DE19504208B4 - Exhaust gas converter with a catalyst and a burner connected upstream - Google Patents
Exhaust gas converter with a catalyst and a burner connected upstream Download PDFInfo
- Publication number
- DE19504208B4 DE19504208B4 DE19504208A DE19504208A DE19504208B4 DE 19504208 B4 DE19504208 B4 DE 19504208B4 DE 19504208 A DE19504208 A DE 19504208A DE 19504208 A DE19504208 A DE 19504208A DE 19504208 B4 DE19504208 B4 DE 19504208B4
- Authority
- DE
- Germany
- Prior art keywords
- exhaust gas
- catalyst
- burner
- exhaust
- exhaust pipe
- 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
-
- 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
- F01N3/26—Construction of thermal 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
- F01N3/08—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
- F01N3/2033—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using a fuel burner or introducing fuel into exhaust duct
-
- 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)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Abgaskonverter mit einem im Zuge einer Abgasleitung liegenden Katalysator, der eine katalytische Umwandlung unerwünschter Abgasbestandteile erst nach Erwärmung auf seine Betriebstemperatur vornimmt, und einem diesem vorgeschalteten, mit einem Brennerrohr in die Abgasleitung mündenden, mit Kraftstoff- und Luftzufuhr versehenen Brenner zur Beschleunigung der Erwärmung des Katalysators sowie zur Erzeugung einer weiteren Umwandlung unerwünschter Abgasbestandteile in der Abgasleitung vor dem Katalysator, dadurch gekennzeichnet, dass in die Abgasleitung (1) hineinragende Bereiche des Brenners (4) auf ihrer der Abgasströmung ausgesetzten Oberfläche eine Schicht (11) aus katalytisch aktivem Material tragen.exhaust gas converter with a lying in the course of an exhaust pipe catalyst, the a catalytic conversion of undesirable exhaust components only after warming to its operating temperature, and upstream of this, with a burner pipe in the exhaust pipe opening, with fuel and Air supply provided burner to accelerate the heating of the Catalyst and to generate a further conversion undesirable Exhaust gas components in the exhaust pipe upstream of the catalyst, thereby characterized in that in the exhaust pipe (1) projecting areas the burner (4) on its surface exposed to the exhaust gas flow one Wear layer (11) of catalytically active material.
Description
Die Erfindung betrifft einen Abgaskonverter gemäß dem Oberbegriff des Patentanspruchs.The The invention relates to an exhaust gas converter according to the preamble of the claim.
Bei
einem aus der
Der Erfindung liegt die Aufgabe zu Grunde, einen gattungsgemäßen Abgaskonverter zu schaffen, in dem die Ausnutzung des Wärmeinhalts der Brennergase mit minimalem zusätzlichen Aufwand optimiert ist.Of the Invention is based on the object, a generic exhaust gas converter to create in which the utilization of the heat content of the burner gases with minimal additional Effort is optimized.
Die erfindungsgemäße Lösung dieser Aufgabe besteht in den kennzeichnenden Merkmalen des Patentanspruchs.The inventive solution this Task consists in the characterizing features of the claim.
Während der zitierte Stand der Technik die Wärme der Brennergase – abgesehen für die Erwärmung des Katalysators – nur zur Erzielung einer thermischen Abgasreaktion heranzieht, sieht die Erfindung – ggf. zusätzlich zu einer derartigen thermischen Reaktion – eine Ausnutzung der Wärme der Brennergase zur Aufheizung einer dünnen Schicht katalytisch aktiven Materials im Wege des zuströmenden Abgases vor, so dass der Brenner gleichsam zu einem Vorkatalysator ergänzt ist. Bekanntlich werden aus einem relativ kleinen Vorkatalysator und einem relativ großen Hauptkatalysator bestehende Abgaskonverter verwendet, deren Vorkatalysator mit seiner kleinen Masse bei einem Kaltstart der die Abgase liefernden Brennkraftmaschine relativ schnell auf seine Arbeitstemperatur erwärmt wird; dadurch wird eine Zeitspanne überbrückt, die erforderlich ist, damit der relativ große Hauptkatalysator durch die Wärme der Abgase und die bei der katalytischen Reaktion am Vorkatalysator abgegebene Wärme auf seine Arbeitstemperatur gebracht wird.During the cited prior art heat the burner gas - apart for the warming of the catalyst - only sees to achieve a thermal exhaust reaction the invention - if necessary additionally to such a thermal reaction - an exploitation of the heat of the burner gases to heat a thin Layer of catalytically active material in the way of the incoming exhaust gas before, so that the burner is as it were supplemented to a pre-catalyst. As is known, from a relatively small precatalyst and a relatively large one Main catalyst used existing exhaust gas converter, its precatalyst with its small mass in a cold start of the exhaust gases Internal combustion engine is heated relatively quickly to its working temperature; This bridges a time span that is is required for the relatively large main catalyst by the heat of the Exhaust gases and in the catalytic reaction at the pre-catalyst released heat is brought to its working temperature.
Bei der Erfindung wird also ein derartiger, eine kleine Masse aufweisender Vorkatalysator gleichsam dadurch gewonnen, dass ein in die Abgasleitung hineinragender, verständlicherweise möglichst strömungswiderstandsarm gestalteter Bereich des Brenners, insbesondere des Brennerrohres, mit einer demgemäß durch den Wärmegehalt der Brennergase aufgeheizten Schicht aus an sich von üblichen Katalysatoren her bekanntem katalytisch aktiven Material versehen ist.at Thus, the invention will be such, a small mass exhibiting Pre-catalyst as it gained by one in the exhaust pipe protruding, understandably preferably strömungswiderstandsarm designed area of the burner, in particular the burner tube, with one accordingly the heat content the burner gas heated layer out of the usual Catalysts her known catalytically active material provided is.
Ein Ausführungsbeispiel der Erfindung wird im Folgenden anhand der Zeichnung erläutert, die einen Längsschnitt durch eine mit der Erfindung ausgerüstete Abgasanlage einer Kraftfahrzeug-Brennkraftmaschine wiedergibt.One embodiment The invention will be explained below with reference to the drawing, which a longitudinal section by an exhaust system of a motor vehicle internal combustion engine equipped with the invention reproduces.
Die
Abgasleitung
Dem
Katalysator
Bei
einem Kaltstart oder immer dann, wenn der Katalysator
In
der Abgasströmung
liegende Oberflächenbereiche
des Brenners
Eine
derartige Gewinnung eines Vorkatalysators hat den Vorteil, dass
nach dem Warmlauf der Brennkraftmaschine, also beim Vorliegen heißer Gase
und bei voll arbeitendem Katalysator
Mit der Erfindung ist demgemäß ein gattungsgemäßer Abgaskonverter mit optimaler Ausnutzung des Wärmeinhalts der Brennergase zur Umwandlung störender Abgasbestandteile geschaffen.With The invention accordingly is a generic exhaust gas converter with optimum utilization of the heat content created the burner gases for the conversion of interfering exhaust gas components.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19504208A DE19504208B4 (en) | 1994-02-11 | 1995-02-09 | Exhaust gas converter with a catalyst and a burner connected upstream |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEP4404376.7 | 1994-02-11 | ||
DE4404376 | 1994-02-11 | ||
DE19504208A DE19504208B4 (en) | 1994-02-11 | 1995-02-09 | Exhaust gas converter with a catalyst and a burner connected upstream |
Publications (2)
Publication Number | Publication Date |
---|---|
DE19504208A1 DE19504208A1 (en) | 1995-08-17 |
DE19504208B4 true DE19504208B4 (en) | 2005-09-29 |
Family
ID=6510045
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19504208A Expired - Fee Related DE19504208B4 (en) | 1994-02-11 | 1995-02-09 | Exhaust gas converter with a catalyst and a burner connected upstream |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE19504208B4 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010062755A1 (en) * | 2010-12-09 | 2012-06-14 | Bosch Emission Systems Gmbh & Co. Kg | Exhaust gas system for internal combustion engine of vehicle, has burner attached to fuel supply and to air supply, where burner has flame tube, which has open outlet end detachably ending in exhaust pipe |
Families Citing this family (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE506871C2 (en) * | 1997-02-10 | 1998-02-23 | Mats Tikka | Catalytic converter for two-stroke engine with heat exchanger |
DE19926150B4 (en) * | 1999-06-09 | 2007-10-11 | Volkswagen Ag | Device for reducing nitrogen oxides (NOx) in the exhaust gas of an internal combustion engine, in particular a diesel internal combustion engine |
DE10354232A1 (en) * | 2003-11-20 | 2005-06-30 | J. Eberspächer GmbH & Co. KG | Exhaust gas treatment system for an internal combustion engine, in particular a diesel internal combustion engine, and method for operating an exhaust gas treatment system for an internal combustion engine |
DE102020211089A1 (en) | 2020-09-02 | 2022-03-03 | Robert Bosch Gesellschaft mit beschränkter Haftung | Method for controlling a burner in an exhaust system of an internal combustion engine |
DE102020211113A1 (en) | 2020-09-03 | 2022-03-03 | Robert Bosch Gesellschaft mit beschränkter Haftung | Process for operating an exhaust gas burner both for heating the catalyst and as a parking heater |
DE102020214288A1 (en) | 2020-11-13 | 2022-05-19 | Robert Bosch Gesellschaft mit beschränkter Haftung | Method for operating an internal combustion engine |
DE102020215289A1 (en) | 2020-12-03 | 2022-06-09 | Robert Bosch Gesellschaft mit beschränkter Haftung | Process for operating an exhaust gas burner |
DE102021200331A1 (en) | 2021-01-15 | 2022-07-21 | Robert Bosch Gesellschaft mit beschränkter Haftung | Method for operating an exhaust gas catalytic converter |
DE102021203083A1 (en) | 2021-03-29 | 2022-09-29 | Robert Bosch Gesellschaft mit beschränkter Haftung | Method for operating an exhaust gas burner |
DE102021203678A1 (en) | 2021-04-14 | 2022-10-20 | Robert Bosch Gesellschaft mit beschränkter Haftung | Method and computing unit for operating an exhaust gas burner |
DE102021206332A1 (en) | 2021-06-21 | 2022-12-22 | Robert Bosch Gesellschaft mit beschränkter Haftung | Method for operating an exhaust system of an internal combustion engine |
US11821351B2 (en) | 2021-07-05 | 2023-11-21 | Robert Bosch Gmbh | Method for operating an exhaust gas burner during its start phase |
DE102021208258A1 (en) | 2021-07-29 | 2023-02-02 | Robert Bosch Gesellschaft mit beschränkter Haftung | Method, computing unit and computer program for determining the conversion capacity of an exhaust gas catalytic converter |
DE102021209417A1 (en) | 2021-08-27 | 2023-03-02 | Robert Bosch Gesellschaft mit beschränkter Haftung | Method, computing unit and computer program for determining an amount of air provided by means of an electric air pump in an exhaust system of an internal combustion engine |
DE102021209420A1 (en) | 2021-08-27 | 2023-03-02 | Robert Bosch Gesellschaft mit beschränkter Haftung | Method for operating an internal combustion engine with at least one catalytic converter |
DE102021211056A1 (en) | 2021-10-01 | 2023-04-06 | Robert Bosch Gesellschaft mit beschränkter Haftung | Method for operating an exhaust gas catalytic converter |
DE102021211880A1 (en) | 2021-10-21 | 2023-04-27 | Robert Bosch Gesellschaft mit beschränkter Haftung | Method for controlling a temperature of an exhaust system of an internal combustion engine |
DE102021212923A1 (en) | 2021-11-17 | 2023-05-17 | Robert Bosch Gesellschaft mit beschränkter Haftung | Method for heating an exhaust system |
DE102022201665A1 (en) | 2022-02-17 | 2023-08-17 | Robert Bosch Gesellschaft mit beschränkter Haftung | Process, computing unit and computer program for diagnosing the functionality of a burner |
DE102022201645A1 (en) | 2022-02-17 | 2023-08-17 | Robert Bosch Gesellschaft mit beschränkter Haftung | Method of operating a fuel-fired burner |
DE102022203965A1 (en) | 2022-04-25 | 2023-10-26 | Robert Bosch Gesellschaft mit beschränkter Haftung | Burner for an exhaust gas aftertreatment system, exhaust gas aftertreatment system for an internal combustion engine |
DE102022205806A1 (en) | 2022-06-08 | 2023-12-14 | Robert Bosch Gesellschaft mit beschränkter Haftung | Burner for an exhaust gas aftertreatment system, exhaust gas aftertreatment system for an internal combustion engine |
DE102022206647A1 (en) | 2022-06-30 | 2024-01-04 | Robert Bosch Gesellschaft mit beschränkter Haftung | Method for determining an air mass flow, method for operating a burner module, burner module for an exhaust gas aftertreatment system, exhaust gas aftertreatment system air mass determination of a burner with an absolute pressure sensor |
DE102022207733A1 (en) | 2022-07-27 | 2024-02-01 | Robert Bosch Gesellschaft mit beschränkter Haftung | Method for operating an exhaust system of an internal combustion engine, computing unit and computer program |
DE102022210185A1 (en) | 2022-09-27 | 2024-03-28 | Robert Bosch Gesellschaft mit beschränkter Haftung | Method, computing unit and computer program for optimal operation of an internal combustion engine and a burner of a motor vehicle |
DE102022211127A1 (en) | 2022-10-20 | 2024-04-25 | Robert Bosch Gesellschaft mit beschränkter Haftung | Method, computing unit and computer program for operating a burner |
DE102022211964A1 (en) | 2022-11-11 | 2024-05-16 | Robert Bosch Gesellschaft mit beschränkter Haftung | Method for operating an internal combustion engine |
DE102022212014A1 (en) | 2022-11-14 | 2024-05-16 | Robert Bosch Gesellschaft mit beschränkter Haftung | Burner unit in the exhaust tract of an internal combustion engine |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4208624A1 (en) * | 1992-03-18 | 1993-09-23 | Bayerische Motoren Werke Ag | Vehicle exhaust gas cleaning system |
-
1995
- 1995-02-09 DE DE19504208A patent/DE19504208B4/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4208624A1 (en) * | 1992-03-18 | 1993-09-23 | Bayerische Motoren Werke Ag | Vehicle exhaust gas cleaning system |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010062755A1 (en) * | 2010-12-09 | 2012-06-14 | Bosch Emission Systems Gmbh & Co. Kg | Exhaust gas system for internal combustion engine of vehicle, has burner attached to fuel supply and to air supply, where burner has flame tube, which has open outlet end detachably ending in exhaust pipe |
DE102010062755B4 (en) * | 2010-12-09 | 2015-05-28 | Bosch Emission Systems Gmbh & Co. Kg | exhaust system |
Also Published As
Publication number | Publication date |
---|---|
DE19504208A1 (en) | 1995-08-17 |
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Legal Events
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8110 | Request for examination paragraph 44 | ||
8320 | Willingness to grant licences declared (paragraph 23) | ||
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |