WO2003006931A2 - Verfahren zur kompensation der messabweichung eines luftmassensensors - Google Patents
Verfahren zur kompensation der messabweichung eines luftmassensensors Download PDFInfo
- Publication number
- WO2003006931A2 WO2003006931A2 PCT/DE2002/002464 DE0202464W WO03006931A2 WO 2003006931 A2 WO2003006931 A2 WO 2003006931A2 DE 0202464 W DE0202464 W DE 0202464W WO 03006931 A2 WO03006931 A2 WO 03006931A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sensor
- air
- measurement
- air mass
- characteristic
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/68—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using thermal effects
- G01F1/696—Circuits therefor, e.g. constant-current flow meters
- G01F1/698—Feedback or rebalancing circuits, e.g. self heated constant temperature flowmeters
- G01F1/6983—Feedback or rebalancing circuits, e.g. self heated constant temperature flowmeters adapted for burning-off deposits
-
- 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
- F02D41/18—Circuit arrangements for generating control signals by measuring intake air flow
- F02D41/187—Circuit arrangements for generating control signals by measuring intake air flow using a hot wire flow sensor
-
- 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
- F02D41/2438—Active learning methods
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/68—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using thermal effects
- G01F1/696—Circuits therefor, e.g. constant-current flow meters
- G01F1/6965—Circuits therefor, e.g. constant-current flow meters comprising means to store calibration data for flow signal calculation or correction
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/68—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using thermal effects
- G01F1/696—Circuits therefor, e.g. constant-current flow meters
- G01F1/698—Feedback or rebalancing circuits, e.g. self heated constant temperature flowmeters
- G01F1/6986—Feedback or rebalancing circuits, e.g. self heated constant temperature flowmeters with pulsed heating, e.g. dynamic methods
-
- 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
- F02D41/042—Introducing corrections for particular operating conditions for stopping the engine
Definitions
- the invention relates to a method for compensating the measurement deviation of an air mass sensor according to the preamble of patent claim 1.
- Air mass sensors are used to determine the air mass flow in flow channels and are used, for example, in vehicle technology to regulate the metering of combustion air and to be able to set an optimal air / fuel ratio.
- Air mass sensors include, for example, a measuring resistor that is heated up by a heating resistor and kept at a certain temperature or at a certain resistance value. In the operating state, the measuring resistor has an excess temperature that is far above the medium temperature. If the mass flow flowing through the flow channel changes, the temperature of the measuring resistor changes due to the changed convective heat transfer, which detunes a resistance measuring bridge. As a result, the heating power of the heating resistor changes. The heating power of the heating resistor or the voltage applied to the heating resistor are a measure of the flow mass of the flowing medium.
- the dirt build-up on the sensor causes a not inconsiderable characteristic drift of the air mass meter over the course of the engine's life, since the convective heat transfer is impaired by the dirt layer. As a result, incorrect measurements occur, which lead to non-ideal operation of the motor when a maximum permissible tolerance limit is exceeded. Soiled air mass meters had to be replaced when this tolerance limit was reached.
- the basic inventive idea is to apply a defined air blast to the air mass sensor and to evaluate the response time (impulse response). Since the response time from the thermal
- both the shift in the sensor characteristic and the change in the characteristic gradient are preferably taken into account.
- calculations are preferably carried out to compensate for the measurement deviation, for example predetermined mass flow values being assigned new measurement values (measurement voltages), or a The corresponding characteristic curve already stored in the system is selected.
- the deviation of the sensor characteristic of a dirty or aged sensor from that of a new sensor can e.g. determined on the basis of laboratory measurements and the result used to correct the sensor error.
- the response time is particularly the time that a temperature sensor of the air mass sensor needs to reach a certain temperature after being subjected to an air blast.
- the response time can also be the time that the output signal of the air mass sensor needs to reach a certain percentage of the full measurement signal after being subjected to an air blast.
- Air supply measured and used to compensate for the measurement error.
- the response times of a plurality of sensors of an air mass meter are determined in order to take account of dirt deposits of different thicknesses on the surface of the air mass meter.
- Results of the response time that differ greatly from one another can be calculated, for example, as an average.
- the measurement error is preferably corrected using software.
- a response time of the air mass meter is determined shortly after a motor vehicle is switched off.
- the engine is briefly started up from a low speed, such as 500 rpm.
- a correction calculation for the offset and the amplification of the characteristic curve is then carried out from the result of this measurement, or a characteristic curve already stored in the system is selected.
- the correction is finally taken into account when evaluating the air mass sensor output signal after the vehicle is restarted.
- Figure 1 shows an embodiment of an air mass sensor
- Figure 2 shows the change in the sensor characteristic due to contamination or aging.
- Figure 1 shows a possible implementation of a
- Air mass sensor 1 which is arranged on a carrier plate 2.
- the air mass sensor 1 consists of a me branch-like heating area 3, on which several resistors 5,6,7 are arranged, and a thicker edge area 4th
- the resistors 5,6,7 are part of a measuring bridge circuit which is tuned in the normal state.
- the resistor 6 is a measuring resistor that is heated by the heating area 3 underneath and is kept at a certain temperature or at a certain resistance value.
- Air mass sensor 1 and cools the heating area of the sensor depending on the flow rate and the air temperature. If the flow rate now changes, the temperature of the changes due to the changed convective heat transfer
- Measuring resistor 6 whereby the measuring bridge circuit is detuned. This leads to an increased heating of the measuring resistor 6.
- the heating power or the voltage applied to the heating element is a measure of the mass flow of the flowing medium.
- a temperature sensor 8 is provided on the outer edge region of the sensor 1.
- the reference number 9 denotes a layer of dirt which has deposited on the surface of the air mass sensor during operation and which causes a not inconsiderable characteristic drift of the air mass meter 1. This layer of dirt affects the convective
- FIG. 2 shows an output characteristic curve 10 of an air mass sensor 1 when new compared to a characteristic curve 11 of the sensor covered with a layer of dirt.
- the dirt application on the sensor causes a characteristic drift, which can lead to incorrect measurements. More specifically, the pollution causes both a shift in the characteristic curve (offset) and a reduction the reinforcement, so that the characteristic curve 11 of the dirty air mass meter is generally below that of a new air mass meter.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003512651A JP2004534248A (ja) | 2001-07-11 | 2002-07-05 | 空気質量センサの測定偏差を補償する方法 |
US10/483,311 US20040244461A1 (en) | 2001-07-11 | 2002-07-05 | Method for compensating the measurement deviation of an air-flow sensor |
EP02758075A EP1412707A2 (de) | 2001-07-11 | 2002-07-05 | Verfahren zur kompensation der messabweichung eines luftmassensensors |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10133526A DE10133526A1 (de) | 2001-07-11 | 2001-07-11 | Verfahren zur Kompensation der Messabweichung eines Luftmassensensors |
DE10133526.1 | 2001-07-11 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2003006931A2 true WO2003006931A2 (de) | 2003-01-23 |
WO2003006931A3 WO2003006931A3 (de) | 2003-05-30 |
Family
ID=7691305
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2002/002464 WO2003006931A2 (de) | 2001-07-11 | 2002-07-05 | Verfahren zur kompensation der messabweichung eines luftmassensensors |
Country Status (5)
Country | Link |
---|---|
US (1) | US20040244461A1 (de) |
EP (1) | EP1412707A2 (de) |
JP (1) | JP2004534248A (de) |
DE (1) | DE10133526A1 (de) |
WO (1) | WO2003006931A2 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10320365A1 (de) * | 2003-05-07 | 2004-12-16 | Maschinenfabrik Georg Kiefer Gmbh | Kühldecke bzw. Kühlsegel mit Speicherfähigkeit |
WO2007063110A1 (de) * | 2005-12-01 | 2007-06-07 | Endress+Hauser Flowtec Ag | Thermische vorrichtung zur bestimmung und/oder überwachung des massedurchflusses eines fluiden mediums |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10316294B4 (de) * | 2003-04-09 | 2006-06-14 | Siemens Ag | Verfahren zur Steuerung/Regelung einer Klimaanlage für ein Kraftfahrzeug |
DE102004024536A1 (de) * | 2004-05-18 | 2005-12-15 | Robert Bosch Gmbh | Verfahren zum Betrieb eines Systems |
FR2885216B1 (fr) * | 2005-05-02 | 2007-07-27 | Peugeot Citroen Automobiles Sa | Systeme de determination de l'etat d'encrassement d'un debitmetre impulsionnel pour vehicule automobile |
DE102005025884A1 (de) * | 2005-06-06 | 2006-12-07 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Korrektur eines Signals eines Sensors |
DE102006010710B4 (de) * | 2006-03-08 | 2009-03-19 | Audi Ag | Verfahren zur Luftmassenermittlung bei Brennkraftmaschinen |
DE102006029215A1 (de) * | 2006-06-26 | 2008-01-03 | Robert Bosch Gmbh | Messvorrichtung zur Messung der Durchflußrate eines Verbrennungsgas-Gemisches, aufweisend eine Korrektureinrichtung |
US8617787B2 (en) * | 2009-02-20 | 2013-12-31 | San-Apro, Ltd. | Sulfonium salt, photo-acid generator, and photosensitive resin composition |
JP6020061B2 (ja) * | 2012-11-12 | 2016-11-02 | トヨタ自動車株式会社 | 内燃機関の制御装置 |
DE102016202803B3 (de) * | 2016-02-24 | 2017-08-17 | Continental Automotive Gmbh | Verfahren zum Ermitteln einer Luftmasse in einer Brennkraftmaschine |
CN105823502B (zh) * | 2016-03-14 | 2018-06-19 | 深圳怡化电脑股份有限公司 | 一种传感器老化补偿电路及其方法 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3910676A1 (de) * | 1989-04-03 | 1990-10-04 | Pierburg Gmbh | Verfahren und einrichtung zum betreiben eines luftmassenstrommessers |
EP0589211A2 (de) * | 1992-09-23 | 1994-03-30 | Pierburg Gmbh | Steuer- und Auswerteschaltung für einen Luftmassenstromsensor |
WO1999006800A1 (en) * | 1997-07-29 | 1999-02-11 | Gascontrol B.V. | Gasmeter |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR930004080B1 (ko) * | 1989-02-14 | 1993-05-20 | 미쯔비시 덴끼 가부시끼가이샤 | 열식 유량 감지기의 신호 처리방법 |
US5235527A (en) * | 1990-02-09 | 1993-08-10 | Toyota Jidosha Kabushiki Kaisha | Method for diagnosing abnormality of sensor |
DE10000496A1 (de) * | 2000-01-08 | 2001-07-12 | Bosch Gmbh Robert | Gasströmungs-Bestimmungsverfahren und -vorrichtung |
-
2001
- 2001-07-11 DE DE10133526A patent/DE10133526A1/de not_active Withdrawn
-
2002
- 2002-07-05 US US10/483,311 patent/US20040244461A1/en not_active Abandoned
- 2002-07-05 WO PCT/DE2002/002464 patent/WO2003006931A2/de active Application Filing
- 2002-07-05 JP JP2003512651A patent/JP2004534248A/ja active Pending
- 2002-07-05 EP EP02758075A patent/EP1412707A2/de not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3910676A1 (de) * | 1989-04-03 | 1990-10-04 | Pierburg Gmbh | Verfahren und einrichtung zum betreiben eines luftmassenstrommessers |
EP0589211A2 (de) * | 1992-09-23 | 1994-03-30 | Pierburg Gmbh | Steuer- und Auswerteschaltung für einen Luftmassenstromsensor |
WO1999006800A1 (en) * | 1997-07-29 | 1999-02-11 | Gascontrol B.V. | Gasmeter |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10320365A1 (de) * | 2003-05-07 | 2004-12-16 | Maschinenfabrik Georg Kiefer Gmbh | Kühldecke bzw. Kühlsegel mit Speicherfähigkeit |
DE10320365B4 (de) * | 2003-05-07 | 2005-10-27 | Maschinenfabrik Georg Kiefer Gmbh | Kühldecke bzw. Kühlsegel mit Speicherfähigkeit |
WO2007063110A1 (de) * | 2005-12-01 | 2007-06-07 | Endress+Hauser Flowtec Ag | Thermische vorrichtung zur bestimmung und/oder überwachung des massedurchflusses eines fluiden mediums |
Also Published As
Publication number | Publication date |
---|---|
WO2003006931A3 (de) | 2003-05-30 |
US20040244461A1 (en) | 2004-12-09 |
JP2004534248A (ja) | 2004-11-11 |
DE10133526A1 (de) | 2003-01-30 |
EP1412707A2 (de) | 2004-04-28 |
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