EP1163510A1 - KALIBRIERUNG EINES NOx-SENSORS - Google Patents
KALIBRIERUNG EINES NOx-SENSORSInfo
- Publication number
- EP1163510A1 EP1163510A1 EP00910727A EP00910727A EP1163510A1 EP 1163510 A1 EP1163510 A1 EP 1163510A1 EP 00910727 A EP00910727 A EP 00910727A EP 00910727 A EP00910727 A EP 00910727A EP 1163510 A1 EP1163510 A1 EP 1163510A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nox
- sensor
- characteristic curve
- internal combustion
- engine
- 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
Links
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
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2425—Particular ways of programming the data
- F02D41/2429—Methods of calibrating or learning
- F02D41/2451—Methods of calibrating or learning characterised by what is learned or calibrated
- F02D41/2474—Characteristics of 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
- F02D41/14—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
- F02D41/146—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 NOx content or concentration
-
- 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
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2425—Particular ways of programming the data
- F02D41/2429—Methods of calibrating or learning
- F02D41/2441—Methods of calibrating or learning characterised by the learning conditions
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/416—Systems
- G01N27/417—Systems using cells, i.e. more than one cell and probes with solid electrolytes
- G01N27/4175—Calibrating or checking the analyser
Definitions
- the method relates to the determination of the NOx content of the exhaust gas by means of a NOx sensor and relates in particular to a method for calibrating and operating such a NOx sensor.
- NOx sensors for determining the NOx content in the exhaust gas of an internal combustion engine are known in various forms and need no further explanation.
- knowledge of the NOx content in the exhaust tract behind a NOx storage catalytic converter is necessary in order, for example, to be able to determine the point in time at which NOx can no longer be stored in the NOx storage device, i.e. the NOx storage is filled, so that a regeneration phase is necessary.
- a catalytic converter in the exhaust tract of the at least occasionally lean-burn internal combustion engine, and behind this catalytic converter there is a measuring device which is able to measure the NOx concentration in the exhaust gas, for example a NOx sensor.
- the system also has an engine control unit that can process the measured NOx signal.
- the display accuracy of the NOx sensors available today shows a different error measure from the actual actual value of the NOx concentration.
- These individual inaccuracies in the characteristic curve of the sensor used lead to errors in the control behavior of the engine control unit, so that, for example, the degree of filling of the NOx store is not exactly recognized, as a result of which the regeneration is switched on too late, which leads to increased environmental pollution.
- the object of the invention is therefore to improve the accuracy of the NOx sensor.
- the present invention relates to a method for determining the NOx concentration of an exhaust gas stream of an internal combustion engine by means of a NOx sensor, the sensor being calibrated by means of selected operating points. Exactly one selected engine operating point is preferably used. This enables the offset of the characteristic curve of the NOx sensor to be corrected. Furthermore, the slope of the characteristic curve of the NOx sensor can be corrected.
- the present invention relates to a lean-burn internal combustion engine with a catalytic converter located in the exhaust tract and a NOx sensor and an engine control unit, the characteristic curve of the NOx sensor being calibrated using the method according to the invention.
- Fig. 1 shows a schematic representation of a lean-running
- Fig. 2 shows the schematic representation of a sensor characteristic.
- Fig. 1 shows schematically a lean-burn internal combustion system.
- a lean-burn internal combustion engine 1 which is controlled by an engine management system 2, has an optional pre-catalytic converter 4 and a catalytic converter with NOx storage function 5 in its exhaust tract 3.
- a NOx or lambda sensor 6 is arranged behind the catalytic converter 5, which measures the NOx concentration of the exhaust gas and outputs its measurement signal to the engine management system 2 via a line 7.
- NOx sensors 6 available today have different characteristic curves, and depending on the manufacturer there is a different error measure of the actual actual value of the NOx concentration. These inaccuracies in the characteristic curve of the sensor 6 have, at least in the linear range, several causes which can be distinguished in the accuracy of the offset 8 and the accuracy of the slope 9 (sensitivity).
- 2 shows a characteristic curve of a NOx sensor.
- the sensor output signal OUT is shown in arbitrary units as a function of the NOx concentration NOx in ppm.
- the characteristic curve which is linear in the region of interest has an offset 8 (intercept) and a slope 9.
- an operating point (at least one operating point) of the engine 1 is used, at which the NOx concentration behind the catalytic converter 5 can be assumed with sufficient accuracy.
- the NOx signal measured by sensor 6 is corrected with the assumed NOx concentration. For example, NOx concentration is not to be expected in the overrun fuel cutoff phases of engine 1, so that such an engine operating point can be used to calibrate NOx sensor 6.
- the following point can also be used for calibration, for example: in a certain temperature range of the catalytic converter 5, for example at approximately 350 ° C., even for a severely damaged one the poisoned catalytic converter 5 is assumed to be almost 100% NOx storage in the catalytic converter 5 at least for a certain time, for example for 5-10 s, after a previous NOx regeneration while the engine 1 is idling due to the low NOx mass flow .
- the actual value of the NOx concentration after the catalyst 5 then ranges between 0 and 5 ppm.
- Such a point in time can therefore advantageously be used to calibrate the offset of the characteristic curve of a NOx sensor 6.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Combustion & Propulsion (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Physics & Mathematics (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Molecular Biology (AREA)
- Exhaust Gas After Treatment (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19911664 | 1999-03-16 | ||
DE1999111664 DE19911664A1 (de) | 1999-03-16 | 1999-03-16 | Kalibrierung eines NOx-Sensors |
PCT/EP2000/001663 WO2000055614A1 (de) | 1999-03-16 | 2000-02-28 | KALIBRIERUNG EINES NOx-SENSORS |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1163510A1 true EP1163510A1 (de) | 2001-12-19 |
Family
ID=7901152
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00910727A Ceased EP1163510A1 (de) | 1999-03-16 | 2000-02-28 | KALIBRIERUNG EINES NOx-SENSORS |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1163510A1 (de) |
JP (1) | JP4535357B2 (de) |
CN (1) | CN1222768C (de) |
DE (1) | DE19911664A1 (de) |
WO (1) | WO2000055614A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106574567A (zh) * | 2014-07-28 | 2017-04-19 | 丰田自动车株式会社 | 内燃发动机的控制系统 |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10023072B4 (de) * | 2000-05-11 | 2013-07-04 | Volkswagen Ag | Verfahren sowie Vorrichtung zur Bestimmung einer NOx-Konzentration eines Abgasstromes einer Verbrennungskraftmaschine |
WO2002082067A2 (de) * | 2001-04-05 | 2002-10-17 | Robert Bosch Gmbh | Gassensor, insbesondere lambda-sonde |
FR2849112B1 (fr) * | 2002-12-18 | 2005-02-04 | Renault Sa | Procede de commande d'elements d'execution de fonctions elementaires de moteur a combustion interne |
DE10309422B4 (de) * | 2003-03-05 | 2016-09-29 | Volkswagen Ag | Verfahren und Vorrichtung zur Kalibrierung eines NOx-Sensors |
DE102004051747A1 (de) * | 2004-10-23 | 2006-04-27 | Robert Bosch Gmbh | Verfahren zum Betreiben einer Brennkraftmaschine und Vorrichtung zur Durchführung des Verfahrens |
US8086329B2 (en) * | 2005-05-31 | 2011-12-27 | Borgwarner Inc. | Method of actuator control |
FR2891871B1 (fr) * | 2005-10-10 | 2007-12-14 | Renault Sas | Systeme et procede pour reduire une dispersion d'emission d'un element dans un gaz d'echappement |
US7900614B2 (en) | 2008-05-22 | 2011-03-08 | Ford Global Technologies, Llc | Self-calibrating NOx sensor |
JP4692911B2 (ja) | 2008-09-18 | 2011-06-01 | トヨタ自動車株式会社 | NOxセンサの出力較正装置及び出力較正方法 |
CN101509433B (zh) * | 2008-12-25 | 2012-11-21 | 联合汽车电子有限公司 | 基于Lambda闭环控制的氧传感器劣化模拟器控制偏差的校准方法 |
SE535748C2 (sv) * | 2010-04-08 | 2012-12-04 | Scania Cv Ab | Anordning och förfarande för att detektera ett tillstånd hos en NOx-sensor hos ett motorfordon |
US8930121B2 (en) | 2011-04-07 | 2015-01-06 | GM Global Technology Operations LLC | Offset and slow response diagnostic methods for NOx sensors in vehicle exhaust treatment applications |
DE102013209487B4 (de) * | 2013-05-22 | 2020-07-02 | Mtu Friedrichshafen Gmbh | Verfahren zum Betreiben einer Antriebseinrichtung sowie entsprechende Antriebseinrichtung |
JP6398789B2 (ja) * | 2015-02-27 | 2018-10-03 | いすゞ自動車株式会社 | 診断装置 |
CN110702849A (zh) * | 2018-07-09 | 2020-01-17 | 卓品智能科技无锡有限公司 | 一种车载氮氧传感器检测值的自学习修正方法 |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3513761A1 (de) * | 1985-04-17 | 1986-10-23 | Bayer Diagnostic & Electronic | Elektrochemischer messfuehler |
DE3827978A1 (de) * | 1987-11-10 | 1989-05-18 | Bosch Gmbh Robert | Verfahren und vorrichtung fuer stetige lambdaregelung |
US5239971A (en) * | 1991-08-03 | 1993-08-31 | Mitsubishi Denki K.K. | Trouble diagnosis device for exhaust gas recirculation system |
US5426934A (en) * | 1993-02-10 | 1995-06-27 | Hitachi America, Ltd. | Engine and emission monitoring and control system utilizing gas sensors |
DE4420946B4 (de) * | 1994-06-16 | 2007-09-20 | Robert Bosch Gmbh | Steuersystem für die Kraftstoffzumessung bei einer Brennkraftmaschine |
DE19511548A1 (de) * | 1995-03-29 | 1996-06-13 | Daimler Benz Ag | Verfahren und Vorrichtung zur Stickoxidreduzierung im Abgas einer Brennkraftmaschine |
JP3852788B2 (ja) * | 1995-10-02 | 2006-12-06 | 株式会社小松製作所 | ディーゼルエンジンのNOx 触媒の劣化検出装置およびその劣化検出方法 |
JPH09257668A (ja) * | 1996-03-26 | 1997-10-03 | Mitsubishi Electric Corp | ガスセンサによるガス計測方法 |
JP3470012B2 (ja) * | 1996-05-30 | 2003-11-25 | 日本碍子株式会社 | ガス分析計及びその校正方法 |
DE19635977A1 (de) * | 1996-09-05 | 1998-03-12 | Bosch Gmbh Robert | Sensor zur Überwachung eines NOx-Katalysators |
US5743084A (en) * | 1996-10-16 | 1998-04-28 | Ford Global Technologies, Inc. | Method for monitoring the performance of a nox trap |
JP3372186B2 (ja) * | 1997-03-21 | 2003-01-27 | 日本特殊陶業株式会社 | ガスセンサの補正方法及びガス濃度測定システム |
JP3621827B2 (ja) * | 1997-05-02 | 2005-02-16 | 日本特殊陶業株式会社 | 窒素酸化物濃度の測定方法及び測定装置 |
JP3702924B2 (ja) * | 1997-05-14 | 2005-10-05 | 三菱自動車工業株式会社 | 排気浄化装置 |
JP3635191B2 (ja) * | 1997-07-28 | 2005-04-06 | 日本特殊陶業株式会社 | ガスセンサ |
JP3501956B2 (ja) * | 1997-08-06 | 2004-03-02 | 日本特殊陶業株式会社 | 窒素酸化物濃度測定装置及び窒素酸化物濃度測定器の制御方法 |
JP3589872B2 (ja) * | 1997-09-11 | 2004-11-17 | 日本特殊陶業株式会社 | 排出ガス濃度検出方法及びその装置 |
-
1999
- 1999-03-16 DE DE1999111664 patent/DE19911664A1/de not_active Ceased
-
2000
- 2000-02-28 WO PCT/EP2000/001663 patent/WO2000055614A1/de active Application Filing
- 2000-02-28 EP EP00910727A patent/EP1163510A1/de not_active Ceased
- 2000-02-28 CN CN 00805013 patent/CN1222768C/zh not_active Expired - Fee Related
- 2000-02-28 JP JP2000605195A patent/JP4535357B2/ja not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO0055614A1 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106574567A (zh) * | 2014-07-28 | 2017-04-19 | 丰田自动车株式会社 | 内燃发动机的控制系统 |
US10267255B2 (en) | 2014-07-28 | 2019-04-23 | Toyota Jidosha Kabushiki Kaisha | Control system of internal combustion engine |
CN106574567B (zh) * | 2014-07-28 | 2019-11-29 | 丰田自动车株式会社 | 内燃发动机的控制系统 |
Also Published As
Publication number | Publication date |
---|---|
CN1343309A (zh) | 2002-04-03 |
JP4535357B2 (ja) | 2010-09-01 |
CN1222768C (zh) | 2005-10-12 |
JP2002539448A (ja) | 2002-11-19 |
DE19911664A1 (de) | 2000-09-21 |
WO2000055614A1 (de) | 2000-09-21 |
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Legal Events
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