen und geräusch-absorbierenden Material besteht. Several solutions have already been proposed for this purpose. For example, US-A-5,603,358 becomes a flexible, cylindrical one Pipe proposed that the supply of air to a Internal combustion engine is used, this pipe at least one includes cylindrical sheathing that is made of a soft and noise absorbing material.

In der US-A-5,962,820 wird eine röhrenförmige Vorrichtung offenbart, die in der Reinluftansaugleitung einer Lufteinlasseinrichtung eines Kraftfahrzeugs angeordnet ist. Diese Vorrichtung besteht aus einem akustisch absorbierenden Material, das mit einer vorgegebenen Porosität ausgestattet ist, bzw. aus einem Verbundstoff mit diesen Eigenschaften. Die röhrenförmige Vorrichtung absorbiert auf diese Weise Geräuschwellen, die durch die Lufteinlasseinrichtung des Kraftfahrzeugs verursacht werden. US-A-5,962,820 discloses a tubular device discloses the one in the clean air intake line Air intake device of a motor vehicle is arranged. This device consists of an acoustically absorbent Material with a given porosity, or from a composite with these properties. The tubular device absorbs in this way Sound waves caused by the air intake device of the Motor vehicle caused.

Schließlich wird in der US-A-6,234,211 eine Rohrleitung für die Durchleitung von gasförmigen Stoffen, hauptsächlich in Kraftfahrzeugen, beschrieben, die ein poröses inneres Rohr, das durchlässig ist für die durchzuleitenden gasförmigen Stoffe und dabei die Geräuschweiterleitung verringert, sowie ein äußeres Rohr aufweist, das im wesentlichen starr ist und eine Umhüllung in einem Abstand von dem inneren Rohr bildet, wobei das äußere Rohr aus einem Material besteht, das im wesentlichen undurchlässig für gasförmige Stoffe ist. Finally, in US-A-6,234,211 a pipeline for the Passage of gaseous substances, mainly in Motor vehicles described having a porous inner tube that is permeable to the gaseous substances and thereby reducing noise transmission, as well as an external one Has tube that is substantially rigid and an envelope forms at a distance from the inner tube, the outer Pipe is made of a material that is essentially is impermeable to gaseous substances.

Die oben beschriebenen Lösungen basieren im wesentlichen auf einer porösen Polyester-Struktur. Die Nachteile einer solchen Struktur liegen u. a. in einem verbesserungswürdigen Dämmverhalten und in der beschriebenen Doppelrohr-Anordnung. The solutions described above are essentially based on a porous polyester structure. The disadvantages of such Structure lie u. a. in a room for improvement Insulation behavior and in the described double pipe arrangement.

Zusammenfassung der ErfindungSummary of the invention

Es ist daher die Aufgabe der vorliegenden Erfindung, die genannten Nachteile des Standes der Technik zu vermeiden und eine einfache, kostengünstig herstellbare Rohrleitung zu schaffen, die eine verbessertes Dämmverhalten gewährleistet. It is therefore the object of the present invention that to avoid mentioned disadvantages of the prior art and a simple, inexpensive to manufacture pipe create that ensures an improved insulation behavior.

Diese und weitere Aufgaben werden durch die Rohrleitung nach Anspruch 1 gelöst. These and other tasks are carried out by the pipeline Claim 1 solved.

Weitere vorteilhafte Ausgestaltungen sind in den Unteransprüchen enthalten. Further advantageous configurations are in the subclaims contain.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Die Erfindung wird im folgenden anhand der Zeichnungen näher erläutert. Dabei zeigt The invention will now be described with reference to the drawings explained. It shows

Fig. 1 schematisch die Verwendung der erfindungsgemässen Rohrleitung als Ansaugluftleitung vor einem Luftfilter; und Fig. 1 shows schematically the use of the inventive pipe as intake air line in front of an air filter; and

Fig. 2 schematisch die Verwendung der erfindungsgemässen Rohrleitung als Akustikrohr in einem geräuschgekapselten Gehäuse. Fig. 2 shows schematically the use of the pipeline according to the invention as an acoustic pipe in a soundproof housing.

Detaillierte Beschreibung der AusführungsbeispieleDetailed description of the exemplary embodiments

Die erfindungsgemässe Rohrleitung besteht aus einem gesinterten Polyamid-, Polyethylen- oder Polypropylen-Material. Bevorzugt werden hochmolekulare Materialien verwendet. The pipeline according to the invention consists of a sintered one Polyamide, polyethylene or polypropylene material. Prefers high molecular weight materials are used.

Die Herstellung erfolgt durch Füllen der entsprechenden Form mit dem hochmolekularen Material, anschliessendes Sintern im Sinterofen, Formgebung und Erkaltenlassen. Die Formgebung kann entweder gleichzeitig mit dem Sintern des Materialpulvers oder aber nachträglich erfolgen. The production takes place by filling the corresponding form with the high molecular material, then sintering in Sintering furnace, shaping and cooling. The shape can either simultaneously with the sintering of the material powder or but done later.

Durch die Verwendung eines gesinterten Kunststoffmaterials unterschiedlicher Dichte, abhängig von der Größe der Pulverkörnung, lässt sich eine höhere Geräuschdämpfung (Dämmung) erreichen. Weitere Vorteile sind die Kosteneinsparung durch ein gegenüber dem Stand der Technik vereinfachtes Herstellverfahren, eine höhere Flexibilität im Gegensatz zu starr gespritzten Ansaugrohren und ein höherer Luftzugang zum Filter bis zu einem maximalen Volumenstrom durch die poröse Oberfläche. Eine Warmluftansaugung vom Motorraum soll dabei vermieden werden, was durch ein Verhältnis Frischluft/Warmluft von z. B. 90%/10% erreicht werden kann. By using a sintered plastic material different density, depending on the size of the Powder grain, higher noise reduction (insulation) to reach. Further advantages are the cost saving through simplified manufacturing process compared to the prior art, a higher flexibility as opposed to rigid injection Intake pipes and a higher air access to the filter up to one maximum volume flow through the porous surface. A Warm air intake from the engine compartment should be avoided by a ratio of fresh air / warm air of z. B. 90% / 10% can be achieved.

Wie aus Fig. 1 zu ersehen ist, kann die erfindungsgemässe Rohrleitung zum einen als Rohluftleitung 2 in der Anordnung vor einem Luftfilter 4 angewendet werden (entweder gerade oder gebogen), zum anderen ist es auch möglich, den gesamten Rohluftansaugbereich A-A', das heisst, sowohl die Rohluftleitung 2 vor dem Luftfilter 4 als auch das rohluftseitige Gehäuse 6 des Filters, mit der erfindungsgemässen Rohrleitung auszustatten. As can be seen from Fig. 1, the pipe according to the invention can be used on the one hand as a dirty air pipe 2 in the arrangement in front of an air filter 4 (either straight or curved), on the other hand it is also possible to use the entire dirty air intake area A-A ', the This means that both the raw air line 2 in front of the air filter 4 and the raw air side housing 6 of the filter are to be equipped with the pipeline according to the invention.

Eine weitere Verwendungsmöglichkeit zeigt Fig. 2, in der der Einsatz als Akustikrohr 8 in geräuschgekapselten Gehäusen 10 zur Dämmung von Kompressorsauggeräuschen, bspw. im Kraftfahrzeugbereich gezeigt ist. Die Geräuscherzeuger 12 sind dabei bspw. unter einer Dämmhaube 14 angebracht, die innenliegend eine Dämmschicht 16 (beide nur ansatzweise gezeigt) aufweist. Das Kapselvolumen wird dabei als Geräuschdämpfung der Ansauggeräusche durch das schalldurchlässige und filtrierende Rohrelement genutzt. A further possible use is shown in FIG. 2, in which the use as an acoustic pipe 8 in noise-encapsulated housings 10 for the insulation of compressor suction noises, for example in the motor vehicle area, is shown. The noise generators 12 are, for example, attached under an insulation hood 14 which has an insulation layer 16 on the inside (both only shown to a certain extent). The capsule volume is used to dampen the intake noise through the sound-permeable and filtering tube element.

Claims (8)

1. Rohrleitung (2, 8) zum Durchleiten von Luft und/oder anderen gasförmigen Medien, insbesondere bei Kraftfahrzeugen, dadurch gekennzeichnet, dass die Rohrleitung aus gesintertem Material besteht. 1. Pipe ( 2 , 8 ) for passing air and / or other gaseous media, in particular in motor vehicles, characterized in that the pipeline consists of sintered material. 2. Rohrleitung nach Anspruch 1, dadurch gekennzeichnet, dass sie aus Polyamid, Polyethylen- oder Polypropylen besteht. 2. Pipe according to claim 1, characterized in that it consists of polyamide, polyethylene or polypropylene. 3. Rohrleitung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass hochmolekulare Materialien verwendet werden. 3. Pipe according to claim 1 or 2, characterized in that high molecular weight materials are used. 4. Verfahren zur Herstellung einer Rohrleitung (2, 8) nach einem der Ansprüche 1 bis 3, gekennzeichnet durch folgende Schritte: a) Einfüllen eines hochmolekularen Kunststoffpulvers in die entsprechende Form; b) Sintern des Materialpulvers; und c) Formgebung und Erkalten der resultierenden Form 4. A method for producing a pipeline ( 2 , 8 ) according to one of claims 1 to 3, characterized by the following steps: a) filling a high molecular weight plastic powder into the appropriate form; b) sintering the material powder; and c) shaping and cooling of the resulting shape 5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass die Formgebung gleichzeitig mit der Sinterung erfolgt. 5. The method according to claim 4, characterized in that the Shaping takes place simultaneously with the sintering. 6. Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass die Formgebung nachträglich erfolgt. 6. The method according to claim 4, characterized in that the Shaping is done subsequently. 7. Verwendung der Rohrleitung nach einem der Ansprüche 1 bis 3 als Rohluftleitung vor einem Luftfilter. 7. Use of the pipeline according to one of claims 1 to 3 as a raw air line in front of an air filter. 8. Verwendung der Rohrleitung nach einem der Ansprüche 1 bis 3 als Akustikrohr in geräuschgekapselten Gehäusen. 8. Use of the pipeline according to one of claims 1 to 3 as an acoustic pipe in soundproof housings.
DE10152581A 2001-10-24 2001-10-24 Pipe for conducting air or other gaseous media, in particular, for motor vehicles is made of a sintered material Withdrawn DE10152581A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE10152581A DE10152581A1 (en) 2001-10-24 2001-10-24 Pipe for conducting air or other gaseous media, in particular, for motor vehicles is made of a sintered material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE10152581A DE10152581A1 (en) 2001-10-24 2001-10-24 Pipe for conducting air or other gaseous media, in particular, for motor vehicles is made of a sintered material

Publications (1)

Publication Number Publication Date
DE10152581A1 true DE10152581A1 (en) 2003-05-08

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DE10152581A Withdrawn DE10152581A1 (en) 2001-10-24 2001-10-24 Pipe for conducting air or other gaseous media, in particular, for motor vehicles is made of a sintered material

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10332610A1 (en) * 2003-07-17 2005-02-24 Siemens Ag Noise reduction system for use on combustion engines uses loud speaker in flow duct to cancel generated noise

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2134562A1 (en) * 1969-08-28 1973-01-25 Minnesota Mining & Mfg SMOOTH, TIGHTLY TOLERATED POROESE TUBES AND PROCESS FOR THEIR PRODUCTION
US6202702B1 (en) * 2000-01-06 2001-03-20 Shishiai-Kabushikigaisha Acoustic damping pipe cover

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2134562A1 (en) * 1969-08-28 1973-01-25 Minnesota Mining & Mfg SMOOTH, TIGHTLY TOLERATED POROESE TUBES AND PROCESS FOR THEIR PRODUCTION
US6202702B1 (en) * 2000-01-06 2001-03-20 Shishiai-Kabushikigaisha Acoustic damping pipe cover

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10332610A1 (en) * 2003-07-17 2005-02-24 Siemens Ag Noise reduction system for use on combustion engines uses loud speaker in flow duct to cancel generated noise

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