DE4219540B4 - Catalyst arrangement for the purification of a pulsating exhaust gas stream - Google Patents
Catalyst arrangement for the purification of a pulsating exhaust gas stream Download PDFInfo
- Publication number
- DE4219540B4 DE4219540B4 DE4219540A DE4219540A DE4219540B4 DE 4219540 B4 DE4219540 B4 DE 4219540B4 DE 4219540 A DE4219540 A DE 4219540A DE 4219540 A DE4219540 A DE 4219540A DE 4219540 B4 DE4219540 B4 DE 4219540B4
- Authority
- DE
- Germany
- Prior art keywords
- housing
- exhaust gas
- jacket
- area
- catalyst
- 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 - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9445—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC]
- B01D53/9454—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC] characterised by a specific 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
- 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
- F01N3/18—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 methods of operation; Control
- F01N3/20—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 methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
-
- 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
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- 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
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- Toxicology (AREA)
- General Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Exhaust Gas After Treatment (AREA)
- Exhaust Silencers (AREA)
Abstract
Katalysatoranordnung für die Reinigung eines pulsierenden Abgasstromes (22, 53), insbesondere einer Kraftfahrzeug-Brennkraftmaschine, mit einem in einem rohrartigen Mantel (28, 44) angeordneten Katalysator (27, 43), wobei der Mantel (28, 44) nur in einem axial schmalen Umfangsbereich (29, 51), insbesondere seinem Strömungsaustrittsbereich, gasdicht mit einem Gehäuse (20, 41) verbunden ist, welches vor dem Mantel (28, 44) eine Abgaszuströmung (21, 49) und hinter dem Mantel (28, 44) eine Abgasabströmung (30, 52) aufweist, während die anderen Umfangsbereiche des Mantels (28, 44) mit dem Gehäuse (20, 41) einen Spalt (23, 48) bilden, der mit dem abgaserfüllten Raum im Gehäuse (20, 41) in Verbindung steht, dadurch gekennzeichnet, dass das Gehäuse (20, 41) einen radial derart weit eingezogenen Zwischenbereich (25, 40) zwischen Abgaszuströmung (21, 49) oder Abgasabströmung (30, 52) und einem den Spalt (23, 48) umschließenden Gehäusebereich (24, 50) des Gehäuses (20, 41) aufweist, dass ein direkter Aufprall des pulsierenden Abgasstromes (22, 53) auf den Gehäusebereich...catalyst assembly for the Cleaning a pulsating exhaust gas stream (22, 53), in particular a motor vehicle internal combustion engine, with one in a tubular Cloak (28, 44) arranged catalyst (27, 43), wherein the jacket (28, 44) only in an axially narrow peripheral region (29, 51), in particular its flow outlet area, gas-tight with a housing (20, 41), which in front of the jacket (28, 44) an exhaust gas inflow (21, 49) and behind the jacket (28, 44) an exhaust gas outflow (30, 52) during the other peripheral regions of the jacket (28, 44) with the housing (20, 41) form a gap (23, 48) with the exhaust gas filled space in the case (20, 41), characterized in that the housing (20, 41) 41) has a radially so far retracted intermediate region (25, 40) between exhaust gas inflow (21, 49) or exhaust gas outflow (30, 52) and a housing portion (24, 50) enclosing the gap (23, 48) of the housing (20, 41) that has a direct impact of the pulsating exhaust stream (22, 53) on the housing area ...
Description
Die
Erfindung betrifft eine Katalysatoranordnung gemäß dem Oberbegriff des Patentanspruchs 1.
Eine Katalysatoranordnung dieses Aufbaus, wie sie bevorzugt für die Reinigung
der Abgase der Brennkraftmaschine eines Kraftfahrzeugs Einsatz finden
soll, ist aus der
Wie sich gezeigt hat, können jedoch bei einer derartigen Katalysatoranordnung Schwingungsanregungen des Gehäuses durch den pulsierenden Abgasstrom auftreten. Diese Pulsation des Abgasstromes läßt sich nicht unterdrücken, da sie auf dem Arbeitszyklus der Brennkraftmaschine beruht.As has been shown however, in such a catalyst arrangement, vibrational excitations of the housing occur through the pulsating exhaust gas flow. This pulsation of Exhaust stream can be do not suppress because it is based on the duty cycle of the internal combustion engine.
Der Erfindung liegt demgemäß die Aufgabe zugrunde, eine gattungsgemäße Katalysatoranordnung zu schaffen, bei der unter Wahrung ihrer grundlegenden Vorteile eine derartige Schwingungsanregung zumindest weitgehend unterbunden ist.Of the Invention is therefore based on the object a generic catalyst arrangement while preserving its basic benefits such oscillation excitation at least largely prevented is.
Die erfindungsgemäße Lösung dieser Aufgabe besteht in den kennzeichnenden Merkmalen des Hauptanspruchs, vorteilhafte Ausführungen der Erfindung beschreiben die Unteransprüche.The inventive solution this The object is the characterizing features of the main claim, advantageous embodiments The invention describes the subclaims.
Ein besonderer Vorteil der Erfindung ist darin zu sehen, daß sie die gestellte Aufgabe mit sehr einfachen Maßnahmen löst, die nämlich lediglich dafür zu sorgen brauchen, daß der definierte Spalt zwar nach wie vor in Verbindung mit der Abgasströmung steht, so daß der gewünschte Aufheizeffekt sichergestellt ist, andererseits aber pulsierendes Abgas nicht unmittelbar unter Abgabe seiner Schwingungsenergie auf das Gehäuse auftrifft.One particular advantage of the invention is the fact that they are the solved task with very simple measures, namely, only to ensure need that defined gap is still in connection with the exhaust gas flow, so that the desired Heating effect is ensured, on the other hand pulsating Exhaust gas not immediately under the delivery of its vibrational energy the housing incident.
Im
folgenden wird die Erfindung anhand der Zeichnung erläutert, deren
Figuren Axialschnitte darstellen. Während
Betrachtet
man zunächst
Wie
durch den Verlauf der Abgasströmungspfeile
In
dem Ausführungsbeispiel
nach
Die
Konstruktion nach
In
diesem Ausführungsbeispiel
ist der manschettenartige Bereich
Wie
auch der Verlauf der Strömungspfeile
Mit der Erfindung ist demgemäß mit einfachen Mittel eine gattungsgemäße Katalysatoranordnung geschaffen, die gegen Schwingungsanregung durch die pulsierende Abgasströmung gesichert ist.With The invention is accordingly simple Means a generic catalyst arrangement created against vibration excitation by the pulsating exhaust gas flow is secured.
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4219540A DE4219540B4 (en) | 1991-06-28 | 1992-06-15 | Catalyst arrangement for the purification of a pulsating exhaust gas stream |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4121358 | 1991-06-28 | ||
DEP4121358.0 | 1991-06-28 | ||
DE4219540A DE4219540B4 (en) | 1991-06-28 | 1992-06-15 | Catalyst arrangement for the purification of a pulsating exhaust gas stream |
Publications (2)
Publication Number | Publication Date |
---|---|
DE4219540A1 DE4219540A1 (en) | 1993-01-07 |
DE4219540B4 true DE4219540B4 (en) | 2008-02-28 |
Family
ID=25904994
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE4219540A Expired - Fee Related DE4219540B4 (en) | 1991-06-28 | 1992-06-15 | Catalyst arrangement for the purification of a pulsating exhaust gas stream |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE4219540B4 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10356000B4 (en) * | 2003-11-27 | 2006-01-12 | J. Eberspächer GmbH & Co. KG | Silencer with integrated catalytic converter |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4026521A1 (en) * | 1989-09-02 | 1991-03-07 | Volkswagen Ag | Exhaust gas catalytic purifier matrix with external heating - maximises hot gas access by welding to outer casing at outlet end only |
-
1992
- 1992-06-15 DE DE4219540A patent/DE4219540B4/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4026521A1 (en) * | 1989-09-02 | 1991-03-07 | Volkswagen Ag | Exhaust gas catalytic purifier matrix with external heating - maximises hot gas access by welding to outer casing at outlet end only |
Also Published As
Publication number | Publication date |
---|---|
DE4219540A1 (en) | 1993-01-07 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8120 | Willingness to grant licences paragraph 23 | ||
8110 | Request for examination paragraph 44 | ||
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |