DE685996C - Silencers, especially for internal combustion engines - Google Patents

Silencers, especially for internal combustion engines

Info

Publication number
DE685996C
DE685996C DEZ24443D DEZ0024443D DE685996C DE 685996 C DE685996 C DE 685996C DE Z24443 D DEZ24443 D DE Z24443D DE Z0024443 D DEZ0024443 D DE Z0024443D DE 685996 C DE685996 C DE 685996C
Authority
DE
Germany
Prior art keywords
internal combustion
combustion engines
silencers
reflectors
sound waves
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
DEZ24443D
Other languages
German (de)
Inventor
Dipl-Ing Wolfgang Zoeller
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.)
WOLFGANG ZOELLER DIPL ING
Original Assignee
WOLFGANG ZOELLER DIPL ING
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 WOLFGANG ZOELLER DIPL ING filed Critical WOLFGANG ZOELLER DIPL ING
Priority to DEZ24443D priority Critical patent/DE685996C/en
Application granted granted Critical
Publication of DE685996C publication Critical patent/DE685996C/en
Expired legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00Silencing apparatus characterised by method of silencing
    • F01N1/08Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)

Description

Schalldämpfer, insbesondere für Brennkraftmaschinen Die Lösung der Aufgabe, das Auspuffgeräusch von Motoren, insbesondere Flugzeugmotoren, wirksam zu dämpfen, ist bisher nicht immer befriedigend gelungen. Dieser Umstand wirkt .sich gerade bei Flugzeugmotoren dadurch schädlich aus:, daß die noch nicht gedämpften, in den unbegrenzten Luftraum austretenden Geräusche in diesem eine erhebliche Resonanz erzeugen und sich daher in verstärktem Maße fortpflanzen.Silencer, especially for internal combustion engines The solution of Task, the exhaust noise of engines, especially aircraft engines, effective attenuating has not always been satisfactory so far. This fact has an effect especially with aircraft engines because of the fact that the not yet damped, Noises emanating into the unlimited air space have a considerable resonance in this area produce and therefore reproduce to a greater extent.

Demgegenüber verhindert der Erfindungsgedanke diese Resonanz, indem er die Auspuffleitung durch Schallreflektoren abschließt,, die den Austritt der Schallwellen in den Luftraum nach den physikalischen Gesetzen ausschließt, dieselben vielmehr in das Auspufforgan zurückstrahlt und gleichzeitig den Verbrennungsgasen reibungslosen Abzug gestattet. Die Reflektion von Sehallivellen ist an sich bekannt. Es sind auch Vorschläge gemacht worden, sie zur Schalldämpfung oder Ablenkung ,anzuwenden. Allen bisher bekanntgewordenen Vorschlägen haftet jedoch der Fehler an, die reflektierenden Flächen im Vergleich zu der großen Wellenlänge der Auspuffgase zu klein zu gestalten.In contrast, the concept of the invention prevents this resonance by he closes the exhaust line by sound reflectors, which the exit of the Sound waves in the air space according to the physical laws excludes the same rather it radiates back into the exhaust system and at the same time the combustion gases smooth withdrawal permitted. The reflection of visual levels is known per se. Proposals have also been made to use them for sound attenuation or deflection. However, all proposals that have become known so far have an inherent error, the reflective ones To make surfaces too small compared to the long wavelength of the exhaust gases.

Im Gegensatz zu den vorerwähnten bekannten Anwendungen der Schällreflektion werden daher nach der Erfindung die Schallwellen über Reflektoren gleitet, deren wirksame Gesamtfläche zu der Wellenlänge der Abgase in einem geeigneten. Verhältnis steht. Hierdurch wird nicht nur ihre Resonanz im Luftraum verhindert, sondern auch gleichzeitig durch die Verwirbelung der austretenden und-zurückgestrahlten Wellen deren Interferenz erreicht.In contrast to the known applications of echo reflection mentioned above are therefore according to the invention, the sound waves slides over reflectors, their effective total area to the wavelength of the exhaust gases in a suitable. relationship stands. This not only prevents their resonance in the airspace, but also at the same time by the swirling of the emerging and reflected waves their interference reached.

Zwei Ausführungsformen sind in den Abb. i und 2 dargestellt.Two embodiments are shown in Figs.

In Ahb. i sind die Reflektoren in einen in bekannter Weise mit Sammelbehälter ausgestatteten Auspufftopf eingebaut. Es bezeichnet in ihr e die Reflektoren, 1i die Austrittsöffnung der Gase in die Luft, in welche .sie durch die reflektierenden Teile ohne wesentliche Richtungsänderung geleitet werden.In Ahb. i are the reflectors in a known manner with a collecting container equipped muffler installed. In it e denotes the reflectors, 1i the outlet opening of the gases into the air, into which .sie through the reflective Parts are guided without any significant change in direction.

Abb> 2 _ stellt eine Ausführung dar, in welcher zur Rückstrahlung ebene Flächen benutzt werden. Die Bezeichnungen sind die gleichen wie in Abb. i.Fig> 2 _ shows an embodiment in which for reflection flat surfaces are used. The designations are the same as in Fig. I.

Claims (1)

PATENTANSPRUCFI Schalldämpfer, insbesondere für Brennkraftmaschinen, bei welchem die Schallwellen eine Reihe fester oder verstellbarer Reflektoren durchlaufen müssen, dadurch gekennzeichnet, daß die reflektierenden Flächen im Verhältnis zur Länge der Schallwellen sehr .groß sind.PATENT APPLICATION Mufflers, especially for internal combustion engines, in which the sound waves pass through a series of fixed or adjustable reflectors must, characterized in that the reflective surfaces in relation to Length of the sound waves are very large.
DEZ24443D 1938-03-08 1938-03-08 Silencers, especially for internal combustion engines Expired DE685996C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEZ24443D DE685996C (en) 1938-03-08 1938-03-08 Silencers, especially for internal combustion engines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEZ24443D DE685996C (en) 1938-03-08 1938-03-08 Silencers, especially for internal combustion engines

Publications (1)

Publication Number Publication Date
DE685996C true DE685996C (en) 1939-12-30

Family

ID=7626154

Family Applications (1)

Application Number Title Priority Date Filing Date
DEZ24443D Expired DE685996C (en) 1938-03-08 1938-03-08 Silencers, especially for internal combustion engines

Country Status (1)

Country Link
DE (1) DE685996C (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1174579B (en) * 1960-08-11 1964-07-23 Eberspaecher J Soundproofing system for slot-controlled combustion engines
DE1293792B (en) * 1959-11-23 1969-04-30 Universal Oil Prod Co Device for afterburning the exhaust gas from internal combustion engines
EP0020823A1 (en) * 1979-04-10 1981-01-07 Lionel Fothergill Engine exhaust silencer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1293792B (en) * 1959-11-23 1969-04-30 Universal Oil Prod Co Device for afterburning the exhaust gas from internal combustion engines
DE1174579B (en) * 1960-08-11 1964-07-23 Eberspaecher J Soundproofing system for slot-controlled combustion engines
EP0020823A1 (en) * 1979-04-10 1981-01-07 Lionel Fothergill Engine exhaust silencer

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