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DE721824C - Sound absorber on the inlet pipe between the engine and the muffler, especially for dampening idle noise - Google Patents

Sound absorber on the inlet pipe between the engine and the muffler, especially for dampening idle noise

Info

Publication number
DE721824C
DE721824C DEE54972D DEE0054972D DE721824C DE 721824 C DE721824 C DE 721824C DE E54972 D DEE54972 D DE E54972D DE E0054972 D DEE0054972 D DE E0054972D DE 721824 C DE721824 C DE 721824C
Authority
DE
Germany
Prior art keywords
sound
inlet pipe
engine
muffler
dampening
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.)
Expired
Application number
DEE54972D
Other languages
German (de)
Inventor
Alfred Kilgus
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.)
Eberspaecher Climate Control Systems GmbH and Co KG
Original Assignee
J Eberspaecher GmbH and Co KG
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 J Eberspaecher GmbH and Co KG filed Critical J Eberspaecher GmbH and Co KG
Priority to DEE54972D priority Critical patent/DE721824C/en
Application granted granted Critical
Publication of DE721824C publication Critical patent/DE721824C/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/003—Silencing apparatus characterised by method of silencing by using dead chambers communicating with gas flow passages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/24—Silencing apparatus characterised by method of silencing by using sound-absorbing materials

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pipe Accessories (AREA)

Description

Schallabschirmer am Eingangsrohr zwischen Motor und Schalldämpfer, insbesondere zum Dämpfen des Leerlaufgeräusches Der Gegenstand der vorliegenden Erfindung ist ein Schallabschirmer, der insbesondere das Leerlaufgeräusch dämpfen soll. Es konnte festgestellt «erden, daß" manche störenden Geräusche schon im Eingangsrohr zwischen Motor und Schalldämpfer auftreten. Dies gilt insbesondere für das Leerlaufgeräusch, welches besonders stark bei Zweitaktmc,t(,reii hervortritt.Sound absorber on the inlet pipe between the engine and the muffler, especially for damping idling noise The subject matter of the present Invention is a sound shield, which in particular attenuates the idling noise target. It was found that some disturbing noises were already in the inlet pipe occur between the engine and the muffler. This applies in particular to the idling noise, which is particularly pronounced with two-stroke mc, t (, reii.

Um nun diese Geräusche, da sie schon vor dem Schalldämpfer auftreten und daher durch den Schalldämpfer nicht gedämpft werden, zu beseitigen, wird nach dem Vorschlag der vorliegenden Erlindung das Eingangsrohr in an sich bekannter Weise mit Oftnungen versehen und mit einem wellenförmigen Mantel umschlossen, der außen in an sich bekannter Weise mit einem schallschluckenden Stoff umgeben ist. Dies kann dadurch geschehen, daß man den schallschluckenden Stoff, z. B. in Form von Asbestschnüren, in die Rillen des wellenförmigen Mantels w'ikkelt. Man kann entweder eine dicke Schnur, die jede Rille ausfüllt, verwenden oder mehrere dünne Schnüre, die nebeneinander in die Rillen gelegt werden.To these noises, since they occur before the silencer and therefore will not be attenuated by the muffler, to be eliminated after the proposal of the present invention the inlet pipe in a known manner provided with openings and enclosed with a wavy coat on the outside is surrounded in a manner known per se with a sound-absorbing substance. this can be done by using the sound-absorbing material, e.g. B. in the form of Asbestos cords, wrapped in the grooves of the wavy coat. You can either use a thick cord to fill each groove or several thin cords, which are placed next to each other in the grooves.

Schließlich kann nian das Wellrohr noch außerdem mit einem Mantel aus schallschlukkendem Stoff, z. B. mit einem Asbestmantel, versehen. Ferner kann die Abschirin Wirkung noch besonders dadurch .erhöht werden, daß der Raum zwischen Wehrohr und Eingangsrohr in an sich bekannter Weise auch mit einem schallschluckenden Stoff ausgefüllt wird. In der Zeichnung ist ein Ausführungsbeispiel des Eri-indungsgegenstandes dargestellt.Finally, the corrugated pipe can also be covered with a jacket made of sound-absorbing material, e.g. B. with an asbestos coat. Furthermore can the shielding effect can be increased especially by the fact that the space between Weir pipe and inlet pipe in a manner known per se, also with a sound-absorbing one Substance is filled out. The drawing shows an exemplary embodiment of the subject matter of the invention shown.

Die Ab"aslc-itung i ist mit Öffntmgen 2 versehen und von einem Wellrohr 3 umgeben. Der Raum zischen i und ; ist in dem Beispiel leer. Um das Wellrohr 3 sind Asbestschnüre 4. gewickelt, die in die Rillen zu liegen kommen. Außen ist das Wellrohr noch mit einem Asbestmantels überzogen.The ab "aslc-itung i is provided with openings 2 and from a corrugated pipe 3 surrounded. The room hisses i and; is empty in the example. Around the corrugated pipe 3 asbestos cords are wound 4. that come to rest in the grooves. Outside is that Corrugated pipe still covered with an asbestos jacket.

Claims (3)

PATENTANSPRÜCHE: i. Schallabschirmer am Eingangsrohr zwischen Motor und Schalldämpfer, insbesondere zum Dämpfen des Leerlauf-;eräusches, dadurch gekennzeichnet, daß das von einem wellenförmigen INlantel (3) umschlossene Eingangsrohr (i) in an sich bekannter Weise mit Öffnungen versehen und der Mantel in an sich bekannter Weise außen finit einem schallschluckenden Stoff umgeben ist. PATENT CLAIMS: i. Sound shield on the inlet pipe between the engine and silencers, in particular for damping idling; noise, characterized in that that the inlet pipe (i) enclosed by a wave-shaped INlantel (3) in on provided with openings in a known manner and the jacket in a known manner Way, the outside is finitely surrounded by a sound-absorbing material. 2. Schallabschirmer nach Anspruch i, dadurch gekennzeichnet, daß der schallschluckende Stoff in Form einer Schnur (4) in die Rillen des Wellrolires eingelagert ist. 2. Sound shield according to claim i, characterized in that the sound-absorbing substance in the form a cord (4) is embedded in the grooves of the Wellrolire. 3. Schallabschirmer nach Anspruch i und 2, dadurch gekennzeichnet, daß das Wehrohr mit einem Mantel aus schallschluckendem Stoff (5) umgeben ist. Schallabschiriner nach Anspruch t bis 3, dadurch gekennzeichnet, daß der Raum zwischen Wellrohr und Eingangsrohr in an sich bekannter Weise mit schallabsorbierendem Stoa ausgefüllt ist.3. Sound shield according to claim 1 and 2, characterized in that the weir pipe with a jacket is surrounded by sound-absorbing material (5). Sound separator according to claim t to 3, characterized in that the space between the corrugated pipe and the inlet pipe in is filled in a manner known per se with sound-absorbing stoa.
DEE54972D 1941-06-13 1941-06-13 Sound absorber on the inlet pipe between the engine and the muffler, especially for dampening idle noise Expired DE721824C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEE54972D DE721824C (en) 1941-06-13 1941-06-13 Sound absorber on the inlet pipe between the engine and the muffler, especially for dampening idle noise

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEE54972D DE721824C (en) 1941-06-13 1941-06-13 Sound absorber on the inlet pipe between the engine and the muffler, especially for dampening idle noise

Publications (1)

Publication Number Publication Date
DE721824C true DE721824C (en) 1942-06-19

Family

ID=7082005

Family Applications (1)

Application Number Title Priority Date Filing Date
DEE54972D Expired DE721824C (en) 1941-06-13 1941-06-13 Sound absorber on the inlet pipe between the engine and the muffler, especially for dampening idle noise

Country Status (1)

Country Link
DE (1) DE721824C (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1077085B (en) * 1957-10-29 1960-03-03 Friedrich Boysen Arrangement for sound absorption of the exhaust system of internal combustion engines in motor vehicles and the like. like
DE1293792B (en) * 1959-11-23 1969-04-30 Universal Oil Prod Co Device for afterburning the exhaust gas from internal combustion engines
EP0551713A1 (en) * 1992-01-13 1993-07-21 Copeland Corporation Refrigerant compressor discharge muffler
CN113153493A (en) * 2021-04-26 2021-07-23 吉林大学 Exhaust silencer for internal combustion engine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1077085B (en) * 1957-10-29 1960-03-03 Friedrich Boysen Arrangement for sound absorption of the exhaust system of internal combustion engines in motor vehicles and the like. like
DE1293792B (en) * 1959-11-23 1969-04-30 Universal Oil Prod Co Device for afterburning the exhaust gas from internal combustion engines
EP0551713A1 (en) * 1992-01-13 1993-07-21 Copeland Corporation Refrigerant compressor discharge muffler
CN113153493A (en) * 2021-04-26 2021-07-23 吉林大学 Exhaust silencer for internal combustion engine

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