WO2008135016A1 - Exhaust gas duct and fuel cell system - Google Patents
Exhaust gas duct and fuel cell system Download PDFInfo
- Publication number
- WO2008135016A1 WO2008135016A1 PCT/DE2008/000721 DE2008000721W WO2008135016A1 WO 2008135016 A1 WO2008135016 A1 WO 2008135016A1 DE 2008000721 W DE2008000721 W DE 2008000721W WO 2008135016 A1 WO2008135016 A1 WO 2008135016A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- line
- exhaust gas
- main exhaust
- branch
- lambda probe
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/0444—Concentration; Density
- H01M8/0447—Concentration; Density of cathode exhausts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
-
- 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
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
- F01N2560/025—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting O2, e.g. lambda sensors
-
- 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
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/20—Sensor having heating means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
- H01M8/04037—Electrical heating
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Definitions
- the invention relates to an exhaust system and a fuel cell system.
- the handling of exhaust gases plays a major role in many technical fields.
- the exhaust gas composition especially the oxygen content in the exhaust gas, is measured. This information is useful in terms of pollutant emissions and the control of the upstream of the exhaust system.
- the invention consists in an exhaust system with a main exhaust gas line, a branching off from the main exhaust branch first branch line and a branch of the main exhaust gas branch second branch line, both lead to a arranged outside the main exhaust line lambda probe, wherein, based on the flow direction of the exhaust gas the main exhaust branch, the first branch line branches off from the main exhaust branch upstream of the second branch line. In this way, a forced flow of the combustion exhaust gas to the outside of the
- Main exhaust gas arranged arranged lambda probe, whereby the area around the lambda probe and the lambda probe are no longer influenced in an excessive manner by the temperature of the exhaust gases.
- the lambda probe can be positioned in this way in almost any location.
- the arrangement of the branch lines at different flow coordinates of the main exhaust line corresponds to the arrangement of a Prandtl pitot tube, that is, a fluidic measuring instrument for determining a back pressure.
- the lambda probe is assigned a heating device. The heater brings the lambda probe to operating temperature. This is generally higher than the temperature of the exhaust gas, which is passed via the branch line to the lambda probe. Consequently, the exhaust gas can cause no increase in temperature of the lambda probe and thus no distortion of the measurement results due to temperature effects.
- branch lines lead to a measuring volume which is delimited by a housing receiving the lambda probe.
- the branch lines can be separable from the housing components or also formed integrally with the housing.
- branch lines are directly connected to each other and record the lambda probe.
- the branch lines then represent a uniform tube, which simultaneously provides the measurement volume for the lambda probe.
- the invention further relates to a fuel cell system with an exhaust system according to the invention.
- the monitoring of the exhaust gas values is particularly useful, and because of the short pathways in a compact system, it is particularly advantageous if measures are available which avoid influencing the lambda measurement by the temperature of the exhaust gases.
- Figure 1 is a schematic representation of an inventive exhaust system.
- a fuel cell system 24 is shown with an adjoining main exhaust line 10. This is supplied, in particular, with exhaust gas 26 from an afterburner arranged in the fuel cell system 24. Exhaust gases can also be introduced directly into the main exhaust line 10 from other components of the fuel cell system 24 From the main exhaust line 10 branches off a first branch line 12, which is arranged upstream of a second branch line 14 also branching off from the main exhaust line 10.
- the branch lines 12, 14 lead to a measuring volume 20 in which a lambda probe 16 equipped with a heating device 18.
- the measuring volume is bounded by a housing 22.
- the heating device 18 is heated via an electrical line 28, and the lambda probe 16 is connected to an electrical measuring line 30 Heating line 28 and the measuring line 30 to an electronic control unit 32 which is associated with the fuel cell system 24 and controls various functions of the fuel cell system 24 on the basis of inputs and measurement data or regulates.
- an electronic control unit 32 which is associated with the fuel cell system 24 and controls various functions of the fuel cell system 24 on the basis of inputs and measurement data or regulates.
- the lambda probe is arranged directly in the main exhaust line
- it is provided in the context of the present invention to position the lambda probe in a measurement volume 20 is arranged outside of the main exhaust pipe 10. Between the branch points of the branch lines 12, 14 in the main exhaust line 10 is a pressure difference.
- This pressure difference ensures that an exhaust gas portion 34 is supplied to the measurement volume 20, wherein this portion cools on the way to the measurement volume 20 to a temperature which is not higher than the temperature impressed by the heater 18 of the lambda probe 16. Consequently, the partial exhaust gas stream 34 does not lead to an increase in temperature of the lambda probe 16, so that there is no falsification of the measurement voltage supplied by the lambda probe 16 to the electronic control unit 32.
- first branch line 14 second branch line
- control unit 34 partial exhaust gas flow
Abstract
The invention relates to an exhaust gas duct comprising a main exhaust gas line (10), a first branch line (12) branching off the main exhaust gas line, and a second branch line (14) branching off the main exhaust gas line, both leading to a lambda sensor (16) located outside the main exhaust gas line, wherein, relative to the flow direction of the exhaust gas through the main exhaust gas line, the first branch line (12) branches off the main exhaust gas line (10) upstream of the second branch line (14). The invention further relates to a fuel cell system.
Description
Abgasführung und BrennstoffzellensystemExhaust system and fuel cell system
Die Erfindung betrifft eine Abgasführung und ein Brennstoffzellensystem.The invention relates to an exhaust system and a fuel cell system.
Die Handhabung von Abgasen spielt in vielen technischen Gebieten eine große Rolle. Insbesondere wird vielfach die Ab- gasZusammensetzung, speziell der Sauerstoffgehalt im Abgas, gemessen. Diese Information ist im Hinblick auf die Schadstoffemission und die Steuerung beziehungsweise Regelung der dem Abgasstrang vorgeordneten Systeme nützlich.The handling of exhaust gases plays a major role in many technical fields. In particular, in many cases the exhaust gas composition, especially the oxygen content in the exhaust gas, is measured. This information is useful in terms of pollutant emissions and the control of the upstream of the exhaust system.
Allerdings begegnet man bei der Sauerstoffmessung mit der Lambdasonde Problemen, da die Sondenspannung von verschiedenen Parametern abhängt, die sich als Störgrößen erweisen können. Dabei ist insbesondere die Temperatur im Bereich der Lambdasonde kritisch, da diese direkt linear in den ge- messenen Spannungswert eingeht. Dies ist ein geringes Problem bei Systemen, die eine nahezu konstante beziehungsweise relativ niedrige Abgastemperatur liefern. Schwankt die Abgastemperatur jedoch beträchtlich und insbesondere bis auf hohe Werte, so wird das Ergebnis der Lambdamessung in nicht mehr hinnehmbarer Weise verfälscht. Eine große Schwankungsbreite bei der Abgastemperatur und hohe Temperaturen des Abgases können insbesondere dann auftreten, wenn die Abgas- führung vergleichsweise kurz ist, so dass die Lambdasonde relativ nah an der Wärmequelle im System angeordnet ist. Dies ist insbesondere bei kompakt bauenden Brennstoffzel- lensystemen der Fall, wo nur ein vergleichsweise kurzer Abgasstrang vorliegt, der im Allgemeinen an einen exotherm arbeitenden Nachbrenner anschließt.
Der Erfindung liegt die Aufgabe zugrunde, die Verfälschung der Lambdamessung aufgrund von Temperatureffekten zu vermeiden.However, oxygen measurement using the lambda probe encounters problems because the probe voltage depends on various parameters that can prove to be disturbances. In particular, the temperature in the area of the lambda probe is critical, since it assumes a linear direct response to the measured voltage value. This is a minor problem in systems that provide near constant or relatively low exhaust gas temperatures. However, if the exhaust gas temperature fluctuates considerably and in particular up to high values, then the result of the lambda measurement is unacceptably falsified. A large fluctuation range in the exhaust gas temperature and high temperatures of the exhaust gas can occur in particular when the exhaust gas guide is comparatively short, so that the lambda probe is arranged relatively close to the heat source in the system. This is the case in particular in the case of compact fuel cell systems where only a comparatively short exhaust gas line is present, which generally follows an exothermic afterburner. The invention has for its object to avoid the falsification of the Lambdamessung due to temperature effects.
Diese Aufgabe wird mit den Merkmalen der unabhängigen Ansprüche gelöst.This object is achieved with the features of the independent claims.
Vorteilhafte Ausführungsformen der Erfindung sind in den abhängigen Ansprüchen angegeben.Advantageous embodiments of the invention are indicated in the dependent claims.
Die Erfindung besteht in einer Abgasführung mit einem Hauptabgassträng, einer von dem Hauptabgasstrang abzweigenden ersten Abzweigleitung und einer von dem Hauptabgas- sträng abzweigenden zweiten Abzweigleitung, die beide zu einer außerhalb des Hauptabgasstrang angeordneten Lambda- sonde führen, wobei, bezogen auf die Strömungsrichtung des Abgases durch den Hauptabgasstrang, die erste Abzweigleitung stromaufwärts der zweiten Abzweigleitung von dem Hauptabgasstrang abzweigt. Auf diese Weise wird eine ZwangsStrömung des Verbrennungsabgases zu der außerhalb desThe invention consists in an exhaust system with a main exhaust gas line, a branching off from the main exhaust branch first branch line and a branch of the main exhaust gas branch second branch line, both lead to a arranged outside the main exhaust line lambda probe, wherein, based on the flow direction of the exhaust gas the main exhaust branch, the first branch line branches off from the main exhaust branch upstream of the second branch line. In this way, a forced flow of the combustion exhaust gas to the outside of the
HauptabgasStrangs angeordneten Lambdasonde erzeugt, wobei der Bereich um die Lambdasonde und die Lambdasonde selbst dann nicht mehr in übermäßiger Weise durch die Temperatur der Abgase beeinflusst werden. Die Lambdasonde kann auf diese Weise an nahezu beliebigen Orten positioniert werden. Die Anordnung der Abzweigleitungen an verschiedenen Strömungskoordinaten des Hauptabgasstrangs entspricht der Anordnung eines Prandtlschen Staurohrs, das heißt eines strömungstechnischen Messinstrumentes zur Bestimmung eines Staudruckes.
Nützlicherweise ist vorgesehen, dass der Lambdasonde eine Heizeinrichtung zugeordnet ist. Die Heizeinrichtung bringt die Lambdasonde auf Betriebstemperatur. Diese liegt im Allgemeinen höher als die Temperatur des Abgases, welches über die Abzweigleitung zur Lambdasonde geleitet wird. Folglich kann das Abgas keine Temperaturerhöhung der Lambdasonde und somit keine Verfälschung der Messergebnisse aufgrund von Temperatureffekten mehr bewirken.Main exhaust gas arranged arranged lambda probe, whereby the area around the lambda probe and the lambda probe are no longer influenced in an excessive manner by the temperature of the exhaust gases. The lambda probe can be positioned in this way in almost any location. The arrangement of the branch lines at different flow coordinates of the main exhaust line corresponds to the arrangement of a Prandtl pitot tube, that is, a fluidic measuring instrument for determining a back pressure. Usefully, it is provided that the lambda probe is assigned a heating device. The heater brings the lambda probe to operating temperature. This is generally higher than the temperature of the exhaust gas, which is passed via the branch line to the lambda probe. Consequently, the exhaust gas can cause no increase in temperature of the lambda probe and thus no distortion of the measurement results due to temperature effects.
Es kann vorgesehen sein, dass die Abzweigleitungen zu einem Messvolumen führen, das durch ein die Lambdasonde aufnehmendes Gehäuse begrenzt ist. Die Abzweigleitungen können dabei von dem Gehäuse trennbare Bauteile sein oder auch einstückig mit dem Gehäuse ausgebildet vorliegen.It can be provided that the branch lines lead to a measuring volume which is delimited by a housing receiving the lambda probe. The branch lines can be separable from the housing components or also formed integrally with the housing.
Ebenfalls ist es möglich, dass die Abzweigleitungen direkt miteinander verbunden sind und die Lambdasonde aufnehmen. Die Abzweigleitungen stellen dann ein einheitliches Rohr dar, das gleichzeitig das Messvolumen für die Lambdasonde zur Verfügung stellt.It is also possible that the branch lines are directly connected to each other and record the lambda probe. The branch lines then represent a uniform tube, which simultaneously provides the measurement volume for the lambda probe.
Die Erfindung betrifft weiterhin ein BrennstoffZeilensystem mit einer erfindungsgemäßen Abgasführung. Bei Brennstoff- Zeilensystemen ist die Überwachung der Abgaswerte besonders nützlich, und aufgrund der kurzen Wege bei kompakten System ist es vom besonderen Vorteil, wenn Maßnahmen zur Verfügung stehen, die eine Beeinflussung der Lambdamessung durch die Temperatur der Abgase vermeiden.The invention further relates to a fuel cell system with an exhaust system according to the invention. In fuel-line systems, the monitoring of the exhaust gas values is particularly useful, and because of the short pathways in a compact system, it is particularly advantageous if measures are available which avoid influencing the lambda measurement by the temperature of the exhaust gases.
Die Erfindung wird nun mit Bezug auf die begleitende Zeichnung anhand einer bevorzugten Ausführungsform beispielhaft erläutert.
Es zeigt :The invention will now be described by way of example with reference to the accompanying drawing with reference to a preferred embodiment. It shows :
Figur 1 eine schematische Darstellung einer erfindungsge- mäßen Abgasführung.Figure 1 is a schematic representation of an inventive exhaust system.
Es ist ein Brennstoffzellensystem 24 mit" einem daran anschließenden Hauptabgasstrang 10 dargestellt. Dieser wird insbesondere von einem in dem Brennstoffzellensystem 24 an- geordneten Nachbrenner mit Abgas 26 beliefert. Abgase können auch von anderen Komponenten des Brennstoffzellensys- tems 24 direkt in den Hauptabgasstrang 10 eingebracht werden, beispielsweise von einem Reformer oder von einem Brennstoffzellenstapel . Von dem Hauptabgassträng 10 zweigt eine erste Abzweigleitung 12 ab, die stromaufwärts von einer ebenfalls von dem Hauptabgassträng 10 abzweigenden zweiten Abzweigleitung 14 angeordnet ist. Die Abzweigleitungen 12, 14 führen zu einem Messvolumen 20, in dem eine mit einer Heizeinrichtung 18 ausgestatte Lambdasonde 16 an- geordnet ist. Das Messvolumen wird von einem Gehäuse 22 begrenzt. Die Heizeinrichtung 18 wird über eine elektrische Leitung 28 beheizt, und die Lambdasonde 16 steht mit einer elektrischen Messleitung 30 in Verbindung. Nützlicherweise führen die Heizleitung 28 und die Messleitung 30 zu einer elektronischen Steuereinheit 32, die dem Brennstoffzellensystem 24 zugeordnet ist und verschiedene Funktionen des Brennstoffzellensystems 24 auf der Grundlage von Eingaben und Messdaten steuert beziehungsweise regelt. Im Gegensatz zu herkömmlichen Systemen, bei denen die Lambdasonde direkt im Hauptabgasstrang angeordnet ist, ist im Rahmen der vorliegenden Erfindung vorgesehen, die Lambdasonde in einem Messvolumen 20 zu positionieren, wobei dieses Messvolumen
außerhalb des HauptabgasStrangs 10 angeordnet ist. Zwischen den Abzweigstellen der Abzweigleitungen 12, 14 im Hauptabgasstrang 10 liegt eine Druckdifferenz vor. Diese Druckdifferenz sorgt dafür, dass ein Abgasanteil 34 dem Messvolumen 20 zugeführt wird, wobei sich dieser Anteil auf dem Weg zum Messvolumen 20 auf eine Temperatur abkühlt, die nicht höher ist, als die durch die Heizeinrichtung 18 der Lambdasonde 16 aufgeprägte Temperatur. Folglich führt der Teilabgasstrom 34 nicht zu einer Temperaturerhöhung der Lambdasonde 16, so dass es auch nicht zu einer Verfälschung der von der Lambdasonde 16 an die elektronische Steuereinheit 32 gelieferten Messspannung kommt.A fuel cell system 24 is shown with an adjoining main exhaust line 10. This is supplied, in particular, with exhaust gas 26 from an afterburner arranged in the fuel cell system 24. Exhaust gases can also be introduced directly into the main exhaust line 10 from other components of the fuel cell system 24 From the main exhaust line 10 branches off a first branch line 12, which is arranged upstream of a second branch line 14 also branching off from the main exhaust line 10. The branch lines 12, 14 lead to a measuring volume 20 in which a lambda probe 16 equipped with a heating device 18. The measuring volume is bounded by a housing 22. The heating device 18 is heated via an electrical line 28, and the lambda probe 16 is connected to an electrical measuring line 30 Heating line 28 and the measuring line 30 to an electronic control unit 32 which is associated with the fuel cell system 24 and controls various functions of the fuel cell system 24 on the basis of inputs and measurement data or regulates. In contrast to conventional systems in which the lambda probe is arranged directly in the main exhaust line, it is provided in the context of the present invention to position the lambda probe in a measurement volume 20, this measurement volume is arranged outside of the main exhaust pipe 10. Between the branch points of the branch lines 12, 14 in the main exhaust line 10 is a pressure difference. This pressure difference ensures that an exhaust gas portion 34 is supplied to the measurement volume 20, wherein this portion cools on the way to the measurement volume 20 to a temperature which is not higher than the temperature impressed by the heater 18 of the lambda probe 16. Consequently, the partial exhaust gas stream 34 does not lead to an increase in temperature of the lambda probe 16, so that there is no falsification of the measurement voltage supplied by the lambda probe 16 to the electronic control unit 32.
Die in der vorstehenden Beschreibung, in den Zeichnungen sowie in den Ansprüchen offenbarten Merkmale der Erfindung können sowohl einzeln als auch in beliebiger Kombination für die Verwirklichung der Erfindung wesentlich sein.
The features of the invention disclosed in the foregoing description, in the drawings and in the claims may be essential to the realization of the invention both individually and in any combination.
Bezugszeichenliste :List of reference numbers:
10 HauptabgasStrang10 main exhaust gas flow
12 erste Abzweigleitung 14 zweite Abzweigleitung12 first branch line 14 second branch line
16 Lambdasonde16 lambda probe
18 Heizeinrichtung18 heating device
20 Messvolumen20 measuring volumes
22 Gehäuse 24 BrennstoffZeilensystem22 housing 24 fuel cell system
26 Abgas 28 Leitung26 Exhaust 28 line
30 Leitung30 line
32 Steuereinheit 34 Teilabgasstrom
32 control unit 34 partial exhaust gas flow
Claims
1. Abgasführung mit einem Hauptabgasstrang (10), einer von dem Hauptabgasstrang abzweigenden ersten Abzweigleitung (12) und einer von dem Hauptabgasstrang abzweigenden zweiten Abzweigleitung (14), die beide zu einer außerhalb des Hauptabgassträng angeordneten Lambdasonde (16) führen, wo- bei, bezogen auf die Strömungsrichtung des Abgases durch den Hauptabgasstrang, die erste Abzweigleitung (12) stromaufwärts der zweiten Abzweigleitung (14) von dem Hauptabgasstrang (10) abzweigt.An exhaust system comprising a main exhaust line (10), a first branch line (12) branching off from the main exhaust line and a second branch line (14) branching off from the main exhaust line, both leading to a lambda probe (16) arranged outside the main exhaust line, wherein With respect to the flow direction of the exhaust gas through the main exhaust line, the first branch line (12) branches off from the main exhaust line (10) upstream of the second branch line (14).
2. Abgasführung nach Anspruch 1, dadurch gekennzeichnet, dass der Lambdasonde (16) eine Heizeinrichtung (18) zugeordnet ist.2. Exhaust system according to claim 1, characterized in that the lambda probe (16) is associated with a heating device (18).
3. Abgasführung nach Anspruch 1 oder 2, dadurch gekenn- zeichnet, dass die Abzweigleitungen (12, 14) zu einem Messvolumen (20) führen, das durch ein die Lambdasonde (16) aufnehmendes Gehäuse (22) begrenzt ist.3. The exhaust system according to claim 1 or 2, characterized in that the branch lines (12, 14) lead to a measuring volume (20) which is bounded by a lambda probe (16) receiving the housing (22).
4. Abgasführung nach Anspruch 1 oder 2, dadurch gekenn- zeichnet, dass die Abzweigleitungen direkt miteinander verbunden sind und die Lambdasonde aufnehmen.4. exhaust system according to claim 1 or 2, characterized in that the branch lines are directly connected to each other and record the lambda probe.
5. BrennstoffZeilensystem mit einer Abgasführung nach einem der vorhergehenden Ansprüche . 5. fuel line system with an exhaust system according to one of the preceding claims.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102007020561A DE102007020561A1 (en) | 2007-05-02 | 2007-05-02 | Exhaust system and fuel cell system |
| DE102007020561.0 | 2007-05-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2008135016A1 true WO2008135016A1 (en) | 2008-11-13 |
Family
ID=39758815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE2008/000721 WO2008135016A1 (en) | 2007-05-02 | 2008-04-28 | Exhaust gas duct and fuel cell system |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE102007020561A1 (en) |
| WO (1) | WO2008135016A1 (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3614535A1 (en) * | 1986-04-29 | 1987-11-05 | Comuna Metall Vorrichtungs U M | Internal combustion engine with exhaust emission control |
| US4943493A (en) * | 1989-04-21 | 1990-07-24 | International Fuel Cells Corporation | Fuel cell power plant |
| EP0478644A1 (en) * | 1989-06-20 | 1992-04-08 | Emitec Emissionstechnologie | Process and device for generating heat through the flameless burning of a fuel in a gas current. |
| AT1571U1 (en) * | 1996-09-13 | 1997-07-25 | Avl Verbrennungskraft Messtech | ARRANGEMENT FOR SAMPLING |
| EP0908721A1 (en) * | 1997-10-10 | 1999-04-14 | Heraeus Electro-Nite International N.V. | Method of determining exhaust gas temperature and the air/fuel ratio lambda and sensor arrangement for carrying out the method |
| US6779339B1 (en) * | 2003-05-02 | 2004-08-24 | The United States Of America As Represented By The Environmental Protection Agency | Method for NOx adsorber desulfation in a multi-path exhaust system |
| JP2005034835A (en) * | 2003-06-23 | 2005-02-10 | Hitachi Ltd | Catalyst structure and fuel cell equipped with catalyst |
| DE102005051358A1 (en) * | 2005-10-25 | 2007-04-26 | Volkswagen Ag | Exhaust gas mass determining method for use in e.g. diesel engine, involves determining mass of exhaust gas in channel, from ratio of mass of pumped oxygen to difference of lambda values in channel before and after oxygen pumping |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004016568A1 (en) * | 2004-03-31 | 2005-10-27 | J. Dittrich Elektronic Gmbh & Co. Kg | Detecting residual gas in fuel gases for fuel cell, especially to detect oxygen as potential cause of explosion, using pump probe and fuel gas circuit with inlet for external atmosphere |
| DE102004017883B4 (en) * | 2004-04-13 | 2006-12-21 | Audi Ag | Exhaust system for an internal combustion engine of a vehicle, in particular of a motor vehicle |
-
2007
- 2007-05-02 DE DE102007020561A patent/DE102007020561A1/en not_active Withdrawn
-
2008
- 2008-04-28 WO PCT/DE2008/000721 patent/WO2008135016A1/en active Application Filing
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3614535A1 (en) * | 1986-04-29 | 1987-11-05 | Comuna Metall Vorrichtungs U M | Internal combustion engine with exhaust emission control |
| US4943493A (en) * | 1989-04-21 | 1990-07-24 | International Fuel Cells Corporation | Fuel cell power plant |
| EP0478644A1 (en) * | 1989-06-20 | 1992-04-08 | Emitec Emissionstechnologie | Process and device for generating heat through the flameless burning of a fuel in a gas current. |
| AT1571U1 (en) * | 1996-09-13 | 1997-07-25 | Avl Verbrennungskraft Messtech | ARRANGEMENT FOR SAMPLING |
| EP0908721A1 (en) * | 1997-10-10 | 1999-04-14 | Heraeus Electro-Nite International N.V. | Method of determining exhaust gas temperature and the air/fuel ratio lambda and sensor arrangement for carrying out the method |
| US6779339B1 (en) * | 2003-05-02 | 2004-08-24 | The United States Of America As Represented By The Environmental Protection Agency | Method for NOx adsorber desulfation in a multi-path exhaust system |
| JP2005034835A (en) * | 2003-06-23 | 2005-02-10 | Hitachi Ltd | Catalyst structure and fuel cell equipped with catalyst |
| DE102005051358A1 (en) * | 2005-10-25 | 2007-04-26 | Volkswagen Ag | Exhaust gas mass determining method for use in e.g. diesel engine, involves determining mass of exhaust gas in channel, from ratio of mass of pumped oxygen to difference of lambda values in channel before and after oxygen pumping |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102007020561A1 (en) | 2008-11-06 |
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