EP0607177B1 - Agencement de detection de la position angulaire d'une piece rotative - Google Patents

Agencement de detection de la position angulaire d'une piece rotative Download PDF

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Publication number
EP0607177B1
EP0607177B1 EP92919479A EP92919479A EP0607177B1 EP 0607177 B1 EP0607177 B1 EP 0607177B1 EP 92919479 A EP92919479 A EP 92919479A EP 92919479 A EP92919479 A EP 92919479A EP 0607177 B1 EP0607177 B1 EP 0607177B1
Authority
EP
European Patent Office
Prior art keywords
angle marks
reference mark
sensor
marks
angle
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.)
Expired - Lifetime
Application number
EP92919479A
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German (de)
English (en)
Other versions
EP0607177A1 (fr
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
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Robert Bosch GmbH
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0607177A1 publication Critical patent/EP0607177A1/fr
Application granted granted Critical
Publication of EP0607177B1 publication Critical patent/EP0607177B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 disc connected to the crankshaft or camshaft of an internal combustion engine and having circumferentially evenly distributed tooth-shaped angle marks is provided by a sensor is scanned.
  • 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 designed as an inductive pickup, delivers a signal which is formed into a square-wave signal in a processing circuit and is evaluated in a subsequent microcomputer.
  • the reference mark is recognized by successive time comparisons, the recognition then taking place if a short time is followed by a longer time and then a shorter time.
  • the known device has the disadvantage that a multiplicity of teeth, for example 180, are provided, the determination of the number of teeth having been optimized in such a way that the time intervals between similar flank marks can still be reasonably evaluated.
  • EP 00 13 846 Another device for detecting the angular position 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.
  • An ignition control system for multi-cylinder engines is known from US Pat. No. 4,787,354, in which an encoder disk is arranged on the crankshaft and has a plurality of teeth, for example 60, and a reference mark formed by two missing teeth.
  • This sensor disc is scanned with the help of a sensor.
  • the position of the crankshaft can be determined from the pulse sequence supplied by the sensor.
  • ignition control pulses are calculated in the control unit based on the pulses supplied by the sensor.
  • Another internal combustion engine control system is known from WO-A 85/05445, which calculates control pulses for the internal combustion engine, the information required for the calculation being obtained with the aid of a sensor which scans a sensor disk connected to the crankshaft of the internal combustion engine. Since this encoder disk has a large number of teeth on its circumference and a reference mark designed as a missing tooth, the position of the crankshaft and the speed of the crankshaft can be determined on the basis of the pulse sequence supplied by the sensor.
  • 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 allows a fixed relationship between the marking and position of the individual cylinders for all common numbers of cylinders and thus a simple Evaluation enabled. This is possible because 36 is divisible by 2, 3, 4, 6 and 12.
  • 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 disk 10 which has a large number of angular 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
  • an 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 0 188 433.
  • 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-to-digital conversion in the control unit 19 itself.
  • 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 smaller than a second time t1 and this is significantly larger 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 additional camshaft signal N of a camshaft sensor is supplied to the microcomputer 18 or the control unit 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 when the cylinder sequence has been determined Outputs 20 common regulating or control processes.
  • 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 must be divisible 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. So that a voltage that can be evaluated as well as possible is induced in the sensor 15, it may be necessary to use a different encoder disc 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 is shown.
  • FIG. Lb A further possibility is shown in Fig. Lb, with similar angle marks 11b, which are significantly shorter than the spaces between the marks and a reference mark 12, the depth of which is less than that of the spaces between the similar angle marks, and combinations of the suggestions of the Figure 1, 1a, 1b 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.

Claims (5)

  1. Installation pour la détection de la position angulaire d'une pièce rotative (13) d'un moteur à combustion interne comprenant au moins un cylindre, un disque de capteur (10) relié à la pièce rotative, ce disque ayant des repères angulaires (11) répartis régulièrement à sa périphérie ainsi qu'un repère de référence (12) formé par l'absence de m repères angulaires de façon à avoir n-m repères angulaires (11), un capteur qui détecte les repères angulaires (11) et crée un signal de sortie, et en fonction des repères angulaires détectés (11), un circuit de traitement (14, 17, 18) qui exploite l'ordre chronologique du signal de sortie, caractérisée en ce que le nombre n est égal à 36 pour pouvoir être ainsi divisé par un maximum de nombres correspondant au nombre de cylindres respectifs du moteur à combustion interne, et m est égal à 2.
  2. Installation selon la revendication 1, caractérisée en ce que le repère de référence (12) est un intervalle prolongé entre deux repères angulaires (11, lla, llb) et s'étend seulement sur une longueur de deux repères angulaires et de trois intervalles.
  3. Installation selon la revendication 2, caractérisée en ce que le repère de référence (12) est moins profond que les intervalles entre les repères angulaires respectifs (11, lla, llb), de préférence, il est moitié moins profond.
  4. Installation selon l'une des revendications précédentes, caractérisée en ce qu'un signal d'arbre à came (N) est appliqué à l'appareil de commande (11) et les mesures de temps se font à partir de la détection des repères de référence.
  5. Installation selon la revendication 4, caractérisée en ce que dans l'appareil de commande (19), après détection des repères de référence (12), on a des opérations de comptage, les flancs des impulsions de tension (U17) étant exploités et à partir du nombre d'impulsions de tension, comptées, on conclut à la position de chaque cylindre.
EP92919479A 1991-10-10 1992-09-19 Agencement de detection de la position angulaire d'une piece rotative Expired - Lifetime EP0607177B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4133570 1991-10-10
DE4133570A DE4133570C1 (fr) 1991-10-10 1991-10-10
PCT/DE1992/000805 WO1993007449A1 (fr) 1991-10-10 1992-09-19 Agencement de detection de la position angulaire d'une piece rotative

Publications (2)

Publication Number Publication Date
EP0607177A1 EP0607177A1 (fr) 1994-07-27
EP0607177B1 true EP0607177B1 (fr) 1996-06-19

Family

ID=6442420

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92919479A Expired - Lifetime EP0607177B1 (fr) 1991-10-10 1992-09-19 Agencement de detection de la position angulaire d'une piece rotative

Country Status (7)

Country Link
US (1) US5497748A (fr)
EP (1) EP0607177B1 (fr)
JP (1) JPH07500164A (fr)
AU (1) AU2559092A (fr)
DE (2) DE4133570C1 (fr)
ES (1) ES2089559T3 (fr)
WO (1) WO1993007449A1 (fr)

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JP3904621B2 (ja) * 1995-08-29 2007-04-11 三菱電機株式会社 クランク角センサの異常検出装置
JP3186545B2 (ja) * 1995-10-06 2001-07-11 三菱電機株式会社 ４サイクル内燃機関制御装置
JPH11513117A (ja) * 1996-06-21 1999-11-09 アウトボード・マリーン・コーポレーション ２サイクルエンジンの回転方向を検出するための方法及び装置
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 (de) * 1998-01-12 2006-12-21 Siemens Ag Verfahren und magnetische Maßverkörperung zur Generierung eines Referenzsignals sowie Herstellungsverfahren für eine solche magnetische Maßverkörperung
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
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US6640777B2 (en) * 2000-10-12 2003-11-04 Kabushiki Kaisha Moric Method and device for controlling fuel injection in internal combustion engine
JP4270534B2 (ja) 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 内燃エンジンの負荷検出方法、制御方法、点火時期制御方法および点火時期制御装置
US6742502B2 (en) * 2000-10-12 2004-06-01 Kabushiki Kaisha Moric Engine control method and apparatus
DE10063755A1 (de) * 2000-12-21 2002-07-04 Bosch Gmbh Robert Verfahren zur Erkennung einer Singularität
US6679223B2 (en) 2001-04-20 2004-01-20 Denso Corporation Engine control system with cam sensor
JP3979161B2 (ja) * 2001-04-20 2007-09-19 株式会社デンソー エンジン制御装置
FR2827954B1 (fr) * 2001-07-25 2003-09-12 Siemens Automotive Sa Procede de correction du signal d'un capteur de position d'arbre a cames
AT4801U3 (de) * 2001-08-22 2002-06-25 Avl List Gmbh Verfahren und vorrichtung zum bereitstellen eines kurbelwinkelbasierten signalverlaufes
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 (ja) * 2006-02-27 2007-09-06 Citizen Holdings Co Ltd プリンタおよびｄｃモータの速度制御装置
EP2163858A1 (fr) * 2008-09-16 2010-03-17 Magneti Marelli Powertrain S.p.A. Procédé de contrôle pour déterminer la position angulaire d'un arbre de transmission d'un moteur à combustion interne
DE102011054933A1 (de) * 2011-10-28 2013-05-02 Dspace Digital Signal Processing And Control Engineering Gmbh Verfahren zur Erfassung eines Drehwinkels
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Also Published As

Publication number Publication date
AU2559092A (en) 1993-05-03
DE59206625D1 (de) 1996-07-25
WO1993007449A1 (fr) 1993-04-15
DE4133570C1 (fr) 1992-12-24
US5497748A (en) 1996-03-12
JPH07500164A (ja) 1995-01-05
ES2089559T3 (es) 1996-10-01
EP0607177A1 (fr) 1994-07-27

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