EP1500798A1 - Silencieux et ligne d'échappement - Google Patents

Silencieux et ligne d'échappement Download PDF

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Publication number
EP1500798A1
EP1500798A1 EP04015174A EP04015174A EP1500798A1 EP 1500798 A1 EP1500798 A1 EP 1500798A1 EP 04015174 A EP04015174 A EP 04015174A EP 04015174 A EP04015174 A EP 04015174A EP 1500798 A1 EP1500798 A1 EP 1500798A1
Authority
EP
European Patent Office
Prior art keywords
exhaust pipe
resonator
silencer
housing
sound absorber
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.)
Granted
Application number
EP04015174A
Other languages
German (de)
English (en)
Other versions
EP1500798B1 (fr
Inventor
Rolf Dr. Jebasinki
Sascha Leng
Marco Jess
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 Exhaust Technology 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
Publication of EP1500798A1 publication Critical patent/EP1500798A1/fr
Application granted granted Critical
Publication of EP1500798B1 publication Critical patent/EP1500798B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1838—Construction facilitating manufacture, assembly, or disassembly characterised by the type of connection between parts of exhaust or silencing apparatus, e.g. between housing and tubes, between tubes and baffles
    • 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
    • F01N1/006—Silencing apparatus characterised by method of silencing by using dead chambers communicating with gas flow passages comprising at least one perforated tube extending from inlet to outlet of the silencer
    • 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
    • F01N1/24—Silencing apparatus characterised by method of silencing by using sound-absorbing materials
    • 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
    • F01N2310/02—Mineral wool, e.g. glass wool, rock wool, asbestos 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
    • 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
    • F01N2470/04—Tubes being perforated characterised by shape, disposition or dimensions of apertures
    • 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
    • F01N2470/10—Tubes having non-circular cross section

Definitions

  • the invention relates to a silencer according to the preamble of the claim 1 for an exhaust system of a motor vehicle. Furthermore, the concerns Invention an exhaust system for a motor vehicle, with an inventive Silencer.
  • the exhaust gas flow to conduct through a so-called sound absorber or absorption silencer.
  • the sound waves in a damping material by friction converted into heat and so muted.
  • a silencer for an exhaust system of a Motor vehicle known in the sound waves of different frequency ranges attenuated by the combination of a resonator with a sound absorber be arranged in a common muffler housing.
  • Resonator here serves a branched off from the exhaust pipe resonator tube, with is in flow communication with the exhaust pipe.
  • the sound absorber that the is to attenuate high-frequency sound waves, is spaced from the resonator tube arranged in the muffler housing and is also with the exhaust pipe in Flow connection.
  • a disadvantage of this known muffler is in particular that of Silencer due to the combination of the resonator tube with the sound absorber a large volume compared to conventional silencers has.
  • the invention solves the problem by a muffler with the features according to claim 1. Furthermore, the invention solves the problem by an exhaust system according to claim 12, with a silencer according to the invention Is provided.
  • the silencer according to the invention which is provided with a resonator for Attenuation of low-frequency sound waves and a sound absorber for absorption high-frequency sound waves are both simultaneously the exhaust pipe itself and the sound absorber as functional elements of Resonator used form as part of the resonator.
  • a tubular resonance body is produced used, which is in flow communication with the exhaust pipe, the exhaust pipe circumferentially encloses simultaneously, but spaced from the exhaust pipe while at the same time the sound absorber is at least partially in the open end of the sound box is inserted.
  • the gas volume in the resonator, with which the low - frequency components of the Sound waves are to be damped, is thus through the inner surface of the Resonant body, the outer surface of the resonant body enclosed Section of the exhaust pipe and the outer surface of the resonant body introduced sound absorber limited.
  • the Exhaust pipe and the sound absorber in the design of the resonator leaves a very compact silencer with a compared to the state of the Implement technology of extremely low volume.
  • the exhaust pipe and the sound absorber specifically influence the damping behavior of the resonator.
  • Muffler proposed to use the tubular resonator body its opposite end to the open end on the inside to attach the silencer housing.
  • the sound box with its end opposite the open end on the outer surface be attached to the exhaust pipe.
  • the distance of the inner surface of the resonator to the outer surface of the exhaust pipe in the circumferential direction of Exhaust pipe considered at least approximately constant to unwanted To avoid turbulences in the sound box, which may arise could cause audible flow noise.
  • the distance of the inner surface of the resonator to the outer surface of the exhaust pipe preferably also in the longitudinal direction of the Seen resonant body considered at least partially constant.
  • the silencer has the exhaust pipe and the resonance body preferably at least approximately circular cross section, wherein the tubular resonance body concentric is arranged to the exhaust pipe.
  • the exhaust pipe For example, to make oval in cross-section. In such a development should the cross section of the resonator to the cross section of Adapted exhaust pipe and be arranged symmetrically to the exhaust pipe.
  • the sound absorber is in a particularly preferred embodiment of the inventive muffler designed so that even the sound absorber completely encloses the exhaust pipe in the circumferential direction, wherein the Sound absorber is attached to the exhaust pipe at the same time.
  • This can be on the one hand the connection of the sound absorber to the exhaust pipe on very simple Realize manner, while the sound absorber at the same time at extremely low Space requirement for the sound absorption sufficiently large volume can.
  • a sound absorber As a sound absorber is used in this preferred embodiment described above preferably a sound absorber, which is a pushed onto the exhaust pipe Absorber housing having, with the exhaust pipe in flow communication standing interior opposite the muffler housing at least approximately gas-tight, and with a damping material, such as Mineral wool, steel wool and the like, is filled for sound absorption.
  • a damping material such as Mineral wool, steel wool and the like.
  • the resonator over the entire length of the resonator consistent Has flow and damping property is the resonant body in a particularly preferred embodiment of the invention Silencer at its open end so widened that in one plane viewed transversely to the longitudinal direction of the resonator body in the plane of the inner surface of the sound box and the outer surface of the sound absorber limited flow cross section at least approximately the flow cross section corresponds to that of the inner surface of the sound box and the outer surface of the exhaust pipe in a parallel second plane considered limited.
  • a plurality of openings are formed, by the exhaust gases between the exhaust pipe and the resonator body or the sound absorber can flow back and forth, with the provision a plurality of openings instead of a single opening the exhaust pipe in his Stiffness is hardly affected.
  • the openings are particularly preferred as Slots formed which extend in the longitudinal direction of the exhaust pipe.
  • the sum of the surface areas of the flow-through surfaces of the resonator in fluid communication openings on the exhaust pipe should about 0.8 to 1 times that in a plane transverse to the longitudinal direction of Resonant body considered flow cross section, the of the Inner surface of the resonance body and the outer surface of the exhaust pipe is limited to ensure that the entire gas volume in the sound box is vibrated and a sufficiently high damping effect is guaranteed.
  • the sum of the Flow cross-sections of the openings in total less than 0.8 times the Flow cross section of the resonator is, for example, if manufacturing technology Reasons or for reasons of insufficient rigidity the exhaust pipe, the size and number of openings is limited.
  • each survey should preferably be half the distance between the Inner surface of the sound box and the outer surface of the sound absorber correspond to remaining gap, in which the elevation protrudes.
  • the invention relates to an exhaust system for a Motor vehicle equipped with a silencer according to the invention.
  • Fig. 1 is a schematic sectional view of an inventive silencer 10 shown for an exhaust system in a motor vehicle.
  • the silencer 10 is conventionally either via flanges to the casing the exhaust system connected or already in the exhaust system immediately integrated.
  • the muffler 10 has a muffler housing 12, the in the illustrated embodiment a Hollow cylinder shape has.
  • the muffler housing 12 is at its two each end closed by a cover 14 and 16, respectively.
  • a hollow cylindrical exhaust pipe extends 18, which formed by the two covers 14 and 16 openings 20 and 22 in the longitudinal direction of the muffler housing 12 passed is.
  • the exhaust pipe 18 is connected to the two covers 14 and 16 of the Silencer housing 12 gas-tight welded.
  • a resonator 24 of a resonator 26 is arranged in the muffler housing 12 in the muffler housing 12 is concentric about the exhaust pipe 18 .
  • the also trained as a pipe Sound box 24 is with its one open end on the inside attached to the cover 14 shown on the left in Fig. 1, extends in the longitudinal direction the silencer housing 12 and ends at a short distance before the inside of the second cover 16 so that the other end of the tubular Sound box 24 remains open.
  • the resonator 24 has a cylindrical portion 28, which merges into a flared cylindrical portion 30 which is about 3/4 the length of the resonator 24 forms.
  • the sound absorber 32 In the flared portion 30 of the sound box 24 is a sound absorber 32 arranged.
  • the sound absorber 32 has an absorber housing 34, which as a the exhaust pipe 18 enclosing pipe piece is formed, which at closed at its ends and connected to the exhaust pipe 18 gas-tight.
  • a damping material 36 In the interior of the absorber housing 34 is a damping material 36, such as rock wool, Steel wool and the like, taken with the in the absorber housing 34 conducted medium and high frequency sound waves by friction in heat be converted and steamed in this way.
  • the radial elevations 38 are each dimensioned in their length, that they are about half the gap height between the inner surface of the resonator 24 and the outer surface of the sound absorber 32 correspond. They are intended to prevent the vibrating body vibrating during damping 24 collided with the inside of the muffler housing 12.
  • pulsating Exhaust gas flow are at the exhaust pipe 18 more in the longitudinal direction of the Exhaust pipe 18 extending slots 40 and 42, respectively.
  • the slots 40 stand with the from the inner surface of the sound box 24, the outer surface the exhaust pipe 18 and the outer surface of the sound absorber 32 limited gas volume in fluid communication.
  • Connect the slots 42 the exhaust pipe 18 with the interior of the sealed-off to the outside absorber housing 30. Through the slots 40 and 42 can through the exhaust pipe 18 flowing exhaust gas flow with the gas column in the resonator 26 and with the volume of gas contained in the sound absorber 32 for vibration transmission communicate.
  • FIG. 2 and 3 are sections along the section lines shown in FIG. 1 II-II and III-III shown.
  • 2 shows the section II-II through the exhaust pipe 18 and the unexpanded portion 28 of the sound box 24, while Fig. 3 shows the section III-III through the sound box 24, the sound absorber 32 and the exhaust pipe 18 shows.
  • the volume of the resonator 26 in the region of the unexpanded portion 28 of the resonator 24 is limited by the inner surface of the resonator 24 and the outer surface of the exhaust pipe 18 and defined in this sectional plane has a flow cross-section A 1 , over the entire length of the unexpanded portion 28 is approximately constant.
  • the volume of the resonator 26 in the region of the widened portion 30 of the resonator 24 is limited by the inner surface of the resonator 24 and the outer surface of the sound absorber 32 and defines a flow cross-section A 2 in this sectional plane. Again, the flow cross-section A 2 remains approximately constant over the length of the widened portion 30.
  • the radial distance of the outer surface of the exhaust pipe 18 to the inner surface resonating body 24 in the unexpanded portion 28 of the resonator 24 and the radial distance of the outer surface of the sound absorber 32 to the inner surface of the resonator 24 each chosen so that the two flow cross-sections A 1 and A 2 correspond to each other at least approximately.
  • the number of slots 40 which connect the exhaust pipe 18 and the resonator 26 with each other, and their flow cross sections are again chosen so that they at least 0.8 to 1 times, preferably 0.9 times, the flow cross section A 1 and A 2 , which ensures that a sufficient volume flow of the exhaust gas can communicate with the resting in the resonator 24 gas column for vibration damping.
  • an exhaust stream flows through the exhaust pipe 18, in which in particular due to the clocked operation of the internal combustion engine propagate resulting pressure pulses or sound waves.
  • the exhaust gas flow flows into the muffler 10 according to the invention, communicates the Exhaust gas flow with the resting in the resonator 26 gas column, wherein the exhaust gas flow acting sound waves, the gas column in the resonator 26 to vibrate stimulate.
  • the vibrating gas column excites the resonator 24 to swing, which due to its mass and its material properties Low-frequency components of the resulting vibrations dampens, so that in low-frequency sound waves in the exhaust gas stream damped become.
  • they are present in the exhaust gas stream Sound waves via the slots 42 in the sound absorber 32 a. This is especially the energy of medium and high frequency sound waves due to friction in the Damping material is converted into heat. Then it flows like that Silenced exhaust gas flow from the muffler 10.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
EP04015174.8A 2003-07-24 2004-06-29 Silencieux et ligne d'échappement Active EP1500798B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10333645 2003-07-24
DE2003133645 DE10333645A1 (de) 2003-07-24 2003-07-24 Schalldämpfer sowie Abgasanlage

Publications (2)

Publication Number Publication Date
EP1500798A1 true EP1500798A1 (fr) 2005-01-26
EP1500798B1 EP1500798B1 (fr) 2016-09-28

Family

ID=33483040

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04015174.8A Active EP1500798B1 (fr) 2003-07-24 2004-06-29 Silencieux et ligne d'échappement

Country Status (2)

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EP (1) EP1500798B1 (fr)
DE (1) DE10333645A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2534343B1 (fr) * 2010-02-11 2017-03-15 Faurecia Emissions Control Technologies, USA, LLC Silencieux en plastique à chambre helmholtz
CN107327650A (zh) * 2017-08-01 2017-11-07 北京市劳动保护科学研究所 一种管道消声器及具有该消声器的管道系统
EP2857748B1 (fr) * 2013-10-03 2019-11-13 Poujoulat Dispositif atténuateur de bruit pour un conduit d'évacuation de fumée équipant une chaudière

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011114351A1 (de) * 2011-09-27 2014-06-12 Mann + Hummel Gmbh Abgasschalldämpfer

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB403651A (en) * 1931-06-20 1933-12-20 Burgess Lab Inc C F Silencer for gaseous currents
US2115103A (en) * 1936-12-21 1938-04-26 Buffalo Pressed Steel Company Muffler
US3020095A (en) * 1957-12-16 1962-02-06 Diehl Kg Track chain for vehicles
GB1522999A (en) * 1975-12-20 1978-08-31 Saab Scania Ab Silencers for damping sound waves in gases
DE3509033A1 (de) * 1985-03-13 1986-09-18 Müller - BBM GmbH, 8033 Planegg Schalldaempfer
DE8806069U1 (fr) * 1988-05-06 1988-06-30 Roth-Technik Gmbh, 7560 Gaggenau, De
US5783780A (en) * 1995-11-27 1998-07-21 Nissan Motor Co., Ltd Sound absorption structure
EP0802308B1 (fr) 1996-04-18 2001-03-21 HEINRICH GILLET GMBH & CO. KG Silencieux

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB403651A (en) * 1931-06-20 1933-12-20 Burgess Lab Inc C F Silencer for gaseous currents
US2115103A (en) * 1936-12-21 1938-04-26 Buffalo Pressed Steel Company Muffler
US3020095A (en) * 1957-12-16 1962-02-06 Diehl Kg Track chain for vehicles
GB1522999A (en) * 1975-12-20 1978-08-31 Saab Scania Ab Silencers for damping sound waves in gases
DE3509033A1 (de) * 1985-03-13 1986-09-18 Müller - BBM GmbH, 8033 Planegg Schalldaempfer
DE8806069U1 (fr) * 1988-05-06 1988-06-30 Roth-Technik Gmbh, 7560 Gaggenau, De
US5783780A (en) * 1995-11-27 1998-07-21 Nissan Motor Co., Ltd Sound absorption structure
EP0802308B1 (fr) 1996-04-18 2001-03-21 HEINRICH GILLET GMBH & CO. KG Silencieux

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2534343B1 (fr) * 2010-02-11 2017-03-15 Faurecia Emissions Control Technologies, USA, LLC Silencieux en plastique à chambre helmholtz
EP2857748B1 (fr) * 2013-10-03 2019-11-13 Poujoulat Dispositif atténuateur de bruit pour un conduit d'évacuation de fumée équipant une chaudière
CN107327650A (zh) * 2017-08-01 2017-11-07 北京市劳动保护科学研究所 一种管道消声器及具有该消声器的管道系统

Also Published As

Publication number Publication date
DE10333645A1 (de) 2005-02-24
EP1500798B1 (fr) 2016-09-28

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