EP1356198B1 - Procede et dispositif pour determiner le debit d'un milieu en ecoulement - Google Patents

Procede et dispositif pour determiner le debit d'un milieu en ecoulement Download PDF

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Publication number
EP1356198B1
EP1356198B1 EP01271494A EP01271494A EP1356198B1 EP 1356198 B1 EP1356198 B1 EP 1356198B1 EP 01271494 A EP01271494 A EP 01271494A EP 01271494 A EP01271494 A EP 01271494A EP 1356198 B1 EP1356198 B1 EP 1356198B1
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EP
European Patent Office
Prior art keywords
throughput
air mass
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.)
Expired - Lifetime
Application number
EP01271494A
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German (de)
English (en)
Other versions
EP1356198A1 (fr
Inventor
Dieter Tank
Josef Kleinhans
Wolfgang Kienzle
Hans Hecht
Manfred Strohrmann
Wolfgang-Michael Mueller
Axel-Werner Haag
Uwe Konzelmann
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication of EP1356198A1 publication Critical patent/EP1356198A1/fr
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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
    • F02D41/18—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 flow rate of a flowing medium, in particular for determining the prevailing in the intake manifold of an internal combustion engine air flow and thus for determining the intake air mass.
  • air mass hot-film air mass meter For detecting the intake of an internal combustion engine air mass hot-film air mass meter are usually used. These have a heatable element, which is exposed to the air flow to be measured and is cooled by this. There are various possibilities for the design of the hot-film air mass meter, as well as for the heating control and the evaluation methods. Both types of air mass meters, or an existing method for detecting the mass air flow with a hot-film air mass meter, based on the measurement of the heat that is delivered to the passing air mass flow. For this purpose, in one type of air mass meters, the electrical energy needed to control the hot film to a constant temperature is measured. A second method, or a second associated Sensor arrangement, based on the fact that the hot film is also controlled to a constant temperature.
  • the temperature difference between these two points is determined by means of a temperature sensor located upstream and downstream of the heating area.
  • Both temperature sensors which are designed as temperature-dependent resistors, are part of a bridge circuit. From the resulting bridge voltage, a measurement signal is obtained which represents the temperature difference between the upstream and downstream of the heating temperature-dependent resistor.
  • Both types of sensors or evaluation methods can be affected by disruptive effects such as humidity or soiling. This can lead to a false display of such a sensor, or to an error in the signal evaluation.
  • DE 197 40 916 A1 discloses methods for determining the throughput of a flowing medium in the intake manifold of an internal combustion engine, in which the output signals of two different sensors, namely an air mass sensor and a pressure sensor, are evaluated. From both output signals, the air mass is finally determined. Since there are different sensors, the evaluation methods are different. In the evaluation method in which the output signal of a pressure sensor is evaluated, an additional measured variable, namely the throttle valve angle, is required to determine the air mass from the pressure signal.
  • the object of the invention is to minimize the mentioned error sources and the resulting false indications.
  • the object is achieved with a method and / or a device according to the invention for determining the flow rate of a flowing medium having the features of claim 1.
  • the inventive method and / or the inventive device for determining the flow rate of a flowing medium, in particular of an internal combustion engine aspirated air mass has the advantage that disturbing effects in the measurement can be compensated. This is advantageously done by performing a redundant measurement operating on two different methods performed on a single sensor, or two different types of air mass measurement sensors, it being essential that the two selected methods and the two sensors react differently to parasitic effects. By combining the two measurement results, it is then possible to compensate for disturbing effects that occur more strongly in one method or the associated sensor than in the other method or in the other sensor.
  • the air mass flow LS to be measured is determined according to two different methods, which both work with the same sensor 13, which comprises a heatable hot film.
  • the sensor 13 is constructed so that it is suitable for both methods of measurement and is exposed to the flowing air mass flow LS, which cools him.
  • the evaluation method which runs in block 10, represents a first type of evaluation method and is based on the measurement of the heat which is emitted at the air mass flow flowing past the sensor.
  • the heat given off to the passing air mass flow is determined by measuring the electrical energy needed to control the hot film to a constant temperature. So it is ultimately the heating power measured and the air mass flow determined from it.
  • the second type of detection of the air mass flow or the second evaluation process takes place in block 12 and takes place by evaluation of the temperature profile.
  • the hot film of the sensor 13 is also regulated to a constant temperature.
  • the measurement signal is not the required Heating power used, but the temperature profile at the diaphragm 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 such a hot-film air mass meter, for example, the temperature difference between an upstream and downstream of the heating area lying temperature-dependent resistance, which serves as a temperature sensor, evaluated.
  • the two output from the blocks 10 and 11 output signals S1 and S2 are fed to a common evaluation device 12.
  • this evaluation device 12 the evaluation of the two obtained by different methods signals S1 and S2 and there is a compensation of the parasitic effects.
  • the output signal of the evaluation device 12 is then supplied as a corrected measurement signal KM for further processing.
  • This further processing can be carried out, for example, in the control unit of an internal combustion engine, which then calculates the actual air mass flowing in the intake manifold of an internal combustion engine which calculates the control signals required for the control of the internal combustion engine.
  • the arrangement shown in the figure represents a hot-film air mass meter, in which a sensor is present, which is operable in two different methods, or in which the air mass is determined by two different methods.
  • a sensor is present, which is operable in two different methods, or in which the air mass is determined by two different methods.
  • Such an arrangement makes it possible to redundantly detect the air mass flow by measuring the heating power and by evaluating the temperature profile. Since both measuring methods react differently to parasitic effects, the comparison of the two sensor signals on the type and magnitude of the relevant Disturbing effects are closed, and the interference effects thus determined can be taken into account in the further signal evaluation and thus compensated.
  • HFM 2 hot-film air mass meter
  • HFM5 Hot-film air mass meter
  • Evaluation methods of a first type and evaluation method of a second type are then also 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 is generally applicable wherever a flowing medium affects a heatable measuring element.

Abstract

L'invention concerne des procédés et/ou des dispositifs pour déterminer le débit d'un milieu en écoulement, notamment l'écoulement d'une masse d'air. Selon l'invention, le milieu en écoulement est analysé au moyen de deux procédés d'évaluation répondant à des principes différents, et les deux signaux de mesure obtenus sont mis en corrélation pour déterminer des procédés de correction. Ces deux procédés de mesure réagissant différemment face à des perturbations, la comparaison des deux signaux de départ permet de connaître le type et l'ordre de grandeur de ces perturbations et d'obtenir un signal de mesure corrigé, qui n'est pas influencé par lesdites perturbations.

Claims (6)

  1. Procédé pour déterminer le débit d'un milieu en écoulement, en particulier de la masse d'air qui circule dans la tubulure d'admission d'un moteur à combustion interne, dans lequel le débit massique d'air est déterminé selon deux procédés d'exploitation différents et les deux résultats de mesure différents sont combinés entre eux pour obtenir des grandeurs de correction, les deux procédés d'exploitation font appel à différents signaux de mesure du même élément de mesure de débit (13), ou à différents signaux de mesure de deux éléments de mesure du débit (HFM2, HFM5), les deux procédés d'exploitation réagissant différemment à des effets perturbateurs, de sorte qu'à partir de la comparaison des deux signaux, on peut déduire le type et/ou l'ordre de grandeur d'effets perturbateurs qui se manifestent,
    caractérisé en ce que
    l'élément de mesure du débit (13) est un appareil de mesure de masse d'air à film chaud, ou les deux éléments de mesure du débit (HFM2, HFM5) sont des appareils de mesure de la masse d'air à film chaud et les deux procédés d'exploitation supposent que le film chaud ou les deux films chauds est ou sont réglé(s) chacun sur une température constante.
  2. Procédé pour la détermination du débit d'un milieu en écoulement selon la revendication 1,
    caractérisé en ce que
    dans le premier procédé d'exploitation, on mesure la puissance de chauffage nécessaire.
  3. Procédé pour la détermination du débit d'un milieu en écoulement selon la revendication 1,
    caractérisé en ce que
    dans le deuxième procédé d'exploitation, on détermine un profil de température.
  4. Procédé pour la détermination du débit d'un milieu en écoulement selon la revendication 3,
    caractérisé en ce qu'
    on exploite la différence de température entre deux résistances sensibles à la température situées en amont et en aval de la zone de chauffage, par rapport au sens du milieu en écoulement, et qui servent chacune de capteur de température.
  5. Procédé pour la détermination du débit d'un milieu en écoulement selon la revendication 3,
    caractérisé en ce que
    les deux capteurs de température sont des résistances sensibles à la température qui se trouvent dans un circuit en pont et la tension du pont qui s'établit par suite de la différence de température existante est exploitée comme signal de mesure.
  6. Dispositif pour la détermination du débit d'un milieu en écoulement,
    caractérisé en ce que
    le dispositif comprend des moyens qui mettent en oeuvre un procédé selon une des revendications précédentes.
EP01271494A 2000-12-21 2001-12-07 Procede et dispositif pour determiner le debit d'un milieu en ecoulement Expired - Lifetime EP1356198B1 (fr)

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 (fr) 2000-12-21 2001-12-07 Procede et dispositif pour determiner le debit d'un milieu en ecoulement

Publications (2)

Publication Number Publication Date
EP1356198A1 EP1356198A1 (fr) 2003-10-29
EP1356198B1 true EP1356198B1 (fr) 2006-03-08

Family

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EP01271494A Expired - Lifetime EP1356198B1 (fr) 2000-12-21 2001-12-07 Procede et dispositif pour determiner le debit d'un milieu en ecoulement

Country Status (7)

Country Link
US (1) US7096723B2 (fr)
EP (1) EP1356198B1 (fr)
JP (1) JP2004516465A (fr)
KR (1) KR20020081337A (fr)
CN (1) CN1283917C (fr)
DE (2) DE10063752A1 (fr)
WO (1) WO2002050412A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010030952A1 (de) 2010-07-05 2012-01-05 Innovative Sensor Technology Ist Ag Vorrichtung zur Bestimmung und/oder Überwachung eines Volumendurchflusses und/oder eienr Durchflussgeschwindigkeit

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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
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

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010030952A1 (de) 2010-07-05 2012-01-05 Innovative Sensor Technology Ist Ag Vorrichtung zur Bestimmung und/oder Überwachung eines Volumendurchflusses und/oder eienr Durchflussgeschwindigkeit
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

Also Published As

Publication number Publication date
CN1411534A (zh) 2003-04-16
DE50109150D1 (de) 2006-05-04
EP1356198A1 (fr) 2003-10-29
CN1283917C (zh) 2006-11-08
US20030177843A1 (en) 2003-09-25
JP2004516465A (ja) 2004-06-03
WO2002050412A1 (fr) 2002-06-27
KR20020081337A (ko) 2002-10-26
US7096723B2 (en) 2006-08-29
DE10063752A1 (de) 2002-06-27

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