EP1329630A2 - Glow and ion current measuring device for a Diesel engine - Google Patents

Glow and ion current measuring device for a Diesel engine Download PDF

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Publication number
EP1329630A2
EP1329630A2 EP02027416A EP02027416A EP1329630A2 EP 1329630 A2 EP1329630 A2 EP 1329630A2 EP 02027416 A EP02027416 A EP 02027416A EP 02027416 A EP02027416 A EP 02027416A EP 1329630 A2 EP1329630 A2 EP 1329630A2
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EP
European Patent Office
Prior art keywords
annealing
voltage
glow
measuring
diesel engine
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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.)
Granted
Application number
EP02027416A
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German (de)
French (fr)
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EP1329630B1 (en
EP1329630A3 (en
Inventor
Heinz-Georg C/o Beru AG Schmitz
Rüdiger Herweg
Michael Kessler
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BorgWarner Ludwigsburg GmbH
Mercedes Benz Group AG
Original Assignee
DaimlerChrysler AG
Daimler AG
Beru AG
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Publication of EP1329630A2 publication Critical patent/EP1329630A2/en
Publication of EP1329630A3 publication Critical patent/EP1329630A3/en
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    • 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
    • F02P17/00—Testing of ignition installations, e.g. in combination with adjusting; Testing of ignition timing in compression-ignition engines
    • F02P17/12—Testing characteristics of the spark, ignition voltage or current
    • 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
    • F02P19/028—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 the glow plug being combined with or used as a sensor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
    • F23Q7/001—Glowing plugs for internal-combustion engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
    • F23Q7/001—Glowing plugs for internal-combustion engines
    • F23Q2007/002—Glowing plugs for internal-combustion engines with sensing means

Definitions

  • the invention relates to an annealing and Ionenstrommeßvoriques for a diesel engine with one for each or individual cylinders of the diesel engine respectively provided Annealing and Ionenstrommeßkerze, in the annealing operation a Annealing voltage and in measuring mode is a measuring voltage, the lower than the annealing voltage.
  • the glow operation of a glow plug is used in a diesel engine in addition, the ignition, for example, during cold start or assist by intermediate annealing. By measuring the ionic current is beyond a determination of the combustion conditions possible in the cylinders of the diesel engine.
  • the glow plugs in particular so energized that they are at a temperature of more than 800 ° C support the ignition. In parallel then will the ion current measured in the cold start z.
  • the object underlying the invention is Therefore, therein, an annealing and Ionenstrommeßvorraum the to create the aforementioned type, in which the Glühund the measuring functions do not interfere with each other.
  • the annealing of an incandescent and Ionenstrommeßkerze is interrupted for a certain time, in order to be able to measure the ion current during this time, the at the Glüh- and Ionenstrommeßkerze lying RMS voltage from.
  • the effective Voltage by 8.7% and thus the glow power around 16.7%.
  • the glow plug is thus in the regulated state to a lower temperature so that they do their job as Ignition support can only meet insufficient. at a two-stroke engine affects the double because of the frequent working cycles even clearer.
  • the synchronization of the switching operations with the motor and Drive clocks may be through communication with the Engine control unit or by a suitable separate control be ensured. It does not have every stroke be madeftstert, the measurement can easily also only for the second, third and fourth working cycle respectively. The glow and Ionenstrommeßkerze is then adapted accordingly.
  • crankshaft angle of 700 ° corresponds to the crankshaft angle of -20 °, so that the illustrated in Figure 1 Repeat the operations periodically.
  • an annealing control device which the available vehicle electrical system voltage periodically on and turns off, d. H. the annealing and Ionenstrommeßschreiben in Form of voltage pulses timed across extend a portion of the crankshaft angle.
  • the incandescent and Ionenstrommeßkerze is designed so that their nominal tension, at which they have the required Temperatures reached only a fraction of the available standing mains voltage. In wiring systems with 14 Volts, this nominal voltage is about 4 to 9 volts.
  • the timing by the Glüh horrinvoriques is with synchronized to the firing times of each cylinder, that the break in the energization for the Glüh plante for example with the expected time of ignition or combustion begins at which the ionic current can occur.
  • the measuring voltage is applied to the glow and Ionenstrommeßkerze, which is much lower than the annealing voltage is, so that during this time the Glüh- and Ionenstrommeßkerze as an electrode or sensor for measuring the ion current is working.
  • the timing is preferably such that the energization the individual incandescent and Ionenstrommeßkerzen for the Cylinder is made so that it is analogous to the ignition of the cylinder is turned on one after the other, reducing the current load of the electrical system is made uniform.
  • the timing is, however such that the Glühenciesimpulse and the Measuring voltage pulses of the incandescent and Ionenstrommeßkerzen of two different cylinders, for example the glow voltage pulse 10 for the glow and Ionenstrommeßkerze the fourth cylinder with the measuring voltage pulse 9 for the Glühund Ion current plug of the first cylinder overlap.
  • the annealing voltage and measuring voltage pulses applied to the Glühund Ionenstrommeßkerzen the individual cylinders are each in addition extend over about 280 ° of the crankshaft angle.
  • glow and Ionenstrommeßvoriquesen can ion current signals at the same time full Functioning of the annealing operation, for example as Cold start aid to be measured. This is a mode of operation possible, at the expected ignition timing the highest possible Temperature at the glow and Ionenstrommeßkerze to Available.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Testing Of Engines (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

The device has a glow and ion current measurement plug for each or the cylinder that carries a glow voltage in glow mode and a measurement voltage in measurement mode and a controller that clocks the glow and measurement voltages and applies them to the glow and ion current measurement plug synchronously with the combustion processes in the cylinder's combustion chamber.

Description

Die Erfindung betrifft eine Glüh- und Ionenstrommeßvorrichtung für einen Dieselmotor mit einer für jeden oder einzelne Zylinder des Dieselmotors jeweils vorgesehenen Glüh- und Ionenstrommeßkerze, an der im Glühbetrieb eine Glühspannung und im Meßbetrieb eine Meßspannung liegt, die niedriger als die Glühspannung ist.The invention relates to an annealing and Ionenstrommeßvorrichtung for a diesel engine with one for each or individual cylinders of the diesel engine respectively provided Annealing and Ionenstrommeßkerze, in the annealing operation a Annealing voltage and in measuring mode is a measuring voltage, the lower than the annealing voltage.

Der Glühbetrieb einer Glühkerze dient bei einem Dieselmotor dazu, die Zündung beispielsweise beim Kaltstart oder durch Zwischenglühen zu unterstützen. Durch das Messen des Ionenstromes ist darüber hinaus eine Ermittlung der Verbrennungsverhältnisse in den Zylindern des Dieselmotors möglich.The glow operation of a glow plug is used in a diesel engine in addition, the ignition, for example, during cold start or assist by intermediate annealing. By measuring the ionic current is beyond a determination of the combustion conditions possible in the cylinders of the diesel engine.

Bei einem Kaltstart eines Dieselmotors werden zur Verbesserung des Startverhaltens des Motors die Glühkerzen insbesondere so bestromt, daß sie mit einer Temperatur von mehr als 800°C die Zündung unterstützen. Parallel dazu wird dann der Ionenstrom gemessen, der im Kaltstart z. B. Informationen über Zündaussetzer oder Zündverzögerungen liefert.When a cold start of a diesel engine will be to the improvement the starting behavior of the engine, the glow plugs in particular so energized that they are at a temperature of more than 800 ° C support the ignition. In parallel then will the ion current measured in the cold start z. B. Information about misfires or ignition delays.

Glüh- und Ionenstrommeßkerzen, die diese Funktionen erfüllen, sind aus der EP 0 894 976 A2, der EP 0 834 652 A1, der DE 197 38 915 A1 sowie der DE 197 37 396 A1 bekannt.Annealing and Ionenstrommeßkerzen that these functions are from EP 0 894 976 A2, EP 0 834 652 A1, DE 197 38 915 A1 and DE 197 37 396 A1.

Bei den bekannten Glüh- und Ionenstrommeßkerzen wird für die Ionenstrommessung die an der Glühkerze liegende Glühspannung abgenommen und die Meßspannung angelegt, die nicht zu einem Stromfluß durch das Heizelement führt, so daß die Glühfunktion unterbrochen wird, was zur Folge hat, daß sich die Glühkerze für die Zeit der Ionenstrommessung abkühlt. Das heißt, daß bei den bekannten Glüh- und Ionenstrommeßkerzen die jeweils eine Funktion, nämlich die Glühoder die Meßfunktion, durch die jeweils andere Funktion beeinträchtigt ist.In the known incandescent and Ionenstrommeßkerzen is for the ion current measurement lying on the glow plug Glow voltage removed and applied the measuring voltage, the does not lead to a current flow through the heating element, so that the glow function is interrupted, with the result that the glow plug cools down for the time of ion current measurement. That is, in the known incandescent and Ionenstrommeßkerzen each one function, namely the Glühoder the measuring function, which affects each other's function is.

Die der Erfindung zugrunde liegende Aufgabe besteht daher darin, eine Glüh- und Ionenstrommeßvorrichtung der eingangs genannten Art zu schaffen, bei der sich die Glühund die Meßfunktionen gegenseitig nicht beeinträchtigen.The object underlying the invention is Therefore, therein, an annealing and Ionenstrommeßvorrichtung the to create the aforementioned type, in which the Glühund the measuring functions do not interfere with each other.

Diese Aufgabe wird gemäß der Erfindung durch die Ausbildung gelöst, die im Patentanspruch 1 angegeben ist.This object is achieved according to the invention by the training solved, which is specified in claim 1.

Im folgenden werden anhand der zugehörigen Zeichnung besonders bevorzugte Ausführungsbeispiele der Erfindung näher beschrieben. Es zeigen

  • Figur 1 die Abfolge der Glüh- und lonenstrommeßvorgänge bei einem ersten Ausführungsbeispiel und
  • Figur 2 die Abfolge der Glüh- und Ionenstrommeßvorgänge bei einem zweiten Ausführungsbeispiel.
    • In the following, particularly preferred embodiments of the invention will be described with reference to the accompanying drawings. Show it
  • Figure 1 shows the sequence of Glüh- and lonenstrommeßvorgänge in a first embodiment and
  • Figure 2 shows the sequence of the Glüh- and Ionenstrommeßvorgänge in a second embodiment.

    • Wenn in üblicher Weise das Glühen einer Glüh- und Ionenstrommeßkerze für eine bestimmte Zeit unterbrochen wird, um in dieser Zeit den Ionenstrom messen zu können, nimmt die an der Glüh- und Ionenstrommeßkerze liegende Effektivspannung ab. Wenn beispielsweise bei einem Motor, der nach dem Viertaktverfahren arbeitet, über ein Fenster von 120° des Kurbelwellenwinkels in jedem Arbeitstakt der Ionenstrom gemessen wird, reduziert sich bei einem Viertaktmotor die effektive Spannung um 8,7 % und damit die Glühleistung um 16,7 %. Die Glühkerze kommt dadurch im ausgeregelten Zustand auf eine geringere Temperatur so daß sie ihre Aufgabe als Zündungsunterstützung nur unzureichend erfüllen kann. Bei einem Zweitaktmotor wirkt sich das aufgrund der doppelt so häufigen Arbeitstakte noch deutlicher aus.When in the usual way, the annealing of an incandescent and Ionenstrommeßkerze is interrupted for a certain time, in order to be able to measure the ion current during this time, the at the Glüh- and Ionenstrommeßkerze lying RMS voltage from. For example, if a motor after the Four-stroke procedure works, over a window of 120 ° of Crankshaft angle measured in each stroke of the ion current is reduced in a four-stroke engine, the effective Voltage by 8.7% and thus the glow power around 16.7%. The glow plug is thus in the regulated state to a lower temperature so that they do their job as Ignition support can only meet insufficient. at a two-stroke engine affects the double because of the frequent working cycles even clearer.

    Eine erfindungsgemäße Ausbildung, diesem Problem zu begegnen besteht darin, die Auslegung der Glüh- und Ionenstrommeßkerze so zu verändern, daß mit der geringeren zur Verfügung stehenden Effektivspannung die notwendigen Temperaturen erreicht werden. Dabei werden gemäß Figur 1 die Glüh- und Ionenstrommeßkerzen mit einem geeigneten Steuergerät so angesteuert, daß bei einer mit dem Verbrennungsvorgang synchronisierten getakteten Glühung für die Zeitdauer des erwarteten Ionenstromsignals beispielsweise ab Beginn der ersten Einspritzung über 120° des Kurbelwellenwinkels, was bei einer Motordrehzahl von 1000 Umdrehungen pro Minute einer Zeit von 20 ms entspricht, das Glühen unterbrochen wird und die Meßspannung für die Ionenstrommessung angelegt wird. Die Synchronisierung der Schaltvorgänge mit den Motorund Antriebstakten kann durch eine Kommunikation mit dem Motorsteuergerät oder durch eine geeignete separate Steuerung sichergestellt werden. Dabei muß nicht jeder Arbeitstakt ausgefenstert werden, die Messung kann ohne weiteres auch nur für den zweiten, dritten und vierten Arbeitstakt erfolgen. Die Glüh- und Ionenstrommeßkerze wird dann dementsprechend angepaßt.An inventive training, this problem too encounter is the interpretation of the glow and Ionenstrommeßkerze to change so that with the lower to Available RMS voltage the necessary temperatures be achieved. In this case, according to FIG. 1, the Annealing and Ionenstrommeßkerzen with a suitable control unit controlled so that at one with the combustion process synchronized clocked annealing for the duration the expected ion current signal, for example from the beginning the first injection over 120 ° of the crankshaft angle, what at an engine speed of 1000 revolutions per minute corresponds to a time of 20 ms, the annealing interrupted is applied and the measuring voltage for the ion current measurement becomes. The synchronization of the switching operations with the motor and Drive clocks may be through communication with the Engine control unit or by a suitable separate control be ensured. It does not have every stroke be ausgeftstert, the measurement can easily also only for the second, third and fourth working cycle respectively. The glow and Ionenstrommeßkerze is then adapted accordingly.

    Ist es für die Ansteuerung einfacher oder günstiger, jeden oberen Totpunkt und nicht nur diejenigen mit erwarteter Zündung (jeder zweite bei Viertaktmotoren) auszufenstern, ist das analog mit einer noch niedrigeren Nominalspannung der Glühkerzen durchführbar.Is it easier or cheaper for the control, every top dead center and not just those with expected Ignition (every second in four-stroke engines) auszufenstern, this is analogous with an even lower nominal voltage the glow plugs feasible.

    Das heißt im einzelnen, daß gemäß Figur 1 bei einer Kurbelwellenwinkelstellung von -20° mit der Ionenstrommeßung im Zylinder 1 begonnen wird und sich daran bei einem Kurbelwellenwinkel von 100° das Glühen im Zylinder 1 anschließt. Mit 3 und 4 sowie 4 und 5 und 6 und 7 sind die Meß- und Glühvorgänge für die Zylinder 2, 3 und 4 jeweils bezeichnet.This means in detail that according to Figure 1 at a Crankshaft angle position of -20 ° with ion current measurement is started in the cylinder 1 and at a crankshaft angle of 100 ° joins the annealing in the cylinder 1. With 3 and 4 and 4 and 5 and 6 and 7 are the measuring and Annealing operations for the cylinders 2, 3 and 4 respectively.

    Der Kurbelwellenwinkel von 700° entspricht dem Kurbelwellenwinkel von -20°, so daß sich die in Figur 1 dargestellten Vorgänge periodisch wiederholen.The crankshaft angle of 700 ° corresponds to the crankshaft angle of -20 °, so that the illustrated in Figure 1 Repeat the operations periodically.

    Durch die Synchronisierung der getakteten Glühung mit dem Verbrennungsvorgang im Brennraum und insbesondere dadurch, daß der Beginn der Ionenstrommeßphase mit dem zu erwartenden Zeitpunkt der Zündung bzw. des Verbrennungsvorgangs zusammenfällt, kommt es zu keiner Funktionseinbuße der Glüh- und Ionenstrommeßkerze. In dieser Weise ist es möglich, die Ionenstrommeßspannung an der Glühkerze zum Zeitpunkt eines zu erwartenden Ionenstromsignals während des Verbrennungsvorgangs anzulegen und die verbleibende Zeit für die Bestromung der Glüh- und Ionenstrommeßkerze zu nutzen, so daß durch die Ionenstrommessung kein Nachteil hinsichtlich der Temperatur der Glüh- und Ionenstrommeßkerze auftritt.By synchronizing the clocked annealing with the combustion process in the combustion chamber and in particular by that the beginning of the Ionenstrommeßphase with the expected Time of ignition or combustion process coincides, there is no loss of function of the Incandescent and ionic power plug. In this way it is possible the Ionenstrommeßspannung on the glow plug at the time an expected ion current signal during the Create combustion process and the remaining time for to use the energization of the incandescent and ionic power plug, so that by the ion current measurement no disadvantage regarding the temperature of the glow and Ionenstrommeßkerze occurs.

    Bei dem zweiten in Figur 2 dargestellten Ausführungsbeispiel der erfindungsgemäßen Glüh- und Ionenstrommeßvorrichtung ist eine Glühsteuervorrichtung vorgesehen, die die zur Verfügung stehende Bordnetzspannung periodisch ein- und ausschaltet, d. h. die Glüh- und Ionenstrommeßspannungen in Form von Spannungsimpulsen zeitlich taktet, die sich über einen Teil des Kurbelwellenwinkels erstrecken. Damit auch bei einer derartigen Taktung der Glühspannung die für den Betrieb des Dieselmotors notwendigen Temperaturen erreicht werden, ist die Glüh- und Ionenstrommeßkerze so ausgelegt, daß ihre nominelle Spannung, bei der sie die erforderlichen Temperaturen erreicht, nur einen Bruchteil der zur Verfügung stehenden Netzspannung beträgt. Bei Bordnetzsystemen mit 14 Volt liegt diese nominelle Spannung bei etwa 4 bis 9 Volt.In the second embodiment shown in Figure 2 the annealing and Ionenstrommeßvorrichtung invention an annealing control device is provided which the available vehicle electrical system voltage periodically on and turns off, d. H. the annealing and Ionenstrommeßspannungen in Form of voltage pulses timed across extend a portion of the crankshaft angle. With it too at such a timing of the annealing voltage for the Operation of the diesel engine reaches necessary temperatures be, the incandescent and Ionenstrommeßkerze is designed so that their nominal tension, at which they have the required Temperatures reached only a fraction of the available standing mains voltage. In wiring systems with 14 Volts, this nominal voltage is about 4 to 9 volts.

    Die Glüh- und Ionenstrommeßkerzen werden in dieser Weise mit einer Effektivspannung versorgt, die der für das Erreichen der notwendigen Temperatur erforderlichen Spannung entspricht.The glow and Ionenstrommeßkerzen be in this Provided with an effective voltage, the one for the Reaching the necessary temperature required voltage equivalent.

    Die Taktung durch die Glühsteuervorrichtung wird mit den Zündzeitpunkten der einzelnen Zylinder so synchronisiert, daß die Pause in der Bestromung für den Glühbetrieb etwa mit dem erwarteten Zeitpunkt der Zündung bzw. der Verbrennung beginnt, an dem der Ionenstrom auftreten kann. In dieser Zeit liegt die Meßspannung an der Glüh- und Ionenstrommeßkerze, die wesentlich niedriger als die Glühspannung ist, so daß während dieser Zeit die Glüh- und Ionenstrommeßkerze als Elektrode bzw. Sensor zum Messen des Ionenstromes arbeitet.The timing by the Glühsteuervorrichtung is with synchronized to the firing times of each cylinder, that the break in the energization for the Glühbetrieb for example with the expected time of ignition or combustion begins at which the ionic current can occur. In this time, the measuring voltage is applied to the glow and Ionenstrommeßkerze, which is much lower than the annealing voltage is, so that during this time the Glüh- and Ionenstrommeßkerze as an electrode or sensor for measuring the ion current is working.

    Die Taktung erfolgt vorzugsweise derart, daß die Bestromung der einzelnen Glüh- und Ionenstrommeßkerzen für die Zylinder so erfolgt, daß sie analog der Zündung der Zylinder nacheinander eingeschaltet wird, wodurch die Strombelastung des Bordnetzes vergleichmäßigt wird.The timing is preferably such that the energization the individual incandescent and Ionenstrommeßkerzen for the Cylinder is made so that it is analogous to the ignition of the cylinder is turned on one after the other, reducing the current load of the electrical system is made uniform.

    Wie es in Figur 2 dargestellt ist, kann das beispielsweise dadurch erfolgen, daß die Glüh- und Ionenstrommeßkerzen bis zu einem Zeitpunkt unmittelbar vor der Ionenstrommessung mit der Glühspannung versorgt werden und sich daran direkt das Anlegen der Meßspannung anschließt. Das hat den Vorteil, daß die Glüh- und Ionenstrommeßkerze genau zur Zündung die höchstmögliche Temperatur erreicht, wenn der Zündzeitpunkt der Beginn der Ionenstrommeßzeit ist. Ein dabei eventuell vorhandener Zeitverzug, der zwischen dem Ende der Bestromung der Glüh- und Ionenstrommeßkerze für den Glühbetrieb und dem tatsächlichen Erreichen der maximalen Temperatur besteht, kann berechnet und über eine entsprechend vorgezogene Bestromung der Glüh- und Ionenstrommeßkerze kompensiert werden. Das kann auch auf zwei oder mehrere Perioden innerhalb der vier bzw. zwei Takte des Motors aufgeteilt werden, was zu gleichmäßigeren Temperaturen, besonders bei niedrigeren Drehzahlen mit entsprechend langen Zeitspannen zwischen den einzelnen Zündungen führt. As shown in Figure 2, for example take place in that the incandescent and Ionenstrommeßkerzen until a time immediately before the ion current measurement be supplied with the glow voltage and it directly the application of the measuring voltage connects. That has that Advantage that the incandescent and Ionenstrommeßkerze exactly to the ignition the highest possible temperature reached when the ignition is the beginning of the Ionenstrommeßzeit. One with it any time delay that exists between the end of the Energizing the glow and Ionenstrommeßkerze for Glühbetrieb and the actual achievement of the maximum temperature exists, can be calculated and forwarded accordingly Energization of the glow and Ionenstrommeßkerze compensated become. This can also last for two or more periods split within the four or two strokes of the engine resulting in more even temperatures, especially at lower speeds with correspondingly long periods between the individual ignitions leads.

    Wie es in Figur 2 weiterhin dargestellt ist, wird bei der Spannungstaktung ein Überlappen der jeweiligen Glühoder Meßspannungen, die an den einzelnen Glüh- und Ionenstrommeßkerzen der Zylinder liegen, vermieden. Das ergibt sich aus den dargestellten Glühspannungsimpulsen 10, 12, 14, 16,' die an den einzelnen Glüh- und Ionenstrommeßkerzen der Zylinder liegen, sowie aus den Meßspannungsimpulsen 9, 11, 13, 15, die entsprechend an den Glüh- und Ionenstrommeßkerzen der einzelnen Zylinder liegen. Die Taktung erfolgt allerdings derart, daß sich die Glühspannungsimpulse und die Meßspannungsimpulse der Glüh- und Ionenstrommeßkerzen von zwei verschiedenen Zylindern, beispielsweise der Glühspannungsimpuls 10 für die Glüh- und Ionenstrommeßkerze des vierten Zylinders mit dem Meßspannungsimpuls 9 für die Glühund Ionenstrommeßkerze des ersten Zylinders überlappen.As further shown in Figure 2, is at the voltage timing overlap the respective Glühoder Measuring voltages at the individual incandescent and Ionenstrommeßkerzen the cylinder lie, avoided. That makes from the illustrated Glühspannungsimpulsen 10, 12, 14, 16, 'at the individual incandescent and Ionenstrommeßkerzen the Cylinder lie, as well as from the Meßspannungsimpulsen 9, 11, 13, 15, which correspond to the glow and Ionenstrommeßkerzen the individual cylinder lie. The timing is, however such that the Glühspannungsimpulse and the Measuring voltage pulses of the incandescent and Ionenstrommeßkerzen of two different cylinders, for example the glow voltage pulse 10 for the glow and Ionenstrommeßkerze the fourth cylinder with the measuring voltage pulse 9 for the Glühund Ion current plug of the first cylinder overlap.

    Aus der Zeichnung ist weiterhin erkennbar, daß sich die Glühspannungs- und Meßspannungsimpulse, die an den Glühund Ionenstrommeßkerzen der einzelnen Zylinder jeweils liegen in Addition über etwa 280° des Kurbelwellenwinkels erstrecken.From the drawing is further seen that the annealing voltage and measuring voltage pulses applied to the Glühund Ionenstrommeßkerzen the individual cylinders are each in addition extend over about 280 ° of the crankshaft angle.

    Aufgrund der niedrigen Nominalspannung der Glüh- und Ionenstrommeßkerzen muß nicht über die gesamte Zeit außerhab des Ionenstrommeßfensters geglüht werden, so daß dadurch automatisch eine zeitliche Verteilung der Spannungsbeaufschlagungsperioden der Glüh- und Ionenstrommeßkerzen erreicht wird, die die Bordnetzbelastung und dementsprechend Bordnetzschwankungen möglichst gering hält.Due to the low nominal voltage of the annealing and Ionenstrommeßkerzen must not over the entire time excepthab of the Ionenstrommeßfensters be annealed so that thereby automatically a temporal distribution of Spannungsbeaufschlagungsperioden reached the incandescent and Ionenstrommeßkerzen which is the on-board network load and accordingly Keeps wiring fluctuations as low as possible.

    Die Vorteile derartiger Glüh- und Ionenstrommeßvorrichtungen liegen unter anderem in der geringeren Leistungsaufnahme der einzelnen Glüh- und Ionenstrommeßkerzen sowie der Möglichkeit einer besseren Nachführung der Glühspannung an den momentanen Motorbetriebszustand, beispielsweise die Drehzahl, die Einspritzmenge, die Temperatur, die zeitliche Lage des Verbrennungsvorganges usw. Dadurch kann die Temperatur der Glüh- und Ionenstrommeßkerzen besser an die Erfordernisse des Motors angepaßt werden, als es bisher möglich war.The advantages of such glow and Ionenstrommeßvorrichtungen are among other things in the lower power consumption the individual incandescent and Ionenstrommeßkerzen as well the possibility of better tracking of the annealing voltage to the current engine operating state, for example the Speed, the injection quantity, the temperature, the temporal Location of the combustion process, etc. This allows the temperature the incandescent and Ionenstrommeßkerzen better to the requirements be adapted to the engine, as previously possible was.

    Mit den oben beschriebenen Glüh- und Ionenstrommeßvorrichtungen können Ionenstromsignale bei gleichzeitig voller Funktionsfähigkeit des Glühbetriebes, beispielsweise als Kaltstarthilfe, gemessen werden. Dabei ist eine Betriebsweise möglich, bei der zum erwarteten Zündzeitpunkt die höchstmögliche Temperatur an der Glüh- und Ionenstrommeßkerze zur Verfügung steht.With the above-described glow and Ionenstrommeßvorrichtungen can ion current signals at the same time full Functioning of the annealing operation, for example as Cold start aid to be measured. This is a mode of operation possible, at the expected ignition timing the highest possible Temperature at the glow and Ionenstrommeßkerze to Available.

    Claims (8)

    Glüh- und Ionenstrommessvorrichtung für einen Dieselmotor mit einer für jeden oder einzelne Zylinder des Dieselmotors jeweils vorgesehenen Glüh- und Ionenstrommesskerze, an der über den vollen Kurbelwellenwinkel verteilt im Glühbetrieb eine Glühspannung und im Messbetrieb eine Messspannung liegen, dadurch gekennzeichnet, dass die Glüh- und Ionenstrommesskerzen so ausgelegt sind, dass ihre Nominalspannung, bei der sie die Solltemperatur erreichen der Effektivspannung der über den vollen Kurbelwellenwinkelbereich anliegenden Glühspannung entspricht.Annealing and ion current measuring device for a diesel engine with a provided for each or individual cylinders of the diesel engine respectively Glüh- and Ionenstrommesskerze, distributed over the full crankshaft angle in glow operation an annealing and measuring operation in a measuring voltage, characterized in that the incandescent and Ionenstrommesskerzen are designed so that their nominal voltage at which they reach the setpoint temperature corresponds to the effective voltage of the over the full crankshaft angle range applied glow voltage. Vorrichtung nach Anspruch 1, gekennzeichnet durch eine Steuereinrichtung, die die Glüh- und die Messspannungen an die Glüh- und die Messkerze eines Zylinders jeweils über sich aneinander anschließende Kurbelwellenwinkelbereiche anlegt.Apparatus according to claim 1, characterized by a control device which applies the annealing and the measuring voltages to the annealing and the measuring plug of a cylinder respectively adjacent to each other crankshaft angle ranges. Vorrichtung nach Anspruch 1, gekennzeichnet durch eine Steuereinrichtung, die die Glüh- und die Messspannung in Form von einzelnen sich über einen Teil des Kurbelwellenwinkelbereiches erstreckenden Spannungsimpulse getaktet an die Glüh- und Ionenstrommesskerzen legt.Apparatus according to claim 1, characterized by a control device which sets the annealing and the measuring voltage in the form of individual over a portion of the crankshaft angle range extending voltage pulses clocked to the annealing and Ionenstrommesskerzen. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass die Steuervorrichtung so ausgebildet ist, dass sich die Glühspannungsimpulse und die Messspannungsimpulse, die an den Glüh- und Ionenstrommesskerzen der Zylinder liegen, jeweils nicht überlappen.Apparatus according to claim 3, characterized in that the control device is designed so that the Glühspannungsimpulse and the measuring voltage pulses, which are located on the annealing and Ionenstrommesskerzen the cylinder, each does not overlap. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass die Steuervorrichtung so ausgebildet ist, dass sich die Glühspannungsimpulse und die Messspannungsimpulse, die an den Glüh- und Ionenstrommesskerzen von zwei verschiedenen Zylindern liegen, einander überlappen. Apparatus according to claim 3, characterized in that the control device is designed such that the Glühspannungsimpulse and the measuring voltage pulses, which are located on the Glüh- and Ionenstrommesskerzen of two different cylinders overlap each other. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Glüh- und die Messspannung zu den Verbrennungsvorgängen im Brennraum der Zylinder des Dieselmotors synchronisiert an die Glüh- und Ionenstrommesskerzen gelegt werden.Device according to one of the preceding claims, characterized in that the annealing and the measurement voltage to the combustion processes in the combustion chamber of the cylinder of the diesel engine synchronized to the glow and Ionenstrommesskerzen be placed. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass der Beginn des Ionenstrommesstaktes zu dem Beginn der Zündung bzw. der Verbrennung in den Zylinder des Dieselmotors synchronisiert ist.Apparatus according to claim 6, characterized in that the beginning of the Ionenstrommesstaktes is synchronized to the beginning of the ignition or the combustion in the cylinder of the diesel engine. Vorrichtung nach Anspruch 6 oder 7, dadurch gekennzeichnet, dass die Glühspannung bis kurz vor dem erwarteten Zündzeitpunkt anliegt.Apparatus according to claim 6 or 7, characterized in that the annealing voltage is applied shortly before the expected ignition timing.
    EP02027416A 2001-12-18 2002-12-09 Glow and ion current measuring device for a Diesel engine Expired - Lifetime EP1329630B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE10162253 2001-12-18
    DE10162253A DE10162253A1 (en) 2001-12-18 2001-12-18 Glow and ion current measurement device for diesel engine has controller that clocks glow and measurement voltages and applies to plug synchronously with combustion processes

    Publications (3)

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    EP1329630A2 true EP1329630A2 (en) 2003-07-23
    EP1329630A3 EP1329630A3 (en) 2006-03-01
    EP1329630B1 EP1329630B1 (en) 2008-04-02

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    EP02027416A Expired - Lifetime EP1329630B1 (en) 2001-12-18 2002-12-09 Glow and ion current measuring device for a Diesel engine

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    AT (1) ATE391233T1 (en)
    DE (2) DE10162253A1 (en)

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    DE19737396A1 (en) 1996-09-12 1998-03-19 Denso Corp Glow-plug for diesel engine
    DE19738915A1 (en) 1996-09-12 1998-03-19 Denso Corp Glow/heater plug for IC diesel engine
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    Cited By (2)

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    Publication number Priority date Publication date Assignee Title
    DE102004029006B3 (en) * 2004-06-16 2005-04-07 Daimlerchrysler Ag Signal evaluation method for ion current measurement in diesel engine uses filtering via transmission function for effective ion current measurement upon soiling of glow and ion current measuring plug
    EP1607607A1 (en) 2004-06-16 2005-12-21 DaimlerChrysler AG Signal treatment method for an ionic current in Diesel engines

    Also Published As

    Publication number Publication date
    ATE391233T1 (en) 2008-04-15
    EP1329630B1 (en) 2008-04-02
    EP1329630A3 (en) 2006-03-01
    DE10162253A1 (en) 2003-07-10
    DE50212013D1 (en) 2008-05-15

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