EP1510668A1 - Schalldämpfer sowie Abgasanlage - Google Patents
Schalldämpfer sowie Abgasanlage Download PDFInfo
- Publication number
- EP1510668A1 EP1510668A1 EP04017953A EP04017953A EP1510668A1 EP 1510668 A1 EP1510668 A1 EP 1510668A1 EP 04017953 A EP04017953 A EP 04017953A EP 04017953 A EP04017953 A EP 04017953A EP 1510668 A1 EP1510668 A1 EP 1510668A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- exhaust pipe
- exhaust
- silencer
- exhaust gas
- flow direction
- 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
Links
Images
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
-
- 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
- F01N2470/00—Structure or shape of exhaust gas passages, pipes or tubes
- F01N2470/02—Tubes being perforated
- F01N2470/04—Tubes being perforated characterised by shape, disposition or dimensions of apertures
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 silencer points as the actual silencer unit at least one sound absorber, a sound reflector or a Resonator on.
- the silencer unit of the silencer is located above a Variety of openings, such as slots, holes, slots and the like, in flow communication with the exhaust pipe.
- the sound waves of the pulsating Exhaust gas flow through the openings in the silencer unit directed, in which the sound waves in a known manner by absorption or reflection be steamed.
- 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 14, with a silencer according to the invention Is provided.
- the invention proposes, in the flow direction of the Exhaust stream seen in front of the openings turbulators or turbulators to be provided, which is formed in the on the inner surface of the exhaust pipe protrude laminar boundary layers.
- Muffler proposed in the flow direction of the exhaust stream successively to arrange several turbulators. This will Achieves that the exhaust gas flow over a longer pipe section of the exhaust pipe is specifically disturbed in its flow profile, so that even in a distribution the openings which connect the exhaust pipe with the silencer unit, over a comparatively long pipe section the emergence high frequency sounds is prevented.
- the swirling elements according to the invention can be arranged between the openings, without the damping behavior of the muffler is impaired overall.
- Verwirbelungs which in a common Plane arranged transversely to the flow direction of the exhaust stream are uniformly spaced from each other on the inner surface of the exhaust pipe are provided. This will ensure that the boundary layers the flow on the entire inner surface of the exhaust pipe be swirled.
- the openings that the exhaust pipe with the silencer unit connect, but formed only on one side of the exhaust pipe, for example, in a side attached as a Helmholtz resonator tube it is but also sufficient, if only in front of the apertured inner surface portion provided the turbulence of the exhaust pipe are.
- Muffler are each several in a common plane transverse to Flow direction of the exhaust stream seen arranged turbulators grouped together while the individual groups of vortex elements seen in the flow direction of the exhaust stream successively are arranged.
- the swirling elements is a pattern of swirling elements on the inside surface the exhaust pipe feasible, with the flow profile of the exhaust stream be influenced over a longer pipe section of the exhaust pipe can.
- the individual groups of turbulators can be offset be arranged to each other. However, they can also be arranged to each other be that the swirling elements of different groups cover each other, So each on a common line in the flow direction of the exhaust stream are arranged seen.
- the distances between the successive Groups of turbulators kept constant, allowing a uniform Pattern is formed by swirling elements.
- the silencer according to the invention further suggested that the distance between successive arranged Verwirbelungs instituten in the flow direction of the exhaust stream Seen is dimensioned so that the subsequently arranged turbulator is arranged in a section in the exhaust pipe, in which the from immediately upstream swirl caused turbulence the boundary layers of the exhaust gas flow on the inner surface of the exhaust pipe are still effective.
- each one Arrange swirling element before each opening on the exhaust pipe each one Arrange swirling element, so that targeted to the boundary layers in the Area of the respective opening can be influenced.
- the swirling elements are preferably integral with the exhaust pipe educated. However, it may also be useful to the vortex elements as separate components, such as baffles form, which, for example are fixed by welding to the inner surface of the exhaust pipe, to achieve targeted turbulence in curved exhaust pipes.
- the swirling elements by forming the exhaust pipe form in which, for example, from the outside into the outer surface of the Exhaust pipe a profile tool is pressed, which is used to form the Swirling element leads to the inner surface of the exhaust pipe.
- the swirling elements as on the outer surface of the exhaust pipe inwardly embossed nubs formed.
- the punched out of the respective opening material remainder not completely separate, but inward into the exhaust pipe so bend over that the remainder of the material acts as a swirling element. It can by appropriate bending and twisting of the remainder of the material very targeted on the flow behavior of the exhaust stream immediately before the opening Be influenced.
- the height of the turbulators should be such that they are larger is the maximum possible thickness of resulting laminar boundary layers. So has been shown in experiments that the height of each turbulence element in radial direction transverse to the flow direction of the exhaust gas stream so considered should be sized to 1/5 to 1/15 of the diameter of the exhaust pipe equivalent. Particularly good results could be achieved with swirling elements achieve 1/10 of the diameter of the exhaust pipe.
- each turbulence element transverse to the flow direction of the exhaust stream should be sized so that the vortex element an obstacle effective for the boundary layers of the exhaust stream represents, without this the total exhaust gas flow is significantly affected.
- the width is 1/2 to 1/8, preferably 1/3, of the diameter of the Exhaust pipe corresponds without the total exhaust gas flow noticeable being affected.
- Particularly suitable in the experiments has a length for the swirling element When viewed in the flow direction of the exhaust gas flow, which corresponds to 1/3 to 1/12, preferably 1/6, of the diameter of the exhaust pipe.
- silencer unit is the exhaust pipe with an absorption silencer, a reflection muffler or a resonator in fluid communication.
- a reflection silencer and a resonator are the silencer units same or different type with the exhaust pipe in fluid communication stand, for example, a reflection silencer and a resonator.
- 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 flanges to the casing the exhaust system connected or already in the exhaust system immediately integrated.
- the muffler 10 has a muffler housing 12, which in the illustrated Embodiment has a hollow cylindrical shape.
- the silencer housing 12 is at its two open ends in each case by a cover 14th or 16 closed.
- a hollow cylindrical exhaust pipe extends 18, which formed by on the two covers 14 and 16 receiving openings 20 and 22 in the longitudinal direction of the muffler housing 12th passed through.
- the exhaust pipe 18 is connected to the two covers 14 and 16 of the muffler housing 12 welded.
- a Helmholtz resonator 24 in the form of an L-shaped bent tube 26 arranged, whose formed at the shorter end Pipe opening 28 welded to the outer surface of the exhaust pipe 18 is.
- a transverse to the longitudinal direction of Exhaust pipe 18 extending partition 30 is disposed, which the silencer housing 12 divided into a reflection chamber 32, which serves as a reflection silencer unit 34 is used in the muffler 10 according to the invention.
- the silencer housing 12 divided into a reflection chamber 32 which serves as a reflection silencer unit 34 is used in the muffler 10 according to the invention.
- Out the exhaust pipe 18 in the reflection chamber 32 guided low-frequency sound waves are attenuated here in a known manner by reflection and interference.
- pulsating Exhaust gas flow are at the exhaust pipe 18 a plurality of openings 36th and 38 trained.
- the openings 36 are at the outer surface the exhaust pipe 18 fixed pipe opening 28 of the tube 22 in flow communication.
- the openings 38 connect the exhaust pipe 18 to the reflection chamber 32.
- FIG. 1 further shows, are in front of the openings 36, the exhaust pipe 18 with the Helmholtz resonator 20 connect in a plane transverse to the flow direction R of the exhaust stream seen several turbulators 40 provided which protrude from the inner surface of the exhaust pipe 18 radially inwardly.
- Fig. 2 further shows, in which a section along the section line II-II in Fig. 1 is shown, the swirling elements 40 are only immediately in front of the with the Helmholtz resonator 24 related, side openings 36 formed on the exhaust pipe 18, but not laterally to these.
- Fig. 3 is in enlarged perspective view of one of the swirling elements 40th shown.
- the swirling element 40 is formed as a knob and was of outside by a molding tool inside into the pipe interior of the exhaust pipe 18 molded.
- the swirling element 40 is designed and dimensioned in this way, that it flows for the along the inner surface of the exhaust pipe 18 along Boundary layer of the exhaust stream is an obstacle through which the Flow profile of the exhaust stream experiences a noticeable turbulence and is specifically disturbed after passing the Verwirbelungsianas 40, without that the total exhaust gas flow is appreciably affected.
- the swirling element 40 is dimensioned in height h, that it corresponds to 1/10 of the diameter of the exhaust pipe 18, so that it is ensured that the swirling element 40 through the laminar boundary layer the exhaust gas flow completely protrudes seen in the radial direction.
- the width of the swirling element 40 corresponds to 1/3 of the diameter of the Exhaust pipe 18, while its length I about 1/6 of the diameter of the exhaust pipe 18 corresponds.
- the seen in the flow direction R of the exhaust gas of the flowed Surface of the Verwirbelungsettis 40 rear side facing away further be designed so that a tear-off edge is formed for the flow, which for additional turbulence in the boundary layer of the exhaust gas flow leads.
- Corresponding turbulence elements 40 are further formed in the pipe section of the exhaust pipe 18, which through the Reflection chamber 32 extends.
- turbulators 40 are provided, in a common plane transverse to the flow direction R of the exhaust gas arranged arranged and combined into groups 42, respectively.
- FIG. 1 further shows, a total of five are seen in the flow direction R.
- groups 42 each of which is constant to each other spaced formed in the exhaust pipe 18 and between which the openings 38 for connecting the exhaust pipe 18 to the reflection chamber 32nd are arranged.
- Fig. 4 further shows, in which a section along the section line IV-IV is shown in Fig.
- the swirling elements 40 are each one Group 42 is uniformly distributed over the inner circumference of the exhaust pipe 18 is formed.
- overlap the Swirl elements 40 of the individual groups 42 i. one swirling element each 40 of each group 42 is each having a swirling element 40 the other groups 42 on a common parallel to the flow direction R extending line along the exhaust pipe 18 is arranged.
- the groups 42 can also be offset from each other, so that the turbulence 40 of different groups 42 different pipe sections influence.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
Abstract
Description
- Fig. 1
- eine schematische Schnittansicht eines erfindungsgemäßen Schalldämpfers mit einem Abgasrohr, einem Helmholtzresonator und einer Reflexionskammer zeigt,
- Fig. 2
- einen Schnitt entlang der Schnittlinie II-II in Fig. 1 zeigt,
- Fig. 3
- eine vergrößerte perspektivische Ansicht durch ein erfindungsgemäßes Verwirbelungselement zeigt und
- Fig. 4
- einen Schnitt entlang der Schnittlinie IV-IV in Fig. 1 zeigt.
- 10
- Schalldämpfer
- 12
- Schalldämpfergehäuse
- 14
- Abdeckung
- 16
- Abdeckung
- 18
- Abgasrohr
- 20
- Aufnahmeöffnung
- 22
- Aufnahmeöffnung
- 24
- Helmholtzresonator
- 26
- Rohr
- 28
- Rohröffnung
- 30
- Trennwand
- 32
- Reflexionskammer
- 34
- Reflexionsschalldämpfereinheit
- 36
- Öffnungen
- 38
- Öffnungen
- 40
- Verwirbelungselemente
- 42
- Gruppen
- R
- Strömungsrichtung
Claims (14)
- Schalldämpfer für eine Abgasanlage eines Kraftfahrzeuges, mit
einem Schalldämpfergehäuse (12), durch das ein Abgasrohr (18) zum Hindurchleiten schallzudämpfender Abgasströme hindurchführt, und mindestens einer Schalldämpfereinheit (24, 34), welche durch Öffnungen (36, 38) mit dem Abgasrohr (18) in Strömungsverbindung steht,
dadurch gekennzeichnet, dass in Strömungsrichtung (R) des Abgasstromes gesehen den Öffnungen (36, 38) vorgeordnet mehrere Verwirbelungselemente (40) von der Innenoberfläche des Abgasrohres (18) nach innen abstehen. - Schalldämpfer nach Anspruch 1, dadurch gekennzeichnet, dass in Strömungsrichtung (R) des Abgasstromes gesehen aufeinanderfolgend mehrere Verwirbelungselemente (40) angeordnet sind.
- Schalldämpfer nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Verwirbelungselemente (40), welche in einer gemeinsamen Ebene quer zur Strömungsrichtung (R) des Abgasstromes angeordnet sind, gleichmäßig zueinander beabstandet an der Innenoberfläche des Abgasrohres (18) vorgesehen sind.
- Schalldämpfer nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass jeweils mehrere in einer gemeinsamen Ebene quer zur Strömungsrichtung (R) des Abgasstromes gesehen angeordnete Verwirbelungselemente (40) zu Gruppen (42) zusammengefaßt sind, und dass die einzelnen Gruppen (42) der Verwirbelungselemente (40) in Strömungsrichtung (R) des Abgasstromes gesehen aufeinanderfolgend angeordnet sind, wobei die Abstände zwischen den aufeinanderfolgenden Gruppen (42) der Verwirbelungselemente (40) vorzugsweise konstant sind.
- Schalldämpfer nach mindestens einem der vorhergehenden Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Abstand zwischen unmittelbar aufeinanderfolgend angeordneten Verwirbelungselementen (40) in Strömungsrichtung (R) des Abgasstromes gesehen so bemessen ist, dass das nachfolgend angeordnete Verwirbelungselement (40) in einem Abschnitt im Abgasrohr (18) angeordnet ist, in welchem die vom unmittelbar vorgeordneten Verwirbelungselement (40) verursachten Verwirbelungen der Grenzschichten des Abgasstromes an der Innenoberfläche des Abgasrohres (18) noch wirksam sind.
- Schalldämpfer nach mindestens einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass jeder Öffnung (40) ein Verwirbelungselement (40) vorgeordnet ist.
- Schalldämpfer nach mindestens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Verwirbelungselemente (40) einstückig mit dem Abgasrohr (18) ausgebildet sind.
- Schalldämpfer nach mindestens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Verwirbelungselemente (40) durch Umformen an der Innenoberfläche des Abgasrohres (18) ausgebildet sind.
- Schalldämpfer nach Anspruch 8, dadurch gekennzeichnet, dass die Verwirbelungselemente (40) als an der Außenoberfläche des Abgasrohres (18) nach innen eingeprägte Noppen ausgeformt sind.
- Schalldämpfer nach mindestens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Höhe (h) jedes Verwirbelungselementes (40) in radialer Richtung quer zur Strömungsrichtung (R) des Abgasstromes betrachtet so bemessen ist, dass sie 1/5 bis 1/15, vorzugsweise 1/10, des Durchmessers des Abgasrohres (18) entspricht.
- Schalldämpfer nach mindestens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Breite (b) jedes Verwirbelungselementes (40) quer zur Strömungsrichtung (R) des Abgasstromes betrachtet so bemessen ist, dass sie 1/2 bis 1/8, vorzugsweise 1/3, des Durchmessers des Abgasrohres (18) entspricht.
- Schalldämpfer nach mindestens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Länge (I) jedes Verwirbelungselementes (40) in Strömungsrichtung (R) des Abgasstromes betrachtet so bemessen ist, dass sie 1/3 bis 1/12, vorzugsweise 1/6, des Durchmessers des Abgasrohres (18) entspricht.
- Schalldämpfer nach mindestens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Schalldämpfereinheit, ein Reflexionsschalldämpfer (34) oder ein Resonator (24) ist.
- Abgasanlage für ein Kraftfahrzeug, mit einem Schalldämpfer (10) nach einem der Ansprüche 1 bis 13.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2003139290 DE10339290A1 (de) | 2003-08-27 | 2003-08-27 | Schalldämpfer sowie Abgasanlage |
| DE10339290 | 2003-08-27 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1510668A1 true EP1510668A1 (de) | 2005-03-02 |
| EP1510668B1 EP1510668B1 (de) | 2006-06-14 |
| EP1510668B8 EP1510668B8 (de) | 2006-09-13 |
Family
ID=34089199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20040017953 Expired - Lifetime EP1510668B8 (de) | 2003-08-27 | 2004-07-29 | Schalldämpfer sowie Abgasanlage |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1510668B8 (de) |
| DE (2) | DE10339290A1 (de) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110146255A1 (en) * | 2009-12-19 | 2011-06-23 | J. Eberspacher Gmbh & Co. Kg | Exhaust gas treatment device |
| US9644509B2 (en) | 2015-02-05 | 2017-05-09 | Ford Global Technologies, Llc | Muffler |
| CN109026301A (zh) * | 2018-10-12 | 2018-12-18 | 天纳克汽富晟(长春)汽车零部件有限公司 | 尾气后处理组件 |
| CN109057917A (zh) * | 2018-09-27 | 2018-12-21 | 上海天纳克排气系统有限公司 | 消音器 |
| CN113482754A (zh) * | 2021-07-30 | 2021-10-08 | 重庆长安汽车股份有限公司 | 一种消声装置及车辆 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4388804A (en) * | 1981-08-17 | 1983-06-21 | J. I. Case Company | Exhaust assembly for tractors |
| DE19639079A1 (de) * | 1996-09-24 | 1998-03-26 | Gillet Heinrich Gmbh | Schalldämpfer |
| US5959263A (en) * | 1998-05-07 | 1999-09-28 | Biggs Manufacturing, Inc. | Bypass muffler |
-
2003
- 2003-08-27 DE DE2003139290 patent/DE10339290A1/de not_active Ceased
-
2004
- 2004-07-29 DE DE200450000756 patent/DE502004000756D1/de not_active Expired - Lifetime
- 2004-07-29 EP EP20040017953 patent/EP1510668B8/de not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4388804A (en) * | 1981-08-17 | 1983-06-21 | J. I. Case Company | Exhaust assembly for tractors |
| DE19639079A1 (de) * | 1996-09-24 | 1998-03-26 | Gillet Heinrich Gmbh | Schalldämpfer |
| US5959263A (en) * | 1998-05-07 | 1999-09-28 | Biggs Manufacturing, Inc. | Bypass muffler |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110146255A1 (en) * | 2009-12-19 | 2011-06-23 | J. Eberspacher Gmbh & Co. Kg | Exhaust gas treatment device |
| US8925308B2 (en) * | 2009-12-19 | 2015-01-06 | Eberspaecher Exhaust Technology Gmbh & Co. Kg | Exhaust gas treatment device |
| US9228478B2 (en) | 2009-12-19 | 2016-01-05 | Eberspaecher Exhaust Technology Gmbh & Co. Kg | Exhaust gas treatment device |
| US9644509B2 (en) | 2015-02-05 | 2017-05-09 | Ford Global Technologies, Llc | Muffler |
| CN109057917A (zh) * | 2018-09-27 | 2018-12-21 | 上海天纳克排气系统有限公司 | 消音器 |
| CN109026301A (zh) * | 2018-10-12 | 2018-12-18 | 天纳克汽富晟(长春)汽车零部件有限公司 | 尾气后处理组件 |
| CN113482754A (zh) * | 2021-07-30 | 2021-10-08 | 重庆长安汽车股份有限公司 | 一种消声装置及车辆 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1510668B8 (de) | 2006-09-13 |
| EP1510668B1 (de) | 2006-06-14 |
| DE10339290A1 (de) | 2005-04-07 |
| DE502004000756D1 (de) | 2006-07-27 |
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