CN1343309A - 氮氧化物传感器的校准 - Google Patents
氮氧化物传感器的校准 Download PDFInfo
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- CN1343309A CN1343309A CN 00805013 CN00805013A CN1343309A CN 1343309 A CN1343309 A CN 1343309A CN 00805013 CN00805013 CN 00805013 CN 00805013 A CN00805013 A CN 00805013A CN 1343309 A CN1343309 A CN 1343309A
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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
- F02D41/24—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
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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
- F02D41/1444—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
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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
- F02D41/24—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
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- 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
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- Mechanical Engineering (AREA)
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Exhaust Gas After Treatment (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
本发明涉及藉助于一个NOx传感器测定内燃机废气流中NOx浓度的一种方法,其中该传感器藉助于所选择的工作点被校正。最好应精确地采用一个选择的发动机工作点。
Description
本方法涉及藉助于一个NOx传感器测定废气的NOx含量,尤其涉及这样一种NOx传感器的校准和操作方法。
众所周知,测定内燃机废气中的NOx含量的NOx传感器有各种形式,对此不需要作进一步说明。为了使稀薄燃烧的内燃机遵守NOx的排放极限值,必需知道NOx存储催化转化器后的废气流中的NOx含量,以便能够例如确定不再可能在NOx存储器中淀积NOx的时刻,也就是说,此时NOx存储器已被填满,以致于必需有一个再生阶段。
为此,通常在至少部分时间稀薄燃烧的内燃机的废气流中设有一个催化转化器,在这个催化转化器之后还有一个能测量废气中NOx浓度的测量装置,例如一个NOx传感器。此外,这个系统还拥有能处理测得的NOx信号的内燃机控制单元。
目前可买到的NOx传感器的指示精度,对不同的制造商其NOx浓度的实际值的指示误差不尽相同。所用传感器的特性曲线的这些独特的不精确性会导致内燃机控制单元控制性能的误差,例如,从而导致不能精确地得知NOx存储器的填充度,进而会使再生接通太迟,这会导致环境污染增加。
所以本发明的任务是改进NOx传感器的精度。
这项任务由独立权利要求1的特征予以解决。本发明的优选实施方案是从属权利要求的主题。
本发明涉及藉助于一个NOx传感器测定一台内燃机废气流的NOx浓度的方法,其中该传感器藉助于所选的工作点进行校准。最好精确采用一个选择的内燃机工作点。这样,就可对NOx传感器的特性偏差进行修正。此外,还可对NOx传感器的特性曲线的斜度进行修正。
此外,本发明还涉及设有一个位于废气流中的催化转化器和一个NOx传感器以及一个内燃机控制单元的稀薄燃烧的内燃机,其中NOx传感器的特性曲线采用本发明的方法进行修正。
以下根据附图说明本发明的优选实施方案。
图1所示为稀薄燃烧的燃油系统的原理示意图。
图2所示为传感器特性曲线的示意图。
图1以示意图方式示出稀薄燃烧的燃油系统。由内燃机管理系统2控制的稀薄燃烧的内燃机1在其废气流3中设有一个可选择的预催化转化器4和一个具有NOx存储器功能的催化转化器5。在催化转化器5之后的废气流动方向设有一个NOx传感器或兰姆达传感器(Lambda-Sensor)6,该传感器测量废气的NOx浓度并将其测量信号通过导线7传输给内燃机管理系统2。
如上所述,目前可以买到的NOx传感器6具有不同的特性曲线,根据不同的制造商,与NOx的实际值有不同的误差值。传感器6的特性曲线的这些误差至少在线性范围内有较多的原因,它们在偏移8的精度和精度9的斜度(灵敏性)方面可以加以区别。
图2所示为一只NOx传感器的特性曲线。任何单位的传感器输出信号OUT都是以ppm量化的NOx浓度的函数表示的。在重要范围内线性的特性曲线具有偏移8(坐标截距)和斜度9。
为了至少部分补偿偏移误差,可考虑发动机1的一个工作点(至少一个工作点),在这个工作点上,可以假设具有足够精度的催化转化器5之后的NOx浓度。由传感器6测得的NOx信号通过假设的NOx浓度进行修正。例如,在发动机1的熄火阶段可不考虑NOx浓度,这样,就可将这样一个发动机工作点用来校准NOx传感器6。
在催化转化器5涉及一种NOx存储催化转化器时,例如,还可以采用下列工作点进行校准:在催化转化器5的某一温度范围内,例如约350℃,即使对于一只严重损坏的中毒的催化转化器5来说,至少在某一时间内,例如在发动机1空转时预先进行一次NOx再生之后5~10秒钟,由于NOx的质量流低,所以几乎100%的NOx浓度沉积到催化转化器5中。因此在催化转化器5之后的NOx浓度的实际值在百万分之0~5之间。这样,这一时刻就可有利地用来校准NOx传感器6的特性曲线的偏移。
Claims (7)
1.藉助于一个NOx传感器(6)测定内燃机(1)废气流的NOx浓度的方法,其特征在于,传感器(6)藉助于所选择的工作点被校准。
2.按照权利要求1的方法,其特征在于,精确地采用一个选择的发动机工作点。
3.按照权利要求2的方法,其特征在于,采用一个发动机熄火阶段作为进行校准的工作点。
4.按照权利要求2的方法,其特征在于,在紧接着NOx存储催化转化器再生后的空转状态作为校准的工作点。
5.按照前述的权利要求之一的方法,其特征在于,NOx传感器(6)的特性曲线的偏移(8)被修正。
6.按照前述的权利要求之一的方法,其特征在于,NOx传感器(6)的特性曲线的斜度(9)被修正。
7.具有一个位于废气流(3)中的催化转化器(5)和一个NOx传感器(6)以及一个发动机控制单元(2)的稀薄燃烧的内燃机(1),采用按照前述权利要求之一的方法使传感器(6)的特性曲线被校正。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19911664.4 | 1999-03-16 | ||
DE1999111664 DE19911664A1 (de) | 1999-03-16 | 1999-03-16 | Kalibrierung eines NOx-Sensors |
Publications (2)
Publication Number | Publication Date |
---|---|
CN1343309A true CN1343309A (zh) | 2002-04-03 |
CN1222768C CN1222768C (zh) | 2005-10-12 |
Family
ID=7901152
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN 00805013 Expired - Fee Related CN1222768C (zh) | 1999-03-16 | 2000-02-28 | 测定内燃机废气流的NOx浓度的方法及一种内燃机 |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1163510A1 (zh) |
JP (1) | JP4535357B2 (zh) |
CN (1) | CN1222768C (zh) |
DE (1) | DE19911664A1 (zh) |
WO (1) | WO2000055614A1 (zh) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102733916A (zh) * | 2011-04-07 | 2012-10-17 | 通用汽车环球科技运作有限责任公司 | 车辆排气处理应用的NOx传感器的偏移和慢响应诊断方法 |
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 |
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 |
Families Citing this family (13)
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 |
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 |
DE102013209487B4 (de) * | 2013-05-22 | 2020-07-02 | Mtu Friedrichshafen Gmbh | Verfahren zum Betreiben einer Antriebseinrichtung sowie entsprechende Antriebseinrichtung |
JP6256240B2 (ja) | 2014-07-28 | 2018-01-10 | トヨタ自動車株式会社 | 内燃機関の制御装置 |
JP6398789B2 (ja) * | 2015-02-27 | 2018-10-03 | いすゞ自動車株式会社 | 診断装置 |
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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 EP EP00910727A patent/EP1163510A1/de not_active Ceased
- 2000-02-28 JP JP2000605195A patent/JP4535357B2/ja not_active Expired - Fee Related
- 2000-02-28 WO PCT/EP2000/001663 patent/WO2000055614A1/de active Application Filing
- 2000-02-28 CN CN 00805013 patent/CN1222768C/zh not_active Expired - Fee Related
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
CN102733916A (zh) * | 2011-04-07 | 2012-10-17 | 通用汽车环球科技运作有限责任公司 | 车辆排气处理应用的NOx传感器的偏移和慢响应诊断方法 |
CN102733916B (zh) * | 2011-04-07 | 2015-08-26 | 通用汽车环球科技运作有限责任公司 | 车辆排气处理应用的NOx传感器的偏移和慢响应诊断方法 |
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 |
Also Published As
Publication number | Publication date |
---|---|
EP1163510A1 (de) | 2001-12-19 |
JP2002539448A (ja) | 2002-11-19 |
WO2000055614A1 (de) | 2000-09-21 |
JP4535357B2 (ja) | 2010-09-01 |
DE19911664A1 (de) | 2000-09-21 |
CN1222768C (zh) | 2005-10-12 |
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