EP0230560B1 - Angle sensor arrangement - Google Patents
Angle sensor arrangement Download PDFInfo
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- EP0230560B1 EP0230560B1 EP86116612A EP86116612A EP0230560B1 EP 0230560 B1 EP0230560 B1 EP 0230560B1 EP 86116612 A EP86116612 A EP 86116612A EP 86116612 A EP86116612 A EP 86116612A EP 0230560 B1 EP0230560 B1 EP 0230560B1
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- signal
- sensor
- arrangement according
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- sensors
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B1/00—Engines characterised by fuel-air mixture compression
- F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
- F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder
Definitions
- the invention relates to an encoder arrangement for detecting the angle of rotation of the crankshaft angle of an internal combustion engine according to the preamble of claim 1.
- US Pat. No. 4,181,884 describes an arrangement in which a tooth has been removed from the ring gear on the flywheel of an internal combustion engine in order to recognize the position. The absence of the tooth is detected by the fact that two sensors are arranged at an angle to one another at an angular distance of the integer multiple of the width of a tooth-gap unit and their output signals are subtracted. When the gap passes, the subtraction result differs from zero, the gap can be detected in this way.
- These and similar sensor arrangements are now used as standard in internal combustion engines in order to provide a cylinder signal for ignition timing controls which is in a fixed relationship to a predetermined position, for example the top dead center of a cylinder.
- FR-A-2 444 274 provides an example of such a technique. Although such sensor arrangements determine the position of, for example, the top dead center of a cylinder, they are not able to generate cylinder-selective signals. To do this, it is necessary to inform the following logic in some form when the work cycle of a 720 ° crankshaft angle work sequence of an engine begins.
- the object of the invention is to provide a sensor arrangement with which a reference cylinder of the internal combustion engine can be specifically assigned to a specific crankshaft angle position.
- the one sensor for detecting the marking is assigned a second sensor at a predetermined angular distance from the first sensor, and the signal of the second sensor, in comparison with the signal of the first sensor, provides information as to whether the two sensors are relative have detected a short or relatively long mark on the signal generator.
- a relatively longer mark, which is assigned to the reference signal, can thus be discriminated against by the shorter cylinder markings.
- FIG. 1 a sensor arrangement according to the prior art is shown in supervision.
- An aperture wheel 10 has markings 12, the number corresponding to the number of cylinders of the internal combustion engine.
- a sensor or sensor 14 detects the passage of the marker 12 during the rotation of the aperture wheel 10 and emits a signal during the duration of the passage.
- the sensor 14 being shown as a Hall element which detects cutouts 12 in the aperture wheel 10.
- an aperture wheel 10 is also provided which bears markings 12, each marking 12 covering an angular range ⁇ and generating a signal in passing 14 in the sensor 14, the duration of which is accordingly determined by the rotational speed of the aperture wheel 10 and the angle ⁇ .
- a marking 18 assigned to a predetermined reference cylinder differs from the other markings 12 in size. It covers an angular range that is larger by an angle ⁇ than the angle ⁇ .
- a second sensor 16 is provided, offset by an angle ⁇ to the sensor 14, which is identical in construction to the sensor 14.
- the markings are preferably provided as recesses in a with a metallic diaphragm wheel, while the sensors 14 and 16 are designed as Hall elements.
- Other pairings customary in the prior art such as openings and photocells, light sources and photocells, or phototransistors, magnets and read relays or the like can of course also be used.
- Each of the markings 12 and 18 generates a signal S1 in the sensor 14 and a signal S2 in the sensor 16.
- the signals S1 and S2 are determined in a subsequent evaluation circuit to generate the reference signal, which should only occur when the marker 18 passes by.
- FIG. 4 shows a first simple evaluation circuit in which the signal S1 from the sensor 14 is fed to an input 20 and the signal S2 from the sensor 16 is fed to an input 22.
- the signal 20 is tapped again at the output 24 and is used there as a speed signal, for example in order to be able to derive emergency running properties of the internal combustion engine. Since the signal S1 does not pass through any active components, a failure of the evaluation circuit does not affect the presence of the emergency operation signal.
- the evaluation circuit is essentially formed by an AND gate 28, which detects when both the signal S1 and the signal S2 are present, and in this phase a reference signal is generated at the output 26.
- the signals derived in FIG. 5 are based on an aperture wheel 10, the recess ⁇ of which corresponds to an angle of rotation of 30 ° of the camshaft and the angle ⁇ of which corresponds to an angle of 45 ° camshaft.
- the signal S1 shown in FIG. 5a is fed to the one input of the NAND gate 28, the signal S2 shown in FIG. 5b is identical to the signal S1 in FIG. 5a with regard to its signal sequence, but out of phase by the angle ⁇ .
- the coordination of the angles ⁇ , ⁇ and ⁇ is such that only when the wider marking 18 passes the sensors 14 and 16 both sensors 14 and 16 simultaneously pick up a signal, as a result of which a signal occurs at the output of the NAND gate 28, which after renewed negation, can be tapped at the output as reference signal 26 and is correspondingly shown in FIG. 5c.
- FIG. 6 shows a further embodiment of the evaluation circuit which is used to convert the reference double pulse shown in FIG. 5c into a unique reference pulse.
- the signal S1 of the encoder 14 is applied to the input 20 of the circuit, the signal S2 of the encoder 18 to the input 22. As in the circuit according to FIG. 4, the signal at the input 20 is simultaneously present at the output 24 as a speed signal.
- the signal from input 20 is set to the trigger input of a D flip-flop 30, which occurs every time the rear Edge of a marker 12 or 18 runs past the sensor 14, is triggered and thus the Q output of the D flip-flop only switches to the "high” state if, at the time of the positive trigger edge, the data input previously Had “low” status.
- a pulse sequence thus arises at the output of the flip-flop, which changes to the "high” state only once per revolution of the diaphragm wheel encoder 10, specifically at the end of the slot C when its rear flank passes the sensor 14.
- the speed signal tapped at the output 24 has a different width depending on the width of the markings 12 and 18, and thus an uneven duty cycle, since it is the simple connection of the signal S1 from the encoder 14.
- Fig. 8 shows another evaluation circuit in which the speed signal has the same duty cycle if the angle ⁇ between the two sensors 14 and 16 is chosen equal to the angular width ⁇ of the markings A, B, D.
- an input 20 and an input 22 are provided, to which the signals S1 and S2 of the sensors 14 and 16 are fed, the reference signal is tapped at the output of the circuit 26, the speed signal at the output 24.
- a D flip-flop 36 is provided in the circuit, at the reset input of which signal S1 from input 20 is applied.
- the D input of the flip-flop 36 receives the negated signal S1, and the clock input of the flip-flop 36 is supplied with the output signal of a NAND gate 34, at whose one input the negated signal S1 tapped at the gate 32 is present and on whose other input the signal S2 is present.
- the output of this NAND gate 34 simultaneously provides the desired speed signal n at the output 24 of the evaluation circuit.
- the signal S1 is from the sensor 14
- the signal S2 is from the sensor 16 shown.
- 9c shows the signal present at the data input of the flip-flop 36, which is the negated signal from S1, that is S1 is. Since the signal from FIG. 9b and the signal from FIG. 9c are respectively fed to the NAND gate 34 at the inputs, the signal in FIG. 9d is the signal present at the output of the NAND gate 34, which can be used as a speed signal , the clock ratio of the signal according to FIG. 9d being constant.
- the inverted signal S1 is "low", so that the flip-flop 36 is not set by this signal when the clock input is activated.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Electromagnetism (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
- Electrical Control Of Ignition Timing (AREA)
- Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)
Description
Die Erfindung betrifft eine Geberanordnung zur Drehwinkelerkennung des Kurbelwellenwinkels einer Brennkraftmaschine gemäß Oberbegriff des Anspruchs 1.The invention relates to an encoder arrangement for detecting the angle of rotation of the crankshaft angle of an internal combustion engine according to the preamble of claim 1.
Die US-A 4 181 884 beschreibt eine Anordnung, bei dem aus dem Zahnkranz an der Schwungscheibe einer Brennkraftmaschine zur Erkennung der Stellung ein Zahn entfernt wurde. Das Fehlen des Zahnes wird dadurch erfaßt, daß zwei Sensoren winklig zueinander im Winkelabstand des ganzzahligen Vielfachen der Breite einer Zahn-Lücken-Einheit angeordnet sind und ihre Ausgangssignale subtrahiert werden. Bei Vorbeilauf der Lücke ist das Subtraktionsergebnis von Null verschieden, die Lücke kann auf diese Weise erfaßt werden. Diese und ähnliche Geberanordnungen werden heute in Brennkraftmaschinen serienmäßig verwendet, um für Zündzeitpunktsteuerungen oder -regelungen ein Zylindersignal zu liefern, das in fester Beziehung zu einer vorgegebenen Stellung, beispielsweise dem oberen Totpunkt eines Zylinders, steht.US Pat. No. 4,181,884 describes an arrangement in which a tooth has been removed from the ring gear on the flywheel of an internal combustion engine in order to recognize the position. The absence of the tooth is detected by the fact that two sensors are arranged at an angle to one another at an angular distance of the integer multiple of the width of a tooth-gap unit and their output signals are subtracted. When the gap passes, the subtraction result differs from zero, the gap can be detected in this way. These and similar sensor arrangements are now used as standard in internal combustion engines in order to provide a cylinder signal for ignition timing controls which is in a fixed relationship to a predetermined position, for example the top dead center of a cylinder.
Andere Möglichkeiten bestehen darin, derartige Signale durch eine am Verteiler vorgesehene Blende zu erzeugen, die Ausschnitte trägt, die mit Hilfe eines Hall-Elementes erfaßt werden. Auch andere Geberelemente wie Fotozellen, Reedrelais oder ähnliches sind möglich. Ein Beispiel für eine derartige Technik liefert die FR-A-2 444 274. Derartige Geberanordnungen legen zwar die Stellung beispielsweise des oberen Totpunktes eines Zylinders fest, sie sind jedoch nicht in der Lage zylinderselektive Signale zu erzeugen. Dazu ist es notwendig, der nachfolgenden Logik in irgendeiner Form mitzuteilen, wann der Arbeitstakt einer 720° Kurbelwellenwinkel dauernden Arbeitsabfolge eines Motors beginnt.Other possibilities are to generate such signals by means of an aperture provided on the distributor, which has cutouts which are detected with the aid of a Hall element. Other encoder elements such as photocells, reed relays or the like are also possible. FR-A-2 444 274 provides an example of such a technique. Although such sensor arrangements determine the position of, for example, the top dead center of a cylinder, they are not able to generate cylinder-selective signals. To do this, it is necessary to inform the following logic in some form when the work cycle of a 720 ° crankshaft angle work sequence of an engine begins.
Aufgabe der Erfindung ist es, eine Geberanordnung zu schaffen, mit der ein Referenzzylinder der Brennkraftmaschine gezielt einer bestimmten Kurbelwellenwinkelstellung zugeordnet werden kann.The object of the invention is to provide a sensor arrangement with which a reference cylinder of the internal combustion engine can be specifically assigned to a specific crankshaft angle position.
Die Aufgabe wird gelöst durch den Hauptanspruch.The task is solved by the main claim.
Erfindungsgemäß ist vorgesehen, daß dem einen Sensor zur Erfassung der Markierung noch ein zweiter Sensor im vorgegebenen Winkelabstand zum ersten Sensor zugeordnet wird, und das Signal des zweiten Sensors gibt im Vergleich mit dem Signal des ersten Sensors eine Auskunft darüber, ob die beiden Sensoren eine relativ kurze oder relativ längere Markierung auf dem Signalgeber erfaßt haben. Somit kann eine relativ längere Markierung, die dem Referenzsignal zugeordnet wird, von den kürzeren Zylindermarkierungen diskriminiert werden.According to the invention it is provided that the one sensor for detecting the marking is assigned a second sensor at a predetermined angular distance from the first sensor, and the signal of the second sensor, in comparison with the signal of the first sensor, provides information as to whether the two sensors are relative have detected a short or relatively long mark on the signal generator. A relatively longer mark, which is assigned to the reference signal, can thus be discriminated against by the shorter cylinder markings.
Bevorzugte Ausführungsformen sind in den Unteransprüchen beschrieben. Die einzelnen Vorteile dieser jeweiligen Ausführungsformen wird in Verbindung mit den zugehörigen Zeichnungen detailliert dargestellt.Preferred embodiments are described in the subclaims. The individual advantages of these respective embodiments are shown in detail in conjunction with the associated drawings.
Im folgenden wird die Erfindung anhand der Zeichnungen näher dargestellt. Es zeigen:
- Fig. 1 die Darstellung eines Gebers gemäß Stand der Technik in Aufsicht;
- Fig. 2 die Vorrichtung nach Fig. 1 in Seitenansicht;
- Fig. 3 die erfindungsgemäße Geberanordnung in Aufsicht;
- Fig. 4 eine erste Auswerteschaltung zur Signalverarbeitung;
- Fig. 5 eine Darstellung der in der Schaltung nach Fig. 4 auftretenden Signale;
- Fig. 6 eine zweite Ausführungsform der Auswerteschaltung;
- Fig. 7 eine Darstellung der in der Schaltung nach Fig. 6 auftretenden Signale;
- Fig. 8 eine dritte Ausführungsform der Auswerteschaltung; und
- Fig. 9 die in der Auswerteschaltung nach Fig. 8 auftretenden Signale.
- Figure 1 shows the representation of a sensor according to the prior art in supervision.
- Fig. 2 shows the device of Figure 1 in side view.
- 3 shows the sensor arrangement according to the invention in supervision;
- 4 shows a first evaluation circuit for signal processing;
- Fig. 5 is an illustration of the signals appearing in the circuit of Fig. 4;
- 6 shows a second embodiment of the evaluation circuit;
- Fig. 7 is an illustration of the signals appearing in the circuit of Fig. 6;
- 8 shows a third embodiment of the evaluation circuit; and
- 9 shows the signals occurring in the evaluation circuit according to FIG. 8.
In Fig. 1 ist eine Geberanordnung gemäß Stand der Technik in Aufsicht gezeigt. Ein Blendenrad 10 besitzt Markierungen 12, wobei die Anzahl der Anzahl der Zylinder der Brennkraftmaschine entspricht. Ein Sensor oder Geber 14 erfaßt während der Umdrehung des Blendenrades 10 das Vorbeilaufen der Markierung 12 und gibt während der Dauer des Vorbeilaufes ein Signal ab.In Fig. 1, a sensor arrangement according to the prior art is shown in supervision. An
In Fig. 2 ist die Seitenansicht eines derartigen Aufbaus gezeigt, dabei ist der Sensor 14 als Hall-Element dargestellt, das Aussparungen 12 im Blendenrad 10 erfaßt.2 shows the side view of such a construction, the
Bei dieser Anordnung ist es nicht möglich, die Zuordnung zwischen der Markierung 12 und dem zugehörigen Zylinder der Brennkraftmaschine eindeutig festzustellen.With this arrangement, it is not possible to unequivocally determine the association between the marking 12 and the associated cylinder of the internal combustion engine.
Zur Erfassung eines vorgegebenen Referenzzylinders ist der in Fig. 3 dargestellte Aufbau vorgesehen, bei dem eine der Markierungen sich von den anderen Markierungen unterscheidet, um dadurch ein Referenzsignal zu erzeugen.3, in which one of the markings differs from the other markings in order to thereby generate a reference signal.
Erfindungsgemäß ist ebenfalls ein Blendenrad 10 vorgesehen, das Markierungen 12 trägt, wobei jede Markierung 12 einen Winkelbereich γ überdeckt und im Vorbeilauf in dem Sensor 14 ein Signal erzeugt, dessen Dauer sich dementsprechend aus der Umdrehungsgeschwindigkeit des Blendenrades 10 und der Winkel γ bestimmt.According to the invention, an
Eine einem vorbestimmten Referrenzzylinder zugeordnete Markierung 18 unterscheidet sich von den übrigen Markierungen 12 durch die Größe. Sie überdeckt einen Winkelbereich, der um einen Winkel α größer ist als der Winkel γ.A marking 18 assigned to a predetermined reference cylinder differs from the
Weiterhin ist, um einen Winkel β zum Sensor 14 versetzt, ein zweiter Sensor 16 vorgesehen, der im Aufbau identisch dem Sensor 14 ist.Furthermore, a
Wie in den Fig. 1 und 2 dargestellt, sind vorzugsweise die Markierungen als Aussparungen in einem mit metallischen Blendenrad vorgesehen, während die Sensoren 14 und 16 als Hall-Elemente ausgeführt sind. Andere im Stand der Technik übliche Paarungen, wie Durchbrüche und Fotozellen, Lichtquellen und Fotozellen, bzw. Fototransistoren, Magnete und Readrelais oder ähnliches können selbstverständlich ebenfalls Verwendung finden.As shown in FIGS. 1 and 2, the markings are preferably provided as recesses in a with a metallic diaphragm wheel, while the
Jede der Markierungen 12 bzw. 18 erzeugt in dem Sensor 14 ein Signal S1, und in dem Sensor 16 ein Signal S2. Die Signale S1 bzw. S2 werden in einer nachfolgenden Auswerteschaltung dazu bestimmt, das Referenzsignal, das immer nur bei dem Vorbeilauf der Markierung 18 auftreten soll, zu erzeugen.Each of the
Die zugehörigen Auswerteschaltungen sowie der Signalverlauf in den Auswerteschaltungen werden unter Bezugnahme auf die folgenden Figuren beschrieben. Aus den Signalabläufen ergeben sich gleichzeitig die Anforderungen, die an die Größenordnungen der Winkel α, β und γ zu stellen sind.The associated evaluation circuits and the signal curve in the evaluation circuits are described with reference to the following figures. The signal sequences also result in the requirements that have to be placed on the magnitudes of the angles α, β and γ.
Fig. 4 zeigt eine erste einfache Auswertschaltung, in der das Signal S1 vom Sensor 14 einem Eingang 20 und das Signal S2 vom Sensor 16 einem Eingang 22 zugeführt wird. Das Signal 20 wird gleichzeitig am Ausgang 24 wieder abgegriffen und dient dort als Drehzahlsignal, beispielsweise, um Notlaufeigenschaften der Brennkraftmaschine ableiten zu können. Da das Signal S1 keine aktiven Bauelemente durchläuft, beeinträchtig einen Ausfall der Auswerteschaltung das Vorhandensein des Notlaufsignales nicht.4 shows a first simple evaluation circuit in which the signal S1 from the
Die Auswertschaltung wird im wesentlichen gebildet durch ein Und-Gatter 28, das erfaßt, wann sowohl das Signal S1 als auch das Signal S2 anliegen, und in dieser Phase wird ein Referenzsignal am Ausgang 26 erzeugt.The evaluation circuit is essentially formed by an
Zum Verständnis der Schaltungen ist notwendig, darauf hinzuweisen, daß die Schaltungen in negativer Logik ausgelegt sind, so daß das Anliegen eines Signales durch den Zustand "low" repräsentiert wird.To understand the circuits, it is necessary to point out that the circuits are designed in negative logic, so that the presence of a signal is represented by the "low" state.
Die in Fig. 5 abgeleiteten Signale beruhen auf einem Blendenrad 10, dessen Aussparung α einem Drehwinkel von 30° der Nockenwelle entspricht und dessen Winkel β einen Winkel von 45° Nockenwelle entspricht.The signals derived in FIG. 5 are based on an
Das in Fig. 5a dargestellte Signal S1 wird dem einen Eingang des NAND-Gatters 28 zugeführt, das in Fig. 5b dargestellte Signal S2 ist identisch mit dem Signal S1 in Fig. 5a im Hinblick auf seine Signalabfolge, jedoch phasenversetzt um den Winkel β. Die Abstimmungen der Winkel α, β und γ ist so, daß nur bei Vorbeilauf der breiteren Markierung 18 an den Sensoren 14 und 16 beide Sensoren 14 und 16 gleichzeitig ein Signal abgreifen, wodurch am Ausgang des NAND-Gatters 28 ein Signal auftritt, was, nach erneuter Negierung, als Referenzsignal 26 am Ausgang abgreifbar ist und in Fig. 5c entsprechend dargestellt ist.The signal S1 shown in FIG. 5a is fed to the one input of the
Fig. 6 zeigt eine weitere Ausführungsmöglichkeit der Auswerteschaltung, die verwendet wird, um den in Fig. 5c dargestellten Referenzdoppelimpuls in einen eindeutigen Referenzimpuls umzusetzen.FIG. 6 shows a further embodiment of the evaluation circuit which is used to convert the reference double pulse shown in FIG. 5c into a unique reference pulse.
Das Signal S1 des Gebers 14 wird an den Eingang 20 der Schaltung gelegt, das Signal S2 des Gebers 18 an den Eingang 22. Wie bei der Schaltung nach Fig. 4 liegt das Signal am Eingang 20 gleichzeitig am Ausgang 24 als Drehzahlsignal an.The signal S1 of the
Gleichzeitig wird das Signal vom Eingang 20 auf den Trigger-Eingang eines D-Flip-Flops 30 gesetzt, das jedesmal, wenn die rückwärtige Kante einer Markierung 12 bzw. 18 an dem Sensor 14 vorbeiläuft, getriggert wird und damit der Q-Ausgang des D-Flip-Flops nur dann in den Zustand "high" schaltet, wenn zu der Zeit der positiven Trigger-Flanke der Dateneingang vorher den Zustand "low" hatte. Somit entsteht am Ausgang des Flip-Flops eine Impulsfolge, die nur einmal pro Umdrehung des Blendenradgebers 10 in den Zustand "high" übergeht, und zwar genau am Ende des Schlitzes C, wenn dessen rückwärtige Flanke den Sensor 14 passiert.At the same time, the signal from
Das am Ausgang 24 abgegriffene Drehzahlsignal hat, da es die einfache Durchschaltung des Signales S1 vom Geber 14 ist, unterschiedliche, von der Breite der Markierungen 12 bzw. 18 abhängige Breite und somit ein ungleiches Tastverhältnis.The speed signal tapped at the
Fig. 8 zeigt eine andere Auswerteschaltung bei der das Drehzahlsignal gleiches Tastverhältnis, wenn der Winkel β zwischen den beiden Sensoren 14 bzw. 16 gleich der Winkelbreite γ der Markierungen A, B, D gewählt wird, besitzt.Fig. 8 shows another evaluation circuit in which the speed signal has the same duty cycle if the angle β between the two
Wiederum ist ein Eingang 20 und eine Eingang 22 vorgesehen, dem die Signale S1 und S2 der Sensoren 14 und 16 zugeführt werden, das Referenzsignal wird am Ausgang der Schaltung 26 abgegriffen, das Drehzahlsignal am Ausgang 24.Again, an
Es ist in der Schaltung ein D-Flip-Flop 36 vorgesehen, an dessen Reset-Eingang das Signal S1 vom Eingang 20 gelegt wird. Der D-Eingang des Flip-Flops 36 erhält das negierte Signal S1, und dem Clock-Eingang des Flip-Flops 36 wird das Ausgangssignal eines NAND-Gatters 34 zugeführt, an dessen einen Eingang das am Gatter 32 abgegriffene negierte Signal S1 anliegt und an dessen anderen Eingang das Signal S2 anliegt. Der Ausgang dieses NAND-Gatters 34 liefert gleichzeitig am Ausgang 24 der Auswerteschaltung das gewünschte Drehzahlsignal n.A D flip-
Die Funktion der Schaltung ist folgende: In Fig. 9a ist das Signal S1 vom Sensor 14, in Fig. 9b ist das Signal S2 vom Sensor 16 dargestellt. Fig. 9c zeigt das am Dateneingang des Flip-Flops 36 anstehende Signal, das das negierte Signal von S1, also
Zu den dargestellten Zeitpunkten t1, t2, t5 und t6 ist das invertierte Signal S1 "low", so daß das Flip-Flop 36 durch dieses Signal bei der Ansteuerung des Clock-Einganges nicht gesetzt wird.At the represented times t1, t2, t5 and t6, the inverted signal S1 is "low", so that the flip-
Zum Zeitpunkt t3 ist durch die Schlitzverbreiterung α das Signal
Claims (9)
a) a signal transmitter (10)
b) marks (A, B, C, D) which are assigned to the signal transmitter (10) and the number of which is matched to the number of cylinders, and by means of which a signal can be generated during a specific crankshaft angular range, one of the marks (C) covering a relatively larger crankshaft angular range than the remaining marks,
c) a first sensor (14) for interrogating the marks (A, B, C, D),
d) a second sensor (16) which is arranged at a defined angular distance (α) in respect of the angle of rotation of the signal transmitter (10) in relation to the first sensor (14),
e) an evaluation circuit (28; 30; 32, 34, 36), to which the signal sensors (S₁, S₂) are fed and which emits signals (n,Ref.) to the sensors (14, 18) during the passing by of the marks (A, B, C, D), characterized in that
f) the signal transmitter (10) runs at half the speed of rotation of the crankshaft,
g) a reference mark (C) is assigned to a reference cylinder,
h) the reference mark (C) is the mark with the greater angular range (α),
i) the angular distance (β) between the two sensors (14, 18) is smaller than the angular distance between two marks (A, B, D) minus the angle (γ) of a cylinder mark, and
j) the angular range of the reference mark (a + γ) is greater than the angular distance (β) of the sensors (14, 18).
8, Transmitter arrangement according to one of Claims 1 or 2, characterized in that the evaluation circuit emits a reference signal if the signal of the first sensor (14) has a predetermined logical value, the rear edge of the signal of the second sensor (16) triggering the evaluation circuit to emit a reference signal.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19863602292 DE3602292A1 (en) | 1986-01-25 | 1986-01-25 | TRANSMITTER ARRANGEMENT |
DE3602292 | 1986-01-25 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0230560A2 EP0230560A2 (en) | 1987-08-05 |
EP0230560A3 EP0230560A3 (en) | 1987-11-11 |
EP0230560B1 true EP0230560B1 (en) | 1991-01-16 |
Family
ID=6292660
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86116612A Expired - Lifetime EP0230560B1 (en) | 1986-01-25 | 1986-11-28 | Angle sensor arrangement |
Country Status (5)
Country | Link |
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US (1) | US4783627A (en) |
EP (1) | EP0230560B1 (en) |
JP (1) | JPS62190408A (en) |
DE (2) | DE3602292A1 (en) |
ES (1) | ES2019580B3 (en) |
Families Citing this family (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3634587A1 (en) * | 1986-10-10 | 1988-04-14 | Bosch Gmbh Robert | IGNITION SYSTEM FOR COMBUSTION ENGINES |
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DE3220896A1 (en) * | 1982-06-03 | 1983-12-08 | Robert Bosch Gmbh, 7000 Stuttgart | SENSOR |
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JPS59226232A (en) * | 1983-06-06 | 1984-12-19 | Nippon Denso Co Ltd | Apparatus for detecting rotational position of internal- combustion engine |
-
1986
- 1986-01-25 DE DE19863602292 patent/DE3602292A1/en active Granted
- 1986-11-28 DE DE8686116612T patent/DE3676990D1/en not_active Revoked
- 1986-11-28 EP EP86116612A patent/EP0230560B1/en not_active Expired - Lifetime
- 1986-11-28 ES ES86116612T patent/ES2019580B3/en not_active Expired - Lifetime
-
1987
- 1987-01-26 JP JP62017124A patent/JPS62190408A/en active Pending
- 1987-01-27 US US07/006,998 patent/US4783627A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE3602292C2 (en) | 1990-08-30 |
EP0230560A3 (en) | 1987-11-11 |
ES2019580B3 (en) | 1991-07-01 |
DE3676990D1 (en) | 1991-02-21 |
EP0230560A2 (en) | 1987-08-05 |
JPS62190408A (en) | 1987-08-20 |
DE3602292A1 (en) | 1987-08-06 |
US4783627A (en) | 1988-11-08 |
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