DE102005051358A1 - 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 - Google Patents
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 Download PDFInfo
- Publication number
- DE102005051358A1 DE102005051358A1 DE102005051358A DE102005051358A DE102005051358A1 DE 102005051358 A1 DE102005051358 A1 DE 102005051358A1 DE 102005051358 A DE102005051358 A DE 102005051358A DE 102005051358 A DE102005051358 A DE 102005051358A DE 102005051358 A1 DE102005051358 A1 DE 102005051358A1
- Authority
- DE
- Germany
- Prior art keywords
- oxygen
- mass
- exhaust gas
- egr
- channel
- 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.)
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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
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0047—Controlling exhaust gas recirculation [EGR]
- F02D41/0065—Specific aspects of external EGR control
- F02D41/0072—Estimating, calculating or determining the EGR rate, amount or flow
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- 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
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/45—Sensors specially adapted for EGR systems
- F02M26/46—Sensors specially adapted for EGR systems for determining the characteristics of gases, e.g. composition
-
- 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
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/49—Detecting, diagnosing or indicating an abnormal function of the EGR system
-
- 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
- F02D41/1439—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the position of the sensor
-
- 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)
- Analytical Chemistry (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Bestimmung der Abgasmasse im AGR-Kanal gemäß dem Oberbegriff des Anspruchs 1 bzw. des Anspruchs 7.The The invention relates to a method and a device for determination the exhaust gas mass in the EGR channel according to the preamble of claim 1 or claim 7.
Aufgrund der geltenden Abgasnormen und um die Umweltbelastung zu verringern ist eine Reduzierung der Emission schädlicher Abgasbestandteile notwendig. Bei magerbetreibbaren Brennkraftmaschinen kommt zur Reduktion der Stickoxid-Emission die Abgasrückführung, kurz AGR, zum Einsatz. Um eine genaue Steuerung der magerbetreibbaren Brennkraftmaschine zu erreichen, ist daher eine genaue Kenntnis der Abgasrückführung, insbesondere der rückgeführten Abgasmasse bzw. des rückgeführten Abgasmassenstroms, notwendig.by virtue of the applicable exhaust emission standards and to reduce the environmental impact it is necessary to reduce the emission of harmful exhaust components. In lean-burnable internal combustion engines comes to the reduction of Nitrogen oxide emission the exhaust gas recirculation, short AGR, used. For precise control of the lean-burn internal combustion engine To achieve, therefore, is an accurate knowledge of exhaust gas recirculation, in particular the recirculated exhaust gas mass or the recirculated exhaust gas mass flow, necessary.
In
der Druckschrift
Ferner
wird in der
Aus
Allerdings wird auch bei den bekannten Verfahren keine Bestimmung der tatsächlichen Abgasmasse bzw. des Abgasflusses im AGR-Kanal vorgenommen, so dass eine genaue Regelung der Brennkraftmaschine hinsichtlich einer Minimierung der schädlichen Abgasbestandteile nicht möglich ist.Indeed is also in the known method no determination of the actual Exhaust mass or the exhaust gas flow in the EGR channel made so that a precise control of the internal combustion engine with regard to minimization the harmful Exhaust gas components not possible is.
Der Erfindung liegt daher die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung zur Bestimmung der Abgasmasse im AGR während des Fahrbetriebs der Brennkraftmaschine zu schaffen.Of the Invention is therefore the object of a method and a Device for determining the exhaust gas mass in the EGR while driving to create the internal combustion engine.
Diese Aufgabe wird durch ein Verfahren zur Bestimmung der Abgasmasse im AGR-Kanal mit den Merkmalen des Anspruchs 1 sowie durch eine Vorrichtung zur Bestimmung der Abgasmasse im AGR-Kanal mit den Merkmalen des Anspruchs 7 gelöst.These The object is achieved by a method for determining the exhaust gas mass in EGR channel with the features of claim 1 and by a device for determining the exhaust gas mass in the EGR channel with the characteristics of Claim 7 solved.
Bei dem erfindungsgemäßen Verfahren zur Bestimmung der Abgasmasse im AGR-Kanal einer magerbetreibbaren Brennkraftmaschine mit mindestens einem Abgashauptkanal und einem davon abzweigenden, mittels eines AGR-Ventils verschließbaren AGR-Kanal werden im AGR-Kanal Abgase aus dem Abgashauptkanal eingespeist, wird im AGR-Kanal durch Sauerstoffpumpen ein vorgegebener Sauerstoffgehalt eingestellt, und wird aus dem Verhältnis der Masse des gepumpten Sauerstoffs zur Differenz der Lambda-Werte im AGR-Kanal vor und nach dem Sauerstoffpumpen die Masse des Abgases im AGR-Kanal bestimmt.at the method according to the invention for determining the exhaust gas mass in the EGR channel of a lean-burnable Internal combustion engine with at least one exhaust main channel and a thereof branching, closable by means of an EGR valve EGR channel In the EGR channel, exhaust gases are fed in from the exhaust main channel, is in the EGR channel by oxygen pumping a predetermined oxygen content adjusted, and is from the ratio of the mass of the pumped Oxygen to the difference of lambda values in the EGR channel before and after the oxygen pumping determines the mass of the exhaust gas in the EGR channel.
Vorzugsweise erfolgt das Sauerstoffpumpen im AGR-Kanal durch eine Sauerstoff-Pumpzelle oder durch eine Sauerstoff-Pump-und-Meßzelle.Preferably Oxygen pumping in the EGR channel is performed by an oxygen pumping cell or by an oxygen pumping and measuring cell.
Weiter bevorzugt erfolgt die Messung des Lambda-Wertes im AGR-Kanal durch eine Lambda-Sonde.Further The measurement of the lambda value in the EGR channel is preferably carried out by a lambda probe.
Vorzugsweise erfolgt die Zuordnung der Masse des Abgases als Funktion des Verhältnisses von gepumptem Sauerstoff zur Differenz der Lambda-Werte über eine Tabelle, die beispielsweise in einem entsprechenden Steuergerät abgelegt ist. Ferner wird weiter bevorzugt die Masse des Abgases im AGR-Kanal zur Steuerung der Brennkraftmaschine verwendet. Ferner kann durch einen Vergleich der bestimmten Masse des Abgases im AGR-Kanal mit der durch die Stellung des AGR-Ventils eingestellten Masse des Abgases im AGR-Kanal die Funktionsfähigkeit des AGR-Ventils überprüft werden.Preferably the assignment of the mass of the exhaust gas takes place as a function of the ratio of pumped oxygen to the difference of lambda values over one Table, for example, stored in a corresponding control unit is. Furthermore, it is further preferred that the mass of the exhaust gas in the EGR channel used to control the internal combustion engine. Furthermore, by a comparison of the specific mass of the exhaust gas in the EGR channel with the through the position of the EGR valve set mass of the exhaust gas in EGR channel the functionality of the EGR valve.
Ein erfindungsgemäßer Sensor zur Messung der Abgasrückführrate einer magerbetreibaren Brennkraftmaschine mit mindestens einem Abgashauptkanal und einem vom Abgashauptkanal abzweigenden AGR-Kanal, weist eine Sauerstoffpumpvorrichtung zum Pumpen von Sauerstoff in das Abgas des AGR-Kanals und eine Universal-Lambda-Sonde auf.One inventive sensor for measuring the exhaust gas recirculation rate of a lean-burn internal combustion engine with at least one exhaust main channel and a branched from the exhaust main channel EGR channel, has a Oxygen pumping device for pumping oxygen into the exhaust gas of the EGR channel and a universal lambda probe.
Vorzugsweise wird die Universal-Lambda-Sonde durch einen Breitband-Lambda-Sensor gebildet. Weiter bevorzugt weist die Sauerstoffpumpeinheit einen Sauerstoffsensor und eine Sauerstoffpumpe auf.Preferably The universal lambda probe is formed by a broadband lambda sensor. More preferably, the oxygen pump unit has an oxygen sensor and an oxygen pump on.
Insbesondere kann die Sauerstoffpumpeinheit durch Kombination einer Sprung-Lambda-Sonde mit einer Sauerstoffpumpe gebildet sein.Especially For example, the oxygen pump unit may be combined by combining a leaky lambda probe with an oxygen pump be formed.
Ferner ist ebvorzugt, dass der Sensor mit Referenzluft beaufschlagt wird, die Sauerstoffpumpvorrichtung zum AGR-Ventil hin gerichtet ist und die Universal-Lambda-Sonde zum Ansaugkanal der Brennkraftmaschine hin gerichtet ist.Further ebvorzugt is that the sensor is supplied with reference air, the oxygen pumping device is directed towards the EGR valve and the universal lambda probe is directed to the intake port of the internal combustion engine.
Durch die erfindungsgemäße Anordnung wird ein AGR-Sensor geschaffen, der mit bekannten Elementen der Lambda-Sensorik kostengünstig aufgebaut ist.By the arrangement according to the invention is an EGR sensor provided with known elements of lambda sensors economical is constructed.
Bevorzugte Ausführungsformen der Erfindung werden nach folgend anhand der Zeichnungen erläutert. Dabei zeigtpreferred embodiments The invention will be explained below with reference to the drawings. there shows
Zuerst erfolgt die Berechnung des stöchiometrischen Luftbedarfs. Anschließend der aktuelle Lambda-Wert erfasst und es wird geprüft, ob Lambda größer oder kleiner Eins ist. Ist Lambda größer Eins, so wird Sauerstoff, d.h. O2, durch die Sauerstoffpumpe aus dem AGR abgepumpt. Ist Lambda kleiner Eins, d.h. fettes Gemisch, so wird die Sauerstoffmasse für Lambda gleich Eins bezogen auf 1 Kg Kraftstoff berechnet. Im nächsten Schritt wird die Sauerstoffmasse bezogen auf 1 kg Kraftstoff für ein beliebiges Lambda gleich "x" ermittelt. Dann erfolgt eine Berechnung der vorgenannten O2-Masse bei x-Kilogramm Teilstrom im AGR. Aus den Zusammenhängen erfolgt nun ein gedankliches Hochpumpen auf Lambda gleich Eins und die Berechnung der dazu erforderlichen O2-Masse. Ferner erfolgt eine Berechnung der erforderlichen O2-Masse bis zu einem Lambda gleich einem vorgegebenen Sollwert. Aus der Differenz der O2-Masse vor dem Sauerstoffpumpen und nach dem Sauerstoffpumpen ergibt sich die notwendige O2-Masse. Durch das Bilden des Verhältnisses der notwendigen O2-Masse und der entsprechenden Differenz der Lambda-Werte im AGR-Teilstrom ergibt sich der gewünschte Zusammenhang zwischen dem Verhältnis der O2-Masse zur Lambda-Differenz und der Masse des AGR-Teilstroms.First, the calculation of the stoichiometric air demand takes place. Subsequently, the current lambda value is detected and it is checked whether lambda is greater or less than one. If lambda is greater than one, oxygen, ie O 2, is pumped out of the EGR by the oxygen pump. If lambda is less than one, ie rich mixture, then the oxygen mass for lambda is calculated equal to one in relation to 1 kg of fuel. In the next step, the oxygen mass is determined based on 1 kg of fuel for any lambda equal to "x". Then, a calculation of the aforementioned O2 mass at x-kilogram partial flow in the EGR. From the contexts now a mental pumping up to lambda equal to one and the calculation of the required O2 mass. Further, a calculation of the required O2 mass up to a lambda is equal to a predetermined setpoint. The difference between the O2 mass before oxygen pumping and after oxygen pumping results in the necessary O2 mass. By forming the ratio of the necessary O 2 mass and the corresponding difference in lambda values in the EGR substream, the desired relationship between the ratio of the O 2 mass to the lambda difference and the mass of the EGR portion results current.
- 11
- BrennkraftmaschineInternal combustion engine
- 22
- Ansaugkanalintake port
- 33
- Luftair
- 44
- Abgasstrangexhaust gas line
- 55
- Abgasstromexhaust gas flow
- 66
- AGR-KanalEGR passage
- 77
- AGR-StromEGR flow
- 88th
- AGR-VentilAGR valve
- 99
- AGR-SensorEGR sensor
- 1010
- Referenzluftreference air
- 1111
- AGR-RohrEGR tube
- 1212
- Universal Lambda-SensorUniversal Lambda sensor
- 1313
- Sauerstoff-PumpvorrichtungOxygen-pumping device
- 1414
- Zuführungfeed
- 1515
- Zuführungfeed
- 1616
- Sauerstoff-PumpeOxygen pump
- 1717
- O2-SensorO2 sensor
- 1818
- Zuführungfeed
- 1919
- Zuführungfeed
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005051358A DE102005051358A1 (en) | 2005-10-25 | 2005-10-25 | 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 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005051358A DE102005051358A1 (en) | 2005-10-25 | 2005-10-25 | 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 |
Publications (1)
Publication Number | Publication Date |
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DE102005051358A1 true DE102005051358A1 (en) | 2007-04-26 |
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DE102005051358A Withdrawn DE102005051358A1 (en) | 2005-10-25 | 2005-10-25 | 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 |
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DE (1) | DE102005051358A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008135016A1 (en) * | 2007-05-02 | 2008-11-13 | Enerday Gmbh | Exhaust gas duct and fuel cell system |
EP2085593A1 (en) | 2008-01-29 | 2009-08-05 | HONDA MOTOR CO., Ltd. | Control system for internal combustion engine |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5709082A (en) * | 1994-06-27 | 1998-01-20 | General Motors Corporation | Modulation schemes for on-board diagnostic exhaust system |
US5731510A (en) * | 1995-06-24 | 1998-03-24 | Sun Electric U.K. Limited | Multi-gas sensor systems for automotive emissions measurement |
DE19849256A1 (en) * | 1998-10-26 | 2000-04-27 | Bosch Gmbh Robert | Method and appliance for diagnosing exhaust gas recirculation system of IC engine monitors effect of controlled change in rate of recirculation on emission levels |
DE19849272A1 (en) * | 1998-10-26 | 2000-05-04 | Bosch Gmbh Robert | Diagnosis of exhaust gas return system for combustion process involves evaluating speed and/or shape of variation with which lambda number follows air/fuel ratio change |
DE19908401A1 (en) * | 1999-02-26 | 2000-08-31 | Bosch Gmbh Robert | Internal combustion engine operating method, especially with weak mixture, involves reducing air fed into chamber according to residual air measured after preceding combustion cycle |
DE10007010A1 (en) * | 2000-02-16 | 2001-08-30 | Daimler Chrysler Ag | Sensor unit used for determining exhaust gas backflow rate of IC engine is subjected to exhaust gas atmosphere on one side and atmosphere consisting of exhaust gas and fresh air on other side |
DE10064667A1 (en) * | 2000-12-22 | 2002-07-04 | Siemens Ag | Multi-stage, gas sensor, operating and manufacturing process |
EP1298302A1 (en) * | 2001-09-28 | 2003-04-02 | Siemens Aktiengesellschaft | Exhaust gas purifying method for lean burn engines |
DE10230763A1 (en) * | 2002-07-09 | 2004-01-22 | Volkswagen Ag | Method and device for measuring pollutants in exhaust gases from internal combustion engines |
-
2005
- 2005-10-25 DE DE102005051358A patent/DE102005051358A1/en not_active Withdrawn
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5709082A (en) * | 1994-06-27 | 1998-01-20 | General Motors Corporation | Modulation schemes for on-board diagnostic exhaust system |
US5731510A (en) * | 1995-06-24 | 1998-03-24 | Sun Electric U.K. Limited | Multi-gas sensor systems for automotive emissions measurement |
DE19849256A1 (en) * | 1998-10-26 | 2000-04-27 | Bosch Gmbh Robert | Method and appliance for diagnosing exhaust gas recirculation system of IC engine monitors effect of controlled change in rate of recirculation on emission levels |
DE19849272A1 (en) * | 1998-10-26 | 2000-05-04 | Bosch Gmbh Robert | Diagnosis of exhaust gas return system for combustion process involves evaluating speed and/or shape of variation with which lambda number follows air/fuel ratio change |
DE19908401A1 (en) * | 1999-02-26 | 2000-08-31 | Bosch Gmbh Robert | Internal combustion engine operating method, especially with weak mixture, involves reducing air fed into chamber according to residual air measured after preceding combustion cycle |
DE10007010A1 (en) * | 2000-02-16 | 2001-08-30 | Daimler Chrysler Ag | Sensor unit used for determining exhaust gas backflow rate of IC engine is subjected to exhaust gas atmosphere on one side and atmosphere consisting of exhaust gas and fresh air on other side |
DE10064667A1 (en) * | 2000-12-22 | 2002-07-04 | Siemens Ag | Multi-stage, gas sensor, operating and manufacturing process |
EP1298302A1 (en) * | 2001-09-28 | 2003-04-02 | Siemens Aktiengesellschaft | Exhaust gas purifying method for lean burn engines |
DE10230763A1 (en) * | 2002-07-09 | 2004-01-22 | Volkswagen Ag | Method and device for measuring pollutants in exhaust gases from internal combustion engines |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008135016A1 (en) * | 2007-05-02 | 2008-11-13 | Enerday Gmbh | Exhaust gas duct and fuel cell system |
EP2085593A1 (en) | 2008-01-29 | 2009-08-05 | HONDA MOTOR CO., Ltd. | Control system for internal combustion engine |
US7792631B2 (en) | 2008-01-29 | 2010-09-07 | Honda Motor Co., Ltd. | Control system for internal combustion engine |
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