EP0561808A1 - Ignition system for internal-combustion engines. - Google Patents

Ignition system for internal-combustion engines.

Info

Publication number
EP0561808A1
EP0561808A1 EP91919780A EP91919780A EP0561808A1 EP 0561808 A1 EP0561808 A1 EP 0561808A1 EP 91919780 A EP91919780 A EP 91919780A EP 91919780 A EP91919780 A EP 91919780A EP 0561808 A1 EP0561808 A1 EP 0561808A1
Authority
EP
European Patent Office
Prior art keywords
voltage
transistor
ignition
resistor
circuit arrangement
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
EP91919780A
Other languages
German (de)
French (fr)
Other versions
EP0561808B1 (en
Inventor
Richard Schleupen
Ulrich Bentel
Klaus Heyke
Ulrich Nelle
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0561808A1 publication Critical patent/EP0561808A1/en
Application granted granted Critical
Publication of EP0561808B1 publication Critical patent/EP0561808B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P3/00—Other installations
    • F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
    • F02P3/04—Layout of circuits
    • F02P3/055—Layout of circuits with protective means to prevent damage to the circuit, e.g. semiconductor devices or the ignition coil
    • F02P3/0552—Opening or closing the primary coil circuit with semiconductor devices
    • 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
    • F02P11/00—Safety means for electric spark ignition, not otherwise provided for
    • F02P11/06—Indicating unsafe conditions
    • 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
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B1/00—Engines characterised by fuel-air mixture compression
    • F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
    • F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/027—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four

Definitions

  • the invention relates to a circuit arrangement for ignition systems according to the preamble of the main claim.
  • the solution according to the invention with the characterizing features of the main claim has the advantage over the known that a current is generated which is proportional to the operating voltage, which is monitored by a measuring element, and whereby exact information about the course of combustion is obtained.
  • Another advantage is the decoupling of the voltage signal and the coupling of the control signal for the ignition transistor via a signal line.
  • FIG. 1 shows the basic circuit for detecting the burning voltage
  • FIG. 2 shows the basic circuit in a modified form. Description of the embodiments
  • the basic circuit shown in FIG. 1 for detecting the internal voltage shows an ignition coil 1 consisting of a primary winding 2 and a secondary winding 3, which is connected to a spark plug 4 for the transmission of the high voltage.
  • the primary winding 2 is connected on the one hand via a supply line 5 to a battery voltage U B and on the other hand via a supply line 6 and via an ignition transistor 7 to ground potential.
  • the lead 5 is connected to the base of a pnp transistor 8, while this is connected to the lead 6 on the emitter side via a resistor 9 serving as an emitter follower.
  • the pnp transistor 8 is assigned a resistor 10, which on the other hand is connected to ground potential. The voltage drop across this resistor is detected between terminal 11 and ground potential.
  • the current flow in the primary winding 2 of the ignition coil 1 is switched on via the ignition transistor 7, that is to say energy can be stored in the primary winding 2 when the ignition transistor is activated at the base. If the control of this control transistor 7 is now interrupted, a high voltage is induced in the secondary winding 3, which is then passed on to the spark plug 4. If the explosion course is correct, the ignition spark burns out with a typical voltage curve, this burning voltage (U BRENN ) in turn being transformed into the primary winding 2 of the ignition coil 1.
  • This operating voltage transformed on the primary side also controls the pnp transistor 8. corresponding to the resistor 9 as an emitter follower, so that it converts the operating voltage into a collector current (Ic) proportional to it.
  • the collector current Ic is therefore approximately proportional to the quotient of the operating voltage (U BRENN ) minus the base-emitter voltage (U BE ) of the transistor 8 and the resistance value of the as
  • this resistor 9 has a constant value and (U BE ) is negligibly small, the collector current Ic is approximately proportional to the operating voltage U BRENN .
  • This current Ic flows from the collector of transistor 8 via resistor 10 to ground potential, it being converted at resistor 10 into an easily evaluable voltage signal which is tapped between terminal 11 and ground potential.
  • This voltage signal can now be fed via terminal 11 to evaluation electronics which, for example, monitors the function of the ignition system by comparing the detected voltage signal with a stored signal curve and initiates appropriate protective measures if errors are detected. In order to avoid that temperature influences falsify the measurement result, it is expedient if the resistors 9 and 10 have the same temperature coefficient.
  • FIG. 2 shows the basic circuit described in a slightly modified
  • a diode 12 is connected in this figure between the base of the transistor 8 and the battery voltage U B , which ensures that the base-emitter path of the ignition transistor 8 does not break down when the battery voltage is high and the transistor 7 is switched on.
  • a resistor 13 with a downstream Zener diode 14 between lead 6 and the base of a transistor 15 and a further resistor 16 are provided.
  • the pnp transistor 15 is connected on the emitter side to ground potential and on the collector side to the base of the ignition transistor 7.
  • the further resistor 16 is between the terminal 11 and the base of the ignition transistor 7.

Landscapes

  • 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)

Abstract

Il est proposé un circuit servant, dans des systèmes d'allumage pour moteurs à combustion interne, à la mesure de la tension d'amorçage, transformée du côté primaire d'une bobine d'allumage, sur la bougie d'allumage. Le circuit comporte un transformateur de tension (8) dont le système commandé est déclenché par la tension d'amorçage transformée du côté primaire (2), de manière à générer un courant pouvant être amené à un organe de mesure et proportionnel à la tension d'amorçage.A circuit is proposed which serves, in ignition systems for internal combustion engines, for measuring the ignition voltage, transformed on the primary side of an ignition coil, on the spark plug. The circuit comprises a voltage transformer (8), the controlled system of which is triggered by the transformed starting voltage on the primary side (2), so as to generate a current which can be supplied to a measuring device and proportional to the voltage d 'priming.

Description

Zündanlage für Brennkraftmaschinen  Ignition system for internal combustion engines
Stand der Technik State of the art
Die Erfindung geht aus von einer Schaltungsanordnung für Zündanlagen nach der Gattung des Hauptanspruchs. The invention relates to a circuit arrangement for ignition systems according to the preamble of the main claim.
Es ist bereits eine Zündanlage aus der US-PS 4 918 389 beziehungsweise der entsprechenden EP-A-0 344 349 bekannt, bei der die Überwachung der Zündanlage anhand einer primärseitigen Überwachung der Funkendauer erfolgt. Dieses Verfahren hat jedoch den Nachteil, daß es keine exakten Informationen über den Verbrennungsverlauf liefert, um so Rückschlüsse über die Funktion der Zünd- und/oder Einspritzanlage zu ziehen. Fehlfunktionen können also nicht mit Sicherheit erkannt werden, wodurch es zu einem erhöhten Schadstoffaustausch und zu einer Gefährdung des Katalysators kommen kann. An ignition system is already known from US Pat. No. 4,918,389 or the corresponding EP-A-0 344 349, in which the ignition system is monitored by monitoring the spark duration on the primary side. However, this method has the disadvantage that it does not provide exact information about the course of the combustion, in order to draw conclusions about the function of the ignition and / or injection system. Malfunctions can therefore not be detected with certainty, which can lead to increased pollutant exchange and a risk to the catalytic converter.
Um den Forderungen der Umweltbehörden an die Abgaswerte gerecht zu werden, ist man bestrebt, Zündsteuerungen zu entwickeln, die einen möglichst minimalen Schadstoffausstoß bei Viertakt-Ottomotoren gewährleisten. Eine Möglichkeit einer Zünd- und Explosionserkennung ist mittels Drucksensor oder optischem Sensor gegeben. Jedoch ist eine solche Funktionsüberwachung durch die in die Zündanlage zusätzlich eingebauten Sensoren kostenaufwendig. In order to meet the requirements of the environmental authorities regarding exhaust gas values, efforts are being made to develop ignition controls that ensure the lowest possible emission of pollutants in four-stroke gasoline engines. A possibility of ignition and explosion detection is given by means of a pressure sensor or an optical sensor. However, such function monitoring is expensive due to the sensors additionally installed in the ignition system.
Vorteile der Erfindung Advantages of the invention
Die erfindungsgemäße Lösung mit den kennzeichnenden Merkmalen des Hauptanspruchs hat gegenüber dem Bekannten den Vorteil, daß ein Strom erzeugt wird, der proportional der Brennspannung ist, welcher über ein Meßglied überwacht wird und wodurch genaue Informationen über den Verbrennungsverlauf gewonnen werden. The solution according to the invention with the characterizing features of the main claim has the advantage over the known that a current is generated which is proportional to the operating voltage, which is monitored by a measuring element, and whereby exact information about the course of combustion is obtained.
Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen der im Hauptanspruch angegebenen Schaltungsanordnung möglich. Besonders vorteilhaft ist, daß zur Vermeidung von Temperatureinflüssen die verwendeten Widerstände den gleichen Temperaturkoeffizienten haben. The measures listed in the subclaims permit advantageous developments and improvements of the circuit arrangement specified in the main claim. It is particularly advantageous that the resistances used have the same temperature coefficient in order to avoid temperature influences.
Ein weiterer Vorteil ist die Auskopplung des Spannungssignals und die Einkopplung des Steuersignals für den Zündtransistor über eine Signalleitung. Another advantage is the decoupling of the voltage signal and the coupling of the control signal for the ignition transistor via a signal line.
Zeichnung drawing
Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen Figur 1 die Grundschaltung zur Erfassung der Brennspannung und Figur 2 die Grundschaltung in abgewandelter Form. Beschreibung der Ausführungsbeispiele Embodiments of the invention are shown in the drawing and explained in more detail in the following description. FIG. 1 shows the basic circuit for detecting the burning voltage and FIG. 2 shows the basic circuit in a modified form. Description of the embodiments
Die in Figur 1 dargestellte Grundschaltung zur Erfassung der Brennspannung zeigt eine Zündspule 1 bestehend aus einer Primärwicklung 2 und einer Sekundärwicklung 3, welche mit einer Zündkerze 4 zur Weitergabe der Hochspannung verbunden ist. Die Primärwicklung 2 ist einerseits über eine Zuleitung 5 mit einer Batteriespannung UB und andererseits über eine Zuleitung 6 und über einen Zündtransistor 7 mit Massepotential verbunden. Die Zuleitung 5 ist mit der Basis eines pnp-Transistors 8 verbunden während dieser emitterseitig über einen als Emitterfolger dienenden Widerstand 9 mit der Zuleitung 6 verbunden ist. Auf der Kollektorseite ist dem pnp-Transistor 8 ein Widerstand 10 zugeordnet, welcher andererseits an Massepotential angeschlossen ist. Die an diesem Widerstand abfallende Spannung wird zwischen Klemme 11 und Massepotential erfaßt. The basic circuit shown in FIG. 1 for detecting the internal voltage shows an ignition coil 1 consisting of a primary winding 2 and a secondary winding 3, which is connected to a spark plug 4 for the transmission of the high voltage. The primary winding 2 is connected on the one hand via a supply line 5 to a battery voltage U B and on the other hand via a supply line 6 and via an ignition transistor 7 to ground potential. The lead 5 is connected to the base of a pnp transistor 8, while this is connected to the lead 6 on the emitter side via a resistor 9 serving as an emitter follower. On the collector side, the pnp transistor 8 is assigned a resistor 10, which on the other hand is connected to ground potential. The voltage drop across this resistor is detected between terminal 11 and ground potential.
Die eben beschriebene Schaltungsanordnung in Figur 1 hat folgende Wirkungsweise. The circuit arrangement just described in Figure 1 has the following mode of operation.
Über den Zündtransistor 7 wird der Stromfluß in der Primärwicklung 2 der Zündspule 1 eingeschaltet, das heißt, bei Ansteuerung des Zündtransistors an der Basis kann in der Primärwicklung 2 Energie gespeichert werden. Wird nun die Ansteuerung dieses Steuertransistors 7 unterbrochen, so wird in der Sekundärwicklung 3 eine Hochspannung induziert, die dann an die Zündkerze 4 weitergegeben wird. Bei ordnungsgemäßem Explosionsverlauf brennt der Zündfunke mit einem typischen Spannungsverlauf aus, wobei diese Brennspannung (UBRENN) wiederum in die Primärwicklung 2 der Zündspule 1 transformiert wird. Diese auf die Primärseite transformierte Brennspannung steuert den pnp-Transistor 8 mit. dem Widerstand 9 als Emitterfolger entsprechend an, so daß dieser die Brennspannung in einen zu ihr proportionalen Kollektorstrom (Ic) umwandelt. The current flow in the primary winding 2 of the ignition coil 1 is switched on via the ignition transistor 7, that is to say energy can be stored in the primary winding 2 when the ignition transistor is activated at the base. If the control of this control transistor 7 is now interrupted, a high voltage is induced in the secondary winding 3, which is then passed on to the spark plug 4. If the explosion course is correct, the ignition spark burns out with a typical voltage curve, this burning voltage (U BRENN ) in turn being transformed into the primary winding 2 of the ignition coil 1. This operating voltage transformed on the primary side also controls the pnp transistor 8. corresponding to the resistor 9 as an emitter follower, so that it converts the operating voltage into a collector current (Ic) proportional to it.
Der Kollektorstrom Ic ist demzufolge etwa proportional dem Quotionenten aus Brennspannung (UBRENN) minus der Basis-Emitterspannung (UBE) des Transistors 8 und dem Widerstandswert, des alsThe collector current Ic is therefore approximately proportional to the quotient of the operating voltage (U BRENN ) minus the base-emitter voltage (U BE ) of the transistor 8 and the resistance value of the as
Emitterfolge ausgebildeten Widerstandes 9. Da dieser Widerstand 9 jedoch einen konstanten Wert hat und(UBE) vernachlässigbar gering ist, ist der Kollektorstrom Ic etwa proportional der Brennspannung UBRENN. Dieser Strom Ic fließt vom Kollektor des Transistors 8 über den Widerstand 10 zum Massepotential, wobei er am Widerstand 10 in ein leicht auswertbares Spannungssignal umgewandelt wird, das zwischen Klemme 11 und Massepotential abgegriffen wird. Dieses Spannungssignal kann nun über Klemme 11 einer Auswerteelektronik zugeführt werden, die beispielsweise über einen Vergleich des erfaßten Spannungssignals mit einem gespeicherten Signalverlauf eine Überwachung der Funktion der Zündanlage vornimmt und bei erkannten Fehlern entsprechende Schutzmaßnahmen einleitet. Um zu vermeiden, daß Temperatureinflüsse das Meßergebnis verfälschen, ist es zweckmäßig, wenn die Widerstände 9 und 10 den gleichen Temperaturkoeffizienten haben. Emitter sequence formed resistor 9. However, since this resistor 9 has a constant value and (U BE ) is negligibly small, the collector current Ic is approximately proportional to the operating voltage U BRENN . This current Ic flows from the collector of transistor 8 via resistor 10 to ground potential, it being converted at resistor 10 into an easily evaluable voltage signal which is tapped between terminal 11 and ground potential. This voltage signal can now be fed via terminal 11 to evaluation electronics which, for example, monitors the function of the ignition system by comparing the detected voltage signal with a stored signal curve and initiates appropriate protective measures if errors are detected. In order to avoid that temperature influences falsify the measurement result, it is expedient if the resistors 9 and 10 have the same temperature coefficient.
Figur 2 zeigt die beschriebene Grundschaltung in etwas abgewandelterFigure 2 shows the basic circuit described in a slightly modified
Form, wobei jedoch das Prinzip der Erfassung des Spannungssignals und die dazu verwendeten Bauelemente dieselben sind. Dieses wird deutlich durch die Verwendung gleicher Bezugszeichen für gleicheForm, but the principle of detection of the voltage signal and the components used for this are the same. This becomes clear through the use of the same reference symbols for the same
Bauelemente. Zusätzlich ist in dieser Figur eine Diode 12 zwischen der Basis des Transistors 8 und der Batteriespannung UB geschaltet, die dafür sorgt, daß die Basis-Emitter-Strecke des Zündtransistors 8 bei hoher positiver Batteriespannung und durchgeschalteten Transistor 7 nicht durchbricht. Zusätzlich sind in dieser Schaltung noch ein Widerstand 13 mit nachgeschalteter Zenerdiode 14 zwischen Zuleitung 6 und der Basis eines Transistors 15 sowie ein weiterer Widerstand 16 vorgesehen. Der pnp-Transistor 15 ist dabei emitterseitig auf Massepotential und kollektorseitig auf die Basis des Zündtransistors 7 geschaltet. Der weitere Widerstand 16 liegt zwischen Klemme 11 und Basis des Zündtransistors 7. Diese Bauelemente sorgen dafür, daß bei hoher Kollektorspannung am Zündtransistor 7 dieser Transistor nicht vorzeitig durchbricht. Das heißt, durch die Verwendung der Zenerdiode 14 werden Spannungen über einem bestimmten Potential an der Verbindungsleitung 6 über den Widerstand 13 und die Zenerdiode 14 an die Basis des Transistors 15 weitergegeben und steuern somit diesen Transistor 15 leitend, so daß die Basis des Transistors 7 auf Massepotential gezogen wird. Diese Figur 2 ist so angeordnet, daß zur Ausgabe des Spannungssignals, welches die Brennspannung repräsentiert, der Steuersignalanschluß des Zündtransistors 7 verwendet werden kann. Hierzu muß jedoch der Widerstand 10 entsprechend dimensioniert werden, um zu vermeiden, daß der Transistor 7 vorzeitig durchbricht. Das heißt, es ist zu sichern, daß während der Brenndauer eines Zündfunkens der Spannungsabfall am Widerstand 10 niedriger ist als die Spannung, die zur Ansteuerung des Transistors 7 benötigt wird. Damit wird sichergestellt, daß ohne eine zusätzliche Signalleitung für die Überwachung der Brennspannung an der Klemme 11 zeitversetzt einmal mit einem von der nicht dargestellten Steuerschaltung ausgelösten Spannungssignals (US) der Zündtransistor 7 leitend geschaltet und zum anderen die Funkenbrenn-spannung an die an Klemme 11 anzuschließende Auswerteschaltung abgegeben werden kann. Components. In addition, a diode 12 is connected in this figure between the base of the transistor 8 and the battery voltage U B , which ensures that the base-emitter path of the ignition transistor 8 does not break down when the battery voltage is high and the transistor 7 is switched on. In addition are in this Circuit still a resistor 13 with a downstream Zener diode 14 between lead 6 and the base of a transistor 15 and a further resistor 16 are provided. The pnp transistor 15 is connected on the emitter side to ground potential and on the collector side to the base of the ignition transistor 7. The further resistor 16 is between the terminal 11 and the base of the ignition transistor 7. These components ensure that this transistor does not break down prematurely if the collector voltage at the ignition transistor 7 is high. That is, by using the Zener diode 14, voltages above a certain potential on the connecting line 6 are passed through the resistor 13 and the Zener diode 14 to the base of the transistor 15 and thus control this transistor 15 so that the base of the transistor 7 is on Ground potential is drawn. This Figure 2 is arranged so that the control signal connection of the ignition transistor 7 can be used to output the voltage signal, which represents the operating voltage. For this purpose, however, the resistor 10 must be dimensioned accordingly in order to avoid that the transistor 7 breaks prematurely. This means that it must be ensured that the voltage drop across the resistor 10 is lower than the voltage required to drive the transistor 7 during the burning duration of an ignition spark. This ensures that, without an additional signal line for monitoring the internal voltage at terminal 11, the ignition transistor 7 is switched to conductive with a voltage signal (U S ) triggered by the control circuit (not shown) and the spark voltage to the terminal 11 evaluation circuit to be connected can be delivered.
Diese beschriebenen Schaltungen zur Erfassung des auf die Primärseite transformierten Spannungssignals der Brennspannung können auch monolithisch integriert werden, wodurch sie einen geringeren Platz benötigen. These described circuits for detecting the voltage signal of the operating voltage transformed on the primary side can also be integrated monolithically, as a result of which they require less space.

Claims

Ansprüche Expectations
1. Schaltungsanordnung für Zündanlagen zur Erfassung der auf die1. Circuit arrangement for ignition systems for detecting the on the
Primärseite einer Zündspule transformierten Brennspannung an derPrimary side of an ignition coil transformed burning voltage on the
Zündkerze, dadurch gekennzeichnet, daß die auf die Primärseite (2) transformierte Brennspannung (UBRENN) die Steuerstrecke eines alsSpark plug, characterized in that the operating voltage transformed to the primary side (2) (U BRENN ) is the control path of a
Spannungswandler arbeitenden Transistors (8) mit einem WiderstandVoltage converter operating transistor (8) with a resistor
(9) in einer Emitterfolgeschaltung derart ansteuert, daß dieser mit seinem Kollektoranschluß einem Meßglied (10) einen Strom zuführt, der proportional der Brennspannung (UBRENN) ist. (9) driven in an emitter follower circuit in such a way that the collector connection supplies a measuring element (10) with a current which is proportional to the operating voltage (U BRENN ).
2. Schaltungsanordnung nach Anspruch 1, dadurch gekennzeichnet, daß als Spannungswandler ein pnp-Transistor (8) basisseitig an die Batteriespannung (UB) und emitterseitig über den Widerstand (9) an die Verbindung zwischen Primärwicklung und Zündschalter (7) angeschlossen ist. 2. Circuit arrangement according to claim 1, characterized in that a pnp transistor (8) is connected on the base side to the battery voltage (U B ) and on the emitter side via the resistor (9) as a voltage converter to the connection between the primary winding and the ignition switch (7).
3. Schaltungsanordnung nach Anspruch 1, dadurch gekennzeichnet, daß der Kollektorstrom (Ic) einem als Widerstand ausgebildeten Meßglied (10) zugeführt ist, in dem der Kollektorstrom (Ic) in ein auswertbares Spannungssignal umwandelbar ist. 3. A circuit arrangement according to claim 1, characterized in that the collector current (Ic) is supplied to a measuring element (10) designed as a resistor, in which the collector current (Ic) can be converted into an evaluable voltage signal.
4. Schaltungsanordnung nach Anspruch 2 und 3, dadurch gekennzeichnet, daß die beiden Widerstände (9) und (10) denselben Temperaturkoeffizienten haben. 4. Circuit arrangement according to claim 2 and 3, characterized in that the two resistors (9) and (10) have the same temperature coefficient.
5. Schaltungsanordnung nach Anspruch 1 bis 4, dadurch gekennzeichnet, daß eine Diode (11) zwischen der Basis des Transistors (8) und der Batteriesßannung (UB) geschaltet ist. 5. Circuit arrangement according to claim 1 to 4, characterized in that a diode (11) between the base of the transistor (8) and the battery voltage (U B ) is connected.
6. Schaltungsanordnung nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß die Steuerelektrode des Zündschalters (7) über einen Widerstand (16) mit dem Kollektor des als Spannungswandler arbeitenden Transistors (8) derart verbunden ist, daß über eine Signalleitung an Klemme (11) einerseits das Steuersignal für den Zündschalter (7) einkoppelbar und andererseits das der Brennspannung proportionale Spannungssignal auskoppelbar ist. 6. Circuit arrangement according to one of the preceding claims, characterized in that the control electrode of the ignition switch (7) is connected via a resistor (16) to the collector of the transistor (8) operating as a voltage converter in such a way that via a signal line to the terminal (11) on the one hand the control signal for the ignition switch (7) can be coupled in and on the other hand the voltage signal proportional to the operating voltage can be coupled out.
EP91919780A 1990-12-10 1991-11-16 Ignition system for internal-combustion engines Expired - Lifetime EP0561808B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4039356 1990-12-10
DE4039356A DE4039356C1 (en) 1990-12-10 1990-12-10
PCT/DE1991/000902 WO1992010673A1 (en) 1990-12-10 1991-11-16 Ignition system for internal-combustion engines

Publications (2)

Publication Number Publication Date
EP0561808A1 true EP0561808A1 (en) 1993-09-29
EP0561808B1 EP0561808B1 (en) 1996-05-22

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP91919780A Expired - Lifetime EP0561808B1 (en) 1990-12-10 1991-11-16 Ignition system for internal-combustion engines

Country Status (6)

Country Link
US (1) US5438268A (en)
EP (1) EP0561808B1 (en)
BR (1) BR9107158A (en)
DE (2) DE4039356C1 (en)
ES (1) ES2088025T3 (en)
WO (1) WO1992010673A1 (en)

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US6278278B1 (en) 1998-08-12 2001-08-21 Siemens Aktiengesellschaft Measuring and diagnostic device for an ignition system of an internal combustion engine
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Also Published As

Publication number Publication date
DE4039356C1 (en) 1992-07-16
US5438268A (en) 1995-08-01
EP0561808B1 (en) 1996-05-22
DE59107848D1 (en) 1996-06-27
ES2088025T3 (en) 1996-08-01
WO1992010673A1 (en) 1992-06-25
BR9107158A (en) 1993-11-03

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