EP0632199A2 - Method to control an ignition coil - Google Patents
Method to control an ignition coil Download PDFInfo
- Publication number
- EP0632199A2 EP0632199A2 EP94110260A EP94110260A EP0632199A2 EP 0632199 A2 EP0632199 A2 EP 0632199A2 EP 94110260 A EP94110260 A EP 94110260A EP 94110260 A EP94110260 A EP 94110260A EP 0632199 A2 EP0632199 A2 EP 0632199A2
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- EP
- European Patent Office
- Prior art keywords
- ignition
- pulse
- coil
- current
- additional control
- 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.)
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Classifications
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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
- F02P15/00—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits
- F02P15/12—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits having means for strengthening spark during starting
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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
- F02P3/045—Layout of circuits for control of the dwell or anti dwell time
- F02P3/0453—Opening or closing the primary coil circuit with semiconductor devices
- F02P3/0456—Opening or closing the primary coil circuit with semiconductor devices using digital techniques
Definitions
- the invention relates to a method for controlling an ignition coil according to the preamble of claim 1 and a circuit for performing the method.
- Electronic ignition systems generally consist of a control unit, an ignition output stage and the ignition coil with spark plug.
- the control unit transmits to the ignition output stage whether it should load or ignite the ignition coil.
- the ignition output stage charges the ignition coil up to a predetermined ignition current and keeps it constant until the ignition request, after which the ignition coil discharges via the spark plug.
- the ignition current and burning time are very large. Since such a large ignition energy is not necessary when the engine is warmed up, the life of spark plugs is reduced.
- the ignition output stage required for a variable ignition current is usually controlled via voltage coding of the control signal.
- the voltage coding has the disadvantage that the information is incorrectly evaluated in the event of a voltage drop between the control unit and the ignition output stage.
- the control unit has to be more complex (with an analog output).
- the invention has for its object to design a method for controlling an ignition coil according to the preamble of claim 1 so that the control signals are safely transmitted without additional effort on lines and the ignition energy is adjustable according to the control signal.
- the invention which works with purely digital levels, takes advantage of the fact that the signals which relate to the normal ignition sequence (charge and ignition) do not fall below certain time ranges. So z. B. the minimum loading time for ignition coils at high speeds at about 3 ms.
- the control signal in the control unit is supplemented by another pulse right at the beginning of the loading time of the ignition coil.
- a short extra signal E is produced which is intended to transmit the information "increase ignition current".
- the ignition output stage can register this pulse and, if present, provide the appropriate ignition energy.
- the falling edge of pulse E is suppressed, since E with a duration of approx. 0.1 ms does not in itself represent an ignition request.
- a larger ignition energy such as is required for the cold start, is provided in the form of an ignition current increase.
- Fig. 2 three ignition cycles with their control signals N1, N2, E and N3 are shown.
- the first two control signals N1 and N2 request a normal ignition current, the ignition current is to be increased in the third cycle.
- the ignition output stage 2 is informed of an increase in the ignition current by analyzing the control signal St at the beginning of the loading process (FIG. 2, third cycle). The ignition output stage then limits the ignition current for a cycle only from a higher threshold, the increased ignition current. From this maximum, the coil current is limited.
- Fig. 5 shows the current through the ignition coil. At the beginning of each cycle, the current increases until the desired ignition current is reached. The ignition output stage then keeps the current constant until the ignition occurs.
- the monoflop 5 together with the OR circuit 6, covers the pulse E and thus forms the signal SL "load coil”. If a pulse E occurs in the control signal St within the 0.7 ms of the monoflop (AND circuit 7), the flip-flop 8 is set for the charging time and indicates at its output that the ignition current should be increased. The flip-flop 8 is reset after the ignition ("coil loaded” becomes "low”).
- the power transistor TR which controls the ignition coil 3 is implemented in this case as a "sense FET".
- a small sensor current proportional to the ignition coil current can be tapped at its additional output.
- This sensor current is compared via the resistors R1 and OP1 with a reference current I ref in order to recognize whether the ignition current has already been reached.
- the reference current "I ref small” (I ref1 ) or "I ref large” (I ref1 + I ref2 ) can be switched via a semiconductor switch S1 .
- S1 is driven by the flip-flop in FIG. 6. When the switch is closed, the pilot current is increased.
- R2, C and OP2 form an inverting integrator.
- the output voltage of OP2 is slowly increased or decreased, depending on the comparator OP1 indicating that the desired ignition current has been exceeded or fallen below. If the ignition coil is to be charged, the switch S2 is in the position shown: the output of the integrator OP2 is switched to the power transistor via the voltage follower OP3.
- the input of the voltage follower is pulled to ground via the switch S2 (the OR gate from FIG. 6 controls the semiconductor switch S2).
- the power transistor then interrupts the ignition coil current on the primary side and a spark is triggered in the spark plug on the secondary side of the ignition coil.
- the previous example referred to a one-step, discrete increase in the ignition energy by increasing the coil current by a constant amount.
- the maximum coil current and thus the ignition energy can also be controlled in several smaller stages depending on the requirements by the load and temperature of the engine.
- a variable advance of the additional control pulse E compared to the normal ignition pulse N3 is generated in the control device 1 and is recovered and decoded by the ignition output stage 2 from the control signal St.
- the time interval between the two signals E, N3 is measured by a clock generator in that the pulses generated by it reach a counter via a gate circuit.
- the counter content is then proportional to the increase in the coil current St.
- the signal "Increase ignition current” ZE then does not consist of a single pulse, but of one of the sequence of the counting pulses passed by the gate circuit.
- a time signal proportional to this can also be obtained from this signal, as a result of which the burning time of the spark plug is finally controlled in accordance with the required ignition energy. This is done by short-circuiting the primary side of the ignition coil 3, the energy stored in the ignition coil being dissipated in a resistor via a free-wheeling diode.
- the burning time and / or the maximum size of the ignition current can also be determined by the width of the additional control pulse E.
- the determination of the width of the transmitted pulse takes place again in the ignition output stage analogously to the procedure discussed above. It is therefore also contemplated to increase the duration of the candle together with the maximum size of the ignition current when the ignition energy is increased.
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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 ein Verfahren zum Ansteuern einer Zündspule nach dem Oberbegriff des Anspruchs 1 und eine Schaltung zur Durchführung des Verfahrens.The invention relates to a method for controlling an ignition coil according to the preamble of
Elektronische Zündsysteme bestehen im allgemeinen aus einem Steuergerät, einer Zündendstufe und der Zündspule mit Zündkerze. Das Steuergerät übermittelt der Zündendstufe, ob sie die Zündspule beladen oder zünden soll. Die Zündendstufe belädt die Zündspule bis zu einem vorgegebenen Zündstrom und hält ihn bis zur Zündanforderung konstant, danach entlädt sich die Zündspule über die Zündkerze. Zur Verbesserung des Kaltstartverhaltens sind Zündstrom und Brenndauer (Zündenergie) sehr groß gewählt. Da eine so große Zündenergie beim warmgelaufenen Motor nicht notwendig ist, verringert sich die Lebensdauer von Zündkerzen.Electronic ignition systems generally consist of a control unit, an ignition output stage and the ignition coil with spark plug. The control unit transmits to the ignition output stage whether it should load or ignite the ignition coil. The ignition output stage charges the ignition coil up to a predetermined ignition current and keeps it constant until the ignition request, after which the ignition coil discharges via the spark plug. To improve the cold start behavior, the ignition current and burning time (ignition energy) are very large. Since such a large ignition energy is not necessary when the engine is warmed up, the life of spark plugs is reduced.
Zur Verlängerung der Lebensdauer von Zündkerzen ist es notwendig, die Zündenergie steuern zu können. Dies kann z. B. durch einen variablen Zündstrom, oder definiertes "Löschen" des Zündfunkens geschehen. Ein Verfahren zum Beeinflussen der Brenndauer ist aus der DE 40 38 440 A1 bekannt. Die Ansteuerung der für einen variablen Zündstrom benötigten Zündendstufe erfolgt üblicherweise über eine Spannungskodierung des Steuersignals. Die Spannungskodierung hat den Nachteil, daß die Information bei einem Spannungsabfall zwischen Steuergerät und Zündendstufe falsch ausgewertet wird. Außerdem muß das Steuergerät aufwendiger (mit analogem Ausgang) aufgebaut werden.To extend the life of spark plugs, it is necessary to be able to control the ignition energy. This can e.g. B. happen by a variable ignition current, or defined "extinguishing" the spark. A method for influencing the burning time is known from DE 40 38 440 A1. The ignition output stage required for a variable ignition current is usually controlled via voltage coding of the control signal. The voltage coding has the disadvantage that the information is incorrectly evaluated in the event of a voltage drop between the control unit and the ignition output stage. In addition, the control unit has to be more complex (with an analog output).
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zum Ansteuern einer Zündspule nach dem Oberbegriff des Anspruchs 1 so zu gestalten, daß die Ansteuersignale ohne zusätzlichen Aufwand an Leitungen sicher übertragen werden und die Zündenergie nach Maßgabe des Steuersignals einstellbar ist.The invention has for its object to design a method for controlling an ignition coil according to the preamble of
Diese Aufgabe wird mit den im kennzeichnenden Teil des Anspruchs 1 angegebenen Merkmalen gelöst. Vorteilhafte Ausgestaltungen und Weiterbildungen des Gegenstands des Anspruchs 1 sind in den Unteransprüchen angegeben.This object is achieved with the features specified in the characterizing part of
Die Erfindung, die mit rein digitalen Pegeln funktioniert, nutzt die Tatsache, daß die Signale, die den normalen Zündablauf betreffen (laden und zünden), bestimmte Zeitbereiche nicht unterschreiten. So liegt z. B. die minimale Beladezeit für Zündspulen bei hohen Drehzahlen bei ca. 3 ms.The invention, which works with purely digital levels, takes advantage of the fact that the signals which relate to the normal ignition sequence (charge and ignition) do not fall below certain time ranges. So z. B. the minimum loading time for ignition coils at high speeds at about 3 ms.
Um eine größere Zündenergie anzufordern, wird gleich zu Beginn der Beladezeit der Zündspule das Steuersignal im Steuergerät durch einen weiteren Impuls ergänzt. Es entsteht außer dem Normsignal N ein kurzes Extrasignal E, welches die Information "Zündstrom erhöhen" übermitteln soll. Die Zündendstufe kann diesen Impuls registrieren und bei Vorhandensein die entsprechende Zündenergie bereitstellen. Für die Funktion "Zünden" wird die fallende Flanke des Impulses E unterdrückt, da E mit einer Dauer von ca. 0,1 ms für sich allein keine Zündanforderung darstellt.In order to request a larger ignition energy, the control signal in the control unit is supplemented by another pulse right at the beginning of the loading time of the ignition coil. In addition to the standard signal N, a short extra signal E is produced which is intended to transmit the information "increase ignition current". The ignition output stage can register this pulse and, if present, provide the appropriate ignition energy. For the "Ignition" function, the falling edge of pulse E is suppressed, since E with a duration of approx. 0.1 ms does not in itself represent an ignition request.
Die Erfindung wird nachstehend anhand der Zeichnungen näher erläutert.The invention is explained in more detail below with reference to the drawings.
Dabei zeigt:
- Fig. 1
- das Steuergerät mit Zündendstufe, Zündspule und Zündkerze;
- Fig. 2
- drei Zündzyklen mit zugehörigen Steuersignalen;
- Fig. 3
- die Signale für die Beladung der Spule;
- Fig. 4
- das Signal für die Erhöhung des Zündstroms;
- Fig. 5
- den Stromverlauf in der Zündspule;
- Fig. 6
- die Erzeugung der Signale "Spule beladen" und "Zündstrom erhöhen" und
- Fig. 7
- das Schaltbild Ansteuerung der Zündspule.
- Fig. 1
- the control unit with ignition stage, ignition coil and spark plug;
- Fig. 2
- three ignition cycles with associated control signals;
- Fig. 3
- the signals for loading the coil;
- Fig. 4
- the signal for increasing the ignition current;
- Fig. 5
- the current profile in the ignition coil;
- Fig. 6
- the generation of the signals "load coil" and "increase ignition current" and
- Fig. 7
- the circuit diagram control of the ignition coil.
In einer bevorzugten Ausführungsform wird eine größere Zündenergie, wie sie beispielsweise für den Kaltstart benötigt wird, in Form einer Zündstromerhöhung bereitgestellt.In a preferred embodiment, a larger ignition energy, such as is required for the cold start, is provided in the form of an ignition current increase.
In Fig. 2 sind drei Zündzyklen mit ihren Steuersignalen N1, N2, E und N3 dargestellt. Die ersten beiden Steuersignale N1 und N2 fordern einen normalen Zündstrom an, im dritten Zyklus soll der Zündstrom erhöht werden.In Fig. 2 three ignition cycles with their control signals N1, N2, E and N3 are shown. The first two control signals N1 and N2 request a normal ignition current, the ignition current is to be increased in the third cycle.
Einer Zündstromerhöhung wird der Zündendstufe 2 mitgeteilt, indem das Steuersignal St zu Beginn des Beladevorgangs analysiert wird (Fig. 2, dritter Zyklus). Die Zündendstufe begrenzt darauf für einen Zyklus den Zündstrom erst ab einer höher liegenden Schwelle, dem erhöhten Zündstrom. Ab diesem Maximum wird der Spulenstrom begrenzt.The
Aus dem Steuersignal St werden in der Zündendstufe 2 zwei Signale generiert:
- a) Zum Beladen und Zünden der Spule wird der Austastimpuls herausgefiltert, so daß sich die Form eines konventionellen Steuersignals N3' ergibt (Fig. 3).
- b) Hat das
Steuergerät 1 die Forderung E nach einer Zündstromerhöhung abgesandt, kann dieZündendstufe 2 dies an dem kurzen Impuls E im Steuersignal (s. Fig. 2) erkennen. In diesem Fall wird das Signal ZE "Zündstrom erhöhen" generiert (Fig. 4).
- a) For loading and firing the coil, the blanking pulse is filtered out, so that the shape of a conventional control signal N3 'results (Fig. 3).
- b) If the
control unit 1 has sent the request E for an ignition current increase, theignition output stage 2 can recognize this from the short pulse E in the control signal (see FIG. 2). In this case, the signal ZE "increase ignition current" is generated (FIG. 4).
Fig. 5 zeigt den Strom durch die Zündspule. Mit Beginn jedes Zyklus steigt der Strom an, bis der gewünschte Zündstrom erreicht ist. Die Zündendstufe hält dann den Strom konstant, bis die Zündung erfolgt.Fig. 5 shows the current through the ignition coil. At the beginning of each cycle, the current increases until the desired ignition current is reached. The ignition output stage then keeps the current constant until the ignition occurs.
Fig. 6 zeigt eine Möglichkeit, wie sich die beiden Signale aus dem Steuersignal St gewinnen lassen. Das Monoflop 5 überdeckt zusammen mit der Oder-Schaltung 6 den Impuls E und bildet somit das Signal SL "Spule beladen". Tritt innerhalb der 0,7 ms des Monoflops ein Impuls E im Steuersignal St auf (Und-Schaltung 7), wird das Flip-Flop 8 für die Ladezeit gesetzt und zeigt an seinem Ausgang an, daß der Zündstrom erhöht werden soll. Rückgesetzt wird das Flipflop 8 nach der Zündung ("Spule beladen" wird "low").6 shows one possibility of how the two signals can be obtained from the control signal St. The monoflop 5, together with the
Fig. 7 zeigt eine mögliche Realisierung der Zündspulenansteuerung in Abhängigkeit vom Steuersignal. Der Leistungstransistor TR, der die Zündspule 3 ansteuert, ist in diesem Fall als "Sense-FET" realisiert. Dadurch kann an seinem zusätzlichen Ausgang ein dem Zündspulenstrom proportionaler kleiner Sensorstrom abgegriffen werden. Dieser Sensorstrom wird über die Widerstände R1 und OP1 mit einem Referenzstrom Iref verglichen, um zu erkennen, ob der Zündstrom bereits erreicht ist. Über einen Halbleiterschalter S1 kann der Referenzstrom "Iref klein" (Iref1) oder "Iref groß" (Iref1 + Iref2) geschaltet werden. S1 wird von dem Flip-Flop in Fig. 6 angesteuert. Wenn der Schalter geschlossen ist, wird der Zünstrom erhöht.7 shows a possible implementation of the ignition coil control as a function of the control signal. The power transistor TR, which controls the
R2, C und OP2 bilden einen invertierenden Integrator. Die Ausgangsspannung von OP2 wird langsam erniedrigt oder erhöht, je nachdem der Komparator OP1 ein über- oder Unterschreiten des gewünschten Zündstroms anzeigt. Soll die Zündspule beladen werden, befindet sich der Schalter S2 in der gezeigten Position: Der Ausgang des Integrators OP2 wird über den Spannungsfolger OP3 auf den Leistungstransistor geschaltet.R2, C and OP2 form an inverting integrator. The output voltage of OP2 is slowly increased or decreased, depending on the comparator OP1 indicating that the desired ignition current has been exceeded or fallen below. If the ignition coil is to be charged, the switch S2 is in the position shown: the output of the integrator OP2 is switched to the power transistor via the voltage follower OP3.
Zum Zünden wird der Eingang des Spannungsfolgers über den Schalter S2 auf Masse gezogen (das Oder-Gatter aus Fig. 6 steuert den Halbleiterschalter S2). Der Leistungstransistor unterbricht daraufhin den primärseitigen Zündspulenstrom und auf der Sekundärseite der Zündspule wird in der Zündkerze ein Funke ausgelöst.For ignition, the input of the voltage follower is pulled to ground via the switch S2 (the OR gate from FIG. 6 controls the semiconductor switch S2). The power transistor then interrupts the ignition coil current on the primary side and a spark is triggered in the spark plug on the secondary side of the ignition coil.
Das bisherige Beispiel bezog sich auf eine einstufige diskrete Erhöhung der Zündenergie durch eine Erhöhung des Spulenstroms um einen konstanten Betrag. Bei einer weiteren vorteilhaften Ausgestaltung der Erfindung kann der maximale Spulenstrom und damit die Zündenergie je nach Anforderung durch die Belastung und Temperatur des Motors auch in mehreren kleineren Stufen gesteuert werden. Dazu wird im Steuergerät 1 beispielsweise ein variables Voreilen des zusätzlichen Steuerimpulses E gegenüber dem normalen Zündimpuls N3 erzeugt und von der Zündendstufe 2 aus dem Steuersignal St zurückgewonnen und decodiert. Beispielsweise wird durch einen Taktgeber der zeitliche Abstand der beiden Signale E, N3 dadurch gemessen, daß die von ihm erzeugten Impulse über eine Torschaltung auf einen Zähler gelangen.The previous example referred to a one-step, discrete increase in the ignition energy by increasing the coil current by a constant amount. In a further advantageous embodiment of the invention, the maximum coil current and thus the ignition energy can also be controlled in several smaller stages depending on the requirements by the load and temperature of the engine. For this purpose, a variable advance of the additional control pulse E compared to the normal ignition pulse N3 is generated in the
Der Zählerinhalt ist dann proportional zur Erhöhung des Spulenstroms St. Das Signal "Zündstrom erhöhen" ZE besteht dann nicht aus einem einzigen Impuls, sondern aus einer der Folge der von der Torschaltung durchgelassenen Zählimpulse.The counter content is then proportional to the increase in the coil current St. The signal "Increase ignition current" ZE then does not consist of a single pulse, but of one of the sequence of the counting pulses passed by the gate circuit.
In einer weiteren Ausgestaltung der Erfindung kann aus diesem Signal auch ein dazu proportionales Zeitsignal gewonnen werden, wodurch schließlich die Brenndauer der Zündkerze entsprechend der benötigten Zündenergie gesteuert wird. Dies geschieht durch Kurzschließen der Primärseite der Zündspule 3, wobei die in der Zündspule gespeicherte Energie über eine Freilaufdiode in einem Widerstand dissipiert wird.In a further embodiment of the invention, a time signal proportional to this can also be obtained from this signal, as a result of which the burning time of the spark plug is finally controlled in accordance with the required ignition energy. This is done by short-circuiting the primary side of the
Außer durch die Voreilzeit des zusätzlichen Steuerimpulses E gegenüber dem normalen Zündimpuls kann die Brenndauer und/oder die maximale Größe des Zündstroms auch durch die Breite des zusätzlichen Steuerimpulses E bestimmt werden. Die Bestimmung der Breite des übermittelten Impulses geschieht in der Zündendstufe wieder analog zu dem oben behandelten Vorgehen. Es ist also auch daran gedacht, bei erhöhter Zündenergie die Brenndauer der Kerze mit der maximalen Größe des Zündstroms gemeinsam zu steigern.In addition to the lead time of the additional control pulse E compared to the normal ignition pulse, the burning time and / or the maximum size of the ignition current can also be determined by the width of the additional control pulse E. The determination of the width of the transmitted pulse takes place again in the ignition output stage analogously to the procedure discussed above. It is therefore also contemplated to increase the duration of the candle together with the maximum size of the ignition current when the ignition energy is increased.
Claims (8)
dadurch gekennzeichnet,
daß zur Übermittlung zusätzlicher Informationen zur Steuerung der Zündenergie zwischen Steuergerät (1) und Zündendstufe (2) in einem Zeitbereich, der für die Zündung keine Bedeutung hat, zwischen zwei Zündimpulsen (N2, N3) ein zusätzlicher Steuerimpuls (E) übertragen wird.Method for driving an ignition coil
characterized,
that an additional control pulse (E) is transmitted between two ignition pulses (N2, N3) in order to transmit additional information for controlling the ignition energy between the control unit (1) and the ignition output stage (2) in a time range which is of no importance for the ignition.
dadurch gekennzeichnet,
daß die Zündendstufe (2) den zusätzlichen Steuerimpuls (E) und den zugehörigen Zündimpuls (N3) zu einem einheitlichen Impuls (N3') umformt.Method according to claim 1,
characterized,
that the ignition output stage (2) transforms the additional control pulse (E) and the associated ignition pulse (N3) into a uniform pulse (N3 ').
dadurch gekennzeichnet,
daß durch die Übermittlung des zusätzlichen Steuerimpulses (E) die Brenndauer und/oder die Größe des Zündstroms beeinflußt werden.Method according to claim 1 or 2,
characterized,
that the burning time and / or the size of the ignition current are influenced by the transmission of the additional control pulse (E).
dadurch gekennzeichnet,
daß die maximale Größe des Zündstroms und/oder die Brenndauer durch die Voreilzeit der ansteigenden Flanke des zusätzlichen Steuerimpulses (E) gegenüber dem normalen Zündimpuls (N3) bestimmt wird.Method according to one of claims 1 to 3,
characterized,
that the maximum size of the ignition current and / or the burning time is determined by the lead time of the rising edge of the additional control pulse (E) compared to the normal ignition pulse (N3).
dadurch gekennzeichnet,
daß die Brenndauer und/oder die Größe des Zündstroms durch die Breite des zusätzlichen Steuerimpulses (E) bestimmt wird.Method according to one of claims 1 to 4,
characterized,
that the burning time and / or the size of the ignition current is determined by the width of the additional control pulse (E).
dadurch gekennzeichnet,
daß aufgrund der Kürze des zusätzlichen Steuerimpulses (E) mit dem Impuls eines Monoflops (5) festgestellt wird, daß der kein normaler Zündimpuls ist, und infolgedessen kein Zündvorgang ausgelöst wird.Method according to claim 2,
characterized,
that due to the shortness of the additional control pulse (E) with the pulse of a monoflop (5) it is determined that this is not a normal ignition pulse, and consequently no ignition process is triggered.
dadurch gekennzeichnet,
daß ein Steuergerät (1), welches Motorkennziffern wie Temperatur und Winkellage der Kurbelwelle als Eingangsgröße erhält, ein davon abgeleitetes, zusätzliches Steuersignal (E) auf eine Zündendstufe (2) gibt, dessen ansteigende Flanke ein Monoflop (5) anstößt, dessen Impuls zusammen mit dem Steuersignal sowohl auf ein UND-Glied (7) als auch auf ein ODER-Glied (6) gegeben wird, dessen Ausgang als Signal zum Beladen der Spule dient und zum Rücksetzen eines Flipflops (8), welches durch das UND-Glied (7) gesetzt, das Signal zum Erhöhen des Zündstroms gibt.Circuit arrangement for carrying out the method for actuating an ignition coil, in which a short additional control pulse is transmitted in order to transmit additional information between the control electronics and the ignition output stage in a time range which is of no importance for the ignition.
characterized,
that a control unit (1), which receives engine parameters such as temperature and angular position of the crankshaft as an input variable, gives an additional control signal (E) derived therefrom to an ignition output stage (2), the rising edge of which is triggered by a monoflop (5), the pulse of which together with the control signal is given both to an AND gate (7) and to an OR gate (6), the output of which serves as a signal for loading the coil and for resetting a flip-flop (8) which is controlled by the AND gate (7 ) set, which gives the signal to increase the ignition current.
dadurch gekennzeichnet,
daß das Signal "Zündstrom erhöhen" mittels eines Schalters (S1) zur Erhöhung der Eingangsspannung eines ersten Operationsverstärkers (OP1) dient, welcher über einen weiteren Operationsverstärker (OP2), welcher als Integrator geschaltet ist, den Zündstrom in der Zündspule (3) dadurch erhöht, daß über einen Spannungsfolger und einen Leistungstransistor (TR) der Strom in der Primärwicklung der Zündspule (3) ansteigt, und daß der Ausgang der ODER-Stufe (6) "Spule beladen" an einen Halbleiterschalter (S2) am Eingang des dritten Operationsverstärkers (OP3) so lange geschlossen ist, so lange die Zündspule (3) zu laden ist.Circuit arrangement according to claim 7,
characterized,
that the signal "increase ignition current" by means of a switch (S1) serves to increase the input voltage of a first operational amplifier (OP1), which increases the ignition current in the ignition coil (3) via a further operational amplifier (OP2), which is connected as an integrator that the voltage in the primary winding of the ignition coil (3) rises via a voltage follower and a power transistor (TR), and that the output of the OR stage (6) "coil loaded" to a semiconductor switch (S2) at the input of the third operational amplifier ( OP3) is closed as long as the ignition coil (3) is to be charged.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4322014 | 1993-07-02 | ||
| DE4322014A DE4322014C2 (en) | 1993-07-02 | 1993-07-02 | Method for controlling an ignition coil of an ignition device for internal combustion engines and circuit arrangement for carrying out the method |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0632199A2 true EP0632199A2 (en) | 1995-01-04 |
| EP0632199A3 EP0632199A3 (en) | 1995-07-19 |
| EP0632199B1 EP0632199B1 (en) | 2000-02-02 |
Family
ID=6491769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94110260A Expired - Lifetime EP0632199B1 (en) | 1993-07-02 | 1994-07-01 | Method to control an ignition coil |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0632199B1 (en) |
| DE (2) | DE4322014C2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4419499A1 (en) | 1994-06-03 | 1995-12-07 | Interoc Vertriebsgesellschaft | Hydraulic impact device with infinitely variable number of impacts and impact energy |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2810665A1 (en) * | 1978-03-11 | 1979-09-20 | Bosch Gmbh Robert | Electronic ignition system for IC engine - has threshold stage generating further closing angle when engine parameter exceeds given threshold |
| JPS55122475A (en) * | 1979-03-15 | 1980-09-20 | Nec Corp | Pulse-current control circuit |
| EP0113894A2 (en) * | 1982-12-16 | 1984-07-25 | Mitsubishi Denki Kabushiki Kaisha | Ignition circuit for an internal combustion engine |
| US4552118A (en) * | 1983-03-17 | 1985-11-12 | Nec Corporation | Control circuit for controlling output pulse width using negative feedback signal |
| EP0324159A1 (en) * | 1988-01-15 | 1989-07-19 | TEMIC TELEFUNKEN microelectronic GmbH | Dwell control in a combustion engine with a separated final ignition stage |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06105070B2 (en) * | 1988-11-17 | 1994-12-21 | 株式会社日立製作所 | Semiconductor switching circuit |
| DE4007774A1 (en) * | 1990-03-12 | 1991-09-19 | Telefunken Electronic Gmbh | Four-stoke IC engine ignition installation - has cylinder group coil interface coupled to timing generator by single conductor |
| DE4038440C2 (en) * | 1990-12-01 | 1994-09-22 | Telefunken Microelectron | Electronic ignition system for internal combustion engines |
| DE4236397A1 (en) * | 1991-11-09 | 1993-05-13 | Volkswagen Ag | Electronic ignition for automobile IC engine - uses controller supplying regulating current for end stage transistor in ignition module providing ignition coil current |
| JPH06131661A (en) * | 1992-10-15 | 1994-05-13 | Kao Corp | Method and apparatus for production of magnetic recording medium |
-
1993
- 1993-07-02 DE DE4322014A patent/DE4322014C2/en not_active Expired - Fee Related
-
1994
- 1994-07-01 DE DE59409116T patent/DE59409116D1/en not_active Expired - Fee Related
- 1994-07-01 EP EP94110260A patent/EP0632199B1/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2810665A1 (en) * | 1978-03-11 | 1979-09-20 | Bosch Gmbh Robert | Electronic ignition system for IC engine - has threshold stage generating further closing angle when engine parameter exceeds given threshold |
| JPS55122475A (en) * | 1979-03-15 | 1980-09-20 | Nec Corp | Pulse-current control circuit |
| EP0113894A2 (en) * | 1982-12-16 | 1984-07-25 | Mitsubishi Denki Kabushiki Kaisha | Ignition circuit for an internal combustion engine |
| US4552118A (en) * | 1983-03-17 | 1985-11-12 | Nec Corporation | Control circuit for controlling output pulse width using negative feedback signal |
| EP0324159A1 (en) * | 1988-01-15 | 1989-07-19 | TEMIC TELEFUNKEN microelectronic GmbH | Dwell control in a combustion engine with a separated final ignition stage |
Non-Patent Citations (1)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 004 no. 175 (E-036) ,3.Dezember 1980 & JP-A-55 122475 (NEC CORP) 20.September 1980 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4322014C2 (en) | 1995-06-22 |
| DE59409116D1 (en) | 2000-03-09 |
| EP0632199B1 (en) | 2000-02-02 |
| EP0632199A3 (en) | 1995-07-19 |
| DE4322014A1 (en) | 1995-01-19 |
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