EP0280696B1 - Device for controlling an internal combustion engine - Google Patents

Device for controlling an internal combustion engine Download PDF

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Publication number
EP0280696B1
EP0280696B1 EP19870904848 EP87904848A EP0280696B1 EP 0280696 B1 EP0280696 B1 EP 0280696B1 EP 19870904848 EP19870904848 EP 19870904848 EP 87904848 A EP87904848 A EP 87904848A EP 0280696 B1 EP0280696 B1 EP 0280696B1
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EP
European Patent Office
Prior art keywords
perforation
combustion engine
segments
holes
recording element
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EP19870904848
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German (de)
French (fr)
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EP0280696A1 (en
Inventor
Richard Schleupen
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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
    • 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 a device according to the preamble of the main claim.
  • a device is e.g. known from US-A-4,327,687.
  • sensor systems for detecting the angular position of a shaft of the internal combustion engine, in particular the crankshaft or the camshaft.
  • Such systems are designed, for example, as segment systems in which sensor disks rotate with the shaft, the circumference of which is provided with a number of segments proportional to the number of cylinders of the internal combustion engine, ie elongated marked areas.
  • the number of segments When determining the angular position of the crankshaft, the number of segments is half the number of cylinders.
  • the number of segments When the angular position of the camshaft is detected, the number of segments is equal to the number of cylinders, since it is known that the crankshaft rotates at twice the speed of the camshaft.
  • Each segment is assigned to one (when the crankshaft is detected) two cylinders of the internal combustion engine, and each ignition process is controlled as a function of the passage of the associated segment.
  • segment systems with segments of the same size have the disadvantage that it is not possible to assign them sufficiently for a distributor-free or two-circuit (eg eight-cylinder engine) high-voltage distribution.
  • segment systems are known (e.g. from DE-B-1.209.361) in which individual segments are divided by a number of teeth and tooth gaps and the signals generated by the teeth or tooth gaps in the receiving element are fed to a control circuit.
  • the angular position of the shaft is determined by counting the passing teeth or tooth gaps. This method is complex and requires an additional counting device.
  • the device according to the invention with the characterizing features of the main claim has the advantage that it is possible to assign the ignition pulses for a distributor-free or dual-circuit high-voltage distribution with a single transmitter while maintaining the two electrical marks at the beginning and end of the segment.
  • the resulting electrical signals marks
  • FIG. 1 shows a basic illustration of an encoder disk
  • FIG. 2 shows a detail
  • FIG. 3 shows a modification of the detail according to FIG. 2
  • FIG. 4 shows a pulse diagram
  • FIG. 5 shows a circuit diagram.
  • 10 denotes an encoder disk which rotates with the crankshaft or the camshaft of an internal combustion engine.
  • the encoder disk 10 has segments 11, 12 on its circumference and gaps 13, 14 between them. If, as shown in FIG. 1, there are two segments or two gaps and the encoder disk is attached to the crankshaft of the internal combustion engine, it is suitable for devices for controlling four-cylinder engines.
  • the segments 11, 12 are of equal length and are diametrically opposed.
  • the segment 11 is shown in more detail. It has a sickle-like perforation 15 on its surface, which increases in width with increasing angle of the crankshaft.
  • the perforation 15 can consist of holes 16 with the same diameter, which are evenly distributed over the perforation 15.
  • the perforation 15 can also consist of a series of holes 17 exist, the diameter increases according to the increasing width of the perforation 15.
  • the perforation 15 can also be designed as an isosceles triangle.
  • the encoder disk 10 In the vicinity of the circumference of the encoder disc 10 there is a spatially fixed receiving element 20 which in turn is in operative connection with a control circuit 21.
  • the type of interaction between the encoder disk 10 and the receiving element 20 can be very different.
  • the encoder disk 10 can be stamped from ferromagnetic sheet metal, and an inductive transmitter is used as the receiving element 20, which already has a magnetic flux in the idle state.
  • the diameter of the pole core of the receiving element 20 should be larger than the diameter of the holes 16.
  • the receiving element 20 When the encoder disk 10 rotates clockwise, as shown in FIG. 1, the receiving element 20 first detects the leading edge of the segment 11, for example in the segment 11. The ignition process can then be triggered, for example, at the end of segment 11 at an angular position corresponding to the rear flanks of segment 11.
  • FIG. 4a shows a transfer of the rotary movement of the crankshaft ( ⁇ KW) to the revolution of the encoder disk 10 as a function of the angle of rotation ( ⁇ ) of the encoder disk.
  • FIG. 4b shows the magnetic flux ( ⁇ ⁇ ) generated in the receiving element 20 as a function of the angle of rotation ( ⁇ ) of the encoder disc 10. If the encoder disc 10 moves clockwise, a magnetic flux change is generated in the receiving element 20 on the front flank of the segment 11, ie at the angular position ⁇ 1.
  • the magnetic flux runs at the same level as the segment 11 moves past the receiving element 20 until the perforation 15 begins, consequently no voltage is induced. If the receiving element 20 reaches the perforation 15 of the segment 11, i.e. is the encoder disc 10 in the angular position ⁇ 2, the magnetic flux drops due to the increasing width of the perforation 15. When the receiving element 20 reaches the angular position ⁇ 3, the perforation 15 ends there and the magnetic flux increases again to the same height as between the angular position ⁇ 1 and ⁇ 2. If the receiving element 20 is in the angular position ⁇ 4, the rear flank of the segment 11, the magnetic flux drops completely.
  • FIG. 4c now shows the pulses generated in the receiving element 20.
  • a positive pulse is generated.
  • the receiving element 20 reaches the rear flank of the segments 11, 12, ie if the encoder disc 10 is in the angular position ⁇ 4 or ⁇ 6, a negative pulse is produced.
  • a small, approximately equally high pulse level is present in this area, ie between the angular positions ⁇ 2 and ⁇ 3.
  • This additional impulse caused by the end of the perforation 15, can now be used as a marking.
  • the transition from a positive to a negative pulse the trailing edge of segment 11 is clearly recognizable and distinguishable from other pulses.
  • the voltages generated on the flanks of the segments 11 and 12 and the perforation 15 in the receiving element 20 are fed to the two input terminals E1 and E2 of the evaluation circuit shown in the basic circuit diagram in FIG. 5 via the two Schmitt triggers of different switching thresholds.
  • An inverter 27 is connected to the input terminal E1 at which the voltage U+ is applied.
  • a non-inverting driver stage 28 is connected to the input terminal E2 at which the voltage U ⁇ is applied.
  • the output of the inverter 27 is connected to the inverting reset input of a flip-flop 29.
  • the output of driver stage 28 is connected to its inverting set input.
  • a line leads from the output Q of the flip-flop 29 to the clear enable input of a counter 30.
  • the inverting clear input of the counter 30 is connected to the output of the driver stage 28. Furthermore, the voltage U+ tapped off before the inverter 27 is present at the counter input of the counter 30. Lines lead from the two outputs of the counter 30 to the two cylinder groups of a four-cylinder engine. This circuit is used to obtain a synchronous pulse in order to enable an exact assignment of the position of the transmitter wheel to the respective rotation of the shaft already when the internal combustion engine starts. This principle of evaluation can of course be used for all engines with an even number of cylinders. With asymmetrical engines, care must be taken that the asymmetry occurs within one revolution of the crankshaft.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

The device for controlling an internal combustion engine of a vehicle comprises a sensor system with a rotary emitter disk (10) mounted on a motor shaft facing a fixed detector element (20). The periphery of the disk (10) is provided with a number of segments (11, 12) proportional to that of the engine cylinders. At least one of the segments (11, 12) comprises a row of perforations which become wider as the angle of rotation of the shaft increases. The signals generated in the detector element (20) by the perforations (15) or the segments (11, 12) are transmitted to a control circuit (21) for the ignition, injection etc. of the vehicle. This ensures precise allocation of the ignition pulses for a high-voltage distribution without a distributor, using a single emitting unit.

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einer Vorrichtung nach der Gattung des Hauptanspruchs. Eine solche Vorrichtung ist z.B. aus US-A-4.327.687 bekannt. Bei Vorrichtungen zum Steuern einer Brennkraftmaschine eines Kraftfahrzeugs, insbesondere der Zündung und dergleichen, ist es bekannt, Sensorsysteme zur Erfassung der Winkelstellung einer Welle der Brennkraftmaschine, insbesondere der Kurbelwelle oder der Nockenwelle, einzusetzen.The invention relates to a device according to the preamble of the main claim. Such a device is e.g. known from US-A-4,327,687. In devices for controlling an internal combustion engine of a motor vehicle, in particular the ignition and the like, it is known to use sensor systems for detecting the angular position of a shaft of the internal combustion engine, in particular the crankshaft or the camshaft.

Solche Systeme sind z.B. als Segmentsysteme ausgebildet, bei denen Geberscheiben mit der Welle umlaufen, die an ihrem Umfang mit einer zur Anzahl der Zylinder der Brennkraftmaschine proportionalen Anzahl von Segmenten, d.h. langgestreckten markierten Bereichen, versehen sind. Bei der Erfassung der Winkelstellung der Kurbelwelle beträgt die Anzahl der Segmente dabei die Hälfte der Zylinderzahl. Bei Erfassung der Winkelstellung der Nockenwelle ist die Anzahl der Segmente gleich der Zylinderzahl, da die Kurbelwelle bekanntlich mit der doppelten Drehzahl der Nockenwelle umläuft. Dabei ist jedes Segment einem (bei Erfassung der Kurbelwelle zwei) Zylinder (n) der Brennkraftmaschine zugeordnet, und jeder Zündungsvorgang wird in Abhängigkeit vom Vorbeilaufen des zugehörigen Segmentes gesteuert. In einem ortsfesten Aufnahmeelement wird die Vorderflanke des Segmentes erkannt, und durch geeignete Zeitsteuerung über die gesamte Segmentlänge werden die Steuervorgänge für die Brennkraftmaschine ausgelöst. Segmentsysteme mit gleich großen Segmenten haben demgegenüber den Nachteil, daß keine für eine verteilerlose oder Zweikreis- (z.B. Achtzylindermotor) Hochspannungsverteilung ausreichende Zuordnung möglich ist.Such systems are designed, for example, as segment systems in which sensor disks rotate with the shaft, the circumference of which is provided with a number of segments proportional to the number of cylinders of the internal combustion engine, ie elongated marked areas. When determining the angular position of the crankshaft, the number of segments is half the number of cylinders. When the angular position of the camshaft is detected, the number of segments is equal to the number of cylinders, since it is known that the crankshaft rotates at twice the speed of the camshaft. Each segment is assigned to one (when the crankshaft is detected) two cylinders of the internal combustion engine, and each ignition process is controlled as a function of the passage of the associated segment. The front flank of the segment is in a fixed receiving element recognized, and by appropriate time control over the entire segment length, the control processes for the internal combustion engine are triggered. In contrast, segment systems with segments of the same size have the disadvantage that it is not possible to assign them sufficiently for a distributor-free or two-circuit (eg eight-cylinder engine) high-voltage distribution.

Ferner Sind (z.B. aus DE-B-1.209.361) Segmentsysteme bekannt, bei denen einzelne Segmente durch eine Anzahl von Zähnen und Zahnlücken unterteilt sind, und die von den Zähnen bzw. Zahnlücken im Aufnahmeelement erzeugten Signale einer Steuerschaltung zugeführt werden. Dabei wird die Winkelstellung der Welle durch Auszählen der vorbeilaufenden Zähne bzw. Zahnlücken ermittelt. Dieses Verfahren ist aufwendig und erfordert eine zusätzliche Zähleinrichtung.Furthermore, segment systems are known (e.g. from DE-B-1.209.361) in which individual segments are divided by a number of teeth and tooth gaps and the signals generated by the teeth or tooth gaps in the receiving element are fed to a control circuit. The angular position of the shaft is determined by counting the passing teeth or tooth gaps. This method is complex and requires an additional counting device.

Bildet man ferner nur eine einzige Zahnlücke in einem Segment aus, so besteht die Gefahr, daß die zusätzliche Rückflanke eine zusätzliche Zündung auslöst.Furthermore, if only a single tooth gap is formed in a segment, there is a risk that the additional rear flank will trigger an additional ignition.

Bei allen hier aufgeführten Vorrichtungen sind bei Start der Brennkraftmaschine mindestens eine Umdrehung notwendig, um eine genaue Zuordnung der Markierung zu erkennen.In all of the devices listed here, at least one revolution is necessary when starting the internal combustion engine in order to recognize an exact assignment of the marking.

Vorteile der ErfindungAdvantages of the invention

Die erfindungsgemäße Vorrichtung mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, daß eine Zuordnung der Zündimpulse für eine verteilerlose oder Zweikreis-Hochspannungsverteilung mit einem einzigen Geber unter Beibehaltung der beiden elektrischen Marken am Segmentanfang und Segmentende möglich ist. Aufgrund der sich ergebenden elektrischen Signale (Marken) kann man eindeutig die Zylindergruppen bei einer verteilerlosen Hochspannungsverteilung zuordnen. Es sind dabei keine Änderungen des Profils der Segmente notwendig, so daß insbesondere bei hohen Motorabtriebsmomenten keine Risse durch Verspannungen auftreten können.The device according to the invention with the characterizing features of the main claim has the advantage that it is possible to assign the ignition pulses for a distributor-free or dual-circuit high-voltage distribution with a single transmitter while maintaining the two electrical marks at the beginning and end of the segment. On the basis of the resulting electrical signals (marks), one can clearly assign the cylinder groups in the case of a distributor-free high-voltage distribution. There are no changes to the profile of the segments necessary, so that no cracks can occur due to tension, especially at high engine output torques.

Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen der im Hauptanspruch angegebenen Vorrichtung möglich.Advantageous developments of the device specified in the main claim are possible through the measures listed in the subclaims.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen Figur 1 eine Prinzipdarstellung einer Geberscheibe, Figur 2 eine Einzelheit, Figur 3 eine Abwandlung der Einzelheit nach Figur 2, Figur 4 ein Impulsdiagramm und Figur 5 eine schaltungsgemäße Darstellung.An embodiment of the invention is shown in the drawing and explained in more detail in the following description. FIG. 1 shows a basic illustration of an encoder disk, FIG. 2 shows a detail, FIG. 3 shows a modification of the detail according to FIG. 2, FIG. 4 shows a pulse diagram, and FIG. 5 shows a circuit diagram.

Beschreibung des AusführungsbeispielsDescription of the embodiment

In Figur 1 bezeichnet 10 eine Geberscheibe, die mit der Kurbelwelle oder der Nockenwelle einer Brennkraftmaschine umläuft. Die Geberscheibe 10 weist an ihrem Umfang Segmente 11, 12 sowie dazwischenliegende Lücken 13, 14 auf. Sind wie in Figur 1 dargestellt zwei Segmente bzw. zwei Lücken vorhanden und ist die Geberscheibe an der Kurbelwelle der Brennkraftmaschine befestigt, so eignet sie sich für Vorrichtungen zum Steuern von Vierzylindermotoren. Die Segmente 11, 12 sind gleich lang ausgebildet und liegen sich diametral gegenüber.In FIG. 1, 10 denotes an encoder disk which rotates with the crankshaft or the camshaft of an internal combustion engine. The encoder disk 10 has segments 11, 12 on its circumference and gaps 13, 14 between them. If, as shown in FIG. 1, there are two segments or two gaps and the encoder disk is attached to the crankshaft of the internal combustion engine, it is suitable for devices for controlling four-cylinder engines. The segments 11, 12 are of equal length and are diametrically opposed.

In figur 2 ist das Segment 11 näher dargestellt. Es weist an seiner Oberfläche eine sichelartige Perforation 15 auf, die mit steigendem Winkel der Kurbelwelle in seiner Breite zunimmt. Die Perforation 15 kann aus Löchern 16 mit gleichem Durchmesser bestehen, die über die Perforation 15 gleichmäßig verteilt sind. Wie in Figur 3 dargestellt, kann die Perforation 15 auch aus einer Reihe von Löchern 17 bestehen, deren Durchmesser entsprechend der zunehmenden Breite der Perforation 15 zunimmt. Auch kann die Perforation 15 als ein gleichschenkliges Dreieck ausgebildet sein.In Figure 2, the segment 11 is shown in more detail. It has a sickle-like perforation 15 on its surface, which increases in width with increasing angle of the crankshaft. The perforation 15 can consist of holes 16 with the same diameter, which are evenly distributed over the perforation 15. As shown in FIG. 3, the perforation 15 can also consist of a series of holes 17 exist, the diameter increases according to the increasing width of the perforation 15. The perforation 15 can also be designed as an isosceles triangle.

In der Nähe des Umfangs der Geberscheibe 10 befindet sich ein raumfestes Aufnahmeelement 20, das seinerseits mit einer Steuerschaltung 21 in Wirkverbindung steht. Die Art der Wechselwirkung von Geberscheibe 10 und Aufnahmeelement 20 kann dabei sehr verschiedenartig sein. Bei Ausnutzung von magnetischen Wechselwirkungen kann die Geberscheibe 10 aus ferromagnetischem Blech gestanzt sein, und als Aufnahmeelement 20 wird ein Induktivgeber verwendet, der im Ruhezustand bereits einen magnetischen Fluß aufweist. Beim Ausführungsbeispiel nach Figur 2 sollte der Durchmesser des Polkerns des Aufnahmeelements 20 größer sein als der Durchmesser der Löcher 16.In the vicinity of the circumference of the encoder disc 10 there is a spatially fixed receiving element 20 which in turn is in operative connection with a control circuit 21. The type of interaction between the encoder disk 10 and the receiving element 20 can be very different. When magnetic interactions are used, the encoder disk 10 can be stamped from ferromagnetic sheet metal, and an inductive transmitter is used as the receiving element 20, which already has a magnetic flux in the idle state. In the exemplary embodiment according to FIG. 2, the diameter of the pole core of the receiving element 20 should be larger than the diameter of the holes 16.

Wenn die Geberscheibe 10, wie in Figur 1 angezeigt, im Uhrzeigersinn umläuft, wird vom Aufnahmeelement 20 zunächst - beispielsweise im Segment 11 - die Vorderflanke des Segments 11 erfaßt. Der Zündvorgang kann dann beispielsweise am Ende des Segments 11 bei einer der Rückflanken des Segments 11 entsprechenden Winkelstellung ausgelöst werden.When the encoder disk 10 rotates clockwise, as shown in FIG. 1, the receiving element 20 first detects the leading edge of the segment 11, for example in the segment 11. The ignition process can then be triggered, for example, at the end of segment 11 at an angular position corresponding to the rear flanks of segment 11.

Zur Veranschaulichung der Wirkungsweise der in Figur 1 dargestellten Vorrichtung ist in Figur 4 der zeitliche Verlauf der von den Segmenten 11, 12 bzw. von den Lücken 13, 14 und von der Perforation 15 erzeugten Signale dargestellt. Figur 4a zeigt eine Übertragung der Drehbewegung der Kurbelwelle (Δ KW) auf die Umdrehung der Geberscheibe 10 in Abhängigkeit vom Drehwinkel (α ) der Geberscheibe. In Figur 4b ist der im Aufnahmeelement 20 erzeugte magnetische Fluß (Δ Φ ) in Abhängigkeit vom Drehwinkel (α ) der Geberscheibe 10 aufgezeigt. Bewegt sich die Geberscheibe 10 im Uhrzeigersinn, so wird an der Vorderflanke des Segments 11, d.h. bei der Winkelstellung α₁, im Aufnahmeelement 20 eine magnetische Flußänderung erzeugt.To illustrate the mode of operation of the device shown in FIG. 1, the time course of the signals generated by the segments 11, 12 or by the gaps 13, 14 and by the perforation 15 is shown in FIG. FIG. 4a shows a transfer of the rotary movement of the crankshaft (Δ KW) to the revolution of the encoder disk 10 as a function of the angle of rotation (α) of the encoder disk. FIG. 4b shows the magnetic flux (Δ Φ) generated in the receiving element 20 as a function of the angle of rotation (α) of the encoder disc 10. If the encoder disc 10 moves clockwise, a magnetic flux change is generated in the receiving element 20 on the front flank of the segment 11, ie at the angular position α 1.

Der magnetische Fluß verläuft in gleicher Höhe, während sich das Segment 11 bis zum Beginn der Perforation 15 am Aufnahmeelement 20 vorbeibewegt, folglich wird keine Spannung induziert. Erreicht das Aufnahmeelement 20 die Perforation 15 des Segments 11, d.h. befindet sich die Geberscheibe 10 in Winkelstellung α₂, so fällt der magnetische Fluß aufgrund der zunehmenden Breite der Perforation 15 ab. Erreicht das Aufnahmeelement 20 die Winkelstellung α₃, so endet dort die Perforation 15 und der magnetische Fluß steigt wieder auf die gleiche Höhe, wie zwischen der Winkelstellung α ₁ und α₂ an. Befindet sich das Aufnahmeelement 20 in Winkelstellung α₄, der Rückflanke des Segments 11, so fällt der magnetische Fluß völlig ab. Durch die Perforation 15 wird sowohl eine zusätzliche Änderung des magnetischen Flusses als auch, falls die Winkelstellungen α₃ und α₄ nahe beieinander liegen, scheinbar die Änderung des magnetischen Flusses vergrößert. Während sich nun die Lücke 13 am Aufnahmeelement 20 vorbeibewegt, wird kein wesentlicher magnetischer Fluß erzeugt. Analog zum Segment 11 wird nun auch vom Segment 12 an dessen Vorderflanke als auch an der Rückflanke, d.h. bei der Winkelstellung α ₅ und α₆ eine magnetische Flußänderung erzeugt.The magnetic flux runs at the same level as the segment 11 moves past the receiving element 20 until the perforation 15 begins, consequently no voltage is induced. If the receiving element 20 reaches the perforation 15 of the segment 11, i.e. is the encoder disc 10 in the angular position α₂, the magnetic flux drops due to the increasing width of the perforation 15. When the receiving element 20 reaches the angular position α₃, the perforation 15 ends there and the magnetic flux increases again to the same height as between the angular position α ₁ and α₂. If the receiving element 20 is in the angular position α₄, the rear flank of the segment 11, the magnetic flux drops completely. Through the perforation 15, both an additional change in the magnetic flux and, if the angular positions α₃ and α liegen are close to one another, the change in the magnetic flux is apparently increased. As the gap 13 now moves past the receiving element 20, no substantial magnetic flux is generated. Analogous to segment 11, segment 12 now also applies to its leading edge and to the trailing edge, i.e. generates a magnetic flux change at the angular position α ₅ and α₆.

Figur 4c zeigt nun die im Aufnahmeelement 20 erzeugten Impulse. Jeweils an der Vorderflanke der Segmente 11, 12, d.h. bei der Winkelstellung α₁ bzw. α₅, wird ein positiver Impuls erzeugt. Ereicht das Aufnahmeelement 20 die Rückflanke der Segmente 11, 12, d.h. befindet sich die Geberscheibe 10 in der Winkelstellung α ₄ bzw. α ₆, so wird ein negativer Impuls hervorgerufen. Aufgrund der Perforation 15 im Segment 11 und des sich dadurch ändernden magnetischen Flusses ist in diesem Bereich, d.h. zwischen der Winkelstellung α₂ und α₃ ein geringes in etwa gleich hohes Impulsniveau vorhanden. Am Ende der Perforation 15, d.h. bei Winkelstellung α ₃ entsteht wieder ein positiver Impuls. Dieser zusätzliche Impuls, hervorgerufen durch das Ende der Perforation 15, kann nun als Markierung verwendet werden. Gleichzeitig wird auch durch den Übergang von einem positiven auf einen negativen Impuls die Rückflanke des Segmentes 11 deutlich erkennbar und von übrigen Impulsen unterscheidbar.Figure 4c now shows the pulses generated in the receiving element 20. In each case on the leading edge of the segments 11, 12, ie at the angular position α₁ or α₅, a positive pulse is generated. If the receiving element 20 reaches the rear flank of the segments 11, 12, ie if the encoder disc 10 is in the angular position α ₄ or α ₆, a negative pulse is produced. Because of the perforation 15 in the segment 11 and the magnetic flux thereby changing, a small, approximately equally high pulse level is present in this area, ie between the angular positions α₂ and α₃. At the end of the perforation 15, ie at the angular position α ₃, there is again a positive pulse. This additional impulse, caused by the end of the perforation 15, can now be used as a marking. At the same time, the transition from a positive to a negative pulse, the trailing edge of segment 11 is clearly recognizable and distinguishable from other pulses.

Die an den Flanken der Segmente 11 bzw. 12 und der Perforation 15 im Aufnahmeelement 20 erzeugten Spannungen werden über die zwei Schmitt-Trigger unterschiedlicher Schaltschwelle den beiden Eingangsklemmen E1 und E2 der in Figur 5 im Prinzipschaltbild dargestellten Auswerteschaltung zugeführt. An die Eingangsklemme E1, an der die Spannung U₊ anliegt, ist ein Inverter 27 angeschlossen. An die Eingangsklemme E2 an der die Spannung U₋ anliegt, ist hingegen eine nichtinvertierende Treiberstufe 28 angeschlossen. Der Ausgang des Inverters 27 ist mit dem invertierenden Reset-Eingang eines Flip-Flops 29 verbunden. An dessen invertierenden Set-Eingang ist der Ausgang der Treiberstufe 28 angeschlossen. Vom Ausgang Q des Flip-Flops 29 führt eine Leitung zum Clear-Enable-Eingang eines Zählers 30. Der invertierende Clear-Eingang des Zählers 30 ist mit dem Ausgang der Treiberstufe 28 verbunden. Ferner liegt am Zähleingang des Zählers 30 die vor dem Inverter 27 abgegriffene Spannung U₊ an. Von den beiden Ausgängen des Zählers 30 führen Leitungen zu den beiden Zylindergruppen eines Vierzylindermotors. Diese Schaltung dient zur Gewinnung eines Synchronimpulses, um bereits beim Start der Brennkraftmaschine eine genaue Zuordnung der Stellung des Geberrades zur jeweiligen Drehung der Welle zu ermöglichen. Dieses Prinzip der Auswertung ist selbstverständlich für alle Motoren mit gerader Zylinderanzahl anwendbar. Bei asymmetrischen Motoren ist darauf zu achten, daß die Asymmetrie innerhalb einer Kurbelwellenumdrehung auftritt.The voltages generated on the flanks of the segments 11 and 12 and the perforation 15 in the receiving element 20 are fed to the two input terminals E1 and E2 of the evaluation circuit shown in the basic circuit diagram in FIG. 5 via the two Schmitt triggers of different switching thresholds. An inverter 27 is connected to the input terminal E1 at which the voltage U₊ is applied. On the other hand, a non-inverting driver stage 28 is connected to the input terminal E2 at which the voltage U₋ is applied. The output of the inverter 27 is connected to the inverting reset input of a flip-flop 29. The output of driver stage 28 is connected to its inverting set input. A line leads from the output Q of the flip-flop 29 to the clear enable input of a counter 30. The inverting clear input of the counter 30 is connected to the output of the driver stage 28. Furthermore, the voltage U₊ tapped off before the inverter 27 is present at the counter input of the counter 30. Lines lead from the two outputs of the counter 30 to the two cylinder groups of a four-cylinder engine. This circuit is used to obtain a synchronous pulse in order to enable an exact assignment of the position of the transmitter wheel to the respective rotation of the shaft already when the internal combustion engine starts. This principle of evaluation can of course be used for all engines with an even number of cylinders. With asymmetrical engines, care must be taken that the asymmetry occurs within one revolution of the crankshaft.

Claims (7)

1. Device for controlling an internal-combustion engine of a motor vehicle with a sensor system, in which an emitter disc (10), rotating with a shaft of the internal-combustion engine, is in effective connection with a fixed recording element (20), which is provided at its periphery with a number of serpents (11, 12), having a steeply sloping leading edge and trailing edge and influencing the recording element (20), proportional to the number of cylinders of the internal-combustion engine and the recording element (20) is connected to a control circuit (21) for the ignition or the like of the motor vehicle, characterised in that at least one of the serpents (11, 12) has a perforation (15), the width of which increases with increasing angle of the shaft and which initiates in the recording element a signal which can be fed to the control circuit (21) and serves as marking.
2. Device according to Claim 1, characterised in that the perforation (15) comprises a plurality of holes (16).
3. Device according to Claim 2, characterised in that the diameter of the holes (16) is the same.
4. Device according to Claim 2, characterised in that the diameter of the holes (17) increases with increasing angle of the shaft and the holes (17) correspond to the respective width of the perforation (15).
5. Device according to one of Claims 1 to 4, characterised in that the recording element (20) is an inductive emitter, the pole core of which is larger than the diameter of the holes (16, 17).
6. Device according to one of Claims 1 to 5, characterised in that the perforation (15) is of a sickleshaped design.
7. Ignition system with distributorless or two-circuit high-voltage distribution, characterised in that it comprises a device according to one of Claims 1 to 6.
EP19870904848 1986-09-05 1987-08-08 Device for controlling an internal combustion engine Expired - Lifetime EP0280696B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3630272 1986-09-05
DE19863630272 DE3630272A1 (en) 1986-09-05 1986-09-05 DEVICE FOR CONTROLLING AN INTERNAL COMBUSTION ENGINE

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EP0280696A1 EP0280696A1 (en) 1988-09-07
EP0280696B1 true EP0280696B1 (en) 1991-10-16

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EP19870904848 Expired - Lifetime EP0280696B1 (en) 1986-09-05 1987-08-08 Device for controlling an internal combustion engine

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US (1) US4848298A (en)
EP (1) EP0280696B1 (en)
JP (1) JPH01500682A (en)
DE (2) DE3630272A1 (en)
WO (1) WO1988001691A1 (en)

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DE3922859A1 (en) * 1989-07-12 1991-01-24 Bosch Gmbh Robert METHOD FOR CONTROLLING FUEL MEASUREMENT IN AN INTERNAL COMBUSTION ENGINE
DE3928726A1 (en) * 1989-08-30 1991-03-07 Vogt Electronic Ag IGNITION SYSTEM WITH CURRENT-CONTROLLED SEMICONDUCTOR CIRCUIT
JP2853300B2 (en) * 1990-08-24 1999-02-03 国産電機株式会社 Cylinder discrimination signal generator for internal combustion engine
DE4039062C1 (en) * 1990-12-07 1992-06-04 Vogt Electronic Ag, 8391 Obernzell, De
JP3053254B2 (en) * 1991-05-17 2000-06-19 三信工業株式会社 Engine ignition timing adjustment device
DE19808744A1 (en) * 1998-03-02 1999-05-12 Bosch Gmbh Robert Ignition control arrangement for internal combustion engine
US6188216B1 (en) 1998-05-18 2001-02-13 Cts Corporation Low profile non-contacting position sensor
US6124709A (en) * 1998-06-05 2000-09-26 Cts Corporation Magnetic position sensor having a variable width magnet mounted into a rotating disk and a hall effect sensor
US6323641B1 (en) 1999-05-13 2001-11-27 Cts Corporation Non-contacting position sensor with helical flux linkage
US6404185B1 (en) 1999-06-01 2002-06-11 Cts Corporation Apparatus and method for sensing an angular position of a flux linkage member

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Publication number Priority date Publication date Assignee Title
DE1209361B (en) * 1962-09-18 1966-01-20 Philips Patentverwaltung Device for speed-dependent ignition timing in internal combustion engines
US3465739A (en) * 1967-10-16 1969-09-09 Phelon Co Inc Inductively triggered breakerless ignition system with automatic spark advance
DE2726132A1 (en) * 1977-06-10 1978-12-21 Bosch Gmbh Robert IC engine crankshaft angular position signal generator - using magnetic field detectors and angle dependent pole and conductor geometry
DE2923425A1 (en) * 1979-06-09 1980-12-11 Bosch Gmbh Robert IGNITION SYSTEM FOR INTERNAL COMBUSTION ENGINES
DE3131121C2 (en) * 1981-08-06 1984-11-15 Atlas Fahrzeugtechnik GmbH, 5980 Werdohl Tooth rim with a marked tooth tip
US4617906A (en) * 1983-04-05 1986-10-21 Lucas Industries, Public Limited Company Dwell control for an I.C. engine spark ignition system

Also Published As

Publication number Publication date
EP0280696A1 (en) 1988-09-07
JPH01500682A (en) 1989-03-09
DE3773901D1 (en) 1991-11-21
WO1988001691A1 (en) 1988-03-10
US4848298A (en) 1989-07-18
DE3630272A1 (en) 1988-03-17

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