[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

EP0967391A2 - Procedure and device for monitoring the combustion in the combustion chamber of an internal-combustion engine - Google Patents

Procedure and device for monitoring the combustion in the combustion chamber of an internal-combustion engine Download PDF

Info

Publication number
EP0967391A2
EP0967391A2 EP99111230A EP99111230A EP0967391A2 EP 0967391 A2 EP0967391 A2 EP 0967391A2 EP 99111230 A EP99111230 A EP 99111230A EP 99111230 A EP99111230 A EP 99111230A EP 0967391 A2 EP0967391 A2 EP 0967391A2
Authority
EP
European Patent Office
Prior art keywords
combustion chamber
glow plug
heating element
combustion
voltage
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.)
Granted
Application number
EP99111230A
Other languages
German (de)
French (fr)
Other versions
EP0967391B1 (en
EP0967391A3 (en
Inventor
Bruno Dr. Lindl
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
Beru AG
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 Beru AG filed Critical Beru AG
Publication of EP0967391A2 publication Critical patent/EP0967391A2/en
Publication of EP0967391A3 publication Critical patent/EP0967391A3/en
Application granted granted Critical
Publication of EP0967391B1 publication Critical patent/EP0967391B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F02P19/028—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
    • 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
    • F02P23/00—Other ignition
    • F02P23/04—Other physical ignition means, e.g. using laser rays
    • F02P23/045—Other physical ignition means, e.g. using laser rays using electromagnetic microwaves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
    • F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
    • F02D35/021—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions using an ionic current sensor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
    • F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
    • F02D35/023—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining the cylinder pressure
    • F02D35/024—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining the cylinder pressure using an estimation
    • 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
    • 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
    • F02P2017/125—Measuring ionisation of combustion gas, e.g. by using ignition circuits

Definitions

  • the invention relates to a method and a device to monitor the combustion processes in the combustion chamber an internal combustion engine, in particular a diesel engine, at least one glow plug in the cylinder head is arranged with heating element.
  • the invention is therefore intended to provide a method and a Device of the type mentioned are created with which the combustion processes in the combustion chamber one Internal combustion engine can be monitored in a simple manner without significant structural changes to the machine must be made.
  • the device measures the ion current, which is between the heating element surface of the heating element of the glow plug and the combustion chamber surface forms and a measure for the Combustion processes.
  • the im Cylinder head used anyway and provided glow plug the ion current signal occurring at the glow plug becomes Monitoring of combustion processes, especially to determine them of the combustion chamber pressure, evaluated.
  • the cylinder head 1 a glow plug with heating element 2 is arranged in a diesel engine.
  • the one arranged in the heating element 2 Filament supplied by a battery 6 with a direct current.
  • a High-frequency generator 4 is provided, which is a high-frequency AC voltage generated on the heating element 2 of the glow plug lies.
  • a switch 5 is preferably provided, the two Has switch positions in which he either the battery 6 with the heating element 2 of the glow plug for glow operation or the high-frequency generator 4 with the heating element 2 the glow plug for combustion monitoring operation, in particular for measuring the combustion chamber pressure.
  • a demodulator, comparator and evaluation circuit 3 is used to that coming from heating element 2 in monitoring mode Evaluate signal. For this purpose, this circuit is 3rd both with the heating element 2 and the high-frequency generator 4 connected. At its output 7 it delivers a signal that for the parameters of the combustion processes in the combustion chamber Machine representative, especially proportional to combustion chamber pressure, is.
  • the arrangement shown in Fig. 1 works in the following way:
  • the modulating supply frequency can be chosen in this way be that as a microstructure on the compression / decompression wave appears with the frequency value of the required resolution of the pressure wave.
  • the temporal Change in amplitude and phase of the ion current function is proportional to the pressure change in the combustion chamber over time. Because of the differentiation according to time, all are the signal current influencing parasitic impedances, such as contact resistances at electrical connection points or Shunts due to soot or coal formation between the heating element 2 and cylinder head 1 suppressed. The pressure change over time is therefore proportional to the temporal current signal.
  • a switch 5 is provided, via which between the Supply of heating element 2 with current from battery 6 or with a high-frequency AC voltage from the high-frequency generator 4 can be switched, it is also possible the high frequency AC voltage of the glow voltage of overlay the battery 6. To do this, however, appropriate Interference suppression measures are taken in order to to avoid disruptive influences in the rest of the electrical system.
  • FIG. 2 A particularly preferred form of training is shown in FIG. 2 shown in the drawing.
  • the heating element 2 is electrically insulated via insulation 9 installed the glow plug body 10 and lies the glow voltage from the battery 6 on the glow tube 8 of the heating element 2.
  • the im Glow tube 8 arranged heating coil is with its combustion chamber side End connected to the glow tube 8 and lies with their other end in mass.
  • the heating element 2 is particularly mounted and is galvanically isolated in the glow plug body 10 the glow plug body 10 with its external thread in the cylinder head 1 screwed. It is therefore at ground potential.
  • the glow tube 8 is defined with an alternating voltage Amplitude and frequency applied by the high-frequency generator 4, this in turn forms between the ground potential located cylinder head wall on the combustion chamber side and the one with high-frequency AC voltage Glow tube 8 from an ion current 11, whose current function as Parameters include the combustion chamber pressure.
  • the embodiment shown in Fig. 2 has the special advantage that in the circuit shown there the glow resistance of the filament of the heating element 2 as Termination resistance of the resonant circuit acts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Testing Of Engines (AREA)
  • Measuring Fluid Pressure (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

The method involves using a high frequency generator (4) to supply a heating rod (2) of at least one spark plug arranged in a cylinder head (1) of a combustion chamber with a high-frequency voltage. A thereby produced ion current between the heating rod and the surface of the cylinder head is measured and evaluated. The ion current is preferably evaluated with an evaluation circuit (3), especially to determine a pressure in the combustion chamber. An Independent claim is provided for an arrangement for monitoring the combustion process.

Description

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Überwachen der Verbrennungsvorgänge in der Brennkammer einer Brennkraftmaschine, insbesondere einer Dieselmaschine, in deren Zylinderkopf wenigstens eine Glühkerze mit Heizstab angeordnet ist.The invention relates to a method and a device to monitor the combustion processes in the combustion chamber an internal combustion engine, in particular a diesel engine, at least one glow plug in the cylinder head is arranged with heating element.

Die Überwachung der Verbrennungsvorgänge in einer Brennkraftmaschine, insbesondere des Brennraumdruckes, der Brennraumtemperatur und der Flammenfront, ist die Voraussetzung für eine optimale Regelung einer Brennkraftmaschine, insbesondere einer Dieselmaschine. Insbesondere ist über die Messung des Brennraumdruckes eine brennraumdruckgeführte Dieselmaschinenregelung möglich.Monitoring the combustion processes in one Internal combustion engine, in particular the combustion chamber pressure, the The combustion chamber temperature and the flame front is the prerequisite for optimal control of an internal combustion engine, especially a diesel engine. In particular, is about the Measurement of the combustion chamber pressure Diesel engine control possible.

Motorregelungen, Glühzeitsteuerungen und entsprechende Drucksensoren sind an sich bekannt. Die Anordnung von separaten Drucksensoren neben der Glühkerze im Zylinderkopf der Brennkraftmaschine ist jedoch aus Platzgründen kaum möglich oder sogar ausgeschlossen.Engine controls, glow time controls and corresponding Pressure sensors are known per se. The arrangement of separate Pressure sensors next to the glow plug in the cylinder head of the However, internal combustion engine is hardly possible for reasons of space or even excluded.

Durch die Erfindung sollen daher ein Verfahren und eine Vorrichtung der eingangs genannten Art geschaffen werden, mit denen die Verbrennungsvorgänge in der Brennkammer einer Brennkraftmaschine in einfacher Weise überwacht werden können, ohne daß erhebliche bauliche Veränderungen an der Maschine vorgenommen werden müssen.The invention is therefore intended to provide a method and a Device of the type mentioned are created with which the combustion processes in the combustion chamber one Internal combustion engine can be monitored in a simple manner without significant structural changes to the machine must be made.

Diese Aufgabe wird gemäß der Erfindung durch die Ausbildung gelöst, die in den Ansprüche 1 und 4 jeweils angegeben ist.This object is achieved according to the invention through training solved, specified in claims 1 and 4, respectively is.

Bei dem erfindungsgemäßen Verfahren und der erfindungsgemäßen Vorrichtung wird der Ionenstrom gemessen, der sich zwischen der Heizstaboberfläche des Heizstabes der Glühkerze und der Brennraumoberfläche ausbildet und ein Maß für die Verbrennungsvorgänge ist.In the inventive method and the inventive The device measures the ion current, which is between the heating element surface of the heating element of the glow plug and the combustion chamber surface forms and a measure for the Combustion processes.

Anstelle eines separaten Drucksensors wird dazu die im Zylinderkopf ohnehin vorgesehene Glühkerze eingesetzt und wird das an der Glühkerze auftretende Ionenstromsignal zur Überwachung der Verbrennungsvorgänge, insbesondere zur Ermittlung des Brennraumdruckes, ausgewertet.Instead of a separate pressure sensor, the im Cylinder head used anyway and provided glow plug the ion current signal occurring at the glow plug becomes Monitoring of combustion processes, especially to determine them of the combustion chamber pressure, evaluated.

Die dadurch erzielten Vorteile sind unter anderem darin zu sehen, daß an der Maschine selbst keine baulichen Veränderungen vorgenommen werden müssen, insbesondere keine separaten Drucksensoren eingebaut werden müssen.The advantages achieved by this include, among others to see that there are no structural changes to the machine itself must be made, especially none separate pressure sensors must be installed.

Besonders bevorzugte Weiterbildungen und Ausgestaltungen des erfindungsgemäßen Verfahrens und der erfindungsgemäßen Vorrichtung sind Gegenstand der Patentansprüche 2, 3, 5 und 6.Particularly preferred further developments and refinements of the inventive method and the inventive Device are the subject of claims 2, 3, 5 and 6.

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

  • Fig. 1 ein schematisches Schaltbild eines ersten Ausführungsbeispiels und
  • Fig. 2 ein schematisches Schaltbild eines zweiten Ausführungsbeispiels.
    • Particularly preferred exemplary embodiments of the invention are described in more detail below with reference to the accompanying drawing. Show it
  • Fig. 1 is a schematic circuit diagram of a first embodiment and
  • Fig. 2 is a schematic circuit diagram of a second embodiment.

    • Wie es in Fig. 1 dargestellt ist, ist im Zylinderkopf 1 einer Dieselmaschine eine Glühkerze mit Heizstab 2 angeordnet. Im normalen Betrieb wird die im Heizstab 2 angeordnete Glühwendel über eine Batterie 6 mit einem Gleichstrom versorgt.As shown in FIG. 1, the cylinder head 1 a glow plug with heating element 2 is arranged in a diesel engine. In normal operation, the one arranged in the heating element 2 Filament supplied by a battery 6 with a direct current.

    Wie es weiterhin in Fig. 1 dargestellt ist, ist ein Hochfrequenzgenerator 4 vorgesehen, der eine hochfrequente Wechselspannung erzeugt, die am Heizstab 2 der Glühkerze liegt. Vorzugsweise ist ein Schalter 5 vorgesehen, der zwei Schalterstellungen hat, in denen er entweder die Batterie 6 mit dem Heizstab 2 der Glühkerze für den Glühbetrieb verbindet oder den Hochfrequenzgenerator 4 mit dem Heizstab 2 der Glühkerze für den Verbrennungsüberwachungsbetrieb, insbesondere für die Messung des Brennraumdruckes, verbindet. Eine Demodulator-, Komparator- und Auswerteschaltung 3 dient dazu, das vom Heizstab 2 im Überwachungsbetrieb kommende Signal auszuwerten. Zu diesem Zweck ist diese Schaltung 3 sowohl mit dem Heizstab 2 als auch dem Hochfrequenzgenerator 4 verbunden. An ihrem Ausgang 7 liefert sie ein Signal, das für die Parameter der Verbrennungsvorgänge im Brennraum der Maschine repräsentativ, insbesondere brennraumdruckproportional, ist. Die in Fig. 1 dargestellte Anordnung arbeitet in der folgenden Weise:As further shown in Fig. 1, is a High-frequency generator 4 is provided, which is a high-frequency AC voltage generated on the heating element 2 of the glow plug lies. A switch 5 is preferably provided, the two Has switch positions in which he either the battery 6 with the heating element 2 of the glow plug for glow operation or the high-frequency generator 4 with the heating element 2 the glow plug for combustion monitoring operation, in particular for measuring the combustion chamber pressure. A demodulator, comparator and evaluation circuit 3 is used to that coming from heating element 2 in monitoring mode Evaluate signal. For this purpose, this circuit is 3rd both with the heating element 2 and the high-frequency generator 4 connected. At its output 7 it delivers a signal that for the parameters of the combustion processes in the combustion chamber Machine representative, especially proportional to combustion chamber pressure, is. The arrangement shown in Fig. 1 works in the following way:

    Im geschlossenen Zustand des Stromkreises von der Batterie 6 zum Heizstab 2 der Glühkerze arbeitet diese im üblichen Glühbetrieb mit Glühzeitsteuerung. Wird diese elektrische Verbindung am Schalter 5 geöffnet und der Heizstab 2 mit dem Hochfrequenzgenerator 4 verbunden, wird eine hochfrequente Wechselspannung an den Heizstab 2 gelegt, so daß sich zwischen dem potentialfreien Heizstab 2 und der Zylinderkopfwandung des Brennraums ein Ionenstrom 11 ausbildet, der insbesondere druckproportional ist. Die elektronische Demodulator-, Komparator- und Auswerteschaltung 3 vergleicht das vom Hochfrequenzgenerator 4 eingespeiste Hochfrequenzsignal mit dem daraufhin von dem Heizstab 2 kommenden ionenstrommodulierten Signal hinsichtlich Amplitude und Phase und erzeugt über eine differenzierte Auswertung ein brennraumdruckproportionales Ausgangssignal am Ausgang 7.In the closed state of the circuit from the battery 6 to the heating element 2 of the glow plug, this works in the usual way Glow mode with glow time control. Will this be electrical Connection at switch 5 opened and heating element 2 connected to the high frequency generator 4, a high frequency AC voltage applied to the heating element 2, so that between the potential-free heating element 2 and the cylinder head wall of the combustion chamber forms an ion current 11, which is particularly proportional to pressure. The electronic Demodulator, comparator and evaluation circuit 3 compares the high-frequency signal fed by the high-frequency generator 4 with the ion current modulation then coming from the heating element 2 Signal regarding amplitude and phase and generates a combustion chamber pressure proportional to a differentiated evaluation Output signal at output 7.

    Die modulierende Versorgungsfrequenz kann dabei so gewählt sein, daß sie als Mikrostruktur auf der Kompressions/Dekompressionswelle erscheint, wobei der Frequenzwert der geforderten Auflösung der Druckwelle entspricht. Die zeitliche Änderung von Amplitude und Phase der Ionenstromfunktion ist der zeitlichen Druckänderung im Brennraum proportional. Wegen der Differenzierung nach der Zeit sind alle den Signalstrom beeinflussenden parasitären Impedanzen, wie Übergangswiderstände an elektrischen Verbindungsstellen oder Nebenschlüsse durch Ruß- oder Kohlebildung, zwischen Heizstab 2 und Zylinderkopf 1 unterdrückt. Die zeitliche Druckänderung ist somit dem zeitlichen Stromsignal proportional.The modulating supply frequency can be chosen in this way be that as a microstructure on the compression / decompression wave appears with the frequency value of the required resolution of the pressure wave. The temporal Change in amplitude and phase of the ion current function is proportional to the pressure change in the combustion chamber over time. Because of the differentiation according to time, all are the signal current influencing parasitic impedances, such as contact resistances at electrical connection points or Shunts due to soot or coal formation between the heating element 2 and cylinder head 1 suppressed. The pressure change over time is therefore proportional to the temporal current signal.

    Obwohl bei dem in Fig. 1 dargestellten Ausführungsbeispiel ein Schalter 5 vorgesehen ist, über den zwischen der Versorgung des Heizstabes 2 mit Strom von der Batterie 6 oder mit einer hochfrequenten Wechselspannung vom Hochfrequenzgenerator 4 umgeschaltet werden kann, ist es auch möglich, die hochfrequente Wechselspannung der Glühspannung von der Batterie 6 zu überlagern. Dazu müssen allerdings entsprechende Entstörmaßnahmen am Bordnetz getroffen werden, um störende Einflüsse im übrigen Bordnetz zu vermeiden.Although in the embodiment shown in Fig. 1 a switch 5 is provided, via which between the Supply of heating element 2 with current from battery 6 or with a high-frequency AC voltage from the high-frequency generator 4 can be switched, it is also possible the high frequency AC voltage of the glow voltage of overlay the battery 6. To do this, however, appropriate Interference suppression measures are taken in order to to avoid disruptive influences in the rest of the electrical system.

    Eine besonders bevorzugte Ausbildungsform ist in Fig. 2 der Zeichnung dargestellt. Bei dieser Ausbildungsform ist der Heizstab 2 über eine Isolierung 9 elektrisch isoliert in den Glühkerzenkörper 10 eingebaut und liegt die Glühspannung von der Batterie 6 am Glührohr 8 des Heizstabes 2. Die im Glührohr 8 angeordnete Heizwendel ist mit ihrem brennraumseitigen Ende mit dem Glührohr 8 verbunden und liegt mit ihrem anderen Ende an Masse.A particularly preferred form of training is shown in FIG. 2 shown in the drawing. In this form of training is the heating element 2 is electrically insulated via insulation 9 installed the glow plug body 10 and lies the glow voltage from the battery 6 on the glow tube 8 of the heating element 2. The im Glow tube 8 arranged heating coil is with its combustion chamber side End connected to the glow tube 8 and lies with their other end in mass.

    Bei dieser Ausbildung ist der Heizstab 2 insbesondere galvanisch isoliert im Glühkerzenkörper 10 montiert und ist der Glühkerzenkörper 10 mit seinem Außengewinde in den Zylinderkopf 1 geschraubt. Er liegt somit auf Massepotential. Wird das Glührohr 8 mit einer Wechselspannung definierter Amplitude und Frequenz vom Hochfrequenzgenerator 4 beaufschlagt, so bildet sich wiederum zwischen der auf Massepotential befindlichen brennraumseitigen Zylinderkopfwandung und dem mit hochfrequenter Wechselspannung beaufschlagten Glührohr 8 ein Ionenstrom 11 aus, dessen Stromfunktion als Parameter unter anderem den Brennraumdruck enthält.In this design, the heating element 2 is particularly mounted and is galvanically isolated in the glow plug body 10 the glow plug body 10 with its external thread in the cylinder head 1 screwed. It is therefore at ground potential. The glow tube 8 is defined with an alternating voltage Amplitude and frequency applied by the high-frequency generator 4, this in turn forms between the ground potential located cylinder head wall on the combustion chamber side and the one with high-frequency AC voltage Glow tube 8 from an ion current 11, whose current function as Parameters include the combustion chamber pressure.

    Das in Fig. 2 dargestellte Ausführungsbeispiel hat den besonderen Vorteil, daß bei der dort dargestellten Beschaltung der Glühwiderstand der Glühwendel des Heizstabes 2 als Abschlußwiderstand des Schwingkreises wirkt.The embodiment shown in Fig. 2 has the special advantage that in the circuit shown there the glow resistance of the filament of the heating element 2 as Termination resistance of the resonant circuit acts.

    Dadurch, daß bei den oben beschriebenen Ausbildungen lediglich die potentialfreie Glühkerze beschaltet werden muß und eine zeitdifferenzierende hochfrequente Ionenstromauswertung zur Unterdrückung parasitärer strombeeinflussender Größen erfolgt, läßt sich insbesondere eine brennraumdruckgeführte Motorregelung verwirklichen, die den spezifischen Verbrauch und die Rohemission vermindert. Dazu dient eine einzige Baukomponente mit der Geometrie einer herkömmlichen Glühkerze, die allerdings Glüh- und Sensorfunktion, insbesondere Drucksensorfunktion, erfüllt.The fact that in the training described above only the potential-free glow plug must be connected and a time-differentiating high-frequency ion current evaluation to suppress parasitic current influencing Sizes takes place, a combustion chamber pressure-controlled can in particular Realize engine control, the specific Consumption and raw emissions are reduced. This is what a only component with the geometry of a conventional one Glow plug, however, the glow and sensor function, in particular Pressure sensor function, fulfilled.

    Claims (7)

    Verfahren zum Überwachen der Verbrennungsvorgänge im Brennraum einer Brennkraftmaschine, insbesondere einer Dieselmaschine, in deren Zylinderkopf wenigstens eine Glühkerze mit Heizetab angeordnet ist, dadurch gekennzeichnet, daß der Heizstab der Glühkerze gegenüber dem Zylinderkopf mit einer hochfrequenten Spannung beaufschlagt wird und der Ionenstrom, der sich daraufhin zwischen dem in den Brennraum ragenden Heizstabbereich und der brennraumseitigen Zylinderkopfwand ausbildet, gemessen und ausgewertet wird.Method for monitoring the combustion processes in the Combustion chamber of an internal combustion engine, in particular a diesel engine, at least one glow plug in the cylinder head is arranged with heating tab, characterized in that the Heating rod of the glow plug opposite the cylinder head with one high-frequency voltage is applied and the ion current, which then sits between the one in the combustion chamber protruding heating element area and the cylinder head wall on the combustion chamber side is trained, measured and evaluated. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß als Parameter der Verbrennungsvorgänge der Druck im Brennraum überwacht wird und der gemessene Ionenstrom zu einem brennraumdruckproportionalen Signal ausgewertet wird.A method according to claim 1, characterized in that the pressure in the combustion process as a parameter Combustion chamber is monitored and the measured ion current too a signal proportional to the combustion chamber pressure is evaluated. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß zwischen dem normalen Betrieb der Glühkerze und dem Überwachungsbetrieb mit anliegender hochfrequenter Spannung umgeschaltet wird.A method according to claim 1 or 2, characterized in that that between the normal operation of the glow plug and the monitoring mode with high frequency applied Voltage is switched. Vorrichtung zur Überwachung der Verbrennungsvorgänge im Brennraum einer Brennkraftmaschine zur Durchführung des Verfahrens nach Anspruch 1, gekennzeichnet durch einen Hochfrequenzgenerator (4), dessen Ausgangsspannung am Heizstab (2) der Glühkerze liegt, und einer Auswerteschaltung (3), die parallel dazu zwischen den Heizstab (2) der Glühkerze und den Hochfrequenzgenerator (4) geschaltet ist.Device for monitoring the combustion processes in the combustion chamber of an internal combustion engine to carry out the A method according to claim 1, characterized by a high frequency generator (4), whose output voltage on the heating element (2) the glow plug is located, and an evaluation circuit (3), parallel to it between the heating element (2) of the glow plug and the high-frequency generator (4) is connected. Vorrichtung nach Anspruch 4, gekennzeichnet durch einen Schalter (5) mit zwei Stellungen, der je nach Stellung die Spannung einer Batterie (6) oder die hochfrequente Spannung des Hochfrequenzgenerators (4) an den Heizstab (2) legt.Device according to claim 4, characterized by a switch (5) with two positions, depending on the position the voltage of a battery (6) or the high-frequency voltage the high-frequency generator (4) to the heating element (2) sets. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die Ausgangsspannung des Hochfrequenzgenerators der Batteriespannung überlagert ist, die am Heizstab liegt.Device according to claim 4, characterized in that the output voltage of the high frequency generator Battery voltage is superimposed on the heating element. Vorrichtung nach Anspruch 4, 5 oder 6, dadurch gekennzeichnet, daß der Heizstab (8) der Glühkerze (2) elektrisch isoliert im Zylinderkopf (1) angeordnet ist, die hochfrequente Hochspannung am Glührohr (8) der Glühkerze (2) liegt und die Glühwendel der Glühkerze (2) einerseits mit dem Glührohr (8) verbunden ist und andererseits an Masse liegt.Device according to claim 4, 5 or 6, characterized in that that the heating element (8) of the glow plug (2) is electrical insulated in the cylinder head (1) is arranged high-frequency high voltage at the glow tube (8) of the glow plug (2) lies and the filament of the glow plug (2) on the one hand the glow tube (8) is connected and on the other hand to ground lies.
    EP99111230A 1998-06-26 1999-06-09 Procedure and device for monitoring the combustion in the combustion chamber of an internal-combustion engine Expired - Lifetime EP0967391B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE19828595A DE19828595C2 (en) 1998-06-26 1998-06-26 Method and device for monitoring the combustion processes in the combustion chamber of an internal combustion engine
    DE19828595 1998-06-26

    Publications (3)

    Publication Number Publication Date
    EP0967391A2 true EP0967391A2 (en) 1999-12-29
    EP0967391A3 EP0967391A3 (en) 2002-01-23
    EP0967391B1 EP0967391B1 (en) 2004-09-08

    Family

    ID=7872159

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP99111230A Expired - Lifetime EP0967391B1 (en) 1998-06-26 1999-06-09 Procedure and device for monitoring the combustion in the combustion chamber of an internal-combustion engine

    Country Status (4)

    Country Link
    EP (1) EP0967391B1 (en)
    AT (1) ATE275697T1 (en)
    DE (2) DE19828595C2 (en)
    ES (1) ES2224496T3 (en)

    Cited By (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    FR2878314A1 (en) * 2005-05-19 2006-05-26 Siemens Vdo Automotive Sas Spark or glow plug equipment for internal combustion engine, has path with unit to block return of ac signal, delivered by sensor of plug, towards ground so that power and signal pass through common terminal to which cable is connected

    Families Citing this family (7)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE19838223C2 (en) * 1998-08-22 2003-02-06 Daimler Chrysler Ag Method for determining the ion content after a combustion process in a self-igniting internal combustion engine
    DE10011614A1 (en) * 2000-03-10 2001-09-13 Delphi Tech Inc Procedure for determining commencement of combustion in cylinder in internal combustion engine entails forming difference between last calculated average value and last stored value and comparing this with threshold value
    DE10015277B4 (en) * 2000-03-28 2009-01-08 Infineon Technologies Ag Device for generating an ion current in the combustion chamber of a diesel engine and a glow plug
    JP3894442B2 (en) * 2003-05-14 2007-03-22 三菱電機株式会社 Internal combustion engine control device
    DE102004005537B3 (en) * 2004-02-04 2005-09-01 Beru Ag Process for analyzing the combustion state in the combustion chamber of a combustion engine comprises acquiring and evaluating the high frequency breakdown for analyzing the particle types in the combustion chamber
    DE102005005280B4 (en) * 2005-02-04 2009-09-24 Continental Automotive Gmbh Device for detecting the pressure in a combustion chamber of an internal combustion engine
    DE102010011044B4 (en) 2010-03-11 2012-12-27 Borgwarner Beru Systems Gmbh Method for controlling a glow plug

    Family Cites Families (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    FR2734022B1 (en) * 1995-05-10 1998-06-26 Nippon Soken APPARATUS FOR MONITORING COMBUSTION IN AN INTERNAL COMBUSTION ENGINE
    WO1997038223A1 (en) * 1996-04-10 1997-10-16 Denso Corporation Glow plug, its production process and ion current detector
    DE19614288C1 (en) * 1996-04-11 1997-08-07 Telefunken Microelectron Ion-current measurement circuit e.g. for motor vehicle IC engine combustion chamber

    Non-Patent Citations (1)

    * Cited by examiner, † Cited by third party
    Title
    None

    Cited By (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    FR2878314A1 (en) * 2005-05-19 2006-05-26 Siemens Vdo Automotive Sas Spark or glow plug equipment for internal combustion engine, has path with unit to block return of ac signal, delivered by sensor of plug, towards ground so that power and signal pass through common terminal to which cable is connected

    Also Published As

    Publication number Publication date
    EP0967391B1 (en) 2004-09-08
    ES2224496T3 (en) 2005-03-01
    DE59910432D1 (en) 2004-10-14
    ATE275697T1 (en) 2004-09-15
    DE19828595C2 (en) 2002-09-26
    DE19828595A1 (en) 1999-12-30
    EP0967391A3 (en) 2002-01-23

    Similar Documents

    Publication Publication Date Title
    DE19524539C1 (en) Circuit arrangement for ion current measurement in the combustion chamber of an internal combustion engine
    DE3341880C2 (en)
    DE102006027204B3 (en) Combustion process monitoring method e.g. for petrol engine, involves measuring the high-frequency current and high-frequency voltage for ascertaining impedance of ignited mixture
    DE102009028283B4 (en) Method and device for self-diagnosis of a particle sensor
    EP0752580B1 (en) Measuring circuit for an ionic current
    DE2802202A1 (en) DEVICE FOR DETERMINING PRESSURE FLUCTUATIONS IN THE COMBUSTION CHAMBER OF A COMBUSTION ENGINE
    DE19605803A1 (en) Circuit arrangement for ion current measurement
    EP0967391B1 (en) Procedure and device for monitoring the combustion in the combustion chamber of an internal-combustion engine
    DE69324319T2 (en) Misfire detector
    DE69209078T2 (en) METHOD AND DEVICE FOR MEASURING AND MONITORING ELECTRICAL SPARK BRIDGES
    DE69412039T2 (en) Method and device of a coil ignition with additional discharges for diagnosis
    DE19524499A1 (en) Ignition system for an internal combustion engine
    EP0674103A2 (en) Method for the detection of knocking in an internal combustion engine equipped with a high voltage inductive transistorised ignition device
    DE10319530A1 (en) Monitoring electromechanical actuator, especially piezo-actuator for injector, involves controlling actuator with electrical test signal with alternating component when determining actuator operating parameter
    DE19614288C1 (en) Ion-current measurement circuit e.g. for motor vehicle IC engine combustion chamber
    DE102009055862A1 (en) Method for operating spark-ignition engine of vehicle, involves evaluating electrical measured variables or correcting variables of ignition system for diagnosis of combustion parameter, and diagnosing fuel quality as combustion parameter
    DE19838223C2 (en) Method for determining the ion content after a combustion process in a self-igniting internal combustion engine
    DE19720532C2 (en) Method for determining the state of a spark plug in the combustion chambers of an internal combustion engine
    DE19524540C1 (en) Circuit for measuring ion currents in an engine combustion chamber
    DE4207139C2 (en) Misfire detector system for internal combustion engines
    DE4207141C2 (en) Misfire detector system for detecting misfire in an internal combustion engine
    DE9311065U1 (en) Circuit arrangement for flame detection
    DE19754351C1 (en) Method of measuring the temp. of a coil with an associated inductance and temp. dependent capacitance
    DE10015277B4 (en) Device for generating an ion current in the combustion chamber of a diesel engine and a glow plug
    DE60035013T2 (en) Method for combustion analysis for an internal combustion engine

    Legal Events

    Date Code Title Description
    PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

    Free format text: ORIGINAL CODE: 0009012

    AK Designated contracting states

    Kind code of ref document: A2

    Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

    Kind code of ref document: A2

    Designated state(s): AT DE ES FR GB IT NL SE

    AX Request for extension of the european patent

    Free format text: AL;LT;LV;MK;RO;SI

    PUAL Search report despatched

    Free format text: ORIGINAL CODE: 0009013

    AK Designated contracting states

    Kind code of ref document: A3

    Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

    AX Request for extension of the european patent

    Free format text: AL;LT;LV;MK;RO;SI

    17P Request for examination filed

    Effective date: 20020312

    AKX Designation fees paid

    Free format text: AT DE ES FR GB IT NL SE

    17Q First examination report despatched

    Effective date: 20030410

    GRAP Despatch of communication of intention to grant a patent

    Free format text: ORIGINAL CODE: EPIDOSNIGR1

    GRAS Grant fee paid

    Free format text: ORIGINAL CODE: EPIDOSNIGR3

    GRAA (expected) grant

    Free format text: ORIGINAL CODE: 0009210

    AK Designated contracting states

    Kind code of ref document: B1

    Designated state(s): AT DE ES FR GB IT NL SE

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: NL

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20040908

    REG Reference to a national code

    Ref country code: GB

    Ref legal event code: FG4D

    Free format text: NOT ENGLISH

    REG Reference to a national code

    Ref country code: IE

    Ref legal event code: FG4D

    Free format text: GERMAN

    REF Corresponds to:

    Ref document number: 59910432

    Country of ref document: DE

    Date of ref document: 20041014

    Kind code of ref document: P

    GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

    Effective date: 20041115

    REG Reference to a national code

    Ref country code: SE

    Ref legal event code: TRGR

    NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
    REG Reference to a national code

    Ref country code: ES

    Ref legal event code: FG2A

    Ref document number: 2224496

    Country of ref document: ES

    Kind code of ref document: T3

    REG Reference to a national code

    Ref country code: IE

    Ref legal event code: FD4D

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: IT

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20050609

    ET Fr: translation filed
    PLBE No opposition filed within time limit

    Free format text: ORIGINAL CODE: 0009261

    STAA Information on the status of an ep patent application or granted ep patent

    Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

    26N No opposition filed

    Effective date: 20050609

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: AT

    Payment date: 20070608

    Year of fee payment: 9

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: SE

    Payment date: 20070612

    Year of fee payment: 9

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: ES

    Payment date: 20070628

    Year of fee payment: 9

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: DE

    Payment date: 20070629

    Year of fee payment: 9

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: GB

    Payment date: 20070611

    Year of fee payment: 9

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: FR

    Payment date: 20070612

    Year of fee payment: 9

    EUG Se: european patent has lapsed
    GBPC Gb: european patent ceased through non-payment of renewal fee

    Effective date: 20080609

    REG Reference to a national code

    Ref country code: FR

    Ref legal event code: ST

    Effective date: 20090228

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: DE

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20090101

    Ref country code: AT

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20080609

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: GB

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20080609

    REG Reference to a national code

    Ref country code: ES

    Ref legal event code: FD2A

    Effective date: 20080610

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: FR

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20080630

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: ES

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20080610

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: IT

    Payment date: 20070628

    Year of fee payment: 9

    PGRI Patent reinstated in contracting state [announced from national office to epo]

    Ref country code: IT

    Effective date: 20091201

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: SE

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20080610

    PGRI Patent reinstated in contracting state [announced from national office to epo]

    Ref country code: IT

    Effective date: 20091201