DE4410022A1 - Exhaust gas cleaning system for IC engine - Google Patents

Exhaust gas cleaning system for IC engine

Info

Publication number
DE4410022A1
DE4410022A1 DE4410022A DE4410022A DE4410022A1 DE 4410022 A1 DE4410022 A1 DE 4410022A1 DE 4410022 A DE4410022 A DE 4410022A DE 4410022 A DE4410022 A DE 4410022A DE 4410022 A1 DE4410022 A1 DE 4410022A1
Authority
DE
Germany
Prior art keywords
exhaust gas
temperature
catalyst
heat exchanger
engine
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.)
Ceased
Application number
DE4410022A
Other languages
German (de)
Inventor
Wendelin Dipl Ing Kluegl
Thomas Dr Ing Dr Brandmeier
Detlev Dr Ing Dr Schoeppe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to DE4410022A priority Critical patent/DE4410022A1/en
Publication of DE4410022A1 publication Critical patent/DE4410022A1/en
Ceased legal-status Critical Current

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
    • F01N3/08—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
    • 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
    • F01N3/05—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 air, e.g. by mixing exhaust with air
    • 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
    • F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
    • 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
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/02—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a heat exchanger
    • 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
    • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/02—Exhaust treating devices having provisions not otherwise provided for for cooling the device
    • F01N2260/022—Exhaust treating devices having provisions not otherwise provided for for cooling the device using air
    • 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
    • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/02—Exhaust treating devices having provisions not otherwise provided for for cooling the device
    • F01N2260/024—Exhaust treating devices having provisions not otherwise provided for for cooling the device using a liquid
    • 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
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/04—Adding substances to exhaust gases the substance being hydrogen
    • 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
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • 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)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

The exhaust gas cleaning device for an IC engine, partic. a diesel engine, has a catalytic convertor (1) located in its exhaust system. A heat exchanger (2) is located upstream of the catalytic convertor, and is used to regulate the gas temperature to the optimum temperature region at which the catalytic convertor has its optimum efficiency. The heat exchanger is also used to limit the maximum temperature of the exhaust gases. The medium used to regulate the gas temperature can be air (L) or cooling water taken from the engine.

Description

Die Erfindung betrifft eine Abgasreinigungsanlage nach dem Oberbegriff des Patentanspruchs 1.The invention relates to an exhaust gas purification system according to the Preamble of claim 1.

Abgasreinigungsanlagen mit Katalysatoren gehören seit langem zum Stand der Technik. Die Katalysatoren können entweder Oxidationskatalysatoren sein, die ohne zusätzliche Reduk­ tionsmittel arbeiten, oder sie können Reduktionskatalysatoren sein, die mit unterschiedlichen Reduktionsmitteln betrieben werden können. Diese beiden Systeme erreichen einen maximalen Wirkungsgrad nur in einem begrenzten Temperaturbereich, der sich nicht mit dem normalen Abgastemperaturbereich der Brenn­ kraftmaschine deckt.Exhaust gas purification systems with catalytic converters have been around for a long time the state of the art. The catalysts can either Oxidation catalysts that are without additional Reduk tion agents work, or they can reduction catalysts be operated with different reducing agents can be. These two systems reach a maximum Efficiency only in a limited temperature range, the the normal exhaust gas temperature range of the burner engine covers.

Durch die DE-AS 22 22 498 ist eine Abgasanlage bekannt, bei der ein zum Katalysator führendes Vorrohr mit einer Hülle umgeben ist, in der ein Kühlluftstrom geführt ist, der von einer Abgasreinigungsvorrichtung gesteuert wird. Durch die DE-OS 41 27 634 ist es weiter bekannt, den Kühlluftstrom bis zu einem Endrohr der Abgasanlage zu führen, wobei das Endrohr und ein Kühlluftrohr mit dem aus dem Ende austretenden Abgas­ strom eine Saugstrahlpumpe für den Kühlluftstrom bilden.An exhaust system is known from DE-AS 22 22 498, at which is a front pipe leading to the catalytic converter with a casing is surrounded, in which a cooling air flow is guided by an exhaust gas purification device is controlled. Through the DE-OS 41 27 634 it is further known to the cooling air flow to lead to a tail pipe of the exhaust system, the tail pipe and a cooling air pipe with the exhaust gas emerging from the end stream form a suction jet pump for the cooling air flow.

Diese Abgasanlagen dienen dazu, eine gewisse Minimaltempera­ tur zu erzeugen, die bei Abgaskatalysatoren auch als An­ springtemperatur bezeichnet wird. Andererseits darf auch die Maximaltemperatur gewisse Grenzwerte nicht überschreiten, um eine thermische Zerstörung des Katalysators zu verhindern.These exhaust systems serve to maintain a certain minimum temperature to generate tur, which is also an An spring temperature is called. On the other hand, the Maximum temperature does not exceed certain limit values in order to to prevent thermal destruction of the catalyst.

Aus den beiden Veröffentlichungen ist es daher bekannt, die Abgastemperatur in einem gewissen Bereich zu regeln, der sich durch eine Minimaltemperatur für das Anspringverhalten des Katalysators und einer Maximaltemperatur zur Verhinderung einer Zerstörung des Katalysators auszeichnet. It is therefore known from the two publications that Exhaust gas temperature to regulate in a certain range, which is by a minimum temperature for the light-off behavior of the Catalyst and a maximum temperature for prevention characterized by destruction of the catalyst.  

Wie eingangs erwähnt, liegt der beste Wirkungsgrad bei einem Katalysator in der Regel in einem Bereich, der von der Abgas­ temperatur der Brennkraftmaschine verschieden ist. Dabei ist dieser Bereich wesentlich enger als der obenerwähnte Bereich für die Minimaltemperatur und die Maximaltemperatur.As mentioned at the beginning, the best efficiency is one Catalyst usually in an area that is off the exhaust temperature of the internal combustion engine is different. It is this area is much narrower than the area mentioned above for the minimum temperature and the maximum temperature.

Im Zuge der immer strenger werdenden Abgasvorschriften ist es daher erforderlich, den optimalen Bereich als Betriebsbereich des Katalysators zu wählen.In the wake of increasingly stringent emissions regulations, it is therefore, the optimal range is required as the operating range to choose the catalyst.

Es ist Aufgabe der Erfindung, Maßnahmen mit möglichst einfa­ chen Mitteln aufzuzeigen, wie der optimale Betriebsbereich des Katalysators erreicht werden kann.It is an object of the invention to take measures with as simple as possible means to show how the optimal operating range of the catalyst can be achieved.

Diese Aufgabe wird durch den Patentanspruch 1 gelöst. Vor­ teilhafte Weiterbildungen sind in den Unteransprüchen gekenn­ zeichnet.This object is solved by claim 1. Before partial further training is known in the subclaims draws.

Die Erfindung wird nun anhand von drei Figuren näher erläu­ tert.The invention will now be explained in more detail with reference to three figures tert.

Es zeigen:Show it:

Fig. 1 eine graphische Darstellung der relativen Änderung der Partikelkomponenten in Abhängigkeit von der Abgastempera­ tur am Beispiel eines Oxidationskatalysators; Figure 1 is a graphical representation of the relative change in the particle components as a function of the exhaust gas temperature using the example of an oxidation catalyst.

Fig. 2 eine graphische Darstellung einer Stickstoff-Konver­ sion des Katalysators in Abhängigkeit von der Abgastemperatur am Beispiel eines Magerkatalysators; und Figure 2 is a graphical representation of a nitrogen conversion of the catalytic converter as a function of the exhaust gas temperature using the example of a lean catalytic converter; and

Fig. 3 ein Abgassystem in schematischer Darstellung. Fig. 3 shows an exhaust system in a schematic representation.

Bei der in Fig. 1 gezeigten graphischen Darstellung ist die relative Änderung der Partikelkomponenten in % in Abhängig­ keit von der Abgastemperatur in °C gezeigt. Man kann aus dieser Darstellung erkennen, daß der optimale Arbeitsbereich zwischen einer Abgastemperatur von etwa 175°C bis 300°C liegt. Bei einer höheren Temperatur steigt der Anteil der Sulfate stark an, während bei einer niedrigeren Temperatur der Anteil an organisch lösbaren Stoffen wie Kohlenwasser­ stoff stark ansteigt. Ein erhöhter Anteil an Sulfaten ist insbesondere aus dem Grund zu vermeiden, da dieser Anteil in einem Abgastest bei der Messung der Partikelmasse miterfaßt wird, so daß dies dazu führen kann, daß ein Abgastest nicht bestanden wird.In the graphical representation shown in FIG. 1, the relative change of the particle components in% as a function of the exhaust gas temperature is shown in ° C. It can be seen from this illustration that the optimal working range is between an exhaust gas temperature of about 175 ° C to 300 ° C. At a higher temperature, the proportion of sulfates rises sharply, while at a lower temperature, the proportion of organically soluble substances such as hydrocarbon rises sharply. An increased proportion of sulfates should be avoided in particular because this proportion is also included in an exhaust gas test when measuring the particle mass, so that this can lead to an exhaust gas test not being passed.

In Fig. 2 ist die Stickstoffoxid-Konversion des Magerkataly­ sators mit Wasserstoff als Reduktionsmittel in Abhängigkeit von der Abgastemperatur gezeigt. Man sieht daraus, daß die Konversion des Katalysators bei etwa 80°C am größten ist, wenn als Randbedingung 10% Sauerstoff, 1000 ppm NOx und 1% Wasserstoff gebildet wird. Daraus folgt, daß die optimale Abgastemperatur für den Betrieb des Katalysators bei etwa 80°C liegt.In FIG. 2, the nitric oxide conversion of Magerkataly crystallizer is shown with hydrogen as a reducing agent depending on the exhaust gas temperature. It can be seen from this that the conversion of the catalyst is greatest at about 80 ° C. when 10% oxygen, 1000 ppm NOx and 1% hydrogen are formed as a boundary condition. It follows that the optimum exhaust gas temperature for the operation of the catalyst is about 80 ° C.

In Fig. 3 ist eine schematische Darstellung, bei der eine Brennkraftmaschine 3 angedeutet ist, die mit einem Ansaug­ trakt 4 in Verbindung steht. Abgasseitig steht die Brenn­ kraftmaschine 3 mit einem Auspuffkrümmer 5 in Verbindung, der über ein Rohr 8 zu einem Wärmetauscher 2 führt. Ein weiteres Rohr 9 verbindet den Wärmetauscher 2 mit einem Katalysator 1, wobei die Abgase über ein sich daran anschließendes Rohr 10 ausgestoßen werden. Im gezeigten Fall mündet eine Zuführungs­ leitung 7 in das Rohr 9 ein, wobei die Zuführungsleitung mit einem Dosiersystem 6 für ein Reduktionsmittel in Verbindung steht. Je nach dem Typ des Katalysators kann die Reduktions­ mittelversorgung vorhanden sein oder weggelassen werden.In Fig. 3 is a schematic representation, in which an internal combustion engine 3 is indicated, the tract with an intake 4 is connected. On the exhaust gas side, the internal combustion engine 3 is connected to an exhaust manifold 5 , which leads via a pipe 8 to a heat exchanger 2 . Another pipe 9 connects the heat exchanger 2 to a catalytic converter 1 , the exhaust gases being expelled via a pipe 10 connected to it. In the case shown, a feed line 7 opens into the tube 9 , the feed line being connected to a metering system 6 for a reducing agent. Depending on the type of catalyst, the reducing agent supply may be present or may be omitted.

Links vom Wärmetauscher 2 ist durch die vier Pfeile die auf den Wärmetauscher auftreffende Kühlluft L angedeutet. Über eine nicht gezeigte Regeleinrichtung wird die Kühlluft so gesteuert, daß die Abgastemperatur auf einen Wert geregelt wird, bei der der betreffende Katalysator seinen optimalen Wirkungsgrad aufweist.The cooling air L striking the heat exchanger is indicated by the four arrows to the left of the heat exchanger 2 . The cooling air is controlled via a control device (not shown) in such a way that the exhaust gas temperature is regulated to a value at which the catalytic converter in question has its optimum efficiency.

Claims (6)

1. Abgasreinigungsanlage für eine Brennkraftmaschine, insbe­ sondere für eine Diesel-Brennkraftmaschine, in deren Abgas­ strang ein Katalysator (1) angeordnet ist, dadurch gekennzeichnet, daß stromaufwärts des Katalysators (1) im Abgasstrang ein Wärmetauscher (2) angeordnet ist, durch den die Abgastempera­ tur auf einen gewünschten Temperaturbereich, bei dem der Katalysator einen optimalen Wirkungsgrad hat, regelbar ist.1. Exhaust gas purification system for an internal combustion engine, in particular special for a diesel internal combustion engine, in the exhaust gas strand a catalyst ( 1 ) is arranged, characterized in that a heat exchanger ( 2 ) is arranged in the exhaust gas line upstream of the catalyst ( 1 ) through which the Exhaust gas temperature can be regulated to a desired temperature range at which the catalytic converter has an optimal efficiency. 2. Abgasreinigungsanlage nach Anspruch 1, dadurch ge­ kennzeichnet, daß durch den Wärmetauscher (2) die ma­ ximale Abgastemperatur begrenzbar ist.2. Exhaust gas purification system according to claim 1, characterized in that the ma ximal exhaust gas temperature can be limited by the heat exchanger ( 2 ). 3. Abgasreinigungsanlage nach Anspruch 1, dadurch ge­ kennzeichnet, daß das die Temperatur beeinflussende Medium Luft (L) ist.3. Emission control system according to claim 1, characterized ge indicates that the temperature influencing Medium is air (L). 4. Abgasreinigungsanlage nach Anspruch 1, dadurch ge­ kennzeichnet, daß das die Temperatur beeinflussende Medium Kühlwasser für die Brennkraftmaschine ist.4. Emission control system according to claim 1, characterized ge indicates that the temperature influencing Medium is cooling water for the internal combustion engine. 5. Abgasreinigungsanlage nach Anspruch 1, dadurch ge­ kennzeichnet, daß dem Katalysator (1) über ein Dosier­ system (6) zumindest ein Reduktionsmittel zuführbar ist, wobei die Temperatur des Wärmetauschers auf die optimale Konversions-Temperatur des Katalysators in Abhängigkeit vom Reduktionsmittel geregelt wird.5. Exhaust gas purification system according to claim 1, characterized in that the catalyst ( 1 ) via a metering system ( 6 ) at least one reducing agent can be fed, the temperature of the heat exchanger being regulated to the optimal conversion temperature of the catalyst depending on the reducing agent. 6. Abgasreinigungsanlage nach Anspruch 1, dadurch ge­ kennzeichnet, daß bei einer Diesel-Brennkraftmaschine der gewünschte Temperaturbereich entsprechend dem Einsatz des Reduktionsmittels einstellbar ist.6. Emission control system according to claim 1, characterized ge indicates that in a diesel engine the desired temperature range according to the use of the Reducing agent is adjustable.
DE4410022A 1994-03-23 1994-03-23 Exhaust gas cleaning system for IC engine Ceased DE4410022A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE4410022A DE4410022A1 (en) 1994-03-23 1994-03-23 Exhaust gas cleaning system for IC engine

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DE4410022A DE4410022A1 (en) 1994-03-23 1994-03-23 Exhaust gas cleaning system for IC engine

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DE4410022A1 true DE4410022A1 (en) 1995-10-05

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19522274A1 (en) * 1995-06-20 1997-01-02 Hermann Von Westernhagen Exhaust system e.g. for IC engine
FR2764638A1 (en) * 1997-06-16 1998-12-18 Inst Francais Du Petrole METHOD AND ARRANGEMENT FOR REMOVING NITROGEN OXIDES FROM EXHAUST GASES USING A HEAT EXCHANGER
WO2000034631A1 (en) * 1998-11-20 2000-06-15 Volvo Personvagnar Ab HEAT EXCHANGER FOR SOx- OR NOx- REGENERATION OF CATALYST
WO2000077354A1 (en) * 1999-06-15 2000-12-21 Emitec Gesellschaft Für Emissionstechnologie Mbh Exhaust system for an internal combustion engine in a motor vehicle
WO2001025603A1 (en) * 1999-10-07 2001-04-12 Volkswagen Aktiengesellschaft Motor vehicle with an internal combustion engine
EP1134367A2 (en) 2000-03-15 2001-09-19 Volkswagen Aktiengesellschaft Exhaust gas purification installation of an internal combustion engine with exhaust cooling and process for using the exhaust gas purification installation
EP1186757A2 (en) * 2000-09-05 2002-03-13 DaimlerChrysler AG Exhaust purification apparatus of an internal combustion engine with a cooling unit
WO2002029212A1 (en) * 2000-09-30 2002-04-11 Volkswagen Aktiengesellschaft Exhaust gas system of an internal combustion engine with a catalyst
DE10053674A1 (en) * 2000-10-28 2002-05-08 Volkswagen Ag Process for tempering and cooling an exhaust gas stream fed in an exhaust gas pipe from an IC engine to a catalyst comprises adjusting a deviated charged air partial stream, and operating the catalyst within the temperature region
FR2824594A1 (en) * 2001-05-08 2002-11-15 Volkswagen Ag METHOD AND APPARATUS FOR COOLING EXHAUST GASES
EP1327754A1 (en) * 2002-01-14 2003-07-16 J. Eberspächer GmbH & Co. KG Exhaust system with a heat exchanger for heat dissipation from exhaust gases
DE102004013557A1 (en) * 2004-03-19 2005-10-06 Audi Ag Combustion engine exhaust catalyser functional test unit has heat exchange in input exhaust flow allowing temperature control over entire operating range
DE10343468B4 (en) * 2003-09-19 2010-07-08 Audi Ag Exhaust gas cooler for an exhaust system of an internal combustion engine of a vehicle, in particular of a motor vehicle
DE102014222743A1 (en) 2014-11-06 2016-05-12 Continental Automotive Gmbh Pump unit for reducing agent of an emission control system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2222498B2 (en) * 1971-05-07 1978-03-30 Automobiles Peugeot, Paris Temperature control device for a catalytic reactor
DE4127634A1 (en) * 1991-08-21 1993-02-25 Bayerische Motoren Werke Ag Exhaust gas system for IC engine with catalytic converter - has tube conducting cooling air which forms suction pump at tail pipe

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2222498B2 (en) * 1971-05-07 1978-03-30 Automobiles Peugeot, Paris Temperature control device for a catalytic reactor
DE4127634A1 (en) * 1991-08-21 1993-02-25 Bayerische Motoren Werke Ag Exhaust gas system for IC engine with catalytic converter - has tube conducting cooling air which forms suction pump at tail pipe

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Effelsberg, E *
u.a.: "Untersuchungen zur Abgasnachbehandlung an Großdieselmotoren", In: MTU FOCUS 2/1993, S. 26-32 *

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19522274A1 (en) * 1995-06-20 1997-01-02 Hermann Von Westernhagen Exhaust system e.g. for IC engine
FR2764638A1 (en) * 1997-06-16 1998-12-18 Inst Francais Du Petrole METHOD AND ARRANGEMENT FOR REMOVING NITROGEN OXIDES FROM EXHAUST GASES USING A HEAT EXCHANGER
EP0886039A1 (en) * 1997-06-16 1998-12-23 Institut Francais Du Petrole Process and system for eliminating nitrogen oxides out of exhaust gases, using a heat exchanger
US6009703A (en) * 1997-06-16 2000-01-04 Institut Francais Du Petrole Process and assembly for eliminating nitrogen oxides present in exhaust gas, using a heat exchanger
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