DE685996C - Silencers, especially for internal combustion engines - Google Patents
Silencers, especially for internal combustion enginesInfo
- 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
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
- F01N1/08—Silencing 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)
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)
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 |
-
1938
- 1938-03-08 DE DEZ24443D patent/DE685996C/en not_active Expired
Cited By (3)
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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