EP1356198A1 - Verfahren und vorrichtung zur ermittlung des durchsatzes eines strömenden mediums - Google Patents
Verfahren und vorrichtung zur ermittlung des durchsatzes eines strömenden mediumsInfo
- Publication number
- EP1356198A1 EP1356198A1 EP01271494A EP01271494A EP1356198A1 EP 1356198 A1 EP1356198 A1 EP 1356198A1 EP 01271494 A EP01271494 A EP 01271494A EP 01271494 A EP01271494 A EP 01271494A EP 1356198 A1 EP1356198 A1 EP 1356198A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- air mass
- throughput
- flowing medium
- determining
- temperature
- 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
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
- F02D41/18—Circuit arrangements for generating control signals by measuring intake air flow
-
- 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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/18—Circuit arrangements for generating control signals by measuring intake air flow
- F02D41/182—Circuit arrangements for generating control signals by measuring intake air flow for the control of a fuel injection device
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2400/00—Control systems adapted for specific engine types; Special features of engine control systems not otherwise provided for; Power supply, connectors or cabling for engine control systems
- F02D2400/08—Redundant elements, e.g. two sensors for measuring the same parameter
Definitions
- the invention relates to a method and a device for determining the throughput of a flowing medium, in particular for determining the air flow prevailing in the intake manifold of an internal combustion engine and thus for determining the intake air mass.
- Hot film air mass meters are usually used to record the air mass sucked in by an internal combustion engine. These have a heatable element which is exposed to the air flow to be measured and is cooled by it.
- Both types of air mass meter, or an existing method for detecting the air mass flow with a hot film air mass meter is based on the measurement of the heat that is given off to the air mass flow flowing past. For this purpose, the electrical energy required to regulate the hot film to a constant temperature is measured in a type of air mass meter.
- a second method, or a second associated one Sensor arrangement is based on the fact that the hot film is also regulated to a constant temperature.
- the heating power required is not used as the measurement signal, but rather the temperature profile at the edge of the hot film formed as a membrane.
- the temperature difference between these two points is determined using an upstream and a downstream temperature sensor. Both temperature sensors, which are designed as temperature-dependent resistors, are part of a bridge circuit. A measuring signal is obtained from the resulting bridge voltage, which represents the temperature difference between the upstream and the downstream temperature-dependent resistance.
- Both types of sensors, or evaluation methods can be impaired by interference effects, such as air humidity or pollution. This can lead to a false display of such a sensor or an error in the signal evaluation.
- the object of the invention is to minimize the sources of error mentioned and the resulting false indications.
- the object is achieved with a method and / or a device according to the invention for determining the throughput of a flowing medium with the features of claim 1.
- the method according to the invention and / or the device according to the invention for determining the throughput of a flowing medium, in particular that of an internal combustion engine sucked air mass has the advantage that interference effects are compensated for during the measurement.
- This is advantageously carried out by carrying out a redundant measurement which works according to two different methods, which are carried out with a single sensor, or there are two different types of sensors for measuring the air mass, it being essential that the two selected methods or the two sensors react differently to interference effects.
- the combination of the two measurement results can then be used to compensate for interference effects which occur more in one method or the associated sensor than in the other method or in the other sensor.
- DE-OS 39 25 377 proposes a method for correcting measurement errors, in which the measurement error of a hot-film air mass meter that occurs due to backflow is compensated.
- the air mass is recorded with the hot-film air mass meter as a first value and the air mass is calculated as a second value according to a method that works independently thereof, by evaluating the throttle valve angle and the speed of the internal combustion engine.
- Which value is used to actually determine the air mass depends on the operating range in which the internal combustion engine is located. Since the two values have different safeties in different operating ranges of the internal combustion engine, a correction signal can be obtained from the comparison of the two measured variables, which is taken into account to increase the measuring certainty.
- the air mass flow LS to be measured is determined according to two different methods, both of which work with the same sensor 13, which comprises a heatable hot film.
- the sensor 13 is constructed in such a way that it is suitable for both measuring methods and is exposed to the flowing air mass flow LS which cools it.
- the evaluation process which takes place in block 10, represents a first type of evaluation process and is based on the measurement of the heat that is emitted to the air mass flow flowing past the sensor.
- the heat which is given off to the air mass flow flowing past is determined by measuring the electrical energy which is required to regulate the hot film to a constant temperature. Ultimately, the heating output is measured and the air mass flow is determined from it.
- the second type of detection of the air mass flow or the second evaluation process takes place in block 12 and is carried out by evaluating the temperature profile.
- the hot film of the sensor 13 is also regulated to a constant temperature. However, the required signal is not used Heating power used, but the temperature profile at the membrane edge of the hot film air mass meter is determined.
- the air mass meter must therefore have at least two temperature-dependent resistors in addition to the hot film and the heating resistor. In the case of such a hot film air mass meter, for example, the temperature difference between an upstream and a downstream temperature-dependent resistor, which serves as a temperature sensor, is evaluated.
- the two output signals S1 and S2 emitted by blocks 10 and 11 are fed to a common evaluation device 12.
- the evaluation of the two signals S1 and S2 obtained by different methods takes place in this evaluation device 12, and the interference effects are compensated for.
- the output signal of the evaluation device 12 is then fed as a corrected measurement signal KM for further processing.
- This further processing can take place, for example, in the control unit of an internal combustion engine, which uses the measurement signal, which then specifies the air mass actually flowing in the intake manifold of an internal combustion engine, to calculate the control signals required for regulating the internal combustion engine.
- the arrangement shown in the figure represents a hot film air mass meter, in which a sensor is present which can be operated in two different methods, or in which the air mass is determined by two different methods.
- a sensor which can be operated in two different methods, or in which the air mass is determined by two different methods.
- Such an arrangement enables the air mass flow to be recorded redundantly by measuring the heating power and by evaluating the temperature profile. Since the two measuring methods react differently to interference effects, the type and magnitude of the two can be compared from the two sensor signals Interference effects are closed, and the interference effects determined in this way can be taken into account in the further signal evaluation and thus compensated for.
- HFM 2 hot film air mass meter
- HFM5 Hot film air mass meter
- Evaluation methods of a first type and evaluation methods of a second type are then carried out again and the measurement results are combined with one another, however for two sensors or sensor elements.
- the invention has been explained for the determination of a flowing air mass, but it can basically be used wherever a flowing medium influences a heatable measuring element.
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10063752 | 2000-12-21 | ||
DE10063752A DE10063752A1 (de) | 2000-12-21 | 2000-12-21 | Verfahren und Vorrichtung zur Ermittlung des Durchsatzes eines strömenden Mediums |
PCT/DE2001/004624 WO2002050412A1 (de) | 2000-12-21 | 2001-12-07 | Verfahren und vorrichtung zur ermittlung des durchsatzes eines strömenden mediums |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1356198A1 true EP1356198A1 (de) | 2003-10-29 |
EP1356198B1 EP1356198B1 (de) | 2006-03-08 |
Family
ID=7668106
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01271494A Expired - Lifetime EP1356198B1 (de) | 2000-12-21 | 2001-12-07 | Verfahren und vorrichtung zur ermittlung des durchsatzes eines strömenden mediums |
Country Status (7)
Country | Link |
---|---|
US (1) | US7096723B2 (de) |
EP (1) | EP1356198B1 (de) |
JP (1) | JP2004516465A (de) |
KR (1) | KR20020081337A (de) |
CN (1) | CN1283917C (de) |
DE (2) | DE10063752A1 (de) |
WO (1) | WO2002050412A1 (de) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10163751A1 (de) * | 2001-12-27 | 2003-07-17 | Bosch Gmbh Robert | Verfahren zum Betreiben einer Brennkraftmaschine |
JP3964347B2 (ja) * | 2003-04-18 | 2007-08-22 | 株式会社ケーヒン | 内燃機関の吸気装置 |
JP2006242748A (ja) * | 2005-03-03 | 2006-09-14 | Hitachi Ltd | 発熱抵抗体式空気流量測定装置およびその計測誤差補正方法 |
CN100491931C (zh) * | 2005-04-14 | 2009-05-27 | 中国科学院电工研究所 | 一种流量检测装置 |
DE102006010710B4 (de) * | 2006-03-08 | 2009-03-19 | Audi Ag | Verfahren zur Luftmassenermittlung bei Brennkraftmaschinen |
JP4202400B1 (ja) * | 2007-07-27 | 2008-12-24 | 三菱重工業株式会社 | き裂進展予測方法及びプログラム |
DE102009000067A1 (de) * | 2009-01-08 | 2010-08-26 | Innovative Sensor Technology Ist Ag | Vorrichtung zur Bestimmung und/oder Überwachung eines Massedurchflusses und Vorrichtung zur Bestimmung und/oder Überwachung einer Anlagerung einer Substanz |
DE102010030952B4 (de) * | 2010-07-05 | 2022-05-25 | Innovative Sensor Technology Ist Ag | Vorrichtung zur Bestimmung und/oder Überwachung eines Volumendurchflusses und/oder einer Durchflussgeschwindigkeit |
JP2012207925A (ja) * | 2011-03-29 | 2012-10-25 | Denso Corp | 熱式空気流量計 |
DE102013102398B4 (de) | 2013-03-11 | 2024-05-02 | Innovative Sensor Technology Ist Ag | Thermischer Strömungssensor zur Bestimmung der Zusammensetzung eines Gasgemisches, sowie dessen Strömungsgeschwindigkeit |
CN105181544A (zh) * | 2015-09-21 | 2015-12-23 | 劲天环境科技(上海)有限公司 | 一种空气中颗粒物浓度的检测装置及检测方法 |
DE102019110876A1 (de) * | 2019-04-26 | 2020-10-29 | Endress+Hauser Flowtec Ag | Verfahren zum Betreiben einer Sonde eines thermischen Durchflussmessgeräts und ein thermisches Durchflussmessgerät mit einer solchen Sonde |
JP7268533B2 (ja) * | 2019-08-23 | 2023-05-08 | トヨタ自動車株式会社 | エンジン制御装置 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4043196A (en) * | 1976-02-09 | 1977-08-23 | Technology Incorporated | Method and apparatus for effecting fluid flow measurement in a single sensor |
KR940002956B1 (ko) * | 1987-09-29 | 1994-04-09 | 미쓰비시전기주식회사 | 내연기관의 공연비 제어장치 |
JPH0750099B2 (ja) * | 1987-09-29 | 1995-05-31 | 三菱電機株式会社 | 内燃機関の燃料性状検出装置 |
DE3917908A1 (de) * | 1989-06-01 | 1990-12-06 | Siemens Ag | Verfahren zum bestimmen der luftfuellung des arbeitsvolumen einer fremdgezuendeten kolbenbrennkraftmaschine und zum bestimmen der kraftstoffeinleitmasse |
DE3925377A1 (de) | 1989-08-01 | 1991-02-07 | Bosch Gmbh Robert | Verfahren zur messfehlerkorrektur eines heissfilm-luftmassenmessers |
GB2270165B (en) * | 1992-08-28 | 1995-11-08 | Delco Electronics Corp | Method and apparatus for determining air pressure in an engine |
US5435180A (en) * | 1992-10-07 | 1995-07-25 | Hitachi, Ltd. | Method and system for measuring air flow rate |
JP3141762B2 (ja) * | 1995-12-13 | 2001-03-05 | 株式会社日立製作所 | 空気流量計測装置及び空気流量計測方法 |
DE19740916B4 (de) | 1997-04-01 | 2007-05-10 | Robert Bosch Gmbh | Verfahren zum Betreiben einer Brennkraftmaschine |
US6109249A (en) * | 1997-09-17 | 2000-08-29 | Robert Bosch Gmbh | System for operating an internal combustion engine |
US6370935B1 (en) * | 1998-10-16 | 2002-04-16 | Cummins, Inc. | On-line self-calibration of mass airflow sensors in reciprocating engines |
DE19927674B4 (de) * | 1999-06-17 | 2010-09-02 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Steuerung einer Brennkraftmaschine |
DE19933665A1 (de) * | 1999-07-17 | 2001-01-18 | Bosch Gmbh Robert | Vorrichtung zur Erfassung einer pulsierenden Größe |
-
2000
- 2000-12-21 DE DE10063752A patent/DE10063752A1/de not_active Withdrawn
-
2001
- 2001-12-07 WO PCT/DE2001/004624 patent/WO2002050412A1/de active IP Right Grant
- 2001-12-07 DE DE50109150T patent/DE50109150D1/de not_active Expired - Lifetime
- 2001-12-07 JP JP2002551278A patent/JP2004516465A/ja active Pending
- 2001-12-07 EP EP01271494A patent/EP1356198B1/de not_active Expired - Lifetime
- 2001-12-07 CN CNB018053092A patent/CN1283917C/zh not_active Expired - Fee Related
- 2001-12-07 KR KR1020027010825A patent/KR20020081337A/ko not_active Application Discontinuation
- 2001-12-07 US US10/204,519 patent/US7096723B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO0250412A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN1411534A (zh) | 2003-04-16 |
DE50109150D1 (de) | 2006-05-04 |
CN1283917C (zh) | 2006-11-08 |
US20030177843A1 (en) | 2003-09-25 |
JP2004516465A (ja) | 2004-06-03 |
WO2002050412A1 (de) | 2002-06-27 |
KR20020081337A (ko) | 2002-10-26 |
US7096723B2 (en) | 2006-08-29 |
EP1356198B1 (de) | 2006-03-08 |
DE10063752A1 (de) | 2002-06-27 |
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