EP2475981A1 - Sondenstecker für abgassonde - Google Patents
Sondenstecker für abgassondeInfo
- Publication number
- EP2475981A1 EP2475981A1 EP10739568A EP10739568A EP2475981A1 EP 2475981 A1 EP2475981 A1 EP 2475981A1 EP 10739568 A EP10739568 A EP 10739568A EP 10739568 A EP10739568 A EP 10739568A EP 2475981 A1 EP2475981 A1 EP 2475981A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- probe
- exhaust gas
- aging
- data
- exhaust
- 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- Withdrawn
Links
Classifications
-
- 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
- G01N27/403—Cells and electrode assemblies
- G01N27/406—Cells and probes with solid electrolytes
- G01N27/4062—Electrical connectors associated therewith
-
- 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
- G01N27/403—Cells and electrode assemblies
- G01N27/406—Cells and probes with solid electrolytes
- G01N27/4065—Circuit arrangements specially adapted therefor
-
- 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
-
- 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
-
- 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
- F02D41/1494—Control of sensor heater
-
- 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
- F02D41/2432—Methods of calibration
- F02D41/2435—Methods of calibration characterised by the writing medium, e.g. bar code
-
- 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
-
- 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
- G01N27/403—Cells and electrode assemblies
- G01N27/406—Cells and probes with solid electrolytes
- G01N27/407—Cells and probes with solid electrolytes for investigating or analysing gases
-
- 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
-
- 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
Definitions
- the invention relates to an exhaust gas probe for measuring properties of the exhaust gas of internal combustion engines and a method for operating such an exhaust gas probe.
- Such exhaust gas sensors are, for example, concentration probes, for example oxygen concentration sensors, also called lambda probes, as they emerge, for example, from the book publication Bosch Automotive Handbook, 25th Edition 2003, pages 133 ff. Further, such probes may include exhaust temperature probes, gas selective exhaust probes, e.g. Measure ammonia or nitrogen oxide levels, hydrocarbon sensors, and particle mass or particle number sensors, e.g. Soot sensors, be.
- These probes must be calibrated, i. design-related tolerances must be compensated. This can be done, for example, by a trimming process on the sensor element, for example by applying a heating resistor, i. a desired function value is set to a target value.
- probes are adjusted accordingly, they are connected by means of a plug to a motor control unit, which reads out and processes the data detected by the probe.
- matching elements in the plug of the probe, for example to provide a trimming resistor which is adjusted by means of a laser beam and which is connected in such a way that it forms part of a current divider in an evaluation circuit in the control unit.
- a laser alignment in the sensor element even with an exposed diffusion barrier or to abrade the diffusion barrier at its outer edges and the like.
- the object of the invention is therefore to provide an exhaust gas probe, in which not only both aging-related changes in their properties and, for example due to poisoning and deposition effects caused changes are compensated, but also in the probe-specific properties that are due, for example, due to their production, can be considered.
- an exhaust gas probe for measuring properties of the exhaust gas of internal combustion engines in that in a probe associated circuit, in particular in a probe plug or a connecting element corresponding thereto, a data storage unit is arranged, in which the properties characterizing the probe and / or adaptation functions are stored.
- the invention is further achieved by a method for operating such an exhaust gas probe, in which at least one of the properties characterizing the probe and / or adaptation functions is stored in at least one data of the memory unit associated with the probe.
- the switch-off state in particular data which characterizes the performance of an interval measurement for the regeneration of the exhaust gas probe or a wake, and / or
- the basic idea of the invention is to make no adjustment of, for example, production-related scattering of the probe properties, but to accept this scattering to a certain extent and to record the probe in accordance with characterizing properties and deposit it in the plug or in a corresponding connecting element of the probe, then these values later to be able to take into account in the control unit of the internal combustion engine.
- adaptation functions are stored in the plug or connecting element of the exhaust gas probe, which enable a compensation of changes over a period of the probe properties, for example aging drifts, drifts due to symptoms of intoxication and the like. It is thus possible both to compensate for production-related variations and to compensate for aging-related changes.
- the recording of the operating parameters of the probe for an elapsed predeterminable period of time can to a certain extent be regarded as a "write-on" so "write-on” means continuous recording and storage in the memory unit in the probe plug or the connecting element. In this way, a continuous adaptation and a quasi-continuous calibration of the probe is possible.
- the data stored in the storage unit is transmitted in digital form to the control unit and processed by the latter.
- the properties characterizing the probe and / or the adaptation functions comprise a characteristic library and at least one, preferably a plurality of different, aging factors characterizing the aging of the probe.
- the aging factors include both a temperature-influenced aging as well as a poisoning-influenced aging of the probe.
- One or more of the following variables are provided for a compensation of the temperature-influenced aging: the heater operating time,
- the time in which the exhaust gas probe has exceeded at least a predefinable threshold temperature is preferably provided: the time period during which the internal combustion engine is switched on;
- the suitable characteristic curves can be selected from the characteristic library.
- FIG. 1 shows schematically an internal combustion engine with an exhaust gas probe according to the invention
- FIG. 2 a shows schematically an aging-related characteristic drift
- Fig. 3 shows schematically an adaptation function of a probe characteristic.
- an internal combustion engine 100 is shown schematically, in the exhaust passage 1 10 an exhaust gas probe 120 is arranged, which is connected via a connecting line 121 via a probe plug 130, the plug contacts 137, connected to a control unit 140, wherein the control unit 140 is a corresponding comprises plug socket 142 adapted to the plug contacts 137, the plug contacts 147 has.
- the plug 130 has a memory unit 135 in which characteristics and adaptation functions characterizing the exhaust gas probe 120 to be described below are stored and stored.
- a compensation of the new value can be made by not - as known from the prior art - manufacturing-related fluctuations of heater resistances or function values are corrected by a trim process, but that function-related new values of the exhaust gas probe within larger tolerances uncorrected are stored in the data storage unit 135 in the connector and the compensation by compensation functions in the control unit 140 is made.
- compensation for probe aging can be made by having relevant parameters that significantly affect the aging of the probe, e.g. the operating time during which the probe 120 is above a defined temperature, continuously detected and stored in the data storage unit 135 in the plug 130.
- the number of operating hours can be stored in the data storage unit 135.
- the operating parameters that are measured and recorded within an elapsed predefined time period, for example within the last two minutes, can be stored. This allows a simplified troubleshooting when reported as defective probes.
- the switch-off state can be stored with, for example, whether an interval regeneration of the probe 120 has already been performed, or a necessary follow-up already
- the data storage unit 135 in the plug 130 moreover has the advantage that data can be imported that enable the probe operation with another control unit 140.
- the data stored in the plug 130 in the storage unit 135 in this way enables a controller-specific characteristic adaptation This is also to be understood as an "adaptation function". This is particularly advantageous in the case of a retrofit or in the case of an exchange of the probe 120. that the arrangement of the memory unit 135 in the plug 130 is much more cost-effective than a calibration, for example by means of a laser beam.
- control unit 140 and plug 130 only data lines or contacts are required, so that additional connection lines for a power divider, as required for example in the case of a resistor in the plug, can be omitted.
- a so-called characteristic library and at least one aging factor are stored in the memory unit 135 in the plug 130.
- An essential aspect of the invention is that an "interaction" between the characteristic library and the at least one aging factor during operation of the probe 120 and thus during operation of the internal combustion engine 100 can be made.
- the characteristic library can be stored, for example, as a family of characteristics, as shown schematically in FIG. 2 a as age-related characteristic drift.
- the family of characteristics of a signal S changes over time, as illustrated by curves 201, 202, 203, 204.
- Such a family of characteristics may, for example, also represent the age-related drift of the heater resistance of the sensor element, as illustrated by the curves 21 1, 212, 213, 214 characterizing the heater resistance R H above the temperature T in FIG. 2 b.
- Such a family of characteristics shows functional characteristics of the sensor 120 in the new state and in intermediate stages in aged states (see Fig. 2a). These values may vary due to production. Also, aging over the lifetime, as shown for example by the resistance drift of an integrated heater or the integrated Nernst cell over the life of the probe in Fig. 2b, may occur.
- the aging factors can be one or more measured variables which are known to exert a particularly strong influence on the characteristic drift (see FIGS. 2a, 2b) of the exhaust gas probe 120.
- the correlation between the characteristic curve library and the aging factor is achieved by switching over to a more aged characteristic in the characteristic library or switching to a larger correction value whenever predefined and preset limits of the aging factor are exceeded
- Fig. 3 explains where the probe signal S 'of an aged probe is shown on the right in the area marked with I.
- the probe signal S of a new probe is shown on the left in the area denoted by 2.
- the characteristic curve S' of the aged probe becomes characteristic S of the new probe, which means the so-called "switching" above.
- a temperature-related or poisoning-related probe aging is usually not split into individual mechanisms, but both phenomena occur together and act together.
- Another essential feature of the exhaust gas sensor according to the invention consists in a "write-down" of operating conditions, which exert a particularly great influence on the aging (characteristic / heater drift) of the probe via one or more mechanisms
- These operating conditions can be the duration of the probe depending on the type of probe the sensor system is exposed to particularly high temperatures or, for example, the combination of a high temperature with a rich gas atmosphere in certain other gas sensors and the like.
- the consecutively written, ie recorded and stored aging factors can accordingly comprise the following measured variables:
- temperature-influenced aging the time period during which the probe 120 is switched on (the heater operating time) or the integral of the heater operating power or the time during which the probe 120 has been exposed to a temperature greater than a predefinable threshold temperature, for example greater than 800 ° C. or, as it were, staggered a first period of time during which the probe 120 was at a temperature greater than a predetermined first temperature, for example greater than 400 ° C, and then a second period of time during which the probe 120 was exposed to a temperature greater than a predetermined second Temperature, for example 800 ° C.
- the following quantities can be distinguished: the time during which the internal combustion engine of the vehicle was switched on, the time during which the probe was exposed to lean or rich gas, or the number of regeneration cycles in the exhaust system.
- the data set of these aging factors is stored in the memory device 135 of the probe plug 130.
- the characteristic library is also stored in the memory 135 in the plug 130, it can be purely in principle but also stored in the control unit 140.
- the control unit 140 can be provided that, in particular in the case of broadband lambda sensors for compensation, not only the characteristic gradient, but also an offset and the characteristic curve, in particular in the lean load, and, preferably separately, the slope of the lean load and the rich load are stored. This is most advantageously done with a completely stored family of the entire characteristic curve in the memory unit 135 of the plug 130.
- it can be provided to convert the determined operating time directly into the characteristic change expected for the respective probe type.
- the above-mentioned "write-on" only detects the operation times during which exceeding of a limit value, for example, pure lean operation hours or hot operation are detected and used for the characteristic correction in the control unit 140.
- computing units may be provided in the plug 130 communicating with the storage unit 135.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Pathology (AREA)
- Molecular Biology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Measuring Oxygen Concentration In Cells (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009029384 | 2009-09-11 | ||
DE102010002458A DE102010002458A1 (de) | 2009-09-11 | 2010-03-01 | Abgassonde |
PCT/EP2010/060888 WO2011029661A1 (de) | 2009-09-11 | 2010-07-27 | Sondenstecker für abgassonde |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2475981A1 true EP2475981A1 (de) | 2012-07-18 |
Family
ID=43603573
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10739568A Withdrawn EP2475981A1 (de) | 2009-09-11 | 2010-07-27 | Sondenstecker für abgassonde |
Country Status (6)
Country | Link |
---|---|
US (1) | US9234869B2 (de) |
EP (1) | EP2475981A1 (de) |
JP (1) | JP5296928B2 (de) |
CN (1) | CN102483387B (de) |
DE (1) | DE102010002458A1 (de) |
WO (1) | WO2011029661A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103867270A (zh) * | 2012-12-17 | 2014-06-18 | 福特汽车萨纳伊股份有限公司 | 排气系统 |
DE102016202854A1 (de) * | 2016-02-24 | 2017-08-24 | Volkswagen Aktiengesellschaft | Verfahren und Vorrichtung zum Betreiben einer Lambdasonde in einem Abgaskanal einer Brennkraftmaschine |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006053808A1 (de) * | 2006-11-15 | 2008-05-21 | Robert Bosch Gmbh | Verfahren zur Bestimmung der Temperatur eines Messfühlers |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4128385A1 (de) * | 1991-08-27 | 1993-03-04 | Bosch Gmbh Robert | Verfahren und vorrichtung zur ueberwachung der funktionsfaehigkeit einer sauerstoffmesssonden-heizung |
DE19545706C2 (de) * | 1995-12-07 | 1999-07-15 | Mannesmann Vdo Ag | Verfahren zur Kalibrierung einer Lambdasonde in einer Brennkraftmaschine |
JP3304766B2 (ja) * | 1996-06-24 | 2002-07-22 | トヨタ自動車株式会社 | 空燃比センサのヒータ制御装置 |
US6254750B1 (en) * | 1997-07-29 | 2001-07-03 | Ecm Engine Control And Monitoring | Exhaust emission sensors |
DE19836127A1 (de) * | 1998-08-10 | 2000-02-24 | Siemens Ag | Verfahren und Vorrichtung zum Kalibrieren eines Sondensystems, bestehend aus einer Abgassonde und einer Regelschaltung für ein Kraftfahrzeug |
JP4153113B2 (ja) | 1998-12-04 | 2008-09-17 | 株式会社デンソー | ガス濃度検出装置 |
DE19963936A1 (de) * | 1999-12-31 | 2001-07-12 | Bosch Gmbh Robert | Verfahren zum Betreiben einer Brennkraftmaschine insbesondere eines Kraftfahrzeugs |
JP3833467B2 (ja) * | 2000-11-22 | 2006-10-11 | 三菱電機株式会社 | 排ガスセンサの劣化検出装置 |
DE10344262A1 (de) * | 2003-09-23 | 2005-04-14 | Endress + Hauser Conducta Gesellschaft für Mess- und Regeltechnik mbH + Co. KG | Steckmodul für einen Flüssigkeits- oder Gassensor |
US7036351B2 (en) * | 2004-04-28 | 2006-05-02 | Delphi Technologies, Inc. | Compensated open-loop control of oxygen sensor heater |
DE102007042086B4 (de) * | 2007-09-05 | 2014-12-24 | Continental Automotive Gmbh | Testverfahren für eine Abgassonde einer Brennkraftmaschine, insbesondere für eine Lambda-Sonde |
DE102008001121A1 (de) * | 2008-04-10 | 2009-10-15 | Robert Bosch Gmbh | Verfahren zur Diagnose einer im Abgassystem einer Brennkraftmaschine angeordneten Abgassonde und Vorrichtung zur Durchführung des Verfahrens |
DE102008042549B4 (de) * | 2008-10-01 | 2018-03-22 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Diagnose einer Abgassonde |
-
2010
- 2010-03-01 DE DE102010002458A patent/DE102010002458A1/de not_active Withdrawn
- 2010-07-27 CN CN201080040443.3A patent/CN102483387B/zh not_active Expired - Fee Related
- 2010-07-27 EP EP10739568A patent/EP2475981A1/de not_active Withdrawn
- 2010-07-27 JP JP2012527262A patent/JP5296928B2/ja not_active Expired - Fee Related
- 2010-07-27 WO PCT/EP2010/060888 patent/WO2011029661A1/de active Application Filing
- 2010-07-27 US US13/395,563 patent/US9234869B2/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006053808A1 (de) * | 2006-11-15 | 2008-05-21 | Robert Bosch Gmbh | Verfahren zur Bestimmung der Temperatur eines Messfühlers |
Also Published As
Publication number | Publication date |
---|---|
CN102483387A (zh) | 2012-05-30 |
CN102483387B (zh) | 2015-09-16 |
WO2011029661A1 (de) | 2011-03-17 |
US20120173163A1 (en) | 2012-07-05 |
JP2013503998A (ja) | 2013-02-04 |
DE102010002458A1 (de) | 2011-03-24 |
JP5296928B2 (ja) | 2013-09-25 |
US9234869B2 (en) | 2016-01-12 |
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