DE8713517U1 - Device for cleaning exhaust gases from internal combustion engines - Google Patents
Device for cleaning exhaust gases from internal combustion enginesInfo
- Publication number
- DE8713517U1 DE8713517U1 DE8713517U DE8713517U DE8713517U1 DE 8713517 U1 DE8713517 U1 DE 8713517U1 DE 8713517 U DE8713517 U DE 8713517U DE 8713517 U DE8713517 U DE 8713517U DE 8713517 U1 DE8713517 U1 DE 8713517U1
- Authority
- DE
- Germany
- Prior art keywords
- inlet pipe
- housing
- exhaust gases
- perforations
- internal combustion
- 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
Links
- 239000007789 gas Substances 0.000 title claims description 24
- 238000004140 cleaning Methods 0.000 title claims description 12
- 238000002485 combustion reaction Methods 0.000 title claims description 3
- 238000005192 partition Methods 0.000 claims description 10
- 239000003054 catalyst Substances 0.000 claims description 3
- 238000000746 purification Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000010349 pulsation Effects 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000010970 precious metal Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
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
- 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
-
- 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
- F01N3/2892—Exhaust flow directors or the like, e.g. upstream of catalytic device
-
- 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
- F01N2470/10—Tubes having non-circular cross section
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
Description
Beschreibung:Description:
Die Erfindung betrifft eine Vorrichtung zum Reinigen der Abgase von Verbrennungsmotoren mit einem Gehäuse, einem Einlaßrohr und einem im Gehäuse gelagerten Reinigungselementj beispielsweise einem katalytisch beschichteten Wabenkörper oder einem Partikelfilter.The invention relates to a device for cleaning the exhaust gases of internal combustion engines with a housing, an inlet pipe and a cleaning element mounted in the housing, for example a catalytically coated honeycomb body or a particle filter.
Abgaskatalysatoren für Kraftfahrzeuge sind in einer Vielzahl von Ausführungen bekannt und handelsüblich. Dabfej. wird der Lagerung des Katalysatorelements, beispielsweise ein Keramik-Wabenblock mit Edelmetallbeschichtung, besondere Aufmerksamkeit geschenkt.Catalytic converters for motor vehicles are known and commercially available in a wide range of designs. Particular attention is paid to the storage of the catalyst element, for example a ceramic honeycomb block with a precious metal coating.
Ähnliche Konstruktionen finden sich auch bei Rußfiltern für Dieselmotoren.Similar designs can also be found in soot filters for diesel engines.
Bei den derzeit üblichen Abgasreinigungsvorrichtungen treten häufig zwei Arten von Problemen auf. Das erste Problem ist die Abstrahlung von Schall von der Oberfläche des Gehäuses, ausgelöst durch die Expansion der Abgase im Eingangskonus des Gehäuses. Das zweite ProJhlem ist die Konzentration des Abgasstroms im Bereich des Zentrums des Reinigungselements, was insbesondere durch die dadurch bedingte lokal hohe Gasgeschwindigkeit zu einer nicht optimalen katalytischen Effektivität führt.Two types of problems often occur with the exhaust gas purification devices currently in use. The first problem is the radiation of sound from the surface of the housing, caused by the expansion of the exhaust gases in the inlet cone of the housing. The second problem is the concentration of the exhaust gas flow in the area of the center of the purification element, which leads to suboptimal catalytic effectiveness, particularly due to the resulting high local gas velocity.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung der eingangs genannten Art derart weiterzuentwickeln, daß die beiden vorstehenden Probleme Abstrahlung von Körperschall, Konzentration des Äbgasstroms - durch einfache Maßnahmen behoben werden können.The present invention is based on the object of further developing a device of the type mentioned at the beginning in such a way that the two above-mentioned problems - radiation of structure-borne sound, concentration of the exhaust gas flow - can be eliminated by simple measures.
Diese Aufgabe wird dadurch gelöst, daß das Einlaßrohr in das Gehäuse hineinverlängert ist, seitliche Perforationen aufweist und am Ende Verengt ist*This task is solved by extending the inlet pipe into the housing, having lateral perforations and being narrowed at the end*
It H ■ ii »ti«··It H ■ ii »ti«··
Durch diese stufenweise Expansion der Äbgässtfönmng werden die DrUckpulsationen, die aufgrund der Anordnung der Abgasreinigungsvorrichtungen im vorderen Bereich des Äbgassystems besonders intensiv sind, abgebaut und gleichzeitig ein größerer Teil des Abgasstroms vom Zentrum weg in die Randbereichedes Reinigungselements geleitet. Außerdem wirkt das Ende des Einlaßrohrs als Reflexionsstelle, wodurch eine weitere Reduzierung der Abgasgeräusche durch Interferenz erreicht wird.This gradual expansion of the exhaust gas flow reduces the pressure pulsations, which are particularly intense due to the arrangement of the exhaust gas cleaning devices in the front area of the exhaust system, and at the same time a larger part of the exhaust gas flow is directed away from the center to the edge areas of the cleaning element. In addition, the end of the inlet pipe acts as a reflection point, which further reduces the exhaust gas noise through interference.
Diese Effekte können noch verstärkt werden, wenn gemäß einer Weiterbildung der Erfindung das Ende des Einlaßrohres ganz verschlossen ist.These effects can be further enhanced if, according to a further development of the invention, the end of the inlet pipe is completely closed.
Falls das Gehäuse einen etwa elliptischen oder rechteckähnlichen Querschnitt besitzt, empfiehlt es sich, die Perforationen im Einlaßrohr in Richtung der großen Halbachse auszurichten. Dadurch wird eine direkte Schwingungsanregung des Gehäuses vermieden und das Abgas besser verteilt.If the housing has an elliptical or rectangular cross-section, it is recommended to align the perforations in the inlet pipe in the direction of the major semi-axis. This avoids direct vibration excitation of the housing and distributes the exhaust gas better.
Die durch die Erfindung erreichten Effekte lassen sich noch zusätzlich steigern, wenn vor dem Reinigungselement eine perforierte Zwischenwand im Gehäuse angeordnet wird„ Dabei kann das am Ende verengte oder ganz geschlossene Einlaßrohr an der Trennwand abgestützt sein, so daß die mechanische Stabilität der gesamten Vorrichtung erhöht wird. Die Zwischenwand ermöglicht eine feinere Abstimmung der akustischen Wirkung.The effects achieved by the invention can be further increased if a perforated partition is arranged in the housing in front of the cleaning element. The inlet pipe, which is narrowed at the end or completely closed, can be supported on the partition, so that the mechanical stability of the entire device is increased. The partition enables a finer adjustment of the acoustic effect.
Die Perforationen in Einlaßrohr bzw. Trennwand können als Rund-, Schlitz- oder Schlitzbrückenlöcher geformt sein.The perforations in the inlet pipe or partition wall can be shaped as round, slotted or slotted bridge holes.
Anhand der Zeichnung soll die Erfindung in Form eines Ausführungsbeispiels näher erläutert werden. Es zeigen:The invention will be explained in more detail in the form of an embodiment with reference to the drawing. They show:
ti·· ··♦ ♦··ti·· ··♦♦··
!I I1 ilj I· ·· ·!II 1 ilj I· ·· ·
Pig. 1 einen Teil-^Längsschnitt durch eine Abgäsreinigüngsvörfichtüng, Pig. 1 a partial longitudinal section through an exhaust gas purification device,
Fig. 2 eitlen Schnitt entlang der Linie II-II der Fig. 1 und Fig. 3 eine geänderte Äusführungsform eines Einlaßrohrs.Fig. 2 shows a section along the line II-II of Fig. 1 and Fig. 3 shows a modified embodiment of an inlet pipe.
Fig 1 zeigt einen Längsschnitt durch ein Gehäuse 1 einer Abgasreinigungsvorrichtung im Bereich ihres Einlaßrohrs 2 für die vom Motor kommenden Abgase. Diese Abgase werden in einem Reinigungselement 3, beispielsweise einem keramischen, mit Edelmetall beschichteten Monolithen, oder einem Partikelfilter, gereinigt.Fig. 1 shows a longitudinal section through a housing 1 of an exhaust gas purification device in the area of its inlet pipe 2 for the exhaust gases coming from the engine. These exhaust gases are cleaned in a cleaning element 3, for example a ceramic monolith coated with precious metal, or a particle filter.
Das Einlaßrohr 2 besitzt seitliche Perforationen 4. Sein Ende 5 ist verengt bzw. verschlossen. Dadurch treten die Abgase teilweise oder ganz aus den Perforationen 4 aus. Druckpulsationen im Abgas werden dadurch reduziert, so daß die Wände des Gehäuses 1 praktisch nicht mehr in Schwingungen versetzt werden, wodurch die Abstrahlung von Schall stark reduziert wird. Gleichzeitig werden die Abgase seitlich verteilt, so daß die Randbereiche des Reinigungselements 3 ebenso stark wie das Zentrum irit Abgas beaufschlagt werden.The inlet pipe 2 has lateral perforations 4. Its end 5 is narrowed or closed. As a result, the exhaust gases partially or completely exit the perforations 4. Pressure pulsations in the exhaust gas are reduced so that the walls of the housing 1 practically no longer vibrate, which greatly reduces the emission of sound. At the same time, the exhaust gases are distributed laterally so that the edge areas of the cleaning element 3 are exposed to the same amount of exhaust gas as the center.
Ein noch stärkerer Abbau der Abgasdruckpulsationen und eine noch bessere Verteilung der Abgasströmung wird erreicht durch eine perforierte Zwischenwand 6 vor dem Reinigungselement 3, wobei das Einlaßrohr 3 an dieser Zwischenwand 6 abgestützt ist, was der gesamten Vorrichtung eine erhöhte mechanische Stabilität verleiht.An even greater reduction in exhaust gas pressure pulsations and an even better distribution of the exhaust gas flow is achieved by a perforated partition wall 6 in front of the cleaning element 3, whereby the inlet pipe 3 is supported on this partition wall 6, which gives the entire device increased mechanical stability.
Fig. 2 zeigt die in das Gehäuse 1 eingesetzte Trennwand 6. In der oberen Hälfte sind die Perforationen als Rundlöcher 7, in der unteren Hälfte als Schlitzlöcher 7' dargestellt.Fig. 2 shows the partition wall 6 inserted into the housing 1. In the upper half, the perforations are shown as round holes 7, in the lower half as slotted holes 7'.
Hit· · t · ■ *Hit· · t · ■ *
Auch Schlitzbrückenlöcher sind einsetzbar. Die endgültige Fcf'in der Perforationen kann nach den akustischen Gegebenheiten gewählt Werden.Slotted bridge holes can also be used. The final position of the perforations can be selected according to the acoustic conditions.
Fig. 3 zeigt eine abgewandelte Ausführungsform eines Einläßröhrs 2' . Auch hier sind die Perforationen als Schlitzlöcher 41 ausgebildet. Das Ende 5' des Einlaßrohrs 2' ist sternförmig zusammengepreßt und kann je nach Bedarf ganz oder auch nur teilweise verschlossen werden.Fig. 3 shows a modified embodiment of an inlet tube 2'. Here too, the perforations are designed as slotted holes 4 ' . The end 5' of the inlet tube 2' is pressed together in a star shape and can be completely or partially closed as required.
Untersuchungen haben gezeigt, daß sich die erfindungsgemaße Losung in praktisch alle Katalysatorgehause einbauen laßt und daß mit diesen einfachen Mitteln erhebliche Verbesserungen bei der Reinigung der Abgase und bei der Reduzierung der Körperschallabstrahlung sowie der Mündungsgeräusche erzielt werden können.Investigations have shown that the solution according to the invention can be installed in practically all catalyst housings and that with these simple means, considerable improvements can be achieved in the cleaning of exhaust gases and in the reduction of structure-borne noise and muzzle noise.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE8713517U DE8713517U1 (en) | 1987-10-08 | 1987-10-08 | Device for cleaning exhaust gases from internal combustion engines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE8713517U DE8713517U1 (en) | 1987-10-08 | 1987-10-08 | Device for cleaning exhaust gases from internal combustion engines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE8713517U1 true DE8713517U1 (en) | 1988-01-21 |
Family
ID=6812886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE8713517U Expired DE8713517U1 (en) | 1987-10-08 | 1987-10-08 | Device for cleaning exhaust gases from internal combustion engines |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE8713517U1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4121940A1 (en) * | 1991-07-03 | 1993-01-07 | Audi Ag | Method of removing soot particles from diesel exhaust - has perforated pipe inserted in front of converter |
| DE19923736C1 (en) * | 1999-05-22 | 2001-04-19 | Daimler Chrysler Ag | Exhaust system for automobile engine has funnel-shaped insert fitted into exhaust pipe section leading to catalyser |
| DE102004060775A1 (en) * | 2004-12-17 | 2006-06-29 | Audi Ag | Modular constructed exhaust-gas system for motor vehicle, has hopper units, where one hopper unit is fixed in area of its narrow opening at casing of pipe unit, and another hopper unit is fixed in area of its wide opening at housing unit |
-
1987
- 1987-10-08 DE DE8713517U patent/DE8713517U1/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4121940A1 (en) * | 1991-07-03 | 1993-01-07 | Audi Ag | Method of removing soot particles from diesel exhaust - has perforated pipe inserted in front of converter |
| DE19923736C1 (en) * | 1999-05-22 | 2001-04-19 | Daimler Chrysler Ag | Exhaust system for automobile engine has funnel-shaped insert fitted into exhaust pipe section leading to catalyser |
| DE102004060775A1 (en) * | 2004-12-17 | 2006-06-29 | Audi Ag | Modular constructed exhaust-gas system for motor vehicle, has hopper units, where one hopper unit is fixed in area of its narrow opening at casing of pipe unit, and another hopper unit is fixed in area of its wide opening at housing unit |
| DE102004060775B4 (en) * | 2004-12-17 | 2007-01-18 | Audi Ag | Modular exhaust system for a motor vehicle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE69513092T2 (en) | A method of using a silencer and an apparatus for applying the method in a large diesel engine | |
| DE102011089969B4 (en) | Exhaust treatment device | |
| WO2002010562A1 (en) | Particle filter | |
| EP1179125A1 (en) | Method for reducing harmful components in the exhaust gas of an internal combustion engine, especially a diesel-internal combustion engine | |
| EP0542124A1 (en) | Silencer | |
| DE10162161A1 (en) | Device and method for sound attenuation in the exhaust system of an internal combustion engine | |
| DE8713517U1 (en) | Device for cleaning exhaust gases from internal combustion engines | |
| EP1882090A1 (en) | Exhaust system with two exhaust treatment units | |
| DE3803917A1 (en) | Honeycomb-shaped catalyst support body having equalised intake flow | |
| DE19518536B4 (en) | Exhaust gas purification device for cleaning engine exhaust gases | |
| DE2914159C2 (en) | Exhaust silencer | |
| DE29512732U1 (en) | Silencer for the exhaust system of an internal combustion engine | |
| EP1437489B1 (en) | Exhaust gas system | |
| DE10036401B4 (en) | Device for reducing the harmful components in the exhaust gas of an internal combustion engine, in particular a diesel internal combustion engine | |
| DE102005041733A1 (en) | Exhaust gas after treatment device for e.g. diesel engine, has treatment section arranged between fluid injection unit and silencer in common housing and comprising baffle for exhaust gas mass flow with fluid, e.g. urea water solution | |
| DE2910370C2 (en) | Exhaust system for internal combustion engines with two exhaust lines arranged in parallel | |
| DE4200807C2 (en) | Arrangement for cleaning exhaust gases | |
| AT153438B (en) | Mufflers for internal combustion engines. | |
| DE4234931A1 (en) | Catalytic converter for automotive and other fossil fuel applications - has roughened gas passage surfaces to disrupt laminar gas flow and maximising gas contact with catalytic material | |
| WO2008025600A1 (en) | Filter unit, in particular for the exhaust gas system of an internal combustion engine | |
| DE9314441U1 (en) | Exhaust silencer for diesel engines, especially of commercial vehicles | |
| DE20116088U1 (en) | exhaust system | |
| DE1069945B (en) | ||
| DE2747260C3 (en) | Silencers for core shooters | |
| DE2741716C2 (en) | Absorption rear silencer for internal combustion engines |