EP0043891A1 - Magnetic ignition device for internal-combustion engines - Google Patents

Magnetic ignition device for internal-combustion engines Download PDF

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Publication number
EP0043891A1
EP0043891A1 EP81102591A EP81102591A EP0043891A1 EP 0043891 A1 EP0043891 A1 EP 0043891A1 EP 81102591 A EP81102591 A EP 81102591A EP 81102591 A EP81102591 A EP 81102591A EP 0043891 A1 EP0043891 A1 EP 0043891A1
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EP
European Patent Office
Prior art keywords
ignition
voltage half
waves
armature
diode
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Granted
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EP81102591A
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German (de)
French (fr)
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EP0043891B1 (en
Inventor
Georg Haubner
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Robert Bosch GmbH
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Robert Bosch GmbH
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Priority to AT81102591T priority Critical patent/ATE5611T1/en
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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
    • F02P1/00—Installations having electric ignition energy generated by magneto- or dynamo- electric generators without subsequent storage
    • F02P1/08—Layout of circuits
    • F02P1/086—Layout of circuits for generating sparks by discharging a capacitor into a coil circuit

Definitions

  • the invention relates to a magneto for internal combustion engines according to the preamble of the main claim.
  • the energy generated in the ignition armature is used both for the ignition of the internal combustion engine and for the supply of further consumers (DE-PS 11 29 607).
  • the ignition interrupter in parallel to the ignition interrupter, there is another consumer in the primary circuit which is preceded by a diode.
  • the ignition interrupter With each revolution of the magnet wheel, positive and negative voltage half-waves are alternately generated in the ignition armature, the ignition interrupter being opened by a breaker cam to trigger the ignition during a positive half-wave at the current maximum.
  • the diode is in the reverse direction for the positive voltage half-waves, so that these voltage half-waves are not loaded by the additionally connected consumer. Do not use them for ignition
  • the negative voltage half-waves are used to supply the consumer when the ignition interrupter is open, because the diode lies in the forward direction for these voltage half-waves.
  • the magneto according to the invention with the characterizing feature of the main claim has the advantage that the supply of additional consumers connected to the primary circuit of the magneto is significantly improved by the voltage half-waves, which are opposite to the voltage half-waves used for ignition, no longer by the ignition interrupter can be short-circuited.
  • a further advantage is that, regardless of the closing angle of the ignition interrupter, the short-circuiting of these voltage half-waves is prevented in a simple manner by a diode which is polarized in the reverse direction as a semiconductor being connected in series with the ignition interrupter. It is particularly advantageous that this diode can also be retrofitted to an existing ignition system.
  • the measure specified in the sub-claim enables advantageous further development and improvement of the feature specified in the main claim. This measure allows the supply of additional consumers to be significantly improved in the case of magnetic detonators with an external ignition coil.
  • FIG. 1 shows a magnetic igniter according to the invention in a schematic representation for an internal combustion engine with a spark plug and an accumulator as an additional consumer
  • FIG. 2 shows the course of the primary voltage with the rotating magnet wheel
  • FIG. 3 shows a magnetic generator with an external ignition coil and a connected accumulator battery.
  • the magneto of a 1-cylinder internal combustion engine is designated 10. It consists of a rotating magnet wheel 11 driven by the internal combustion engine, on the circumference of which four permanent magnets indicated in FIG. 1 are arranged in a uniformly distributed manner.
  • the magnet wheel interacts with a fixed ignition armature 12, the iron core of which carries a primary winding 13 and a secondary winding 14.
  • the secondary winding 14 is connected via an ignition cable 15 to a spark plug 16 of the internal combustion engine.
  • the magnet wheel 11 is provided with a likewise rotating interrupter cam 17 which actuates an ignition interrupter 18.
  • a spark suppressor capacitor 19 is also located in the primary circuit of the ignition armature 12 parallel to the primary winding 13.
  • a consumer Via a diode 20, a consumer is also connected in parallel to the primary winding 13 of the ignition armature, which is formed here by an accumulator battery 21.
  • Different light bulbs or a signal horn can be connected to battery terminals 22 and 23 of the accumulator 21, depending on the power.
  • the spark extinguishing capacitor 19 the ignition interrupter 18, the primary winding 13 and the secondary winding 14 and the spark plug 16, there is a connection to ground.
  • the ignition interrupter 18 is connected in series with a semiconductor formed from a diode 24.
  • This diode 24 is for the voltage half-waves of the ignition armature 12 required for ignition in the forward direction.
  • the mode of operation will be explained in more detail with the aid of FIG. 2.
  • the course of the primary voltage Up on the time axis t is shown for a slightly more than one revolution with a pole wheel 11 rotating in the direction of the arrow.
  • the ignition interrupter 18 is closed.
  • the ignition breaker 18 is opened by the breaker cam 17.
  • the primary current of the primary winding 13 flowing up to this point in time via the ignition interrupter 18 and the diode 24 is thereby interrupted. This results in a high-voltage pulse in the secondary winding 14, which reaches the spark plug 1.6 via the ignition cable 15 and generates an ignition spark there to trigger the ignition.
  • the ignition breaker 18 now remains open during the subsequent positive voltage half-wave, so that this voltage half-wave reaches the battery 21 via the diode 20 and charges the battery 21. If after approximately 130 ° crankshaft the ignition interrupter 18 is closed again by the cam 17, as indicated in FIG. 2, then a current can flow again via the ignition interrupter 18 and the diode 24 due to the following negative voltage half-wave. If the diode 24 were not present, a short-circuit current would practically flow through the ignition interrupter 18 even in the subsequent second positive voltage half-wave.
  • the insertion of the diode 24 now ensures that all positive voltage half-waves of the primary winding 13 are kept away from the ignition interrupter 18 since the diode 24 is in the reverse direction for these voltage half-waves. As a result, all positive voltage half-waves of the primary winding 13 can now reach the accumulator battery 21 via the diode 20, as a result of which a much better supply of the consumers connected there is ensured.
  • FIG. 3 shows, in a further exemplary embodiment, a magneto 30 with an ignition coil 31 arranged in a stationary manner outside the magneto 30.
  • an ignition armature 32 with only one armature winding 33 is provided, in which the alternating negative and positive voltage half-waves shown in FIG. 2 are provided be generated for the primary circuit.
  • the circuit elements already known from FIG. 1 are provided with the same reference numbers.
  • the primary winding 13 of the external ignition coil 31 is parallel to the armature winding of the ignition armature 32.
  • the primary winding 13 is connected in series with a third diode 34 as a semiconductor ring that it lies in the forward direction for the voltage half-waves required for ignition. Since in the embodiment according to FIG. 3 In contrast to FIG. 1, the positive pole of the accumulator battery 22 is grounded, the diodes 20 and 24 are also poled differently.
  • the operation of the ignition system according to FIG. 3 described below has the difference compared to the embodiment according to FIG. 1 that the triggering of the ignition is not a negative but a positive voltage half-wave of the armature winding 33.
  • the primary current is not interrupted in the ignition armature 32 at the time of ignition but is conducted into the ignition coil 31.
  • the ignition interrupter 18 is still closed, so that practically a short-circuit current flows from the armature winding 33 via the diode 24 and the ignition interrupter 18 to ground.
  • the ignition interrupter 18 is opened by the interrupter cam 17 at the time of ignition and the primary current now shoots into the primary winding 13 of the external ignition coil 31 via the diode 34.
  • a high-voltage pulse is generated in the secondary winding 14 of the ignition coil 31, which causes an ignition spark at the spark plug 16.
  • diodes 24 and 34 are each switched in the reverse direction. The negative half-wave therefore arrives in front of the armature winding 33 to the accumulator battery 21 and from there via the diode 20 lying in the forward direction back to the armature winding 33.
  • the diode 24 ensures that all positive voltage half-waves of the armature winding 33 are supplied the battery 21 are provided.
  • the negative voltage half-waves are not charged by the battery 21 because the diode 20 for this voltage half-waves is in the reverse direction.
  • the solution according to the invention is not limited to the exemplary embodiments shown, since it can be implemented in all magneto detonators in whose primary circuit voltage half-waves occur with alternating polarity and which trigger the ignition . only need voltage half-waves of a certain polarity.
  • the series connection of the diode 24 with the primary current interrupter 18 ensures an optimal supply of the additional loads connected to the primary winding via the diode 20; regardless of the number of poles of the magnet wheel and the opening angle of the ignition interrupter.
  • additional consumers can also be connected in the same way to ignition systems for multi-cylinder machines in which all voltage half-waves with the same polarity are required for ignition.
  • Transistors or other semiconductors or electronically controlled switches can also be used instead of the diodes, provided that it is ensured that they are controlled for continuity for the voltage half-waves required for the ignition.

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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)
  • Lighters Containing Fuel (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)

Abstract

1. A magneto for ignition systems of combustion engines comprising a rotary multipole pole wheel (11) and a fixed ignition armature (12), the armature winding (13, 33) of which ist connected to a primary current circuit comprising a contact breaker (18) interrupting the primary current at the ignition point, to a spark-quenching capacitor (19) and, through a semiconductor (20), to a load (21) in such a manner that the semiconductor (20) lies in a reverse direction for the voltage half-waves of the armature winding (13, 33) required for ignition, characterized in that the contact breaker (18) is connected in series with a semiconductor (24) lying in a forward direction for the voltage half-waves required for the ignition, and that furthermore the series circuit formed by the contact breaker (18) and the semiconductor (24) is directly connected to the armature winding (13, 33).

Description

Die Erfindung geht aus von einem Magnetzünder für Brennkraftmaschinen nach der Gattung des Hauptanspruchs. Bei einem derartigen, bekannten Magnetzünder wird die im Zündanker erzeugte Energie sowohl für die Zündung der Brennkraftmaschine als auch für die Versorgung weiterer Verbraucher verwendet (DE-PS 11 29 607). Hier liegt parallel zum Zündunterbrecher ein weiterer Verbraucher im Primärstromkreis, dem eine Diode vorgeschaltet ist. Bei jeder Umdrehung des Polrades werden im Zündanker abwechselnd positive und negative Spannungshalbwellen erzeugt, wobei der Zündunterbrecher zur Auslösung der Zündung während einer positiven Halbwelle im Strommaximum durch einen Unterbrechernocken geöffnet wird. Die Diode liegt für die positiven Spannungshalbwellen in Sperrichtung, so daß diese Spannungshalbwellen nicht durch den zusätzlich angeschlossenen Verbraucher belastet werden. Die zur Zündung nicht verwendeten negativen Spannungshalbwellen werden bei geöffnetem Zündunterbrecher zur Versorgung des Verbrauchers verwendet, denn die Diode liegt für diese Spannungshalbwellen in Durchlaßrichtung.The invention relates to a magneto for internal combustion engines according to the preamble of the main claim. In such a known magnetic igniter, the energy generated in the ignition armature is used both for the ignition of the internal combustion engine and for the supply of further consumers (DE-PS 11 29 607). Here, in parallel to the ignition interrupter, there is another consumer in the primary circuit which is preceded by a diode. With each revolution of the magnet wheel, positive and negative voltage half-waves are alternately generated in the ignition armature, the ignition interrupter being opened by a breaker cam to trigger the ignition during a positive half-wave at the current maximum. The diode is in the reverse direction for the positive voltage half-waves, so that these voltage half-waves are not loaded by the additionally connected consumer. Do not use them for ignition The negative voltage half-waves are used to supply the consumer when the ignition interrupter is open, because the diode lies in the forward direction for these voltage half-waves.

Derartige Magnetzünder haben jedoch den Nachteil, daß der Zündunterbrecher nur über einen relativ kleinen Winkelbereich von 900 bis 130° je Umdrehung des Polrades geöffnet wird, dagegen in einem großen Winkelbereich von 230° bis 270° geschlossen'ist und damit die Primärwicklung des Zündankers kurzschließt. Das hat zur Folge, daß allenfalls nur eine der negativen Spannungshalbwellen je Polradumdrehung zur Versorgung des zusätzlichen Verbrauchers zur Verfügung steht.However, such magneto have the disadvantage that the Breaker per revolution of the pole wheel opened only over a relatively small angular range of 90 0 to 130 °, on the other hand geschlossen'ist in a large angular range of 230 ° to 270 °, and thus the primary winding of the ignition armature shorts . The consequence of this is that at most only one of the negative voltage half-waves per pole wheel revolution is available to supply the additional consumer.

Vorteile der ErfindungAdvantages of the invention

Der erfindungsgemäße Magnetzünder mit dem kennzeichnenden Merkmal des Hauptanspruchs hat demgegenüber den Vorteil, daß die Versorgung zusätzlicher, am Primärstromkreis des Magnetzünders angeschlossener Verbraucher entscheidend verbessert wird, indem die Spannungshalbwellen, die zu den für die Zündung ausgenutzten Spannungshalbwellen entgegengesetzt gerichtet sind, nicht mehr durch den Zündunterbrecher kurzgeschlossen werden können. Ein weiterer Vorteil ist, daß unabhängig vom Schließwinkel des Zündunterbrechers der Kurzschluß dieser Spannungshalbwellen auf einfache Weise verhindert wird, indem eine in Sperrrichtung gepolte Diode als Halbleiter mit dem Zündunterbrecher in Reihe liegt. Besonders vorteilhaft ist, daß diese Diode auch bei einer vorhandenen Zündanlage nachträglich eingebaut werden kann.The magneto according to the invention with the characterizing feature of the main claim has the advantage that the supply of additional consumers connected to the primary circuit of the magneto is significantly improved by the voltage half-waves, which are opposite to the voltage half-waves used for ignition, no longer by the ignition interrupter can be short-circuited. A further advantage is that, regardless of the closing angle of the ignition interrupter, the short-circuiting of these voltage half-waves is prevented in a simple manner by a diode which is polarized in the reverse direction as a semiconductor being connected in series with the ignition interrupter. It is particularly advantageous that this diode can also be retrofitted to an existing ignition system.

Durch die im Unteranspruch aufgeführte Maßnahme ist eine vorteilhafte Weiterbildung und Verbesserung des im Hauptanspruch angegebenen Merkmales möglich. Durch diese Maßnahme läßt sich bei Magnetzündern mit einer außenliegenden Zündspule die Versorgung zusätzlicher Verbraucher wesentlich verbessern.The measure specified in the sub-claim enables advantageous further development and improvement of the feature specified in the main claim. This measure allows the supply of additional consumers to be significantly improved in the case of magnetic detonators with an external ignition coil.

Zeichnungdrawing

Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen Fig. 1 einen erfindungsgemäßen Magnetzünder in schematischer Darstellung für eine Brennkraftmaschine mit einer Zündkerze und einem Akkumulator als zusätzlichen Verbraucher, Fig. 2 zeigt den Verlauf der Primärspannung beim umlaufenden Polrad und Fig. 3 zeigt einen Magnetgenerator mit außenliegender Zündspule und angeschlossener Akkumulatorbatterie.Embodiments of the invention are shown in the drawing and explained in more detail in the following description. 1 shows a magnetic igniter according to the invention in a schematic representation for an internal combustion engine with a spark plug and an accumulator as an additional consumer, FIG. 2 shows the course of the primary voltage with the rotating magnet wheel, and FIG. 3 shows a magnetic generator with an external ignition coil and a connected accumulator battery.

Beschreibung der AusführungsbeispieleDescription of the embodiments

In Fig. 1 ist der Magnetzünder einer 1-Zylinder-Brennkraftmaschine mit 10 bezeichnet. Er besteht aus einem von der Brennkraftmaschine angetriebenen, umlaufenden Polrad 11, an dessen Umfang vier in Fig. 1 angedeutete Dauermagnete gleichmäßig verteilt angeordnet sind. Das Polrad wirkt mit einem feststehenden Zündanker 12 zusammen, dessen Eisenkern eine Primärwicklung 13 und eine Sekundärwicklung 14 trägt. Die Sekundärwicklung 14 ist über ein Zündkabel 15 mit einer Zündkerze 16 der Brennkraftmaschine verbunden. Das Polrad 11 ist mit einem ebenfalls umlaufenden Unterbrechernocken 17 versehen, der einen Zündunterbrecher 18 betätigt. Im Primärstromkreis des Zündankers 12 liegt ferner ein Funkenlöschkondensator 19 parallel zur Primärwicklung 13. Über eine Diode 20 ist ferner ein Verbraucher zur Primärwicklung 13 des Zündankers parallel geschaltet, der hier durch eine Akkumulatorbatterie 21 gebildet ist. An Batterieklemmen 22 und 23 des Akkumulators 21 können je nach Leistung verschiedene Glühlampen oder ein Signalhorn angeschlossen werden. Von der Akkumulatorbatterie 21, dem Funkenlöschkondensator 19, dem Zündunterbrecher 18, der Primärwicklung 13 und der Sekundärwicklung 14 sowie der Zündkerze 16 liegt jeweils ein Anschluß an Masse.In Fig. 1, the magneto of a 1-cylinder internal combustion engine is designated 10. It consists of a rotating magnet wheel 11 driven by the internal combustion engine, on the circumference of which four permanent magnets indicated in FIG. 1 are arranged in a uniformly distributed manner. The magnet wheel interacts with a fixed ignition armature 12, the iron core of which carries a primary winding 13 and a secondary winding 14. The secondary winding 14 is connected via an ignition cable 15 to a spark plug 16 of the internal combustion engine. The magnet wheel 11 is provided with a likewise rotating interrupter cam 17 which actuates an ignition interrupter 18. A spark suppressor capacitor 19 is also located in the primary circuit of the ignition armature 12 parallel to the primary winding 13. Via a diode 20, a consumer is also connected in parallel to the primary winding 13 of the ignition armature, which is formed here by an accumulator battery 21. Different light bulbs or a signal horn can be connected to battery terminals 22 and 23 of the accumulator 21, depending on the power. Of the accumulator battery 21, the spark extinguishing capacitor 19, the ignition interrupter 18, the primary winding 13 and the secondary winding 14 and the spark plug 16, there is a connection to ground.

Um die Stromversorgung für die Akkumulatorbatterie 21 und die daran angeschlossenen Verbraucher zu verbessern, ist der Zündunterbrecher 18 mit einem aus einer Diode 24 gebildeten Halbleiter in Reihe geschaltet. Diese Diode 24 liegt für die zur Zündung benötigten Spannungshalbwellen des Zündankers 12 in Durchlaßrichtung.In order to improve the power supply for the accumulator battery 21 and the consumers connected to it, the ignition interrupter 18 is connected in series with a semiconductor formed from a diode 24. This diode 24 is for the voltage half-waves of the ignition armature 12 required for ignition in the forward direction.

Die Wirkungsweise soll mit Hilfe der Fig. 2 näher erläutert werden. Dort ist der Verlauf der Primärspannung Up auf der Zeitachse t bei einem in Pfeilrichtung umlaufenden Polrad 11 für etwas mehr als eine Umdrehung dargestellt. Beim Beginn der ersten negativen Spannungshalbwelle der Primärwicklung 13 ist der Zündunterbrecher 18 geschlossen. Zum Zündzeitpunkt Zzp wird der Zündunterbrecher 18 durch den Unterbrechernocken 17 geöffnet. Der bis zu diesem Zeitpunkt über den Zündunterbrecher 18, und die Diode 24 fließende Primärstrom der Primärwicklung 13 wird dadurch unterbrochen. Dies hat in der Sekundärwicklung 14 einen Hochspannungsimpuls zur Folge, der über das Zündkabel 15 zur Zündkerze 1.6 gelangt und dort einen Zündfunken zur Auslösung der Zündung erzeugt. Der Zündunterbrecher 18 bleibt nun während der nachfolgenden positiven Spannungshalbwelle noch geöffnet, so daß diese Spannungshalbwelle über die Diode 20 zur Akkumulatorbatterie 21 gelangt und den Akkumulator 21 auflädt. Wird nach etwa 130° Kurbelwelle der Zündunterbrecher 18 - wie in Fig. 2 angedeutet - vom Nocken 17 wieder geschlossen, so.kann durch die folgende negative Spannungshalbwelle wieder ein Strom über den Zündunterbrecher 18 und die Diode 24 fließen. Wäre die Diode 24 nicht vorhanden, so würde auch bei der nachfolgenden zweiten positiven Spannungshalbwelle praktisch ein Kurzschlußstrom über den Zündunterbrecher 18 fließen. Durch die Einfügung der Diode 24 ist nunmehr sichergestellt, daß alle positiven Spannungshalbwellen der Primärwicklung 13 vom Zündunterbrecher 18 ferngehalten werden, da die Diode 24 für diese Spannungshalbwellen in Sperrichtung liegt. Demzufolge können nunmehr alle positiven Spannungshalbwellen der Primärwicklung 13 über die Diode 20 zur Akkumulatorbatterie 21 gelangen, wodurch eine wesentlich bessere Versorgung der dort angeschlossenen Verbraucher gewährleistet ist.The mode of operation will be explained in more detail with the aid of FIG. 2. The course of the primary voltage Up on the time axis t is shown for a slightly more than one revolution with a pole wheel 11 rotating in the direction of the arrow. At the beginning of the first negative voltage half-wave of the primary winding 13, the ignition interrupter 18 is closed. At the ignition point Zzp, the ignition breaker 18 is opened by the breaker cam 17. The primary current of the primary winding 13 flowing up to this point in time via the ignition interrupter 18 and the diode 24 is thereby interrupted. This results in a high-voltage pulse in the secondary winding 14, which reaches the spark plug 1.6 via the ignition cable 15 and generates an ignition spark there to trigger the ignition. The ignition breaker 18 now remains open during the subsequent positive voltage half-wave, so that this voltage half-wave reaches the battery 21 via the diode 20 and charges the battery 21. If after approximately 130 ° crankshaft the ignition interrupter 18 is closed again by the cam 17, as indicated in FIG. 2, then a current can flow again via the ignition interrupter 18 and the diode 24 due to the following negative voltage half-wave. If the diode 24 were not present, a short-circuit current would practically flow through the ignition interrupter 18 even in the subsequent second positive voltage half-wave. The insertion of the diode 24 now ensures that all positive voltage half-waves of the primary winding 13 are kept away from the ignition interrupter 18 since the diode 24 is in the reverse direction for these voltage half-waves. As a result, all positive voltage half-waves of the primary winding 13 can now reach the accumulator battery 21 via the diode 20, as a result of which a much better supply of the consumers connected there is ensured.

Fig. 3 zeigt in einem weiteren Ausführungsbeispiel einen Magnetzünder 30 mit einer außerhalb des Magnetzünders 30 stationär angeordneten Zündspule 31. Bei diesem Magnetzünder ist ein Zündanker 32 mit nur einer Ankerwicklung 33 vorgesehen, in dem die in Fig. 2 dargestellten, abwechselnd negativen und positiven Spannungshalbwellen für den Primärstromkreis erzeugt werden. Die bereits aus Fig. 1 bekannten Schaltungselemente sind mit gleichen Bezugsziffern versehen. Die Primärwicklung 13 der außenliegenden Zündspule 31 liegt parallel zur Ankerwicklung des Zündankers 32. Dabei ist die Primärwicklung 13 mit einer dritten Diode 34 als Halbleiterrin Reihe geschaltet, daß sie für die zur Zündung benötigten Spannungshalbwellen in Durchlaßrichtung liegt. Da in dem Ausführungsbeispiel nach Fig. 3 im Gegensatz zu Fig. 1 der Pluspol der Akkumulatorbatterie 22 auf Masse liegt, sind die Dioden 20 und 24 ebenfalls anders gepolt.3 shows, in a further exemplary embodiment, a magneto 30 with an ignition coil 31 arranged in a stationary manner outside the magneto 30. In this magneto, an ignition armature 32 with only one armature winding 33 is provided, in which the alternating negative and positive voltage half-waves shown in FIG. 2 are provided be generated for the primary circuit. The circuit elements already known from FIG. 1 are provided with the same reference numbers. The primary winding 13 of the external ignition coil 31 is parallel to the armature winding of the ignition armature 32. The primary winding 13 is connected in series with a third diode 34 as a semiconductor ring that it lies in the forward direction for the voltage half-waves required for ignition. Since in the embodiment according to FIG. 3 In contrast to FIG. 1, the positive pole of the accumulator battery 22 is grounded, the diodes 20 and 24 are also poled differently.

Die im folgenden beschriebene Wirkungsweise der Zündanlage nach Fig. 3 hat gegenüber dem Ausführungsbeispiel nach Fig. 1 zunächst einmal den Unterschied, daß zur Auslösung der Zündung nicht eine negative sondern eine positive Spannungshalbwelle der Ankerwicklung 33 verwendet wird. Außerdem wird der Primärstrom zum Zündzeitpunkt im Zündanker 32 nicht unterbrochen sondern in die Zündspule 31 geleitet. Beim Beginn der ersten positiven Spannungshalbwelle im Primärstromkreis ist der Zündunterbrecher 18 noch.geschlossen, so daß praktisch ein Kurzschlußstrom von der Ankerwicklung 33 über die Diode 24 und den Zündunterbrecher 18 zur Masse fließt. Erreicht dieser Strom seinen Scheitelwert, so wird der Zündunterbrecher 18 zum Zündzeitpunkt durch den Unterbrechernocken 17 geöffnet und der Primärstrom schießt nun augenblicklich über die Diode 34 in die Primärwicklung 13 der außenliegenden Zündspule 31 ein. Dadurch wird in der Sekundärwicklung 14 der Zündspule 31 ein Hochspannungsimpuls erzeugt, der an der Zündkerze 16 einen Zündfunken zur Folge hat. Für die nachfolgende negative Spannungshalbwelle der Ankerwicklung 33 sind die Diode 24 und 34 jeweils in Sperrichtung geschaltet. Die negative Halbwelle gelangt daher vor der Ankerwicklung 33 zur Akkumulatorbatterie 21 und von dort über die in Durchlaßrichtung liegende Diode 20 zurück zur Ankerwicklung 33. Durch die Diode 24 wird unabhängig von der Arbeitsstellung des Zündunterbrechers 18 sichergestellt, daß alle positiven Spannungshalbwellen der Ankerwicklung 33 zur Versorgung der Akkumulatorbatterie 21 zur Verfügung gestellt werden. Die negativen Spannungshalbwellen werden durch die Akkumulatorbatterie 21 nicht belastet, da die Diode 20 für diese Spannungshalbwellen in Sperrichtung liegt.The operation of the ignition system according to FIG. 3 described below has the difference compared to the embodiment according to FIG. 1 that the triggering of the ignition is not a negative but a positive voltage half-wave of the armature winding 33. In addition, the primary current is not interrupted in the ignition armature 32 at the time of ignition but is conducted into the ignition coil 31. At the beginning of the first positive voltage half-wave in the primary circuit, the ignition interrupter 18 is still closed, so that practically a short-circuit current flows from the armature winding 33 via the diode 24 and the ignition interrupter 18 to ground. If this current reaches its peak value, the ignition interrupter 18 is opened by the interrupter cam 17 at the time of ignition and the primary current now shoots into the primary winding 13 of the external ignition coil 31 via the diode 34. As a result, a high-voltage pulse is generated in the secondary winding 14 of the ignition coil 31, which causes an ignition spark at the spark plug 16. For the subsequent negative voltage half-wave of armature winding 33, diodes 24 and 34 are each switched in the reverse direction. The negative half-wave therefore arrives in front of the armature winding 33 to the accumulator battery 21 and from there via the diode 20 lying in the forward direction back to the armature winding 33. Independent of the working position of the ignition interrupter 18, the diode 24 ensures that all positive voltage half-waves of the armature winding 33 are supplied the battery 21 are provided. The negative voltage half-waves are not charged by the battery 21 because the diode 20 for this voltage half-waves is in the reverse direction.

Die erfindungsgemäße Lösung ist nicht auf die dargestellten Ausführungsbeispiele beschränkt da sie sich bei allen Magnetzündern realisieren läßt, in deren Primärstromkreis Spannungshalbwellen mit abwechselnder Polarität auftreten und die zur Auslösung der Zündung.nur Spannungshalbwellen einer bestimmten Polarität benötigen. Durch die Reihenschaltung der Diode 24 mit dem Primärstromunterbrecher 18 wird eine optimale Versorgung der über die Diode 20 an die Primärwicklung angeschlossenen zusätzlichen Verbraucher sichergestellt; und zwar unabhängig von der Polzahl des Polrades und vom öffnungswinkel des Zündunterbrechers. Schließlich können in gleicher Weise auch zusätzliche Verbraucher an Zündanlagen für Mehrzylinder-Maschinen angeschlossen werden, bei denen alle Spannungshalbwellen mit gleicher Polarität zur Zündung benötigt werden. Dabei lassen sich anstelle der Dioden auch Transistoren oder andere Halbleiter bzw. elektronisch gesteuerte Schalter verwenden, sofern sichergestellt ist, daß sie für die zur Zündung benötigten Spannungshalbwellen auf Durchgang gesteuert sind.The solution according to the invention is not limited to the exemplary embodiments shown, since it can be implemented in all magneto detonators in whose primary circuit voltage half-waves occur with alternating polarity and which trigger the ignition . only need voltage half-waves of a certain polarity. The series connection of the diode 24 with the primary current interrupter 18 ensures an optimal supply of the additional loads connected to the primary winding via the diode 20; regardless of the number of poles of the magnet wheel and the opening angle of the ignition interrupter. Finally, additional consumers can also be connected in the same way to ignition systems for multi-cylinder machines in which all voltage half-waves with the same polarity are required for ignition. Transistors or other semiconductors or electronically controlled switches can also be used instead of the diodes, provided that it is ensured that they are controlled for continuity for the voltage half-waves required for the ignition.

Claims (2)

1. Magnetzünder für Zündanlagen von Brennkraftmaschinen mit einem mehrpoligen Polrad und einem Zündanker, dessen Primärstromkreis mit einem Zündunterbrecher, einem Funkenlöschkondensator und über eine Diode mit einem Verbraucher derart verbunden ist, daß die Diode für die zur Zündung benötigten Spannungshalbwellen des Zündankers in Sperrrichtung liegt, dadurch gekennzeichnet, daß der Zündunterbrecher (18) mit einem Halbleiter (24) derart in Reihe geschaltet ist, daß der Halbleiter (24) für die zur Zündung benötigten Spannungshalbwellen in Durchlaßrichtung liegt.1. Magneto for ignition systems of internal combustion engines with a multi-pole magnet wheel and an ignition armature, the primary circuit of which is connected to an ignition interrupter, a spark extinguishing capacitor and via a diode to a consumer such that the diode for the voltage half-waves of the ignition armature required for ignition lies in the blocking direction, thereby characterized in that the ignition interrupter (18) is connected in series with a semiconductor (24) such that the semiconductor (24) is in the forward direction for the voltage half-waves required for ignition. 2. Magnetzünder nach Anspruch 1, dadurch gekennzeichnet, daß die Primärwicklung (13) einer außenliegenden, an der Ankerwicklung (33) des Zündankers (32) angeschlossenen Zündspule (31) mit einem weiteren Halbleiter (34) derart in Reihe geschaltet ist, daß er für die zur Zündung benötigten Spannungshalbwellen in Durchlaßrichtung liegt. zi 2. Magnetic igniter according to claim 1, characterized in that the primary winding (13) of an external, on the armature winding (33) of the ignition armature (32) connected ignition coil (31) with a further semiconductor (34) is connected in series such that it for the voltage half-waves required for ignition is in the forward direction. zi
EP81102591A 1980-07-10 1981-04-07 Magnetic ignition device for internal-combustion engines Expired EP0043891B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81102591T ATE5611T1 (en) 1980-07-10 1981-04-07 SOLENOID IGNITER FOR COMBUSTION ENGINES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3026142A DE3026142A1 (en) 1980-07-10 1980-07-10 MAGNETIC IGNITIONER FOR INTERNAL COMBUSTION ENGINES
DE3026142 1980-07-10

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EP0043891A1 true EP0043891A1 (en) 1982-01-20
EP0043891B1 EP0043891B1 (en) 1983-12-14

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EP81102591A Expired EP0043891B1 (en) 1980-07-10 1981-04-07 Magnetic ignition device for internal-combustion engines

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EP (1) EP0043891B1 (en)
AT (1) ATE5611T1 (en)
DE (2) DE3026142A1 (en)
ES (1) ES8205295A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0359850A1 (en) * 1988-09-21 1990-03-28 Tanaka Kogyo Co., Ltd. Small engine for hand-held work machines

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2198547A5 (en) * 1972-08-29 1974-03-29 Bosch Gmbh Robert
GB1452776A (en) * 1972-11-29 1976-10-13 Bosch Gmbh Robert Ignition systems for internal combustion engines
DE2730002A1 (en) * 1977-07-02 1979-01-18 Bosch Gmbh Robert Ignition system for IC engines - has ignition instant at high speeds determined by induction voltage generated by magnet in armature

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2198547A5 (en) * 1972-08-29 1974-03-29 Bosch Gmbh Robert
GB1452776A (en) * 1972-11-29 1976-10-13 Bosch Gmbh Robert Ignition systems for internal combustion engines
DE2730002A1 (en) * 1977-07-02 1979-01-18 Bosch Gmbh Robert Ignition system for IC engines - has ignition instant at high speeds determined by induction voltage generated by magnet in armature

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0359850A1 (en) * 1988-09-21 1990-03-28 Tanaka Kogyo Co., Ltd. Small engine for hand-held work machines

Also Published As

Publication number Publication date
DE3161620D1 (en) 1984-01-19
ES503808A0 (en) 1982-06-01
EP0043891B1 (en) 1983-12-14
ES8205295A1 (en) 1982-06-01
DE3026142A1 (en) 1982-02-11
ATE5611T1 (en) 1983-12-15

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