DE102005041659A1 - Exhaust system device for internal combustion engine, has exhaust cooling device with heat exchanger that is connected at utilization point of exhaust tract using feed exhaust duct and at feedback connection using feed back duct to tract - Google Patents
Exhaust system device for internal combustion engine, has exhaust cooling device with heat exchanger that is connected at utilization point of exhaust tract using feed exhaust duct and at feedback connection using feed back duct to tract Download PDFInfo
- Publication number
- DE102005041659A1 DE102005041659A1 DE102005041659A DE102005041659A DE102005041659A1 DE 102005041659 A1 DE102005041659 A1 DE 102005041659A1 DE 102005041659 A DE102005041659 A DE 102005041659A DE 102005041659 A DE102005041659 A DE 102005041659A DE 102005041659 A1 DE102005041659 A1 DE 102005041659A1
- Authority
- DE
- Germany
- Prior art keywords
- exhaust
- exhaust gas
- catalyst
- duct
- tract
- 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.)
- Withdrawn
Links
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
- F01N3/04—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust using liquids
- F01N3/043—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust using liquids without contact between liquid and exhaust gases
-
- 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
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
- F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust 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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged 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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
- F01N13/0093—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series the purifying devices are of the same type
-
- 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
- F01N3/105—General auxiliary catalysts, e.g. upstream or downstream of the main catalyst
-
- 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
- F01N3/18—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
- F01N3/2046—Periodically cooling catalytic reactors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/005—Exhaust driven pumps being combined with an exhaust driven auxiliary apparatus, e.g. a ventilator
-
- 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
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0814—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with catalytic converters, e.g. NOx absorption/storage reduction catalysts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2060/00—Cooling circuits using auxiliaries
- F01P2060/16—Outlet manifold
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
- F02B39/02—Drives of pumps; Varying pump drive gear ratio
- F02B39/12—Drives characterised by use of couplings or clutches therein
-
- 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
-
- 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
- Y02T10/40—Engine management systems
Landscapes
- 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)
- Materials Engineering (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
Die Erfindung betrifft eine Vorrichtung für ein Abgassystem für einen Verbrennungsmotor mit einem an diesen angeschlossenen Haupt-Abgaskanal und einer Katalysatoranordnung.The The invention relates to a device for an exhaust system for a Internal combustion engine with a main exhaust duct connected thereto and a catalyst arrangement.
Die Erfindung betrifft weiterhin ein Verfahren zum Betrieb einer Vorrichtung für ein Abgassystem mit einem NOx-Speicherkatalysator.The The invention further relates to a method for operating a device for a Exhaust system with a NOx storage catalytic converter.
Verbrennungsmotore verfügen nach dem Stand der Technik über eine Abgasreinigung mit einem oder mehreren Katalysatoren. Die Reinigungswirkung wird dabei durch eine Edelmetallbeschichtung von Keramik- oder Metallkörpern im Abgassystem erzielt. Die zulässige Maximaltemperatur einer solchen Reinigungsanlage beträgt ca. 950 °C. Treten darüber hinausgehende Temperaturen auf, wird der Träger und/oder die Katalysator-Beschichtung geschädigt oder gar zerstört. Bei Motoren mit magerer Abgasnachbehandlung werden NOx-Speicher-Katalysatoren eingesetzt, deren Beschichtung bei einer Temperatur oberhalb von 750 °C merklich altert.internal combustion engines feature according to the prior art an exhaust gas purification with one or more catalysts. The cleaning effect is characterized by a noble metal coating of ceramic or metal bodies in Achieved exhaust system. The allowed Maximum temperature of such a cleaning system is approx. 950 ° C. Kick it beyond Temperatures on, becomes the carrier and / or the catalyst coating damaged or even destroyed. In engines with lean exhaust aftertreatment are NOx storage catalysts used, the coating at a temperature above 750 ° C noticeably aging.
Wird ein Verbrennungsmotor im Volllast-Bereich betrieben, können diese Temperaturgrenzen nicht sicher eingehalten werden. Ein gängiges Verfahren sieht dann vor, dass das Kraftstoff-Luft-Gemisch angefettet wird, indem ein 5 bis 20% höherer Kraftstoffanteil als eigentlich erforderlich beigegeben wird. Hierdurch verringert sich zwar die Abgastemperatur, gleichzeitig steigt jedoch der Verbrauch an Kraftstoff sowie die Abgasemission.Becomes a combustion engine operated at full load, these can Temperature limits can not be safely adhered to. A common procedure then provides that the fuel-air mixture is greased, by giving a 5 to 20% higher fuel content as actually required is added. This reduces Although the exhaust gas temperature, at the same time but the consumption increases to fuel and the exhaust emission.
Weitere
Maßnahmen
zur Begrenzung der Temperatur im Katalysator werden in der
- – Öffnen eines Absperrventils in einem Umgehungskanal zum Katalysator,
- – Umlenken des Fahrtwindes auf den Abgaskanal oder den Katalysator,
- – Öffnen der Isolierschalen des Abgaskanals
- – Einblasen von Luft in den Zwischenraum eines doppelwandigen Abgaskanals
- Opening a shut-off valve in a bypass channel to the catalytic converter,
- - diverting the airstream to the exhaust duct or the catalyst,
- - Opening the insulating shells of the exhaust duct
- - Blowing air into the space of a double-walled exhaust duct
Die beschriebenen Maßnahmen bedingen im Allgemeinen bewegliche Teile in der Abgasanlage, die wegen der hohen Temperatur, möglicher Korrosion oder Verrußung sowie wegen Vibration und Verschleiß problematisch sind. Wird ein Absperrventil und ein Umgehungskanal eingesetzt, kann es vorkommen, dass sich bei der Umschaltung der Abgasgegendruck und das Gasschwingverhalten der Abgasanlage ändern. Weiterhin kann ein solches Absperrventil wegen der möglichen hohen Temperaturen nicht motornahe eingebaut werden, wodurch die Option eines motornahen Vorkatalysators entfällt, der bezüglich der schnellen Aufheizung beim Kaltstart und der Betriebstemperatur im Schwachlastbetrieb besonders geeignet ist.The measures described generally involve moving parts in the exhaust system that because of the high temperature, more possible Corrosion or sooting and are problematic because of vibration and wear. Becomes a shut-off valve and a bypass channel used, it may happen that when switching the exhaust back pressure and the gas swing behavior change the exhaust system. Furthermore, such a check valve because of the possible high temperatures are not installed close to the engine, which makes the option a near-engine pre-catalyst is omitted, with respect to the fast heating during cold start and the operating temperature in the Low load operation is particularly suitable.
Es ist Aufgabe der Erfindung, die vorgenannten Probleme zu vermindern.It The object of the invention is to reduce the aforementioned problems.
Vorteile der ErfindungAdvantages of invention
Die Aufgabe betreffend der Vorrichtung wird dadurch gelöst, dass im Abgasstrang zwischen dem Haupt-Abgaskanal und der Katalysatoranordnung eine zuschaltbare Abgaskühlvorrichtung mit einem Wärmetauscher vorgesehen ist, die an einer Entnahmestelle des Abgasstranges mittels eines Zuführ-Abgaskanals und an einer Rückführungsverbindung mittels eines Rückführungskanals am Abgasstrang angeschlossen ist. Durch die zuschaltbare Abgaskühlvorrichtung kann beim Kaltstart eine schnelle Aufheizung und damit Funktionsbereitschaft der Katalysatoranordnung erreicht werden, während hohe Abgas-Temperaturen sicher verhindert werden können, indem bei Bedarf zumindest ein Teil des Abgases über die Kühlvorrichtung geleitet wird. Die Aktivierung der Abgas-Kühlvorrichtung kann dabei über einen Verdichter erfolgen, der in ausreichendem Abstand vom Haupt-Abgaskanal angeordnet ist, so dass er durch die auftretenden Temperaturen nicht beschädigt wird. Bei Bedarf kann er in Flußrichtung des Abgases hinter dem Wärmetauscher angeordnet sein. Die Katalysatoranordnung kann somit nahe am Haupt-Abgaskanal angeordnet sein, wodurch eine schnelle Aufheizung und damit Betriebsbereitschaft erreicht werden kann. Durch die erfindungsgemäße Anordnung kann auf eine Kühlung des Abgases durch anfetten verzichtet werden und somit der Verbrauch an Kraftstoff als auch die Abgaswerte verringert werden. Wird zur Abgasnachbehandlung ein NOx-Speicherkatalysator eingesetzt, kann durch die Abgas-Kühlvorrichtung der Kraftstoff sparende Magerbetrieb zu höherer Motorlast ausgedehnt werden. Insgesamt kann auch eine längere Lebensdauer der Katalysatoranordnung erreicht werden.The Problem concerning the device is achieved in that in the exhaust line between the main exhaust passage and the catalyst arrangement a switchable exhaust gas cooling device with a heat exchanger is provided, which at an extraction point of the exhaust line by means of a feed exhaust passage and at a feedback connection by means of a return channel connected to the exhaust system. Through the switchable exhaust gas cooling device can during cold start a fast heating and thus operational readiness the catalyst arrangement can be achieved while high exhaust gas temperatures can be safely prevented by passing at least a portion of the exhaust gas over the cooling device as needed. The activation of the exhaust gas cooler can do it over a Compressor, which is at a sufficient distance from the main exhaust duct is arranged so that it is not damaged by the temperatures occurring. If necessary, he can in the flow direction of Exhaust gas behind the heat exchanger be arranged. The catalyst arrangement can thus close to the main exhaust passage be arranged, whereby a rapid heating and thus operational readiness achieved can be. By the arrangement according to the invention can on a cooling the exhaust gas can be dispensed by enriching and thus the consumption be reduced to fuel and exhaust emissions. Is becoming Exhaust aftertreatment a NOx storage catalyst used can through the exhaust gas cooler the fuel-saving lean operation extended to higher engine load become. Overall, also a longer life of the catalyst arrangement be achieved.
Ist als Katalysatoranordnung ein Vorkatalysator und ein Haupt-Katalysator vorgesehen, kann erreicht werden, dass die Katalysatoranordnung besonders schnell ihre Betriebstemperatur erreicht.If a precatalyst and a main catalyst are provided as the catalyst arrangement, it can be achieved that the catalyst arrangement be particularly quickly reaches its operating temperature.
Ist als Kühlmittel im Wärmetauscher Umgebungsluft vorgesehen, steht eine praktisch beliebig große Menge Kühlmittel zur Verfügung, ist eine Kühlflüssigkeit als Kühlmittel vorgesehen, kann die Wärmeabfuhr pro Fläche des Wärmetauschers stark vergrößert werden und das Bauteil kleiner ausgelegt werden.is as a coolant in the heat exchanger Ambient air provided, is a practically arbitrarily large amount coolant to disposal, is a coolant as a coolant provided, the heat dissipation per area of the heat exchanger be greatly enlarged and the component be made smaller.
Eine Ausführungsform, bei der die Abgas-Kühlvorrichtung besonders einfach zuschaltbar und abschaltbar ist, sieht vor, dass zur Förderung des Abgases durch die Abgas-Kühlvorrichtung ein Verdichter vorgesehen ist.A embodiment, at the exhaust gas cooler is particularly easy to switch on and off, provides that to promote of the exhaust gas through the exhaust gas cooler a compressor is provided.
Ist zur Förderung des Abgases durch die Abgas-Kühlvorrichtung eine Drosselstelle im Haupt-Abgaskanal vorgesehen, ist eine besonders kostengünstige und robuste Anordnung realisierbar, da weniger bewegte Teile vorhanden sind und/oder zumindest die Leistung des Verdichters verringert werden kann. Eine solche Drosselstelle im Haupt-Abgaskanal an der Rückführverbindung kann durch den Venturi-Effekt das Abgas durch die Abgas-Kühlvorrichtung fördern.is to promote of the exhaust gas through the exhaust gas cooler a throttle point provided in the main exhaust passage, is a special inexpensive and robust arrangement feasible because fewer moving parts available are and / or at least reduced the performance of the compressor can be. Such a throttle point in the main exhaust duct at the Return link can promote the exhaust gas through the exhaust gas cooler by the Venturi effect.
Eine bevorzugte Ausführung ohne zusätzliche Energiequelle sieht vor, dass zum Antrieb des Verdichters eine Abgas-Turbine mit einer Antriebswelle vorgesehen ist.A preferred embodiment without additional Energy source provides that to drive the compressor, an exhaust turbine is provided with a drive shaft.
Ist der Verdichter mit der Abgas-Turbine über eine Kupplung verbunden, kann die Kühlwirkung bedarfsgerecht gesteuert werden. Insbesondere kann in dieser Anordnung das Ansprechverhalten einer Einrichtung zur Verbrennungsluftkomprimierung verbessert werden. Die Kupplung kann dabei elektrisch oder hydraulisch betrieben sein.is the compressor is connected to the exhaust turbine via a coupling, can the cooling effect be controlled as needed. In particular, in this arrangement the response of a combustion air compression device be improved. The coupling can be electric or hydraulic be operated.
Ist zur Steuerung des Verdichters ein Steuergerät und ein Temperatursensor vorgesehen, kann eine besonders genaue Einhaltung der optimalen Arbeitstemperatur der Katalysatoranordnung erreicht werden. Insbesondere können die Kaltstarteigenschaften der Katalysatoranordnung verbessert werden.is For controlling the compressor, a control unit and a temperature sensor provided, a particularly accurate adherence to the optimal Working temperature of the catalyst arrangement can be achieved. Especially can the cold start properties of the catalyst arrangement can be improved.
Ein wirksamer Schutz der Katalysatoranordnung wird ermöglicht indem der Temperatursensor im Vorkatalysator und/oder im Hauptkatalysator angeordnet ist.One effective protection of the catalyst arrangement is made possible by the temperature sensor in the primary catalytic converter and / or in the main catalytic converter is arranged.
Wird bei einer Vorrichtung für ein Abgassystem mit einem NOx-Speicherkatalysator die Betriebstemperatur des NOx-Speicherkatalysators durch Führen zumindest eines Teil des Abgases über eine Abgaskühlvorrichtung in nahezu allen Betriebspunkten des Verbrennungsmotors im wesentlichen bei der optimalen Betriebstemperatur von 350°C gehalten, kann erreicht werden, dass der NOx-Speicherkatalysator bei seinem optimalen Wirkungsgrad betrieben wird und somit pro Fläche und Volumen eine maximale Speicherwirkung zeigt. Hierdurch kann bei gleicher Reinigungswirkung das Volumen des Bauteils und/oder seine Edelmetallbeladung verringert werden, wodurch Platz und/oder Kosten eingespart werden können.Becomes in a device for an exhaust system with a NOx storage catalyst operating temperature of the NOx storage catalyst by guiding at least part of the Exhaust gas over an exhaust gas cooling device in almost all operating points of the internal combustion engine substantially maintained at the optimum operating temperature of 350 ° C, can be achieved that the NOx storage catalyst at its optimum efficiency is operated and thus per area and volume shows a maximum storage effect. This can with the same cleaning effect, the volume of the component and / or its precious metal loading can be reduced, creating space and / or Costs can be saved.
Zeichnungdrawing
Die Erfindung wird im Folgenden anhand der in den Figuren dargestellten Ausführungsbeispiele näher erläutert. Es zeigen:The Invention will be described below with reference to the figures shown in the figures Embodiments explained in more detail. It demonstrate:
Beschreibung der Ausführungsbeispieledescription the embodiments
Der
Wärmetauscher
In
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005041659A DE102005041659A1 (en) | 2005-09-02 | 2005-09-02 | Exhaust system device for internal combustion engine, has exhaust cooling device with heat exchanger that is connected at utilization point of exhaust tract using feed exhaust duct and at feedback connection using feed back duct to tract |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005041659A DE102005041659A1 (en) | 2005-09-02 | 2005-09-02 | Exhaust system device for internal combustion engine, has exhaust cooling device with heat exchanger that is connected at utilization point of exhaust tract using feed exhaust duct and at feedback connection using feed back duct to tract |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102005041659A1 true DE102005041659A1 (en) | 2007-03-08 |
Family
ID=37735433
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102005041659A Withdrawn DE102005041659A1 (en) | 2005-09-02 | 2005-09-02 | Exhaust system device for internal combustion engine, has exhaust cooling device with heat exchanger that is connected at utilization point of exhaust tract using feed exhaust duct and at feedback connection using feed back duct to tract |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102005041659A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2700794A2 (en) | 2012-08-22 | 2014-02-26 | Scania CV AB (publ) | Exhaust system |
DE102018119010A1 (en) * | 2018-08-06 | 2020-02-06 | Volkswagen Aktiengesellschaft | Method and device for exhaust gas aftertreatment of an internal combustion engine |
-
2005
- 2005-09-02 DE DE102005041659A patent/DE102005041659A1/en not_active Withdrawn
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2700794A2 (en) | 2012-08-22 | 2014-02-26 | Scania CV AB (publ) | Exhaust system |
DE102018119010A1 (en) * | 2018-08-06 | 2020-02-06 | Volkswagen Aktiengesellschaft | Method and device for exhaust gas aftertreatment of an internal combustion engine |
WO2020030560A1 (en) | 2018-08-06 | 2020-02-13 | Volkswagen Ag | Method and device for the exhaust gas aftertreatment of an internal combustion engine |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE102009015656B4 (en) | Modular EGR system, engine system, and method for cooling an EGR gas flow | |
DE102008040312B4 (en) | System for controlling condensation in the intake tract of an internal combustion engine | |
DE19728353C1 (en) | IC engine with turbo charger | |
EP2751397B1 (en) | Method and device for detecting leaks in a vehicle lubrication system | |
DE102004027593A1 (en) | Automotive diesel or petrol engine with exhaust system with selective catalytic reduction | |
EP0314129A2 (en) | Catalyst installation | |
DE1451915A1 (en) | Diesel engine with pre-compression cooled by turbo cooling | |
DE112009001059T5 (en) | Exhaust-driven auxiliary air pump and products and methods of use | |
DE102005025434A1 (en) | Emission control device for a motor | |
DE102017108185A1 (en) | Control of engine exhaust back pressure after engine cold start | |
DE102007005246A1 (en) | Air supply to automotive piston engine has air pre-heater which is a liquid/gas heat exchanger forming an integral part of an engine cooling system | |
DE102010003337A1 (en) | Motor car, has gas recirculation circuit guided from exhaust gas tract to intake tract of engine via radiator and exhaust gas recirculation valve, and another gas recirculation circuit directly guided from exhaust gas tract to intake tract | |
DE102010017790A1 (en) | Method for limiting and decreasing thermal load of liquid-cooled internal-combustion engine, involves determining temperature of cooling agent | |
DE102017210475B4 (en) | Exhaust control system | |
DE102007058964A1 (en) | Vehicle's internal-combustion engine e.g. diesel engine, charging system, has secondary gas line, conveying device, turbine, air intercooler, cooling devices, bypass line and controllable valves provided to introduce secondary gas flow | |
WO2007104271A1 (en) | Combined heating/warm water system for mobile applications | |
DE102005041659A1 (en) | Exhaust system device for internal combustion engine, has exhaust cooling device with heat exchanger that is connected at utilization point of exhaust tract using feed exhaust duct and at feedback connection using feed back duct to tract | |
EP3470645B1 (en) | Combustion engine, motor vehicle and method for operating a combustion engine | |
DE102010003002B4 (en) | Exhaust gas turbocharger arrangement with exhaust gas recirculation device and exhaust gas compressor | |
DE102004048338C5 (en) | Internal combustion engine | |
DE102004061028B4 (en) | Exhaust gas recirculation system | |
DE102005015999A1 (en) | Catalytic converter heating for internal combustion engine, involves increasing pressure in exhaust gas guide way in relation to exhaust gas back pressure, and partially overlapping opening times of inlet and outlet valves | |
EP1727976B1 (en) | Internal combustion engine having a humidifying device and a heat exchanger | |
DE102013200621A1 (en) | Method for increasing temperature of exhaust-gas cleaning system in V-engine of motor car during operating phase, involves conducting air-fuel-mixture unburnt through cylinder, and supplying mixture to reaction surface of cleaning system | |
DE102018203495A1 (en) | Arrangement with a dual LNT catalyst and its use, motor vehicle and method for treating an exhaust gas flow |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
R012 | Request for examination validly filed |
Effective date: 20120522 |
|
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |