EP0041666A1 - Ignition device for internal-combustion engines - Google Patents

Ignition device for internal-combustion engines Download PDF

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Publication number
EP0041666A1
EP0041666A1 EP81104143A EP81104143A EP0041666A1 EP 0041666 A1 EP0041666 A1 EP 0041666A1 EP 81104143 A EP81104143 A EP 81104143A EP 81104143 A EP81104143 A EP 81104143A EP 0041666 A1 EP0041666 A1 EP 0041666A1
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EP
European Patent Office
Prior art keywords
ignition
pulse generator
combustion engines
ignition device
gear
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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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Application number
EP81104143A
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German (de)
French (fr)
Inventor
Brander Burckhard
Manfred Knüfelmann
Peter Budde
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schaeffler Engineering GmbH
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AFT Atlas Fahrzeugtechnik GmbH
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Publication date
Application filed by AFT Atlas Fahrzeugtechnik GmbH filed Critical AFT Atlas Fahrzeugtechnik GmbH
Publication of EP0041666A1 publication Critical patent/EP0041666A1/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
    • F02P7/00—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices
    • F02P7/06—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of circuit-makers or -breakers, or pick-up devices adapted to sense particular points of the timing cycle
    • F02P7/067—Electromagnetic pick-up devices, e.g. providing induced current in a coil
    • F02P7/0675—Electromagnetic pick-up devices, e.g. providing induced current in a coil with variable reluctance, e.g. depending on the shape of a tooth

Definitions

  • the invention relates to an ignition device for internal combustion engines with a gearwheel synchronously coupled to the crankshaft as a transmitter, a signal head assigned to the transmitter with a pot magnet and a downstream pulse generator.
  • the gear wheel serving as the encoder is directly connected to the crankshaft.
  • the number of teeth of this gear is approximately 100 teeth, preferably 96 teeth are provided.
  • the crankshaft makes two revolutions during a complete working period of a four-stroke engine, so that 192 pulses are available for a complete working period. Practical experience has shown that this number of pulses is useful for precise control of the ignition pulses.
  • the gear wheel When retrofitting an engine with an electronic ignition device, the gear wheel can easily be placed on the axis of the crankshaft. Such a gear can be provided in particular in connection with the flywheel or the like. You can also use the ring gear in which the starter engages. Difficulties arise when retrofitting internal combustion engines that are subsequently to be converted to electronic ignition, because the arrangement of the gearwheel serving as the encoder on the axis of the crankshaft is possible only with considerable effort.
  • the object of the invention is such a formation of a Zündvor direction of the type mentioned that the same is suitable for retrofitting internal combustion engines.
  • the invention proposes that the gear wheel is arranged on the ignition distributor shaft and has 40 to 60 teeth, that the inner core of the pot magnet has a diameter of less than 2.0 mm and that the pulse generator is followed by a pulse quadruple.
  • the invention thus uses the existing distributor.
  • the gear wheel serving as the encoder is attached to the ignition distributor shaft.
  • the ignition distributor shaft has a ratio of 2: 1 compared to the crankshaft.
  • the pulses of the pulse generator must then be multiplied by a factor of 4 in order to obtain the number of pulses required for the control.
  • This arrangement of the ignition device according to the invention can be easily installed at any time in an existing internal combustion engine, so that the advantages of electronic ignition can also be exploited by retrofitting internal combustion engines.
  • FIG. 1 shows an internal combustion engine 1. Inside the cylinder block 2, the axis 3 of the crankshaft is indicated. An ignition distributor shaft 4, which extends into an ignition distributor housing 5, is optionally driven by the crankshaft via intermediate wheels. The ignition distributor shaft 4 is not offset in a ratio of 2: 1 with respect to the speed of the crankshaft, so that the ignition distributor shaft 4 makes one revolution during a complete working period of a four-stroke engine.
  • a gearwheel 6 is keyed onto the distributor shaft 4 within the distributor housing 5.
  • a signal head 7, which contains a pot magnet 8, is arranged radially to the axis of the gear wheel 6.
  • the inner core 9 of the pot magnet carries signal windings, so that the signal head 7 emits 6 signals when the teeth of the gear 6 pass can.
  • These signals are amplified in an amplifier 10 and excite a pulse generator 11, which generates pulses of a desired pulse shape.
  • the pulses of the pulse generator 11 are quadrupled in a pulse quadruple 12.
  • the gear 6 has 48 teeth, for example. After the pulse has quadrupled, 4 192 pulses are available during one revolution of the ignition distributor shaft. This number of pulses has proven to be expedient for precise control of the ignition pulses.
  • the dimensions of the ignition distributor housing 5 are predetermined. If 48 teeth are provided on the gear 6, the tooth pitch is approximately 3 mm. So that a clean separation and resolution of the pulses is given, the inner core 9 of the pot magnet must have a diameter of less than 2 mm.
  • the ignition device according to the invention can be retrofitted to any internal combustion engine. For this it is only necessary to equip the ignition distributor shaft 4 with the gear 6 and to put a cover 13 with the signal head 7 on the ignition distributor housing 5.
  • the downstream electronics are provided with a pulse quadruple 12. The invention thus provides simple assemblies which can be attached to existing internal combustion engines at any time without extensive retrofitting work being necessary.

Abstract

The device comprises a toothed wheel (6) mounted on the ignition distributor shaft (4) of the engine and having between 40 and 60 teeth, a signal head (7) associated with the toothed wheel and provided with a pot magnet, the inner core of which has a diameter of less than 2.0 mm, a pulse generator (11) connected to the output of the signal head, and a pulse quadrupler (12) connected to the output of pulse generator for multiplying the number of pulses produced by the pulse generator by a factor of 4. <IMAGE>

Description

Die Erfindung betrifft eine Zündvorrichtung für Brennkraftmaschinen mit einem synchron mit der Kurbelwelle gekoppelten Zahnrad als Geber, einem dem Geber zugeordneten Signalkopf mit einem Topfmagnet und einem nachgeschalteten Impulsgenerator.The invention relates to an ignition device for internal combustion engines with a gearwheel synchronously coupled to the crankshaft as a transmitter, a signal head assigned to the transmitter with a pot magnet and a downstream pulse generator.

Eine Zündvorrichtung der genannten Art ist in der DE-AS 25 32 226 beschrieben. Das als Geber dienende Zahnrad ist mit der Kurbelwelle unmittelbar verbunden. Die Zähnezahl dieses Zahnrades beträgt etwa 100 Zähne, vorzugsweise sind 96 Zähne vorgesehen. Während einer vollständigen Arbeitsperiode eines Viertaktmotors macht die Kurbelwelle bekanntlich zwei Umdrehungen, so daß für eine vollständige Arbeitsperiode 192 Impulse zur Verfügung stehen. Die praktischen Erfahrungen haben ergeben, daß diese Impulszahl zur genauen Steuerung der Zündimpulse zweckmäßig ist.An ignition device of the type mentioned is described in DE-AS 25 32 226. The gear wheel serving as the encoder is directly connected to the crankshaft. The number of teeth of this gear is approximately 100 teeth, preferably 96 teeth are provided. As is known, the crankshaft makes two revolutions during a complete working period of a four-stroke engine, so that 192 pulses are available for a complete working period. Practical experience has shown that this number of pulses is useful for precise control of the ignition pulses.

Bei der Neuausrüstung eines Motors mit einer elektronischen Zündvorrichtung kann das Zahnrad leicht auf die Achse der Kurbelwelle aufgesetzt werden. Man kann insbesondere in Verbindung mit der Schwungscheibe oder dergleichen ein solches Zahnrad vorsehen. Man kann auch den Zahnkranz, in dem der Anlasser eingreift, hierfür verwenden. Bei der Nachrüstung von Brennkraftmaschinen, die nachträglich auf eine elektronische Zündung umgestellt werden sollen, ergeben sich jedoch Schwierigkeiten, weil die Anordnung des als Geber dienenden Zahnrades auf der Achse der Kurbelwelle nur mit erheblichem Aufwand möglich ist.When retrofitting an engine with an electronic ignition device, the gear wheel can easily be placed on the axis of the crankshaft. Such a gear can be provided in particular in connection with the flywheel or the like. You can also use the ring gear in which the starter engages. Difficulties arise when retrofitting internal combustion engines that are subsequently to be converted to electronic ignition, because the arrangement of the gearwheel serving as the encoder on the axis of the crankshaft is possible only with considerable effort.

Aufgabe der Erfindung ist eine solche Ausbildung einer Zündvorrichtung der genannten Art, daß sich dieselbe zur Nachrüstung von Brennkraftmaschinen eignet.The object of the invention is such a formation of a Zündvor direction of the type mentioned that the same is suitable for retrofitting internal combustion engines.

Als Lösung schlägt die Erfindung vor, daß das Zahnrad auf der Zündverteilerwelle angeordnet ist und 40 bis 60 Zähne aufweist, daß der Innenkern des Topfmagneten einen Durchmesser von weniger als 2,0 mm aufweist und daß dem Impulsgenerator ein Impulsvervierfacher nachgeschaltet ist.As a solution, the invention proposes that the gear wheel is arranged on the ignition distributor shaft and has 40 to 60 teeth, that the inner core of the pot magnet has a diameter of less than 2.0 mm and that the pulse generator is followed by a pulse quadruple.

Die Erfindung nutzt also den vorhandenen Zündverteiler aus. Auf die Zündverteilerwelle wird das als Geber dienende Zahrad aufgesteckt. Die Zündverteilerwelle ist bekanntlich gegenüber der Kurbelwelle im Verhältnis 2 : 1 untersetzt. Bei den üblichen Abmessungen des Zündverteilers kann man auf dem betreffenden Zahnrad ohne Schwierigkeiten 48 Zähne unterbringen. Es ist dann erforderlich, den Topfmagneten entsprechend zu bemessen. Die Impulse des Impulsgenerators müssen dann um einen Faktor 4 vervielfacht werden, damit man die für die Steuerung erforderliche Impulszahl erhält. Diese Anordnung der Zündvorrichtung nach der Erfindung läßt sich jederzeit leicht in eine vorhandene Brennkraftmaschine einbauen, so daß die Vorteile der elektronischen Zündung auch durch Nachrüstung von Brennkraftmaschinen ausgenutzt werden können.The invention thus uses the existing distributor. The gear wheel serving as the encoder is attached to the ignition distributor shaft. As is known, the ignition distributor shaft has a ratio of 2: 1 compared to the crankshaft. With the usual dimensions of the distributor, you can easily accommodate 48 teeth on the gear in question. It is then necessary to dimension the pot magnet accordingly. The pulses of the pulse generator must then be multiplied by a factor of 4 in order to obtain the number of pulses required for the control. This arrangement of the ignition device according to the invention can be easily installed at any time in an existing internal combustion engine, so that the advantages of electronic ignition can also be exploited by retrofitting internal combustion engines.

Eine Ausführungsform der Erfindung wird im folgenden unter Bezugnahme auf die anliegende Zeichnung erläutert, in der darstellen:

  • Fig. 1 eine schematische Darstellung einer Brennkraftmaschine,
  • Fig. 2 eine teilweise geschnittene Einzelansicht der Zündvorrichtung und
  • Fig. 3 eine Draufsicht zu Fig. 2.
An embodiment of the invention is explained below with reference to the accompanying drawing, in which:
  • 1 is a schematic representation of an internal combustion engine,
  • Fig. 2 is a partially sectioned individual view of the ignition device and
  • 3 is a top view of FIG. 2.

Fig. 1 zeigt eine Verbrennungskraftmaschine 1.-Innernalb des Zylinderblocks 2 ist die Achse 3 der Kurbelwelle angegeben. Von der Kurbelwelle wird gegebenenfalls über Zwischenräder eine Zündverteilerwelle 4 angetrieben, die in ein Zündverteilergehäuse 5 hineinreicht. Die Zündverteilerwelle 4 ist im Verhältnis 2 : 1 gegenüber der Drehzahl der Kurbelwelle unversetzt, so daß die Zündverteilerwelle 4 während einer vollständigen Arbeitsperiode eines Viertaktmotors eine Umdrehung ausführt.1 shows an internal combustion engine 1. Inside the cylinder block 2, the axis 3 of the crankshaft is indicated. An ignition distributor shaft 4, which extends into an ignition distributor housing 5, is optionally driven by the crankshaft via intermediate wheels. The ignition distributor shaft 4 is not offset in a ratio of 2: 1 with respect to the speed of the crankshaft, so that the ignition distributor shaft 4 makes one revolution during a complete working period of a four-stroke engine.

Innerhalb des Zündverteilergehäuses 5 ist ein Zahnrad 6 auf die Zündverteilerwelle 4 aufgekeilt. Radial zur Achse des Zahnrades 6 ist ein Signalkopf 7 angeordnet, der einen Topfmagneten 8 enthält. Der Innenkern 9 des Topfmagneten trägt Signalwicklungen, so daß der Signalkopf 7 beim Vorübergang der Zähne des Zahnrades 6 Signale abgeben kann. Diese Signale werden in einem Verstärker 10 verstärkt und erregen einen Impulsgenerator 11, der Impulse einer gewünschten Impulsform erzeugt. Die Impulse des Impulsgenerators 11 werden in einem Impulsvervierfacher 12 vervierfacht.A gearwheel 6 is keyed onto the distributor shaft 4 within the distributor housing 5. A signal head 7, which contains a pot magnet 8, is arranged radially to the axis of the gear wheel 6. The inner core 9 of the pot magnet carries signal windings, so that the signal head 7 emits 6 signals when the teeth of the gear 6 pass can. These signals are amplified in an amplifier 10 and excite a pulse generator 11, which generates pulses of a desired pulse shape. The pulses of the pulse generator 11 are quadrupled in a pulse quadruple 12.

Das Zahnrad 6 hat beispielsweise 48 Zähne. Nach der Impulsvervierfachung stehen also während einer Umdrehung der Zündverteilerwelle 4 192 Impulse zur Verfügung. Diese Impulszahl hat sich für eine genaue Steuerung der Zündimpulse als zweckmäßig erwiesen.The gear 6 has 48 teeth, for example. After the pulse has quadrupled, 4 192 pulses are available during one revolution of the ignition distributor shaft. This number of pulses has proven to be expedient for precise control of the ignition pulses.

Die Abmessungen des Zündverteilergehäuses 5 sind vorgegeben. Wenn auf dem Zahnrad 6 48 Zähne vorgesehen sind, beträgt die Zahnteilung etwa 3 mm. Damit eine saubere Trennung und Auflösung der Impulse gegeben ist, muß der Innenkern 9 des Topfmagneten einen Durchmesser von weniger als 2 mm haben.The dimensions of the ignition distributor housing 5 are predetermined. If 48 teeth are provided on the gear 6, the tooth pitch is approximately 3 mm. So that a clean separation and resolution of the pulses is given, the inner core 9 of the pot magnet must have a diameter of less than 2 mm.

Die Zündvorrichtung nach der Erfindung läßt sich nachträglich an jeder Brennkraftmaschine anbringen. Hierzu ist es lediglich erforderlich, die Zündverteilerwelle 4 mit dem Zahnrad 6 zu bestücken und auf das Zündverteilergehäuse 5 einen Deckel 13 mit dem Signalkopf 7 aufzusetzen. Die nachgeschaltete Elektronik erhält einen Impulsvervierfacher 12. Damit stellt die Erfindung einfache Baugruppen zur Verfügung, die jederzeit an bestehende Brennkraftmaschinen angebaut werden können, ohne daß umfangreiche Nachrüstarbeiten notwendig werden.The ignition device according to the invention can be retrofitted to any internal combustion engine. For this it is only necessary to equip the ignition distributor shaft 4 with the gear 6 and to put a cover 13 with the signal head 7 on the ignition distributor housing 5. The downstream electronics are provided with a pulse quadruple 12. The invention thus provides simple assemblies which can be attached to existing internal combustion engines at any time without extensive retrofitting work being necessary.

Claims (1)

Zündvorricntung für Brennkraftmaschinen mit einem synchron mit der
Figure imgb0001
gekoppelten Zahnrad (6) als Geber, einem dem Geber (6) zugeordneten Signalkopf (7) mit einem Topfmagneten (8) und einem nachgeschalteten Impulsgenerator (11), dadurch gekennzeichnet, daß das Zahnrad (6) auf der Zündverteilerwelle (4) angeordnet ist und 40 bis 60 Zähne aufweist, daß der Innenkern (9) des Topfmagneten (8) einen Durchmesser von weniger als 2,0 mm aufweist und daß dem Impulsgenerator (11) ein Impulsvervierfacher (12) nachgeschaltet ist.Ignition device for internal combustion engines with a synchronous with the
Figure imgb0001
coupled gear (6) as a transmitter, a signal head (7) assigned to the transmitter (6) with a pot magnet (8) and a downstream pulse generator (11), characterized in that the gear (6) is arranged on the ignition distributor shaft (4) and has 40 to 60 teeth, that the inner core (9) of the pot magnet (8) has a diameter of less than 2.0 mm and that the pulse generator (11) is followed by a pulse quadruple (12).
EP81104143A 1980-06-09 1981-05-29 Ignition device for internal-combustion engines Withdrawn EP0041666A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8018776A GB2077850A (en) 1980-06-09 1980-06-09 An Ignition Device for an Internal Combustion Engine
GB8018776 1980-06-09

Publications (1)

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EP0041666A1 true EP0041666A1 (en) 1981-12-16

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EP81104143A Withdrawn EP0041666A1 (en) 1980-06-09 1981-05-29 Ignition device for internal-combustion engines

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EP (1) EP0041666A1 (en)
ES (1) ES267294Y (en)
GB (1) GB2077850A (en)
SU (1) SU973036A3 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2328305A1 (en) * 1973-06-04 1975-01-02 Siemens Ag IGNITION DISTRIBUTORS FOR IGNITION SYSTEMS IN COMBUSTION ENGINE
US3875920A (en) * 1974-02-04 1975-04-08 Manufacturing Technology Enter Contactless ignition system using hall effect magnetic sensor
DE2532226A1 (en) * 1975-07-02 1977-01-13 Gunter Dipl Phys Dr Hartig PULSE GENERATOR
FR2370873A1 (en) * 1976-11-12 1978-06-09 Magneti Marelli Spa IMPROVEMENT IN THE MOUNTING OF MAGNETIC PULSE COILS ON IGNITION DISTRIBUTORS OF INTERNAL COMBUSTION ENGINES

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2328305A1 (en) * 1973-06-04 1975-01-02 Siemens Ag IGNITION DISTRIBUTORS FOR IGNITION SYSTEMS IN COMBUSTION ENGINE
US3875920A (en) * 1974-02-04 1975-04-08 Manufacturing Technology Enter Contactless ignition system using hall effect magnetic sensor
DE2532226A1 (en) * 1975-07-02 1977-01-13 Gunter Dipl Phys Dr Hartig PULSE GENERATOR
FR2370873A1 (en) * 1976-11-12 1978-06-09 Magneti Marelli Spa IMPROVEMENT IN THE MOUNTING OF MAGNETIC PULSE COILS ON IGNITION DISTRIBUTORS OF INTERNAL COMBUSTION ENGINES

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Publication number Publication date
ES267294Y (en) 1985-12-16
GB2077850A (en) 1981-12-23
SU973036A3 (en) 1982-11-07
ES267294U (en) 1985-05-16

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