WO2016087114A1 - Procédés d'étalonnage d'une soupape de régulation - Google Patents

Procédés d'étalonnage d'une soupape de régulation Download PDF

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Publication number
WO2016087114A1
WO2016087114A1 PCT/EP2015/074287 EP2015074287W WO2016087114A1 WO 2016087114 A1 WO2016087114 A1 WO 2016087114A1 EP 2015074287 W EP2015074287 W EP 2015074287W WO 2016087114 A1 WO2016087114 A1 WO 2016087114A1
Authority
WO
WIPO (PCT)
Prior art keywords
control valve
throughput
measured
voltage
calibrating
Prior art date
Application number
PCT/EP2015/074287
Other languages
German (de)
English (en)
Inventor
Osman Sari
Stefan Vitt
Original Assignee
Pierburg 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 Pierburg Gmbh filed Critical Pierburg Gmbh
Priority to EP15794084.2A priority Critical patent/EP3227639A1/fr
Publication of WO2016087114A1 publication Critical patent/WO2016087114A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D3/00—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups
    • G01D3/02—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups with provision for altering or correcting the law of variation
    • G01D3/022—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups with provision for altering or correcting the law of variation having an ideal characteristic, map or correction data stored in a digital memory
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0025—Electrical or magnetic means
    • F16K37/0033—Electrical or magnetic means using a permanent magnet, e.g. in combination with a reed relays
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0075—For recording or indicating the functioning of a valve in combination with test equipment
    • F16K37/0083—For recording or indicating the functioning of a valve in combination with test equipment by measuring valve parameters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0075—For recording or indicating the functioning of a valve in combination with test equipment
    • F16K37/0091—For recording or indicating the functioning of a valve in combination with test equipment by measuring fluid parameters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D18/00—Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00
    • G01D18/002—Automatic recalibration

Definitions

  • the invention relates to a method for calibrating a control valve with a permanent magnet, which is moved with a control body of the control valve, and a fixedly arranged in a housing of the control valve non-contact position sensor in which a voltage is generated, which depends on the magnetic field acting on it of the permanent magnet is.
  • a calibration of control valves with contactless sensors are carried out in order to be able to assign desired parameters of the process to be controlled to the output values of the sensors.
  • the voltage value of the position sensor which is present at this position is usually assigned to the two end positions of the valve during the calibration. These two points are linearly connected to each other, with the resulting line serves as a position / voltage characteristic.
  • each voltage generated at the position sensor by adjusting the control element of the control valve is associated with a flow rate of the control valve, creates a direct relationship between the output value of the sensor and the actual value to be controlled of a control valve. This increases the control accuracy and shortens the necessary control times during operation.
  • different voltages are generated at the position sensor by adjusting the control body of the control valve, the existing at the respective voltages throughput is then measured and the pairs of values thus generated serve as support points for generating a throughput / voltage characteristic by connecting the support points.
  • the distances between the various voltages applied can be arbitrary are chosen small, with decreasing distance, the accuracy increases.
  • the position closing off the channel results in significantly greater throughput changes than in the region of the other end position.
  • On an additional mass flow sensor in the channel of the control valve can be dispensed with, since readjustment is not required.
  • a plurality of throughput / voltage characteristics for different pressure differences are generated for additional improvement of the control.
  • the corresponding characteristic curve for determining the throughput can be selected, whereby the accuracy is further increased.
  • the throughput / voltage characteristic is stored in a control unit of the control valve, so that the characteristic curve does not have to be learned separately from an external control, but the finished calibrated valve can be delivered.
  • the associated throughput for determining the characteristic curve is measured by means of an anemometric air mass meter.
  • air mass sensors With these air mass sensors, throughputs can be measured with a very high accuracy and reproducibility, so that the generated characteristic also has a high accuracy.
  • a sensor can be used for the calibration of a variety of control valves, since it is virtually no wear when used in clean gas.
  • the gas flow for calibration is preferably generated by means of a vacuum pump. This may be, for example, a rotary vane pump or the like. This generates a uniform volume flow, so that again the accuracy of the calibration is improved.
  • a verification of the throughput voltage characteristic is carried out during operation of the control valve by measuring the flow rates occurring during operation by means of a mass flow sensor, which is arranged in the controlled by the control valve channel and its measured flow rate measured with the the measured voltages of the position sensor corresponding throughputs are compared according to the throughput voltage characteristic.
  • This comparison can be used for fault detection or for readjustment, for example in the case of aging magnets.
  • a method for calibrating a control valve that increases the accuracy and control speed of a control valve during operation. It can either be completely dispensed with additional components to check the desired throughput or these components can be used for recalibration to perform over the entire life of a particularly fast control can.
  • FIG. 1 shows a schematic representation of a test bench for calibration.
  • Figure 2 shows a schematic representation of an arrangement of an exhaust gas recirculation valve in an exhaust gas recirculation channel.
  • FIG. 3 shows a characteristic which was determined according to the prior art.
  • FIG. 4 shows measured throughput curves in comparison to the determined characteristic curve according to FIG. 3.
  • FIG. 5 shows a characteristic curve generated by the method according to the invention.
  • FIG. 6 shows measured throughput curves in comparison to the determined characteristic curve according to FIG. 5.
  • the calibration device shown in FIG. 1 consists of a computer 10 to which a calibration device 12 is connected. This is electrically connected to a non-contact magnetoresistive position sensor 14, which is arranged in a known manner in a housing, not shown, of an exhaust gas recirculation valve 16. At the end of a valve rod 18 of the exhaust gas recirculation valve 16, a permanent magnet 20 is fixed, the magnetic field acts on the position sensor 14, in which a voltage is generated by the magnetic field, which is dependent on the relative position of the permanent magnet 20 to the position sensor 14.
  • the exhaust gas recirculation valve 16 is arranged in a channel 22 such that by changing the position of a fixed to the valve rod 18 control body 24, the free available flow area in the channel 22 and with this movement, the voltage generated in the position sensor 14 is changed. This means that for each position of the control body 24, an associated voltage at the position sensor 14 can be measured, which is stored in the computer 10.
  • the calibration device additionally has a vacuum pump 26, which generates a driving pressure gradient for generating a flow in the channel 22.
  • the differential pressure generated by the vacuum pump 26 is measured by means of a pressure sensor 28 arranged upstream of the exhaust gas recirculation valve 16 and a pressure sensor 30 arranged downstream of the exhaust gas recirculation valve 16, the values of which are supplied to the calibration device 12.
  • an air mass sensor 32 is arranged, which after the anemometric Principle works and determined by the conveyed through the channel 22 air mass and also the calibration device 12 is supplied.
  • the vacuum pump 26 is set to a fixed value and changed the position of the control body 24 of the exhaust gas recirculation valve 16 in defined steps, wherein in each position of the control body 24, the voltage generated at the position sensor 14 and measured at the air mass sensor 32 throughput measured and the calibration device 12th get saved.
  • each measured voltage value can be assigned a specific throughput.
  • These support points 50 are connected to each other to generate a throughput / voltage characteristic 40 over the total stroke.
  • the resulting throughput / voltage characteristic 40 is then stored in a control unit 33 of the exhaust gas recirculation valve 16 or in an engine control of an internal combustion engine 34. If appropriate, this measurement can be carried out for several different differential pressures generated by the vacuum pump 26, so that a family of characteristics is generated.
  • FIG. 2 shows an internal combustion engine 34 with exhaust gas recirculation.
  • the exhaust gas recirculation valve 16 disposed in the exhaust gas recirculation passage 36 has been calibrated in accordance with the above. If a certain exhaust gas mass flow to be returned is then requested by an ECU 33 during operation of the internal combustion engine 34, the control body 24 of the exhaust gas recirculation valve 16 is moved by an electromotive actuator 38 in accordance with the characteristic 40 generated by the calibration process until the value of the voltage output by the position sensor 14 requested throughput.
  • a pressure difference across the exhaust gas recirculation valve 16 can be measured, which corresponds to the applied pressure gradient in the exhaust gas recirculation passage 36, so that in each case from the family of characteristics to the corresponding pressure gradient belonging characteristic curve 40 is used for adjustment.
  • a mass flow sensor in the exhaust gas recirculation passage 36 can be omitted in this embodiment.
  • this system it is also possible to equip this system with an additional exhaust gas mass flow sensor 42.
  • the resulting exhaust gas mass flow can then be measured via this, so that a redundant system is produced in which the expected throughput is compared with the measured throughput. If the flow rate measured at the exhaust gas mass flow sensor 42 does not match the exhaust gas flow rate of the characteristic curve 40 determined in accordance with the voltage signal, an error can be inferred at the exhaust gas recirculation valve 16 or at the position sensor 14 or the exhaust gas mass flow sensor 42 if the deviation exceeds a defined threshold value.
  • Permanent magnets 20 are usually subject to aging, by which the magnetic field is weakened. If a deviation between the flow rate measured at the exhaust gas mass flow sensor 42 and the flow rate to be expected on the basis of the voltage value of the sensor 14 is within a defined range, this difference can also be used for recalibrating the position sensor 14 by the Characteristic 40 of the position sensor 14 is shifted according to this deviation. For this purpose, the comparison of the values of the exhaust gas mass flow sensor 42 with the values of the sensor 14 can be carried out either at defined time intervals or continuously.
  • FIG. 3 shows a characteristic 44, as it is known from the previously known State of the art is generated.
  • the two resulting pairs of values are connected to each other linearly.
  • the resulting characteristic curve 44 is stored in the control of the valve 16. It is assumed that the throughput at IV is 0 kg / h and at 4V the maximum throughput exists.
  • FIG. 4 shows the corresponding measured throughput voltage characteristic curve 46.
  • individual valve strokes can be approached via this characteristic 46, which results in the illustrated tolerance-related throughput. Due to the existing indirect connection, deviations of up to 20% result, which is unacceptable especially in the exhaust gas recirculation in gasoline engines.
  • FIG. 5 shows the throughput voltage characteristic curve 40 determined according to the method according to the invention, in which only three interpolation points 50 at IV, 2V and 4V were determined in the present exemplary embodiment.
  • the direct linkage results in tolerance ranges of only about 1% during operation, as shown in FIG.
  • the method according to the invention thus makes it possible to recirculate exhaust gas to the internal combustion engine very quickly and accurately without having to measure the exhaust gas flow directly if corresponding voltage-throughput characteristic curves are stored. It is also possible, during operation, to recalibrate these characteristic curves for faster activation, so that errors due to aging magnets can be ruled out.
  • the calibration is not limited to the calving device described.
  • the method can also be used successfully in other lift valves or flap valves in addition to the EGR valves described.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Technology Law (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Flow Control (AREA)

Abstract

L'invention concerne des procédés d'étalonnage d'une soupape de régulation (16) comportant un aimant permanent (20) déplacé au moyen d'un corps de régulation (24) de la soupape de régulation (16), et un capteur de position sans contact (14) disposé fixement dans un boîtier de la soupape de régulation (16), dans lequel une tension est produite, celle-ci dépendant du champ magnétique de l'aimant permanent (20) agissant sur le capteur de position. L'invention vise à réguler un flux de gaz avec une meilleure précision et une plus grande vitesse au moyen de la soupape de régulation. A cet effet, lors de l'étalonnage, un débit de la soupape de régulation (16) est associé à chaque tension produite sur le capteur de position (14) par déplacement du corps de régulation (24) de la soupape de régulation (16).
PCT/EP2015/074287 2014-12-05 2015-10-21 Procédés d'étalonnage d'une soupape de régulation WO2016087114A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15794084.2A EP3227639A1 (fr) 2014-12-05 2015-10-21 Procédés d'étalonnage d'une soupape de régulation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014117988.9A DE102014117988A1 (de) 2014-12-05 2014-12-05 Verfahren zur Kalibrierung eines Regelventils
DE102014117988.9 2014-12-05

Publications (1)

Publication Number Publication Date
WO2016087114A1 true WO2016087114A1 (fr) 2016-06-09

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EP (1) EP3227639A1 (fr)
DE (1) DE102014117988A1 (fr)
WO (1) WO2016087114A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0301568A2 (fr) * 1987-07-30 1989-02-01 Jiri Hokynar Appareil de commande pour débit de fluide
EP0858018A1 (fr) * 1997-02-06 1998-08-12 Georg Fischer Rohrleitungssysteme AG Méthode et dispositif pour la régulation du débit des fluides
EP1052387A2 (fr) * 1999-05-08 2000-11-15 DEUTZ Aktiengesellschaft Méthode de commande d'un dispositif de recirculation des gaz d'échappement pour un moteur à combustion interne
DE10017864A1 (de) * 2000-04-11 2001-10-18 Abb Patent Gmbh Verfahren und Anordnung zur Prüfung eines Wasserzählers
DE10065144A1 (de) * 2000-12-23 2002-07-11 Conti Temic Microelectronic Aktor mit einem Rotor drehenden elektromagnetischen Antrieb

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19540441A1 (de) * 1995-10-27 1997-04-30 Schubert & Salzer Control Syst Mikroprozessorgesteuerter Stellungsregler
DE69729863T2 (de) * 1996-05-20 2005-08-25 Borgwarner Inc., Auburn Hills Automatisches fluidkontrollsystem mit druckbalanziertem elektromagnetventil
DE10243412B4 (de) * 2002-09-18 2006-03-02 Kern Technik Gmbh & Co. Kg Hydraulikventilanordnung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0301568A2 (fr) * 1987-07-30 1989-02-01 Jiri Hokynar Appareil de commande pour débit de fluide
EP0858018A1 (fr) * 1997-02-06 1998-08-12 Georg Fischer Rohrleitungssysteme AG Méthode et dispositif pour la régulation du débit des fluides
EP1052387A2 (fr) * 1999-05-08 2000-11-15 DEUTZ Aktiengesellschaft Méthode de commande d'un dispositif de recirculation des gaz d'échappement pour un moteur à combustion interne
DE10017864A1 (de) * 2000-04-11 2001-10-18 Abb Patent Gmbh Verfahren und Anordnung zur Prüfung eines Wasserzählers
DE10065144A1 (de) * 2000-12-23 2002-07-11 Conti Temic Microelectronic Aktor mit einem Rotor drehenden elektromagnetischen Antrieb

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Publication number Publication date
EP3227639A1 (fr) 2017-10-11
DE102014117988A1 (de) 2016-06-09

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