WO2003052243A1 - Vorrichtung und verfahren zur schalldämpfung im abgassystem einer verbrennungskraftmaschine - Google Patents
Vorrichtung und verfahren zur schalldämpfung im abgassystem einer verbrennungskraftmaschine Download PDFInfo
- Publication number
- WO2003052243A1 WO2003052243A1 PCT/EP2002/014229 EP0214229W WO03052243A1 WO 2003052243 A1 WO2003052243 A1 WO 2003052243A1 EP 0214229 W EP0214229 W EP 0214229W WO 03052243 A1 WO03052243 A1 WO 03052243A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- channels
- cross
- sectional area
- subset
- exhaust gas
- Prior art date
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Classifications
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- 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
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
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- 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
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
- F01N3/2807—Metal other than sintered metal
- F01N3/281—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates
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- 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
-
- 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
- F01N1/06—Silencing apparatus characterised by method of silencing by using interference effect
-
- 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
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/022—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
Definitions
- the invention relates to a device for sound absorption in the exhaust system of an internal combustion engine.
- a device for sound absorption in the exhaust system of an internal combustion engine is used, for example, to dampen one or more frequencies which are particularly critical for the internal combustion engine or an automobile operated with it, for example.
- honeycomb bodies A basic construction of such honeycomb bodies is known, for example, from EP 0245 737 B1 or EP 0430945 B1.
- the invention can also be used in other designs, e.g. B. spirally wound designs.
- honeycomb bodies there are also conical designs in one direction, for example from the WO 99/56010 known.
- the manufacturing processes known for honeycomb bodies can also be used for the present invention.
- Recent developments in cell geometry have brought about the use of microstructures in the channel walls, as are known, for example, from WO 90/08249 and WO 99/31362. These developments can also be used additionally for the present invention.
- known measures for producing or improving the effectiveness of such honeycomb bodies can also be applied to the present invention.
- the device according to the invention for sound absorption in an exhaust system of an internal combustion engine comprises such a honeycomb body.
- the honeycomb body has an axial length and has essentially separate channels through which exhaust gas can flow.
- the channels are divided into at least a first subset of channels and a second subset of channels. At least the cross-sectional areas of one of the two subsets of channels change over the axial length of the honeycomb body in such a way that the running time of the exhaust gas is different in the different subsets of channels.
- honeycomb body for soundproofing in the exhaust system of an internal combustion engine, since these are often used, for example, in catalytic converters for exhaust gas purification and are therefore already present in the exhaust system of an automobile.
- This enables noise reduction in the exhaust system without additional components having to be introduced into the exhaust system.
- This provides a structurally simple and inexpensive option for sound attenuation.
- the speed function v (z) can be influenced by changing the cross-sectional area of the duct and the running time of a gas through a duct depends on the one hand on the length of the duct and on the other hand on the speed function in the duct, the running time of an exhaust gas in a duct very precisely adjustable.
- the first subset of channels each has a first input cross-sectional area and a first output cross-sectional area
- the second subset of channels each have a second input cross-sectional area and a second output cross-sectional area over their axial length.
- the ratio of the first input cross-sectional area to the first output cross-sectional area is different than that of the second input cross-sectional area to the second output cross-sectional area.
- the cross-sectional areas of the first subsets of channels and the second subsets of channels change in different ways. This requires a change in speed in both subsets of exhaust gas flowing through the two subsets of channels and consequently a difference in transit time.
- the cross-sectional area of at least a subset of channels increases in the main flow direction z, preferably it increases monotonically and particularly preferably strictly monotonously and / or the cross-sectional area of another subset of channels falls in the main flow direction, preferably it falls monotonously and particularly preferably strictly monotonously
- Monotonous means that part of a channel or the entire channel can have the same cross-sectional area over the axial length L. This is not possible with strictly monotonous gradients; here the cross-sectional area must be continuously increased or reduced over the axial length.
- a further advantageous embodiment of the honeycomb body is particularly preferred, in which at least a subset of channels widens conically and / or at least a further subset of channels narrows conically. Consequently, according to the invention, a first subset of channels cannot change the cross-sectional area over the axial length, while a second subset expands or narrows conically, or else the cross-sectional area increases or decreases monotonically in the main flow direction z. According to the invention it is also possible that a first subset of channels widens conically, while a second subset of channels narrows conically. This allows a very simple construction of a honeycomb body according to the invention.
- the subsets of channels are designed such that different subsets of channels have different integrals of the cross-sectional areas over the axial length.
- an exhaust system of an internal combustion engine has at least one honeycomb body, with channels through which the exhaust gas can flow and an axial length.
- a flow path of a first subset of the exhaust gas is formed by a first subset of ducts and a flow path for a second subset of the exhaust gas is formed by a second subset of ducts.
- the cross-sectional areas of at least one of the two subsets of channels change over the axial length of the honeycomb body. This requires a runtime difference between the two subsets of the exhaust gas.
- at least one frequency of a sound wave in the exhaust gas can be attenuated by appropriately dimensioning the subsets of channels.
- the first subset of channels each have a first input cross-sectional area and a first output cross-sectional area and the second subset of channels each have a second input cross-sectional area and a second output cross-sectional area and the ratio of the first input cross-sectional area to the first output cross-sectional area is different from that of the second input cross-sectional area.
- the cross-sectional area of at least a subset of channels increases in the main flow direction z, preferably it increases monotonously and particularly preferably strictly monotonously and / or falls the cross-sectional area of at least one further subset of channels in the main flow direction z, preferably falls monotonically and particularly preferably strictly monotonously.
- Monotonous means that the cross-sectional area of a part of a channel or of an entire channel does not have to change, but it cannot happen that, for example, a channel widens first and then narrows again later.
- Strictly monotonously increasing means that there are different cross-sectional areas at each coordinate z in the main flow direction, which increase with increasing coordinate z, that is, there is a constant increase.
- an advantageous embodiment of the exhaust system is particularly preferred, in which at least a subset of channels of the at least one honeycomb body widens conically and / or at least a further subset of channels narrows conically. It is thus possible that a first subset of channels widens or narrows conically, while a second subset of channels does not change the cross-sectional area over the axial length. It is also possible that a first subset of channels widens conically, while a second subset of channels narrows conically. This advantageously allows a structurally simple construction of the exhaust system. Not only are conical cross-sectional area changes in the main flow direction z possible, but every monotonous cross-sectional area change is possible and according to the invention.
- different subsystems of channels have different integrals of the cross-sectional areas over the axial length L. This enables the formation of, for example, chambers, widenings and constrictions, with which good sound damping can be achieved, for example, despite existing design restrictions.
- the exhaust system contains at least one honeycomb body which has channels through which exhaust gas can flow and which has an axial length.
- a first subset of the exhaust gas is passed through a first subset of ducts and a second subset of the exhaust gas is passed through a second subset of ducts.
- the cross-sectional areas of at least one of the two subsets of channels change over the axial length of the honeycomb body, so that there is a difference in the running time of the exhaust gas in the different subsets of channels.
- the partial quantities of the exhaust gas are brought together again behind the at least one honeycomb body. According to the invention, this method makes it possible to dampen sound waves of a certain frequency, at least in the exhaust gas.
- the first subset of channels each has a first input cross-sectional area and a first output cross-sectional area
- the second subset of channels each has a second input cross-sectional area and a second output cross-sectional area.
- the ratio of the first input cross-sectional area to the first output cross-sectional area is different from that of the second input cross-sectional area to the second output cross-sectional area.
- the cross-sectional area of at least a subset of channels increases in the main flow direction z, preferably increases monotonously and particularly preferably increases strictly monotonously
- the cross-sectional area of a further subset of channels alternatively or additionally falls, preferably monotonously and particularly preferably strictly monotonously. This allows the method for sound attenuation to be carried out in an advantageously simple manner.
- the exhaust gas flows through at least one honeycomb body which has at least a subset of channels that widen conically and / or at least a further subset of channels that conically narrow. This simplifies the calculation and adjustment of the runtime difference.
- the exhaust gas flows through different subsets of channels which have a different integral of the cross-sectional area over the axial length. This allows, for example the implementation of the method, for example, even under difficult geometric conditions and restrictions.
- the difference in the transit time of the subsets of the exhaust gas is chosen such that when the at least two subsets are combined, there is at least partially destructive interference for at least one frequency.
- the transit time difference between the transit time of the first partial quantity of exhaust gas and the transit time of the second quantity of exhaust gas for sound waves of the angular frequency ⁇ , the wavelength ⁇ and the phase velocity c is set exactly such that
- ⁇ (z) exp ( ⁇ ö # ⁇ + ikz) [A x + A 2 exp (- i (2n + l) ⁇ )).
- the amplitudes A x and A 2 can be adjusted via the ratio of a first input cross-sectional area of the first subset of channels to the second input cross-sectional area of the second subset of channels. If these two amplitudes A and A 2 are exactly the same, the wave with the angular frequency ⁇ is completely extinguished. There is destructive interference.
- the destructive interference arises precisely for a critical frequency. This allows the damping of frequencies that are critical, for example, for the internal combustion engine itself or for the automobile driven by it. For example, this can be a frequency at which resonance effects occur. As a rule, these are undesirable since they represent an increased material load.
- the difference in transit time of the subsets of the exhaust gas is selected such that when the at least two subsets are combined, there is at least partially destructive interference for at least two frequencies. This advantageously allows several critical frequencies to be damped.
- Figure 1 is a schematic drawing of the channel system of a honeycomb body according to the invention.
- FIG. 2 shows a detail from the front view of a first exemplary embodiment of a honeycomb body according to the invention
- FIG. 3 shows a corrugated layer for producing the first exemplary embodiment of a honeycomb body according to the invention
- FIG. 4 shows a detail from the front view of a second exemplary embodiment of a honeycomb body according to the invention
- FIG. 5 shows a structured sheet metal layer for producing the second exemplary embodiment of a honeycomb body according to the invention.
- FIG. 1 shows a part of a honeycomb body 1 according to the invention in longitudinal section in a schematic representation.
- An exhaust gas stream 3 flows into the honeycomb body 1 through an inlet side 2 and leaves it through an outlet side 4.
- the honeycomb body contains two subsets of channels, which differ in the axial length of the channels L due to the change in the channel cross-sectional area.
- the first subset of channels consists of widening channels 5 which have a first input cross-sectional area 6 facing the input side 2 and a larger first output cross-sectional area 7 which faces the output side 4 of the honeycomb body 1.
- the second subset of channels consists of tapered channels 8, which have a second input cross-sectional area 9 facing the input side 2 and a smaller second output cross-sectional area 10, which faces the output side 4 of the honeycomb body 1.
- the first input cross-sectional area 6 corresponds to the second output cross-sectional area 10
- the second input cross-sectional area 9 corresponds to the first output cross-sectional area 7.
- the ratio of the first input cross-sectional area 6 and the first output cross-sectional area 7 is the reciprocal of the ratio of the second input cross-sectional area 9 and the second output cross-sectional area 10.
- each of the channels 5 and 8 the change in cross-sectional area is strictly monotonous.
- the number of channels in both subsets of channels is the same.
- a first subset of exhaust gas flows through the first subset of ducts and a second subset of exhaust gas that consists of the other half flows through the second subset of ducts.
- the two subsets of exhaust gas are mixed and leave the honeycomb body 1 through the outlet side 4. If the exhaust gas stream now contains 3 sound waves of the wavelength ⁇ and the phase velocity c, the intensity of the sound waves when flowing out through the output side 4 of the honeycomb body 1 will generally differ from the intensity when flowing into the honeycomb body 1.
- Each of the two partial gas flows changes its speed due to the change in the cross-sectional areas of the duct.
- an inversely proportional relationship applies to the velocity v of the gas in the main flow direction z with the cross-sectional area through which the gas flows.
- the first subset of exhaust gas slows down in the widening channels 5, while the second subset of exhaust gas in the tapering channels 8 accelerates.
- the speed changes continuously for each of the two subsets of exhaust gas as it flows through the two subsets of channels.
- the running time t j of the first subset of exhaust gas and the running time t 2 of the second subset of exhaust gas then apply
- ⁇ (z) exp (i ⁇ t x + ikz) [A x + A 2 ex ⁇ (- i (2n + ⁇ ) ⁇ )]
- FIG. 2 shows a section of an end view of the input side 2 of an embodiment of a honeycomb body 1 according to the invention.
- This has a first subset of widening channels 5 and a second subset of tapering channels 8.
- the widening channels 5 each have a first smaller input cross-sectional area 6, while the tapering channels 8 each have a second larger input cross-sectional area 9.
- the cross-sectional area change over the axial length L of the honeycomb body is strictly monotonous in both subsets of channels in this exemplary embodiment.
- the honeycomb body is made up of alternating smooth sheet metal layers 12 and corrugated sheet metal layers 13.
- FIG. 3 shows an exemplary embodiment of a corrugated sheet layer 13.
- the corrugated height of this corrugated sheet layer 13 changes in a strictly monotonous manner in the direction of the longitudinal axis, which means that the cross-sectional area of the channels formed by the corrugated sheet layer 13 with an adjacent smooth sheet layer 12 changes changes strictly monotonically in the direction of the longitudinal axis.
- the combination with an adjacent smooth sheet-metal layer 12 creates channels with a first input cross-sectional area 6 on the one hand, and channels with a second input cross-sectional area 9 on the other hand can be installed rotated against each other, so
- a cylindrical honeycomb body 1 can advantageously be constructed, which has widening channels 5 and tapering channels 8.
- the widening channels 5 and the tapering channels 8 alternate in layers, the cross-sectional area of the widening channels 5 increases strictly monotonously from the first input cross section 6 to the first output cross section 7, while the cross-sectional area of the tapering channels 8 strictly monotonously from the second input cross section 9 to second output cross section 10 falls.
- Such a honeycomb body 1 advantageously has no preferred direction with respect to its longitudinal axis due to its layered structure of alternately widening channels 5 and tapering channels 8, so that no installation direction has to be observed when installing the honeycomb body 1.
- FIG. 4 shows a section of a frontal schematic view of a second exemplary embodiment of a honeycomb body 6 according to the invention.
- the honeycomb body 6 is constructed from essentially smooth sheet metal layers 12 and structured sheet metal layers 13 and has a first subset of widening channels 5 and a second subset of channels tapered channels 8.
- the widening channels 5 have a first input cross-sectional area 6 a.
- the tapered channels 8 have a second input cross-sectional area 9.
- the channel cross section decreases in the direction of the main flow direction z.
- FIG. 5 shows a structured sheet-metal layer 13, as it has a honeycomb body shown in FIG. 4.
- This structured sheet metal layer 13 is distinguished by the fact that the structural repeat length 15, which is defined as the distance between two adjacent structure maxima 16, changes continuously over the main flow direction z, which is identical to the longitudinal axis of the structured sheet metal layer 13.
- a subset of channels consists of tapered channels 8, while the other subset of channels consists of widening channels 5.
- the invention makes it possible to use honeycomb bodies that are already present in the exhaust system in addition to targeted sound attenuation in a simple manner.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Silencers (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02793006A EP1456513B1 (de) | 2001-12-17 | 2002-12-13 | Vorrichtung und verfahren zur schalldämpfung im abgassystem einer verbrennungskraftmaschine |
AU2002358702A AU2002358702A1 (en) | 2001-12-17 | 2002-12-13 | Device and method for dampening noise in the exhaust system of an internal combustion engine |
KR1020047009361A KR100909506B1 (ko) | 2001-12-17 | 2002-12-13 | 내연 기관의 배기 시스템 내 소음 감소 장치 및 방법 |
DE50203705T DE50203705D1 (de) | 2001-12-17 | 2002-12-13 | Vorrichtung und verfahren zur schalldämpfung im abgassystem einer verbrennungskraftmaschine |
JP2003553104A JP4255380B2 (ja) | 2001-12-17 | 2002-12-13 | 内燃機関の排気システムにおいて消音するための装置および方法 |
US10/845,663 US7582266B2 (en) | 2001-12-17 | 2004-05-14 | Honeycomb body, exhaust system having the honeycomb body and method for muffling sound in the exhaust system of an internal combustion engine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10162161.2 | 2001-12-17 | ||
DE10162161A DE10162161A1 (de) | 2001-12-17 | 2001-12-17 | Vorrichtung und Verfahren zur Schalldämpfung im Abgassystem einer Verbrennungskraftmaschine |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/845,663 Continuation US7582266B2 (en) | 2001-12-17 | 2004-05-14 | Honeycomb body, exhaust system having the honeycomb body and method for muffling sound in the exhaust system of an internal combustion engine |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003052243A1 true WO2003052243A1 (de) | 2003-06-26 |
Family
ID=7709664
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2002/014229 WO2003052243A1 (de) | 2001-12-17 | 2002-12-13 | Vorrichtung und verfahren zur schalldämpfung im abgassystem einer verbrennungskraftmaschine |
Country Status (10)
Country | Link |
---|---|
US (1) | US7582266B2 (de) |
EP (1) | EP1456513B1 (de) |
JP (1) | JP4255380B2 (de) |
KR (1) | KR100909506B1 (de) |
CN (1) | CN1317492C (de) |
AU (1) | AU2002358702A1 (de) |
DE (2) | DE10162161A1 (de) |
ES (1) | ES2245416T3 (de) |
RU (1) | RU2292468C2 (de) |
WO (1) | WO2003052243A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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US7468166B2 (en) * | 2003-10-06 | 2008-12-23 | J. Eberspaecher Gmbh & Co. Kg | Exhaust gas cleaning apparatus |
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DE10357950A1 (de) * | 2003-12-11 | 2005-07-07 | Emitec Gesellschaft Für Emissionstechnologie Mbh | Abgassystem mit Abgasrückführung und einem Pulsationsdämpfungselement |
DE102006056196A1 (de) * | 2006-11-27 | 2008-05-29 | Mann + Hummel Gmbh | Dieselpartikelfilter mit einem keramischen Filterkörper |
US8557009B2 (en) * | 2004-07-10 | 2013-10-15 | Mann+Hummel Gmbh | Ceramic filter element and method of manufacture |
US8518143B2 (en) * | 2004-07-10 | 2013-08-27 | Mann+Hummel Gmbh | Method for producing a ceramic filter element and filter element |
US20060251548A1 (en) * | 2005-05-06 | 2006-11-09 | Willey Ray L | Exhaust aftertreatment device |
DE102008025593A1 (de) * | 2008-05-28 | 2009-12-03 | Emitec Gesellschaft Für Emissionstechnologie Mbh | Metallischer Wabenkörper mit definierten Verbindungsstellen |
KR20100064876A (ko) * | 2008-12-05 | 2010-06-15 | 현대자동차주식회사 | 배기가스 필터 시스템 |
US8668757B2 (en) * | 2009-02-10 | 2014-03-11 | Mann+Hummel Gmbh | Method for producing a ceramic filter element and filter element |
DE102011100014A1 (de) * | 2011-04-29 | 2012-10-31 | GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) | Schalldämpfer |
CN102230408A (zh) * | 2011-06-27 | 2011-11-02 | 胡洪霞 | 混合型消音器 |
DE102016209058A1 (de) * | 2016-05-25 | 2017-11-30 | Continental Automotive Gmbh | Wabenkörper für die Abgasnachbehandlung |
CN109036366A (zh) * | 2018-09-20 | 2018-12-18 | 郑州静邦噪声振动控制工程技术有限公司 | 阵列式消声器及其异形消声单元 |
US11549414B1 (en) * | 2019-11-07 | 2023-01-10 | Phillip M. Adams | Sound attenuator apparatus and method |
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EP0430945B1 (de) * | 1988-09-22 | 1992-03-11 | Emitec Gesellschaft für Emissionstechnologie mbH | Wabenkörper, insbesondere katalysator-trägerkörper, aus einer mehrzahl verschlungener blechstapel |
DE8900467U1 (de) | 1989-01-17 | 1990-05-17 | Emitec Gesellschaft für Emissionstechnologie mbH, 5204 Lohmar | Metallischer Wabenkörper, vorzugsweise Katalysator-Trägerkörper mit Mikrostrukturen zur Strömungsdurchmischung |
DE4217632A1 (de) * | 1992-05-28 | 1993-05-06 | Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De | Abgasanlage |
US5506026A (en) * | 1993-05-31 | 1996-04-09 | Yamaha Corporation | Wood board and a flooring material made therefrom |
CN2326731Y (zh) * | 1997-05-06 | 1999-06-30 | 南京航空航天大学 | 低噪声低污染新型排气消声器 |
DE19724263A1 (de) * | 1997-06-09 | 1998-12-10 | Emitec Emissionstechnologie | Radialkatalysator, insbesondere für Kleinmotoren |
DE19755354A1 (de) | 1997-12-12 | 1999-06-17 | Emitec Emissionstechnologie | Metallfolie mit Durchbrechungen |
DE19819202A1 (de) * | 1998-04-29 | 1999-11-04 | Emitec Emissionstechnologie | Konischer Wabenkörper und Verfahren zu seiner Herstellung |
FR2789327B1 (fr) * | 1999-02-09 | 2001-04-20 | Ecia Equip Composants Ind Auto | Structure de filtration poreuse et dispositif de depollution la comportant |
-
2001
- 2001-12-17 DE DE10162161A patent/DE10162161A1/de not_active Ceased
-
2002
- 2002-12-13 KR KR1020047009361A patent/KR100909506B1/ko not_active IP Right Cessation
- 2002-12-13 RU RU2004122121/06A patent/RU2292468C2/ru not_active IP Right Cessation
- 2002-12-13 AU AU2002358702A patent/AU2002358702A1/en not_active Abandoned
- 2002-12-13 EP EP02793006A patent/EP1456513B1/de not_active Expired - Lifetime
- 2002-12-13 ES ES02793006T patent/ES2245416T3/es not_active Expired - Lifetime
- 2002-12-13 CN CNB028252985A patent/CN1317492C/zh not_active Expired - Fee Related
- 2002-12-13 JP JP2003553104A patent/JP4255380B2/ja not_active Expired - Fee Related
- 2002-12-13 WO PCT/EP2002/014229 patent/WO2003052243A1/de active IP Right Grant
- 2002-12-13 DE DE50203705T patent/DE50203705D1/de not_active Expired - Lifetime
-
2004
- 2004-05-14 US US10/845,663 patent/US7582266B2/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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US4007908A (en) * | 1975-05-09 | 1977-02-15 | Masoneilan International, Inc. | Process and device for attenuating noise caused by a valve during the expansion of a fluid |
DE4104637A1 (de) * | 1990-02-16 | 1991-08-29 | Bischoff Erhardt Gmbh Co Kg | Katalysator fuer kraftfahrzeuge |
US5506028A (en) * | 1992-04-03 | 1996-04-09 | Emitec Gesellschaft Fuer Emissionstechnologie Mbh | Conical honeycomb body |
US5645803A (en) * | 1994-04-11 | 1997-07-08 | Scambia Industrial Developments Aktiengesellschaft | Catalyst means for the catalytic treatment of exhaust gas catalytic converter |
US6035964A (en) * | 1998-01-28 | 2000-03-14 | Alstom Energy Systems Gmbh | Gas turbine muffler with diffusor |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7468166B2 (en) * | 2003-10-06 | 2008-12-23 | J. Eberspaecher Gmbh & Co. Kg | Exhaust gas cleaning apparatus |
Also Published As
Publication number | Publication date |
---|---|
RU2004122121A (ru) | 2005-10-10 |
DE50203705D1 (de) | 2005-08-25 |
US20040208803A1 (en) | 2004-10-21 |
EP1456513A1 (de) | 2004-09-15 |
JP2005513317A (ja) | 2005-05-12 |
US7582266B2 (en) | 2009-09-01 |
ES2245416T3 (es) | 2006-01-01 |
DE10162161A1 (de) | 2003-07-03 |
CN1317492C (zh) | 2007-05-23 |
RU2292468C2 (ru) | 2007-01-27 |
AU2002358702A1 (en) | 2003-06-30 |
KR20040068590A (ko) | 2004-07-31 |
EP1456513B1 (de) | 2005-07-20 |
KR100909506B1 (ko) | 2009-07-27 |
JP4255380B2 (ja) | 2009-04-15 |
CN1604989A (zh) | 2005-04-06 |
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