WO2017153027A1 - Moyen de détection pour une butée de débrayage centrale d'embrayage, butée de débrayage centrale d'embrayage et procédé de fonctionnement du moyen de détection - Google Patents

Moyen de détection pour une butée de débrayage centrale d'embrayage, butée de débrayage centrale d'embrayage et procédé de fonctionnement du moyen de détection Download PDF

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Publication number
WO2017153027A1
WO2017153027A1 PCT/EP2017/000111 EP2017000111W WO2017153027A1 WO 2017153027 A1 WO2017153027 A1 WO 2017153027A1 EP 2017000111 W EP2017000111 W EP 2017000111W WO 2017153027 A1 WO2017153027 A1 WO 2017153027A1
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WO
WIPO (PCT)
Prior art keywords
sensor
signal
displacement
sig
movable component
Prior art date
Application number
PCT/EP2017/000111
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German (de)
English (en)
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WO2017153027A8 (fr
Inventor
Franck-Peter KLÜCK
Tobias Schulz
Original Assignee
Wabco Gmbh & Co. Ohg
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 Wabco Gmbh & Co. Ohg filed Critical Wabco Gmbh & Co. Ohg
Publication of WO2017153027A1 publication Critical patent/WO2017153027A1/fr
Publication of WO2017153027A8 publication Critical patent/WO2017153027A8/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D25/00—Fluid-actuated clutches
    • F16D25/08—Fluid-actuated clutches with fluid-actuated member not rotating with a clutching member
    • F16D25/082—Fluid-actuated clutches with fluid-actuated member not rotating with a clutching member the line of action of the fluid-actuated members co-inciding with the axis of rotation
    • F16D25/083—Actuators therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2300/00—Special features for couplings or clutches
    • F16D2300/18—Sensors; Details or arrangements thereof

Definitions

  • the invention relates to a sensor device for a Kupplungszentralausschreiber, arranged with a radially outer periphery of the Kupplungszentralausschreibers first displacement sensor for contactless detection of the position of an axially movable component of the Kupplungszentralausschreibers, with a first signal transmitter, which is connected to the movable component, and with a first signal sensor which is connected to a fixed component of the Kupplungszentralausschreibers and disposed radially above the first signal transmitter and is in operative connection therewith, wherein the first signal transmitter together with the movable component of the Kupplungszentralausschreibers along a longitudinal axis of the first signal sensor is linearly displaceable.
  • the invention relates to a method for determining the position of an axially movable component of a Kupplungszentralausschreibers with such a sensor device and a Kupplungszentralausschreiber for performing this method.
  • Kupplungszentralausschreiber be used for disengaging and engagement of clutches, for example in drive trains of motor vehicles. They are known in various embodiments.
  • a Kupplungszentralausschreiber usually has a ring-cylindrical piston which is axially displaceably mounted within a receiving body and is arranged concentrically to an axially immediately adjacent coupling and coaxially about a shaft or about its axis of rotation.
  • the actuation of the clutch is usually carried out by means of a release bearing, which is designed for example as an angular contact ball bearing. In this one of the two bearing rings is rotatable and the other bearing ring rotatably disposed on said piston.
  • a plate spring of the clutch is axially supported, which clamps one or more clutch plates between a pressure plate and a counter-pressure plate of the clutch in the engaged state, so that a force or friction produced for torque transmission in the drive train is.
  • Essential information for the control of the clutch and any auxiliary units whose function depends on the opening and closing state of the clutch is the respective axial position of the piston of the clutch central release and thus the exact position of the release bearing.
  • a sensor device is arranged on the clutch central release device, which is based on a contactless, linear displacement measurement.
  • a ferromagnetic element serves as a signal transmitter, which is moved along with the aforementioned piston during its movement.
  • a signal sensor detects the position of the magnet and transmits corresponding signal values to an evaluation unit, which cooperates with a control and regulating device for the clutch.
  • PLCD sensors Permanent Magnetic Linear Contactless Displacement
  • the operating principle is based on the movement of a permanent magnet along a soft iron core, which is surrounded over its entire length with a primary coil and has two additional secondary coils at its axial ends.
  • the permanent magnet serves as a measuring object, which leads to a magnetic saturation in an immediately adjacent and localized zone of the soft iron core.
  • the respective position of the saturation zone can be determined via a sensor electronics, which is electrically connected to the coils. During a movement of the measurement object along the sensor axis, the respective position of the measurement object can thus be detected.
  • Hall sensors are also known for detecting a linearly movable component along a measuring path, in which a magnetic field is induced by a moving permanent magnet and a Hall voltage is measured as the output signal, depending on the magnetic field strength.
  • a linear Hall sensor device is For example, from DE 10 2007 021 231 A1 known.
  • Various Kupplungszentralaus Weger with PLCD or Hall sensor devices for position detection are known for example from DE 10 201 1 102 813 A1, DE 10 2010 018 773 A1, DE 10 2008 057 644 A1 and DE 20 2006 014 024 U1.
  • the known sensor devices for Kupplungszentralaus Weger for position detection have a signal generator and a signal transmitter associated with the signal sensor.
  • the signal generator is arranged radially on the outside of a moving part of the central release mechanism, such as a piston, or mechanically coupled thereto, so that it is moved linearly with the moving part of the central release mechanism upon disengagement of the clutch.
  • the signal sensor is arranged with a sensor electronics radially above the signal transmitter and in relation to this stationary, for example on a clutch or transmission housing. It detects the signal transmitter by means of one of the measuring principles mentioned above and uses the sensor electronics to determine its respective axial position.
  • the signal generator is, for example, a small ferromagnetic box-shaped magnetic element which is immovably connected to the release piston and axially displaceable with the release piston along the longitudinal axis of the signal sensor, whereby the position of the release bearing and thus the operating state of the clutch can be determined.
  • tilting moments on the piston can cause periodic noise of the sensor signal on the frequency of the rotational speed of the clutch. Due to the susceptibility of the measurement accuracy of the known position sensors for tilting moments due to external forces results in an inaccuracy for the detection of the actual position of the clutch, which may adversely affect the clutch control.
  • the invention is therefore based on the object to present a sensor device for a Kupplungszentralausschreiber, with an accurate and reliable detection of the position of an axially movable component of the Kupplungszentralausschreiber is possible.
  • Another object of the invention is to provide a method for determining the position of an axially movable component of a Kupplungszentralausschreibers with such a sensor device.
  • such a sensor device should be suitable for a Kupplungszentralausschreiber for disengaging a vehicle clutch.
  • the invention is based on the recognition that a non-contact displacement measurement on a clutch with a clutch central release, which is carried out by means of a single linear displacement sensor with a moving signal generator and a signal receiver standing relatively thereto, due to constructive, production-related and / or dynamic tolerances, which in the arrangement can occur, can be faulty.
  • an additional displacement sensor which also scans the path to be measured, but is arranged so that its inaccuracy in the displacement measurement counteracts the inaccuracy of the first sensor, these errors are compensated or at least reduced.
  • the invention is therefore based on a sensor device for a Kupplungszentralausschreiber, with a radially outer periphery of the Kupplungszentralausschreibers arranged first displacement sensor for contactless detection of the position of an axially movable component of the Kupplungszentralausschreibers, with a first signal transmitter, which is connected to the movable component, and with a first signal sensor, which is connected to a fixed component of the clutch central release and is arranged radially above the first signal transmitter and with this is in operative connection, wherein the first signal transmitter is linearly displaceable along with a longitudinal axis of the first signal sensor together with the movable component of the Kupplungszentralausschreibers.
  • the invention provides that in addition to the first displacement sensor, a second displacement sensor is arranged diametrically opposite to the first displacement sensor on the Kupplungszentralausschreiber, that the second displacement sensor has a second signal transmitter, which is connected to the movable component that second displacement sensor having a second signal sensor, which is connected to the fixed component of the Kupplungszentralausschreibers and radially disposed over the second signal transmitter and is operatively connected therewith, that the second signal transmitter along with the movable component along a longitudinal axis of the second signal sensor is linearly displaceable that the sensor device has evaluation electronics, which are signal-technically connected to the first displacement sensor and to the second displacement sensor, in that the evaluation electronics are designed in such a way that the output signals of the two We Gsensoren are linked to each other, that from the axial position of the movable component with respect to the fixed component of the Kupplungszentralausgurers can be determined, and that the evaluation of this position reproducing an output signal can be generated.
  • an output signal can be generated by means of evaluation electronics, from which the above-mentioned signal inaccuracy is eliminated or at least considerably reduced by the described tilting effect.
  • the sensor device is thus suitable for meeting future increased functional safety requirements for clutch controls.
  • the two displacement sensors are designed as permanent magnetic linear contactless displacement sensors (PLCD) that the signal transmitter of the displacement sensors are formed as cuboid or rod-shaped permanent magnet elements which are connected to an axially movable piston of the Kupplungszentralaus Wegers that the signal sensor of the displacement sensors as elongated cores, consisting of a soft magnetic material, are formed, which are each surrounded by a primary coil and two end secondary coils, which are electrically connected to a sensor electronics, and that the displacement sensors are connected to a fixed relative to the piston housing part ,
  • PLCD permanent magnetic linear contactless displacement sensors
  • the PLCD technique utilizes a linear displacement magnetic sensor array which relies on the generation of local saturation in a core of soft magnetic material, such as a soft iron core.
  • a permanent magnet When a permanent magnet is moved along the soft iron core, it induces local magnetic saturation in the soft iron core as it approaches its respective position.
  • This saturation position can be detected by means of a coil arrangement which surrounds the soft magnetic core and forms a differential transformer.
  • a differential transformer for transforming the information about a location into an electrical variable, reference is made, for example, to DE 23 25 752 A1.
  • the sensor device according to the invention has two such PLCD sensors. Since PLCD elements are operated in the saturation region, they are relatively insensitive to field strength fluctuations and temperature influences on the magnetic material. These sensors are therefore for the relatively harsh environment of a Kupplungszentralaus Wegers, for example in the drive train of a Truck, particularly advantageous use. It should be noted at this point that basically all non-contact linear displacement sensors are suitable for the sensor device according to the invention.
  • the invention relates to a method for determining the position of an axially movable component of a Kupplungszentralaus Wegers with a sensor device which has two displacement sensors and an evaluation of their output signals evaluating the procedural task.
  • the sensor device mentioned basically also has more than two linear displacement sensors arranged in a suitable manner can, whose measurement inaccuracies are each pairwise opposed, such that cancel by an averaging of the sensor signals these inaccuracies in a resulting signal against each other.
  • the accuracy in the position determination of the piston of the clutch central release or in the determination of the operating state of the clutch can be further increased.
  • the invention also relates to a Kupplungszentralaus Weger, such as a pneumatically actuated, arranged concentrically to a commercial vehicle clutch slave cylinder, with a sensor device for contactless detection of the position of an axially movable component of the slave cylinder, which is designed according to one of the device claims, and which for implementing a method according to one of the method claims is operable.
  • a Kupplungszentralaus Weger such as a pneumatically actuated, arranged concentrically to a commercial vehicle clutch slave cylinder, with a sensor device for contactless detection of the position of an axially movable component of the slave cylinder, which is designed according to one of the device claims, and which for implementing a method according to one of the method claims is operable.
  • the figure shows a schematically simplified Kupplungszentralausschreiber 2.
  • An actual Kupplungszentralausschreiber can be constructed in a known per se, for example, as a concentric slave cylinder for disengaging a vehicle clutch in a drive train.
  • the figure merely serves to clarify the arrangement of a sensor device 1 according to the invention on such a clutch central release device 2.
  • the Kupplungszentralaus Weger 2 has a designed as a ring-cylindrical piston 3 movable component.
  • the piston 3 is arranged to be axially movable in a fixed component 4 designed as a cup-shaped receiving body.
  • This fixed component 4 is also referred to below as the housing of the clutch central release 2.
  • the piston 3 and the housing 4 are arranged concentrically to a clutch, not shown, coaxially over a shaft 5, which is usually a transmission input shaft with a rotation axis 6.
  • the piston 3 is with coupled to a release bearing 7, which is here only exemplarily designed as a deep groove ball bearing, the outer ring 8 is rotatably connected to the piston 3.
  • the inner ring 9 of the release bearing 7 is rotatable with respect to the stationary outer ring 8 and the piston 3.
  • a plate spring 22 of a friction clutch is supported axially.
  • This friction clutch is one that is closed in the unactuated state. In the engaged state, the plate spring 22 thus clamps one or more clutch plates between a pressure plate and a counter-pressure plate of the friction clutch, so that a force or frictional connection is produced for torque transmission in the drive train.
  • the release bearing 7 is biased via the piston 3 by means of a preload spring 10 axially in the direction of the disc spring 22.
  • the preload spring 10 is disposed in a piston chamber 1 1, which is bounded by the piston 3 and the housing 4 of the Kupplungszentralausgurers 2, and it is based with its two ends axially on these two components 3, 4 from.
  • the piston 3 can be acted upon by a pneumatic or hydraulic pressure force.
  • a corresponding pressure is built up in a pressure chamber 1 1, which acts on the piston 3 in the release direction.
  • the pressure chamber 1 1 is pressure-tightly sealed by unspecified sealing elements, which are arranged radially between the piston and the housing 4.
  • the sensor device 1 has two non-contact PLCD displacement sensors 13, 14.
  • the first displacement sensor 13 consists of a first signal transmitter 15 and a first signal receiver 16.
  • the signal transmitter 15 is designed as a cuboid perma Magnetic element formed and arranged on a holder 23 which is itself firmly connected to the piston 3. As a result, during an axial movement of the piston 3, the holder 23 and with this the signal generator 15 is moved.
  • the signal pickup 16 is formed as a stationary with respect to the signal generator 15 component, which is arranged radially above the signal generator 15 and adjacent thereto.
  • the signal sensor 16 is integrated in the illustrated embodiment in a housing part 24, which together with the fixed component 4, that is the housing of the clutch central release 2, may be connected to a transmission housing, not shown.
  • the Signalauf choir 16 has a rod-shaped, soft magnetic core, which is surrounded by a primary coil in its length and two secondary coils at its axial ends. It also includes a sensor electronics, which is electrically connected to the coils. The primary coil, the two secondary coils and the sensor electronics are not shown, but the skilled person known per se. Due to the influence of the signal generator 15, a locally limited magnetic saturation is generated in the soft magnetic core of the signal receiver 16 at the current axial position, which produces an output signal SIG 1 in the sensor electronics. The output signal SIG_1 thus depends on the position of the saturation relative to the lateral secondary coils, in accordance with the operation of a differential transformer.
  • a second displacement sensor 14 is arranged diametrically opposite to the first displacement sensor 13 on the outer circumference of the clutch central release 2.
  • the second displacement sensor 14 consists of a second signal generator 17 and a second signal sensor 18 such that they are like the first position sensor 13.
  • the second signal generator 17 therefore generates a locally close in the soft magnetic core of the second signal sensor 18 at its current axial position limited magnetic saturation, which generates a second output signal Sig_2 in the sensor electronics.
  • the two displacement sensors 13, 14 are connected via signal lines 20, 21 with a transmitter 19. This evaluation 19 is connected to a not shown control and regulating device for the clutch control in signaling connection or is integrated into the same structurally.
  • the plate spring 22 presses with an axial force F1 on the inner ring 9 of the release bearing 7. If the disc spring 22 with respect to the inner ring 9 of the release bearing 7 due to manufacturing and / or assembly tolerances is not installed exactly coaxial, or free ends of the spring tongues of the plate spring 22 are not all arranged exactly in a plane, the plate spring 22 generates on the inner ring 9 different axial forces F1, F2, which is greatest where the plate spring 22 is the inner ring 9 axially closest to.
  • a greater axial force F1 acts on the inner ring 9 in the upper half of the drawing, and in the region of the lower half of the drawing, diametrically opposite, a somewhat smaller axial force F2 on the inner ring 9.
  • the two displacement sensors 13, 14 generate according to their respective relative axial positions of their signal generator 15, 17, a first sensor signal SIG_1 and a second Sensor signal SIG_2.
  • a first sensor signal SIG_1 and a second Sensor signal SIG_2 are all components of Kupplungszentralaus Weger 2 and coupling arranged exactly concentric to each other and the axial force of the plate spring 22 is completely uniform over the circumference, ie without a resultant force vector in the radial direction, then the piston 3 would move without tilting in the housing 4.
  • the two sensor signals SIG_1, SIG_2 would then ideally match exactly.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)

Abstract

L'invention concerne un moyen de détection (1) pour une butée de débrayage centrale d'embrayage (2), comprenant un premier capteur de course (13) disposé sur la périphérie radialement extérieure de la butée de débrayage (2) pour détecter la position d'un composant (3) mobile axialement de la butée de débrayage (2), un premier émetteur de signaux (15) qui est relié au composant (3) mobile, et un premier récepteur de signaux (16) qui est relié à un composant (4) fixe de la butée de débrayage et disposé radialement au-delà du premier émetteur de signaux et est en liaison fonctionnelle avec celui-ci, le premier émetteur de signaux étant déplaçable linéairement le long d'un axe longitudinal du premier récepteur de signaux (16), conjointement avec le composant (3) mobile. Selon l'invention, un deuxième capteur de course (14) est disposé de manière diamétralement opposée au premier capteur de course (13) sur la butée de débrayage (2), le deuxième capteur de course (14) comprend un deuxième émetteur de signaux (17) qui est relié au composant (3) mobile, le deuxième capteur de course comprend un deuxième récepteur de signaux (18) qui est relié au composant (4) fixe de la butée de débrayage et disposé radialement au-delà du deuxième émetteur de signaux et en liaison fonctionnelle avec celui-ci, le deuxième émetteur de signaux est déplaçable linéairement le long d'un axe longitudinal du deuxième récepteur de signaux (18), conjointement avec le composant (3) mobile, le moyen de détection comprend une électronique d'évaluation (19) qui est reliée par transmission de signaux aux deux capteurs de course, et l'électronique d'évaluation est conçue de telle sorte qu'à l'aide de celle-ci, les signaux de sortie des deux capteurs de course peuvent être combinés de telle sorte que la position axiale du composant (3) mobile peut être déterminée à partir de ceux-ci.
PCT/EP2017/000111 2016-03-05 2017-01-30 Moyen de détection pour une butée de débrayage centrale d'embrayage, butée de débrayage centrale d'embrayage et procédé de fonctionnement du moyen de détection WO2017153027A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016002823.8 2016-03-05
DE102016002823.8A DE102016002823A1 (de) 2016-03-05 2016-03-05 Sensoreinrichtung für einen Kupplungszentralausrücker, Kupplungszentralausrücker sowie Verfahren zum Betreiben der Sensoreinrichtung

Publications (2)

Publication Number Publication Date
WO2017153027A1 true WO2017153027A1 (fr) 2017-09-14
WO2017153027A8 WO2017153027A8 (fr) 2017-11-30

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DE (1) DE102016002823A1 (fr)
WO (1) WO2017153027A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110219903A (zh) * 2019-05-31 2019-09-10 陕西法士特齿轮有限责任公司 一种中央式离合器执行机构
CN111677779A (zh) * 2019-03-11 2020-09-18 舍弗勒技术股份两合公司 分离单元以及离合器装置
US20230167861A1 (en) * 2021-12-01 2023-06-01 Dana Automotive Systems Group, Llc Systems and methods for driveline control
CN110219903B (zh) * 2019-05-31 2024-06-04 陕西法士特齿轮有限责任公司 一种中央式离合器执行机构

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EP2128456A2 (fr) * 2008-05-26 2009-12-02 Toyota Jidosha Kabusiki Kaisha Détecteur de position de piston
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DE102014208695A1 (de) * 2013-05-10 2014-11-13 Schaeffler Technologies Gmbh & Co. Kg Sensorsystem mit integrierter Führung und Verdrehsicherung im CRS

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DE2325752A1 (de) 1973-05-21 1974-12-12 Siemens Ag Einrichtung zur umformung eines wegs in eine elektrische groesse
DE10230090A1 (de) * 2001-07-13 2003-01-23 Sony Prec Technology Inc Elektromagnetische Kupplung
EP1801445A1 (fr) * 2005-12-23 2007-06-27 Renault Embrayage à friction commandé automatiquement
DE102007021231A1 (de) 2006-05-26 2007-11-29 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Positionssensor zum Erfassen der Position eines entlang einer Messstrecke linear bewegbaren Gegenstands
DE202006014024U1 (de) 2006-09-08 2006-11-09 Fte Automotive Gmbh Zentralausrücker für eine hydraulische Kupplungsbetätigung
DE102008057644A1 (de) 2007-12-03 2009-06-04 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Wegmesssystem für Kupplungsausrücksysteme
EP2128456A2 (fr) * 2008-05-26 2009-12-02 Toyota Jidosha Kabusiki Kaisha Détecteur de position de piston
DE102010018773A1 (de) 2009-05-13 2010-11-18 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Zentralausrücker
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111677779A (zh) * 2019-03-11 2020-09-18 舍弗勒技术股份两合公司 分离单元以及离合器装置
CN110219903A (zh) * 2019-05-31 2019-09-10 陕西法士特齿轮有限责任公司 一种中央式离合器执行机构
CN110219903B (zh) * 2019-05-31 2024-06-04 陕西法士特齿轮有限责任公司 一种中央式离合器执行机构
US20230167861A1 (en) * 2021-12-01 2023-06-01 Dana Automotive Systems Group, Llc Systems and methods for driveline control
US11767893B2 (en) * 2021-12-01 2023-09-26 Dana Automotive Systems Group, Llc Systems and methods for driveline control

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WO2017153027A8 (fr) 2017-11-30
DE102016002823A1 (de) 2017-09-07

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