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FR2463916A1 - Engine shaft revolution rate measurement and sector detection - using common disc reference and sector separating marker sensing - Google Patents

Engine shaft revolution rate measurement and sector detection - using common disc reference and sector separating marker sensing Download PDF

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Publication number
FR2463916A1
FR2463916A1 FR8017780A FR8017780A FR2463916A1 FR 2463916 A1 FR2463916 A1 FR 2463916A1 FR 8017780 A FR8017780 A FR 8017780A FR 8017780 A FR8017780 A FR 8017780A FR 2463916 A1 FR2463916 A1 FR 2463916A1
Authority
FR
France
Prior art keywords
sector
rotation
sectors
angle
mark
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR8017780A
Other languages
French (fr)
Other versions
FR2463916B3 (en
Inventor
Uwe Kiencke
Gunter Honig
Rainer Bone
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of FR2463916A1 publication Critical patent/FR2463916A1/en
Application granted granted Critical
Publication of FR2463916B3 publication Critical patent/FR2463916B3/fr
Granted legal-status Critical Current

Links

Classifications

    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/244—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains
    • G01D5/245—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains using a variable number of pulses in a train
    • G01D5/2454—Encoders incorporating incremental and absolute signals
    • G01D5/2455—Encoders incorporating incremental and absolute signals with incremental and absolute tracks on the same encoder
    • G01D5/2457—Incremental encoders having reference marks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/489—Digital circuits therefor
    • 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

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (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

The transducer, pref. inductive, determines the revolution rate and/or a marked angular position of a multiple cylinder combustion engine shaft. A disc (5) rotating with the shaft is divided into sectors (1-12) separated by sharply defined markers (21-32). The disc periphery is designed to facilitate simple detection of individual sectors of a reference marker (33) in one sector using a common sensing arrangement for economy. The angular separation of the reference marker (33) and its preceding marker (32) is more than twice or less than half the angular separation of the reference marker and the subsequent marker (21). The angular marker width is between 2 degrees and 5 degrees, pref. 3 degrees. The separation between markers is about 30 degrees. 5 degrees offsets may be used between neighbouring markings.

Description

L'invention concerne un émétteur destiné à la détection, en particulier par induction, de la vitesse de rotation d'un arbre et/ou d'un angle de rotation marqué de ce dernier, à l'aide d'un disque tournant avec l'arbre, disposant sur sa périphérie de plusieurs secteurs disposés les uns derrière les autres dans le sens de la rotation, secteurs situés à une même distance périphérique de l'axe de rotation et séparés des secteurs suivants par un repère étroit, perpendiculaire-au sens de rotation. The invention relates to a transmitter intended for the detection, in particular by induction, of the speed of rotation of a shaft and / or of a marked angle of rotation of the latter, using a rotating disc with the tree, having on its periphery several sectors arranged one behind the other in the direction of rotation, sectors located at the same peripheral distance from the axis of rotation and separated from the following sectors by a narrow mark, perpendicular-to the direction of rotation.

On connais déjà des émetteurs de ce genre, destinés à des moteurs à combustion interne à plusieurs cylindres, dans lesquels l'un des nombreux secteurs -circulaires doit pouvoir être affecté à un cylindre dkerminé du moteur à combustion interne. On peut pour cela prévoir en tant qu'émetteur de repère de référence des goupilles en un matériau ferromagnétique, et insérées dans le disque, goupilles qui, quand elles passent devant une bobine d'induction garnie d'un noyau en fer doux, créent dans cette bobine une impulsion de repère de référence à l'aide de laquelle il est possible d'affecter un secteur déterminé à un cylindre déterminé. Cependant, les dispositifs de ce genre exigent des efforts supplémentaires pour l'exploration des repères de référence. Transmitters of this type are already known, intended for internal combustion engines with several cylinders, in which one of the numerous circular sectors must be able to be assigned to a determined cylinder of the internal combustion engine. For this, it is possible to provide, as a reference mark transmitter, pins made of a ferromagnetic material, and inserted into the disc, pins which, when they pass in front of an induction coil furnished with a soft iron core, create in this coil a reference reference pulse with the help of which it is possible to assign a determined sector to a determined cylinder. However, such devices require additional efforts to explore benchmarks.

L'invention a pour but de créer un émetteur, fonctionnant en particulier par induction, tel que la zone marginale du disque soit réalisée de façon à permettre la détection des différents secteurs par des moyens techniques simples, et à permettre de garnir l'un des secteurs d'un repère de référence, lequel peut être exploré avec les mêmes dispositifs que les secteurs principaux. Dans ce but le dispositif de l'invention est caractérisé en ce que dans l'un des secteurs du disque, est disposé un repère de référence dont l'angle au centre par rapport au repère précédent ou au repère suivant est considérablement plus faible, et en particulier au plus deux fois plus faible, que l'angle au centre fait avec le repère précédent ou inversement. The object of the invention is to create a transmitter, operating in particular by induction, such that the marginal zone of the disc is produced so as to allow the detection of the different sectors by simple technical means, and to allow one of the sectors of a reference frame, which can be explored with the same devices as the main sectors. For this purpose, the device of the invention is characterized in that in one of the sectors of the disc, there is disposed a reference mark whose angle at the center relative to the previous mark or to the next mark is considerably smaller, and in particular at most two times smaller, than the angle at the center made with the previous reference or vice versa.

On obtient des conditions particulièrement favorables dans le cas d'un disque fabriqué en un matériau magnétique, et dans lequel les secteurs se trouvant entre les repères sont découpés, par estampage ou par fraisage, en tant que secteurs d'anneaux circulaires dans le disque initialement circulaire, les repères se trouvant ainsi à une certaine distance radiale de la périphérie des secteurs. Particularly favorable conditions are obtained in the case of a disc made of a magnetic material, and in which the sectors lying between the marks are cut, by stamping or by milling, as sectors of circular rings in the disc initially circular, the marks thus being at a certain radial distance from the periphery of the sectors.

La description ci-après se rapporte à un exemple de réalisation qui concerne un disque d'émetteur en une tôle d'acier mince, représentée sur le dessin dans une vue axiale. The description below relates to an exemplary embodiment which relates to a transmitter disc made of a thin sheet of steel, shown in the drawing in an axial view.

Ce disque S est calé sur un arbre W, par exemple le vilebrequin d'un moteur à combustion interne non représenté, et il est subdivisé, sur sa zone marginale, en douze secteurs 1 à 12. Ces secteurs sont obtenus par découpage, à la matrice, de secteurs circulaires ayant chacun un angle au centre de 270. Chaque secteur est limité dans le sens périphérique, par rapport au secteur précédent ou au secteur suivant, par une dent étroite rectangulaire 21 à 32, qui est en saillie par rapport à la surface périphérique des secteurs et présente un angle au centre de 3 .  This disc S is wedged on a shaft W, for example the crankshaft of an internal combustion engine not shown, and it is subdivided, on its marginal zone, into twelve sectors 1 to 12. These sectors are obtained by cutting, at the matrix, of circular sectors each having an angle at the center of 270. Each sector is limited in the peripheral direction, with respect to the preceding sector or the following sector, by a narrow rectangular tooth 21 to 32, which projects from the peripheral surface of the sectors and has an angle at the center of 3.

Pour pouvoir identifier le secteur indiqué par le repère 1 lors de la rotation du disque, et pour pouvoir y affecter un cylindre particulier, par exemple le premier cylindre du moteur à combustion interne, il est prévu, dans le secteur 1, et décalée de 50 dans le sens de rotation par rapport à la dent précédente 32, une dent > da repère de référence 33, réalisée comme les autres dents. Cette dernière dent fait par rapport à la dent suivante 21, servant de repère, un angle au centre de 250.  To be able to identify the sector indicated by the mark 1 during the rotation of the disc, and to be able to assign a particular cylinder to it, for example the first cylinder of the internal combustion engine, it is provided, in sector 1, and offset by 50 in the direction of rotation with respect to the preceding tooth 32, a tooth> da reference mark 33, produced like the other teeth. This last tooth made with respect to the next tooth 21, serving as a reference, an angle at the center of 250.

Dans l'exemple de réalisation représenté, il est prévu pour les secteurs un arc de 300, lequel présente un avantage important, qui réside en ce que le disque de l'émetteur peut avoir une utilisation universelle dans tous les moteurs à combustion interne symétriques, et même dans les moteurs à combustion non-symétriques à six cylindres. Un autre avantage de ce dispositif réside en ce qu'il n'est nécessaire que d'avoir un montage d'identification simple et monopolaire, existant déjà pour d'autres systèmes connus. In the embodiment shown, an arc of 300 is provided for the sectors, which has an important advantage, which is that the disc of the transmitter can be used universally in all symmetrical internal combustion engines, and even in non-symmetrical six-cylinder combustion engines. Another advantage of this device lies in the fact that it is only necessary to have a simple and monopolar identification assembly, already existing for other known systems.

Claims (4)

REVENDICATIONS 1.- Emetteur destiné à la détection, par induction, de la vitesse de rotation et/ou d'un angle de rotation marqué d'un arbre, au moyen d'un disque tournant avec l'arbre, présentant sur sa périphérie plusieurs secteurs se succédant dans le sens de la rotation, secteurs dont la surface périphérique est à une distance radiale constante de l'axe de rotation et qui sont séparés du secteur suivant, chacun par un repère étroit, limité par des flancs à pente raide et perpendiculaires au sens de rotation, émetteur caractérisé en ce que, dans l'un des secteurs (1 à 12) du disque (S), est disposé un repère de référence (33) dont angle au centre par rapport au repère précédent ou au repère suivant est considérablement plus faihe, et en particulier au plus deux fois plus faible, que l'angle au centre fait avec le repère précédent (32) ou inversement. 1.- Transmitter intended for the detection, by induction, of the speed of rotation and / or of a marked angle of rotation of a shaft, by means of a disc rotating with the shaft, having on its periphery several sectors succeeding each other in the direction of rotation, sectors whose peripheral surface is at a constant radial distance from the axis of rotation and which are separated from the following sector, each by a narrow mark, limited by flanks with a steep slope and perpendicular to the direction of rotation, transmitter characterized in that, in one of the sectors (1 to 12) of the disc (S), there is a reference mark (33) whose angle at the center with respect to the previous mark or the next mark is considerably lower, and in particular at most twice smaller, than the angle at the center made with the previous reference (32) or vice versa. 2.- Emetteur selon la revendication 2, caractérisé en ce que les repères (21 à 32) forment un arc dont l'angle au centre est compris entre 2 et 50, et de préférence est égal à 30.  2.- transmitter according to claim 2, characterized in that the marks (21 to 32) form an arc whose angle at the center is between 2 and 50, and preferably is equal to 30. 3.- Emetteur selon l'une des revendications 1 ou 2, caractérisé en ce que les repères (21 à 32) sont décavés les uns par rapport aux autres selon un angle au centre de 300 dans le sens de rotation du disque. 3.- Transmitter according to one of claims 1 or 2, characterized in that the pins (21 to 32) are decaved relative to each other at an angle at the center of 300 in the direction of rotation of the disc. 4.- Emetteur selon la revendication 3, caractérisé en ce que le repère de référence (33) est décalé d'environ 50 par rapport au repère voisin (32), cet angle correspondant au décalage de 1'angih au centre.  4.- transmitter according to claim 3, characterized in that the reference mark (33) is offset by about 50 relative to the neighboring mark (32), this angle corresponding to the offset of the angih in the center.
FR8017780A 1979-08-18 1980-08-12 Engine shaft revolution rate measurement and sector detection - using common disc reference and sector separating marker sensing Granted FR2463916A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19792933517 DE2933517A1 (en) 1979-08-18 1979-08-18 ENCODER FOR, IN PARTICULAR INDUCTIVE, DETECTION OF THE SPEED AND / OR A MARKED TURNING ANGLE OF A SHAFT

Publications (2)

Publication Number Publication Date
FR2463916A1 true FR2463916A1 (en) 1981-02-27
FR2463916B3 FR2463916B3 (en) 1982-06-04

Family

ID=6078771

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8017780A Granted FR2463916A1 (en) 1979-08-18 1980-08-12 Engine shaft revolution rate measurement and sector detection - using common disc reference and sector separating marker sensing

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DE (1) DE2933517A1 (en)
FR (1) FR2463916A1 (en)
IT (1) IT1132427B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19813497C2 (en) * 1998-03-26 2000-11-16 Vogt Electronic Ag Inductive displacement sensor
DE19918414C5 (en) * 1999-04-23 2010-11-25 Novoferm Tormatic Gmbh Drive unit for a gate and method for operating a drive unit for a gate

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2357061C2 (en) * 1973-11-15 1985-02-14 Robert Bosch Gmbh, 7000 Stuttgart Device for the delivery of uniform pulses at certain angular positions of a rotatable shaft and for the formation of at least one reference signal

Also Published As

Publication number Publication date
FR2463916B3 (en) 1982-06-04
DE2933517A1 (en) 1981-03-26
IT8024203A0 (en) 1980-08-14
IT1132427B (en) 1986-07-02

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