EP2012003B1 - Procédé destiné à chauffer une bougie de préchauffage en céramique et appareil de commande de bougies de préchauffage - Google Patents

Procédé destiné à chauffer une bougie de préchauffage en céramique et appareil de commande de bougies de préchauffage Download PDF

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Publication number
EP2012003B1
EP2012003B1 EP08011197A EP08011197A EP2012003B1 EP 2012003 B1 EP2012003 B1 EP 2012003B1 EP 08011197 A EP08011197 A EP 08011197A EP 08011197 A EP08011197 A EP 08011197A EP 2012003 B1 EP2012003 B1 EP 2012003B1
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EP
European Patent Office
Prior art keywords
glow plug
voltage
heating
electric voltage
time
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.)
Active
Application number
EP08011197A
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German (de)
English (en)
Other versions
EP2012003A3 (fr
EP2012003A2 (fr
Inventor
Markus Kernwein
Jörg Stöckle
Olaf Dr. Toedter
Ganghua Ruan
Marc Rottner
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.)
BorgWarner Ludwigsburg GmbH
Original Assignee
BorgWarner Beru Systems GmbH
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Publication date
Application filed by BorgWarner Beru Systems GmbH filed Critical BorgWarner Beru Systems GmbH
Publication of EP2012003A2 publication Critical patent/EP2012003A2/fr
Publication of EP2012003A3 publication Critical patent/EP2012003A3/fr
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Publication of EP2012003B1 publication Critical patent/EP2012003B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P19/00—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition
    • F02P19/02—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs
    • F02P19/021—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs characterised by power delivery controls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P19/00—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P19/00—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition
    • F02P19/02—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
    • F02D2041/2051—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit using voltage control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P19/00—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition
    • F02P19/02—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs
    • F02P19/021—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs characterised by power delivery controls
    • F02P19/022—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs characterised by power delivery controls using intermittent current supply

Definitions

  • the invention relates to a method for heating a ceramic glow plug and a glow plug control device for carrying out such a method.
  • the object of the invention is to show a way how ceramic glow plugs can be heated as quickly as possible to their operating temperature and are charged as little as possible, so that their life is affected as little as possible by the heating.
  • This object is achieved by a method having the features specified in claim 1.
  • the object is further achieved by a glow plug control device according to claim 14, which is arranged such that it performs such a method during operation for heating a glow plug.
  • the applied voltage is gradually lowered in the course of the heating process, so that the electrical voltage decreases during the heating process in the time average.
  • the service life of ceramic glow plugs, in particular outside glow plugs can be increased by doing exactly the opposite.
  • the electrical voltage at the beginning of the heating process increases over time as a proportion of the time elapsed to the elapsed heating time.
  • the electrical voltage can be increased at the beginning of the heating, for example, steadily.
  • the voltage is increased in steps, in which case the height of the steps increases with increasing time and / or the width of the steps decreases with increasing time. In this way, during the heating phase for starting a motor results in a course of the electrical voltage, which increases disproportionately in the time average.
  • the inventive method is preferably initially applied a much lower starting voltage of, for example, 6 volts as the base value. Based on the base value, the electrical voltage is then increased up to a maximum value, which may be the value of the vehicle electrical system voltage.
  • the base value is preferably different from zero and is preferably at least 4 volts, in particular at least 5 volts.
  • the base value is controlled at the beginning of the process in a single jump from zero and reached, for example by a switch-on.
  • the surprisingly positive effect of the method according to the invention on the service life of ceramic glow plugs is attributed from today's point of view to the fact that form local current paths in the ceramic conductor of a ceramic glow plug, which may lead to local overheating and thus damage to the glow plug when applying too high a voltage.
  • the electrical resistance increases due to temperature, so that the electrical voltage without damage to the material can also be increased in order to achieve the fastest possible heating to the desired operating temperature.
  • the beginning of the heating process seems to be critical.
  • the voltage during the heating up to a maximum progressively increase and after reaching the maximum, possibly delayed, be lowered to a lower value sufficient to maintain the desired operating temperature.
  • the voltage at the beginning of the heating process can be increased gradually.
  • the electrical voltage remains constant at most in a time interval of 0.4 seconds, in particular at most of 0.2 seconds, particularly preferably in a time interval of at most 0.1 second, before it is increased in a subsequent time interval.
  • the electrical voltage is applied in a pulse width modulation method for short time slices, so that there is a course of an effective voltage, which may be a step function, a polygonal or parabolic example and increases in average overproportional to the elapsed heating time.
  • an effective voltage which may be a step function, a polygonal or parabolic example and increases in average overproportional to the elapsed heating time.
  • the electric voltage should increase but disproportionately to the elapsed heating time.
  • a continuous increase in the effective electric voltage can be achieved by the duration .DELTA.t 1 of the voltage pulses is increased and / or the duration of the lying between the voltage pulses breaks .DELTA.t 2 is reduced, the effective voltage Vrms at a time t as the voltage applied in the time average during a time interval voltage that has at least the length .DELTA.t 1 + .DELTA.t 2 and in the middle of the time t is calculated.
  • the effective electrical voltage is thus determined by calculating a time average over a sliding time interval.
  • the effective electrical voltage starting from a starting voltage as continuously as possible.
  • This can be done, for example, that the course of the electrical voltage is a polygon.
  • the traverse has at least 5 support points, in particular at least 8 support points, more preferably at least 12 support points. It is particularly advantageous if the course of the electrical voltage aproximates a continuously differentiable function and the course of the electrical voltage shows a strictly monotonically rising gradient. In particular, a parabolic rise in the electrical voltage is preferred.
  • a glow plug control device is set up such that it carries out the method according to the invention during operation for heating a glow plug.
  • at least 5 interpolation points of a nominal curve of the electrical voltage characteristic are stored in a memory of the glow plug control device during the heating process.
  • at least 8 support points of the desired curve are stored, which should follow the electrical voltage curve during the heating process.
  • the effective voltage Ueff applied to a ceramic glow plug for heating to operating temperature is plotted in volts over time t in seconds.
  • a starting voltage is applied, which is less than a vehicle electrical system voltage, which today is usually 12 volts.
  • the starting voltage is selected as the base value, which is greater than zero, and preferably achieved in one jump.
  • a method for heating a ceramic glow plug to its operating temperature for starting an engine is realized.
  • a variable voltage is applied to the glow plug, wherein the electric voltage, starting from a base value in the time average increases disproportionately to the elapsed heating time until a maximum value is reached.
  • FIG. 1 shows that the effective voltage Ueff rises parabolically from a base value of 6 volts to a maximum value of about 11 volts.
  • the specified effective voltage Ueff is applied to the glow plug by a method of pulse width modulation from the glow plug controller.
  • the vehicle electrical system voltage which is usually about 11 volts to 12 volts, applied in voltage pulses for short time intervals to the glow plug.
  • the duration of these voltage pulses and the duration of the intervening time intervals, in which the glow plugs are disconnected from the vehicle electrical system voltage set the effective voltage.
  • the effective voltage can be calculated, for example, as the voltage applied in the time average, the time average over the sum of the time period .DELTA.t 1 of a voltage pulse and an adjoining period .DELTA.t 2 , in which the glow plug is disconnected from the vehicle electrical system voltage calculated.
  • FIG. 2 are in addition to the in FIG. 1 shown course of the effective voltage shown in the pulse width modulation voltage pulses. How to get in FIG. 2 sees, the duration of the voltage pulses increases disproportionately with increasing time to and the duration of the pauses lying between the voltage pulses accordingly.
  • the duration of a voltage pulse and a subsequent period in which the glow plug is decoupled from the vehicle electrical system voltage in the example shown together amount to 0.1 second.
  • the time of beginning of a voltage pulse is in FIG. 2 highlighted by a dashed line at the top of the picture.
  • horizontal bars indicate the value of the time average of 0.5 s; 1.5 s; 2.5 s; 3.5 s; 4.5 s and 5.5 s applied voltage, ie the value of the effective voltage at this time, shown.
  • the voltage curve described above a quick and gentle heating of a ceramic glow plug for starting a motor can be achieved.
  • the maximum voltage ie the vehicle electrical system voltage of about 11 V
  • the operating temperature is reached.
  • the voltage can be lowered to a lower level sufficient to maintain the operating temperature. This lowering can be done in stages or continuously.
  • FIG. 3 the further voltage profile taking place following a method according to the invention is shown by way of example.
  • the left half of FIG. 3 also shows in FIG. 1 shown course of the rms voltage.
  • the right half of FIG. 3 shows how the voltage is gradually reduced after reaching a maximum value to a value sufficient to maintain the operating temperature.
  • the time scale in the right half of FIG. 3 is larger than selected in the left half.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Resistance Heating (AREA)
  • Control Of Resistance Heating (AREA)
  • Spark Plugs (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)

Claims (15)

  1. Procédé de chauffage d'une bougie à incandescence céramique par application d'une tension électrique variable à la bougie à incandescence, caractérisé en ce que la tension électrique progresse en moyenne temporelle de manière proportionnellement supérieure au temps de chauffage écoulé en partant d'une valeur de référence.
  2. Procédé selon la revendication 1, caractérisé en ce que la tension électrique est une tension efficace obtenue par un procédé de modulation de largeur d'impulsions.
  3. Procédé selon l'une des revendications précédentes, caractérisé en ce que la tension électrique reste constante au maximum pendant un intervalle de temps de 0,4 secondes au cours du cycle de chauffage.
  4. Procédé selon l'une des revendications précédentes, caractérisé en ce que la tension électrique progresse en continu en partant de la valeur de référence.
  5. Procédé selon l'une des revendications précédentes, caractérisé en ce que la tension électrique progresse en forme de parabole.
  6. Procédé selon l'une des revendications précédentes, caractérisé en ce que la courbe de tension électrique suit une progression ascendante fortement monotone.
  7. Procédé selon l'une des revendications précédentes, caractérisé en ce que la courbe de tension électrique est un tracé polygonal.
  8. Procédé selon la revendication 7, caractérisé en ce que le tracé polygonal présente au moins cinq points d'appui.
  9. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que la tension électrique progresse par degrés en partant de la valeur de référence, dans lequel la hauteur des degrés augmente avec le temps et/ou la largeur des degrés baisse avec le temps.
  10. Procédé selon l'une des revendications précédentes, caractérisé en ce que la tension électrique progresse jusqu'à une valeur maximale et après obtention de la valeur maximale, le cas échéant après temporisation, est ramenée à une valeur inférieure.
  11. Procédé selon l'une des revendications précédentes, caractérisé en ce que la tension électrique en moyenne temporelle progresse toutes les 0,3 secondes de manière proportionnellement supérieure jusqu'au terme du temps de chauffage.
  12. Procédé selon l'une des revendications précédentes, caractérisé en ce que la valeur de référence est au moins de 4 volts.
  13. Procédé selon la revendication 12, caractérisé en ce que la valeur de référence au début du procédé est portée de zéro à la valeur de référence en un seul bond.
  14. Bougie à incandescence caractérisée en ce qu'elle est réglée de manière à effectuer un procédé selon l'une des revendications précédentes en mode chauffage de bougie à incandescence.
  15. Bougie à incandescence selon la revendication 14, caractérisée en ce qu'au moins cinq points d'appui d'une courbe de consigne de la courbe de tension électrique sont stockées dans une mémoire de l'appareil de commande de bougie à incandescence pendant le cycle de chauffage, de préférence au moins huit points d'appui, en particulier au moins 12 points d'appui.
EP08011197A 2007-07-06 2008-06-19 Procédé destiné à chauffer une bougie de préchauffage en céramique et appareil de commande de bougies de préchauffage Active EP2012003B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007031943 2007-07-06
DE102007038131A DE102007038131B3 (de) 2007-07-06 2007-08-13 Verfahren zum Aufheizen einer keramischen Glühkerze und Glühkerzensteuergerät

Publications (3)

Publication Number Publication Date
EP2012003A2 EP2012003A2 (fr) 2009-01-07
EP2012003A3 EP2012003A3 (fr) 2010-12-08
EP2012003B1 true EP2012003B1 (fr) 2011-08-17

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EP08011197A Active EP2012003B1 (fr) 2007-07-06 2008-06-19 Procédé destiné à chauffer une bougie de préchauffage en céramique et appareil de commande de bougies de préchauffage

Country Status (6)

Country Link
US (1) US8153936B2 (fr)
EP (1) EP2012003B1 (fr)
JP (1) JP5154319B2 (fr)
KR (1) KR101524017B1 (fr)
AT (1) ATE520876T1 (fr)
DE (1) DE102007038131B3 (fr)

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EP2800451A4 (fr) * 2011-12-27 2016-05-18 Bosch Corp Dispositif de commande de puissance de bougie de départ
US9534575B2 (en) * 2013-07-31 2017-01-03 Borgwarner Ludwigsburg Gmbh Method for igniting a fuel/air mixture, ignition system and glow plug
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Also Published As

Publication number Publication date
EP2012003A3 (fr) 2010-12-08
ATE520876T1 (de) 2011-09-15
KR101524017B1 (ko) 2015-05-29
US8153936B2 (en) 2012-04-10
US20090008378A1 (en) 2009-01-08
KR20090004529A (ko) 2009-01-12
DE102007038131B3 (de) 2008-12-24
JP2009013983A (ja) 2009-01-22
EP2012003A2 (fr) 2009-01-07
JP5154319B2 (ja) 2013-02-27

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