EP0444043B1 - Final ignition stage of a transistor ignition installation - Google Patents
Final ignition stage of a transistor ignition installation Download PDFInfo
- Publication number
- EP0444043B1 EP0444043B1 EP89908688A EP89908688A EP0444043B1 EP 0444043 B1 EP0444043 B1 EP 0444043B1 EP 89908688 A EP89908688 A EP 89908688A EP 89908688 A EP89908688 A EP 89908688A EP 0444043 B1 EP0444043 B1 EP 0444043B1
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- EP
- European Patent Office
- Prior art keywords
- transistor
- current
- ignition
- base
- emitter
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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
- F02P3/00—Other installations
- F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
- F02P3/04—Layout of circuits
- F02P3/05—Layout of circuits for control of the magnitude of the current in the ignition coil
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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
- F02P3/00—Other installations
- F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
- F02P3/04—Layout of circuits
- F02P3/05—Layout of circuits for control of the magnitude of the current in the ignition coil
- F02P3/051—Opening or closing the primary coil circuit with semiconductor devices
Definitions
- the invention relates to an ignition output stage of a transistor ignition system (TZ system).
- TZ system transistor ignition system
- EP-A-0 307 325 is not prepublished prior art according to Article 54 (3) EPC and shows an ignition control circuit which contains a current sensor resistor R 1 in the ignition coil primary circuit and thus provides a measured value which is compared in a comparator with a reference value. When the reference value is exceeded, a primary current limitation is activated.
- WO-A-8 903 937 is also not a prepublished state of the art according to Article 54 (3) EPC and describes an ignition device for an internal combustion engine, the ignition output stage containing a pnp-Darlington transistor and to be integrated as monolithically as possible. In order to avoid uncontrolled switching on of the output stage, a decoupling means is connected in the control line of the ignition output stage.
- EP-A 0 359 851 (cf. Article 54 (3) EPC), which is also not prepublished, describes an ignition device with a transistor for controlling the primary current in the ignition coil, a circuit for detecting the primary current being provided which has a voltage corresponding to the primary current to a comparator.
- the comparator compares the reference voltage with the measured voltage and, based on the comparator output, the base voltage for the transistor for switching the primary current is kept at a constant value.
- the integrated active current regulator can be omitted.
- the function of this current regulator is essentially replaced by the use of a simple control transistor without an additional voltage supply.
- This transistor comes into the active area when the current limit is set and partially dissipates the base current flowing into the Darlington transistor to ground.
- the circuit thus serves to limit the primary coil current and can also be used as a single current limitation or as short-circuit protection will.
- the subclaims have advantageous developments of the subject matter according to the main claim. In particular, specific circuits are claimed with which the control of the control transistor is improved and the influence of control voltage tolerances is reduced.
- the coil primary current flows in the collector-emitter circuit of a Darlington transistor DT for an ignition coil ZS of a transistor ignition system 1 that is known per se and not shown in detail.
- the Darlington transistor DT is connected via its base and a base line 2 in accordance with the switching state of a Transistor T driven.
- the control takes place with the help of a control voltage U V and a series resistor R V.
- a control transistor T1 With its collector-emitter circuit.
- a divider circuit consisting of resistors R1 and R2 between the base line 2 and ground. From the center tap of this divider circuit, a line 3 leads to the base of the regulating transistor T 1, a diode D being arranged in the line 3.
- the circuit according to FIG. 1 has the following function:
- the base voltage present at the Darlington transistor DT is an indirect representation of the current flowing in the collector-emitter circuit.
- the pending base-emitter voltage at its base when the Darlington transistor is switched on is divided by the divider resistors R 1, R 2 to the level of two diode forward voltages. With this voltage, the control transistor T1 is driven. The control transistor T1 derives part of the base current for the Darlington transistor from ground. As a result, the Darlington transistor is operated in the active region and the coil primary current I SP is regulated. The collector current or coil primary current is a function of the base-emitter voltage. This achieves a limitation of the primary coil current and, at the same time, a limitation of the stored ignition energy. As a single current limitation, the circuit also serves as short-circuit protection.
- FIG. 2 shows a time diagram for the course of the coil primary current in the upper part and for the course of the base-emitter voltage of the Darlington transistor DT in the lower part.
- the rise times (arrow 3) are about three to five ms.
- the current limitation has already become active in that the control transistor T 1 has come into the active area and partially derives the base current flowing in the Darlington transistor DT against ground.
- FIG. 3 shows the circuit of a second embodiment of the invention.
- a Darlington transistor DT is used, in whose emitter line there is a current sensor resistor R f and in whose collector-emitter circuit there is an ignition coil ZS.
- the control of the Darlington transistor DT also takes place via a base line 2 corresponding to the switching state of a control transistor T.
- a divider circuit comprising resistors R4 and R5 is also arranged here, as is the control transistor T1.
- the base of the control transistor T1 is connected via a line 4 to the center tap aer divider circuit.
- this circuit according to FIG. 2 essentially corresponds to the circuit according to FIG. 1.
- resistor R3 in the base line 2 is attached between the branches to the control transistor T1 and the divider circuit comprising the resistors R4 and R5.
- FIG. 5 shows the circuit of a third embodiment of the invention.
- a Darlington transistor DT is contained in the circuit of the ignition coil ZS and a current sensor resistor R f is located in its emitter line.
- the control of the Darlington transistor DT also takes place here via the base line 2 in accordance with the preceding circuits, with a resistor R6 in the base line 2 between the branch of the regulating transistor T1 and the branch of the divider circuit R7, R8 and R9), which is the resistor R3 from the circuit according to FIG. 3.
- the control transistor T1 lies here between the base line 2 and ground.
- the control of the control transistor T1 is carried out here in such a way that a line 5 leads to the base of a second transistor T2 from the emitter line of the Darlington transistor in front of the current sensor resistor R f .
- the collector-emitter circuit of this second transistor T2 is between a divider circuit comprising resistors R7, R8 and R9 and ground.
- This divider circuit comprising the resistors R7, R8 and R9 is also arranged between the base line 2 and ground.
- the base of the control transistor T1 is driven via a branch from the divider circuit (R7, R8 and R9).
- the circuit according to the third embodiment has the following function:
- the control voltage for the second transistor T2 is an image of the coil primary current I SP on the sensor resistor R f .
- the transistor T2 transmits the shifted voltage across the current sensor resistor R f to the control transistor T1 via the divider R8 / R9. This gives a direct reaction of the coil primary current I SP via the current sensor resistor R f and the transistor T2 to the control transistor T1 in this circuit.
- the advantage of this circuit is that the sensor resistance R f in favor of a low collector-ground saturation voltage of the Darlington transistor DT can be dimensioned very low, because the control voltage for the transistor T2 can be less than a base-emitter threshold.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
Description
Die Erfindung betrifft eine Zündendstufe einer Transistor-zündanlage (TZ-Anlage).The invention relates to an ignition output stage of a transistor ignition system (TZ system).
Es ist bekannt, Zündendstufen von Transistor-Zündanlagen mit einem Darlington-Transistor zu steuern, in dessen Kollektor-Emitterkreis der Spulenprimärstrom der Zündspule fließt. Für eine notwendige Begrenzung des Spulenprimärstroms und damit gleichzeitig eine Begrenzung der gespeicherten Zündenergie ist der Einsatz eines aktiven Stromreglers bekannt, der in einem integrierten Schaltkreis enthalten und im Hybridverband eingebaut ist. Ein solcher integrierter aktiver Stromregler ist relativ aufwendig und teuer.It is known to control ignition output stages of transistor ignition systems with a Darlington transistor in whose collector-emitter circuit the coil primary current of the ignition coil flows. For a necessary limitation of the primary coil current and thus at the same time a limitation of the stored ignition energy, the use of an active current regulator is known, which is contained in an integrated circuit and is installed in the hybrid network. Such an integrated active current regulator is relatively complex and expensive.
Die EP-A-0 307 325 ist nicht vorveröffentlichter Stand der Technik gemäß Artikel 54(3) EPÜ und zeigt einen Zündsteuerschaltkreis, welcher im Zündspulenprimärstromkreis einen Strommeßfühlerwiderstand R₁ enthält und so einen Meßwert liefert, der in einem Komparator mit einem Referenzwert verglichen wird. Beim Überschreiten des Referenzwertes wird eine Primärstrombegrenzung aktiviert.EP-A-0 307 325 is not prepublished prior art according to Article 54 (3) EPC and shows an ignition control circuit which contains a current
Die WO-A-8 903 937 ist ebenfalls nicht vorveröffentlichter Stand der Technik gemäß Artikel 54(3) EPÜ und beschreibt eine Zündeinrichtung für eine Brennkraftmaschine, wobei die Zündendstufe einen pnp-Darlington-Transistor enthält und möglichst monolithisch integrierbar sein soll. Zur Vermeidung des unkontrollierten Einschaltens der Endstufe ist in die Ansteuerleitung der Zündendstufe ein Entkoppelmittel geschaltet.WO-A-8 903 937 is also not a prepublished state of the art according to Article 54 (3) EPC and describes an ignition device for an internal combustion engine, the ignition output stage containing a pnp-Darlington transistor and to be integrated as monolithically as possible. In order to avoid uncontrolled switching on of the output stage, a decoupling means is connected in the control line of the ignition output stage.
Die ebenfalls nicht vorveröffentlichte EP-A 0 359 851 (vgl. Artikel 54(3) EPÜ) beschreibt ein Zündgerät mit einem Transistor zum Steuern des Primärstromes in der Zündspule, wobei ein Schaltkreis zur Erfassung des Primärstromes vorgesehen ist, welcher eine dem Primärstrom entsprechende Spannung einem Komparator zuführt. Der Komparator vergleicht die Referenzspannung mit der gemessenen Spannung und anhand des Komparatorausgangs wird die Basisspannung für den Transistors zum Schalten des Primärstroms auf einem konstanten Wert gehalten.EP-A 0 359 851 (cf. Article 54 (3) EPC), which is also not prepublished, describes an ignition device with a transistor for controlling the primary current in the ignition coil, a circuit for detecting the primary current being provided which has a voltage corresponding to the primary current to a comparator. The comparator compares the reference voltage with the measured voltage and, based on the comparator output, the base voltage for the transistor for switching the primary current is kept at a constant value.
Bei einer Zündendstufe einer Transistor-Zündanlage mit den Merkmalen des Anspruchs 1 kann der integrierte aktive Stromregler entfallen. Die Funktion dieses Stromreglers wird im wesentlichen durch den Einsatz eines einfachen Regeltransistors ohne zusätzliche Spannungsversorgung ersetzt. Dieser Transistor kommt beim Einsetzen der Strombegrenzung in den aktiven Bereich und leitet den in den Darlington-Transistor fließenden Basisstrom teilweise gegen Masse ab. Die Schaltung dient somit zur Begrenzung des Spulenprimärstroms und kann als Einfachstrombegrenzung aber auch als Kurzschlußschutz eingesetzt werden. Die Unteransprüche haben vorteilhafte Weiterbildungen des Gegenstandes nach dem Hauptanspruch zum Inhalt. Insbesondere werden konkrete Schaltungen beansprucht, mit denen die Ansteuerung des Regeltransistors verbessert wird und der Einfluß von Ansteuerspannungstoleranzen verringert wird.In the case of an ignition output stage of a transistor ignition system with the features of
Ausführungsbeispiele der Erfindung werden in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert.Embodiments of the invention are shown in the drawing and explained in more detail in the following description.
Es zeigen:
Figur 1- die Schaltung einer ersten Ausfühiungsform der Erfindung,
Figur 2- ein Zeitdiagramm zum Einsatz der Strombegrenzung, das den Verlauf des Spulenprimärstroms und die Basis-Emitterspannung zeigt,
Figur 3- die Schaltung einer zweiten Ausführungsform der Erfindung,
- Figur 4
- ein Kennliniendiagramm, das die mit der zweiten Ausführungsform erreichte Verbesserung gegenüber der ersten Ausführungsform zeigt,
Figur 5- eine Schaltung einer dritten Ausfühungsform.
- Figure 1
- the circuit of a first embodiment of the invention,
- Figure 2
- 1 shows a time diagram for the use of the current limitation, which shows the course of the coil primary current and the base-emitter voltage,
- Figure 3
- the circuit of a second embodiment of the invention,
- Figure 4
- 2 is a characteristic diagram showing the improvement achieved with the second embodiment over the first embodiment;
- Figure 5
- a circuit of a third embodiment.
In der Schaltung nach Figur 1 fließt im Kollektor-Emitterkreis eines Darlington-Transistors DT der Spulenprimärstrom für eine an sich bekannte und nicht weiter dargestellte Zündspule ZS einer Transistorzündanlage 1. Der Darlington-Transistor DT wird über seine Basis und eine Basisleitung 2 entsprechend dem Schaltzustand eines Transistors T angesteuert. Die Ansteuerung erfolgt mit Hilfe einer Ansteuerspannung UV und eines Vorwiderstandes RV.In the circuit according to FIG. 1, the coil primary current flows in the collector-emitter circuit of a Darlington transistor DT for an ignition coil ZS of a
Zwischen der Basisleitung 2 zum Darlington-Transistor DT und Masse liegt ein Regeltransistor T₁ mit seinem Kollektor-Emitterkreis. Weiter liegt zwischen der Basisleitung 2 und Masse eine Teilerschaltung aus Widerständen R₁ und R₂. Vom Mittelabgriff dieser Teilerschaltung führt eine Leitung 3 zur Basis des Regeltransistors T₁, wobei in der Leitung 3 eine Diode D angeordnet ist.Between the
Die Schaltung nach Figur 1 hat folgende Funktion: Die am Darlington-Transistor DT anstehende Basisspannung ist eine indirekte Wiedergabe des im Kollektor-Emitterkreises fließenden Stromes. Durch Regelung dieser Basisspannung durch den Regel-transistor T₁ wird somit eine indirekte Regelung des Kollektorstroms bzw. des Spulenprimärstromes ISP erreicht.The circuit according to FIG. 1 has the following function: The base voltage present at the Darlington transistor DT is an indirect representation of the current flowing in the collector-emitter circuit. By regulating this base voltage by means of the regulating
Die im eingeschalteten Zustand des Darlington-Transistors an seiner Basis anstehende Basis-Emitterspannung wird durch die Teilerwiderstände R₁, R₂ auf das Niveau von zwei Diodenflußspannungen geteilt. Mit dieser Spannung wird der Regeltransistor T₁ angesteuert. Der Regeltransistor T₁ leitet einen Teil des Basisstroms für den Darlington-Transistor nach Masse ab. Dadurch wird der Darlington-Transistor im aktiven Bereich betrieben und der Spulenprimärstrom ISP wird geregelt. Der Kollektorstrom bzw. Spulenprimärstrom ist eine Funktion der Basis-Emitterspannung. Damit wird eine Begrenzung des Spulenprimärstroms und gleichzeitig eine Begrenzung der gespeicherten Zündenergie erreicht. Als Einfachstrombegrenzung dient die Schaltung auch als Kurzschlußschutz.The pending base-emitter voltage at its base when the Darlington transistor is switched on is divided by the
Verbessert wird die Wirkungsweise dieser Einfach-Regelung durch zusätzliches Einfügen eines Stromfühlerwiderstandes Rf in die Emitterleitung des Darlington-Transistors DT. Dadurch ist die erfaßte Basisspannung eine Summe aus der Basis-Emitterspannung des Darlington-Transistors DT und der dem Kollektorstrom proportionalen Spannung am Fühlerwiderstand Rf. Eine direkte Wirkung des Fühlerwiderstandes auf den Regel-transistor T₁ besteht aber hier (im Gegensatz zum dritten Ausführungsbeispiel) nicht.The operation of this simple control is improved by additionally inserting a current sensor resistor R f into the emitter line of the Darlington transistor DT. As a result, the detected base voltage is a sum of the base-emitter voltage of the Darlington transistor DT and the voltage across the sensor resistor R f proportional to the collector current. A direct effect of the sensor resistance on the control transistor But T₁ does not exist here (in contrast to the third embodiment).
In Figur 2 ist im oberen Teil ein Zeitdiagramm für den Verlauf des Spulenprimärstroms und im unteren Teil für den Verlauf der Basis-Emitterspannung des Darlington-Transistors DT wiedergegeben. Die Anstiegszeiten (Pfeil 3) betragen etwa drei bis fünf ms. Im strichliert gezeichneten Bereich ist die Strombegrenzung bereits dadurch aktiv geworden, daß der Regel-transistor T₁ in den aktiven Bereich gekommen ist und den in den Darlington-Transistor DT fließenden Basisstrom teilweise gegen Masse ableitet.FIG. 2 shows a time diagram for the course of the coil primary current in the upper part and for the course of the base-emitter voltage of the Darlington transistor DT in the lower part. The rise times (arrow 3) are about three to five ms. In the area shown in dashed lines, the current limitation has already become active in that the
In Figur 3 ist die Schaltung einer zweiten Ausführungsform der Erfindung dargestellt. Auch hier ist wieder ein Darlington-Transistor DT verwendet, in dessen Emitterleitung ein Stromfühlerwiderstand Rf liegt und in dessen Kollektor-Emitterkreis eine Zündspule ZS liegt. Die Ansteuerung des Darlington-Transistors DT erfolgt ebenfalls über eine Basisleitung 2 entsprechend dem Schaltzustand eines Steuertransistors T. Zwischen der Basisleitung 2 und Masse ist auch hier eine Teilerschaltung aus Widerständen R₄ und R₅ angeordnet ebenso wie der Regeltransistor T₁. Die Basis des Regeltransistors T₁ ist über eine Leitung 4 mit dem Mittelabgriff aer Teilerschaltung verbunden. Insoweit entspricht diese Schaltung nach Figur 2 im wesentlichen der Schaltung nach Figur 1.FIG. 3 shows the circuit of a second embodiment of the invention. Here again, a Darlington transistor DT is used, in whose emitter line there is a current sensor resistor R f and in whose collector-emitter circuit there is an ignition coil ZS. The control of the Darlington transistor DT also takes place via a
Zusätzlich ist aber hier ein Widerstand R₃ in der Basisleitung 2 zwischen den Abzweigungen zum Regeltransistor T₁ und der Teilerschaltung aus den Widerständen R₄ und R₅ angebracht.In addition, here a resistor R₃ in the
Die Funktion dieser zweiten Ausführungsform wird in Verbindung mit dem Diagramm nach Figur 4 näher läutert: Hier wird die Beeinflussung der Kollektorstrombegrenzung des Darlington-Transistors DT durch Ansteuerspannungstoleranzen von UV und Widerstandstoleranzen von RV durch das Einfügen des Widerstandes R₃ vermindert, was bei einer entsprechenden Dimensionierung der Stromverstärkung des Regeltransistors T₁ und des Widerstandes R₃ zu erreichen ist. Die Wirkungsweise der Schaltung ist aus den Kennlinien der Figur 4 ersichtlich. Der Arbeitspunkt des Darlington-Transistors bei der Schaltung des zweiten Ausführungsbeispiels ist durch x gekennzeichnet und zum besseren Verständnis in Richtung eines kleineren Ubx verschoben. Versetzt dazu sind die Arbeitspunkte, die sich bei der ersten Schaltung (Figur 1) je nach Ansteuerspannungs- und Vorwiderstandstoleranz (UV und RV) ergeben mit a₁ bis a₃ eingezeichnet. Aus der Darstellung der Figur 4 ist zu erkennen, daß die Beeinflussung der Kollektorstrombegrenzung durch das Einbringen des Widerstandes R₃ abnimmt.The function of this second embodiment is explained in more detail in connection with the diagram according to FIG. 4: Here, the influence on the collector current limitation of the Darlington transistor DT by control voltage tolerances of U V and resistance tolerances of R V is reduced by inserting the
In Figur 5 ist die Schaltung einer dritten Ausführungsform der Erfindung dargestellt. Auch hier ist wieder ein Darlington-Transistor DT im Kreis der Zündspule ZS enthalten und in seiner Emitterleitung liegt ein Stromfühlerwiderstand Rf. Die Ansteuerung des Darlington-Transistors DT erfolgt auch hier über die Basisleitung 2 entsprechend den vorhergehenden Schaltungen, wobei in der Basisleitung 2 zwischen der Abzweigung des Regeltransistors T₁ und der Abzweigung der Teilerschaltung R₇, R₈ und R₉) ein Widerstand R₆ liegt, der dem Widerstand R₃ aus der Schaltung nach Figur 3 entspricht. Der Regel-transistor T₁ lieqt auch hier zwischen der Basisleitung 2 und Masse.5 shows the circuit of a third embodiment of the invention. Here again, a Darlington transistor DT is contained in the circuit of the ignition coil ZS and a current sensor resistor R f is located in its emitter line. The control of the Darlington transistor DT also takes place here via the
Die Ansteuerung des Regeltransistors T₁ ist aber hier in der Weise ausgeführt, daß von der Emitterleitung des Darlington-Transistors vor dem Stromfühlerwiderstand Rf eine Leitung 5 zur Basis eines zweiten Transistors T₂ führt. Der Kollektor-Emitterkreis dieses zweiten Transistors T₂ liegt zwischen einer Teilerschaltung aus Widerständen R₇, R₈ und R₉ und Masse. Diese Teilerschaltung aus den Widerständen R₇, R₈ und R₉ ist ebenfalls zwischen der Basisleitung 2 und Masse angeordnet. Die Basis des Regeltransistors T₁ wird über eine Abzweigung aus der Teilerschaltung (R₇, R₈ und R₉) angesteuert.The control of the control transistor T₁ is carried out here in such a way that a
Die Schaltung nach der dritten Ausführungsform hat folgende Funktion: Die Steuerspannung für den zweiten Transistor T₂ ist ein Abbild des Spulenprimärstroms ISP am Fühlerwiderstand Rf. Der Transistor T₂ überträgt die verschobene Spannung über dem Stromfühlerwiderstand Rf auf den Regeltransistor T₁ über den Teiler R₈/R₉. Damit ist bei dieser Schaltung eine direkte Rückwirkung des Spulenprimärstromes ISP über den Stromfühler-widerstand Rf und den Transistor T₂ auf den Regeltransistor T₁ gegeben. Der Vorteil dieser Schaltung ist, daß der Fühlerwiderstand Rf zugunsten einer niedrigen Kollektor-Masse-Sättigungsspannung des Darlington-Transistors DT sehr niederohmig dimensioniert werden kann, weil die Steuerspannung für den Transistor T₂ kleiner als eine Basis-Emitter-Schwelle sein kann.The circuit according to the third embodiment has the following function: The control voltage for the second transistor T₂ is an image of the coil primary current I SP on the sensor resistor R f . The transistor T₂ transmits the shifted voltage across the current sensor resistor R f to the control transistor T₁ via the divider R₈ / R₉. This gives a direct reaction of the coil primary current I SP via the current sensor resistor R f and the transistor T₂ to the control transistor T₁ in this circuit. The advantage of this circuit is that the sensor resistance R f in favor of a low collector-ground saturation voltage of the Darlington transistor DT can be dimensioned very low, because the control voltage for the transistor T₂ can be less than a base-emitter threshold.
Claims (4)
- Ignition output stage of a transistorized ignition system (TI system) having a Darlington transistor (DT), in the collector-emitter sector of which the primary coil current (ISP) of an ignition coil (ZS) flows and which is controlled via a baseline (2) leading to its base, and having a device for limiting the primary coil current (ISP) comprising a regulating transistor (T₁) which is located with its collector-emitter circuit between the baseline (2) and earth and is actuated in accordance with the size of the primary coil current (ISP), having a divider circuit consisting of resistors (R₁/R₂; R₄/R₅; R₇+R₈/R₉) between the baseline (2) and earth parallel to the collector-emitter circuit of the regulating transistor (T₁), the centre tap of the divider circuit consisting of resistors (R₁/R₂; R₄/R₅; R₇+R₈/R₉) being connected to the base of the regulating transistor (T₁) for actuating the regulating transistor (T₁), and the regulating transistor (T₁) going into the active region when the current limitation for the primary coil current (ISP) begins and at the same time partially conducting away to earth the base current (Ib) flowing into the Darlington transistor (DT) via the baseline.
- Ignition output stage according to Claim 1, characterized in that a current sensor resistor (Rf) is arranged in the emitter line of the Darlington transistor (DT).
- Ignition output stage according to Claims 1 and 2, characterized in that between the branch of the regulating transistor (T₁) and of the divider circuit of the resistors (R₁/R₂; R₄/R₅; R₇+R₈/R₉) in the baseline (2) a resistor (R₃; R₆) is arranged for reducing the influencing of the regulation or reducing the influencing of the limitation of the primary coil current (ISP) by drive tolerances (UV) and series resistance tolerances (RV).
- Ignition output stage according to Claim 3, characterized in that a tap between the emitter of the Darlington transistor (DT) and the current sensor resistor (Rf) leads via line (5) to the base of a second transistor (T₂), the control voltage present here being an image of the primary coil current (ISP) at the sensor resistor (Rf), in that a resistor (R₇+R₈) of the component resistor consists of two resistors and the centre tap of this component resistor (R₇/R₈) formed in this way is connected to the collector of the second transistor (T₂) which is connected on the emitter side to earth.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3839039A DE3839039A1 (en) | 1988-11-18 | 1988-11-18 | IGNITION STAGE OF A TRANSISTOR IGNITION SYSTEM |
| DE3839039 | 1988-11-18 | ||
| PCT/DE1989/000516 WO1990005848A1 (en) | 1988-11-18 | 1989-08-05 | Final ignition stage of a transistor ignition installation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0444043A1 EP0444043A1 (en) | 1991-09-04 |
| EP0444043B1 true EP0444043B1 (en) | 1996-03-27 |
Family
ID=6367435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP89908688A Expired - Lifetime EP0444043B1 (en) | 1988-11-18 | 1989-08-05 | Final ignition stage of a transistor ignition installation |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5107392A (en) |
| EP (1) | EP0444043B1 (en) |
| KR (1) | KR970011036B1 (en) |
| DE (2) | DE3839039A1 (en) |
| WO (1) | WO1990005848A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19533637A1 (en) * | 1995-09-12 | 1997-03-13 | Bosch Gmbh Robert | Ignition stage |
| DE19711204C2 (en) * | 1997-03-18 | 1999-01-14 | Bosch Gmbh Robert | Circuit arrangement of an ignition output stage |
| FR2932229B1 (en) * | 2008-06-05 | 2011-06-24 | Renault Sas | CONTROL OF THE POWER SUPPLY OF AN IGNITION CANDLE OF AN INTERNAL COMBUSTION ENGINE |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0307325A1 (en) * | 1987-08-27 | 1989-03-15 | STMicroelectronics S.A. | Ignition control circuit |
| EP0359851A1 (en) * | 1988-09-21 | 1990-03-28 | Mitsubishi Denki Kabushiki Kaisha | Ignition device for internal combustion engine |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3340861A (en) * | 1964-09-16 | 1967-09-12 | Rca Corp | Transistorized ignition circuit |
| JPS51106838A (en) * | 1975-03-14 | 1976-09-22 | Nippon Denso Co | |
| DE2649733A1 (en) * | 1976-10-29 | 1978-05-03 | Bosch Gmbh Robert | IC engine ignition with engine dependent signal generator - has additional capacitor whose charge is variable via emitter-collector paths of input and output transistors |
| JPS5819850B2 (en) * | 1977-09-30 | 1983-04-20 | 株式会社日立製作所 | Non-contact ignition device for internal combustion engine |
| DE2948645A1 (en) * | 1979-12-04 | 1981-06-11 | Robert Bosch Gmbh, 7000 Stuttgart | IGNITION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE |
| DE3735631A1 (en) * | 1987-10-21 | 1989-05-03 | Bosch Gmbh Robert | IGNITION DEVICE FOR A COMBUSTION ENGINE |
-
1988
- 1988-11-18 DE DE3839039A patent/DE3839039A1/en not_active Ceased
-
1989
- 1989-08-05 WO PCT/DE1989/000516 patent/WO1990005848A1/en active IP Right Grant
- 1989-08-05 DE DE58909637T patent/DE58909637D1/en not_active Expired - Fee Related
- 1989-08-05 US US07/671,894 patent/US5107392A/en not_active Expired - Fee Related
- 1989-08-05 EP EP89908688A patent/EP0444043B1/en not_active Expired - Lifetime
- 1989-08-05 KR KR1019900701490A patent/KR970011036B1/en not_active IP Right Cessation
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0307325A1 (en) * | 1987-08-27 | 1989-03-15 | STMicroelectronics S.A. | Ignition control circuit |
| EP0359851A1 (en) * | 1988-09-21 | 1990-03-28 | Mitsubishi Denki Kabushiki Kaisha | Ignition device for internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0444043A1 (en) | 1991-09-04 |
| KR900702227A (en) | 1990-12-06 |
| DE3839039A1 (en) | 1990-05-23 |
| WO1990005848A1 (en) | 1990-05-31 |
| DE58909637D1 (en) | 1996-05-02 |
| US5107392A (en) | 1992-04-21 |
| KR970011036B1 (en) | 1997-07-05 |
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