WO2008068098A1 - Procédé et dispositif de préparation de signaux de détection en vue de la mesure inductive de la vitesse de rotation d'un turbocompresseur - Google Patents

Procédé et dispositif de préparation de signaux de détection en vue de la mesure inductive de la vitesse de rotation d'un turbocompresseur Download PDF

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Publication number
WO2008068098A1
WO2008068098A1 PCT/EP2007/060990 EP2007060990W WO2008068098A1 WO 2008068098 A1 WO2008068098 A1 WO 2008068098A1 EP 2007060990 W EP2007060990 W EP 2007060990W WO 2008068098 A1 WO2008068098 A1 WO 2008068098A1
Authority
WO
WIPO (PCT)
Prior art keywords
sensor
signal
speed
turbocharger
turbocharger speed
Prior art date
Application number
PCT/EP2007/060990
Other languages
German (de)
English (en)
Inventor
Markus Gilch
Stephan Heinrich
Torsten Reitmeier
Original Assignee
Continental Automotive Gmbh
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 Continental Automotive Gmbh filed Critical Continental Automotive Gmbh
Publication of WO2008068098A1 publication Critical patent/WO2008068098A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/487—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by rotating magnets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2220/00—Application
    • F05B2220/40—Application in turbochargers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2270/00—Control
    • F05B2270/30—Control parameters, e.g. input parameters
    • F05B2270/304—Spool rotational speed

Definitions

  • the present invention relates to a method and apparatus for signal conditioning of sensor output signals in the inductive measurement of a turbocharger speed in a supercharged internal combustion engine.
  • eddy-current-based sensors are used for measuring the speed of turbochargers, in which a coil embedded in a sensor housing is flowed through by a high-frequency alternating current. The resulting electromagnetic field is dampened as each turbocharger blade approaches so that each blade of the turbocharger generates a pulse.
  • An associated controller determines a respective speed considering a respective number of blades of the respective turbocharger, which is usually between two to seventeen blades.
  • Such a speed sensor thus operates without contact and is wear-free as an eddy current measuring system and resistant to the usual contamination in the engine compartment by oil and dirt.
  • a simple bore on the compressor housing positions the sensor so that it can measure blade tip movement of the turbocharger wheel.
  • the compressor housing is usually made of aluminum, whereas the turbocharger blades are made of aluminum or titanium or titanium alloys with varying size and number of blades depending on the manufacturer.
  • These environmental conditions allow the advantageous use of Hall sensors or inductive sensors, wherein the field lines of a strong magnet of magnetic-field-sensitive sensors co-rotating on or in the turbocharger wheel are also conveyed through an aluminum wall in the region of an airborne sensor. inlet can be measured through.
  • An essential advantage of this measurement method over the former is that a simple attachment without any housing breakthrough and placement in the region of an air inlet at significantly lower temperature load of the actual sensor is possible. With inductive sensors achieved in this second measurement method even with several millimeters wall thickness, a large range increase compared to Hall sensor based measurement systems.
  • the rotating magnet in the coil sensor generates a voltage which has a sinusoidal profile over a closed revolution.
  • Usual voltage amplitudes are 80 mV to 200 mV, but amplitudes of up to approx. 20 mV can still be reliably evaluated. Amplitudes below this value can no longer be reliably evaluated due to disturbances and / or noise.
  • a method according to the invention is characterized in that an output signal generated in a sensor is first filtered with a low-pass filter in order to only contain the components of a frequency of less than approximately 6 kHz which are relevant for a speed determination. This filters out known interference. The amplitude fluctuations of this filtered sine signal or signal mixture are converted into a defined rectangular signal, preferably using a comparator circuit. Accordingly, an apparatus according to the invention for establishing an interface has a low-pass filter with a cut-off frequency at approximately 6 kHz, the output of which is connected to a sine-wave converter. According to a preferred embodiment, a Schmitt trigger is used as a sine-square converter.
  • Figure 1 is a block diagram of a basic structure of an inductive sensor system for turbocharger speed measurement with exemplary output signals
  • FIG. 2 shows an enlarged illustration of the signal output scheme of FIG. 1 for the representation of error influences and faults
  • Figure 3 an example circuit as a device for implementing a method according to the invention for the creation of a normalized interface.
  • FIG. 1 shows a block diagram of an inductive sensor arrangement 1.
  • an inductive sensor 2 senses a magnetic field 3 of a magnet 5 rigidly fixed in a turbocharger impeller 4 or its change.
  • a quasi-sinusoidal signal mixture is forwarded from the sensor 2 via a feed line or pig tail 6 to a subsequent evaluation electronics 7 over a distance 1 of about 200 to about 300 mm in length.
  • a head 8 of the sensor 2 has a diameter of six to eight millimeters and is disposed at a distance d of 15 to 30 mm from the magnet 5 and its center, respectively.
  • the maximum temperatures of about 230 0 C at the transmitter sorgephase and 180 0 C at the coil of the sensor 2 on the one hand and 125 0 C the transmitter 7 and 150 0 C of the associated housing to make a physical separation of these components is required.
  • the maximum short-term temperature load for the winding of the sensor 2 is in the present case about 230 0 C and about 150 0 C for the transmitter 7. This derived from thermal considerations requirement is reflected in the size of the length 1 of about 200 to about 300 mm as a distance between the sensor 2 and the transmitter 7 again.
  • FIG. 2 shows an enlarged representation of the signal output scheme of FIG. 1 with the signal IN for representing error influences S1, S2, S3, which due to their different time occurrences could cause disturbances in the signal evaluation of the evaluation electronics 7.
  • FIG. 3 shows a block diagram of an example circuit as a device for implementing a method according to the invention, through which a normalized interface is provided.
  • the Input signal IN as the output signal of the sensor 2 is fed via conventional electrical wiring to an operational amplifier OP, from which the amplified signal is supplied to a low-pass filter TP via a polarity reversal protection.
  • a normalized and substantially rectangular output signal OUT a signal of the form sketched in FIG. 2 is then available for determining a rotational speed n of the turbocharger wheel 4.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Supercharger (AREA)

Abstract

La présente invention concerne un procédé et un dispositif de préparation des signaux de sortie d'un détecteur dans la mesure inductive de la vitesse de rotation d'un turbocompresseur d'un moteur à combustion interne. Pour créer avec un procédé et un dispositif une interface qui permet une combinaison sans parasite de différents détecteurs et de différentes commandes de moteur qui forment des modules en général largement séparés les uns des autres dans l'espace, l'invention propose de d'abord filtrer par un filtre passe-bas (TP) un signal de sortie (IN) délivré par un détecteur (2) de telle sorte que le signal ne contienne plus que les composantes d'une fréquence inférieure à environ 6 kHz, pertinentes pour la détermination de la vitesse de rotation. Grâce à un circuit comparateur ou à une gâchette de Schmitt, le signal sinusoïdal filtré est converti en un signal rectangulaire (OUT) défini. Le filtre passe-bas (TP) et la gâchette de Schmitt sont situés dans l'électronique d'évaluation (7).
PCT/EP2007/060990 2006-12-05 2007-10-16 Procédé et dispositif de préparation de signaux de détection en vue de la mesure inductive de la vitesse de rotation d'un turbocompresseur WO2008068098A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610057318 DE102006057318A1 (de) 2006-12-05 2006-12-05 Verfahren und Vorrichtung zur Signalaufbereitung von Sensorsignalen zur induktiven Messung einer Turboladerdrehzahl
DE102006057318.8 2006-12-05

Publications (1)

Publication Number Publication Date
WO2008068098A1 true WO2008068098A1 (fr) 2008-06-12

Family

ID=39111644

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/060990 WO2008068098A1 (fr) 2006-12-05 2007-10-16 Procédé et dispositif de préparation de signaux de détection en vue de la mesure inductive de la vitesse de rotation d'un turbocompresseur

Country Status (2)

Country Link
DE (1) DE102006057318A1 (fr)
WO (1) WO2008068098A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11053875B2 (en) 2016-02-10 2021-07-06 Garrett Transportation I Inc. System and method for estimating turbo speed of an engine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS568552A (en) * 1979-07-02 1981-01-28 Toyota Motor Corp Revolving speed detector for turbo-charger
DE19640760A1 (de) * 1996-10-02 1998-04-09 Bosch Gmbh Robert Schaltungsanordnung für einen induktiven Sensor mit zwei getrennt angeordneten Gebern
EP0952454A1 (fr) * 1998-04-23 1999-10-27 DaimlerChrysler AG Dispositif de détection de vitesse de rotation pour des turbocompresseurs

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3115237A1 (de) * 1981-04-15 1982-11-04 Robert Bosch Gmbh, 7000 Stuttgart Induktive geberanordnung
DE3743958A1 (de) * 1987-12-23 1989-07-13 Siemens Ag Messeinrichtung zur messung des drehverhaltens eines objekts in einem fahrzeug

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS568552A (en) * 1979-07-02 1981-01-28 Toyota Motor Corp Revolving speed detector for turbo-charger
DE19640760A1 (de) * 1996-10-02 1998-04-09 Bosch Gmbh Robert Schaltungsanordnung für einen induktiven Sensor mit zwei getrennt angeordneten Gebern
EP0952454A1 (fr) * 1998-04-23 1999-10-27 DaimlerChrysler AG Dispositif de détection de vitesse de rotation pour des turbocompresseurs

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11053875B2 (en) 2016-02-10 2021-07-06 Garrett Transportation I Inc. System and method for estimating turbo speed of an engine

Also Published As

Publication number Publication date
DE102006057318A1 (de) 2008-06-12

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