DE10252144B4 - Method for operating a gas-operated internal combustion engine with exhaust gas purification - Google Patents
Method for operating a gas-operated internal combustion engine with exhaust gas purification Download PDFInfo
- Publication number
- DE10252144B4 DE10252144B4 DE10252144A DE10252144A DE10252144B4 DE 10252144 B4 DE10252144 B4 DE 10252144B4 DE 10252144 A DE10252144 A DE 10252144A DE 10252144 A DE10252144 A DE 10252144A DE 10252144 B4 DE10252144 B4 DE 10252144B4
- Authority
- DE
- Germany
- Prior art keywords
- internal combustion
- combustion engine
- lambda
- exhaust gas
- catalytic converter
- 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
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Classifications
-
- 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
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1459—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being a hydrocarbon content or concentration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/02—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with gaseous fuels
- F02D19/021—Control of components of the fuel supply system
- F02D19/023—Control of components of the fuel supply system to adjust the fuel mass or volume flow
-
- 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
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0027—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures the fuel being gaseous
-
- 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
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio
- F02D41/1456—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio with sensor output signal being linear or quasi-linear with the concentration of oxygen
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
- F02M21/0215—Mixtures of gaseous fuels; Natural gas; Biogas; Mine gas; Landfill gas
-
- 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
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Exhaust Gas After Treatment (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Die Erfindung betrifft eine gasbetriebene Verbrennungskraftmaschine mit Abgasreinigung. Aufgabe der Erfindung ist es, einen insbesondere erdgasbetriebenen Ottomotor mit nachgeschaltetem Drei-Wege-Katalysator zur Reinigung der Abgase der Verbrennungskraftmaschine zu schaffen, mit dem unter Berücksichtigung einer laufzeitbedingten Verkleinerung und Verschiebung des Bereiches der optimalen Methanumsetzung am Katalysator ein über den Betriebszeitraum dauerhafter schadstoffarmer Betrieb bei Einhaltung der Abgasgrenzwerte erreicht wird. Zur Einstellung einer optimalen Methankonvertierung am Drei-Wege-Katalysator 2 wird erfindungsgemäß in einem Motorsteuergerät 3 aus der erfassten Methankonzentration im Abgastrakt nach dem Drei-Wege-Katalysator 2 ein Korrekturwert ermittelt, mit dem unter Berücksichtigung der mittels Lambda-Sonde 6 vor dem Katalysator ermittelten Abgaswerte das der Verbrennungskraftmaschine 1 zugeführte Luft-Kraftstoff-Gemisch eingestellt wird.The invention relates to a gas-powered internal combustion engine with exhaust gas purification. The object of the invention is to create a particularly natural gas-powered gasoline engine with a downstream three-way catalytic converter for cleaning the exhaust gases of the internal combustion engine, with which, taking into account a runtime-related reduction in size and shifting of the range of optimal methane conversion on the catalytic converter, continuous low-pollutant operation over the operating period Compliance with the exhaust gas limit values is achieved. To set an optimal methane conversion on the three-way catalytic converter 2, a correction value is determined according to the invention in an engine control unit 3 from the detected methane concentration in the exhaust tract after the three-way catalytic converter 2, with which, taking into account the values determined by means of the lambda probe 6 upstream of the catalytic converter Exhaust gas values the air-fuel mixture supplied to the internal combustion engine 1 is set.
Description
Die Erfindung betrifft ein Verfahren zum Betrieb einer gasbetriebenen Verbrennungskraftmaschine mit Abgasreinigung mit den im Oberbegriff des Patenanspruches 1 genannten Merkmalen.The invention relates to a method for operating a gas-powered internal combustion engine with exhaust gas purification with the features mentioned in the preamble of
Mit Gas betriebene Kraftfahrzeugmotoren stellen einen alternativen Antrieb zu den üblichen mit Benzin oder Diesel betriebenen Motoren, insbesondere hinsichtlich ihrer Kraftstoffkosten, dar. Derartige mit Gas betriebene Brennkraftmaschinen sind allgemein bekannt. (
Aus der
Nachteilig bei diesem Verfahren ist, dass billigend eine Abgabe des ungereinigten Abgases in die Atmosphäre, beim Nichteinhalten eines Lambda-Bereiches, in dem eine störungsfreie Reinigung der Abgase erfolgt, in Kauf genommen wird. Bei den zur Zeit bestehenden Vorschriften zur Einhaltung der Abgasnormen ist eine derartige Vorgehensweise nicht akzeptierbar.A disadvantage of this method is that approving a discharge of the unpurified exhaust gas into the atmosphere, in the non-compliance with a lambda range, in which a trouble-free cleaning of the exhaust gases takes place, is accepted. With the current regulations for compliance with the emission standards, such an approach is not acceptable.
Aus der
Mit diesem Verfahren werden lediglich Rückschlüsse auf einen gealterten Katalysator diagnostiziert. Eine geregelte Beeinflussung zur Einstellung einer optimalen Schadstoffkonvertierung erfolgt mit diesem Verfahren nicht.With this method, only conclusions about an aged catalyst are diagnosed. A controlled influence on the setting of an optimal pollutant conversion does not take place with this method.
Aus der
Auch dieses Verfahren dient lediglich zur Ermittlung des Katalysatorwirkungsgrades und zur Ermittlung und Anzeige, ob das verwendete Katalysatormaterial noch akzeptabel ist oder ob der Katalysator ausgewechselt werden muss. Eine Regelung des Katalysatorwirkungsgrades während des Betriebes erfolgt nicht.This method also serves only to determine the catalyst efficiency and to determine and indicate whether the catalyst material used is still acceptable or whether the catalyst must be replaced. A regulation of the catalyst efficiency during operation does not take place.
Aus der
Bei diesem Verfahren geht es insbesondere darum, dass mit dem NOx-Messaufnehmer ein im Abgasstrang angeordneter NOx-reduzierender oder -speichernder Katalysator hinsichtlich seiner NOx-Speicherfähigkeit geregelt wird. Die oben genannten Probleme bei einem erdgasbetriebenen Ottomotor hinsichtlich der laufzeitbedingten Verkleinerung und die arbeitspunktabhängige Verschiebung des Arbeitspunktes der Methankonvertierung im Abgaskatalysator können mit diesem Verfahren nicht beseltigt werden.This method is particularly concerned with the fact that the NO x -Messaufnehmer arranged in the exhaust line NO x -reducing or -speichernder catalyst is regulated in terms of its NO x storage capacity. The above-mentioned problems with a natural gas-driven gasoline engine with respect to the maturity-related reduction and the operating point-dependent shift of the operating point of methane conversion in the catalytic converter can not be bribed with this method.
Gemäß der
Aufgabe der Erfindung ist es, ein Verfahren zum Betrieb einer gasbetriebenen Verbrennungskraftmaschine mit einem Drei-Wege-Katalysator zu schaffen, mit dem unter Berücksichtigung einer laufzeitbedingten Verkleinerung und Verschiebung des Bereiches der optimalen Methanumsetzung am Katalysator ein über den Betriebszeitraum dauerhafter schadstoffarmer Betrieb bei Einhaltung der Abgasgrenzwerte erreicht wird.The object of the invention is to provide a method for operating a gas-fired internal combustion engine with a three-way catalyst, taking into account a maturity-related reduction and shift of the range of optimal methane conversion at the catalyst over the operating period lasting low-emission operation in compliance with the exhaust emission limits is reached.
Erfindungsgemäß wird die Aufgabe durch die Merkmale des Patentanspruches 1 gelöst.According to the invention the object is achieved by the features of
Zur Einstellung einer optimalen Methankonvertierung am Drei-Wege-Katalysator wird erfindungsgemäß in einem Motorsteuergerät aus der erfassten Methankonzentration im Abgastrakt nach dem Drei-Wege-Katalysator ein Korrekturwert ermittelt, mit dem unter Berücksichtigung der mittels Lambda-Sonde vor dem Katalysator ermittelten Abgaswerte das der Verbrennungskraftmaschine zugeführte Luft-/Kraftstoff-Gemisch eingestellt wird.To set an optimal methane conversion on the three-way catalyst, a correction value is determined according to the invention in an engine control unit from the detected methane concentration in the exhaust gas after the three-way catalyst, taking into account the determined by means of lambda probe exhaust gas values of the internal combustion engine supplied air / fuel mixture is adjusted.
Durch die Berücksichtigung der jeweils vorherrschenden Methankonzentration im Abgas nach dem Katalysator bei der Einstellung des der Verbrennungskraftmaschine zugeführten Luft-/Kraftstoff-Gemisches wird der arbeitspunktabhängigen und der laufzeitbedingten Verkleinerung/Verschiebung der optimalen Methanumsetzung im Abgaskatalysator Rechnung getragen, so dass ein über den Betriebszeitraum dauerhafter schadstoffarmer Betrieb bei Einhaltung der Abgasgrenzwerte erreicht wird. Durch das regelbare Verstellen des Luft/Kraftstoff-Gemisches werden die Verhältnisse im Katalysator so eingestellt, dass eine optimale Methankonvertierung am Katalysator erreicht wird.By taking into account the prevailing methane concentration in the exhaust gas after the catalyst in the adjustment of the air / fuel mixture supplied to the internal combustion engine, the operating point-dependent and the maturity-related reduction / shift of the optimal methane conversion in the catalytic converter is taken into account, so that over the operating period durable low-emission Operation is achieved in compliance with the exhaust emission limits. By controllable adjustment of the air / fuel mixture, the conditions in the catalyst are adjusted so that an optimal methane conversion is achieved at the catalyst.
Anhand einer Zeichnung wird nachfolgend ein Ausführungsbeispiel der Erfindung beschrieben. In den dazugehörigen Zeichnungen zeigen:Reference to a drawing, an embodiment of the invention will be described below. In the accompanying drawings show:
Der in
In dem Abgastrakt zwischen Verbrennungskraftmaschine
Anhand des erfassten Wertes der Methankonzentration wird ein laufzeitbedingter und arbeitspunktabhängiger Korrekturwert zur Erreichung einer maximalen Methankonvertierung des Drei-Wege-Katalysators
Anhand des so ermittelten neuen Lambda-Sollwertes erfolgt über einen Lambda-Regler
Die Einstellung des Luft/Kraftstoff-Gemisches mit dem im Motorsteuergerät
In der
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 11
- VerbrennungskraftmaschineInternal combustion engine
- 22
- Drei-Wege-KatalysatorThree-way catalytic converter
- 33
- MotorsteuergerätEngine control unit
- 44
- Lambda-ReglerLambda control
- 55
- Sensorsensor
- 66
- Lambda-SondeLambda probe
- 77
- Konversionsrate des Katalysators bei einem Kraftstoff mit einer Aktanzahl von 95Conversion rate of the catalyst for a fuel with a number of actives of 95
- 88th
- Konversionsrate eines neuen Katalysators bei ErdgasbetriebConversion rate of a new catalytic converter during natural gas operation
- 99
- Konversionsrate eines gealterten Katalysators bei ErdgasbetriebConversion rate of an aged catalyst during natural gas operation
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10252144A DE10252144B4 (en) | 2002-11-09 | 2002-11-09 | Method for operating a gas-operated internal combustion engine with exhaust gas purification |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10252144A DE10252144B4 (en) | 2002-11-09 | 2002-11-09 | Method for operating a gas-operated internal combustion engine with exhaust gas purification |
Publications (2)
Publication Number | Publication Date |
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DE10252144A1 DE10252144A1 (en) | 2004-05-19 |
DE10252144B4 true DE10252144B4 (en) | 2012-08-23 |
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DE10252144A Expired - Fee Related DE10252144B4 (en) | 2002-11-09 | 2002-11-09 | Method for operating a gas-operated internal combustion engine with exhaust gas purification |
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DE102010033336B4 (en) * | 2010-08-04 | 2013-01-17 | Audi Ag | Method for regulating the composition of the exhaust gas of an internal combustion engine |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3614535C2 (en) * | 1986-04-29 | 1988-09-22 | Comuna-Metall Vorrichtungs- U. Maschinenbau Gmbh, 4900 Herford, De | |
DE3842430A1 (en) * | 1987-09-22 | 1990-06-21 | Fabio Armari | Method for the conversion of a diesel engine into a spark ignition engine fed with liquified gas and the engine thereby obtained |
US5329764A (en) * | 1993-01-11 | 1994-07-19 | Ford Motor Company | Air/fuel feedback control system |
DE19852244C1 (en) * | 1998-11-12 | 1999-12-30 | Siemens Ag | Controlling NOx emission in exhaust gases passing through three-way catalyst followed by lambda sensor |
DE19758154C2 (en) * | 1997-02-24 | 2001-03-15 | Ford Global Tech Inc | Device and method for monitoring the performance of a catalyst |
DE19635248C2 (en) * | 1996-08-30 | 2001-05-23 | Ficht Gmbh & Co Kg | LPG engine |
DE19953601C2 (en) * | 1999-11-08 | 2002-07-11 | Siemens Ag | Method for checking an exhaust gas catalytic converter of an internal combustion engine |
-
2002
- 2002-11-09 DE DE10252144A patent/DE10252144B4/en not_active Expired - Fee Related
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3614535C2 (en) * | 1986-04-29 | 1988-09-22 | Comuna-Metall Vorrichtungs- U. Maschinenbau Gmbh, 4900 Herford, De | |
DE3842430A1 (en) * | 1987-09-22 | 1990-06-21 | Fabio Armari | Method for the conversion of a diesel engine into a spark ignition engine fed with liquified gas and the engine thereby obtained |
US5329764A (en) * | 1993-01-11 | 1994-07-19 | Ford Motor Company | Air/fuel feedback control system |
DE19635248C2 (en) * | 1996-08-30 | 2001-05-23 | Ficht Gmbh & Co Kg | LPG engine |
DE19758154C2 (en) * | 1997-02-24 | 2001-03-15 | Ford Global Tech Inc | Device and method for monitoring the performance of a catalyst |
DE19852244C1 (en) * | 1998-11-12 | 1999-12-30 | Siemens Ag | Controlling NOx emission in exhaust gases passing through three-way catalyst followed by lambda sensor |
DE19953601C2 (en) * | 1999-11-08 | 2002-07-11 | Siemens Ag | Method for checking an exhaust gas catalytic converter of an internal combustion engine |
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Publication number | Publication date |
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DE10252144A1 (en) | 2004-05-19 |
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