DE3707617A1 - Intake pipe for an internal combustion engine - Google Patents

Intake pipe for an internal combustion engine

Info

Publication number
DE3707617A1
DE3707617A1 DE19873707617 DE3707617A DE3707617A1 DE 3707617 A1 DE3707617 A1 DE 3707617A1 DE 19873707617 DE19873707617 DE 19873707617 DE 3707617 A DE3707617 A DE 3707617A DE 3707617 A1 DE3707617 A1 DE 3707617A1
Authority
DE
Germany
Prior art keywords
lining
intake pipe
internal combustion
combustion engine
low
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Withdrawn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
DE19873707617
Other languages
German (de)
Inventor
Hartmut Dipl Ing Dr Bathelt
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.)
Audi AG
Original Assignee
Audi AG
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 Audi AG filed Critical Audi AG
Priority to DE19873707617 priority Critical patent/DE3707617A1/en
Publication of DE3707617A1 publication Critical patent/DE3707617A1/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Withdrawn legal-status Critical Current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
    • F02M35/10334—Foams; Fabrics; Porous media; Laminates; Ceramics; Coatings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/11—Thermal or acoustic insulation
    • F02B77/13—Acoustic insulation
    • 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
    • F02M35/1255—Intake silencers ; Sound modulation, transmission or amplification using resonance
    • F02M35/1266—Intake silencers ; Sound modulation, transmission or amplification using resonance comprising multiple chambers or compartments
    • 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

Abstract

An intake pipe 1 for the combustion air of an internal combustion engine has an acoustically efficient lining 2, which is designed as plate resonator for the absorption of low-frequency intake noises. For this purpose, the lining 2 is composed of a closed-cell material, which is arranged at a distance from the inner surface 4 of the pipe 1 and is supported on the inner surface 4 by way of webs 3. The inner surface 5 of the lining 2 is smooth, in order to keep the flow resistance of the combustion air low. <IMAGE>

Description

Die Erfindung bezieht sich auf ein Ansaugrohr für die Verbrennungsluft einer Brennkraftmaschine, das eine akustisch wirksame Auskleidung aufweist.The invention relates to an intake pipe for the combustion air of an internal combustion engine, the has an acoustically effective lining.

Es sind Ansaugrohre mit einer Auskleidung aus offenzelligem Material bekannt, das hochfrequente Ansauggeräusche eliminieren soll. Derartige Schall­ schluckstoffe haben jedoch einen schlechten Schluck­ grad für tiefe Frequenzen. Um tieffrequente Ansaug­ geräusche zu eliminieren, werden mehr oder weniger großvolumige Ansaugschalldämpfer in der Ansaugleitung vorgesehen. Die Unterbringung derartiger Schalldämpfer ist jedoch wegen der sehr beengten Raumverhältnisse im Motorraum von Kraftfahrzeugen problematisch.There are intake pipes with a lining known open-cell material, the high-frequency To eliminate suction noise. Such sound however, swallowing substances have a bad sip degrees for low frequencies. For low-frequency suction eliminating noise will be more or less large-volume intake silencers in the intake pipe intended. The placement of such silencers is because of the very cramped space problematic in the engine compartment of motor vehicles.

Der Erfindung liegt die Aufgabe zugrunde, eine Dämpfung der tieffrequenten Ansauggeräusche ohne großen zusätz­ lichen Raumbedarf zu erreichen.The invention has for its object a damping the low-frequency intake noises without much additional to achieve space requirements.

Zur Lösung dieser Aufgabe wird erfindungsgemäß ein Ansaugrohr vorgeschlagen, dessen akustisch wirksame Auskleidung als Plattenresonator zur Absorption tief­ frequenter Ansauggeräusche ausgebildet ist und aus einem geschlossenzelligen Material besteht, in einem Abstand von der Wand des Rohres angeordnet ist und sich über Stege an der Wand abstützt.To solve this problem, according to the invention Intake pipe proposed, its acoustically effective Lining as a plate resonator for deep absorption Frequent intake noise is formed and from a closed cell material, in one Distance from the wall of the tube is arranged and is supported by webs on the wall.

Durch den erfindungsgemäßen Vorschlag gelingt es, tieffrequente Ansauggeräusche zu eliminieren, wobei der zusätzliche Raumbedarf gering ist, da der Durch­ messer des Ansaugrohres lediglich in nicht nennens­ werter Weise vergrößert werden muß. The proposal according to the invention enables to eliminate low-frequency intake noise, whereby the additional space requirement is low because the through The diameter of the intake pipe is not specified value must be increased.  

Um zusätzlich zu der Absorption tieffrequenter Ansaug­ geräusche auch eine zumindest teilweise Dämpfung der hochfrequenten Ansauggeräusche zu erreichen, kann die Auskleidung aus einem geschlossenzelligen Schaumstoff­ material bestehen.In addition to the absorption of low-frequency suction noises also an at least partial damping of the to achieve high-frequency intake noises Closed cell foam liner material exist.

Vorzugsweise hat die Auskleidung eine kassettenförmige Außenfläche, mit der sie an der Wand des Ansaugrohres anliegt, jedoch eine glatte Innenfläche, um eine mög­ lichst verlustarme Luftströmung zu ermöglichen.The lining preferably has a cassette-shaped External surface with which they are on the wall of the intake pipe but there is a smooth inner surface to make it possible to enable the lowest possible loss of air flow.

Ein Ausführungsbeispiel der Erfindung wird im folgenden unter Bezugnahme auf die Zeichnung beschrieben, in derAn embodiment of the invention is as follows described with reference to the drawing in which

Fig. 1 einen Abschnitt eines Ansaugrohres im Teil- Längsschnitt, und Fig. 1 shows a section of an intake pipe in partial longitudinal section, and

Fig. 2 einen Schnitt entlang Linie 2-2 in Fig. 1 darstellt. Fig. 2 shows a section along line 2-2 in Fig. 1.

Mit 1 ist ein Ansaugrohr für die Verbrennungsluft einer nicht dargestellten Brennkraftmaschine bezeichnet, das in den ebenfalls nicht dargestellten Luftfilter mündet. In dem Ansaugrohr ist eine akustisch wirksame rohr­ förmige Auskleidung 2 angeordnet, die als Platten­ resonator zur Absorption tieffrequenter Ansauggeräusche ausgebildet ist. Zu diesem Zweck ist die Auskleidung 2 aus einem geschlossenzelligen Material und sie stützt sich über Stege 3 an der Innenfläche 4 des Ansaug­ rohres 1 ab. Die Stege 3 geben der Außenfläche der Auskleidung 2 eine kassettenartige Struktur, während die Innenfläche 5 der Auskleidung glatt ausgeführt ist, um den Strömungswiderstand für die Verbrennungs­ luft klein zu halten. 1 with an intake pipe for the combustion air of an internal combustion engine, not shown, which opens into the air filter, also not shown. In the intake pipe, an acoustically effective tubular lining 2 is arranged, which is designed as a plate resonator for absorbing low-frequency intake noise. For this purpose, the lining 2 is made of a closed-cell material and it is supported via webs 3 on the inner surface 4 of the intake pipe 1 . The webs 3 give the outer surface of the liner 2 a cassette-like structure, while the inner surface 5 of the liner is smooth to keep the flow resistance for the combustion air small.

Die tieffrequenten Druckpulsationen der angesaugten Luftsäule (Ansauggeräusch) bewirken eine elastische Verformung der Auskleidung 2. Dabei wird Schwingungs­ energie von der Luftsäule auf die Auskleidung 2 über­ tragen und in dieser durch Materialdämpfung dissipiert. Die Wand des Ansaugrohres 1 hat dabei lediglich die übliche Schalldämmfunktion einer festen Wand.The low-frequency pressure pulsations of the sucked-in air column (suction noise) cause an elastic deformation of the lining 2 . Vibration energy is transferred from the air column to the liner 2 and dissipates in it by material damping. The wall of the intake pipe 1 only has the usual sound insulation function of a fixed wall.

Die Auskleidung 2 kann aus einem geschlossenzelligen Schaumstoffmaterial bestehen, das von der Struktur her fest ist, jedoch eine gewisse Dämpfung auch der hoch­ frequenten Ansauggeräusche bewirkt. Das Ansaugrohr 1 kann aus einem beliebigen Material bestehen.The lining 2 can consist of a closed-cell foam material, which is structurally firm, but also causes a certain damping of the high-frequency suction noises. The intake pipe 1 can be made of any material.

Claims (3)

1. Ansaugrohr für die Verbrennungsluft einer Brennkraft­ maschine, das eine akustisch wirksame Auskleidung aufweist, dadurch gekennzeichnet, daß die Auskleidung (2) als Plattenresonator zur Ab­ sorption tieffrequenter Ansauggeräusche ausgebildet ist und aus einem geschlossenzelligen Material be­ steht, in einem Abstand von der Wand (4) des Rohres (1) angeordnet ist und sich über Stege (3) an dieser Wand (4) abstützt.1. Intake pipe for the combustion air of an internal combustion engine, which has an acoustically effective lining, characterized in that the lining ( 2 ) is designed as a plate resonator for absorption of low-frequency suction noise and is made of a closed-cell material, at a distance from the wall ( 4 ) of the tube ( 1 ) is arranged and is supported by webs ( 3 ) on this wall ( 4 ). 2. Ansaugrohr nach Anspruch 1, dadurch gekennzeichnet, daß die Auskleidung (2) aus einem geschlossen­ zelligen Schaumstoffmaterial besteht.2. Intake pipe according to claim 1, characterized in that the lining ( 2 ) consists of a closed cellular foam material. 3. Ansaugrohr nach Anspruch 1 oder 2, dadurch gekenn­ zeichnet, daß die Auskleidung (2) eine kassetten­ förmige Außenfläche, jedoch eine glatte Innen­ fläche (5) aufweist.3. Intake pipe according to claim 1 or 2, characterized in that the lining ( 2 ) has a cassette-shaped outer surface, but a smooth inner surface ( 5 ).
DE19873707617 1987-03-10 1987-03-10 Intake pipe for an internal combustion engine Withdrawn DE3707617A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19873707617 DE3707617A1 (en) 1987-03-10 1987-03-10 Intake pipe for an internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19873707617 DE3707617A1 (en) 1987-03-10 1987-03-10 Intake pipe for an internal combustion engine

Publications (1)

Publication Number Publication Date
DE3707617A1 true DE3707617A1 (en) 1988-09-22

Family

ID=6322664

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19873707617 Withdrawn DE3707617A1 (en) 1987-03-10 1987-03-10 Intake pipe for an internal combustion engine

Country Status (1)

Country Link
DE (1) DE3707617A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5649986A (en) * 1994-10-28 1997-07-22 Filtewerk Mann & Hummel Gmbh Filter for filtering the intake air of an internal combustion engine
EP0837238A2 (en) * 1996-06-24 1998-04-22 Westaflex Tubos Flexiveis Ltda. Mouldable acoustic devices
EP0892169A1 (en) * 1996-11-22 1999-01-20 Denso Corporation Intake device of internal combustion engine
EP0862012A3 (en) * 1997-02-17 1999-02-03 SOLVIS Solarsysteme GmbH Sound damping device for reducing fluid and body noise
DE10035809A1 (en) * 2000-07-22 2002-01-31 Mann & Hummel Filter Method for de=icing fluid duct has an elastic insert with trapped spaces connected to a variable pressure supply
US20200018272A1 (en) * 2018-07-10 2020-01-16 Ford Global Technologies, Llc Engine air induction resistive foam element sound absorber and silencer

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1692352U (en) * 1954-11-18 1955-02-03 Maschf Augsburg Nuernberg Ag SILENCERS, PARTICULARLY INTAKE SILENCERS.
DE7149162U (en) * 1973-05-30 Moeller Werke Gmbh Air exhaust line for internal combustion engines
DE3413998A1 (en) * 1984-04-13 1985-10-17 Peter 8999 Simmerberg Steinl Silencing system for combustion engines

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7149162U (en) * 1973-05-30 Moeller Werke Gmbh Air exhaust line for internal combustion engines
DE1692352U (en) * 1954-11-18 1955-02-03 Maschf Augsburg Nuernberg Ag SILENCERS, PARTICULARLY INTAKE SILENCERS.
DE3413998A1 (en) * 1984-04-13 1985-10-17 Peter 8999 Simmerberg Steinl Silencing system for combustion engines

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DE-Z: Schiff & Hafen 28, 1976, H.10, S.1002-1005 *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5649986A (en) * 1994-10-28 1997-07-22 Filtewerk Mann & Hummel Gmbh Filter for filtering the intake air of an internal combustion engine
EP0837238A2 (en) * 1996-06-24 1998-04-22 Westaflex Tubos Flexiveis Ltda. Mouldable acoustic devices
EP0837238B1 (en) * 1996-06-24 2003-06-04 Westaflex Tubos Flexiveis Ltda. Mouldable acoustic devices
EP0892169A1 (en) * 1996-11-22 1999-01-20 Denso Corporation Intake device of internal combustion engine
EP0892169A4 (en) * 1996-11-22 2000-06-28 Denso Corp Intake device of internal combustion engine
EP0862012A3 (en) * 1997-02-17 1999-02-03 SOLVIS Solarsysteme GmbH Sound damping device for reducing fluid and body noise
DE10035809A1 (en) * 2000-07-22 2002-01-31 Mann & Hummel Filter Method for de=icing fluid duct has an elastic insert with trapped spaces connected to a variable pressure supply
DE10035809B4 (en) * 2000-07-22 2010-05-12 Mann + Hummel Gmbh Device for de-icing a flow cross-section
US20200018272A1 (en) * 2018-07-10 2020-01-16 Ford Global Technologies, Llc Engine air induction resistive foam element sound absorber and silencer

Similar Documents

Publication Publication Date Title
DE2802896C2 (en) Rubber mounts with hydraulic damping
DE69532054T2 (en) Hose for gas transportation
DE4418433C2 (en) Brush arrangement for a vacuum cleaner with a sound absorbing system
DE19504223A1 (en) Intake silencer for internal combustion engine
DE4414566A1 (en) Air silencer
DE3536379A1 (en) Air duct, in particular in motor vehicles
DE19962888A1 (en) Filters, especially intake air filters
DE10060522A1 (en) Exhaust silencer for a fuel-operated heater
DE102017109319A1 (en) AIR CLEANER FOR INTERNAL COMBUSTION ENGINE
WO1993019291A1 (en) Silencer for a flowing gaseous medium, in particular combustion air in an internal combustion engine
DE2131410A1 (en) SILENCER
DE2513946C2 (en) Splitter silencer
DE3707617A1 (en) Intake pipe for an internal combustion engine
DE20314134U1 (en) Pneumatic blow-off silencer
DE3431078A1 (en) DEVICE FOR DAMPING THE INLET NOISE OF COMBUSTION ENGINES
DE19628090C2 (en) Noise protection device, especially for roadsides and tunnels
DE3317103C2 (en) Resonant, volume-changing resonator in the form of a silator
DE976032C (en) Silencer with branch filter and in-line filter
DE69722555T2 (en) Acoustic device made of injection-molded plastic
DE69815838T2 (en) TUBE FOR TRANSPORTING GAS-SHAPED MEDIA, ESPECIALLY IN MOTOR VEHICLES
DE60020231T2 (en) AIR INTAKE DEVICE FOR A INTERNAL COMBUSTION ENGINE
DE10304028A1 (en) Air filter for an internal combustion engine
DE1426198A1 (en) Silencer
DE1077085B (en) Arrangement for sound absorption of the exhaust system of internal combustion engines in motor vehicles and the like. like
DE2022851C3 (en) Exhaust system for internal combustion engines

Legal Events

Date Code Title Description
OM8 Search report available as to paragraph 43 lit. 1 sentence 1 patent law
8139 Disposal/non-payment of the annual fee