EP0607177A1 - Device for detecting the angular position of a rotating component. - Google Patents

Device for detecting the angular position of a rotating component.

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Publication number
EP0607177A1
EP0607177A1 EP92919479A EP92919479A EP0607177A1 EP 0607177 A1 EP0607177 A1 EP 0607177A1 EP 92919479 A EP92919479 A EP 92919479A EP 92919479 A EP92919479 A EP 92919479A EP 0607177 A1 EP0607177 A1 EP 0607177A1
Authority
EP
European Patent Office
Prior art keywords
reference mark
marks
angular
sensor
markings
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP92919479A
Other languages
German (de)
French (fr)
Other versions
EP0607177B1 (en
Inventor
Karl Ott
Erwin Schmuck
Immanuel Krauter
Joerg Fuchs
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Publication of EP0607177A1 publication Critical patent/EP0607177A1/en
Application granted granted Critical
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Classifications

    • 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
    • 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
    • F02P7/061—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 pick-up devices without mechanical contacts
    • 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
    • F02D41/0097—Electrical control of supply of combustible mixture or its constituents using means for generating speed signals

Definitions

  • the invention relates to a device for angular position detection of a rotating part according to the preamble of the main claim.
  • a device for angular position detection of a rotating part is used in particular for speed and angle information for control units in internal combustion engines, in particular ignition and fuel injection controls, in which both the speed and the angle information can be detected with a single encoder. The points in time required for the ignition and / or injection are calculated from the angle information.
  • EP 0 188 433 describes such a device in which a sensor disk connected to the crankshaft or camshaft of an internal combustion engine and having tooth-shaped angular marks evenly distributed on the circumference of is sensed by an encoder.
  • a reference mark which can be designed, for example, as a missing tooth or a larger gap between two teeth or as a half tooth, on the rotating part.
  • the transmitter which is formed as an inductive pickup, supplies a signal that is formed into a square-wave signal in a processing circuit and is evaluated in a subsequent microcomputer.
  • the reference mark is identified by successive time comparisons, the recognition then taking place when a short time is followed by a longer time and then a shorter time.
  • the known device has the disadvantage that a large number of teeth, for example 180, are provided, the determination of the number of teeth being optimized in such a way that the time intervals between similar flank edges can still be reasonably evaluated.
  • Another device for angular position detection of a rotating part is known from EP 00 13 846, an encoder disk is used which has 32-2 markings on its surface, the two missing markings again serving as reference marks.
  • This encoder disc has the disadvantage that the number of markings does not allow a fixed reference to the position of the individual cylinders if the number of cylinders is 3, 6 or 12. This means that the known encoder disk cannot be used universally.
  • the device according to the invention with the characterizing features of the main claim has the advantage over the known devices or devices that the special number of markings or teeth of the encoder disc permits a fixed relationship between the marking and position of the individual cylinders for all common numbers of cylinders and thus enables a simple evaluation. This is possible because 36 is divisible by 2, 3, 4, 6 and 12. With 8-cylinder engines, two cylinder banks are formed, the assignment therefore corresponds to that of the 4-cylinder engine.
  • FIG. 1 shows the basic structure of the encoder system including a subsequent evaluation circuit
  • FIGS. 1a and 1b show possible configurations of the encoder disk
  • FIG. 2 shows the course of the voltage over time.
  • a sensor disc 10 which has a plurality of angle marks 11 on its surface, which are designed as rectangular teeth. Furthermore, the encoder disk 10 has a reference mark gap 12, which consists of two missing angle marks.
  • the number n of the angle marks is 36-2, this number n permits particularly simple evaluation options.
  • the encoder disc 10 is connected to the crankshaft 13 of an internal combustion engine, it is also possible to design the toothed belt pulley in a suitable manner and to use it as a encoder disc.
  • the sensor disk 10 is scanned by means of a sensor 15, for example an inductive sensor or a Hall sensor, which is connected via a line 16 to an evaluation circuit 17.
  • a sensor 15 for example an inductive sensor or a Hall sensor
  • the evaluation circuit 17 there is a signal amplification and a signal processing, so that the further evaluation after an A / D conversion in the A / D converter 14 can take place in a microcomputer 18, the signal evaluation and further processing in the microcomputer being able to take place, for example, as described in EP 0 188433.
  • the evaluation circuit 17 and the microcomputer 18 are usually part of the control unit 19, they can also be constructed separately, the evaluation circuit 17 can also be omitted if the entire signal processing takes place after an analog-digital conversion in the control unit 19 itself.
  • the passing of the angular marks 11 on the sensor 15 generates an alternating voltage, the frequency of which is dependent on the speed of rotation of the encoder disk.
  • a square wave voltage U is obtained from this voltage. This voltage is plotted as a function of time t.
  • the square wave voltage U17 shows the sequence of the individual markings; As long as the reference mark, which corresponds to two missing markings, passes the sensor, no voltage is induced in it either.
  • the square-wave voltage is evaluated in the microcomputer 18 or in the control unit 19, the distances between the individual voltage pulses being determined. This can be done, for example, using the method described in EP 0 188 433, in which the time intervals between similar angle mark edges be measured. However, this can also be used to evaluate the length of time between the leading and trailing edges of the individual markings; a combination is also conceivable, the speed being determined from the time between the leading and trailing edges of one and the same mark, which in a known manner is inversely proportional to Time is while the leading edges or the trailing edges of the individual pulses are evaluated for reference mark recognition, ie their time intervals are determined.
  • the reference mark is detected particularly reliably if a plurality of time intervals of the same angle mark flanks are evaluated, that is if a reference mark is recognized when a first time t0 is significantly less than a second time t1 and this is significantly greater than a third time t2.
  • the position of the crankshaft can be determined in the control unit 19 since there is a fixed reference between the reference mark and the crankshaft position.
  • a camshaft signal N of a camshaft sensor is additionally fed to the microcomputer 18 or the control device 19, which camshaft sensor consists, for example, of one pulse per NW revolution.
  • the combination of the camshaft signal and the identified reference mark then permits unambiguous cylinder recognition, for example the TDC position of the first cylinder, and thus also the other cylinders if the cylinder sequence is fixed, the calculations required for this are carried out in the microcomputer 18 or control unit 19, this triggers 20 normal regulating or control processes via outputs.
  • the top dead center position (TDC) can be calculated for each individual cylinder. whereby in the two-cylinder after 18 voltage pulses the second cylinder is at top dead center, in the four-cylinder after 9 voltage pulses the second cylinder, after 18 voltage pulses the third, after 27 voltage pulses the fourth and after 36-2 voltage pulses the first cylinder at top dead center.
  • TDC top dead center position
  • the encoder disk shown in FIG. 1 can also be modified in such a way that a different number is selected as the number of markings or teeth, whereby it should be noted that this number n can be divided by 2, 3, 4, 5, 6 and 12 In addition to 36-2, 60-2 or 120-2 markings would also be advantageous, since such numbers of markings also permit simple evaluation.
  • the length of the reference mark gap does not have to correspond to two missing markings, but can generally correspond to a length of m markings.
  • an encoder disk with 36-2 teeth with a disk diameter of 70 mm and a disk thickness of approximately 4 mm, is particularly favorable.
  • the height and width of the markings or the spaces between the individual markings can be designed differently, for example the length of the markings can be the same as the length of the individual spaces or the spaces can be twice as long as the markings. How the individual distances are determined be depends on the respective requirements, it is particularly important that the design of the teeth or the spaces results in an optimal distribution of the voltage induced in the sensor 15.
  • a ferromagnetic disk is usually selected as the encoder disk 10, but it is also possible to use a disk made of a different material and only to produce the markings or teeth from ferromagnetic material.
  • sensor 15 is an inductive sensor; it would also be possible to use a Hall sensor instead. In order that a voltage which can be evaluated as well as possible is induced in the sensor 15, it may be necessary to use a different encoder disk 10a, the angle mark 11a preceding and / or following the reference mark 12 being beveled on the side facing the reference mark, as in FIG Figure la is shown.
  • FIG. 1b A further possibility is shown in FIG. 1b, with similar angle marks 11b, which are considerably shorter than the spaces between the marks and a reference mark 12, whose depth is less than that of the spaces between the similar angle marks, and also Combinations of the suggestions of Figure 1, la, lb possible.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

Dans un agencement de détection de la position angulaire d'une pièce rotative, la pièce rotative est constituée par un disque capteur (14) pourvu d'une pluralité de marques angulaires régulières (11) et d'une marque de référence discernable (12) formée par exemple par l'absence de deux marques angulaires (11). Le nombre de marques angulaires est égal à (n-2), où n est un nombre divisible par autant de nombres que possible, correspondant à différents nombres de cylindres, et vaut par exemple 36. La séquence de tension générée dans le capteur (15) est évaluée par l'appareil de commande (19) et une fois que la marque de référence (12) a été détectée par comparaison avec un signal de l'arbre à cames, on détecte sans erreur possible le cylindre en question. L'évaluation de la séquence de tension fournit en outre la vitesse de rotation, et les flancs prédéterminables du train d'impulsions sont utilisés afin de commander l'allumage et/ou l'injection.In an arrangement for detecting the angular position of a rotating part, the rotating part is constituted by a sensor disk (14) provided with a plurality of regular angular marks (11) and a discernible reference mark (12) formed for example by the absence of two angular marks (11). The number of angular marks is equal to (n-2), where n is a number divisible by as many numbers as possible, corresponding to different numbers of cylinders, and is for example 36. The voltage sequence generated in the sensor (15 ) is evaluated by the control unit (19) and once the reference mark (12) has been detected by comparison with a signal from the camshaft, the cylinder in question is detected without any possible error. The evaluation of the voltage sequence further provides the rotational speed, and the predeterminable edges of the pulse train are used to control ignition and/or injection.

Description

Einrichtung zur Winkellaαeerkennunσ eines rotierenden TeilsDevice for angle detection of a rotating part
Stand der TechnikState of the art
Die Erfindung geht aus von einer Einrichtung zur Winkellageerkennung eines rotierenden Teils nach der Gattung des Hauptanspruchs. Eine solche Einrichtung dient insbesondere zur Drehzahl- und Winkel¬ information für Steuergeräte in Brennkraftmaschinen, insbesondere Zünd- und Kraftstoffeinspritzsteuerungen, bei denen sowohl die Dreh¬ zahl als auch die Winkelinformation mit einem einzigen Geber erfaßt werden kann. Aus den Winkelinformationen werden die für die Zündung und/oder Einspritzung benötigten Zeitpunkte berechnet.The invention relates to a device for angular position detection of a rotating part according to the preamble of the main claim. Such a device is used in particular for speed and angle information for control units in internal combustion engines, in particular ignition and fuel injection controls, in which both the speed and the angle information can be detected with a single encoder. The points in time required for the ignition and / or injection are calculated from the angle information.
Vorrichtungen zur Winkellageerfassung eines rotierenden Teiles sind bereits bekannt, so wird beispielsweise in der EP 0 188 433 eine solche Vorrichtung beschrieben, bei der eine mit der Kurbel- oder Nockenwelle einer Brennkraftmaschine verbundene Geberscheibe, die umfangsseitig gleichmäßig verteilte, zahnförmige Winkelmarken auf¬ weist, von einem Geber abgetastet wird. Neben den Winkelmarken befindet sich noch eine Bezugsmarke, die beispielsweise als fehlender Zahn oder größerer Lücke zwischen zwei Zähnen oder auch als halber Zahn ausgebildet sein kann, auf dem rotierenden Teil. Der Geber, der als induktiver Aufnehmer aμsgebildet ist, liefert ein Signal, das in einer Aufbereitungsschaltung zu einem Rechtecksignal geformt wird und in einem nachfolgenden Mikrocomputer ausgewertet wird. Die Erkennung der Bezugsmarke erfolgt durch nacheinander ab¬ laufende Zeitvergleiche, wobei die Erkennung dann erfolgt, wenn auf eine kurze Zeit eine längere und darauf wieder eine kürzere Zeit folgt.Devices for detecting the angular position of a rotating part are already known, for example EP 0 188 433 describes such a device in which a sensor disk connected to the crankshaft or camshaft of an internal combustion engine and having tooth-shaped angular marks evenly distributed on the circumference of is sensed by an encoder. In addition to the angle marks, there is also a reference mark, which can be designed, for example, as a missing tooth or a larger gap between two teeth or as a half tooth, on the rotating part. The transmitter, which is formed as an inductive pickup, supplies a signal that is formed into a square-wave signal in a processing circuit and is evaluated in a subsequent microcomputer. The reference mark is identified by successive time comparisons, the recognition then taking place when a short time is followed by a longer time and then a shorter time.
Die bekannte Vorrichtung hat den Nachteil, daß eine Vielzahl von Zähnen, beispielsweise 180 vorgesehen sind, wobei die Festlegung der Zähnezahl so optimiert wurde, daß die Zeitintervalle zwischen gleichartigen Winkelmarkenflanken noch vernünftig auswertbar sind.The known device has the disadvantage that a large number of teeth, for example 180, are provided, the determination of the number of teeth being optimized in such a way that the time intervals between similar flank edges can still be reasonably evaluated.
Eine andere Vorrichtung zur Winkellageerfassung eines rotierenden Teils ist aus der EP 00 13 846 bekannt, dabei wird eine Geberscheibe eingesetzt, die an ihrer Oberfläche 32-2 Markierungen aufweist, wobei die beiden fehlenden Markierungen wiederum als Bezugsmarke dienen. Diese Geberscheibe hat den Nachteil, daß die Anzahl der Markierungen keinen festen Bezug zur Stellung der einzelnen Zylinder zuläßt, wenn die Zahl der Zylinder 3, 6 oder 12 beträgt. Damit kann die bekannte Geberscheibe nicht universell eingesetzt werden.Another device for angular position detection of a rotating part is known from EP 00 13 846, an encoder disk is used which has 32-2 markings on its surface, the two missing markings again serving as reference marks. This encoder disc has the disadvantage that the number of markings does not allow a fixed reference to the position of the individual cylinders if the number of cylinders is 3, 6 or 12. This means that the known encoder disk cannot be used universally.
Vorteile der ErfindungAdvantages of the invention
Die erfindungsgemäße Einrichtung mit den kennzeichnenden Merkmalen des Hauptanspruchs hat gegenüber den bekannten Vorrichtungen bzw. Einrichtungen den Vorteil, daß die spezielle Zahl der Markierungen bzw.. Zähne der Geberscheibe einen festen Bezug zwischen Markierung und Stellung der einzelnen Zylinder für alle gängigen Zylinderzahlen zul ßt und damit eine einfache Auswertung ermöglicht. Dies ist möglich, da 36 sowohl durch 2, 3, 4, 6 als auch 12 teilbar ist. Bei 8-Zylinder-Motoren werden zwei Zylinderbänke gebildet, die Zuordnung entspricht daher der des 4-Zylindermotors.The device according to the invention with the characterizing features of the main claim has the advantage over the known devices or devices that the special number of markings or teeth of the encoder disc permits a fixed relationship between the marking and position of the individual cylinders for all common numbers of cylinders and thus enables a simple evaluation. This is possible because 36 is divisible by 2, 3, 4, 6 and 12. With 8-cylinder engines, two cylinder banks are formed, the assignment therefore corresponds to that of the 4-cylinder engine.
In den Unteransprüchen sind vorteilhafte Ausgestaltungen der Geber¬ scheibe angegeben, die eine besonders einfache Auswertung ermöglichen.Advantageous refinements of the encoder disk are specified in the subclaims, which enable particularly simple evaluation.
Zeichnungdrawing
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird in der nachfolgenden Beschreibung näher erläutert. Dabei zeigt Figur 1 den grundsätzlichen Aufbau des Geber¬ systems einschließlich einer nachfolgenden Auswerteschaltung, in Figur la und lb sind mögliche Ausgestaltungen der Geberscheibe dargestellt und Figur 2 zeigt den Verlauf der Spannung über der Zeit.An embodiment of the invention is shown in the drawing and is explained in more detail in the following description. 1 shows the basic structure of the encoder system including a subsequent evaluation circuit, FIGS. 1a and 1b show possible configurations of the encoder disk and FIG. 2 shows the course of the voltage over time.
Beschreibung des AusführungsbeispielsDescription of the embodiment
In dem in Figur 1 dargestellten Ausführungsbeispiel ist eine Geber¬ scheibe 10 abgebildet, die an ihrer Oberfläche eine Vielzahl von Winkelmarken 11, die als rechteckige Zähne ausgebildet sind, auf¬ weist. Weiterhin weist die Geberscheibe 10 eine Bezugsmarkenlücke 12 auf, die aus zwei fehlenden Winkelmarken besteht.In the exemplary embodiment shown in FIG. 1, a sensor disc 10 is shown, which has a plurality of angle marks 11 on its surface, which are designed as rectangular teeth. Furthermore, the encoder disk 10 has a reference mark gap 12, which consists of two missing angle marks.
Die Zahl n der Winkelmarken beträgt beim Ausführungsbeispiel 36-2, diese Zahl n läßt besonders einfache Auswertemöglichkeiten zu.In the exemplary embodiment, the number n of the angle marks is 36-2, this number n permits particularly simple evaluation options.
Die Geberscheibe 10 ist mit der Kurbelwelle 13 einer Brennkraft¬ maschine verbunden, es ist auch möglich, die Zahnriemenscheibe geeignet auszugestalten und als Geberscheibe zu verwenden.The encoder disc 10 is connected to the crankshaft 13 of an internal combustion engine, it is also possible to design the toothed belt pulley in a suitable manner and to use it as a encoder disc.
Abgetastet wird die Geberscheibe 10 mittels eines Sensors 15, beispielsweise eines Induktivsensors oder eines Hallsensors, der über eine Leitung 16 mit einer Auswerteschaltung 17 verbunden ist. In der AuswerteSchaltung 17 erfolgt eine Signalverstärkung sowie eine Signalaufbereitung, so daß die weitere Auswertung nach einer A/D-Wandlung im A/D-Wandler 14 in einem Mikrocomputer 18 erfolgen kann, wobei die Signalauswertung sowie die Weiterverarbeitung im Mikrocomputer beispielsweise derart erfolgen kann, wie in der EP 0 188433 beschrieben wird.The sensor disk 10 is scanned by means of a sensor 15, for example an inductive sensor or a Hall sensor, which is connected via a line 16 to an evaluation circuit 17. In the evaluation circuit 17 there is a signal amplification and a signal processing, so that the further evaluation after an A / D conversion in the A / D converter 14 can take place in a microcomputer 18, the signal evaluation and further processing in the microcomputer being able to take place, for example, as described in EP 0 188433.
Die Auswerteschaltung 17 sowie der Mikrocomputer 18 sind üblicher¬ weise Bestandteil des Steuergeräts 19, sie können auch separat auf¬ gebaut sein, die AuswerteSchaltung 17 kann auch entfallen, wenn die gesamte Signalverarbeitung nach einer Analog-Digital-Wandlung im Steuergerät 19 selbst erfolgt.The evaluation circuit 17 and the microcomputer 18 are usually part of the control unit 19, they can also be constructed separately, the evaluation circuit 17 can also be omitted if the entire signal processing takes place after an analog-digital conversion in the control unit 19 itself.
Das Vorbeilaufen der Winkelmarken 11 am Sensor 15 erzeugt in diesem eine Wechselspannung, deren Frequenz abhängig von der Dreh- geschwindigkeit der Geberscheibe ist. Nach der Verarbeitung in der Auswerteschaltung 17 wird aus dieser Spannung eine Rechteckspannung U erhalten, wie sie in Figur 2 dargestellt ist. Diese Spannung ist dabei in Abhängigkeit von der Zeit t aufgetragen.The passing of the angular marks 11 on the sensor 15 generates an alternating voltage, the frequency of which is dependent on the speed of rotation of the encoder disk. After processing in the evaluation circuit 17, a square wave voltage U, as shown in FIG. 2, is obtained from this voltage. This voltage is plotted as a function of time t.
Die Rechteckspannung U17 gibt die Abfolge der einzelnen Markierungen wieder; so lange die Bezugsmarke, die zwei fehlenden Markierungen entspricht, am Sensor vorbeiläuft, wird in diesem auch keine Spannung induziert.The square wave voltage U17 shows the sequence of the individual markings; As long as the reference mark, which corresponds to two missing markings, passes the sensor, no voltage is induced in it either.
Im Mikrocomputer 18 bzw. im Steuergerät 19 erfolgt die Auswertung der Rechteckspannung, dabei werden die Abstände zwischen den einzelnen Spannungsimpulsen bestimmt, dies kann beispielsweise nach der in der EP 0 188 433 beschriebenen Methode erfolgen, bei der die zeitlichen Abstände zwischen gleichartigen Winkelmarkenflanken gemessen werden. Dies kann jedoch genauso die Zeitdauer zwischen Vorder- und Rückflanke der einzelnen Markierungen ausgewertet werden, es ist weiterhin auch eine Kombination denkbar, wobei aus der Zeit zwischen Vor- und Rückflanke ein und derselben Marke die Drehzahl bestimmt wird, die in bekannter Weise umgekehrt proportional zur Zeit ist, während zur Bezugsmarkenerkennung jeweils Vorderflanken oder jeweils die Rückflanken der einzelnen Impulse ausgewertet werden, d.h. ihre zeitliche Abstände bestimmt werden.The square-wave voltage is evaluated in the microcomputer 18 or in the control unit 19, the distances between the individual voltage pulses being determined. This can be done, for example, using the method described in EP 0 188 433, in which the time intervals between similar angle mark edges be measured. However, this can also be used to evaluate the length of time between the leading and trailing edges of the individual markings; a combination is also conceivable, the speed being determined from the time between the leading and trailing edges of one and the same mark, which in a known manner is inversely proportional to Time is while the leading edges or the trailing edges of the individual pulses are evaluated for reference mark recognition, ie their time intervals are determined.
Besonders sicher wird die Bezugsmarke erkannt, wenn mehrere zeitliche Abstände gleichartiger Winkelmarkenflanken ausgewertet werden, wenn also eine Bezugsmarke dann erkannt wird, wenn eine erste Zeit tO deutlich kleiner als eine zweite Zeit tl und diese deutlich größer als eine dritte Zeit t2 ist.The reference mark is detected particularly reliably if a plurality of time intervals of the same angle mark flanks are evaluated, that is if a reference mark is recognized when a first time t0 is significantly less than a second time t1 and this is significantly greater than a third time t2.
Nachdem die Bezugsmarke 12 erkannt ist, kann im Steuergerät 19 daraus die Stellung der Kurbelwelle ermittelt werden, da zwischen Bezugsmarke und Kurbelwellenstellung ein fester Bezug vorhanden ist.After the reference mark 12 has been recognized, the position of the crankshaft can be determined in the control unit 19 since there is a fixed reference between the reference mark and the crankshaft position.
Damit eine eindeutige Zylindererkennung möglich ist, wird dem Mikro¬ computer 18 bzw. dem Steuergerät 19 zusätzlich noch ein Nocken¬ wellensignal N eines Nockenwellensensors zugeführt, das beispiels¬ weise aus einem Impuls pro NW-Umdrehung besteht. Die Verknüpfung von Nockenwellensignal und erkannter Bezugsmarke läßt dann eine ein¬ deutige Zylindererkennung, beispielsweise der OT-Stellung des ersten Zylinders zu und damit bei festgelegter Zylinderabfolge auch der weiteren Zylinder zu, die dazu erforderlichen Berechnungen laufen im Mikrocomputer 18 bzw. Steuergerät 19 ab, dieses löst über Ausgänge 20 übliche Regel- bzw. Steuervorgänge aus.In order that clear cylinder detection is possible, a camshaft signal N of a camshaft sensor is additionally fed to the microcomputer 18 or the control device 19, which camshaft sensor consists, for example, of one pulse per NW revolution. The combination of the camshaft signal and the identified reference mark then permits unambiguous cylinder recognition, for example the TDC position of the first cylinder, and thus also the other cylinders if the cylinder sequence is fixed, the calculations required for this are carried out in the microcomputer 18 or control unit 19, this triggers 20 normal regulating or control processes via outputs.
Durch Abzählen der einzelnen Spannun simpulse läßt sich daraus die obere Totpunktstellung (OT) für jeden einzelnen Zylinder berechnen. wobei beim Zweizylinder nach 18 Spannungsimpulsen der zweite Zylinder im oberen Totpunkt steht, beim Vierzylinder ist nach 9 Spannungsimpulsen der zweite Zylinder, nach 18 Spannungsimpulsen der dritte, nach 27 Spannungsimpulsen der vierte und nach 36-2 Spannungsimpulsen wieder der erste Zylinder im oberen Totpunkt. Diese einfache Zuordnung zwischen Bezugsmarke und Stellung der einzelnen Zylinder ist möglich, da bei Verwendung von (n-2) = 36-2 Zähnen und der möglichen restlosen Teilbarkeit von n = 36 durch 2, 4, 6 und 12 eine einfache Abzahlung die jeweilige Zylinderlage liefert.By counting the individual voltage pulses, the top dead center position (TDC) can be calculated for each individual cylinder. whereby in the two-cylinder after 18 voltage pulses the second cylinder is at top dead center, in the four-cylinder after 9 voltage pulses the second cylinder, after 18 voltage pulses the third, after 27 voltage pulses the fourth and after 36-2 voltage pulses the first cylinder at top dead center. This simple assignment between the reference mark and the position of the individual cylinders is possible because when (n-2) = 36-2 teeth are used and the possible complete divisibility of n = 36 by 2, 4, 6 and 12, the respective cylinder position is simply paid off delivers.
Die in Figur 1 abgebildete Geberscheibe kann auch dahingehend modifiziert werden, daß als Zahl der Markierungen bzw. Zähne eine andere Zahl gewählt wird, wobei zu beachten ist, daß diese Zahl n durch.2, 3, 4, 5, 6 und 12 teilbar sein muß, neben 36-2 wären auch noch 60-2 oder 120-2 Markierungen vorteilhaft, da auch solche Anzahlen von Markierungen eine einfache Auswertung zulassen.The encoder disk shown in FIG. 1 can also be modified in such a way that a different number is selected as the number of markings or teeth, whereby it should be noted that this number n can be divided by 2, 3, 4, 5, 6 and 12 In addition to 36-2, 60-2 or 120-2 markings would also be advantageous, since such numbers of markings also permit simple evaluation.
Bei geeigneter Verteilung der n Markierungen über dem Umfang der Geberscheibe 10 muß die Länge der Bezugsmarkenlücke nicht gleich zwei fehlenden Markierungen entsprechen, sondern kann allgemein einer Länge von m Markierungen entsprechen.With a suitable distribution of the n markings over the circumference of the sensor disk 10, the length of the reference mark gap does not have to correspond to two missing markings, but can generally correspond to a length of m markings.
Besonders günstig ist jedoch eine Geberscheibe mit 36-2 Zähnen, bei einem Scheibendurchmesser von 70 mm und einer Scheibendicke von etwa 4 mm.However, an encoder disk with 36-2 teeth, with a disk diameter of 70 mm and a disk thickness of approximately 4 mm, is particularly favorable.
Die Höhe und Breite der Markierungen bzw. der Zwischenräume zwischen den einzelnen Markierungen kann anders gestaltet sein, es kann beispielsweise die Länge der Markierungen gleich der Länge der einzelnen Zwischenräumen sein oder die Zwischenräume doppelt so lang wie die Markierungen sein. Wie die einzelnen Abstände festgelegt werden, hängt von den jeweiligen Erfordernissen ab, es ist besonders wichtig, daß die Gestaltung der Zähne bzw. der Zwischenräume eine optimale Verteilung der im Sensor 15 induzierten Spannung ergibt.The height and width of the markings or the spaces between the individual markings can be designed differently, for example the length of the markings can be the same as the length of the individual spaces or the spaces can be twice as long as the markings. How the individual distances are determined be depends on the respective requirements, it is particularly important that the design of the teeth or the spaces results in an optimal distribution of the voltage induced in the sensor 15.
Als Geberscheibe 10 wird üblicherweise eine ferromagnetische Scheibe gewählt, es ist jedoch auch möglich, eine Scheibe aus anderem Mate¬ rial einzusetzen und nur die Markierungen bzw. Zähne aus ferromagne- tischem Material herzustellen. Der Sensor 15 ist im Ausführungsbei- spiel ein Induktivsensor, es wäre auch möglich, stattdessen einen Hallsensor einzusetzen. Damit im Sensor 15 eine möglichst gut aus¬ wertbare Spannung induziert wird, kann es erforderlich sein, eine andere Geberscheibe 10a einzusetzen, wobei die der Bezugsmarke 12 vorhergehende und/oder die nachfolgende Winkelmarke 11a auf der zur Bezugsmarke hin gerichteten Seite abgeschrägt wird, wie in Figur la abgebildet ist.A ferromagnetic disk is usually selected as the encoder disk 10, but it is also possible to use a disk made of a different material and only to produce the markings or teeth from ferromagnetic material. In the exemplary embodiment, sensor 15 is an inductive sensor; it would also be possible to use a Hall sensor instead. In order that a voltage which can be evaluated as well as possible is induced in the sensor 15, it may be necessary to use a different encoder disk 10a, the angle mark 11a preceding and / or following the reference mark 12 being beveled on the side facing the reference mark, as in FIG Figure la is shown.
Eine weitere Möglichkeit ist in Fig. lb aufgezeigt, mit gleicharti¬ gen Winkelmarken 11b, die wesentlich kürzer sind als die Zwischen¬ räume zwischen den Marken und einer Bezugsmarke 12, deren Tiefe geringer ist als die der Zwischenräume zwischen den gleichartigen Winkelmarken, außerdem sind auch Kombinationen der Vorschläge der Figur 1, la, lb möglich. A further possibility is shown in FIG. 1b, with similar angle marks 11b, which are considerably shorter than the spaces between the marks and a reference mark 12, whose depth is less than that of the spaces between the similar angle marks, and also Combinations of the suggestions of Figure 1, la, lb possible.

Claims

Ansprüche Expectations
1. Einrichtung zur Winkellageerkennung eines rotierenden Teils einer Brennkraftmaschine, das gleichmäßig über seinen Umfang verteilte Winkelmarken und wenigstens eine Bezugsmarke aufweist, mit einem Sensor, der die Winkelmarken abtastet und mit einer Aufbereitungs¬ schaltung, dadurch gekennzeichnet, daß die Zahl der Winkelmarken (11, 11a, 11b) (n-m) beträgt und n eine Zahl ist, die durch möglichst viele, den jeweiligen Zylinderzahlen entsprechende Zahlen teilbar ist.1. Device for detecting the angular position of a rotating part of an internal combustion engine, which has angular marks distributed uniformly over its circumference and at least one reference mark, with a sensor that scans the angular marks and with a processing circuit, characterized in that the number of angular marks (11, 11a, 11b) (nm) and n is a number that is divisible by as many numbers as possible corresponding to the respective number of cylinders.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Zahl n. gleich.36 und m gleich 2 ist.2. Device according to claim 1, characterized in that the number n. 36 and m is 2.
3. Einrichtung nach einem der Ansprüche 1 oder 2, dadurch gekenn¬ zeichnet, daß die Bezugsmarke (12) als verlängerter Zwischenraum zwischen zwei Winkelmarken (11, 11a, 11b) ausgebildet ist und sich über eine Länge von zwei Winkelmarken und drei Zwischenräumen erstreckt.3. Device according to one of claims 1 or 2, characterized gekenn¬ characterized in that the reference mark (12) is designed as an extended space between two angle marks (11, 11a, 11b) and extends over a length of two angle marks and three spaces.
4. Einrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die Bezugsmarke (12) weniger tief ist als die Lücken zwischen den gleichartigen Winkelmarken (11, 11a, 11b), vorzugsweise halb so tief.4. Device according to claim 3, characterized in that the reference mark (12) is less deep than the gaps between the similar angle marks (11, 11a, 11b), preferably half as deep.
5. Einrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß dem Steuergerät (19) ein Nockenwellensignal (N) zugeführt wird und Zeitmessungen zur Bezugsmarkenerkennung ablaufen. 5. Device according to one of the preceding claims, characterized in that the control device (19) is supplied with a camshaft signal (N) and time measurements for reference mark recognition take place.
6. Einrichtung nach Anspruch 4, dadurch gekennzeichnet, daß im Steuergerät (19) nach Erkennen der Bezugsmarke (12) Zählvorgänge ablaufen, wobei Flanken der Spannungsimpulse (U17) ausgewertet werden und aus der Zahl der gezählten Spannungsimpulse auf die Lage der einzelnen Zylinder geschlossen wird. 6. Device according to claim 4, characterized in that counting processes take place in the control device (19) after recognition of the reference mark (12), edges of the voltage pulses (U17) being evaluated and the position of the individual cylinders being inferred from the number of voltage pulses counted .
EP92919479A 1991-10-10 1992-09-19 Device for detecting the angular position of a rotating component Expired - Lifetime EP0607177B1 (en)

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DE4133570 1991-10-10
DE4133570A DE4133570C1 (en) 1991-10-10 1991-10-10
PCT/DE1992/000805 WO1993007449A1 (en) 1991-10-10 1992-09-19 Device for detecting the angular position of a rotating component

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EP0607177A1 true EP0607177A1 (en) 1994-07-27
EP0607177B1 EP0607177B1 (en) 1996-06-19

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EP (1) EP0607177B1 (en)
JP (1) JPH07500164A (en)
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WO (1) WO1993007449A1 (en)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3904621B2 (en) * 1995-08-29 2007-04-11 三菱電機株式会社 Crank angle sensor abnormality detection device
JP3186545B2 (en) * 1995-10-06 2001-07-11 三菱電機株式会社 4-cycle internal combustion engine controller
AU3493497A (en) * 1996-06-21 1998-01-07 Outboard Marine Corporation Method and apparatus for detecting rotational direction of two cycle engine
US5717133A (en) * 1996-11-22 1998-02-10 Chrysler Corporation Mixed sampling rate processing for misfire detection
US5736633A (en) * 1997-01-16 1998-04-07 Ford Global Technologies, Inc. Method and system for decoding of VCT/CID sensor wheel
DE19800774B4 (en) * 1998-01-12 2006-12-21 Siemens Ag Method and magnetic measuring standard for generating a reference signal and production method for such a magnetic material measure
US6229302B1 (en) * 1999-01-19 2001-05-08 Ford Global Technologies, Inc. Method of sensing rotational information of shaft with toothed wheel
US6640451B1 (en) 2000-01-28 2003-11-04 Visteon Global Technologies, Inc. System and method for sensing the angular position of a rotatable member
GB0009860D0 (en) 2000-04-25 2000-06-07 Perkins Engines Co Ltd Timing ring
US6742502B2 (en) * 2000-10-12 2004-06-01 Kabushiki Kaisha Moric Engine control method and apparatus
US6640777B2 (en) * 2000-10-12 2003-11-04 Kabushiki Kaisha Moric Method and device for controlling fuel injection in internal combustion engine
JP4270534B2 (en) 2000-10-12 2009-06-03 ヤマハモーターエレクトロニクス株式会社 Internal combustion engine load detection method, control method, ignition timing control method, and ignition timing control device
DE10063755A1 (en) * 2000-12-21 2002-07-04 Bosch Gmbh Robert Method for identifying a reference mark on a signal generating disk attached to crank or cam shaft of a combustion engine, by measurement of time between flanks of a square wave in a manner that is more reliable than existing art
US6679223B2 (en) 2001-04-20 2004-01-20 Denso Corporation Engine control system with cam sensor
JP3979161B2 (en) * 2001-04-20 2007-09-19 株式会社デンソー Engine control device
FR2827954B1 (en) * 2001-07-25 2003-09-12 Siemens Automotive Sa METHOD FOR CORRECTING THE SIGNAL OF A CAMSHAFT POSITION SENSOR
AT4801U3 (en) * 2001-08-22 2002-06-25 Avl List Gmbh METHOD AND DEVICE FOR PROVIDING A CRANK ANGLE-BASED SIGNAL PROCESS
US6745118B2 (en) * 2001-12-06 2004-06-01 Daimlerchrysler Corporation Method to improve engine synchronization performance
US7116096B2 (en) * 2003-08-13 2006-10-03 Bendix Commercial Vehicle Systems Llc Vehicle direction detection using tone ring
JP2007228774A (en) 2006-02-27 2007-09-06 Citizen Holdings Co Ltd Speed regulation device of printer and dc motor
EP2163858A1 (en) * 2008-09-16 2010-03-17 Magneti Marelli Powertrain S.p.A. A control method for determining the angular position of a drive shaft of an internal combustion engine
DE102011054933A1 (en) 2011-10-28 2013-05-02 Dspace Digital Signal Processing And Control Engineering Gmbh Method for detecting a rotation angle
DE102013210838A1 (en) * 2013-06-11 2014-12-11 Robert Bosch Gmbh Camshaft position sensor wheel and method and apparatus for determining a camshaft position

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2644646C2 (en) * 1976-10-02 1983-04-07 Robert Bosch Gmbh, 7000 Stuttgart Device for detecting one or more missing pulses in an otherwise regular pulse train
FR2446467A1 (en) * 1979-01-09 1980-08-08 Renault METHOD AND APPARATUS FOR TRACKING THE ANGULAR POSITION OF A WORKPIECE OF A ROTATION MOTION
DE3011822A1 (en) * 1980-03-27 1981-10-01 Robert Bosch Gmbh, 7000 Stuttgart SENSOR ARRANGEMENT
US4338903A (en) * 1980-09-02 1982-07-13 Motorola Inc. Electronic cylinder identification apparatus for synchronizing fuel injection
US4553427A (en) * 1983-03-08 1985-11-19 Nippondenso Co., Ltd. Rotational reference position detection apparatus
US4459968A (en) * 1983-05-27 1984-07-17 Ford Motor Company Ignition system
GB8318008D0 (en) * 1983-07-02 1983-08-03 Lucas Ind Plc Angular position detector
US4553426A (en) * 1984-05-23 1985-11-19 Motorola, Inc. Reference pulse verification circuit adaptable for engine control
DE3423664A1 (en) * 1984-06-27 1986-01-09 Robert Bosch Gmbh, 7000 Stuttgart DEVICE FOR ANGULAR POSITION DETECTION OF A ROTATING PART
US4787354A (en) * 1986-02-05 1988-11-29 Electromotive, Inc. Ignition control system for internal combustion engines with simplified crankshaft sensing and improved coil charging
USRE34183E (en) * 1986-02-05 1993-02-23 Electromotive Inc. Ignition control system for internal combustion engines with simplified crankshaft sensing and improved coil charging
US4742332A (en) * 1987-04-10 1988-05-03 General Motors Corporation Magnetic shaft angle encoder
FR2618576B1 (en) * 1987-07-24 1990-12-28 Bendix Electronics Sa DEVICE FOR TRIGGERING A PHASE EVENT WITH AN ANGULAR POSITION OF A ROTATING MEMBER AND ITS APPLICATION

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9307449A1 *

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AU2559092A (en) 1993-05-03
WO1993007449A1 (en) 1993-04-15
EP0607177B1 (en) 1996-06-19
JPH07500164A (en) 1995-01-05
ES2089559T3 (en) 1996-10-01
DE59206625D1 (en) 1996-07-25
US5497748A (en) 1996-03-12
DE4133570C1 (en) 1992-12-24

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