Diferencia entre revisiones de «Silenciador (motores)»
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| ⚫ | Los silenciadores vienen instalados dentro del sistema de escape de la mayoría de los motores de combustión interna, although the muffler is not designed to serve any primary exhaust function. The muffler is engineered as an [[acoustics|acoustic]] [[soundproofing]] device designed to reduce the [[loudness]] of the [[sound pressure]] created by the engine by way of [[acoustic quieting]]. The majority of the sound pressure produced by the engine is emanated out of the vehicle using the same piping used by the silent exhaust gases absorbed by a series of passages and chambers lined with roving [[fiberglass]] insulation and/or resonating chambers [[harmonic]]ally tuned to cause [[destructive interference]] wherein opposite sound waves cancel each other out. An unavoidable [[side effect]] of muffler use is an increase of [[back pressure]] which decreases [[engine efficiency]]. This is because the engine exhaust must share the same complex exit pathway built inside the muffler as the sound pressure that the muffler is designed to mitigate. |
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Some vehicle owners remove or install an [[Aftermarket (automotive)|aftermarket]] muffler when [[engine tuning]] in order to increase [[Power (physics)|power]] output or reduce [[Fuel economy in automobiles|fuel consumption]] because of [[economic]] or [[Environmental quality|environmental]] concerns, recreational pursuits such as [[motorsport]] and [[hypermiling]] and/or for personal [[Aesthetics|aesthetic]] [[Acoustics|acoustical]] preferences. Although the [[Law|legality]] of altering a motor vehicle's [[Original equipment manufacturer|OEM]] exhaust system varies by jurisdiction, in most [[Developed country|developed parts of the world]], modification of a vehicle's exhaust system is usually highly regulated if not strictly prohibited. |
Some vehicle owners remove or install an [[Aftermarket (automotive)|aftermarket]] muffler when [[engine tuning]] in order to increase [[Power (physics)|power]] output or reduce [[Fuel economy in automobiles|fuel consumption]] because of [[economic]] or [[Environmental quality|environmental]] concerns, recreational pursuits such as [[motorsport]] and [[hypermiling]] and/or for personal [[Aesthetics|aesthetic]] [[Acoustics|acoustical]] preferences. Although the [[Law|legality]] of altering a motor vehicle's [[Original equipment manufacturer|OEM]] exhaust system varies by jurisdiction, in most [[Developed country|developed parts of the world]], modification of a vehicle's exhaust system is usually highly regulated if not strictly prohibited. |
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Revisión del 17:33 3 jun 2015
Un mofle o silenciador es un dispositivo que se usa para reducir el ruido que emite un motor de combustión interna y forma parte del sistema de escape del mismo.
Historia
La primera patente otorgada en EEUU para un sistema reductor de ruido par motores (‘Exhaust muffler for engines’) se le otorgó a los inventores Milton O. Reeves y Marshall T. Reeves de Columbus, Indiana el 11 de Mayo de 1897, con el número de patente 582485. Está descrita como que inventaron una mejora a un sistema de reducción de ruido de motores: “have invented certain new and useful Improvements in Exhaust-Mufflers for engines”.[1]
Descripción
Los silenciadores vienen instalados dentro del sistema de escape de la mayoría de los motores de combustión interna, although the muffler is not designed to serve any primary exhaust function. The muffler is engineered as an acoustic soundproofing device designed to reduce the loudness of the sound pressure created by the engine by way of acoustic quieting. The majority of the sound pressure produced by the engine is emanated out of the vehicle using the same piping used by the silent exhaust gases absorbed by a series of passages and chambers lined with roving fiberglass insulation and/or resonating chambers harmonically tuned to cause destructive interference wherein opposite sound waves cancel each other out. An unavoidable side effect of muffler use is an increase of back pressure which decreases engine efficiency. This is because the engine exhaust must share the same complex exit pathway built inside the muffler as the sound pressure that the muffler is designed to mitigate.
Some vehicle owners remove or install an aftermarket muffler when engine tuning in order to increase power output or reduce fuel consumption because of economic or environmental concerns, recreational pursuits such as motorsport and hypermiling and/or for personal aesthetic acoustical preferences. Although the legality of altering a motor vehicle's OEM exhaust system varies by jurisdiction, in most developed parts of the world, modification of a vehicle's exhaust system is usually highly regulated if not strictly prohibited.
Trade-off between power increase and noise reduction
When the flow of exhaust gases from the engine to the atmosphere is obstructed to any degree, back pressure arises and the engine's efficiency, and therefore power, is reduced. Performance-oriented mufflers and exhaust systems thus strive to minimize back pressure by employing numerous technologies and methods to attenuate the sound. For the majority of such systems, however, the general rule of “more power, more noise”[2] applies. Several such exhaust systems that utilize various designs and construction methods:
- Vector muffler - for larger diesel trucks, uses many concentric cones[cita requerida]
- Spiral baffle muffler - for regular cars, uses a spiral-shaped baffle system[3]
- Aero turbine muffler - creates partial vacuums at carefully spaced out time intervals to create negative back pressure, effectively ‘sucking’ the exhaust out of the combustion cylinders[4]
Referencias
- ↑ «Exhaust Muffler For Engines Muffler Patent». Consultado el 22 de junio de 2014.
- ↑ «Exhaust Theory». NSX Prime. Consultado el 22 June 2014.
- ↑ «Spiral Turbo Specialties:». spiralturbobaffles.com. Spiral Turbo Specialties. Consultado el 22 June 2014.
- ↑ «Aero Turbine Series Performance Exhaust Mufflers». pickupspecialties.com. Pickup Specialties. Consultado el 22 June 2014.
Ligas externas
Datos: Q1165721
Multimedia: Exhaust silencers / Q1165721