EP1497622A1 - Dispositif pour mesurer une masse d'air s'ecoulant dans un conduit - Google Patents

Dispositif pour mesurer une masse d'air s'ecoulant dans un conduit

Info

Publication number
EP1497622A1
EP1497622A1 EP03722291A EP03722291A EP1497622A1 EP 1497622 A1 EP1497622 A1 EP 1497622A1 EP 03722291 A EP03722291 A EP 03722291A EP 03722291 A EP03722291 A EP 03722291A EP 1497622 A1 EP1497622 A1 EP 1497622A1
Authority
EP
European Patent Office
Prior art keywords
line
measuring
housing
air mass
measuring channel
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Withdrawn
Application number
EP03722291A
Other languages
German (de)
English (en)
Inventor
Frank Steuber
Stefan Pesahl
Jürgen SCHEIBNER
Kai Schurig
Andreas Wildgen
Stephen Setescak
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Continental Automotive GmbH
Original Assignee
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP1497622A1 publication Critical patent/EP1497622A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F5/00—Measuring a proportion of the volume flow
    • 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
    • G01F1/684—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow

Definitions

  • the invention relates to a device for measuring the air mass flowing in a line.
  • a device for measuring the air mass flowing in a line is also referred to briefly as an air mass measuring device or air mass sensor.
  • the device is inserted into the intake duct for the air mass, as a result of which a defined proportion of the total air flow flows through it.
  • the known plug-in duct air mass measuring devices essentially consist of a measuring duct in which a sensor is arranged, the electronics for the sensor which is arranged in a housing, and a plug-in element which immerses the measuring duct in the line.
  • Air mass sensors in the intake tract of internal combustion engines are well known. They serve to record the air mass sucked in for the cylinders of the internal combustion engine and thus enable the engine control system to correctly set the air / fuel mixture and other operating parameters. The operation of the air mass sensor will not be described in more detail here.
  • DE 44 07 209 discloses a device for measuring the mass of a medium flowing in a line, in which the housing for the electronics for the sensor projects into the intake pipe.
  • the bypass duct with the sensor carrier follows in the direction of insertion downstream of the electronics housing.
  • the plug-in element, the electronics for evaluating the sensor signals and the measuring channel are located one behind the other in the plug-in direction.
  • a disadvantage of this design for the air mass sensor is that it requires a large overall length changes, which can lead to installation problems, especially with small pipe diameters or small space in the engine compartment.
  • An air mass measuring device is known from US Pat. No. 5,939,628, in which the electronics for evaluating the measuring sensors are integrated into the plug-in element and are located outside the intake pipe. Although this air mass measuring device is shorter, the integration of the electronics in the plug-in element means that minor structural changes to the plug-in element are comparatively complex.
  • a structural change to the plug-in element necessitates a complex adaptation of the holder for the evaluation electronics and possibly the electronics themselves if an electrical plug connection for connecting the measuring device to a motor controller has to be oriented differently or designed for different plug connections.
  • the present invention is based on the object of providing a device for measuring the air mass flowing in a line, which allows flexible adaptation to a wide variety of installation situations with a short overall length.
  • the object is achieved by a device for measuring the air mass flowing in a line with the features from claim 1 or 2.
  • Advantageous embodiments form the subject of the subclaims.
  • the device according to the invention has a measuring channel element into which a defined portion of the air mass to be measured enters as an air flow via an inlet opening, the air flow washing around at least one measuring element and exiting into the line via an outlet opening. In its installed position, the measuring channel element is immersed in the line.
  • the air mass measuring device according to the invention has a plug-in element which is placed in an opening of the line Immerses the measuring channel element in the line.
  • the device according to the invention has a housing element which has an evaluation device for the signals of the sensor elements. The housing element and / or the measuring channel element can be connected to the insertion element and are held by the latter in the connected state.
  • the housing element and / or the measuring channel element is provided with connecting means which hold the housing element in the line on a side of the measuring channel element which is perpendicular to the main flow direction.
  • the main flow direction is the flow direction of the undisturbed air mass in the line.
  • the housing element and the measuring channel element are laterally connected to one another.
  • a too long overall length is avoided by the lateral arrangement of the elements.
  • the inclusion of the evaluation device in the housing element and in the line ensures that specific requirements for the insertion element can be implemented independently of the evaluation device. Another advantage has turned out to be that the small distance between sensors in the measuring channel and evaluation electronics leads to good electromagnetic compatibility.
  • an air mass measuring device in which the housing element has an essentially flat electronic substrate as an evaluation device, the normal direction of the electronic substrate being arranged in the line parallel to the main flow direction.
  • the housing element is provided with means for electrical and mechanical connection to the insert element.
  • the housing element is connected to the insert element and the measuring channel element is connected to the housing element.
  • the connection of the housing element with the insert element also takes place via electrical means, so that the signals of the evaluation device can be forwarded to a controller via the insert element.
  • the housing element is preferably constructed with a base element and a cover element, between which the electronic substrate is arranged.
  • the cover element is provided with webs which, when assembled, are connected to the measuring channel element.
  • the housing element is preferably arranged on the upstream side of the measuring channel element and has a convexly shaped cover element.
  • the evaluation device has an essentially flat element which is connected to the base element via an adhesive molding provided on both sides with adhesive and closes the recess.
  • adhesive moldings are known per se.
  • a substantially flat element, preferably the electronic substrate, is fastened in the evaluation device in such a way that its recess is closed.
  • the insert element additionally has a pin-shaped temperature sensor which projects from the insert element and through the opening into the line.
  • the housing element is provided with a drainage recess that is transverse to the insertion direction. This prevents the entry of
  • FIG. 1 is a side view of an air mass sensor according to the invention
  • 3 shows a measuring channel device with an electronics housing
  • Fig. 5 shows an electronics housing in the exploded view.
  • FIG. 1 shows the air mass sensor 10 according to the invention in a side view.
  • the air mass sensor 10 is inserted into the intake line 12.
  • the main direction of flow of the air is indicated by the arrow A.
  • Part of the air mass flow enters the bypass channel 16 via the inlet opening 14 (FIG. 3).
  • the air is guided past two sensors 18 and 20.
  • the sensors are designed, for example, in the form of temperature-dependent resistors with resistance layers, so-called hot-film resistors, in order to measure the mass of the air flowing past.
  • the measuring principles for determining an air mass flowing past in the bypass channel are known and need not be explained further here.
  • the bypass channel is provided with an electronics housing 22 on its upstream side. As shown in FIG. 3, the housing 22 is connected to the channel element 16, which will be explained in more detail below.
  • the electronics housing 22 is in turn connected to a plug element 24.
  • the plug element 24 is inserted into the opening in the line 12 and holds both the electronics housing and the channel element.
  • the plug element 24 serves as an insert element.
  • Fig. 2 shows a perspective view of the connector element closer.
  • the plug element 24 has a cover 26 which is provided with an orientation arrow for indicating the main flow device.
  • the body of the plug element 28 has a receiving slot 30 with electrical contacts 32.
  • a plug connection 34 leads away from the plug body 28 for forwarding the measurement signals to a motor controller (not shown).
  • the plug body 28 is additionally provided with a temperature sensor 36.
  • NTC negative temperature coefficient
  • the electronics housing 22 is provided with contact pins 38 which, when inserted, establish an electrical connection between the evaluation electronics and the plug element 24.
  • Fig. 4 shows the channel element 16 with its opening 14 for the bypass channel.
  • the bypass channel has a first section for the inflowing air and a second section which is connected to the first section via a deflection section. In the area of the deflection section, the first and second sections are separated from one another by a wall 40.
  • the sensor carriers with the sensors 18 and 20 are arranged in the bypass channel.
  • the channel element has a circumferential flange 42 on which the basic housing element 44 is placed.
  • the basic housing element 44 is provided with the contact pins 38.
  • the contact pins 38 protrude from a base 46.
  • the flat electronic substrate 48 Arranged in the base element 44 is the flat electronic substrate 48, which evaluates the measurement signals from the sensors 18 and 20 and forwards its results via the contact pins 38.
  • Placed on the basic element 44 is a housing cover 50 which is laterally provided with webs 52. The webs are arranged on the long sides of the housing cover near the corners.
  • the electronic substrate 48 is inserted into the base element 44, as will be explained in more detail below with reference to FIG. 5.
  • the cover 50 is put on and the webs 52 are guided laterally past the base element through the recesses 54.
  • the webs are connected to the flange 42 of the channel element, for example by gluing or welding.
  • the unit thus formed is inserted into the plug part 24 and the projection 46 is glued or welded in the slot 30.
  • An electrically conductive connection between the contact pins 38 and 32 is subsequently produced, for example by soldering.
  • FIG. 5 shows the fastening of the electronic substrate 48 in the base element 44.
  • the base element has an overmolded metal insert (not shown).
  • a molded adhesive part 56 which is adhesive on both sides is inserted into the base element 44.
  • the adhesive molding is provided with an opening 58.
  • two solder lugs 60 and 62 are provided for the sensor elements. Of the two pairs of solder tails, only one of each pair is visible in FIG. 1.
  • the opening 58 is arranged such that the measurement sensors can be soldered to the soldering fins 60 and 62 through the opening.
  • the electronic substrate 48 placed on the adhesive molding 56 closes an opening in the base element and thus also the measuring channel element.
  • 1 additionally shows a drainage recess 64 running transversely to the direction of flow, which collects splashing water and discharges it laterally in order to prevent entry into the inlet opening.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)

Abstract

L'invention concerne un capteur de masse d'air composé de trois parties, à savoir un élément insert, un élément canal de mesure et un élément boîtier où est logé un dispositif d'évaluation. L'invention vise à créer des éléments inserts flexibles adaptés à un encombrement plus faible en hauteur. A cet effet, l'élément canal de mesure et l'élément boîtier sont interconnectés le long d'un côté de l'élément canal de mesure perpendiculaire au sens d'écoulement principal.
EP03722291A 2002-04-22 2003-04-22 Dispositif pour mesurer une masse d'air s'ecoulant dans un conduit Withdrawn EP1497622A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10217884 2002-04-22
DE10217884A DE10217884B4 (de) 2002-04-22 2002-04-22 Vorrichtung zur Messung der in einer Leitung strömenden Luftmasse
PCT/DE2003/001311 WO2003089884A1 (fr) 2002-04-22 2003-04-22 Dispositif pour mesurer une masse d'air s'ecoulant dans un conduit

Publications (1)

Publication Number Publication Date
EP1497622A1 true EP1497622A1 (fr) 2005-01-19

Family

ID=28798666

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03722291A Withdrawn EP1497622A1 (fr) 2002-04-22 2003-04-22 Dispositif pour mesurer une masse d'air s'ecoulant dans un conduit

Country Status (6)

Country Link
US (1) US6865938B2 (fr)
EP (1) EP1497622A1 (fr)
JP (1) JP4448699B2 (fr)
KR (1) KR101029168B1 (fr)
DE (1) DE10217884B4 (fr)
WO (1) WO2003089884A1 (fr)

Families Citing this family (20)

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Publication number Priority date Publication date Assignee Title
JP4079116B2 (ja) * 2004-04-30 2008-04-23 オムロン株式会社 流量計
DE102006010374A1 (de) * 2006-03-03 2007-09-06 Mann + Hummel Gmbh Anordnung eines Luftmassenmessers an einem Strömungskanal
DE102007008291A1 (de) 2007-02-16 2008-08-21 Siemens Ag Luftmassenmesser
DE102007017058A1 (de) 2007-04-11 2008-10-16 Continental Automotive Gmbh Verfahren zur Luftmassenmessung und Luftmassensensor
DE102007021025A1 (de) 2007-05-04 2008-11-06 Continental Automotive Gmbh Luftmassenmesser
DE102007035187A1 (de) 2007-07-27 2009-01-29 Continental Automotive Gmbh Luftmassenmesser
DE102007038474A1 (de) 2007-08-14 2009-02-19 Continental Automotive Gmbh Messverfahren und Massensensor
DE102007041109B4 (de) 2007-08-30 2009-07-09 Continental Automotive Gmbh Fluidmassenmesser
JP5047079B2 (ja) 2008-07-02 2012-10-10 三菱電機株式会社 流量測定装置
US20100052657A1 (en) * 2008-08-26 2010-03-04 Omega Engineering, Inc. Measurement connector
JP5093315B2 (ja) * 2010-08-24 2012-12-12 株式会社デンソー 流量測定装置
DE102011088767A1 (de) 2011-12-15 2013-06-20 Continental Automotive Gmbh Verfahren zur Auswertung von Messsignalen eines Luftmassenmessers
DE102012219287A1 (de) 2012-10-23 2014-04-24 Continental Automotive Gmbh Verfahren zum Betreiben eines Luftmassenmessers
DE102012219305B3 (de) * 2012-10-23 2014-02-13 Continental Automotive Gmbh Luftmassenmesser mit einem Sensorelement
DE102012219290A1 (de) 2012-10-23 2014-04-24 Continental Automotive Gmbh Verfahren zum Betreiben eines Luftmassenmessers
DE102012219304A1 (de) 2012-10-23 2014-04-24 Continental Automotive Gmbh Luftmassenmesser
DE102012220019B3 (de) 2012-11-02 2014-02-13 Continental Automotive Gmbh Luftmassenmesser
DE102014219541A1 (de) 2014-09-26 2016-03-31 Continental Automotive Gmbh Luftmassenmesser mit einem Sensorelement
DE102015220855A1 (de) * 2015-10-26 2017-04-27 Robert Bosch Gmbh Sensorvorrichtung zur Erfassung mindestens einer Strömungseigenschaft eines fluiden Mediums
DE102015225358B4 (de) 2015-12-16 2020-04-02 Continental Automotive Gmbh Luftmassenmesser

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EP0441523B2 (fr) * 1990-02-07 2001-05-09 Hitachi, Ltd. Débitmètre d'air pour un moteur à combustion interne
US5939628A (en) * 1995-05-30 1999-08-17 Hitachi, Ltd. Thermal type air flow measuring instrument for internal combustion engine
DE4407209C2 (de) * 1994-03-04 1996-10-17 Bosch Gmbh Robert Vorrichtung zur Messung der Masse eines in einer Leitung strömenden Mediums
US6422070B2 (en) * 1994-03-04 2002-07-23 Robert Bosch Gmbh Device for measuring the mass of a flowing medium
US5595163A (en) * 1995-06-06 1997-01-21 Hitachi America, Ltd. Apparatus and method for controlling the fuel supply of a gas-fueled engine
JP3475579B2 (ja) * 1995-06-20 2003-12-08 株式会社デンソー 吸気温センサの取付構造およびそれを用いた熱式流量計
JP2786434B2 (ja) * 1996-12-25 1998-08-13 株式会社日立製作所 熱式空気流量計
JP3523022B2 (ja) * 1997-06-26 2004-04-26 株式会社日立製作所 発熱抵抗体式空気流量測定装置及び内燃機関の吸気系システム及び内燃機関の制御システム
US6308553B1 (en) * 1999-06-04 2001-10-30 Honeywell International Inc Self-normalizing flow sensor and method for the same
DE10046943A1 (de) * 2000-09-21 2002-04-18 Siemens Ag Massenstrommesser

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Also Published As

Publication number Publication date
KR20040110070A (ko) 2004-12-29
DE10217884B4 (de) 2004-08-05
US6865938B2 (en) 2005-03-15
JP4448699B2 (ja) 2010-04-14
KR101029168B1 (ko) 2011-04-12
JP2005523446A (ja) 2005-08-04
US20040134272A1 (en) 2004-07-15
WO2003089884A1 (fr) 2003-10-30
DE10217884A1 (de) 2003-11-06

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