DE102010007072A1 - Method for operating internal combustion engine with exhaust gas passage, involves arranging catalyst in exhaust gas passage, where secondary air pump conveys secondary air mass flow upstream catalyst in exhaust gas passage - Google Patents
Method for operating internal combustion engine with exhaust gas passage, involves arranging catalyst in exhaust gas passage, where secondary air pump conveys secondary air mass flow upstream catalyst in exhaust gas passage Download PDFInfo
- Publication number
- DE102010007072A1 DE102010007072A1 DE102010007072A DE102010007072A DE102010007072A1 DE 102010007072 A1 DE102010007072 A1 DE 102010007072A1 DE 102010007072 A DE102010007072 A DE 102010007072A DE 102010007072 A DE102010007072 A DE 102010007072A DE 102010007072 A1 DE102010007072 A1 DE 102010007072A1
- Authority
- DE
- Germany
- Prior art keywords
- exhaust gas
- secondary air
- gas passage
- predetermined location
- exhaust
- 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
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Classifications
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- 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
- F01N9/00—Electrical control of exhaust gas treating apparatus
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- 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
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- 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
- F01N3/30—Arrangements for supply of additional air
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- 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
- F01N3/30—Arrangements for supply of additional air
- F01N3/32—Arrangements for supply of additional air using air pump
- F01N3/323—Electrically driven air pumps
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- 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
- F02B37/12—Control of the pumps
- F02B37/16—Control of the pumps by bypassing charging air
- F02B37/162—Control of the pumps by bypassing charging air by bypassing, e.g. partially, intake air from pump inlet to pump outlet
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0002—Controlling intake air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
- F02D41/024—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus
- F02D41/0255—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus to accelerate the warming-up of the exhaust gas treating apparatus at engine start
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- 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
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- 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)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zum Betreiben einer Brennkraftmaschine mit einem Abgastrakt, in dem wenigstens ein Katalysator angeordnet ist, und mit einer Sekundärluftpumpe, welche einen Sekundärluftmassenstrom stromauf des Katalysators in den Abgastrakt fördert, wobei zum Ändern des Sekundärluftmassenstromes eine der Sekundärluftpumpe zugeführte Versorgungsspannung verändert wird, gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a method for operating an internal combustion engine having an exhaust gas tract, in which at least one catalytic converter is arranged, and having a secondary air pump, which conveys a secondary air mass flow upstream of the catalytic converter into the exhaust gas tract, wherein a secondary air pump supply voltage is changed to change the secondary air mass flow, according to the preamble of claim 1.
Bei Verbrennungskraftmaschinen muss zur Erfüllung von Abgasgrenzwerten zum Aufheizen des Katalysators Sekundärluft in den Abgastrakt eingeleitet werden. Um im Abgastrakt optimale Reaktionsbedingungen und damit möglichst geringe Emissionen zu erreichen, muss die Sekundärluft möglichst genau zugemessen werden.In internal combustion engines secondary air must be introduced into the exhaust tract to meet exhaust limits for heating the catalyst. In order to achieve optimum reaction conditions in the exhaust tract and thus the lowest possible emissions, the secondary air must be as accurately as possible.
Aus der
Aus der
Ein gattungsgemäßes Verfahren ist aus der
Aus der
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren der o. g. Art derart zu verbessern, dass die Bereitstellung und Zumessung der benötigten Sekundärluftmasse verbessert ist.The invention is based on the object, a method of o. G. To improve the type such that the provision and metering of the required secondary air mass is improved.
Diese Aufgabe wird erfindungsgemäß durch ein Verfahren der o. g. Art mit den in Anspruch 1 gekennzeichneten Merkmalen gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind in den weiteren Ansprüchen beschrieben.This object is achieved by a method of o. G. Art solved with the features characterized in claim 1. Advantageous embodiments of the invention are described in the further claims.
Dazu ist es bei einem Verfahren der o. g. Art erfindungsgemäß vorgesehen, dass während einer Betriebsphase der Brennkraftmaschine, bei der der Katalysator aufgeheizt wird, die Versorgungsspannung in Abhängigkeit von einer Gemischzusammensetzung an einer vorbestimmten Stelle im Abgastrakt derart verändert wird, dass ein vorbestimmter Sollwert für die Gemischzusammensetzung stromab der Einleitstelle für Sekundärluft im Abgastrakt erzielt wird.This is in a method of o. G. Art according to the invention provided that, during an operating phase of the internal combustion engine in which the catalyst is heated, the supply voltage is changed depending on a mixture composition at a predetermined location in the exhaust system such that a predetermined setpoint for the mixture composition downstream of the discharge point for secondary air in the exhaust system achieved becomes.
Dies hat den Vorteil, dass eine optimierte Katalysator-Heizstrategie erzielt wird. Dies ermöglicht eine Adaption an Serienstreuungen am Abgasturbolader hinsichtlich des Abgasgegendruckes sowie eine Anpassung der Abgastemperatur derart, dass die Brennkraftmaschine immer in einem Katalysator-Heizfenster betrieben wird. Weiterhin wird eine Adaption an typischerweise auftretende Versottung in beteiligten Rohrleitungen erzielt.This has the advantage that an optimized catalyst heating strategy is achieved. This allows an adaptation to series variations on the exhaust gas turbocharger with regard to the exhaust gas back pressure and an adjustment of the exhaust gas temperature such that the internal combustion engine is always operated in a catalyst heating window. Furthermore, adaptation to typically occurring sooting in involved pipelines is achieved.
Um Bauteiltoleranzen und Alterungseffekte des Sekundärluftsystems auszugleichen, wird die Versorgungsspannung zusätzlich in Abhängigkeit von einem Istwert-Signal einer Lambdasonde derart verändert, dass ein vorbestimmtes Sollwert-Signal dieser Lambdasonde erzielt wird. In order to compensate for component tolerances and aging effects of the secondary air system, the supply voltage is additionally changed in dependence on an actual value signal of a lambda probe in such a way that a predetermined nominal value signal of this lambda probe is achieved.
Einen einfachen Eingriff in die Versorgungsspannung erzielt man dadurch, dass die Versorgungsspannung mit einem separaten Spannungsregler oder einem DC/DC-Wandler verändert wird.A simple intervention in the supply voltage is achieved by changing the supply voltage with a separate voltage regulator or a DC / DC converter.
Eine weitere Verbesserung der Genauigkeit der zugeführten Sekundärluftmenge erzielt man dadurch, dass die Versorgungsspannung zusätzlich in Abhängigkeit von einem Istwert eines Abgasgegendruckes an einer ersten vorbestimmten Stelle im Abgastrakt und/oder in Abhängigkeit von einem Istwert einer Abgastemperatur an einer zweiten vorbestimmten Stelle im Abgastrakt derart verändert wird, dass ein vorbestimmter Sollwert für den Abgasgegendruck an einer dritten vorbestimmten Stelle und/oder ein vorbestimmter Sollwert für die Abgastemperatur an einer vierten vorbestimmen Stelle erzielt wird.A further improvement in the accuracy of the supplied secondary air quantity is achieved by additionally changing the supply voltage as a function of an actual value of an exhaust backpressure at a first predetermined location in the exhaust tract and / or as a function of an actual value of an exhaust gas temperature at a second predetermined location in the exhaust tract in that a predetermined setpoint value for the exhaust backpressure at a third predetermined location and / or a predetermined setpoint value for the exhaust gas temperature at a fourth predetermined location are obtained.
Eine besonders einfache Regelung erzielt man dadurch, dass die erste vorbestimmte Stelle und die dritte vorbestimmte Stelle bzw. die zweite vorbestimmte Stelle und die vierte vorbestimmte Stelle identisch sind.A particularly simple regulation is achieved in that the first predetermined location and the third predetermined location or the second predetermined location and the fourth predetermined location are identical.
Die Erfindung wird im Folgenden anhand der Zeichnung näher erläutert. Diese zeigt inThe invention will be explained in more detail below with reference to the drawing. This shows in
Die in
Eine Sekundärluftanlage
Die Sekundärluftpumpe
In
Die Versorgungsspannung wird in Abhängigkeit von der Abgaszusammensetzung, der Abgastemperatur und/oder dem Abgasgegenruck verändert, um entsprechende gewünschte Sollwerte für Abgaszusammensetzung, Abgastemperatur und/oder Abgasgegenruck zu erzielen. Optional wird die Versorgungsspannung in Abhängigkeit von einem Zeitverlauf, einem Motorbetriebspunkt und/oder einem Signal einer Lambdasonde variiert.The supply voltage is varied as a function of the exhaust gas composition, the exhaust gas temperature and / or the exhaust gas back pressure in order to achieve corresponding desired setpoint values for exhaust gas composition, exhaust gas temperature and / or exhaust back pressure. Optionally, the supply voltage is varied as a function of a time characteristic, an engine operating point and / or a signal of a lambda probe.
Über das Lambdasondensignal können weiterhin Bauteil- und Alterungstoleranzen vom Sekundärluftsystem
Beispielsweise wird mittels einer Breitbandlambdasonde vor dem oder den Abgaskonvertern (Katalysator
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- DE 10205966 A1 [0003] DE 10205966 A1 [0003]
- DE 10338935 A1 [0004] DE 10338935 A1 [0004]
- DE 102004041457 A1 [0005] DE 102004041457 A1 [0005]
- DE 4309854 C2 [0006] DE 4309854 C2 [0006]
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010007072A DE102010007072A1 (en) | 2010-02-06 | 2010-02-06 | Method for operating internal combustion engine with exhaust gas passage, involves arranging catalyst in exhaust gas passage, where secondary air pump conveys secondary air mass flow upstream catalyst in exhaust gas passage |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010007072A DE102010007072A1 (en) | 2010-02-06 | 2010-02-06 | Method for operating internal combustion engine with exhaust gas passage, involves arranging catalyst in exhaust gas passage, where secondary air pump conveys secondary air mass flow upstream catalyst in exhaust gas passage |
Publications (1)
Publication Number | Publication Date |
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DE102010007072A1 true DE102010007072A1 (en) | 2011-08-11 |
Family
ID=44316504
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DE102010007072A Ceased DE102010007072A1 (en) | 2010-02-06 | 2010-02-06 | Method for operating internal combustion engine with exhaust gas passage, involves arranging catalyst in exhaust gas passage, where secondary air pump conveys secondary air mass flow upstream catalyst in exhaust gas passage |
Country Status (1)
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DE (1) | DE102010007072A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11073059B2 (en) | 2019-08-22 | 2021-07-27 | Ford Global Technologies, Llc | Method and system for exhaust air injection |
FR3122215A1 (en) * | 2021-04-26 | 2022-10-28 | Psa Automobiles Sa | METHOD FOR INJECTING AIR INTO AN EXHAUST GAS CATALYST |
DE102021114738A1 (en) | 2021-06-08 | 2022-12-08 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Method for carrying out an exhaust aftertreatment for an internal combustion engine of a vehicle |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0469170A1 (en) * | 1990-08-01 | 1992-02-05 | Siemens Aktiengesellschaft | Method for heating an exhaust gas catalyst |
EP0736676A1 (en) * | 1995-04-05 | 1996-10-09 | Ford Motor Company Limited | Controlling secondary air introduced into an internal combustion engine |
DE19957184A1 (en) * | 1999-11-27 | 2001-05-31 | Volkswagen Ag | Operating exhaust gas purification device comprises operating engine in rich operating mode with reduction catalyst and oxidation catalyst and adjusting secondary air pump to specified lambda value |
DE10026359A1 (en) * | 2000-05-27 | 2001-12-13 | Volkswagen Ag | Exhaust cleaning unit for remote-ignition internal combustion engine has two 3-way catalytic converters with turbo charger in between and controllable secondary air pump and regulating and measuring devices to reduce toxic emissions |
DE4309854C2 (en) | 1993-03-26 | 2002-12-05 | Bosch Gmbh Robert | Method and device for controlling the secondary air supply for an internal combustion engine |
DE10205966A1 (en) | 2002-02-14 | 2003-08-21 | Bosch Gmbh Robert | Process and device for monitoring the functioning of a secondary air system in a combustion engine with an exhaust gas system, closes secondary pump if a defect arises |
DE10327298A1 (en) * | 2002-07-12 | 2004-01-29 | Ford Global Technologies, LLC (n.d.Ges.d. Staates Delaware), Dearborn | Procedure for starting a vehicle with low pollutant emissions and improved fuel economy |
DE10338935A1 (en) | 2003-08-23 | 2005-04-21 | Volkswagen Ag | Method for heating a combustion engine catalytic converter system, requires determining values of engine air-mass flow and secondary air-mass flow during heating phase |
DE102004041457A1 (en) | 2004-08-27 | 2006-04-27 | Volkswagen Ag | Operating method for internal combustion engine involves supplying of components of internal combustion engine from an electric on-board supply system with on-board power supply voltage, which increases according to operating parameters |
-
2010
- 2010-02-06 DE DE102010007072A patent/DE102010007072A1/en not_active Ceased
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0469170A1 (en) * | 1990-08-01 | 1992-02-05 | Siemens Aktiengesellschaft | Method for heating an exhaust gas catalyst |
DE4309854C2 (en) | 1993-03-26 | 2002-12-05 | Bosch Gmbh Robert | Method and device for controlling the secondary air supply for an internal combustion engine |
EP0736676A1 (en) * | 1995-04-05 | 1996-10-09 | Ford Motor Company Limited | Controlling secondary air introduced into an internal combustion engine |
DE19957184A1 (en) * | 1999-11-27 | 2001-05-31 | Volkswagen Ag | Operating exhaust gas purification device comprises operating engine in rich operating mode with reduction catalyst and oxidation catalyst and adjusting secondary air pump to specified lambda value |
DE10026359A1 (en) * | 2000-05-27 | 2001-12-13 | Volkswagen Ag | Exhaust cleaning unit for remote-ignition internal combustion engine has two 3-way catalytic converters with turbo charger in between and controllable secondary air pump and regulating and measuring devices to reduce toxic emissions |
DE10205966A1 (en) | 2002-02-14 | 2003-08-21 | Bosch Gmbh Robert | Process and device for monitoring the functioning of a secondary air system in a combustion engine with an exhaust gas system, closes secondary pump if a defect arises |
DE10327298A1 (en) * | 2002-07-12 | 2004-01-29 | Ford Global Technologies, LLC (n.d.Ges.d. Staates Delaware), Dearborn | Procedure for starting a vehicle with low pollutant emissions and improved fuel economy |
DE10338935A1 (en) | 2003-08-23 | 2005-04-21 | Volkswagen Ag | Method for heating a combustion engine catalytic converter system, requires determining values of engine air-mass flow and secondary air-mass flow during heating phase |
DE102004041457A1 (en) | 2004-08-27 | 2006-04-27 | Volkswagen Ag | Operating method for internal combustion engine involves supplying of components of internal combustion engine from an electric on-board supply system with on-board power supply voltage, which increases according to operating parameters |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11073059B2 (en) | 2019-08-22 | 2021-07-27 | Ford Global Technologies, Llc | Method and system for exhaust air injection |
FR3122215A1 (en) * | 2021-04-26 | 2022-10-28 | Psa Automobiles Sa | METHOD FOR INJECTING AIR INTO AN EXHAUST GAS CATALYST |
WO2022229532A1 (en) * | 2021-04-26 | 2022-11-03 | Psa Automobiles Sa | Method for injecting air into an exhaust gas catalytic converter |
DE102021114738A1 (en) | 2021-06-08 | 2022-12-08 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Method for carrying out an exhaust aftertreatment for an internal combustion engine of a vehicle |
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