EP3155251A1 - Verfahren zur auswertung der abweichung einer kennlinie - Google Patents
Verfahren zur auswertung der abweichung einer kennlinieInfo
- Publication number
- EP3155251A1 EP3155251A1 EP15726131.4A EP15726131A EP3155251A1 EP 3155251 A1 EP3155251 A1 EP 3155251A1 EP 15726131 A EP15726131 A EP 15726131A EP 3155251 A1 EP3155251 A1 EP 3155251A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- deviation
- lambda
- characteristic
- correction
- probe
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000012937 correction Methods 0.000 claims abstract description 38
- 239000000523 sample Substances 0.000 claims description 44
- 238000006243 chemical reaction Methods 0.000 claims description 19
- 238000002485 combustion reaction Methods 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 9
- 230000001960 triggered effect Effects 0.000 claims description 9
- 239000000446 fuel Substances 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 5
- 230000003197 catalytic effect Effects 0.000 claims description 2
- 239000003344 environmental pollutant Substances 0.000 abstract description 6
- 231100000719 pollutant Toxicity 0.000 abstract description 6
- 239000007789 gas Substances 0.000 description 16
- 230000000694 effects Effects 0.000 description 5
- 239000003054 catalyst Substances 0.000 description 4
- 230000007257 malfunction Effects 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009429 electrical wiring Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000003679 aging effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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
- F02D41/02—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
- F02D41/1444—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
-
- 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
- F02D41/1455—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 resistivity varying with oxygen 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
- F02D41/02—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
- F02D41/1495—Detection of abnormalities in the air/fuel ratio feedback 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
- F02D41/24—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
-
- 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
- F02D41/2454—Learning of the air-fuel ratio control
-
- 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
Definitions
- the invention relates to a device for evaluating the deviation of at least one region of a characteristic of an exhaust gas duct of an internal combustion engine arranged exhaust gas sensor of reference values, wherein a control device is provided, and wherein in the control device, a program sequence or a circuit is provided.
- Exhaust gas aftertreatment exhaust gas sensors used such as
- Two-point and / or broadband lambda probes and / or NO x sensors Optimization requires that the measured quantities are determined reliably and accurately via the sensors.
- a decisive factor here is the clear relationship between a physically measured variable and the one to determining measured variable, which is usually present over a characteristic.
- the two-point lambda probe usually differs substantially between rich exhaust gas ( ⁇ ⁇ 1) during operation of the
- this has the disadvantage that in operating modes for which a lean or rich air-fuel mixture is necessary (for example catalyst diagnosis or component protection), the target lambda can only be adjusted in a precontrolled manner, but can not be regulated.
- From DE 10 2010 211 687 AI is a method for detecting a
- Deviation and from DE 10 2012 211 683 AI a method for correcting a lambda characteristic of a arranged in an exhaust passage of an internal combustion engine two-point lambda probe relative to a corresponding Reference lambda characteristic known.
- it describes how a constant characteristic curve offset or a temperature-dependent deviation of the actual lambda characteristic curve of a two-point probe upstream of the catalytic converter from the reference lambda characteristic curve can be detected and compensated.
- a continuous lambda control with a two-point lambda probe is possible.
- the invention is therefore based on the object to provide a robust method for characteristic correction to ensure reliable pollutant optimization, and an apparatus for performing such
- the object of the invention relating to the method is solved by specifying at least one threshold for the assessment of the deviation, which constitutes a criterion for the distinction between a tolerable and an intolerable correction requirement.
- the application of the criterion allows a differentiated reaction by different measures.
- Reference value Also, it can be absolute or relative.
- the exhaust gas sensor is a lambda probe, in particular a two-point lambda probe, if the characteristic curve is a lambda characteristic curve and if the reference values are taken from a reference lambda characteristic curve.
- the application of the method according to the invention with respect to a lambda, in particular a two-point lambda probe allows the more reliable use of such a probe for emission-optimized control of the engine combustion process.
- Close reference value for example, a method involving the heating power and / or another, in particular a resistance temperature characteristic of the lambda probe. Such methods may be different
- a deviation can be evaluated if the at least one threshold delimits a plausibility range from an area outside the plausibility range.
- the at least one threshold and thus the plausibility range are set flexibly. It makes sense, for example, a definition according to the tolerances of a faultless exhaust gas sensor.
- the goal is that the deviation is compared with the threshold, wherein the deviation within the plausibility range is assessed as a tolerable correction requirement and the deviation outside the plausibility range as a non-tolerable correction requirement.
- a response adapted to the case of need can be achieved by correcting the deviation given a tolerable correction requirement, and by determining a non-tolerable correction requirement
- Corrective action which would have a negative rather than positive effect, be intercepted and replaced by more appropriate measures. Corrective action, which would not be feasible to the extent necessary, can be replaced by other reactions.
- the other reaction is triggered depending on the diagnosed cause. In particular, she will then triggered when a temperature offset detection on a significantly too cold
- Temperature offset detection indicates a significantly high temperature of the two-point lambda probe or an implausibly high positive voltage offset is detected or an implausibly high negative voltage offset is detected.
- another reaction is particularly useful because the necessary corrections may not be feasible, or there is a high probability of another known but not immediately correctable cause of the deviation.
- the probe temperature is significantly too low or too high, the probe element temperature would have to be increased implausibly as a corrective measure, for which reason the heating power might be reduced. is not available, or it would have to be lowered, which u.U. not possible.
- a non-tolerable correction requirement arises, for example, when the temperature is more than -50 K to +0 K relative to the nominal temperature of the probe, e.g.
- the correction to a threshold malfunction should be avoided, eg damage to the exhaust gas sensor by overheating.
- the limitation of the correction to a substitute value is provided in particular for the case when a complete correction is not possible and a correction to the threshold obscure the deviation outside the plausibility range in particular for other diagnostic units, so that the exhaust gas sensor would not, for example, be displayed as faulty, although it would be required.
- the replacement value can also mean that no correction is made.
- the method according to the invention can be used particularly purposefully if different other reactions are triggered, depending on how far the deviation lies outside the plausibility range and / or that different other reactions are triggered depending on the cause of the deviation from the plausibility range.
- the object of the invention relating to the device is achieved in that at least one reference value and one comparison step are predetermined in the program sequence or in the circuit, in which the determined deviation is compared with the at least one reference value, and the control device either one depending on the comparison result Correcting the deviation or triggering another reaction.
- An expedient area of use of the device is when the exhaust gas sensor a
- 1 shows a voltage lambda diagram of a two-point lambda probe
- FIG. 1 shows a voltage lambda diagram 10 of a two-point lambda probe, with a voltage axis 11 and a lambda axis 12.
- the reference lambda characteristic curve 15 has a fat region 13 ( ⁇ ⁇ 1) and a lean region 14 ( ⁇ > 1), where at ⁇
- FIG. 1 shows a lambda characteristic curve
- the voltage 170 real corresponds to the actual lambda 172 instead of the reference lambda 171, which differs by a deviation 18.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014211069.6A DE102014211069A1 (de) | 2014-06-11 | 2014-06-11 | Verfahren zur Auswertung der Abweichung einer Kennlinie |
PCT/EP2015/061962 WO2015189052A1 (de) | 2014-06-11 | 2015-05-29 | Verfahren zur auswertung der abweichung einer kennlinie |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3155251A1 true EP3155251A1 (de) | 2017-04-19 |
EP3155251B1 EP3155251B1 (de) | 2020-11-25 |
Family
ID=53276130
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15726131.4A Active EP3155251B1 (de) | 2014-06-11 | 2015-05-29 | Verfahren zur auswertung der abweichung einer kennlinie |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3155251B1 (de) |
CN (1) | CN106471238B (de) |
DE (1) | DE102014211069A1 (de) |
WO (1) | WO2015189052A1 (de) |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62175657A (ja) * | 1986-01-30 | 1987-08-01 | Fujikura Ltd | 気体濃度測定方法 |
DE3840148A1 (de) * | 1988-11-29 | 1990-05-31 | Bosch Gmbh Robert | Verfahren und vorrichtung zum erkennen eines fehlerzustandes einer lambdasonde |
KR940004344B1 (ko) * | 1990-07-10 | 1994-05-23 | 미쯔비시지도오샤고오교오 가부시기가이샤 | 공연비 제어장치 |
DE4243493A1 (de) * | 1992-12-22 | 1994-06-23 | Bosch Gmbh Robert | Verfahren und Vorrichtung zur Überwachung einer Steuereinrichtung |
DE10258426B4 (de) * | 2002-12-13 | 2008-08-21 | Siemens Ag | Verfahren und Vorrichtung zum Überwachen einer Steuereinrichtung einer Brennkraftmaschine |
DE102004025156B3 (de) * | 2004-05-21 | 2005-07-21 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Verfahren zur Fehlerkorrektur eines Wegsensorsignals |
DE102010046954B4 (de) * | 2010-09-29 | 2012-04-12 | Robert Bosch Gmbh | Verfahren zur Kalibrierung, Validierung und Justierung einer Lambdasonde |
DE102010063119A1 (de) * | 2010-12-15 | 2012-06-21 | Robert Bosch Gmbh | Verfahren zur Regelung und Adaption eines Luft-/Kraftstoffgemischs in einem Verbrennungsmotor |
DE102011013392A1 (de) * | 2011-03-09 | 2012-09-13 | Daimler Ag | Verfahren zur Regelung eines Verbrennungsmotors |
DE102012211683B4 (de) * | 2012-07-05 | 2024-03-21 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Korrektur einer Kennlinie einer Zweipunkt-Lambdasonde |
US9057338B2 (en) * | 2012-11-09 | 2015-06-16 | GM Global Technology Operations LLC | Exhaust gas oxygen sensor fault detection systems and methods using fuel vapor purge rate |
DE102012221552A1 (de) * | 2012-11-26 | 2014-05-28 | Robert Bosch Gmbh | Verfahren und Vorrichtung zum Betrieb eines Abgassensors |
-
2014
- 2014-06-11 DE DE102014211069.6A patent/DE102014211069A1/de not_active Withdrawn
-
2015
- 2015-05-29 WO PCT/EP2015/061962 patent/WO2015189052A1/de active Application Filing
- 2015-05-29 EP EP15726131.4A patent/EP3155251B1/de active Active
- 2015-05-29 CN CN201580030958.8A patent/CN106471238B/zh active Active
Also Published As
Publication number | Publication date |
---|---|
CN106471238A (zh) | 2017-03-01 |
WO2015189052A1 (de) | 2015-12-17 |
DE102014211069A1 (de) | 2015-12-17 |
CN106471238B (zh) | 2020-09-22 |
EP3155251B1 (de) | 2020-11-25 |
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