EP1204847A1 - Vorrichtung zur bestimmung zumindest eines parameters eines strömenden mediums - Google Patents
Vorrichtung zur bestimmung zumindest eines parameters eines strömenden mediumsInfo
- Publication number
- EP1204847A1 EP1204847A1 EP01957727A EP01957727A EP1204847A1 EP 1204847 A1 EP1204847 A1 EP 1204847A1 EP 01957727 A EP01957727 A EP 01957727A EP 01957727 A EP01957727 A EP 01957727A EP 1204847 A1 EP1204847 A1 EP 1204847A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sensor
- carrier
- cavern
- sensor element
- measuring housing
- 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- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
- G01K13/02—Thermometers specially adapted for specific purposes for measuring temperature of moving fluids or granular materials capable of flow
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
-
- 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
- G01F1/6842—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow with means for influencing the fluid 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
- G01F1/6845—Micromachined devices
Definitions
- the invention is based on a device for determining at least one parameter of a medium flowing in a line with a sensor carrier for receiving a sensor element according to the preamble of claim 1.
- Air mass measuring device is known, the sensor carrier with the sensor element protruding into a measuring channel in which a medium flows.
- the sensor element supplies a measurement signal that is used to calculate the mass of the flowing medium.
- the sensor carrier has a recess in which the
- the sensor carrier is produced by first removing an opening from a metal strip which corresponds approximately to the outer shape of the sensor element, then bending the metal strip around a bending axis outside the recess and then in this way is pressed together so that a bent part of the metal strip forms a holding element and a non-bent part of the metal strip forms a frame element of the sensor carrier with the opening.
- the holding element covers the opening of the frame element and forms a recess with it. Thereafter, plateau-shaped elevations are created by further shaping of the holding element, which serve as a spacer or support surface. The sensor element is then glued into the recess.
- the sensor element with its. Surface is glued into the recess as flush as possible to the surface of the sensor carrier, since even the slightest misalignment, for example due to an unevenly applied adhesive layer, results in eddies and detachment areas which adversely affect the heat dissipation of the measuring resistor, in particular on the surface of the sensor element, and falsify the measurement result , Therefore, very small dimensional tolerances of the recess are to be provided, and extreme care is required when the sensor element is glued into the recess of the sensor carrier, so that, particularly in the case of mass production of the device, a high outlay in terms of production technology is required, which causes considerable production costs.
- the spacers are only formed by a further shaping process.
- the tolerance of the depth of the recess is given by the tolerance of the thickness of the metal strip and the tolerance of the gap width.
- a corrosion protection layer on the sensor carrier such as e.g. NiNiP
- a corrosion protection layer on the sensor carrier must be applied by an additional, expensive electroplating process or a coating method that further increases the dimensional tolerances and the production times and costs.
- a gap arises between the sensor element and the recess of the sensor carrier due to manufacturing tolerances.
- the gap can be so large that the sensor element can have an undesirable underflow of the cavity under its membrane in the recess, which has a disadvantageous effect on the measurement result of the device.
- a redirection of the flow at a specially shaped edge of the sensor element prevents the medium flowing in via the gap from being able to get into a cavity below the membrane of the sensor element.
- Applying adhesive seams as described in DE 197 43 409 AI, can prevent the medium from penetrating into the gap around the sensor element in order to avoid unwanted undercurrents.
- a disadvantage of both methods is that the flow around the cavity is only diverted through the special arrangement of the adhesive seams or through additional measures in order to compensate for the effects of the manufacturing tolerances.
- a thermal air flow meter is known in which a carrier housing and a Measuring housings are formed separately from one another and the measuring housing and the carrier housing are glued to a base plate element.
- the device according to the invention with the characterizing features of claim 1 has the advantage that the measurement result is not deteriorated in a simple manner even during longer operating times, because the influence on the measurement result as a result of an underflow of the measuring element by an air stream via an open or clogged one Fold gap does not exist, and the tolerance of the depth of the recess according to the invention is determined only by the tolerance of the sensor cavern and no longer additionally by the tolerance of the fold gap.
- a sensor element can advantageously be connected to electronics prior to installation in the device.
- An aerodynamically shaped leading edge is advantageous for the inflow behavior.
- plastic from the plastic class of liquid crystal polymers or semi-crystalline aromatic thermoplastic is used.
- Adhesive bead is placed across the sensor cavern floor, which completely seals the sensor area of the sensor element in the sensor cavern, and that depressions are provided in the edge area of the sensor cavern floor, so that the sensor element can be used more precisely. Contamination of the sensor element by reliably stopping the gel, which protects an evaluation circuit from moisture, is prevented by this adhesive bead.
- plastic or ceramic since plastic is not so in comparison to metal ⁇ 1 -
- FIG. 2 shows a sensor carrier designed according to the invention with a built-in sensor element
- FIG. 3a shows the sensor carrier designed according to the invention without a sensor element
- FIG. 3b shows a section along the
- FIG. 4a shows a device with a bypass channel into which the sensor carrier is inserted
- FIG. 4b shows a section along the line B-B in FIG. 4a
- FIG. 1 shows schematically how a device 1 is installed in a line 3 in which a medium to be measured flows.
- the device 1 is used to determine at least one parameter of the pouring medium and consists of a measuring housing 6, characterized by a lower rectangle drawn in dash-dotted lines, and a support part 7, characterized by an upper rectangle drawn in dash-dotted lines, in which e.g. evaluation electronics 18 e.g. is housed on a base support 26 (FIG. 2) in an electronics room 19.
- Parameters of a flowing medium are, for example, the air volume flow for determining an air mass, a temperature, a pressure, a concentration of a medium component or a flow rate, which are determined by means of suitable sensors.
- the use of the device 1 for determining other parameters is possible.
- the parameters can be determined by using one or more sensors, wherein a sensor can also determine two or more parameters.
- the measuring housing 6 and the carrier part 7 have a common longitudinal axis 9 which e.g. can also be the central axis.
- the device 1 is, for example, inserted into a wall 12 of the line 3.
- the wall 12 delimits a flow cross section in the middle of which extends in the direction of the flowing medium, and a central axis 14 extends parallel to the wall 12.
- the direction of the flowing medium hereinafter referred to as
- FIG. 2 shows a sensor carrier 20 with a built-in sensor element 33.
- the sensor element 33 is shown schematically and transparently in part in FIG. 2 and has a membrane 35 on an outwardly facing surface, which forms the sensor area.
- contacts 38 On the same surface at the other end of the sensor element 33 are contacts 38, 'which establish the electrical connection to the electronic evaluation circuit 18th.
- the sensor element 33 is arranged in a sensor cavern 29 such that the contacts 38 are closest to the base support 26.
- the sensor element 33 is here, for example, plate-shaped and is flush with the sensor cavern 29.
- the sensor cavern 29 and the sensor element 33 form a gap 44.
- the sensor element 33 and the surface 22 of the sensor carrier 20 are flush here, for example.
- FIG. 3a shows the sensor carrier 20, which is made of plastic, for example.
- the medium flows past the sensor carrier 20 in the direction of the arrows 16. In doing so, it meets a leading edge 47 of the sensor carrier 20, which due to the use of plastic is particularly rounded and aerodynamically shaped.
- the sensor cavern 29 with a sensor cavern floor 30 is located on the surface 22 Form frame element.
- the sensor cavern floor 30 is divided, for example, by an adhesive displacement space 49 into a sensor base 52 and a support surface 54.
- the sensor base 52 is furthest away from the base support 26 and lies below the sensor area of the sensor element 33.
- the support surface 54 is the closest to the base support 26.
- the adhesive displacement space 49 here is, for example, a continuous channel from a longitudinal edge 57 to the 'opposite longitudinal edge 57' 'of the sensor cavern 29.
- the longitudinal edges 57, 57' ' run parallel to the longitudinal axis 9.
- the adhesive displacement space 49 cannot be continuous, i.e. be shorter.
- the adhesive displacement space 49 between the sensor base 52 and the support surface 54 can also be formed, for example, by at least two depressions in the sensor cavern floor 30.
- the spacers 60 are, for example, plateau-shaped.
- a recess 63, 63 "is formed in each of the longitudinal edges 57, 57". From the recess 63 across the
- a contact surface 54 to the other recess 63 is applied to the adhesive process for an adhesive bead 65, which is shown in broken lines.
- the sensor base area 52 is completely covered by an adhesive bead 65 in front of a sensor gel, which is on an electronic evaluation circuit is applied and in an undesired manner creeps in the direction of the membrane 35.
- the sensor element 33 lies, for example, partly in the sensor cavern 29 and lies, for example, on the spacers 60.
- the sensor element 33 is, for example, with the contact surface 54 glued by means of the adhesive bead 65 and closes at its height along its circumference Surface 22 is flush with the sensor cavern 29, so that the medium hardly or not at all flows under the sensor element 33 into the sensor cavern 29.
- a gap 44 between the sensor element 33 and the longitudinal edge 57 of the sensor cavern 29 has, for example, an order of magnitude of a few micrometers.
- a depth of the sensor cavern 29 and the edges of the sensor cavern 29 are shaped, for example, such that a plate-shaped sensor element 33, for example, can be introduced flush with the surface 22.
- the depth dimensions in the area of the contact surface 54 of the sensor element 33 starting from the surface 22 are generally tolerated with +/- 10 micrometers.
- the sensor carrier 20 is shaped here in such a way that the surface 22 and the surface opposite it are plane-parallel to one another and aligned with the main flow direction 16 such that a vector of the main flow direction 16 lies in the plane of the sensor region of the sensor element 33.
- the vector of the main flow direction 16 can intersect the plane of the sensor area at a small positive or negative angle.
- Cross-section of the sensor carrier 20 is wedge-shaped perpendicular to the surface 22, the thinner end of the wedge being in the region of the leading edge 47 and the vector of the main flow direction 16 not being in the surface 22.
- FIG. 3b shows a section along the line AA in FIG. 3a, the sensor carrier 20 in this example having no adhesive displacement space 49 and no spacers 60.
- a channel end face 67 of the sensor carrier 20 adapts to the shape of a wall of a bypass channel 70 (FIG. 4), so that no flowing medium gets between the channel end face 67 and the wall of the bypass channel 70.
- the contact surface can also be sealed by an adhesive or seal.
- the end 68 opposite the channel end face 67 has an insert 69 which is inserted into a receptacle 73 (FIG. 4b) in the region of the electronics room 19 and is connected there, for example, by press fitting or adhesive bonding.
- FIG. 4a shows the measuring housing 6 with the bypass channel 70 and the carrier part 7 without a cover closing the bypass channel 70.
- the bypass channel 70 is formed by a bottom part 72 and the cover.
- the main direction of flow 16 of the medium is indicated by arrows.
- the bypass duct 70 consists, for example, of an inlet duct 74 or measuring duct 74, a deflection duct 76, which in turn is divided into a first part 77 and a second part 78, and an outlet duct 80.
- the flow direction 82, 83 is in the inlet 74 and outlet duct 80 also indicated by arrows.
- the inlet channel center line 86 is curved here, for example, since the edge surfaces 88 of the inlet channel 74 are of streamlined design.
- the outlet channel center line 91 is, for example, a straight line here.
- a flow obstacle 94 is provided which causes a defined flow separation effective for the measuring channel. This is explained in more detail in DE 44 41 874 AI and is intended to be part of this disclosure.
- a bow 99 of the measuring housing 6 is shaped, for example, in such a way that solid or liquid particles striking it are reflected away from the inlet opening 97.
- the bow 99 is inclined away from the carrier part 7.
- a dashed area 102 which runs parallel to the main flow direction 16, forms with the edge surface of the inlet channel 74 facing the support part 7 a shaded area into which only a few or no dirt particles or liquids get.
- the angle ⁇ can be in the range of approximately 30 to 60 degrees, ideally approximately 45 degrees. The influence of this
- the edge surface 104 has a depth tr (not shown) and a width br running perpendicular thereto, which corresponds to at least 2/3 the width b of the inlet opening 97 of the inlet channel 74.
- the depth tr preferably corresponds approximately to the depth t (not shown) of the measuring channel 70 perpendicular to its width b at the inlet opening 97.
- the wall of the first section 77 runs approximately in the direction of the longitudinal axis 9.
- the outlet opening 107 has, for example, a larger cross section than the outlet channel 80, as a result of which the pulsation behavior is improved.
- the sensor carrier 20 projects into the bypass channel 70, for example into the
- Inlet channel 74 which forms the measuring channel.
- the sensor element 33 is accommodated in the sensor carrier 20 and is expediently in the shaded area of the inlet channel 74.
- the structure of such a measuring element 10 is sufficiently known to the person skilled in the art, for example from DE 195 24 634 AI, the disclosure of which is to be part of the present patent application.
- the electronics 18, which is used to evaluate and control the sensor element, are arranged in the electronics room 19, which is part of the carrier part 7.
- Figure 4b shows a section along line B-B of Figure 4a.
- the sensor carrier 20 is inserted into a receptacle 73 and fastened there by press fitting or gluing. If adhesive is used, it simultaneously seals a transition area 71 between the bypass channel 70 and the electronics space 19.
- the receptacle 73 can be arranged in the bypass channel 70, in the carrier part 7 or in between.
- a side wall 75 of the bypass channel 70 faces away from the carrier part 7 and the
- Longitudinal axis 9 forms a clearly different angle of intersection with the side wall 75.
- the channel end face 67 adapts to the shape of the side wall 75 of the bypass channel 70 so that there is no underflow there. This can be additionally secured by applying adhesive or sealant.
- the electronics 18 is arranged, for example, on a base support 26 and is coated with a protective gel.
- the sensor carrier 20 can also be glued to the base carrier 26.
- FIG. 5 shows a section along the line VV in FIG. 3 through the sensor carrier 20 with inserted sensor element 33 and adhesive bead 65 (indicated by dashed lines).
- the bead of adhesive 65 was placed, for example, from the recess 63 on the longitudinal edge 57 via the support surface 54 to the recess 63 "on the longitudinal edge 57". After inserting the sensor element 33 into the sensor cavern 29, for example, adhesive is forced out into the adhesive displacement space 49 and through the gaps 44, 44 "and extends to the surface 22.
- the adhesive closes the gap 44 between the sensor element 33 and the sensor cavern 29 at the one longitudinal edge 57 continuously under the sensor element 33 to the other longitudinal edge 57 ′′ and the gap 44 ′′ completely, so that contamination of the sensor element 33 with its membrane 35 is prevented by a reliable stop of the creeping protective gel of the evaluation circuit 18.
- Figure 6 shows various arrangements of sensor carrier 20 and sensor element 33 within the measuring housing 6, which is indicated by dashed lines.
- the sensor carrier 20 is arranged as follows: a longitudinal axis 9 of the sensor carrier 20 is perpendicular to the main flow direction 16 and a longitudinal axis of the
- Sensor element 33 runs parallel to the longitudinal axis 9. However, in FIG. 6 a) the sensor element 33 is arranged with its longitudinal axis 110 in the sensor carrier 20 at an angle ⁇ with respect to the longitudinal axis 9. In FIG. 6 b), a longitudinal axis 112 of the sensor carrier 20 is arranged inclined at an angle ⁇ with respect to the longitudinal axis 9. The longitudinal axis 110 of the sensor element 33 runs parallel to the longitudinal axis 9. With these arrangements, the flow and flow behavior of the sensor element 33 and the sensor carrier 20 can be further improved. Furthermore, a preferred orientation of the sensor element 33 to the main flow direction 16 can thereby be set.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Measuring Volume Flow (AREA)
- Sampling And Sample Adjustment (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10036290A DE10036290A1 (de) | 2000-07-26 | 2000-07-26 | Vorrichtung zur Bestimmung zumindest eines Parameters eines strömenden Mediums |
DE10036290 | 2000-07-26 | ||
PCT/DE2001/002761 WO2002008701A1 (de) | 2000-07-26 | 2001-07-20 | Vorrichtung zur bestimmung zumindest eines parameters eines strömenden mediums |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1204847A1 true EP1204847A1 (de) | 2002-05-15 |
Family
ID=7650207
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01957727A Withdrawn EP1204847A1 (de) | 2000-07-26 | 2001-07-20 | Vorrichtung zur bestimmung zumindest eines parameters eines strömenden mediums |
Country Status (10)
Country | Link |
---|---|
US (1) | US6820479B2 (de) |
EP (1) | EP1204847A1 (de) |
JP (1) | JP5231704B2 (de) |
KR (1) | KR100866267B1 (de) |
CN (1) | CN100432632C (de) |
AU (1) | AU774511B2 (de) |
BR (1) | BR0107032A (de) |
CZ (1) | CZ20021024A3 (de) |
DE (1) | DE10036290A1 (de) |
WO (1) | WO2002008701A1 (de) |
Families Citing this family (31)
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DE10345584A1 (de) | 2003-09-29 | 2005-04-28 | Bosch Gmbh Robert | Leiterplatte mit Kunststoffteil zur Aufnahme einer Messeinrichtung |
EP1685811A1 (de) | 2005-01-26 | 2006-08-02 | Cervitech, Inc. | Zervikale Zwischenwirbelprothesen |
US7194920B2 (en) * | 2005-03-15 | 2007-03-27 | Welker Engineering Company | Sensor probe and pipeline construction and method |
DE102005016449A1 (de) * | 2005-04-11 | 2006-10-12 | Robert Bosch Gmbh | Beheizter Heißfilmluftmassenmesser |
JP4830391B2 (ja) * | 2005-07-29 | 2011-12-07 | 株式会社デンソー | センサ装置の製造方法及びセンサ装置 |
JP4979262B2 (ja) * | 2006-05-08 | 2012-07-18 | 日立オートモティブシステムズ株式会社 | 流量測定装置 |
JP2008139298A (ja) * | 2006-11-10 | 2008-06-19 | Hitachi Ltd | 温度センサ一体型圧力センサ |
JP5196218B2 (ja) * | 2006-11-10 | 2013-05-15 | 富士電機株式会社 | 圧力センサ装置及び圧力センサ容器 |
JP4404104B2 (ja) * | 2007-03-29 | 2010-01-27 | 株式会社デンソー | 空気流量測定装置 |
DE102007019282A1 (de) * | 2007-04-24 | 2008-11-06 | Robert Bosch Gmbh | Vorrichtung zur Messung strömender Medien |
JP4577370B2 (ja) * | 2008-02-12 | 2010-11-10 | 株式会社デンソー | センサ装置およびその製造方法 |
DE102008042155A1 (de) * | 2008-09-17 | 2010-03-18 | Robert Bosch Gmbh | Sensoranordnung zur Bestimmung eines Parameters eines fluiden Mediums |
JP5272801B2 (ja) * | 2009-02-27 | 2013-08-28 | 株式会社デンソー | 空気流量測定装置 |
JP5293278B2 (ja) * | 2009-03-05 | 2013-09-18 | 株式会社デンソー | 熱式流量計 |
FR2956737B1 (fr) * | 2010-02-25 | 2012-03-30 | Auxitrol Sa | Sonde brise glace pour la mesure de la temperature totale d'air |
IT1400631B1 (it) * | 2010-06-18 | 2013-06-14 | Extraflame S P A | Dispositivo di rilevamento del flusso di aria in ingresso in apparecchi per il riscaldamento degli ambienti e relativo metodo. |
JP5496027B2 (ja) | 2010-09-09 | 2014-05-21 | 日立オートモティブシステムズ株式会社 | 熱式空気流量計 |
JP2012103078A (ja) * | 2010-11-09 | 2012-05-31 | Denso Corp | 流量センサ |
DE102011005768A1 (de) * | 2011-03-18 | 2012-09-20 | Robert Bosch Gmbh | Vorrichtung zur Erfassung mindestens einer Eigenschaft eines fluiden Mediums |
US9490193B2 (en) * | 2011-12-01 | 2016-11-08 | Infineon Technologies Ag | Electronic device with multi-layer contact |
AT13014U1 (de) * | 2011-12-06 | 2013-04-15 | Extraflame S P A | Vorrichtung und verfahren zum ermitteln der luftströmung in raumheizungsgeräten |
DE102012009421A1 (de) * | 2012-05-11 | 2013-11-14 | E + E Elektronik Ges.M.B.H. | Strömungssensor |
DE102014202853A1 (de) * | 2014-02-17 | 2015-08-20 | Robert Bosch Gmbh | Sensoranordnung zur Bestimmung wenigstens eines Parameters eines durch einen Kanal strömenden fluiden Mediums |
DE102014217870A1 (de) * | 2014-09-08 | 2016-03-10 | Robert Bosch Gmbh | Sensoranordnung zur Bestimmung wenigstens eines Parameters eines durch einen Messkanal strömenden fluiden Mediums |
DE102015206677A1 (de) * | 2015-04-14 | 2016-10-20 | Robert Bosch Gmbh | Sensor zur Bestimmung wenigstens eines Parameters eines durch einen Messkanal strömenden fluiden Mediums |
DE102015219501A1 (de) * | 2015-10-08 | 2017-04-13 | Robert Bosch Gmbh | Sensorvorrichtung zur Erfassung mindestens einer Strömungseigenschaft eines fluiden Mediums |
DE102015225358B4 (de) * | 2015-12-16 | 2020-04-02 | Continental Automotive Gmbh | Luftmassenmesser |
JP6416357B1 (ja) * | 2017-10-05 | 2018-10-31 | 三菱電機株式会社 | 流量測定装置 |
DE112020000176T5 (de) * | 2019-03-04 | 2021-08-19 | Hitachi Astemo, Ltd. | Detektionsvorrichtung für eine physikalische Größe |
JP7162961B2 (ja) * | 2019-03-04 | 2022-10-31 | 日立Astemo株式会社 | 流量測定装置 |
JP7225062B2 (ja) * | 2019-08-29 | 2023-02-20 | 日立Astemo株式会社 | センサ装置 |
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EP0685713A2 (de) * | 1994-05-30 | 1995-12-06 | Hitachi, Ltd. | Thermische Vorrichtung zum Messen der Luftströmung in einer Brennkraftmaschine |
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JPS62123318A (ja) * | 1985-08-13 | 1987-06-04 | Nippon Soken Inc | 直熱型流量センサ |
US4844882A (en) * | 1987-12-29 | 1989-07-04 | Molecular Biosystems, Inc. | Concentrated stabilized microbubble-type ultrasonic imaging agent |
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DE4441874A1 (de) | 1994-11-24 | 1996-05-30 | Bosch Gmbh Robert | Vorrichtung zur Messung der Masse eines strömenden Mediums |
DE19524634B4 (de) | 1995-07-06 | 2006-03-30 | Robert Bosch Gmbh | Vorrichtung zur Messung der Masse eines strömenden Mediums |
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DE19643996A1 (de) * | 1996-10-31 | 1998-05-07 | Bosch Gmbh Robert | Vorrichtung zur Messung der Masse eines strömenden Mediums |
DE19735891A1 (de) * | 1997-08-19 | 1999-02-25 | Bosch Gmbh Robert | Meßvorrichtung zum Messen der Masse eines in einer Leitung strömenden Mediums |
DE19743409A1 (de) | 1997-10-01 | 1999-04-08 | Bosch Gmbh Robert | Meßvorrichtung zur Messung der Masse eines strömenden Mediums |
DE19744997A1 (de) * | 1997-10-11 | 1999-04-15 | Bosch Gmbh Robert | Vorrichtung zur Messung der Masse eines strömenden Mediums |
JP3416526B2 (ja) * | 1998-05-21 | 2003-06-16 | 三菱電機株式会社 | 感熱式流量センサ |
JP2000002573A (ja) * | 1998-06-15 | 2000-01-07 | Unisia Jecs Corp | 気体流量計測装置 |
JP3475853B2 (ja) | 1998-12-21 | 2003-12-10 | 三菱電機株式会社 | 流量測定装置 |
DE19927818C2 (de) * | 1999-06-18 | 2003-10-23 | Bosch Gmbh Robert | Vorrichtung zur Messung der Masse eines strömenden Mediums |
JP3587734B2 (ja) * | 1999-06-30 | 2004-11-10 | 株式会社日立製作所 | 熱式空気流量センサ |
DE19939824A1 (de) * | 1999-08-21 | 2001-02-22 | Bosch Gmbh Robert | Vorrichtung zur Messung der Masse eines strömenden Mediums |
-
2000
- 2000-07-26 DE DE10036290A patent/DE10036290A1/de not_active Withdrawn
-
2001
- 2001-07-20 AU AU79567/01A patent/AU774511B2/en not_active Ceased
- 2001-07-20 JP JP2002514345A patent/JP5231704B2/ja not_active Expired - Fee Related
- 2001-07-20 BR BR0107032-0A patent/BR0107032A/pt not_active IP Right Cessation
- 2001-07-20 CZ CZ20021024A patent/CZ20021024A3/cs unknown
- 2001-07-20 US US10/089,258 patent/US6820479B2/en not_active Expired - Lifetime
- 2001-07-20 CN CNB018021794A patent/CN100432632C/zh not_active Expired - Fee Related
- 2001-07-20 KR KR1020027003853A patent/KR100866267B1/ko not_active IP Right Cessation
- 2001-07-20 EP EP01957727A patent/EP1204847A1/de not_active Withdrawn
- 2001-07-20 WO PCT/DE2001/002761 patent/WO2002008701A1/de active IP Right Grant
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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EP0685713A2 (de) * | 1994-05-30 | 1995-12-06 | Hitachi, Ltd. | Thermische Vorrichtung zum Messen der Luftströmung in einer Brennkraftmaschine |
DE19828629A1 (de) * | 1997-06-26 | 1999-02-04 | Hitachi Ltd | Thermischer Luftmengenmesser, Luftansaugsystem für Verbrennungsmotor und Steuersystem für diesen Verbrennungsmotor |
Non-Patent Citations (1)
Title |
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See also references of WO0208701A1 * |
Also Published As
Publication number | Publication date |
---|---|
US20030037610A1 (en) | 2003-02-27 |
CZ20021024A3 (cs) | 2002-06-12 |
AU774511B2 (en) | 2004-07-01 |
BR0107032A (pt) | 2002-06-11 |
CN100432632C (zh) | 2008-11-12 |
DE10036290A1 (de) | 2002-02-07 |
JP2004505235A (ja) | 2004-02-19 |
CN1386190A (zh) | 2002-12-18 |
AU7956701A (en) | 2002-02-05 |
JP5231704B2 (ja) | 2013-07-10 |
US6820479B2 (en) | 2004-11-23 |
KR20020042842A (ko) | 2002-06-07 |
WO2002008701A1 (de) | 2002-01-31 |
KR100866267B1 (ko) | 2008-11-03 |
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