EP0470277A1 - Ignition device for combustion engines - Google Patents

Ignition device for combustion engines Download PDF

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Publication number
EP0470277A1
EP0470277A1 EP90115095A EP90115095A EP0470277A1 EP 0470277 A1 EP0470277 A1 EP 0470277A1 EP 90115095 A EP90115095 A EP 90115095A EP 90115095 A EP90115095 A EP 90115095A EP 0470277 A1 EP0470277 A1 EP 0470277A1
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EP
European Patent Office
Prior art keywords
ignition
control circuit
ignition control
leads
line
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
EP90115095A
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German (de)
French (fr)
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EP0470277B1 (en
Inventor
Günter Dipl.-Ing. Scheid
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Siemens AG
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Siemens AG
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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to EP90115095A priority Critical patent/EP0470277B1/en
Priority to DE59007572T priority patent/DE59007572D1/en
Priority to US07/740,281 priority patent/US5143042A/en
Publication of EP0470277A1 publication Critical patent/EP0470277A1/en
Application granted granted Critical
Publication of EP0470277B1 publication Critical patent/EP0470277B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • the invention relates to an ignition device for internal combustion engines according to the preamble of claim 1 (DE-PS 27 59 154).
  • connection from the second secondary connection or, in the case of a plurality of ignition coils, from the common point via the sensor to the negative pole of the supply voltage can occasionally be interrupted, although experience has shown that ignition still occurs, but this cannot be optimal. This adversely affects the combustion process in the cylinders.
  • the measurement input of the subsequent ignition control circuit can be damaged due to the increased voltage and the control electronics of the engine control can be disturbed in its regular operation.
  • Figure 1 shows a circuit diagram of the ignition device according to the invention.
  • the primary winding 1 of an ignition coil SP is controlled via a switching transistor 3.
  • the first secondary connection of the secondary winding 2 leads to one or more spark plugs ZK and the second secondary connection is connected via a sensor 4 to the negative pole of a supply voltage source, not shown.
  • a further secondary coil of possible further ignition coils, the second secondary connections of which lead to the common point P, is indicated by dashed lines.
  • a measuring line 8 leads to a connection pin 10 of a microprocessor 16 contained in the ignition control device via a signal shaping circuit 17, which converts the measuring signals into square-wave signals with a harmless voltage amplitude.
  • the voltage limiter 6 is designed as a Zener diode.
  • a diagnosis line 9 leads from the connection point between the Zener diode 6 and the resistor 7 to a connection pin 11 of the microprocessor 16.
  • the measuring line 8 is optionally connected in addition to or instead of the connection to the connecting pin 10 via a peak rectifier 14 to a connecting pin 12 of the microprocessor 16, wherein a signal shaping circuit (not shown here) can also be provided between the peak rectifier 14 and the connecting pin 12, and the diagnostic line 9 is also optional additionally or instead of the connection to connection pin 11 via a peak rectifier 15 connected to a connection pin 13 of the microprocessor 16.
  • An indicator lamp L and an arrow A symbolically denote the signals activated by the microprocessor 16, which will be discussed in more detail later.
  • FIG. 2 shows a diagram of the measurement and diagnostic signals a) in the case of faultless operation and b) in the case of faulty operation.
  • the measuring and diagnostic signals are identified in FIG. 2 by numbers 8 to 13, which correspond to those lines or connecting pins from FIG. 1 on which these signals appear.
  • Roman numerals denote the cylinders of the internal combustion engine, the ignition pulses of which are assigned to the measurement and diagnostic signals. This cylinder assignment takes place in a known manner via cam and crankshaft pulses. In this way, the measurement and diagnostic signals can be evaluated separately for each cylinder.
  • the duration of the measurement signals from the microprocessor 16 is counted in real time in a known manner.
  • the pulses on the measuring line 8 reach a voltage amplitude which does not reach the pass threshold of the zener diode 6, so that a zero signal appears at the connecting pins 11 and 13 (dashed lines 11, 13 in FIG. 2a).
  • This diagnostic signal is evaluated by the microprocessor 16.
  • an indicator lamp L is switched on and / or an error is displayed or stored in the microprocessor 16 and, indicated by the arrow A in FIG. 1, is output as an error signal for further processing.
  • the measurement signal and / or the diagnostic signal are led via tip rectifiers 14 and 15 to connection pins 12 and 13 of the microprocessor 16 and can be evaluated there at a later point in time during the cycle time of the respective cylinder (until the ignition pulse of the next cylinder) when the microprocessor is no longer concerned with real-time measurement, see dotted lines 12 in FIGS. 2a) and 2b) and dash-dotted line 13 in FIG. 2b).
  • the peak value rectifier capacitors are discharged by a reset pulse.

Abstract

Ignition device for combustion engines, having at least one ignition coil with two separate secondary terminals, one of which is connected in each case to earth via a common sensor, with evaluation of the sensor signal and of a diagnosis signal, derived therefrom, in an ignition control circuit which contains a microprocessor, with regard to duration and amplitude of the measurement signal (ignition current) and presence of a diagnosis signal. <IMAGE>

Description

Die Erfindung betrifft eine Zündeinrichtung für Brennkraftmaschinen nach dem Oberbegriff von Anspruch 1 (DE-PS 27 59 154).The invention relates to an ignition device for internal combustion engines according to the preamble of claim 1 (DE-PS 27 59 154).

Bei der bekannten Zündeinrichtung ist eine Regelung der Funkenentladedauer der Zündkerzen vorgesehen. Dies wird dadurch erreicht, daß die Dauer des über einen Sensor ermittelten Funkenentladestroms gemessen und mit einem Sollwert verglichen wird und aufgrund des Vergleichsergebnisses die Schließdauer der Primärwicklung der Zündspule nachgeregelt wird.In the known ignition device, regulation of the spark discharge duration of the spark plugs is provided. This is achieved in that the duration of the spark discharge current determined by a sensor is measured and compared with a target value and the closing duration of the primary winding of the ignition coil is readjusted on the basis of the comparison result.

Die Verbindung vom zweiten Sekundäranschluß bzw. bei mehreren Zündspulen vom gemeinsamen Punkt über den Sensor zum Minuspol der Versorgungsspannung kann gelegentlich unterbrochen sein, wobei dann erfahrungsgemäß zwar immer noch eine Zündung erfolgt, welche aber nicht optimal sein kann. Dadurch wird der Verbrennungsvorgang in den Zylindern nachteilig beeinflußt. Der Meßeingang der nachfolgenden Zündsteuerschaltung kann wegen der erhöhten Spannung beschädigt werden und die Steuerelektronik der Motorsteuerung kann in ihrem regulären Betrieb gestört werden.The connection from the second secondary connection or, in the case of a plurality of ignition coils, from the common point via the sensor to the negative pole of the supply voltage can occasionally be interrupted, although experience has shown that ignition still occurs, but this cannot be optimal. This adversely affects the combustion process in the cylinders. The measurement input of the subsequent ignition control circuit can be damaged due to the increased voltage and the control electronics of the engine control can be disturbed in its regular operation.

Aufgabe der vorliegenden Erfindung ist es deshalb, die bekannte Zündeinrichtung so weiterzubilden, daß dieser Fehler erkannt werden kann und ein daraus resultierendes Fehlersignal zum Schutz der Zündsteuerschaltung verwendet werden kann.It is therefore an object of the present invention to develop the known ignition device in such a way that this error can be recognized and a resulting error signal can be used to protect the ignition control circuit.

Diese Aufgabe wird durch die im Kennzeichen des Anspruchs 1 genannten Merkmale gelöst.This object is achieved by the features mentioned in the characterizing part of claim 1.

Die Erfindung wird anhand der Zeichnung näher erläutert.The invention is explained in more detail with reference to the drawing.

Es zeigen:

  • Figur 1 ein Schaltbild und
  • Figur 2 ein Diagramm der Meß- und Diagnosesignale
    • a) bei fehlerfreiem Betrieb und
    • b) bei fehlerhaftem Betrieb.
Show it:
  • Figure 1 is a circuit diagram and
  • Figure 2 is a diagram of the measurement and diagnostic signals
    • a) in the case of faultless operation and
    • b) in the event of incorrect operation.

Figur 1 zeigt ein Schaltbild der erfindungsgemäßen Zündeinrichtung. Die Primärwicklung 1 einer Zündspule SP wird über einen Schalttransistor 3 angesteuert. Der erste Sekundäranschluß der Sekundärwicklung 2 führt zu einer oder mehreren Zündkerzen ZK und der zweite Sekundäranschluß ist über einen Sensor 4 mit dem Minuspol einer nicht dargestellten Versorgungsspannungsquelle verbunden. Gestrichelt angedeutet ist eine weitere Sekundärspule von möglichen weiteren Zündspulen, deren zweite Sekundäranschlüsse auf den gemeinsamen Punkt P führen.Figure 1 shows a circuit diagram of the ignition device according to the invention. The primary winding 1 of an ignition coil SP is controlled via a switching transistor 3. The first secondary connection of the secondary winding 2 leads to one or more spark plugs ZK and the second secondary connection is connected via a sensor 4 to the negative pole of a supply voltage source, not shown. A further secondary coil of possible further ignition coils, the second secondary connections of which lead to the common point P, is indicated by dashed lines.

Von diesem gemeinsamen Punkt P führt eine Meßleitung 8 zu einem Anschlußpin 10 eines in der Zündsteuereinrichtung enthaltenen Mikroprozessors 16 über eine Signalformerschaltung 17, welche die Meßsignale in Rechtecksignale mit ungefährlicher Spannungsamplitude verwandelt.From this common point P, a measuring line 8 leads to a connection pin 10 of a microprocessor 16 contained in the ignition control device via a signal shaping circuit 17, which converts the measuring signals into square-wave signals with a harmless voltage amplitude.

Parallel zu dem Sensor 4 liegt eine Reihenschaltung aus einem Spannungsbegrenzer 6 und einem Widerstand 7. Der Spannungsbegrenzer 6 ist als Zenerdiode ausgebildet.Parallel to the sensor 4 is a series connection of a voltage limiter 6 and a resistor 7. The voltage limiter 6 is designed as a Zener diode.

Vom Verbindungpunkt zwischen Zenerdiode 6 und Widerstand 7 führt eine Diagnoseleitung 9 zu einem Anschlußpin 11 des Mikroprozessors 16.A diagnosis line 9 leads from the connection point between the Zener diode 6 and the resistor 7 to a connection pin 11 of the microprocessor 16.

Die Meßleitung 8 ist wahlweise zusätzlich oder anstelle der Verbindung mit Anschlußpin 10 über einen Spitzengleichrichter 14 mit einem Anschlußpin 12 des Mikroprozessors 16 verbunden, wobei zwischen Spitzengleichrichter 14 und Anschlußpin 12 ebenfalls eine hier nicht dargestellte Signalformerschaltung vorgesehen sein kann, und auch die Diagnoseleitung 9 ist wahlweise zusätzlich oder anstelle der Verbindung mit Anschlußpin 11 über einen Spitzengleichrichter 15 mit einem Anschlußpin 13 des Mikroprozessors 16 verbunden. Eine Anzeigelampe L und ein Pfeil A bezeichnen symbolisch die vom Mikroprozessor 16 aktivierten Signale, auf die später noch näher eingegangen wird.The measuring line 8 is optionally connected in addition to or instead of the connection to the connecting pin 10 via a peak rectifier 14 to a connecting pin 12 of the microprocessor 16, wherein a signal shaping circuit (not shown here) can also be provided between the peak rectifier 14 and the connecting pin 12, and the diagnostic line 9 is also optional additionally or instead of the connection to connection pin 11 via a peak rectifier 15 connected to a connection pin 13 of the microprocessor 16. An indicator lamp L and an arrow A symbolically denote the signals activated by the microprocessor 16, which will be discussed in more detail later.

Figur 2 zeigt ein Diagramm der Meß- und Diagnosesignale a) bei fehlerfreiem Betrieb und b) bei fehlerhaftem Betrieb.FIG. 2 shows a diagram of the measurement and diagnostic signals a) in the case of faultless operation and b) in the case of faulty operation.

Die Meß- und Diagnosesignale sind in Figur 2 durch Zahlen 8 bis 13 gekennzeichnet, welche denjenigen Leitungen oder Anschlußpins aus Figur 1 entsprechen, an welchen diese Signale erscheinen. Mit römischen Ziffern sind die Zylinder der Brennkraftmaschine bezeichnet, deren Zündimpulsen die Meß- und Diagnosesignale zugeordnet sind. Diese Zylinderzuordnung erfolgt in bekannter Weise über Nocken-und Kurbelwellenimpulse. Auf diese Weise können für jeden Zylinder getrennt die Meß- und Diagnosesignale ausgewertet werden.The measuring and diagnostic signals are identified in FIG. 2 by numbers 8 to 13, which correspond to those lines or connecting pins from FIG. 1 on which these signals appear. Roman numerals denote the cylinders of the internal combustion engine, the ignition pulses of which are assigned to the measurement and diagnostic signals. This cylinder assignment takes place in a known manner via cam and crankshaft pulses. In this way, the measurement and diagnostic signals can be evaluated separately for each cylinder.

Bei jeder Unterbrechung des Stromes in der Primärwicklung 1 der Zündspule SP durch den Schalttransistor 3 wird in der Sekundärwicklung 2 ein rasch ansteigender Zündimpuls induziert, wobei der durch die Zündkerzen ZK fließende Strom am Sensor 4 Spannungsimpulse erzeugt, welche als Meßsignale auf der Meßleitung 8 erscheinen, siehe Signalzug 8 bei fehlerfreiem Betrieb in Figur 2a) und bei fehlerhaftem Betrieb infolge einer Unterbrechung am Sensor 4 in Figur 2b). Über die Signalformerschaltung 17 werden die Meßsignale zu etwa rechteckförmigen Signalen 10 (Figur 2a) gewandelt.Each time the current in the primary winding 1 of the ignition coil SP is interrupted by the switching transistor 3, a rapidly increasing ignition pulse is induced in the secondary winding 2, the current flowing through the spark plugs ZK generating voltage pulses at the sensor 4 which appear as measurement signals on the measurement line 8. see signal train 8 in the case of faultless operation in FIG. 2a) and in the case of faulty operation as a result of an interruption at the sensor 4 in FIG. Via the signal shaping circuit 17, the measurement signals are converted into approximately rectangular signals 10 (FIG. 2a).

Als Maß für die Zündfunkendauer wird in bekannter Weise die Dauer der Meßsignale vom Mikroprozessor 16 in Echtzeitbetrieb ausgezählt.As a measure of the spark duration, the duration of the measurement signals from the microprocessor 16 is counted in real time in a known manner.

Bei fehlerfreiem Betrieb erreichen die Impulse auf der Meßleitung 8 eine Spannungsamplitude, welche die Durchlaßschwelle der Zenerdiode 6 nicht erreicht, so daß an den Anschlußpins 11 und 13 Nullsignal erscheint, gestrichelte Linien 11, 13 in Figur 2a).When operating correctly, the pulses on the measuring line 8 reach a voltage amplitude which does not reach the pass threshold of the zener diode 6, so that a zero signal appears at the connecting pins 11 and 13 (dashed lines 11, 13 in FIG. 2a).

Bei fehlerhaftem Betrieb erreicht die Amplitude des Meßsignals auf der Meßleitung 8 ein Mehrfaches des Wertes bei fehlerfreiem Betrieb, so daß die Zenerdiode 6 bei jedem Meßsignalimpuls 8 durchlässig wird und die Spannung begrenzt, so daß am Widerstand 7 sowie am Anschlußpin 11 ein Diagnosesignal erscheint, siehe gestrichelte Impulse 11 in Figur 2b).In the event of incorrect operation, the amplitude of the measurement signal on the measurement line 8 reaches a multiple ches of the value in error-free operation, so that the Zener diode 6 becomes transparent with each measurement signal pulse 8 and limits the voltage so that a diagnostic signal appears at the resistor 7 and at the connection pin 11, see dashed pulses 11 in Figure 2b).

Dieses Diagnosesignal wird vom Mikroprozessor 16 ausgewertet.This diagnostic signal is evaluated by the microprocessor 16.

Bei einer vorgegebenen Zahl fehlerhafter Zündimpulse wird eine Anzeigelampe L eingeschaltet und/oder im Mikroprozessor 16 ein Fehler angezeigt bzw. gespeichert und, durch den Pfeil A in Figur 1 angedeutet, als Fehlersignal zur Weiterverarbeitung ausgegeben.With a predetermined number of faulty ignition pulses, an indicator lamp L is switched on and / or an error is displayed or stored in the microprocessor 16 and, indicated by the arrow A in FIG. 1, is output as an error signal for further processing.

Da die Dauer der Meßsignale und damit der Zündfunken vom Mikroprozessor 16 in Echtzeit ermittelt wird, kann es schwierig sein, auch die Amplitude des Meßsignals und das Vorhandensein eines Diagnosesignals in Echtzeit zu ermitteln. Aus diesem Grund werden das Meßsignal und/oder das Diagnosesignal über Spitzengleichrichter 14 bzw. 15 zu Anschlußpins 12 bzw. 13 des Mikroprozessors 16 geführt und können dort zu einem späteren Zeitpunkt während der Zykluszeit des jeweiligen Zylinders (bis zum Zündimpuls des nächsten Zylinders) ausgewertet werden, wenn der Mikroprozessor nicht mehr mit Echtzeitmessung befaßt ist, siehe gepunktete Linien 12 in Figur 2a) und 2b) sowie strichpunktierte Linie 13 in Figur 2b). Kurz vor Erscheinen des nächsten Zündimpulses erfolgt, sofern erforderlich, durch einen Resetimpuls eine Entladung der Spitzenwertgleichrichter-Kondensatoren.Since the duration of the measurement signals and thus the ignition spark is determined by the microprocessor 16 in real time, it can be difficult to determine the amplitude of the measurement signal and the presence of a diagnostic signal in real time. For this reason, the measurement signal and / or the diagnostic signal are led via tip rectifiers 14 and 15 to connection pins 12 and 13 of the microprocessor 16 and can be evaluated there at a later point in time during the cycle time of the respective cylinder (until the ignition pulse of the next cylinder) when the microprocessor is no longer concerned with real-time measurement, see dotted lines 12 in FIGS. 2a) and 2b) and dash-dotted line 13 in FIG. 2b). Shortly before the next ignition pulse appears, if necessary, the peak value rectifier capacitors are discharged by a reset pulse.

Claims (4)

1. Zündeinrichtung für Brennkraftmaschinen, mit wenigstens einer Zündspule (SP) mit zwei von den Primäranschlüssen getrennten Sekundäranschlüssen, wobei der erste Sekundäranschluß direkt oder über einen Verteiler zu einer oder mehreren Zündkerzen (ZK) führt, und wobei der zweite Sekundäranschluß der einen oder aller Zündspulen auf einen gemeinsamen Punkt (P) und von diesem über einen Sensor (4) zum Minuspol einer Versorgungsspannungsquelle führt, und mit einer von dem gemeinsamen Punkt (P) zu einer Zündsteuerschaltung (16) führenden Meßleitung (8), wobei an der Meßleitung abgreifbare Meßsignale in der Zündsteuerschaltung (16) auswertbar sind,
dadurch gekennzeichnet,
daß parallel zum Sensor (4) die Reihenschaltung aus einem Spannungsbegrenzer (6) und einem Widerstand (7) geschaltet ist, daß von dem Verbindungspunkt zwischen Spannungsbegrenzer (6) und Widerstand (7) eine Diagnoseleitung (9) zur Zündsteuerschaltung (16) führt, und daß an der Diagnoseleitung (9) abgreifbare Diagnosesignale in der Zündsteuerschaltung (16) auswertbar sind.1. Ignition device for internal combustion engines, with at least one ignition coil (SP) with two secondary connections separate from the primary connections, the first secondary connection leading directly or via a distributor to one or more spark plugs (ZK), and wherein the second secondary connection of one or all ignition coils leads to a common point (P) and from there via a sensor (4) to the negative pole of a supply voltage source, and with a measuring line (8) leading from the common point (P) to an ignition control circuit (16), measuring signals which can be tapped at the measuring line can be evaluated in the ignition control circuit (16),
characterized,
that the series circuit consisting of a voltage limiter (6) and a resistor (7) is connected in parallel to the sensor (4), that a diagnosis line (9) leads from the connection point between the voltage limiter (6) and the resistor (7) to the ignition control circuit (16), and that diagnostic signals that can be tapped at the diagnostic line (9) can be evaluated in the ignition control circuit (16). 2. Zündeinrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß vom gemeinsamen Punkt (P) eine zweite Meßleitung über einen Spitzengleichrichter (14) zur Zündsteuerschaltung (12, 16) führt.2. Ignition device according to claim 1,
characterized,
that from the common point (P) leads a second measuring line via a peak rectifier (14) to the ignition control circuit (12, 16). 3. Zündeinrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß vom Verbindungspunkt zwischen Spannungsbegrenzer (6) und Widerstand (7) eine zweite Diagnoseleitung über einen Spitzengleichrichter (15) zur Zündsteuerschaltung (13, 16) führt.3. Ignition device according to claim 1,
characterized,
that from the connection point between the voltage limiter (6) and the resistor (7) leads a second diagnostic line via a peak rectifier (15) to the ignition control circuit (13, 16). 4. Zündeinrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß die Zündsteuereinrichtung (16) einen Mikroprozessor enthält.4. Ignition device according to claim 1,
characterized,
that the ignition control device (16) contains a microprocessor.
EP90115095A 1990-08-06 1990-08-06 Ignition device for combustion engines Expired - Lifetime EP0470277B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP90115095A EP0470277B1 (en) 1990-08-06 1990-08-06 Ignition device for combustion engines
DE59007572T DE59007572D1 (en) 1990-08-06 1990-08-06 Ignition device for internal combustion engines.
US07/740,281 US5143042A (en) 1990-08-06 1991-08-05 Ignition device for internal combustion engines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP90115095A EP0470277B1 (en) 1990-08-06 1990-08-06 Ignition device for combustion engines

Publications (2)

Publication Number Publication Date
EP0470277A1 true EP0470277A1 (en) 1992-02-12
EP0470277B1 EP0470277B1 (en) 1994-10-26

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EP90115095A Expired - Lifetime EP0470277B1 (en) 1990-08-06 1990-08-06 Ignition device for combustion engines

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EP (1) EP0470277B1 (en)
DE (1) DE59007572D1 (en)

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DE4142532C1 (en) * 1991-12-21 1993-05-06 Audi Ag, 8070 Ingolstadt, De Ignition unit for IC engine with several cylinders and ignition circuits - has diagnostic resistance connected to each ignition coil on sec. HT side between coil and earth with resistance integrated in package with coil
US5301649A (en) * 1991-12-17 1994-04-12 Siemens Aktiengesellschaft Ignition device for internal combustion engines
US5631564A (en) * 1994-03-18 1997-05-20 Siemens Aktiengesellschaft Method and apparatus for monitoring the ignition device of an internal combustion engine
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ITMI20090817A1 (en) * 2009-05-12 2010-11-13 Eldor Corp Spa DEVICE FOR THE DIAGNOSIS OF THE IGNITION DEVICE IN AN INTERNAL COMBUSTION ENGINE.
CN112368476A (en) * 2018-06-19 2021-02-12 株式会社电装 Ignition control system for internal combustion engine

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5301649A (en) * 1991-12-17 1994-04-12 Siemens Aktiengesellschaft Ignition device for internal combustion engines
DE4142532C1 (en) * 1991-12-21 1993-05-06 Audi Ag, 8070 Ingolstadt, De Ignition unit for IC engine with several cylinders and ignition circuits - has diagnostic resistance connected to each ignition coil on sec. HT side between coil and earth with resistance integrated in package with coil
US5631564A (en) * 1994-03-18 1997-05-20 Siemens Aktiengesellschaft Method and apparatus for monitoring the ignition device of an internal combustion engine
DE19956032A1 (en) * 1999-11-22 2001-05-23 Volkswagen Ag Misfire detection circuit in an internal combustion engine
ITMI20090817A1 (en) * 2009-05-12 2010-11-13 Eldor Corp Spa DEVICE FOR THE DIAGNOSIS OF THE IGNITION DEVICE IN AN INTERNAL COMBUSTION ENGINE.
WO2010130448A1 (en) * 2009-05-12 2010-11-18 Eldor Corporation S.P.A. Device for diagnosing the ignition device in an internal combustion engine
CN112368476A (en) * 2018-06-19 2021-02-12 株式会社电装 Ignition control system for internal combustion engine
CN112368476B (en) * 2018-06-19 2022-06-24 株式会社电装 Ignition control system for internal combustion engine

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DE59007572D1 (en) 1994-12-01
US5143042A (en) 1992-09-01
EP0470277B1 (en) 1994-10-26

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