EP0705961B1 - Silencieux de gaz d'échappement - Google Patents

Silencieux de gaz d'échappement Download PDF

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Publication number
EP0705961B1
EP0705961B1 EP95111537A EP95111537A EP0705961B1 EP 0705961 B1 EP0705961 B1 EP 0705961B1 EP 95111537 A EP95111537 A EP 95111537A EP 95111537 A EP95111537 A EP 95111537A EP 0705961 B1 EP0705961 B1 EP 0705961B1
Authority
EP
European Patent Office
Prior art keywords
chamber
exhaust gas
exhaust
housing
feed pipe
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 - Lifetime
Application number
EP95111537A
Other languages
German (de)
English (en)
Other versions
EP0705961A1 (fr
Inventor
Hans-Peter Mai
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.)
Roth Technik Austria GmbH
Original Assignee
Roth Technik Austria GmbH
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 Roth Technik Austria GmbH filed Critical Roth Technik Austria GmbH
Publication of EP0705961A1 publication Critical patent/EP0705961A1/fr
Application granted granted Critical
Publication of EP0705961B1 publication Critical patent/EP0705961B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/10—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling in combination with 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
    • 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
    • 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
    • F01N1/089—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling using two or more expansion chambers in series
    • 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
    • F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
    • F01N2450/20—Methods or apparatus for fitting, inserting or repairing different elements by mechanical joints, e.g. by deforming housing, tube, baffle plate or parts thereof
    • 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
    • F01N2470/18—Structure or shape of gas passages, pipes or tubes the axis of inlet or outlet tubes being other than the longitudinal axis of apparatus
    • 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
    • F01N2470/24—Concentric tubes or tubes being concentric to housing, e.g. telescopically assembled
    • 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
    • F01N2490/00—Structure, disposition or shape of gas-chambers
    • F01N2490/08—Two or more expansion chambers in series separated by apertured walls only

Definitions

  • the invention relates to an exhaust silencer according to the Preamble of claim 1.
  • DE-22 57 852 A1 was an exhaust silencer for Multi-cylinder internal combustion engines known, the one Has resonator chamber which - in the flow direction of the Exhaust gas seen - a reflection chamber is arranged downstream.
  • exhaust gas passes through one of the end faces of the Housing projecting into the reflection chamber in this and from there through passage openings provided in its jacket into a third surrounding the reflection chamber and filled with sound absorbing material Chamber, then through a coaxial with the feed pipe Discharge pipe to step outside.
  • the protruding into the reflection chamber End of the feed tube is designed like an injector, is readily apparent that such a built-up exhaust silencer due to its only low performance not alone, but only in combination with others Exhaust silencers can bring a corresponding performance.
  • the US-PS 1. 432, 797 is another exhaust silencer known for internal combustion engines, which protrudes into the housing at the end Feed pipe with through openings arranged on one of its jacket halves for the exhaust gas. This flows through one after the other several exhaust gas chambers, the last one with the exhaust gas flowing through it connected to a discharge pipe directed transversely to the longitudinal axis of the feed pipe is.
  • the jacket is the first surrounding the feed pipe Chamber on one of its jacket halves with passage openings for the exhaust gas provided, which are diametrically opposite the through openings of the feed tube.
  • the first chamber is surrounded by a second chamber, the a jacket half is also provided with through openings, which the Passages of the first chamber are diametrically opposite.
  • the invention is therefore based on the object of providing a powerful exhaust gas silencer which, on the one hand, has a compact design and, on the other hand, is suitable for damping both low-frequency and, in contrast, higher-frequency sound components.
  • This object is achieved in a generic exhaust silencer by the characterizing features of claim 1.
  • the Reflection chamber in the first chamber surrounding the feed tube, the Reflection chamber can be formed, primarily low-frequency Sound components attenuated, with the possibility of dividing the Main flow in individual flows additionally an increase in the discharge pressure avoided and achieved by relaxing eddy currents.
  • the multi-chamber system according to the invention shows in comparison to known ones Combination mufflers which usually have a small cross section and have a large overall length, an optimal overall Exhaust gas back pressure behavior with a relatively high degree of damping, as well as one low structure-borne noise and heat radiation.
  • the performance of the multi-chamber system can still be reduced be increased, as known per se, if between the first and the second chamber another chamber with correspondingly arranged Through openings for the exhaust gas is provided.
  • the damping in the high-frequency range is increased, on the other hand, the exhaust silencer is thereby at his cover the entire surface with an insulation jacket both structure-borne noise and temperature insulation be further improved.
  • the exhaust silencer shown in Fig. 1 has a the (not shown) engine-side exhaust pipe connecting feed pipe 1 for the exhaust gas. This flows into Direction of the arrow in essentially over the entire Length of the exhaust silencer extending supply pipe 1, the at its end opposite the exhaust gas inlet a bottom 2 is closed gas-tight.
  • the feed pipe 1 is with Passage openings 3 provided for the exhaust gas, the almost along its entire length in just one of its Shell halves, preferably - in relation to Figure 2 - in his lower jacket half 4 are arranged.
  • the feed pipe 1 is even closer to one descriptive housing 5 of the exhaust silencer arranged, the essentially of an outer tube 6 and two end walls 7, 8 is formed, which with the tube 6th are firmly connected.
  • the end walls 7, 8 are also firmly connected to the feed pipe 1.
  • the feed pipe 1 is surrounded by a pipe 9, both of which Ends are also firmly connected to the walls 7, 8.
  • the tube 9 is arranged coaxially with the feed tube 1, the space delimited by the two tubes 1, 9 is a first chamber 11 forms for the exhaust gas.
  • the circular Cross section of the feed pipe 1 also has the pipe 9 a circular cross section. Of course you can the cross-sectional shape of this and also the other tubes any, for example also oval.
  • the tube 9 is of a substantially rectangular shape Cut manufactured, the long sides of which are gastight by folding are interconnected. In the same way you can all pipes to be described later have been produced.
  • the tube 9, like the feed tube 1, is on only one his coat halves - based on Figure 2 - on his upper Shell half 12 with through openings 13 for the exhaust gas provided that the passage openings 3 of the feed pipe 1st are arranged diametrically opposite.
  • the from the Thru openings 3 flowing out and in Exhaust gas flow moving in circumferential direction will change in split two partial flows, the flow direction of the a partial flow essentially clockwise and that of the other partial flow essentially contrary to the Is directed clockwise (see chain line in Fig. 2).
  • the tube 9 is in turn coaxial from one to it arranged further pipe 14 surrounded, the front Ends are also firmly connected to the walls 7, 8.
  • the tube 14 is also with Passage openings 15 for the exhaust gas provided in also only one of its jacket halves - based on Figure 2 - Are arranged in its lower half jacket 16.
  • Passage openings 13 of the tube 14 also diametrically across from.
  • the space delimited by the tubes 9 and 14 forms another chamber 17 for the exhaust gas, which is the same as the first Chamber 11 serves as a reflection chamber.
  • the tube 14 is in turn surrounded by a perforated jacket 18, which is also fixed to the end walls 7, 8 connected is. That of the perforated jacket 18 and the tube 14 bounded space forms a second chamber 19 which as Absorption chamber is formed.
  • the perforated jacket 18 and the outer tube 6 have in their Passage openings 15 diametrically opposite area an outlet opening 22 for the exhaust gas, so that the through the openings 15 entering the chamber 19 Exhaust gas flow share in the area of the passage openings 15 and pulsating in the form of two partial flows Exit opening 22 will move.
  • This is with one Discharge tube 23 connected, the longitudinal axis of which is transverse to the longitudinal axis of the feed tube 1 directed and approximately in the middle of the Total length of the housing 5 is arranged, so that relaxed exhaust gas in the direction of the arrow from the discharge pipe 23 of the exhaust silencer flows out.
  • FIG. 3 corresponds in its basic structure, the structure of that in FIG. 2 illustrated embodiment.
  • Figure 3 are for the matching parts, therefore, the same reference numerals as used in Figures 1 and 2.
  • the difference between the two embodiments lies in essentially in a slightly different arrangement of the Passages 3, 13 and 15 and the subdivision of second chamber 19 and the further chamber 17th
  • Partition 25 As can be seen from FIG. 3, there is one inside the chamber 17 Partition 25 and a partition 26 within chamber 19 intended. Both partitions 25, 26 extend over the entire length of the housing 5.
  • the arrangement is such that the by Passage openings 3 'leaving the feed pipe 1 Exhaust gas flow divides as in the first embodiment, and the two partial flows in each other opposite directions in the circumferential direction of the tube 9 flow through the chamber 11 and become the Move through openings 13 'of the tube 14.
  • the exhaust gas Due to the arrangement of the partition wall 25 for the exhaust gas shortest path between the passage openings 13 'and 15' blocked, the exhaust gas must cover almost the entire circumference of the chamber 17 flow through, so that this is the longest possible Exhaust gas path and thus maximum relaxation of the exhaust gas results.
  • the flow conditions of the exhaust gas are similar its passage through the passage openings 15 'of Rohres 14.
  • the exhaust gas flowing out of these is because the Partition 26 this the shortest route to the outlet opening 22nd the discharge pipe 23 also blocked, the chamber 19 in Wander counterclockwise pulsating and so open the longest possible flow path to the discharge pipe 23.
  • the passage openings 15 ' adjacent side of the partition 26 a kind of exhaust gas cushion form, which also by swirling the from the Partition wall 26 immediately adjacent passage openings 15 ' emerging sound components gradually into the main stream of the exhaust gas is integrated to the outlet opening 22 of the Ableitrohres 23 to arrive.
  • This also results within the chamber 19 the longest possible flow path for the exhaust gas, the one directed in the longitudinal direction of a chamber Flow path has almost 3 times the length.
  • FIG. 1 In the further embodiment shown in FIG Invention is the front wall 7 as an additional Absorption chamber formed. In the same way, too the front wall 8 as a further absorption chamber be trained.

Landscapes

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

Claims (6)

  1. Pot d'échappement insonorisé pour moteurs à combustion interne, muni d'un tube d'amenée du gaz d'échappement qui pénètre, du côté frontal, dans le carter dudit pot et s'étend sensiblement sur toute la longueur de celui-ci, comportant, disposés dans la région de l'une des moitiés de son enveloppe, des orifices de passage du gaz ainsi qu'une première chambre, entourant ledit tube d'amenée et comportant également une deuxième chambre entourant la première, l'enveloppe de la première chambre présentant, sur sa moitié diamétralement opposée aux orifices de passage du tube d'amenée, des orifices de passage des gaz d'échappement, et la deuxième chambre étant reliée à un tube de dérivation qui est orienté sensiblement transversalement par rapport à l'axe longitudinal du tube d'amenée,
       CARACTERISE en ce que la deuxième chambre (19) est entouré d'un tube (6) dont la paroi intérieure est constituée d'une enveloppe perforée (18) disposée concentriquement par rapport à la première chambre (11) et dont l'enveloppe extérieure est disposée excentriquement par rapport à cette enveloppe perforée (18), la région située entre l'enveloppe intérieure et l'enveloppe extérieure étant remplie d'une matière insonorisante.
  2. Pot d'échappement insonorisé selon la revendication 1, caractérisé en ce que, à l'intérieur de la deuxième chambre (19) est prévue, dans une zone proche du tube de dérivation (23), une paroi de séparation (26) qui s'étend sensiblement sur toute la longueur du carter (5) et forme une paroi réfléchissante pour le gaz d'échappement passant à travers les orifices de passage de la première chambre (11).
  3. Pot d'échappement insonorisé selon la revendication 1 comportant une chambre supplémentaire disposée entre la première et la deuxième chambre, caractérisé en ce que, à l'intérieur de la première chambre (11) et la chambre supplémentaire (17), dans une région respectivement proche du tube de dérivation (23), est prévue respectivement une paroi de séparation qui s'étend sensiblement sur toute la longueur du carter( 5), la paroi de séparation (25) disposée à l'intérieur de la chambre supplémentaire (17) formant une paroi réfléchissante pour le gaz d'échappement passant à travers les orifices de passage de la première chambre, tandis que la paroi de séparation disposée à l'intérieur de la première chambre (17 forme une paroi réfléchissante pour le gaz d'échappement passant à travers les orifices de passage du tube d'amenée (1).
  4. Pot d'échappement insonorisé selon la revendication 1, caractérisé en ce que la paroi (7), située à distance de l'entrée du gaz d'échappement dans le carter, est conformée en chambre d'absorption (33).
  5. Pot d'échappement insonorisé selon la revendication 1, caractérisé en ce que, pour former la chambre d'absorption (33) la paroi (8) du carter (5) située du côté frontal est conformée en chambre d'absorption (33).
  6. Pot d'échappement insonorisé selon la revendication 1, caractérisé en ce que, pour former la chambre d'absorption (33), entre la paroi (7) du côté frontal et une paroi intermédiaire (31) disposée à l'extrémité du tube d'amenée (1) est disposée de la matière insonorisante (3) et que ladite paroi intermédiaire (31) présente, dans la région des chambres (11, 17, 19) des orifices de passage (32 pour le gaz d'échappement.
EP95111537A 1994-10-05 1995-07-21 Silencieux de gaz d'échappement Expired - Lifetime EP0705961B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4435662A DE4435662A1 (de) 1994-10-05 1994-10-05 Abgasschalldämpfer
DE4435662 1994-10-05

Publications (2)

Publication Number Publication Date
EP0705961A1 EP0705961A1 (fr) 1996-04-10
EP0705961B1 true EP0705961B1 (fr) 1999-05-06

Family

ID=6530061

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95111537A Expired - Lifetime EP0705961B1 (fr) 1994-10-05 1995-07-21 Silencieux de gaz d'échappement

Country Status (3)

Country Link
EP (1) EP0705961B1 (fr)
AT (1) ATE179777T1 (fr)
DE (2) DE4435662A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10711670B2 (en) 2015-06-17 2020-07-14 Orbital Australia Pty Ltd Muffler

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1432797A (en) * 1920-08-04 1922-10-24 R E M Strickland Muffler
GB276074A (en) * 1926-05-18 1927-08-18 Ole Solberg Bie Improvements in exhaust-silencers
GB376815A (en) * 1931-04-14 1932-07-14 Frederick Heather Improvements in and relating to silencers for gaseous currents
GB1364100A (en) * 1971-11-03 1974-08-21 Stemp L W Gas silnencer
DE2257852C2 (de) 1972-11-25 1986-07-17 Fa. J. Eberspächer, 7300 Esslingen Abgasschalldämpfer für mehrzylindrige Brennkraftmaschinen
US4122913A (en) * 1976-08-09 1978-10-31 Stemp Leslie W Silencer

Also Published As

Publication number Publication date
DE59505829D1 (de) 1999-06-10
DE4435662A1 (de) 1996-04-11
ATE179777T1 (de) 1999-05-15
EP0705961A1 (fr) 1996-04-10

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