EP0129776A1 - Control device for an internal combustion engine - Google Patents

Control device for an internal combustion engine Download PDF

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Publication number
EP0129776A1
EP0129776A1 EP84106741A EP84106741A EP0129776A1 EP 0129776 A1 EP0129776 A1 EP 0129776A1 EP 84106741 A EP84106741 A EP 84106741A EP 84106741 A EP84106741 A EP 84106741A EP 0129776 A1 EP0129776 A1 EP 0129776A1
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EP
European Patent Office
Prior art keywords
speed
engine
rotation
control rod
pulse generator
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Granted
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EP84106741A
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German (de)
French (fr)
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EP0129776B1 (en
Inventor
Hans Dipl.-Ing. Schreiber
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Siemens AG
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Siemens AG
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Priority to AT84106741T priority Critical patent/ATE29765T1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/0097—Electrical control of supply of combustible mixture or its constituents using means for generating speed signals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D31/00—Use of speed-sensing governors to control combustion engines, not otherwise provided for
    • F02D31/001—Electric control of rotation speed
    • F02D31/007—Electric control of rotation speed controlling fuel supply
    • 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
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • 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
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
    • F02D2041/1413—Controller structures or design
    • F02D2041/1432—Controller structures or design the system including a filter, e.g. a low pass or high pass filter

Definitions

  • the invention relates to a method for determining the position of a control rod on an injection pump for internal combustion engines, in order to compare the current position with a predetermined target value in a control circuit and to adjust the position of the control rod to the target value in the event of deviations as a result of changed load on the engine, the position of the control rod being the Throughput of the injection pump and thus the instantaneous injection quantity and the speed of the engine are determined and can be changed by means of stepper motors, so that even when the load on the engine changes, the speed of the engine is within a defined speed range, with a tooth pulse generator for recording the speed of the engine on a rotating crankshaft emits a speed-dependent signal sequence.
  • the actuator there is a control rod which is controlled by a controller, for example a microcomputer.
  • This microcomputer can receive different signals that are representative of different engine conditions. At its output, it emits a signal that changes the position of the control rod on the injection pump using stepper motors.
  • the starting position of the stepper motor must be known exactly before activation. Therefore, springs are provided which move the stepper motor back to its starting position in the de-energized state. It can also a switch can be provided which stops the stepper motor in its initial position. If a fixed starting position of the stepper motor is known, the microcomputer calculates the position of the control rod and thus the injection quantity at all times, since the stepper motor always executes the same countable steps. Such information about the current injection quantity is required for the engine control.
  • the invention has for its object to determine the starting position of the stepper motor precisely and to dispense with the use of mechanical components such as springs or additional switches.
  • a calibration point for the position of the control rod is determined by determining the position for a specific injection quantity.
  • a Tooth pulse generator measures the time course of the engine speed, from which one obtains a measure of the instantaneous load on the engine. If additional consumers, such as the alternator, are switched on, the engine speed between two injection points drops more than with a lower load on the engine. In order to keep the average speed constant, the injection quantity is changed depending on the load, so that the load is a measure of the current injection quantity. With a known load, this is clearly related to the position of the control rod.
  • the advantage of the method according to the invention is that a calibration point is determined by a single determination of the load by means of a speed measurement.
  • the associated position of the control rod is known for a specific injection quantity.
  • the steps of the stepper motor are the same size and countable. Furthermore, the change in the injection quantity due to a step of the stepping motor is known. Starting from the calibration point, all steps of the stepper motor are registered in the microcomputer. From the injection quantity of the calibration point and the number of steps of the stepper motor, the current injection quantity is to be determined at every point in time.
  • a device for carrying out the method according to the invention obtains the required time course of the speed by means of a tooth pulse generator. This feeds speed-dependent output signals to a phase locked loop (PLL), a phase discriminator and a low-pass filter being connected in series and a voltage-controlled oscillator being arranged between the output of the low-pass filter and an input of the phase discriminator. The input voltage of the voltage-controlled oscillator is then an image of the time course of the speed.
  • PLL phase locked loop
  • the speed can be regulated in idle mode so that it cannot fall below a minimum value and cannot exceed a maximum value.
  • the previously determined extreme values for the speed are continuously compared in an idle control loop of the microcomputer with the current speed value. If the speed falls below the minimum value, the injection quantity is increased. If the engine speed exceeds the maximum value, the injection quantity is reduced.
  • the method according to the invention has the advantage that not only the change in the injection quantity, but also the absolute value of the injection quantity is known at all times, without the position of the control rod having to be determined by additional measuring devices at the start of operation. A mechanical continuation of the control rod into an idle position - after switching off the engine - can also be omitted.
  • Markings are on a rotating disk 1 according to FIG. 1, which is connected to the crankshaft of an engine molded on elements 2.
  • a tooth pulse generator 3 registers the marking elements 2 and sends out a signal sequence.
  • an evaluation circuit 4 generates a speed-modulated signal S which is fed to a phase discriminator 61 in a phase locked loop (PLL) 6.
  • a low-pass filter 62 is connected in series with the phase discriminator 61.
  • a voltage controlled oscillator 63 is connected between the output of the low pass 62 and an input of the phase discriminator 61. The input voltage of the voltage-controlled oscillator 63 is then an image of the time profile of the speed n of the rotating disc 1, as shown in FIGS. 3 and 4.
  • Time t is plotted there on the abscissa and speed n is plotted on the ordinate.
  • speed n decreases less due to friction losses between two injection times 7 and 8 - FIG. 3 - than at high engine loads; see Fig. 4.
  • the idle control loop 91 decreases the amount of injection in an engine 10 by moving a quantity actuator over a control rod 11 when the speed reaches a predetermined upper limit 12 and increases the amount of injection when the speed reaches a predetermined lower limit 13; compare FIGS. 3 and 4.
  • the friction losses 14 of the motor 10 according to FIG. 2 remove mechanical work from the motor 10. 3 and 4, the upper limit value 12 and the lower limit value 13 are marked on the ordinate. The speed then only varies within a band between the two limit values 12 and 13.
  • the speed curve between two injection points 7 and 8 illustrates the load state of the engine when idling.
  • a microcomputer 9 uses further engine parameters 15, such as temperature and pressure, determines the injection quantity necessary for maintaining the engine speed at the current load.
  • the calculated current injection quantity defines a position of the control rod 11 on the injection pump which is related to this injection quantity. This pair of values serves as a calibration point, so that the instantaneous injection quantity is then to be determined from the position of the control rod 11 at any time.
  • the microcomputer 9 calculates a change in the position of the control rod 11 on the basis of the information supplied to it, the control rod 11 is moved in steps by a stepping motor 16 and the completion of each step is reported back to the microcomputer 9 via the line 17. Starting from the calibration point, all steps of the stepping motor 16 are registered, as a result of which the exact position of the control rod 11 is known at all times.
  • Each step of the stepping motor 16 means a change in the injection quantity by a constant value. Therefore, from the knowledge of the steps of the stepping motor 16 stored in the microcomputer 9, and thus the changes in position of the control rod 11, the change in the injection quantity compared to the calibration point can be clearly determined.
  • the instantaneous injection quantity is known at each position of the control rod 11, whereby further measures for controlling the engine are made possible.

Abstract

1. An arrangement for controlling an internal combustion engine : - comprising a fuel injection pump with a regulating rod (11) controlled by a stepping motor (16) to positions which in each case determine the quantity of injected fuel ; - comprising a position regulator (9) which determines the position of the regulating rod in dependence upon the difference between a theoretical position value and an actual position value, the position regulator consisting of a micro-computer which calculates the number of regulating steps to be executed by the stepping motor (16) for each quantity of injected fuel, each regulating step changing the quantity of injected fuel by the same amount, and where the absolute value of the quantity of injected fuel is determined by the number and direction of the regulating steps, commencing from a calibration point ; - comprising a speed of rotation indicator in the form of a toothed disc (1, 2) which is coupled to the motor (10) ; and - comprising a tooth pulse generator (3, 4) which scans the toothed disc (1, 2) and supplies rotational speed pulses (5) at a pulse frequency proportional to the speed of rotation ; characterised in that - the position regulator contains a rotational speed regulator (9) which determines the position of the regulating rod in dependence upon the difference between a speed of rotation signal (19) and a theoretical speed of rotation (18) ; - that a PLL-circuit is provided, supplied with the rotational speed pulses (5) and supplying an analogue voltage proportional to the curve of the rotational speed, as an actual rotation speed signal (n) ; - that the micro-computer determines the rotational speed and the change in speed of rotation between two injection points to determine therefrom the no-load state ; and - that in the no-load state the micro-computer calculates the quantity of injected fuel necessary to maintain a predetermined no-load speed, taking into account additional engine characteristics, such as temperature and pressure, to which speed it assigns the current position of the stepping motor as a calibration point.

Description

Die Erfindung betrifft ein Verfahren zur Positionsbestimmung einer Regelstange an einer Einspritzpumpe für Verbrennungsmotoren, um die momentane Position mit einem vorgegebenen Sollwert in einem Regelkreis zu vergleichen und bei Abweichungen infolge geänderter Last am Motor die Position der Regelstange dem Sollwert anzugleichen, wobei die Position der Regelstange den Durchsatz der Einspritzpumpe und damit die momentane Einspritzmenge sowie die Drehzahl des Motors bestimmt und mittels Schrittmotoren veränderbar ist, wodurch auch bei geänderter Last am Motor die Drehzahl des Motors innerhalb eines definierten Drehzahlbandes liegt, wobei zur Aufnahme der Drehzahl des Motors an einer rotierenden Kurbelwelle ein Zahnimpulsgeber eine drehzahlabhängige Signalfolge abgibt.The invention relates to a method for determining the position of a control rod on an injection pump for internal combustion engines, in order to compare the current position with a predetermined target value in a control circuit and to adjust the position of the control rod to the target value in the event of deviations as a result of changed load on the engine, the position of the control rod being the Throughput of the injection pump and thus the instantaneous injection quantity and the speed of the engine are determined and can be changed by means of stepper motors, so that even when the load on the engine changes, the speed of the engine is within a defined speed range, with a tooth pulse generator for recording the speed of the engine on a rotating crankshaft emits a speed-dependent signal sequence.

Ein derartiges Verfahren zur Regelung von Verbrennungsmotoren ist bekannt (EP 00 18 351). Dabei wird der Durchsatz einer Einspritzpumpe durch ein Stellglied variiert.Such a method for regulating internal combustion engines is known (EP 00 18 351). The throughput of an injection pump is varied by an actuator.

Das Stellglied ist dort eine Regelstange, die von einem Regler, beispielsweise einem Mikrocomputer, gesteuert wird. Dieser Mikrocomputer kann unterschiedliche Signale empfangen, die repräsentativ für verschiedene Motorbedingungen sind. An seinem Ausgang gibt er ein Signal ab, das die Stellung der Regelstange an der Einspritzpumpe mittels Schrittmotoren verändert.The actuator there is a control rod which is controlled by a controller, for example a microcomputer. This microcomputer can receive different signals that are representative of different engine conditions. At its output, it emits a signal that changes the position of the control rod on the injection pump using stepper motors.

Beim bekannten Verfahren muß die Ausgangslage des Schrittmotors vor Ansteuerung genau bekannt sein. Es sind deshalb Federn vorgesehen, die im stromlosen Zustand den Schrittmotor in seine Ausgangsstellung zurückbewegen. Es kann auch ein Schalter vorgesehen sein, der den Schrittmotor in seiner Ausgangslage anhält. Wenn eine feste Ausgangslage des Schrittmotors bekannt ist, berechnet der Mikrocomputer zu jedem Zeitpunkt die Lage der Regelstange und damit die Einspritzmenge, da der Schrittmotor immer gleiche abzählbare Schritte ausführt. Solche Informationen über die momentane Einspritzmenge sind für die Motorsteuerung erforderlich.In the known method, the starting position of the stepper motor must be known exactly before activation. Therefore, springs are provided which move the stepper motor back to its starting position in the de-energized state. It can also a switch can be provided which stops the stepper motor in its initial position. If a fixed starting position of the stepper motor is known, the microcomputer calculates the position of the control rod and thus the injection quantity at all times, since the stepper motor always executes the same countable steps. Such information about the current injection quantity is required for the engine control.

Mechanische Bauteile, wie Federn und Schalter, sind bei längerem Einsatz zunehmend störanfällig. Für sie ist im Motorraum auch ein eigener Platz mit einer Befestigungsvorrichtung vorzusehen. Darüber hinaus ist eine exakte Justierung des oben erwähnten Schalters bzw. des Federanschlages erforderlich.Mechanical components, such as springs and switches, are increasingly susceptible to faults when used for a long time. A separate place with a fastening device must also be provided for them in the engine compartment. In addition, exact adjustment of the switch or spring stop mentioned above is required.

Der Erfindung liegt die Aufgabe zugrunde, die Ausgangslage des Schrittmotors genau zu bestimmen und dabei auf den Einsatz von mechanischen Bauteilen, wie Federn oder zusätzlichen Schaltern, zu verzichten.The invention has for its object to determine the starting position of the stepper motor precisely and to dispense with the use of mechanical components such as springs or additional switches.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst,

  • - daß die drehzahlabhängigen Ausgangssignale des Zahnimpulsgebers einem Phase Locked Loop zugeführt werden, an dessen Ausgang der zeitliche Verlauf der Motordrehzahl als Ausgangsspannung abnehmbar ist, und
  • - daß der Differentialquotient dieser Ausgangsspannung zwischen zwei Einspritzzeitpunkten als Maß für die durch Reibungsverluste des Motors gegebene Last am Motor dient, aus der mittels Motorkenngrößen, die für eine Beibehaltung der Motordrehzahl nötige Einspritzmenge bestimmt wird, die wiederum jederzeit eine konkrete Position der Regelstange an der Einspritzpumpe darstellt.
According to the invention, this object is achieved by
  • - That the speed-dependent output signals of the tooth pulse generator are fed to a phase locked loop, at the output of which the time profile of the motor speed can be removed as the output voltage, and
  • - That the differential quotient of this output voltage between two injection times serves as a measure of the load on the engine given by frictional losses of the engine, from which by means of engine parameters, the injection quantity necessary for maintaining the engine speed is determined, which in turn always has a specific position of the control rod on the injection pump represents.

Mit dem Verfahren nach der Erfindung wird ein Eichpunkt für die Position der Regelstange bestimmt, indem bei einer konkreten Einspritzmenge die Position bestimmt wird. Ein Zahnimpulsgeber mißt dazu den zeitlichen Verlauf der Motordrehzahl, woraus man unmittelbar ein Maß für die momentane Last am Motor erhält. Sind zusätzliche Verbraucher, wie beispielsweise die Lichtmaschine eingeschaltet, dann sinkt die Motordrehzahl zwischen zwei Einspritzpunkten stärker als bei geringerer Last am Motor ab. Um die mittlere Drehzahl konstant zu halten, wird die Einspritzmenge abhängig von der Last verändert, so daß die Last ein Maß für die aktuelle Einspritzmenge ist. Diese steht bei bekannter Last in eindeutigem Zusammenhang mit der Position der Regelstange.With the method according to the invention, a calibration point for the position of the control rod is determined by determining the position for a specific injection quantity. A Tooth pulse generator measures the time course of the engine speed, from which one obtains a measure of the instantaneous load on the engine. If additional consumers, such as the alternator, are switched on, the engine speed between two injection points drops more than with a lower load on the engine. In order to keep the average speed constant, the injection quantity is changed depending on the load, so that the load is a measure of the current injection quantity. With a known load, this is clearly related to the position of the control rod.

Mit dem Verfahren nach der Erfindung wird also der Vorteil erzielt, daß durch ein einmaliges Bestimmen der Last mittels einer Drehzahlmessung ein Eichpunkt bestimmt wird. Für eine konkrete Einspritzmenge ist dadurch die dazugehörige Position der Regelstange bekannt.The advantage of the method according to the invention is that a calibration point is determined by a single determination of the load by means of a speed measurement. The associated position of the control rod is known for a specific injection quantity.

Die Schritte des Schrittmotors sind gleichgroß und abzählbar. Weiterhin ist die Änderung der Einspritzmenge aufgrund eines Schrittes des Schrittmotors bekannt. Vom Eichpunkt ausgehend werden alle Schritte des Schrittmotors im Mikrocomputer registriert. Aus der Einspritzmenge des Eichpunktes und der Anzahl der Schritte des Schrittmotors ist die momentane Einspritzmenge zu jedem Zeitpunkt zu bestimmen.The steps of the stepper motor are the same size and countable. Furthermore, the change in the injection quantity due to a step of the stepping motor is known. Starting from the calibration point, all steps of the stepper motor are registered in the microcomputer. From the injection quantity of the calibration point and the number of steps of the stepper motor, the current injection quantity is to be determined at every point in time.

Eine Einrichtung zur Durchführung des erfindungsgemäßen Verfahrens gewinnt den benötigten zeitlichen Verlauf der Drehzahl durch einen Zahnimpulsgeber. Dieser führt drehzahlabhängige Ausgangssignale einem Phase Locked Loop (PLL) zu, wobei ein Phasendiskriminator und ein Tiefpaß in Serie geschaltet sind und ein spannungskontrollierter Oszillator zwischen dem Ausgang des Tiefpasses und einem Eingang des Phasendiskriminators angeordnet ist. Die Eingangsspannung des spannungskontrollierten Oszillators ist dann ein Abbild des zeitlichen Verlaufes der Drehzahl.A device for carrying out the method according to the invention obtains the required time course of the speed by means of a tooth pulse generator. This feeds speed-dependent output signals to a phase locked loop (PLL), a phase discriminator and a low-pass filter being connected in series and a voltage-controlled oscillator being arranged between the output of the low-pass filter and an input of the phase discriminator. The input voltage of the voltage-controlled oscillator is then an image of the time course of the speed.

Nach einer Ausgestaltung der Erfindung kann die Drehzahl im Leerlauf so geregelt werden, daß sie einen Minimalwert nicht unterschreiten und einen Maximalwert nicht überschreiten kann. Dabei werden die zuvor festgelegten Extremwerte für die Drehzahl in einem Leerlaufregelkreis des Mikrocomputers laufend mit dem momentanen Drehzahlwert verglichen. Unterschreitet die Drehzahl den Minimalwert, so wird die Einspritzmenge erhöht. Uberschreitet die Drehzahl den Maximalwert, dann wird die Einspritzmenge vermindert.According to one embodiment of the invention, the speed can be regulated in idle mode so that it cannot fall below a minimum value and cannot exceed a maximum value. The previously determined extreme values for the speed are continuously compared in an idle control loop of the microcomputer with the current speed value. If the speed falls below the minimum value, the injection quantity is increased. If the engine speed exceeds the maximum value, the injection quantity is reduced.

Das Verfahren nach der Erfindung hat den Vorteil, daß nicht nur die Veränderung der Einspritzmenge, sondern auch der Absolutwert der Einspritzmenge zu jedem Zeitpunkt bekannt sind, ohne daß am Betriebsbeginn die Position der Regelstange durch zusätzliche Meßeinrichtungen zu bestimmen wäre. Auch eine mechanische Weiterführung der Regelstange in eine Ruhestellung - nach Ausschalten des Motors - kann unterbleiben.The method according to the invention has the advantage that not only the change in the injection quantity, but also the absolute value of the injection quantity is known at all times, without the position of the control rod having to be determined by additional measuring devices at the start of operation. A mechanical continuation of the control rod into an idle position - after switching off the engine - can also be omitted.

Die Erfindung soll anhand eines in der Zeichnung grob schematisch wiedergegebenen Ausführungsbeispiels näher erläutert werden:

  • Fig. 1 zeigt eine Einrichtung zum Bestimmen des zeitlichen Verlaufes der Drehzahl eines Verbrennungsmotors,
  • Fig. 2 veranschaulicht eine Begrenzung der Drehzahl zwischen einem oberen und einem unteren Extremwert,
  • Fig. 3 zeigt einen zeitlichen Verlauf der Drehzahl bei kleiner Last am Motor innerhalb eines Drehzahlbandes,
  • Fig. 4 zeigt den zeitlichen Verlauf der Drehzahl bei großer Last am Motor innerhalb eines Drehzahlbandes,
  • Fig. 5 veranschaulicht eine Einrichtung zur Steuerung eines Dieselmotors unter Einsatz eines Mikrocomputers und von Schrittmotoren.
The invention will be explained in more detail with reference to an exemplary embodiment shown roughly schematically in the drawing:
  • 1 shows a device for determining the time course of the speed of an internal combustion engine,
  • 2 illustrates a limitation of the speed between an upper and a lower extreme value,
  • 3 shows a time course of the speed at a low load on the engine within a speed range,
  • 4 shows the time course of the speed at high load on the engine within a speed range,
  • 5 illustrates a device for controlling a diesel engine using a microcomputer and stepper motors.

An einer rotierenden Scheibe 1 nach Fig. 1, die mit der Kurbelwelle eines Motors verbunden ist, sind Markierungselemente 2 angeformt. Ein Zahnimpulsgeber 3 registriert die Markierungselemente 2 und sendet eine Signalfolge aus. Eine Auswerteschaltung 4 erzeugt daraus ein drehzahlmoduliertes Signal S, das einem Phasendiskriminator 61 in einem Phase Locked Loop (PLL) 6 zugeleitet wird. Mit dem Phasendiskriminator 61 ist ein Tiefpaß 62 in Reihe geschaltet. Ein spannungskontrollierter Oszillator 63 ist zwischen dem Ausgang des Tiefpasses 62 und einem Eingang des Phasendiskriminators 61 eingeschaltet. Die Eingangsspannung des spannungskontrollierten Oszillators 63 ist dann ein Abbild des zeitlichen Verlaufes der Drehzahl n der rotierenden Scheibe 1, wie er in den Fig. 3 und 4 dargestellt ist. Auf der Abszisse ist dort jeweils die Zeit t und auf der Ordinate die Drehzahl n aufgetragen. Bei geringer Belastung des Motors geht die Drehzahl n infolge von Reibungsverlusten zwischen zwei Einspritzzeitpunkten 7 und 8 weniger zurück - Fig. 3 - als bei hoher Last am Motor; man vergleiche Fig. 4.Markings are on a rotating disk 1 according to FIG. 1, which is connected to the crankshaft of an engine molded on elements 2. A tooth pulse generator 3 registers the marking elements 2 and sends out a signal sequence. From this, an evaluation circuit 4 generates a speed-modulated signal S which is fed to a phase discriminator 61 in a phase locked loop (PLL) 6. A low-pass filter 62 is connected in series with the phase discriminator 61. A voltage controlled oscillator 63 is connected between the output of the low pass 62 and an input of the phase discriminator 61. The input voltage of the voltage-controlled oscillator 63 is then an image of the time profile of the speed n of the rotating disc 1, as shown in FIGS. 3 and 4. Time t is plotted there on the abscissa and speed n is plotted on the ordinate. At a low load on the engine, the speed n decreases less due to friction losses between two injection times 7 and 8 - FIG. 3 - than at high engine loads; see Fig. 4.

Einem Leerlaufregelkreis 91 nach Fig. 2, der innerhalb eines Mikrocomputers 9 nach Fig. 5 angeordnet ist, werden über eine Zuleitung 18 Grenzwerte 12 und 13 für die Drehzahl und über eine Leitung 19 der momentane Wert der Drehzahl zugeführt. Der Leerlaufregelkreis 91 verkleinert die Einspritzmenge in einem Motor 10 durch Bewegen eines Mengenstellgliedes über eine Regelstange 11, wenn die Drehzahl einen vorgegebenen oberen Grenzwert 12 erreicht, und vergrößert die Einspritzmenge, wenn die Drehzahl einen vorgegebenen unteren Grenzwert 13 erreicht; man vergleiche die Fig. 3 und 4. Die Reibungsverluste 14 des Motors 10 nach Fig. 2 entziehen dem Motor 10 mechanische Arbeit. In den Fig. 3 und 4 sind auf der Ordinate der obere Grenzwert 12 und der untere Grenzwert 13 markiert. Die Drehzahl variiert dann nur innerhalb eines Bandes zwischen den beiden Grenzwerten 12 und 13.An idle control circuit 91 according to FIG. 2, which is arranged within a microcomputer 9 according to FIG. 5, is supplied with limit values 12 and 13 for the rotational speed via a feed line 18 and the instantaneous value of the rotational speed via a line 19. The idle control loop 91 decreases the amount of injection in an engine 10 by moving a quantity actuator over a control rod 11 when the speed reaches a predetermined upper limit 12 and increases the amount of injection when the speed reaches a predetermined lower limit 13; compare FIGS. 3 and 4. The friction losses 14 of the motor 10 according to FIG. 2 remove mechanical work from the motor 10. 3 and 4, the upper limit value 12 and the lower limit value 13 are marked on the ordinate. The speed then only varies within a band between the two limit values 12 and 13.

Der Drehzahlverlauf zwischen zwei Einspritzpunkten 7 und 8 veranschaulicht den Lastzustand des Motors im Leerlauf. Mittels weiterer Motorkenngrößen 15, wie Temperatur und Druck, bestimmt ein Mikrocomputer 9 nach Fig. 5 die bei der momentanen Last für eine Beibehaltung der Motordrehzahl nötige Einspritzmenge. Bei einer bekannten festen Last definiert die berechnete aktuelle Einspritzmenge eine mit dieser Einspritzmenge in Zusammenhang stehende Position der Regelstange 11 an der Einspritzpumpe. Dieses Wertepaar dient als Eichpunkt, so daß dann aus der Position der Regelstange 11 zu jedem Zeitpunkt die momentane Einspritzmenge zu bestimmen ist.The speed curve between two injection points 7 and 8 illustrates the load state of the engine when idling. Using further engine parameters 15, such as temperature and pressure, a microcomputer 9 according to FIG. 5 determines the injection quantity necessary for maintaining the engine speed at the current load. In the case of a known fixed load, the calculated current injection quantity defines a position of the control rod 11 on the injection pump which is related to this injection quantity. This pair of values serves as a calibration point, so that the instantaneous injection quantity is then to be determined from the position of the control rod 11 at any time.

Wenn der Mikrocomputer 9 aufgrund der ihm zugeführten Informationen eine Veränderung der Position der Regelstange 11 errechnet, wird die Regelstange 11 durch einen Schrittmotor 16 stufenweise bewegt und der Vollzug eines jeden Schrittes über die Leitung 17 an den Mikrocomputer 9 zurückgemeldet. Vom Eichpunkt ausgehend werden alle Schritte des Schrittmotors 16 registriert, wodurch zu jedem Zeitpunkt die genaue Lage der Regelstange 11 bekannt ist.When the microcomputer 9 calculates a change in the position of the control rod 11 on the basis of the information supplied to it, the control rod 11 is moved in steps by a stepping motor 16 and the completion of each step is reported back to the microcomputer 9 via the line 17. Starting from the calibration point, all steps of the stepping motor 16 are registered, as a result of which the exact position of the control rod 11 is known at all times.

Jeder Schritt des Schrittmotors 16 bedeutet eine Veränderung der Einspritzmenge um einen konstanten Wert. Daher ist aus der Kenntnis der im Mikrocomputer 9 gespeicherten Schritte des Schrittmotors 16, und damit der Positionsänderungen der Regelstange 11, die Änderung der Einspritzmenge gegenüber dem Eichpunkt eindeutig zu bestimmen.Each step of the stepping motor 16 means a change in the injection quantity by a constant value. Therefore, from the knowledge of the steps of the stepping motor 16 stored in the microcomputer 9, and thus the changes in position of the control rod 11, the change in the injection quantity compared to the calibration point can be clearly determined.

Mittels des bekannten Eichpunktes ist bei jeder Position der Regelstange 11 die momentane Einspritzmenge bekannt, wodurch weitere Maßnahmen zur Steuerung des Motors ermöglicht werden.By means of the known calibration point, the instantaneous injection quantity is known at each position of the control rod 11, whereby further measures for controlling the engine are made possible.

Claims (3)

1. Verfahren zur Positionsbestimmung einer Regelstange (11) an einer Einspritzpumpe für Verbrennungsmotoren, um die momentane Position mit einem vorgegebenen Sollwert in einem Regelkreis zu vergleichen und bei Abweichungen infolge geänderter Last am Motor (10) die Position der Regelstange (11) dem Sollwert anzugleichen, wobei die Position der Regelstange (11) den Durchsatz der Einspritzpumpe und damit die momentane Einspritzmenge sowie die Drehzahl des Motors (10) bestimmt und mittels Schrittmotoren (16) veränderbar ist, wodurch auch bei geänderter Last am Motor (10) die Drehzahl des Motors (10) innerhalb eines definierten Drehzahlbandes liegt, wobei zur Aufnahme der Drehzahl des Motors (10) an einer rotierenden Kurbelwelle ein Zahnimpulsgeber (3) eine drehzahlabhängige Signalfolge (5) abgibt, dadurch gekennzeichnet , - daß die drehzahlabhängigen Ausgangssignale (5) des Zahnimpulsgebers (3) einem Phase Locked Loop (6) zugeführt werden, an dessen Ausgang der zeitliche Verlauf der Motordrehzahl als Ausgangsspannung abnehmbar ist, und - daß der Differentialquotient dieser Ausgangsspannung zwischen zwei Einspritzzeitpunkten (7 und 8) als Maß für die durch Reibungsverluste (14) des Motors (10) gegebene Last am Motor dient, aus der mittels Motorkenngrößen (15) die für eine Beibehaltung der Motordrehzahl nötige Einspritzmenge bestimmt wird, die wiederum jederzeit eine konkrete Position der Regelstange (11) an der Einspritzpumpe darstellt. 1. Method for determining the position of a control rod (11) on an injection pump for internal combustion engines, in order to compare the current position with a predetermined setpoint in a control circuit and to adjust the position of the control rod (11) to the setpoint in the event of deviations as a result of changed load on the engine (10) , The position of the control rod (11) determines the throughput of the injection pump and thus the instantaneous injection quantity and the speed of the motor (10) and can be changed by means of stepper motors (16), so that the speed of the motor even when the load on the motor (10) changes (10) lies within a defined speed range, a tooth pulse generator (3) emitting a speed-dependent signal sequence (5) for recording the speed of the engine (10) on a rotating crankshaft, characterized in that - That the speed-dependent output signals (5) of the tooth pulse generator (3) are fed to a phase locked loop (6), at the output of which the time curve of the motor speed can be removed as the output voltage, and - That the differential quotient of this output voltage between two injection times (7 and 8) serves as a measure of the load on the engine given by friction losses (14) of the engine (10), from which, by means of engine parameters (15), the injection quantity necessary for maintaining the engine speed is determined , which in turn represents a specific position of the control rod (11) on the injection pump at any time. 2. Einrichtung zur Durchführung des Verfahrens nach Anspruch 1 mit einem Zahnimpulsgeber (3) zur Lageerkennung von Markierungselementen (2) an einer rotierenden Scheibe (1) an einer Kurbelwelle eines Verbrennungsmotors, dadurch gekennzeichnet, daß der Zahnimpulsgeber (3) drehzahlabhängige Ausgangssignale (5) einem Phase Locked Loop (6) zuführt, wobei mit dem Zahnimpulsgeber (3) ein Phasendiskriminator (61) und ein Tiefpaß (62) in Reihe geschaltet sind und ein spannungskontrollierter Oszillator (63) zwischen dem Ausgang des Tiefpasses (62) und einem Eingang des Phasendiskriminators (61) eingeschaltet ist.2. Device for performing the method according to claim 1 with a tooth pulse generator (3) for position detection of marking elements (2) on a rotating disc (1) on a crankshaft of an internal combustion engine, characterized in that the tooth pulse generator (3) speed-dependent output signals (5) a phase locked loop (6) feeds, with the tooth pulse generator (3) a phase discriminator (61) and a low-pass filter (62) are connected in series and a voltage-controlled oscillator (63) between the output of the low-pass filter (62) and an input of the phase discriminator (61) is switched on. 3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, - daß die zuvor gemessene Drehzahl mit einem vorgegebenen unteren Grenzwert (13) und einem vorgegebenen oberen Grenzwert (12) der Drehzahl in einem Mikrocomputer verglichen wird, und - daß die Einspritzmenge vergrößert wird, wenn die gemessene Drehzahl den unteren Grenzwert (13) erreicht und verkleinert wird, wenn sie den oberen Grenzwert (12) erreicht. 3. The method according to claim 1, characterized in - That the previously measured speed is compared with a predetermined lower limit (13) and a predetermined upper limit (12) of the speed in a microcomputer, and - That the injection quantity is increased when the measured speed reaches the lower limit (13) and reduced when it reaches the upper limit (12).
EP84106741A 1983-06-27 1984-06-13 Control device for an internal combustion engine Expired EP0129776B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84106741T ATE29765T1 (en) 1983-06-27 1984-06-13 ARRANGEMENT FOR CONTROLLING AN INTERNAL COMBUSTION ENGINE.

Applications Claiming Priority (2)

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DE19833323106 DE3323106A1 (en) 1983-06-27 1983-06-27 METHOD AND DEVICE FOR DETERMINING THE POSITION OF A CONTROL ROD ON AN INJECTION PUMP FOR COMBUSTION ENGINES
DE3323106 1983-06-27

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EP0129776A1 true EP0129776A1 (en) 1985-01-02
EP0129776B1 EP0129776B1 (en) 1987-09-16

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JP (1) JPS6013952A (en)
AT (1) ATE29765T1 (en)
DE (2) DE3323106A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2658246A1 (en) * 1990-02-10 1991-08-16 Bosch Gmbh Robert METHOD AND DEVICE FOR CONTROLLING A FUEL INJECTION PUMP CONTROLLED BY ELECTROMAGNETIC VALVE.
EP0566281A1 (en) * 1992-04-15 1993-10-20 Zexel Corporation Electronic controller of fuel supplying device for engine
CN109083791A (en) * 2018-09-30 2018-12-25 潍柴动力股份有限公司 The fault detection method and fault detection means of engine oil spout driving
CN109139323A (en) * 2018-11-07 2019-01-04 河南柴油机重工有限责任公司 A kind of combined type fuel injection camshaft phase and fuel feeding timing detection device and method

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3442373A1 (en) * 1984-11-20 1986-05-28 Voest-Alpine Friedmann GmbH, Linz CIRCUIT FOR MONITORING A STEPPER MOTOR
DE4014966A1 (en) * 1990-05-10 1991-11-14 Kloeckner Humboldt Deutz Ag Engine diagnosis method using temp. chamber sensitive element - to measure combustion chamber temp. at indication of engine load
JP2784608B2 (en) * 1990-09-28 1998-08-06 日立建機株式会社 Motor speed control device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2252490A1 (en) * 1973-11-28 1975-06-20 Alsthom Cgee Electronic speed control method for I.C. engine - controls fuel flow with stepping motor fed with electric impulses
FR2301691A1 (en) * 1975-02-19 1976-09-17 Bosch Gmbh Robert METHOD AND DEVICE FOR OBTAINING A MEASURED VALUE ALLOWING AN APPRA
US3991727A (en) * 1974-06-14 1976-11-16 Nippon Soken, Inc. Electronically controlled fuel injection system
DE3015004A1 (en) * 1979-04-20 1981-01-08 Aisan Ind Fuel-air mixture control for carburettor of IC engine - calculates engine speed from measured crankshaft speed and compares it with required speed
GB2078400A (en) * 1980-06-21 1982-01-06 Bosch Gmbh Robert Control means for speed control of a compression ignition internal combustion engine
GB2079007A (en) * 1980-06-30 1982-01-13 Diesel Kiki Co Fuel injection apparatus for internal combustion engines

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4502437A (en) * 1981-11-02 1985-03-05 Ambac Industries, Incorporated Electrical fuel control system and method for diesel engines

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2252490A1 (en) * 1973-11-28 1975-06-20 Alsthom Cgee Electronic speed control method for I.C. engine - controls fuel flow with stepping motor fed with electric impulses
US3991727A (en) * 1974-06-14 1976-11-16 Nippon Soken, Inc. Electronically controlled fuel injection system
FR2301691A1 (en) * 1975-02-19 1976-09-17 Bosch Gmbh Robert METHOD AND DEVICE FOR OBTAINING A MEASURED VALUE ALLOWING AN APPRA
DE3015004A1 (en) * 1979-04-20 1981-01-08 Aisan Ind Fuel-air mixture control for carburettor of IC engine - calculates engine speed from measured crankshaft speed and compares it with required speed
GB2078400A (en) * 1980-06-21 1982-01-06 Bosch Gmbh Robert Control means for speed control of a compression ignition internal combustion engine
GB2079007A (en) * 1980-06-30 1982-01-13 Diesel Kiki Co Fuel injection apparatus for internal combustion engines

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2658246A1 (en) * 1990-02-10 1991-08-16 Bosch Gmbh Robert METHOD AND DEVICE FOR CONTROLLING A FUEL INJECTION PUMP CONTROLLED BY ELECTROMAGNETIC VALVE.
EP0566281A1 (en) * 1992-04-15 1993-10-20 Zexel Corporation Electronic controller of fuel supplying device for engine
US5339781A (en) * 1992-04-15 1994-08-23 Zexel Corporation Electronic governor of fuel supplying device for engine
CN109083791A (en) * 2018-09-30 2018-12-25 潍柴动力股份有限公司 The fault detection method and fault detection means of engine oil spout driving
CN109139323A (en) * 2018-11-07 2019-01-04 河南柴油机重工有限责任公司 A kind of combined type fuel injection camshaft phase and fuel feeding timing detection device and method
CN109139323B (en) * 2018-11-07 2023-09-01 河南柴油机重工有限责任公司 Device and method for detecting phase and oil supply time of cam shaft of composite oil injection pump

Also Published As

Publication number Publication date
ATE29765T1 (en) 1987-10-15
DE3466269D1 (en) 1987-10-22
DE3323106A1 (en) 1985-01-10
JPS6013952A (en) 1985-01-24
EP0129776B1 (en) 1987-09-16

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