EP1908930A2 - Abgasschalldämpfer für Kraftfahrzeuge - Google Patents

Abgasschalldämpfer für Kraftfahrzeuge Download PDF

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Publication number
EP1908930A2
EP1908930A2 EP07380097A EP07380097A EP1908930A2 EP 1908930 A2 EP1908930 A2 EP 1908930A2 EP 07380097 A EP07380097 A EP 07380097A EP 07380097 A EP07380097 A EP 07380097A EP 1908930 A2 EP1908930 A2 EP 1908930A2
Authority
EP
European Patent Office
Prior art keywords
chamber
resonating
outlet pipes
casing
gas
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Withdrawn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
EP07380097A
Other languages
English (en)
French (fr)
Other versions
EP1908930A3 (de
Inventor
Eduardo c/o Seat S.A. Sanchez Lamas
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.)
SEAT SA
Original Assignee
SEAT SA
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 SEAT SA filed Critical SEAT SA
Publication of EP1908930A2 publication Critical patent/EP1908930A2/de
Publication of EP1908930A3 publication Critical patent/EP1908930A3/de
Withdrawn legal-status Critical Current

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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
    • F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
    • F01N1/04—Silencing apparatus characterised by method of silencing by using resonance having sound-absorbing materials in resonance chambers
    • 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
    • F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
    • F01N1/023—Helmholtz resonators
    • 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
    • F01N1/082—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling the gases passing through porous members
    • 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
    • F01N2310/00—Selection of sound absorbing or insulating material
    • F01N2310/04—Metallic wool, e.g. steel wool, copper wool or the like
    • 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
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/02—Tubes being perforated
    • 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
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/14—Plurality of outlet tubes, e.g. in parallel or with different length

Definitions

  • the present invention relates to an exhaust silencer for automobile vehicles, particularly for sports automobiles.
  • the object of the invention is to obtain a silencer with optimal acoustic performance in relation to its size or volume, as well as a reduction in the counter pressure to the flow of gases, i.e. while at the same time reducing the noise, it also minimizes the power it takes away from the engine of the vehicle.
  • the invention can therefore be applied in the field of the manufacture of automobiles and their accessories.
  • the most common silencers have an intake pipe leading to the chamber defined by the mentioned casing, through which pipe the gases generated by the engine of the vehicle enter the silencer, possibly one or more intermediate pipes, and finally a substantially cylindrical outlet pipe traversing the cover opposite to the cover traversed by the intake pipe, projecting therefrom.
  • Internal separators divide said chamber and form the support for the intermediate pipes.
  • the flow of gases in this type of silencers is guided, i.e. the gases pass through multi-resonators.
  • This structure involves a drawback which is essentially focused on the fact that silencers are large if they are to be acoustically effective, which in turn means that they are heavy in relation to the power of engines. More specifically, this problem is because traditional silencers require a large volume of air to be able to dissipate the frequencies generated by the exhaust gases from the engine. Therefore, in order to obtain a certain acoustic performance a very large and therefore very heavy silencer is required.
  • the exhaust silencer proposed by the invention resolves in a fully satisfactory manner the drawbacks described above, allowing to reduce its volume and therefore its weight, without detriment to its features from the acoustic silencer point of view, such that the performance in such aspect is optimized while at the same time the counter pressure generated by the flow of gases is reduced.
  • the described silencer is structured from a casing similar to conventional casings, i.e. structured by means of a tubular frame closed by means of two end covers, but with the particularity that the gas intake occurs laterally through the middle area of the frame, said intake opening out into an expansion chamber the back wall of which is carried out in a multi-resonating membrane on which the gases collide, which membrane rests through a steel wool layer on an absorbent material filler taking up this area of the casing. It can be defined as a multiple resonator opposite to the flow of gases.
  • the mentioned expansion chamber extends, bent and orthogonally, into a pair of outlet pipes which lead towards the closest end cover of the casing, also surrounded by an absorbent material, and a high frequency multi-resonator is arranged in each one.
  • This assembly forms a Helmholtz resonator and ends up filtering the dominant frequencies of the exhaust noise causing the greatest auditory discomfort.
  • the intake pipe (3) accesses the casing of the silencer through the middle area of the tubular frame (1), as can also be seen in Figure 1, whereas the outlets (5) for said gases are located inside the casing next to one of its covers (2), which outlets are connected to the actual exhaust pipes (4).
  • outlets (5) internally incorporate high frequency multi-resonators (6).
  • the frequencies of the gases are filtered with a guided flow in these pipes (5) by means of the mentioned multi-resonators (6).
  • said pipe opens out into an expansion chamber (7), which is directly communicated with the outlet pipes (5) and delimited by a multi-resonating membrane (8) on which the gases collide, causing the filtering of high and middle frequencies.
  • This frequency filtering is combined with the presence of a absorbent material (9) for absorbing sound pressure surrounding both the expansion chamber (7) and the outlet pipes (5), a layer of steel wool (10) being located between this absorbent material (9) and the multi-resonating membrane (8), which wool prevents the depression of the gases, generated by the engine on some occasions, from suctioning the absorbent material (9).
  • a Helmholtz resonator neck (11) projects from the expansion chamber (7), opposite to the outlet pipes (5), which opens out into an anti-resonating chamber (12) taking up a good part of the casing (1), specifically in its area opposite to the outlet pipes (5).
  • the assembly formed by the resonator neck (11) and the anti-resonating chamber (12) prevents the gas from resonating at frequencies causing noise that bothers the ears.
  • the energy provided by said frequency is dissipated in the form of heat, compressing the gases in the chamber (12) by means of a gas column generated by the resonator neck (11).
  • Tuning in on the most outstanding frequencies is obtained by means of the specific sizing of the neck-chamber (11-12) assembly, this sizing changing according to a very small margin of frequencies because it is calculated for a certain frequency at certain revolutions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
EP07380097A 2006-10-03 2007-04-11 Abgasschalldämpfer für Kraftfahrzeuge Withdrawn EP1908930A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES200602160U ES1063818Y (es) 2006-10-03 2006-10-03 Silencioso de escape para vehiculos automoviles

Publications (2)

Publication Number Publication Date
EP1908930A2 true EP1908930A2 (de) 2008-04-09
EP1908930A3 EP1908930A3 (de) 2009-09-02

Family

ID=37810274

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07380097A Withdrawn EP1908930A3 (de) 2006-10-03 2007-04-11 Abgasschalldämpfer für Kraftfahrzeuge

Country Status (2)

Country Link
EP (1) EP1908930A3 (de)
ES (1) ES1063818Y (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016103459A1 (de) 2016-02-26 2017-08-31 Tenneco Gmbh Abgasschalldämpfer
WO2017144266A1 (de) 2016-02-26 2017-08-31 Tenneco Gmbh Abgasschalldämpferelement und abgasschalldämpfer
DE102016103466A1 (de) 2016-02-26 2017-08-31 Tenneco Gmbh Abgasschalldämpferelement
DE102016103453A1 (de) 2016-02-26 2017-08-31 Tenneco Gmbh Abgasanlage
CN110307059A (zh) * 2018-03-20 2019-10-08 佛吉亚排放控制技术美国有限公司 提供用于车辆框架构件的无泄漏的声学容积部的方法
US20210355850A1 (en) * 2020-05-13 2021-11-18 Hyundai Motor Company Exhaust system noise reduction device of vehicle

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109184969B (zh) * 2018-10-31 2024-06-04 马勒汽车技术（中国）有限公司 车辆的空滤装置及车辆的进气***

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6892853B2 (en) * 2003-05-01 2005-05-17 Agency For Science Technology And Research High performance muffler
SE528092C2 (sv) * 2004-06-17 2006-09-05 Ggp Sweden Ab Anordning vid förbränningsmotor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016103459A1 (de) 2016-02-26 2017-08-31 Tenneco Gmbh Abgasschalldämpfer
WO2017144266A1 (de) 2016-02-26 2017-08-31 Tenneco Gmbh Abgasschalldämpferelement und abgasschalldämpfer
DE102016103466A1 (de) 2016-02-26 2017-08-31 Tenneco Gmbh Abgasschalldämpferelement
DE102016103453A1 (de) 2016-02-26 2017-08-31 Tenneco Gmbh Abgasanlage
DE102016103453B4 (de) 2016-02-26 2023-06-15 Tenneco Gmbh Abgasschalldämpfer, Katalysator und Abgasanlage
DE102016103459B4 (de) 2016-02-26 2023-09-21 Tenneco Gmbh Abgasschalldämpfer
CN110307059A (zh) * 2018-03-20 2019-10-08 佛吉亚排放控制技术美国有限公司 提供用于车辆框架构件的无泄漏的声学容积部的方法
US20210355850A1 (en) * 2020-05-13 2021-11-18 Hyundai Motor Company Exhaust system noise reduction device of vehicle
US11846216B2 (en) * 2020-05-13 2023-12-19 Hyundai Motor Company Exhaust system noise reduction device of vehicle

Also Published As

Publication number Publication date
ES1063818U (es) 2006-12-01
EP1908930A3 (de) 2009-09-02
ES1063818Y (es) 2007-03-01

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