EP1048834A2 - Méthode pour corriger la courbe caractéristique d'une sonde lambda linéaire - Google Patents

Méthode pour corriger la courbe caractéristique d'une sonde lambda linéaire Download PDF

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Publication number
EP1048834A2
EP1048834A2 EP00107491A EP00107491A EP1048834A2 EP 1048834 A2 EP1048834 A2 EP 1048834A2 EP 00107491 A EP00107491 A EP 00107491A EP 00107491 A EP00107491 A EP 00107491A EP 1048834 A2 EP1048834 A2 EP 1048834A2
Authority
EP
European Patent Office
Prior art keywords
lambda
signal
lambda probe
slope
correction factor
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.)
Withdrawn
Application number
EP00107491A
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German (de)
English (en)
Other versions
EP1048834A3 (fr
Inventor
Thomas Dr. Heinze
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP1048834A2 publication Critical patent/EP1048834A2/fr
Publication of EP1048834A3 publication Critical patent/EP1048834A3/fr
Withdrawn legal-status Critical Current

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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
    • F02D41/02—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
    • F02D41/1441—Plural sensors
    • 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
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/12—Introducing corrections for particular operating conditions for deceleration
    • F02D41/123—Introducing corrections for particular operating conditions for deceleration the fuel injection being cut-off
    • 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
    • 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
    • F02D41/1486—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor with correction for particular operating conditions
    • 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
    • F02D41/1493—Details

Definitions

  • the invention relates to a method for correcting the characteristic a broadband lambda probe.
  • a three-way catalytic converter is usually arranged in the exhaust tract of the internal combustion engine.
  • a broadband lambda probe is provided upstream of this catalyst, the signal emitted depends on the residual oxygen content contained in the exhaust gas or on carbon monoxide and hydrogen (CO, H 2 ). If there is an excess of fuel (rich mixture), the signal mainly depends on CO and H 2 , and if there is excess air (lean mixture) on the residual oxygen content.
  • downstream of the three-way catalyst to arrange another lambda probe that as a monitor probe for monitoring the catalytic conversion is used and allows fine adjustment of the mixture. This is done by converting the signal from the lambda probe corrected to the lambda value, so that for the conversion cheapest lambda value can always be maintained. This The procedure is referred to as guidance or trim control.
  • This correction corresponds to a shift in the characteristic.
  • the characteristic of a broadband lambda probe due to environmental influences, aging or some Component tolerance also in its slope from that in the control unit stored characteristic curve deviate.
  • Such a deviation leads to the control unit having lambda values not equal to 1 the signal from the lambda probe into a faulty lambda value implements.
  • the invention has for its object an improved Method for correcting the characteristic of a broadband lambda probe specify with which the slope of the characteristic curve is corrected can be.
  • the invention is based on the knowledge that through the Volatile hydrocarbon emissions, for example the engine oil, the signal from the lambda probe in the overrun cut-off not immediately to that of the ambient air corresponding lambda value jumps. Instead the signal rises to this value with decreasing slope towards.
  • this slope of the signal of Lambda probe taken into account when correcting the slope of the characteristic.
  • a preferred embodiment is in a fuel cut-off phase waited for the slope of the signal of the Lambda probe falls below a threshold and then on calculates the first correction factor, which is, for example, from the quotient between the time average of the actual value of the signal from the lambda probe and a target value. From the slope that the signal from the lambda probe in has the fuel cut-off during averaging, a second correction factor is determined and with the first Correction factor multiplied to a third correction factor. The slope can then be adjusted with this third correction factor the characteristic curve can be corrected. Alternatively it is possible, each measured value of the signal of the lambda probe with the correct third correction factor.
  • the advantage of the invention is that, on the one hand the characteristic of a broadband lambda probe is better corrected secondly, no throttle intervention is necessary is. Such a throttle valve engagement affects namely in undesirably that which can be delivered by the internal combustion engine Drag torque.
  • the invention relates to the cleaning of the exhaust gas of an internal combustion engine by means of an exhaust gas purification system, such as that is shown schematically in Fig. 1. It can be about a mixture aspirating or a direct injection Act internal combustion engine. Operation of the internal combustion engine 10 of FIG. 1 is controlled by an operating control device 8. The internal combustion engine 10 sucks the intake pipe 9 air necessary for combustion. In the intake manifold 9 is a throttle valve 11 arranged for the appropriate setting the amount of air. The throttle valve 11 is about Lines from operating control unit 8, which are not specified in any more detail controlled. Alternatively, the amount of air is over accordingly actuable, e.g. Electromechanically operated valves set.
  • a three-way catalytic converter 6 in the exhaust tract 4 of the internal combustion engine 10.
  • a further NO x -reducing catalytic converter can also be provided (not shown).
  • a broadband lambda probe 5 is provided, the measured values via lines not specified to the operating control unit 8 issues. It will also be the operation control device 8 the values of other sensors, especially for the speed, Load, catalyst temperature, etc. supplied. With help the operating control unit 8 controls the operation of these measured values of the internal combustion engine 10.
  • the operating control unit 8 converts the signal from the broadband lambda probe, which is usually present as a current 5 by means of a characteristic curve into a lambda value around.
  • the operation of the internal combustion engine 10 is such that the Oxygen content in the raw exhaust gas signal from the lambda probe 5 corresponds to a predetermined signal level.
  • the measured value of the post-cat lambda probe 7 directed to a trim controller, which is an independent Device, or as shown in Fig. 1, in the operation control device 8 can be integrated. This trim control resembles e.g.
  • the characteristic curve of a lambda probe 5 is shown in FIGS. 4a and 4a 4b.
  • the output signal Ip is the Broadband lambda probe plotted against the lambda value ⁇ .
  • this application is carried out over 1 / ⁇ .
  • Fig. 2 shows the course of the lambda probe signal Ip during such a fuel cut-off.
  • Curve 1 in Fig. 2 represents the same lambda probe as for curve 2, but under the influence of hydrocarbon emissions falls below the slope of the signal Ip of the lambda probe 5 after curve 1 the threshold value of curve 3, which is about is also the case at time t0, curve 1 still has no plateau reached because disturbing residual gas cross influences are more boiling Hydrocarbons to a slow rise in Lead lambda probe signal Ip.
  • the characteristic curve used to determine the correction factor K2 is shown by way of example in FIG. 4. Each of the registered Measurement points were made in another operating state won an internal combustion engine on a test bench. On Ip_dif_rel is plotted on the x-axis as defined above has been.
  • Ip_actu is the mean value of the signal from a lambda probe in ambient air with influences from ambient pressure and Humidity variation, but without cross effects from hydrocarbon emissions.
  • the also entered in Fig. 4 Degrees of regression are those in the characteristic curve for the correction factor K2 represents stored values and shows that between the quotient of the cross- influence-free mean Ip_actu the Lambda probe and during the fuel cut-off in the measuring window determined average Ip_mess_schub and the relative Pump current difference Ip_dif_rel there is a constant relationship.
  • the map for the correction factor K2 can be stored. So it is possible during operation of the internal combustion engine due to hydrocarbon cross-influences correct errors caused.
  • correction factor K3 can now either in one Memory stored in the operating control device 8 for the lambda probe 5 can be corrected or alternatively each Reading of the lambda probe can be multiplied by the correction to effect.
  • This correction factor can be used to improve the quality of the method Update K3 adaptively, with each update it can be checked whether the newly determined correction factor is within an admissible range.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
EP00107491A 1999-04-28 2000-04-06 Méthode pour corriger la courbe caractéristique d'une sonde lambda linéaire Withdrawn EP1048834A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1999119427 DE19919427C2 (de) 1999-04-28 1999-04-28 Verfahren zur Korrektur der Kennlinie einer Breitband-Lambda-Sonde
DE19919427 1999-04-28

Publications (2)

Publication Number Publication Date
EP1048834A2 true EP1048834A2 (fr) 2000-11-02
EP1048834A3 EP1048834A3 (fr) 2002-08-07

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EP00107491A Withdrawn EP1048834A3 (fr) 1999-04-28 2000-04-06 Méthode pour corriger la courbe caractéristique d'une sonde lambda linéaire

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EP (1) EP1048834A3 (fr)
DE (1) DE19919427C2 (fr)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1143132A3 (fr) * 2000-04-05 2002-08-07 Volkswagen Aktiengesellschaft Procédé et dispositif de commande d'un moteur à combustion interne
EP1333171A1 (fr) * 2002-01-24 2003-08-06 Toyota Jidosha Kabushiki Kaisha Procédé et dispositif de détection de la concentration d'oxygène
EP1624174A1 (fr) * 2004-08-06 2006-02-08 Peugeot Citroen Automobiles S.A. Systeme de correction d'un signal de sortie d'une sonde à oxygene
EP1748173A2 (fr) * 2005-07-28 2007-01-31 Denso Corporation Dispositif de commande pour un moteur à combustion interne
DE102006000199B4 (de) * 2005-04-27 2007-08-02 Toyota Jidosha Kabushiki Kaisha, Toyota Luft-/Kraftstoff-Verhältnissteuerungsvorrichtung für eine Brennkraftmaschine
WO2008071500A1 (fr) * 2006-12-13 2008-06-19 Continental Automotive Gmbh Procédé d'étalonnage d'une sonde lambda et moteur à combustion interne
WO2011038322A3 (fr) * 2009-09-28 2011-05-19 Robert Bosch Gmbh Procédé pour adapter un signal o2 d'un capteur o2 pendant la décélération
CN102102593A (zh) * 2009-12-16 2011-06-22 罗伯特.博世有限公司 针对选定运行阶段中的功能的氧传感器运行预备性识别法
WO2012175242A1 (fr) * 2011-06-24 2012-12-27 Robert Bosch Gmbh Procédé de correction d'une caractéristique d'un élément de capteur
FR2981697A1 (fr) * 2011-10-24 2013-04-26 Bosch Gmbh Robert Procede et dispositif d'adaptation d'une regulation lambda
WO2016098276A1 (fr) * 2014-12-19 2016-06-23 Toyota Jidosha Kabushiki Kaisha Système de diagnostic d'anomalie de capteur de rapport air-carburant
EP1961940A3 (fr) * 2007-02-21 2017-07-19 NGK Spark Plug Co., Ltd. Procédé de diagnostic et appareil de contrôle pour capteur de gaz
EP2786003B1 (fr) * 2011-11-28 2019-09-18 Volkswagen AG Procédé et appareil pour contrôler un rapport air-carburaunt d'un moteur à combustion interne

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004055231B3 (de) * 2004-11-16 2006-07-20 Siemens Ag Verfahren und Vorrichtung zur Lambda-Regelung bei einer Brennkraftmaschine
DE102005056152A1 (de) 2005-11-23 2007-05-24 Robert Bosch Gmbh Verfahren zum Kalibrieren des von einem Breitband-Lambdasensor bereitgestellten Signals und Vorrichtung zur Durchführung des Verfahrens
DE102007015362A1 (de) * 2007-03-30 2008-10-02 Volkswagen Ag Verfahren zur Lambda-Regelung mit Kennlinienanpassung
JP4853548B2 (ja) * 2009-05-29 2012-01-11 株式会社デンソー 排気センサ診断装置
DE102011087312B4 (de) 2011-11-29 2024-06-27 Volkswagen Aktiengesellschaft Verfahren und Vorrichtung zur Ermittlung eines Lambdawertes oder einer Sauerstoffkonzentration eines Gasgemischs

Citations (1)

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Publication number Priority date Publication date Assignee Title
DE19842425A1 (de) 1998-09-16 2000-03-30 Siemens Ag Verfahren zur Korrektur der Kennlinie einer linearen Lambda-Sonde

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JPS61195349A (ja) * 1985-02-25 1986-08-29 Ngk Spark Plug Co Ltd 内燃機関の空燃比検出装置
JPH0643981B2 (ja) * 1985-10-02 1994-06-08 株式会社日立製作所 空燃比制御装置
JPS6469748A (en) * 1987-09-09 1989-03-15 Hitachi Ltd Air-fuel ratio controller
US5487270A (en) * 1992-07-03 1996-01-30 Nippondenso Co., Ltd. Air-fuel ratio control system for internal combustion engine
DE19819461B4 (de) * 1998-04-30 2004-07-01 Siemens Ag Verfahren zur Abgasreinigung mit Trimmregelung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19842425A1 (de) 1998-09-16 2000-03-30 Siemens Ag Verfahren zur Korrektur der Kennlinie einer linearen Lambda-Sonde

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1143132A3 (fr) * 2000-04-05 2002-08-07 Volkswagen Aktiengesellschaft Procédé et dispositif de commande d'un moteur à combustion interne
EP1333171A1 (fr) * 2002-01-24 2003-08-06 Toyota Jidosha Kabushiki Kaisha Procédé et dispositif de détection de la concentration d'oxygène
EP1624174A1 (fr) * 2004-08-06 2006-02-08 Peugeot Citroen Automobiles S.A. Systeme de correction d'un signal de sortie d'une sonde à oxygene
FR2874091A1 (fr) * 2004-08-06 2006-02-10 Peugeot Citroen Automobiles Sa Systeme de correction d'un signal de sortie d'une sonde a oxygene
DE102006000199B4 (de) * 2005-04-27 2007-08-02 Toyota Jidosha Kabushiki Kaisha, Toyota Luft-/Kraftstoff-Verhältnissteuerungsvorrichtung für eine Brennkraftmaschine
EP1748173A3 (fr) * 2005-07-28 2010-01-27 Denso Corporation Dispositif de commande pour un moteur à combustion interne
EP1748173A2 (fr) * 2005-07-28 2007-01-31 Denso Corporation Dispositif de commande pour un moteur à combustion interne
US8108130B2 (en) 2006-12-13 2012-01-31 Continental Automotive Gmbh Method for calibrating a lambda sensor and internal combustion engine
WO2008071500A1 (fr) * 2006-12-13 2008-06-19 Continental Automotive Gmbh Procédé d'étalonnage d'une sonde lambda et moteur à combustion interne
EP1961940A3 (fr) * 2007-02-21 2017-07-19 NGK Spark Plug Co., Ltd. Procédé de diagnostic et appareil de contrôle pour capteur de gaz
WO2011038322A3 (fr) * 2009-09-28 2011-05-19 Robert Bosch Gmbh Procédé pour adapter un signal o2 d'un capteur o2 pendant la décélération
US8499752B2 (en) 2009-09-28 2013-08-06 Robert Bosch Gmbh Method to adapt the O2 signal of an O2 sensor during overrun
CN102102593B (zh) * 2009-12-16 2015-10-21 罗伯特.博世有限公司 针对选定运行阶段中的功能的氧传感器运行预备性识别法
CN102102593A (zh) * 2009-12-16 2011-06-22 罗伯特.博世有限公司 针对选定运行阶段中的功能的氧传感器运行预备性识别法
DE102009054751B4 (de) 2009-12-16 2022-03-03 Robert Bosch Gmbh Verfahren zur Erkennung der Betriebsbereitschaft einer Lambda-Sonde für Funktionen in ausgewählten Betriebsphasen
EP2336532A3 (fr) * 2009-12-16 2014-06-18 Robert Bosch GmbH Procédé de reconnaissance de la capacité de fonctionnement d'une sonde lambda pour des fonctions dans des phases de fonctionnement sélectionnées
WO2012175242A1 (fr) * 2011-06-24 2012-12-27 Robert Bosch Gmbh Procédé de correction d'une caractéristique d'un élément de capteur
US9091226B2 (en) 2011-10-24 2015-07-28 Robert Bosch Gmbh Method and device for adapting a lambda control
FR2981697A1 (fr) * 2011-10-24 2013-04-26 Bosch Gmbh Robert Procede et dispositif d'adaptation d'une regulation lambda
EP2786003B1 (fr) * 2011-11-28 2019-09-18 Volkswagen AG Procédé et appareil pour contrôler un rapport air-carburaunt d'un moteur à combustion interne
WO2016098276A1 (fr) * 2014-12-19 2016-06-23 Toyota Jidosha Kabushiki Kaisha Système de diagnostic d'anomalie de capteur de rapport air-carburant

Also Published As

Publication number Publication date
DE19919427C2 (de) 2001-09-20
DE19919427A1 (de) 2000-11-02
EP1048834A3 (fr) 2002-08-07

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