EP2072761A2 - Dispositif de mesure de pression - Google Patents

Dispositif de mesure de pression Download PDF

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Publication number
EP2072761A2
EP2072761A2 EP08170228A EP08170228A EP2072761A2 EP 2072761 A2 EP2072761 A2 EP 2072761A2 EP 08170228 A EP08170228 A EP 08170228A EP 08170228 A EP08170228 A EP 08170228A EP 2072761 A2 EP2072761 A2 EP 2072761A2
Authority
EP
European Patent Office
Prior art keywords
measuring device
pressure measuring
channel
sensor element
volume
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Withdrawn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
EP08170228A
Other languages
German (de)
English (en)
Other versions
EP2072761A3 (fr
Inventor
Dirk Hofmann
Eduard Weiss
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.)
BMTS Technology GmbH and Co KG
Original Assignee
Bosch Mahle Turbo Systems GmbH and Co KG
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 Bosch Mahle Turbo Systems GmbH and Co KG filed Critical Bosch Mahle Turbo Systems GmbH and Co KG
Publication of EP2072761A2 publication Critical patent/EP2072761A2/fr
Publication of EP2072761A3 publication Critical patent/EP2072761A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D17/00—Regulating or controlling by varying flow
    • F01D17/02—Arrangement of sensing elements
    • F01D17/08—Arrangement of sensing elements responsive to condition of working-fluid, e.g. pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2220/00—Application
    • F05D2220/40—Application in turbochargers

Definitions

  • DE 102 02 322 A1 refers to an internal combustion engine with an exhaust gas turbocharger and a method for operating such an internal combustion engine.
  • the internal combustion engine includes an exhaust gas turbocharger having a compressor and a turbine. Their geometry is variable, and a turbine bypassing bypass is provided, in which a wastegate valve controls the flow.
  • a pressure sensor is provided which determines the pressure in or upstream of the turbine and transmits it to an electronic control unit. This controls when a predetermined limit value for the pressure of the turbine geometry such that damage to the turbine is excluded.
  • the pressure sensor is provided within a turbine housing upstream of a turbine wheel of the turbine.
  • the pressure sensor can also be installed in an exhaust pipe between turbine and internal combustion engine.
  • DE 10 2005 056 517 A1 refers to a method for determining the speed of a compressor, in particular a turbocharger.
  • a method is proposed for determining the rotational speed of a compressor, in particular a turbocharger of an internal combustion engine, in which the pressure in a region downstream of the compressor is detected and a corresponding pressure signal is provided.
  • the speed of the compressor is obtained from a periodic fluctuation of at least a portion of the pressure signal.
  • the pressure is detected immediately downstream of the compressor.
  • the principle is based on detecting the pressure fluctuations caused by the individual blades of the compressor impeller.
  • a pressure measuring device in particular a pressure sensor, recessed and to connect it to a duct with a compressor volume, in particular of the compressor part of an exhaust gas turbocharger.
  • This solution can be realized, for example, by making the channel cylindrical.
  • the geometry of this channel is adapted to the respective installation situation and is usually designed in such a way that the frequency ranges to be expected at the respective compressor part of an exhaust-gas turbocharger are taken into account for the pulsations which are to be detected by the pressure-measuring device.
  • the channel can be designed in a simple embodiment, for example as a funnel.
  • An improved embodiment lies in a channel whose walls have a contour which corresponds to the course of the exponential function.
  • the core idea underlying the invention is to arrange the pressure measuring device, in particular the pressure sensor, recessed with respect to a boundary wall.
  • the pressure measuring device which is designed in particular as a pressure sensor, is arranged with respect to the compressor housing, which is formed for example as a spiral housing, set back in relation to the boundary wall in the housing.
  • the channel may be formed as a funnel-shaped connecting channel, further, a recess in which the pressure measuring device, in particular configured as a pressure sensor, in the compressor housing (volute) of the compressor part the exhaust gas turbocharger is arranged to be provided with an additional heat sink, or the pressure measuring device itself have an additional heat sink.
  • the pressure measuring device which is designed in particular as a pressure sensor, set back with respect to the housing wall the compressor housing (spiral housing) of the compressor part is arranged and communicates via a continuously tapered connecting channel with the gas volume whose pulsations are to be measured, in connection.
  • the walls bounding the connecting channel are curved in accordance with an exponential function.
  • the inventively proposed solution can be achieved on the one hand, that the temperature, which is exposed to the pressure measuring device, in particular designed as a pressure sensor, considerably below the temperature level in the order of 200 ° C, at which damage could occur. Furthermore, it can be achieved by the solution proposed according to the invention that the pulsation signal of the gas volume is transmitted to the sensor element, in particular the pressure sensor, with as little damping as possible.
  • the representation in FIG. 1 is a compressor part of a trained as exhaust gas turbocharger charging device to remove.
  • FIG. 1 shows a charging device 10, which is designed in particular as an exhaust gas turbocharger, a compressor part 12.
  • the compressor part 12 in turn comprises a compressor impeller 19 which rotates about its axis and a in FIG. 1 not shown shaft is driven by a turbine part of the preferably designed as an exhaust gas turbocharger charging device 10.
  • the compressor impeller 19 rotates about the axis and compresses incoming air 18 from an inlet pressure p 1 to an outlet pressure p 2 .
  • the air heats up to a temperature at the exit from the compressor impeller 19, which is on the order of 200 ° C.
  • the outlet pressure p 2 and the outlet temperature just mentioned the compressed air enters a volume 22 of the compressor part 12.
  • a diffuser channel 20 is executed, which opens into a volute 14, as which the compressor housing is preferably carried out.
  • a pressure measuring device 24 is inserted in the wall 16, which limits the compressor housing 14 in the region of the volume 22 of compressed air.
  • This comprises at least one signal line 26, via which a in accordance with the representation in FIG. 1 only schematically indicated sensor element 25 with an evaluation or an engine control unit or the like is in communication.
  • FIG. 2 shows the installation conditions of the pressure sensor in the compressor housing of the charging device in an enlarged scale.
  • FIG. 2 shows that the pressure measuring device 24 is inserted.
  • the pressure measuring device 24 comprises a signal line 26 running within the housing, via which the sensor element 25 is contacted.
  • FIG. 2 shows that the sensor element 25 is located approximately in the plane of the wall 16, which encloses the volume 22.
  • the volume 22 is - as in FIG. 1 already described - the compressed fresh air, which exits the compressor impeller 19 of the compressor part 12 with the state p 2 , ⁇ 2 . This means that in FIG.
  • FIG. 3 shows a first embodiment of the invention proposed solution.
  • FIG. 3 In contrast to the previously described FIG. 2 is in accordance with the invention according to the solution proposed in the first embodiment FIG. 3 the pressure measuring device designed as a recessed sensor element 34 with respect to the volume 22 limiting wall 16.
  • a distance 44 - indicated by the double arrow in FIG. 3 - prevails.
  • the sensor element 34 arranged backward from the mouth of the channel 36 is no longer directly exposed to the volume (p 2 , ⁇ 2 , as described above) but is protected by the channel 36, in particular from the elevated temperature of the volume 22.
  • the in FIG. 3 shown channel 36, which connects the volume 22 and designed as a recessed sensor element 34 pressure measuring device, is cylindrical.
  • the mouth of the cylindrically shaped channel 36 is preferably provided in the wall 16 with a rounded inlet to direct the flow as unattenuated and unfiltered on the executed as a recessed sensor element 34 pressure measuring device.
  • the housing of the pressure measuring device 24 has a recess 30, in which the electronics of the pressure measuring device is housed.
  • Reference numeral 38 designates the cylindrical shape of the channel 36 for the application of the set back arranged sensor element 34 with the volume 22, the gas dynamics is to be sensed.
  • FIG. 4 shows a further embodiment of the proposed solution according to the invention.
  • the pressure measuring device designed as a set back sensor element 34 with the volume 22 whose gas dynamics is to be sensed is likewise connected via the channel 36, which has a funnel shape 40.
  • channel walls 42 of channel 36 in funnel shape 40 include a cone angle with respect to each other.
  • the channel 36 in funnel shape 40 may have a circular cross-section which tapers continuously from the mouth of the channel 36 in the wall 16 in the direction of the recessed arranged sensor element 34 of the pressure measuring device 24.
  • the distance at which the pressure measuring device designed as set backwards sensor element 34 is arranged in the wall 16 with respect to the mouth of the funnel-shaped channel 36 is indicated by reference numeral 44.
  • FIG. 5 is a further embodiment of the present invention proposed pressure measuring device.
  • FIG. 5 shows that the pressure measuring device designed as set backwards is likewise arranged at a distance 44 with respect to the mouth of the channel 36 in funnel shape 40.
  • the channel 36 which extends through the wall 16 of the compressor housing 14 of the compressor part 12 in the direction of the recess 30 of the pressure measuring device 24, has a continuously tapering cross-section.
  • the pressure measuring device 24 is cooled by a number of cooling fins 46.
  • the cooling ribs 46 instead of the cooling ribs 46, at least one heat sink in a geometry other than the rib shape of the pressure measuring device 24 can also be assigned.
  • An arrangement of a heat sink 46 or of cooling fins 46 offers the possibility of even further lowering the temperature level to which the pressure measuring device designed as a recessed sensor element 34 is subjected.
  • funnel shape 40 shown may be embodied in a cone angle of 15, 20 or more degrees of angle to channel walls 42 arranged to each other and advantageously enables the transmission of a pulsation signal with the least possible attenuation from the volume 22 to the recessed at the end of the channel 36 in funnel shape 40 arranged sensor element 34.
  • the geometry data of the channel 36 in funnel shape 40 are chosen so that this usually the respective compressor part 12 of the charging device 10 expected frequency range for take into account the pulsations that are detected with the pressure measuring device designed as a set-back sensor element 34.
  • FIG. 6 shows a further embodiment of the invention proposed pressure measuring device with a connecting channel in exponential form.
  • FIG. 6 extends between the volume 22 delimiting wall 16 of the compressor housing 14 and arranged as set back sensor element 34 pressure measuring device of the channel 36, on the one hand, based on its mouth point in the wall 16, in the direction of the recessed arranged sensor element 34 a continuous cross-sectional tapering 48 and on the other hand 52 corresponding rounded expansible walls 50 in corresponding exponential form.
  • a particularly low-attenuation transmission of the pulsations of the volume 22 takes place in the channel 36 having rounded walls 50 in accordance with the exponential form 52 which in connection with the FIGS.
  • the "exponential channel” represents an embodiment of the channel 36, which also has a recessed to the rearwardly disposed sensor element 34 continuously cross-section 48.
  • the pressure measuring device designed as a recessed sensor element 34 is executed symmetrically to the axis of symmetry 54 and also makes it possible to arrange the pressure measuring device designed as a recessed sensor element 34 at a distance 44 from the mouth of the wall 16.
  • the distance 44 around which the pressure-measuring device designed as a recessed sensor element 34 is located refers to the side of the wall 16 which is assigned to the volume 22. Because of the rounded walls 50, an almost undamped transmission of the gas dynamics or of pulsations within the volume 22 can be transmitted substantially loss-free to the recessed sensor element 34, which is a preferred Embodiment of the present invention proposed pressure measuring device represents.
  • the exponential channel is identified by reference numeral 52 and is significantly characterized by the exponential function following rounded walls 50 on the one hand and by the continuously tapering cross-section 48 on the other.
  • the heat sink 46 may be formed in rib shape or be formed by the housing or parts of this, in order to achieve an additional temperature reduction can.
  • the pressure measuring device according to the invention which is designed as a backward-arranged sensor element 34, is preferably accommodated in a channel whose damping is minimized by the channel geometry.
  • a funnel shape 40 with circular cross-sectional tapering 48 can also be used in the direction of the sensor element 34 of the pressure measuring device arranged at a distance 44 from the wall 16 24 can be achieved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Measuring Fluid Pressure (AREA)
EP08170228A 2007-12-21 2008-11-28 Dispositif de mesure de pression Withdrawn EP2072761A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200710062185 DE102007062185A1 (de) 2007-12-21 2007-12-21 Druckmesseinrichtung

Publications (2)

Publication Number Publication Date
EP2072761A2 true EP2072761A2 (fr) 2009-06-24
EP2072761A3 EP2072761A3 (fr) 2010-10-20

Family

ID=40430018

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08170228A Withdrawn EP2072761A3 (fr) 2007-12-21 2008-11-28 Dispositif de mesure de pression

Country Status (2)

Country Link
EP (1) EP2072761A3 (fr)
DE (1) DE102007062185A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10202322A1 (de) 2002-01-23 2003-07-31 Daimler Chrysler Ag Brennkraftmaschine mit einem Abgasturbolader und Verfahren zum Betrieb einer solchen Brennkraftmaschine
DE102005056517A1 (de) 2005-11-28 2007-05-31 Robert Bosch Gmbh Verfahren zur Bestimmung der Drehzahl eines Verdichters, insbesondere eines Turboladers

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19840098A1 (de) * 1998-09-03 2000-03-09 Asea Brown Boveri Verfahren und Vorrichtung zur Schubentlastung eines Turboladers
US6293103B1 (en) * 2000-09-21 2001-09-25 Caterpillar Inc. Turbocharger system to inhibit reduced pressure in intake manifold
DE10059701A1 (de) * 2000-12-01 2002-06-06 Alstom Switzerland Ltd Sonde zur Messung von Druckschwingungen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10202322A1 (de) 2002-01-23 2003-07-31 Daimler Chrysler Ag Brennkraftmaschine mit einem Abgasturbolader und Verfahren zum Betrieb einer solchen Brennkraftmaschine
DE102005056517A1 (de) 2005-11-28 2007-05-31 Robert Bosch Gmbh Verfahren zur Bestimmung der Drehzahl eines Verdichters, insbesondere eines Turboladers

Also Published As

Publication number Publication date
EP2072761A3 (fr) 2010-10-20
DE102007062185A1 (de) 2009-06-25

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