EP0325587B1 - Ignition and injection system for internal combustion engines - Google Patents

Ignition and injection system for internal combustion engines Download PDF

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Publication number
EP0325587B1
EP0325587B1 EP87905598A EP87905598A EP0325587B1 EP 0325587 B1 EP0325587 B1 EP 0325587B1 EP 87905598 A EP87905598 A EP 87905598A EP 87905598 A EP87905598 A EP 87905598A EP 0325587 B1 EP0325587 B1 EP 0325587B1
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EP
European Patent Office
Prior art keywords
ignition
injection system
phase
hall
beginning
Prior art date
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Expired - Lifetime
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EP87905598A
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German (de)
French (fr)
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EP0325587A1 (en
Inventor
Helmut Denz
Rudolf Moz
Winfried Uttenweiler
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Robert Bosch GmbH
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Robert Bosch GmbH
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/009—Electrical control of supply of combustible mixture or its constituents using means for generating position or synchronisation signals
    • 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
    • F02P15/008—Reserve ignition systems; Redundancy of some ignition devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • 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
    • 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
    • F02P7/07—Hall-effect pick-up devices

Definitions

  • the invention relates to an ignition system for internal combustion engines according to the preamble of the main claim.
  • phase pulse for example, a reference mark is derived from the ring gear or from the flywheel of the crankshaft. This reference mark occurs once per revolution of the crankshaft, so that only every second reference mark falls within the period of the phase signal.
  • the phase signal and the reference mark thus characterize the beginning of an ignition cycle, from which an exact determination of the optimal ignition times can be carried out in a microprocessor, taking into account further engine data, in particular taking into account the speed. If the encoder for the reference mark or the speed fails in such a system, the motor can no longer be operated.
  • the main claim has the advantage that the further cutouts, which are assigned to the individual top dead centers of the cylinders, each generate a phase signal by means of a Hall sensor, from which a defined fixed ignition angle can be determined.
  • a widened recess which generates a widened phase pulse, indicates the start of an ignition cycle if a reference mark falls within this phase window.
  • the other phase windows must be so narrow that the second reference mark does not come to rest within two revolutions, so that unambiguous cylinder recognition is guaranteed.
  • the phase pulses represent practically the closing time for the ignition coil or for the injection pulses, the ignition spark being generated when the trailing edge of the phase pulses occurs.
  • the ignition angle can be 10 ° before top dead center, for example.
  • the speed can also be determined from the time interval between the trailing edges and a closing time adapted to the speed during which the ignition coil is being charged or the injection time can be determined by the computer. This measure optimizes the emergency firing angle function.
  • the limp home function can also be improved by determining the speed from the fixed trailing edges and from this a delay time for the start of closing and a delay time for the ignition. As a result, a more precise closing time and a variable ignition angle can be achieved for stationary operation, as a result of which overheating of the output stage can be avoided.
  • the measure according to the invention is not limited to ignition systems, but can also be applied to injection systems.
  • the Hall diaphragm 1 shown in FIG. 1a and FIG. 1b has four cutouts 2, 3, 4, 5, of which the cutout 2 is widened compared to the other cutouts 3 to 5.
  • Hall orifice 1 is installed in the ignition distributor or on the camshaft and rotates synchronously with the distributor finger.
  • a Hall sensor 6, the sensor signals of an electronic motor controller 7, is located at a short distance from the Hall aperture 1 ( Figure 2) are supplied.
  • the motor controller 7 shown in FIG. 2 generates the phase signal PS from the sensor signal, which is fed to a computer port 8.
  • a signal converter 9 is provided, which converts the signal received by the Hall sensor 6 into a square-wave signal.
  • Further signal converters 10, 11 are provided, which generate square-wave signals for further evaluation from the reference mark BM derived from the toothed ring of the flywheel and from the speed signal emitted by a speed sensor 12.
  • an emergency operation function can be implemented solely on the basis of the sensor signal emitted by the Hall sensor 6.
  • the top dead center OT of cylinders 1 to 4 is entered in the upper line.
  • the phase signal PS which contains a wider phase pulse PI1 at the beginning of an ignition cycle.
  • the other phase pulses PI2 to PI4 are shorter.
  • the trailing edges R occur with all phase pulses PI1 to PI4 by 10 ° of the crankshaft revolution before top dead center OT of the associated cylinder.
  • the temporal assignment of the reference mark BM which has already been shaped as a rectangular signal, is ensured in such a way that the middle reference mark BM2 does not coincide with a phase pulse. Only the reference mark pulse BM1 coincides with the wider phase pulse PI1, as a result of which the start of the ignition cycle is indicated in synchronized, trouble-free normal operation.
  • an emergency operation function can be maintained solely on the basis of the phase signal PS.
  • the ignition coil ZSP1 of the ignition output stage 14 (FIG. 2) is loaded at the beginning of each phase pulse of the phase signal PS and, when the trailing edge R occurs, the ignition is triggered 10 ° before top dead center OT.
  • the phase signal thus defines a fixed emergency ignition angle, which enables emergency operation in the absence of a reference mark or in the absence of a speed signal.
  • FIG. 4 shows the corresponding diagrams for a 5-cylinder engine, in which a phase pulse PI1 to PI5 is assigned to each cylinder.
  • the additional possibility is given for the current profile of the ignition coil ZSP1 that the time between two successive trailing edges is used to determine the speed.
  • a corrected time for charging the ignition coil can then be calculated from the determined speed.
  • the case is also shown where the closing point and the ignition point are calculated on the basis of the preceding phase edge.
  • the speed can be calculated from the fixed trailing edges and a delay time t VS for the start of closing and a delay time t VZ for the ignition point can be determined therefrom, so that a more precise closing time and a variable ignition angle can be realized for stationary operation.

Abstract

In an injection system for internal combustion engines, a phase sensor synchronously driven with the ignition distributor, in particular a Hall shutter, has several shutter sections, one of which is enlarged and indicates the beginning of an ignition or injection cycle in emergencies. The sections generate phase pulses of corresponding lengths, at the beginning of which the ignition coil is charged until the trailing edge is reached and ignition occurs. The trailing edge of each phase pulse can be reached for example 10° before the top dead centre of the corresponding cylinder. An emergency igniting function can thus be obtained in a simple manner and, in the event of a breakdown, ignition can be initiated more rapidly.

Description

Stand der TechnikState of the art

Die Erfindung bezieht sich auf ein Zündsystem für Verbrennungsmotoren gemäß der Gattung des Hauptanspruchs.The invention relates to an ignition system for internal combustion engines according to the preamble of the main claim.

Es ist bekannt, in Zündsystemen mit Zylindererkennung Hallblenden im Zündverteiler zu verwenden, deren Blende eine Aussparung besitzt, die einen Phasenimpuls pro 720° Kurbelwellendrehung erzeugt. Während des Phasenimpulses wird beispielsweise vom Zahnkranz bzw. von der Schwungscheibe der Kurbelwelle eine Bezugsmarke abgeleitet. Diese Bezugsmarke tritt pro Umdrehung der Kurbelwelle einmal auf, so daß nur jede zweite Bezugsmarke in den Zeitraum des Phasensignals fällt. Das Phasensignal und die Bezugsmarke kennzeichnen somit zusammen den Beginn eines Zündzyklus, woraus in einem Mikroprozessor unter Berücksichtigung weiterer Motordaten, insbesondere unter Berücksichtigung der Drehzahl, eine exakte Bestimmung der optimalen Zündzeitpunkte vorgenommen werden kann. Fällt bei einer solchen Anlage der Geber für die Bezugsmarke bzw. für die Drehzahl aus, so kann der Motor nicht mehr weiterbetrieben werden.It is known to use Hall diaphragms in the ignition distributor in ignition systems with cylinder recognition, the diaphragm of which has a recess which generates a phase pulse per 720 ° crankshaft rotation. During the phase pulse, for example, a reference mark is derived from the ring gear or from the flywheel of the crankshaft. This reference mark occurs once per revolution of the crankshaft, so that only every second reference mark falls within the period of the phase signal. The phase signal and the reference mark thus characterize the beginning of an ignition cycle, from which an exact determination of the optimal ignition times can be carried out in a microprocessor, taking into account further engine data, in particular taking into account the speed. If the encoder for the reference mark or the speed fails in such a system, the motor can no longer be operated.

Vorteile der ErfindungAdvantages of the invention

Ein Zünd- und Einspritzsystem mit den Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, daß die weiteren Aussparungen, die den einzelnen oberen Totpunkten der Zylinder zugeordnet sind, jeweils ein Phasensignal mittels eines Hallsensors erzeugen, woraus ein definierter Festzündwinkel festgelegt werden kann. Dabei gibt eine verbreiterte Aussparung, die einen verbreiterten Phasenimpuls erzeugt, den Beginn eines Zündzyklus an, wenn in dieses Phasenfenster eine Bezugsmarke fällt. Die anderen Phasenfenster müssen so schmal sein, daß die zweite Bezugsmarke im Laufe von zwei Umdrehungen nicht darin zu liegen kommt, so daß eine eindeutige Zylindererkennung gewährleistet ist. Für den Notlauf und gegebenenfalls den Start stellen die Phasenimpulse praktisch die Schließzeit für die Zündspule bzw. für die Einspritzimpulse dar, wobei bei Auftreten der Rückflanke der Phasenimpulse der Zündfunke erzeugt wird. Dies hat nicht nur den Vorteil, daß im Störungsfall eine Notlaufzündwinkelfunktion auf einfache Weise realisiert wird, sondern daß auch beim Motorstart, ein früherer Zündbeginn und dadurch kürzere Startzeiten erzielt werden.An ignition and injection system with the characteristics of the In contrast, the main claim has the advantage that the further cutouts, which are assigned to the individual top dead centers of the cylinders, each generate a phase signal by means of a Hall sensor, from which a defined fixed ignition angle can be determined. A widened recess, which generates a widened phase pulse, indicates the start of an ignition cycle if a reference mark falls within this phase window. The other phase windows must be so narrow that the second reference mark does not come to rest within two revolutions, so that unambiguous cylinder recognition is guaranteed. For the emergency operation and possibly the start, the phase pulses represent practically the closing time for the ignition coil or for the injection pulses, the ignition spark being generated when the trailing edge of the phase pulses occurs. This not only has the advantage that an emergency ignition angle function can be implemented in a simple manner in the event of a fault, but also that an earlier start of ignition and thus shorter start times are achieved when the engine is started.

Der Zündwinkel kann beispielsweise 10° vor dem oberen Totpunkt liegen. Aus dem zeitlichen Abstand der Rückflanken kann außerdem die Drehzahl ermittelt und vom Rechner eine an die Drehzahl angepaßte Schließzeit, während der die Zündspule geladen wird, oder Einspritzzeit bestimmt werden. Durch diese Maßnahme wird eine Optimierung der Notlaufzündwinkelfunktion erreicht. Die Notlauffunktion kann auch dadurch verbessert werden, daß aus den festen Rückflanken die Drehzahl und daraus eine Verzögerungszeit für den Schließbeginn und eine Verzögerungszeit für die Zündung ermittelt wird. Dadurch kann für den Stationärbetrieb eine genauere Schließzeit und ein variabler Zündwinkel realisiert werden, wodurch Überhitzungen der Endstufe vermieden werden können.The ignition angle can be 10 ° before top dead center, for example. The speed can also be determined from the time interval between the trailing edges and a closing time adapted to the speed during which the ignition coil is being charged or the injection time can be determined by the computer. This measure optimizes the emergency firing angle function. The limp home function can also be improved by determining the speed from the fixed trailing edges and from this a delay time for the start of closing and a delay time for the ignition. As a result, a more precise closing time and a variable ignition angle can be achieved for stationary operation, as a result of which overheating of the output stage can be avoided.

Im störungsfreien Normalbetrieb treten zwei Bezugsmarken pro Zündzyklus auf, wobei die in der Mitte eines Zündzyklus auftretende Bezugsmarke nicht mit einem Phasenimpuls zusammenfällt, so daß diese Bezugsmarke auch nicht fälschlicherweise als Anfangsmarke eines Zündzyklus angesehen werden kann.In trouble-free normal operation, two reference marks occur per ignition cycle, the reference mark occurring in the middle of an ignition cycle not coinciding with a phase pulse, so that this reference mark cannot also be incorrectly regarded as the starting mark of an ignition cycle.

Die erfindungsgemäße Maßnahme ist nicht auf Zündsysteme beschränkt, sondern ist auch auf Einspritzsysteme anwendbar.The measure according to the invention is not limited to ignition systems, but can also be applied to injection systems.

ZeichnnungDrawing

Die Erfindung wird nachfolgend anhand der Zeichnung näher erläutert. Es zeigen:

  • Figur 1a eine Hallblende in der Draufsicht,
  • Figur 1b die in der Figur 1a dargestellte Hallblende in der Seitenansicht,
  • Figur 2 ein Blockschaltbild des Zündsystems für einen 4-Zylinder-Motor,
  • Figur 3 mehrere Diagramme eines 4-Zylinder-Motors und
  • Figur 4 mehrere Diagramme eines 5-Zylinder-Motors.
The invention is explained below with reference to the drawing. Show it:
  • FIG. 1a shows a Hall aperture in a top view,
  • 1b shows the Hall aperture shown in FIG. 1a in a side view,
  • FIG. 2 shows a block diagram of the ignition system for a 4-cylinder engine,
  • Figure 3 shows several diagrams of a 4-cylinder engine and
  • Figure 4 shows several diagrams of a 5-cylinder engine.

Die in Figur 1a und Figur 1b dargestellte Hallblende 1 besitzt vier Ausschnitte 2, 3, 4, 5, von denen die Aussparung 2 gegenüber den übrigen Aussparungen 3 bis 5 verbreitet ist. Die Hallblende 1 wird im Zündverteiler oder auf der Nockenwelle eingebaut und dreht sich synchron mit dem Verteilerfinger. In geringem Abstand von der Hallblende 1 befindet sich eine Hallsonde 6, deren Sensorsignale einer elektronischen Motorsteuerung 7 (Figur 2) zugeführt werden.The Hall diaphragm 1 shown in FIG. 1a and FIG. 1b has four cutouts 2, 3, 4, 5, of which the cutout 2 is widened compared to the other cutouts 3 to 5. Hall orifice 1 is installed in the ignition distributor or on the camshaft and rotates synchronously with the distributor finger. A Hall sensor 6, the sensor signals of an electronic motor controller 7, is located at a short distance from the Hall aperture 1 (Figure 2) are supplied.

Die in Figur 2 dargestellte Motorsteuerung 7 erzeugt aus dem Sensorsignal das Phasensignal PS, welches einem Rechner-Port 8 zugeführt wird. Zur Aufbereitung des Phasensignals ist ein Signalumformer 9 vorgesehen, der das vom Hallsensor 6 empfangene Signal in ein Rechtecksignal umwandelt. Es sind weitere Signalumformer 10, 11 vorgesehen, die aus der vom Zahnkranz der Schwungscheibe abgeleiteten Bezugsmarke BM und aus dem von einem Drehzahlsensor 12 abgegebenen Drehzahlsignal Rechtecksignale für die weitere Auswertung erstellen.The motor controller 7 shown in FIG. 2 generates the phase signal PS from the sensor signal, which is fed to a computer port 8. To process the phase signal, a signal converter 9 is provided, which converts the signal received by the Hall sensor 6 into a square-wave signal. Further signal converters 10, 11 are provided, which generate square-wave signals for further evaluation from the reference mark BM derived from the toothed ring of the flywheel and from the speed signal emitted by a speed sensor 12.

Fällt nun aufgrund der Störung die Bezugsmarke BM bzw. das Drehzahlsignal n aus, so kann alleine aufgrund des vom Hallsensor 6 abgegebenen Sensorsignals eine Notlaufzündfunktion realisiert werden.If the reference mark BM or the speed signal n fails due to the disturbance, then an emergency operation function can be implemented solely on the basis of the sensor signal emitted by the Hall sensor 6.

Aus Figur 3 ist in der oberen Zeile jeweils der obere Totpunkt OT der Zylinder 1 bis 4 eingetragen. Darunter ist das Phasensignal PS angegeben, welches zu Beginn eines Zündzyklus einen breiteren Phasenimpuls PI1 enthält. Die weiteren Phasenimpulse PI2 bis PI4 sind kürzer. Die Rückflanken R treten bei sämtlichen Phasenimpulsen PI1 bis PI4 um 10° der Kurbelwellenumdrehung vor dem oberen Totpunkt OT des zugehörigen Zylinders auf.From Figure 3, the top dead center OT of cylinders 1 to 4 is entered in the upper line. Below this is the phase signal PS, which contains a wider phase pulse PI1 at the beginning of an ignition cycle. The other phase pulses PI2 to PI4 are shorter. The trailing edges R occur with all phase pulses PI1 to PI4 by 10 ° of the crankshaft revolution before top dead center OT of the associated cylinder.

Die zeitliche Zuordnung der bereits als Rechtecksignal umgeformten Bezugsmarke BM ist so gewährleistet, daß die mittlere Bezugsmarke BM2 nicht mit einem Phasenimpuls zeitlich zusammenfällt. Nur der Bezugsmarkenimpuls BM1 fällt mit dem breiteren Phasenimpuls PI1 zusammen, wodurch im synchronisierten, störungsfreien Normalbetrieb der Beginn des Zündzyklus angegeben wird.The temporal assignment of the reference mark BM, which has already been shaped as a rectangular signal, is ensured in such a way that the middle reference mark BM2 does not coincide with a phase pulse. Only the reference mark pulse BM1 coincides with the wider phase pulse PI1, as a result of which the start of the ignition cycle is indicated in synchronized, trouble-free normal operation.

Fällt das Bezugsmarkensignal BM aufgrund einer Störung aus, so kann eine Notlaufzündfunktion alleine aufgrund des Phasensignals PS aufrechterhalten werden. In diesem Fall wird die Zündspule ZSP1 der Zündungsendstufe 14 (Figur 2) zu Beginn jedes Phasenimpulses des Phasensignals PS geladen und bei Auftreten der Rückflanke R die Zündung jeweils 10° vor dem oberen Totpunkt OT ausgelöst. Das Phasensignal definiert somit einen festen Notlaufzündwinkel, der einen Notbetrieb bei fehlender Bezugsmarke bzw. bei fehlendem Drehzahlsignal ermöglicht.If the reference mark signal BM falls due to a fault off, an emergency operation function can be maintained solely on the basis of the phase signal PS. In this case, the ignition coil ZSP1 of the ignition output stage 14 (FIG. 2) is loaded at the beginning of each phase pulse of the phase signal PS and, when the trailing edge R occurs, the ignition is triggered 10 ° before top dead center OT. The phase signal thus defines a fixed emergency ignition angle, which enables emergency operation in the absence of a reference mark or in the absence of a speed signal.

Figur 4 zeigt die entsprechenden Diagramme für einen 5-Zylinder-Motor, bei dem jedem Zylinder ein Phasenimpuls PI1 bis PI5 zugeordnet ist. Hier ist jedoch beim Stromverlauf der Zündspule ZSP1 die zusätzliche Möglichkeit angegeben, daß die Zeit zwischen zwei aufeinanderfolgenden Rückflanken zur Bestimmung der Drehzahl herangezogen wird. Aus der ermittelten Drehzahl kann dann eine korrigierte Zeit für das Laden der Zündspule berechnet werden. Ebenso ist der Fall dargestellt, wo Schließzeitpunkt und Zündzeitpunkt ausgehend von der vorhergehenden Phasenflanke berechnet werden.FIG. 4 shows the corresponding diagrams for a 5-cylinder engine, in which a phase pulse PI1 to PI5 is assigned to each cylinder. Here, however, the additional possibility is given for the current profile of the ignition coil ZSP1 that the time between two successive trailing edges is used to determine the speed. A corrected time for charging the ignition coil can then be calculated from the determined speed. The case is also shown where the closing point and the ignition point are calculated on the basis of the preceding phase edge.

Aus den festen Rückflanken kann die Drehzahl berechnet werden und daraus eine Verzögerungszeit tVS für den Schließbeginn und eine Verzögerungszeit tVZ für den Zündzeitpunkt ermittelt werden, so daß für den Stationärbetrieb eine genauere Schließzeit und ein variabler Zündwinkel realisierbar sind.The speed can be calculated from the fixed trailing edges and a delay time t VS for the start of closing and a delay time t VZ for the ignition point can be determined therefrom, so that a more precise closing time and a variable ignition angle can be realized for stationary operation.

Wie auch im Schaubild von Figur 3 ist unten noch eine Gradeinteilung für die Umdrehung der Kurbelwelle angegeben.As in the diagram in FIG. 3, a graduation for the rotation of the crankshaft is also given below.

Claims (6)

1. Ignition and injection system for internal combustion engines, which has a Hall shutter or the like which is driven synchronously with a shaft of the engine and, at the beginning of an ignition cycle, emits a phase pulse to a computer which, taking account, if required, of further engine data, controls ignition, the Hall shutter having cutoutes which are allocated to each or each second cylinder and cause a corresponding number of phase pulses, the trailing edges of which occur by a uniform angle of rotation before the top dead centre of the respectively associated cylinder, characterised in that one of the cutoutes (2) is designed to be wider than the others (3, 4, 5) and causes the wider phase pulse (PI1) and in that the beginning of an ignition cycle is detected when a further reference mark, derived from the ring gear or from the flywheel of the crankshaft, occurs during the wider phase pulse.
2. Ignition and injection system according to Claim 1, characterised in that the ignition coil (ZPS1) is charged at the beginning of the phase pulse (PI1 to PI4) and ignition is triggered at its trailing edge (R).
3. Ignition and injection system according to either of Claims 1 or 2, characterised in that the Hall edge (R) in each case lie [sic] about 10°of camshaft rotation before the top dead centre (TDC) of the associated cylinder.
4. Ignition and injection system according to one of the preceding claims, characterised in that the speed is determined from the time interval between the occurring trailing edges (R) of the phase pulses (PI1 to PI4) and a closing time (TS) during which the ignition coil (ZPS1) is charged, which closing time is matched to the speed, is determined by the computer (13).
5. Ignition and injection system according to one of the preceding claims, characterised in that the trailing edge (R) of the phase pulses (PI1 to PI4) are [sic] used for determining the ignition instant only when starting the engine and/or when faults occur.
6. Ignition and injection system according to one of the preceding claims, characterised in that the Hall shutter (1) is used to produce an emergency ignition in the event of a defect of the pulse transmitters for speed and/or reference mark (BM).
EP87905598A 1986-10-10 1987-09-02 Ignition and injection system for internal combustion engines Expired - Lifetime EP0325587B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863634587 DE3634587A1 (en) 1986-10-10 1986-10-10 IGNITION SYSTEM FOR COMBUSTION ENGINES
DE3634587 1986-10-10

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EP0325587A1 EP0325587A1 (en) 1989-08-02
EP0325587B1 true EP0325587B1 (en) 1992-05-06

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EP87905598A Expired - Lifetime EP0325587B1 (en) 1986-10-10 1987-09-02 Ignition and injection system for internal combustion engines

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US (1) US4941446A (en)
EP (1) EP0325587B1 (en)
JP (1) JP2690315B2 (en)
DE (2) DE3634587A1 (en)
ES (1) ES2005388A6 (en)
WO (1) WO1988002817A1 (en)

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Also Published As

Publication number Publication date
JP2690315B2 (en) 1997-12-10
US4941446A (en) 1990-07-17
DE3634587A1 (en) 1988-04-14
ES2005388A6 (en) 1989-03-01
EP0325587A1 (en) 1989-08-02
JPH02500763A (en) 1990-03-15
DE3778906D1 (en) 1992-06-11
WO1988002817A1 (en) 1988-04-21

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