DE10133163A1 - measuring system - Google Patents

measuring system

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Publication number
DE10133163A1
DE10133163A1 DE10133163A DE10133163A DE10133163A1 DE 10133163 A1 DE10133163 A1 DE 10133163A1 DE 10133163 A DE10133163 A DE 10133163A DE 10133163 A DE10133163 A DE 10133163A DE 10133163 A1 DE10133163 A1 DE 10133163A1
Authority
DE
Germany
Prior art keywords
measuring system
piston
master cylinder
tandem master
magnet
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.)
Withdrawn
Application number
DE10133163A
Other languages
German (de)
Inventor
Alexander Braun
Olivier Masson
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
Priority to DE10133163A priority Critical patent/DE10133163A1/en
Priority to PCT/DE2002/000489 priority patent/WO2002066307A2/en
Publication of DE10133163A1 publication Critical patent/DE10133163A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • G01D5/14—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 the magnitude of a current or voltage
    • G01D5/142—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 the magnitude of a current or voltage using Hall-effect devices
    • G01D5/147—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 the magnitude of a current or voltage using Hall-effect devices influenced by the movement of a third element, the position of Hall device and the source of magnetic field being fixed in respect to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
    • B60Q1/44—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating braking action or preparation for braking, e.g. by detection of the foot approaching the brake pedal
    • B60Q1/441—Electric switches operable by the driver's pedals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/18—Safety devices; Monitoring
    • B60T17/22—Devices for monitoring or checking brake systems; Signal devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/28—Means for indicating the position, e.g. end of stroke
    • F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
    • F15B15/2861—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT using magnetic means
    • 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
    • G01D5/14—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 the magnitude of a current or voltage
    • G01D5/142—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 the magnitude of a current or voltage using Hall-effect devices
    • G01D5/145—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 the magnitude of a current or voltage using Hall-effect devices influenced by the relative movement between the Hall device and magnetic fields

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Transmission Of Braking Force In Braking Systems (AREA)

Abstract

The invention relates to a measuring system for determining the position of a piston (11) in an automotive brake system . A measuring element (26) is arranged in the region (22) of the piston (11) of the tandem main cylinder (10). Relatively sensitive measurement is possible since the measuring element (16) is disposed in a non-pressurized area (22) of the tandem main cylinder (10) and in the region of at least one thin wall of the housing of the tandem main cylinder (10).

Description

Stand der TechnikState of the art

Die Erfindung betrifft einen Bremslichtschalter (BLS) im Fahrzeug. Dieser hat die Aufgabe das Bremsen des Fahrzeugfahrers eines Fahrzeuges zu erfassen. Dieses Signal kann dann dazu genutzt werden die Bremsleuchten am Fahrzeuge entweder direkt zum Erleuchten zu bringen oder mit Hilfe eines Bordnetzsteuergeräts mit integriertem Leistungstreiber inklusive Lampenausfallskontrolle geschehen.The invention relates to a brake light switch (BLS) in Vehicle. This has the task of braking the Vehicle driver to record a vehicle. This signal the brake lights on the vehicle can then be used either to illuminate directly or with help an onboard power supply control unit with integrated power driver including lamp failure control.

Ein solcher BLS befindet sich bis heute am Bremspedal im Fahrgastinnenraum. Dabei handelt es sich hier um eine mechanisch redundant ausgelegten BLS der zwei digitale gegenläufige Signale erzeugt. Da dieser Schalter möglichst früh den Bremswunsch des Fahrers erkennen soll und das Erleuchten des Bremslichtes ohne Betätigung des Bremspedals verhindert werden muß wird dieser in der Fertigung der Automobilhersteller am Bremspedal montiert. Dies geschieht als Justageprozess um Toleranzen am Pedal auszugleichen und Schaltschwellen zu definieren.Such a BLS is still on the brake pedal in Passenger compartment. This is a mechanically redundant BLS of the two digital opposite signals are generated. Since this switch if possible should recognize the driver's braking request early and that Illumination of the brake light without actuating the brake pedal this must be prevented in the manufacture of the Car manufacturer mounted on the brake pedal. this happens as an adjustment process to compensate for tolerances on the pedal and Define switching thresholds.

Da sich die Anforderungen eines Fahrzeuges ständig steigern und der BLS nicht nur zum Einschalten der Bremsleuchten genutzt werden sondern auch von einem Motorsteuergerät und einem höherwertigen Bremssystem, wie ABS, ASR, ESP und EHB zur Plausibilisierung des Bremsvorgangs genutzt wird, ist die Anforderung an die Genauigkeit der Schaltschwellen und die Lebensdauer des BLS ständig gestiegen.Because the requirements of a vehicle are constantly increasing and the BLS not only for switching on the brake lights  but are also used by an engine control unit and a higher quality braking system such as ABS, ASR, ESP and EHB is used to check the plausibility of the braking process the requirement for the accuracy of the switching thresholds and the lifespan of the BLS has increased continuously.

Daher verwendet man neuerdings elektronische Hallschalter am Pedal um die Lebensdaueranforderungen zu gewährleisten. Diese können allerdings nicht verhindern, daß der Schalter weiterhin justiert werden muß. Für den Automobilhersteller bedeutet dies einen erhöhten Aufwand in der Montage. Auch die Veränderung der Schaltpunkte durch Deformierung des Bremspedals kann nicht verhindert werden, so dass zwar eine Verbesserung der Lebensdauer des Schalters erzielt wurde aber nicht die Genauigkeit der Schaltschwellen über Lebensdauer.Therefore, electronic reverb switches have recently been used on Pedal to ensure the lifetime requirements. However, these cannot prevent the switch still needs to be adjusted. For the automobile manufacturer this means an increased effort in assembly. Also the change of the switching points by deforming the Brake pedals cannot be prevented, so a Improved switch life was achieved but not over the accuracy of the switching thresholds Lifespan.

Aus der EP 0 480 608 B1 ist ein Warnsystem für den Hub eines Bremspedals bekannt. Hier ist außerhalb des Tandemhauptzylinders (THZ) des Bremssystems ein Magnet angeordnet. Dieser Magnet befindet sich im druckbeaufschlagten Bereich und wirkt mit einem Reed- Schalter zusammen. Da der Magnet am Ende des Kolbens sich befindet, kann er nur eine Endstellung, d. h. hier eine Warnfunktion detektiert werden. Ferner weist das Gehäuse des Zylinders eine einheitliche Dicke auf, die die Empfindlichkeit des Systems beeinträchtigt.EP 0 480 608 B1 describes a warning system for the lifting of a Brake pedals known. Here is outside of Tandem master cylinder (THZ) of the brake system is a magnet arranged. This magnet is in the pressurized area and acts with a reed Switches together. Because the magnet is at the end of the piston is, it can only one end position, d. H. here one Warning function can be detected. Furthermore, the housing of the Cylinders have a uniform thickness that the System sensitivity affected.

Die Aufgabe der Erfindung war es nun ein Messsystem zu konstruieren, das nicht nur die Lebensdauer eines bisherigen Bremslichtschalters deutlich erhöht, sondern auch garantiert, daß die Schaltflanken des Messsystems über die Lebensdauer sich nur minimal bis gar nicht verändern. Auch der Justageprozess in der Fertigung des Automobilherstellers sollte entfallen, so dass die Bremse mit integriertem Messsystem vom Bremsenhersteller geliefert wird und vom Kunden nur noch mit einem Stecker an das Bordnetzsteuergerät verbunden werden muß. Desweiteren sollte auch eine einfache Austauschbarkeit im Reparaturfall in der Werkstatt gewährleistet sein.The object of the invention was to provide a measuring system construct that not only the lifespan of a previous one Brake light switch significantly increased, but also guarantees that the switching edges of the measuring system over the Service life changes only minimally or not at all. Also the adjustment process in the manufacture of the automobile manufacturer  should be omitted so that the brake with integrated Measuring system is supplied by the brake manufacturer and by Customers only with a plug to the vehicle electrical system control unit must be connected. It should also be a simple one Interchangeability in the event of a repair in the workshop to be guaranteed.

Vorteile der ErfindungAdvantages of the invention

Vorteil der Erfindung ist es, dass daß Messsystem am Tandemhauptzylinder montiert wird. Dies geschieht ohne daß ein Justagevorgang stattfinden muss. Da sich der Tandemhauptzylinder über die Lebensdauer nicht verändert, wird sich der Bewegungsablauf des Magneten oder des ferromagnetischen Materials auch über die Lebenszeit nicht verändern. Desweiteren wird dort detektiert wo der Druckaufbau für die Bremsen stattfindet. Daher kann man sicher sei, dass ein Bremsvorgang eingeleitet wurde, wenn der Sensor aktiviert wird. Da sich der Gesamtaufbau im Motorenraum befindet, ist der Sensor bei geeigneter Anbindung zum Beispiel durch das Anschrauben mit einer oder zwei Schraüben, beziehungsweise durch das Anklipsen des Sensors vor Veränderungen durch Fremdeinwirkungen geschützt. Desweiteren kann man den Sensor ohne Einstellaufwand montieren und tauschen.The advantage of the invention is that the measuring system on Tandem master cylinder is mounted. This happens without that an adjustment process must take place. Since the Tandem master cylinder has not changed over the service life, will the movement of the magnet or the ferromagnetic material not even over the lifetime change. Furthermore, it is detected where the Pressure build-up for the brakes takes place. Therefore one can be sure that braking was initiated when the sensor is activated. Since the overall structure in Engine compartment is located, the sensor is suitable Connection, for example, by screwing on with a or two screws, or by clipping on the Sensor protected against changes due to external influences. Furthermore, the sensor can be adjusted without any effort assemble and replace.

Zeichnungdrawing

Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Die Figuren zeigen einen Längsschnitt durch den Tandemhauptzylinder eines Bremssystems für ein Kraftfahrzeug mit dem Messsystem. Embodiments of the invention are in the drawing shown and in the following description explained. The figures show a longitudinal section through the Tandem master cylinder of a brake system for a motor vehicle with the measuring system.  

Beschreibung der AusführungsbeispieleDescription of the embodiments

In den Figuren ist ein als Detail eines Bremssystems für ein Kraftfahrzeug der Tandemhauptzylinder 10 dargestellt. Mit 11 ist der doppelwirkende Kolben bezeichnet, zu dessen beiden Seiten die beiden Druckräume 12 und 13 angrenzen. Der Druckraum 12 ist von einer Wandung 15 abgeschlossen, an der sich die Antriebsstange 16 bzw. eine Verbindungsstange zum Bremspedal anschließt. In den beiden Druckräumen 12, 13 ist jeweils eine Feder 18, 19 angeordnet, die sich an der jeweiligen Stirnseite des Kolbens 11 abstützt. Der Kolben 11 ist zu den beiden Druckräumen 12, 13 hin jeweils mit einer Dichtlippe 20, 21 abgedichtet, so daß sich im Bereich des Kolbens 11, d. h. zwischen den Dichtlippen 20, 21 ein nahezu druckloser Bereich 22 befindet. Zumindest in diesem Bereich 22 muß das Gehäuse 24 des Tandemhauptzylinders 10 aus magnetisch nicht leitendem Material bestehen. Am Kolben 11 ist ferner ein Magnet 25 angeordnet, der mit einem magnetfeldempfindlichen Element 26 in Wirkverbindung steht. Das Element 26 ist an der Außenwand des Tandemhauptzylinders 10 im Bereich des Kolbens 11 angeordnet. Als Element 26 kann ein Hall-, AMR-(Anisotrop Magnetoresistiv) oder GMR-(Gigant Magnetoresistiv) Effekt benutzt werden, die auch die Möglichkeit bieten, den Magneten 25 durch ein magnetisch leitendes Material zu ersetzen und den Magnet an das Element 26 zu integrieren, hierbei kann es sich bei dem Messelement 26 um ein redundantes, teilredundantes oder einfaches Messsystem handeln. Im Bereich des Kolbens 11 ist die Außenwand des Tandemhauptzylinders 10 geringer als im übrigen Bereich des Tandemhauptzylinders 10 ausgebildet. Dadurch ist eine relative unempfindliche Messung möglich. Da ferner die Messung im drucklosen Bereich 22 stattfindet, ist sie unabhängig von den herrschenden Drücken und Belastungen. Wie insbesondere aus der Fig. 2 ersichtlich ist, kann das Gehäuse des Elements 26 in die durch die Verdünnung der Außenwand des Tandemhauptzylinders 10 gebildeten Ausnehmung 28 eingesetzt werden und auch an der Wand des Tandemhauptzylinders 10 mit einem Flansch 29 anliegen. Dadurch ist bereits eine Grundjustage möglich. In Fig. 3 ist das Element 26 in einen Durchbruch 31 oder z. B. einer Bohrung angeordnet. Dadurch wird die Messempfindlichkeit nochmals verbessert. Da die Messung im drucklosen Bereich 22 erfolgt, braucht das übrige Bremssystem nicht verändert zu werden, bzw. wird es nicht beeinflußt. Das Element 26 kann durch den Durchbruch 31 hindurchragen und z. B. innen bündig abschließen oder wie in der Fig. 3 gezeigt mit dem Flansch 29 an der Außenseite des Tandemhauptzylinders 10 anliegen und so wieder vorjustiert sein.In the figures, a tandem master cylinder 10 is shown as a detail of a brake system for a motor vehicle. The double-acting piston is designated by 11 , on the two sides of which the two pressure chambers 12 and 13 adjoin. The pressure chamber 12 is closed by a wall 15 to which the drive rod 16 or a connecting rod to the brake pedal connects. In each of the two pressure chambers 12 , 13 there is a spring 18 , 19 which is supported on the respective end face of the piston 11 . The piston 11 is sealed off from the two pressure chambers 12 , 13 by a sealing lip 20 , 21 , so that there is an almost pressure-free area 22 in the area of the piston 11 , ie between the sealing lips 20 , 21 . At least in this area 22 , the housing 24 of the tandem master cylinder 10 must consist of magnetically non-conductive material. A magnet 25 is also arranged on the piston 11 and is in operative connection with a magnetic field-sensitive element 26 . The element 26 is arranged on the outer wall of the tandem master cylinder 10 in the region of the piston 11 . A Hall, AMR (anisotropic magnetoresistive) or GMR (gigant magnetoresistive) effect can be used as the element 26 , which also offer the possibility of replacing the magnet 25 with a magnetically conductive material and integrating the magnet onto the element 26 , the measuring element 26 can be a redundant, partially redundant or simple measuring system. In the area of the piston 11 , the outer wall of the tandem master cylinder 10 is made smaller than in the rest of the area of the tandem master cylinder 10 . This enables a relatively insensitive measurement. Furthermore, since the measurement takes place in the unpressurized area 22 , it is independent of the prevailing pressures and loads. As can be seen in particular from FIG. 2, the housing of the element 26 can be inserted into the recess 28 formed by the thinning of the outer wall of the tandem master cylinder 10 and can also rest against the wall of the tandem master cylinder 10 with a flange 29 . This means that basic adjustment is already possible. In Fig. 3, the element 26 is in an opening 31 or z. B. arranged a hole. This further improves the measuring sensitivity. Since the measurement takes place in the unpressurized area 22 , the rest of the brake system need not be changed or is not influenced. The element 26 can protrude through the opening 31 and z. B. flush inside or as shown in Fig. 3 with the flange 29 on the outside of the tandem master cylinder 10 and so be pre-adjusted again.

Claims (9)

1. Messsystem zur Bestimmung der Position eines Kolbens (11) eines Bremssystemes für ein Kraftfahrzeug mit mindestens einem Tandemhauptzylinder (10) dessen Kolben (11) zwei Druckräume (12, 13) trennt, wobei im Bereich des Kolbens (11) ein magnetfeldempfindliches Element 26 angeordnet ist, und sich das Element (26) im Bereich eines zumindest gegenüber der übrigen Wand des Tandemhauptzylinders (10) dünneren Wandbereiches (28, 31) befindet und wobei das Element (26) mit mindestens einem Magneten (25) in Wirkverbindung steht.1. Measuring system for determining the position of a piston ( 11 ) of a brake system for a motor vehicle with at least one tandem master cylinder ( 10 ) whose piston ( 11 ) separates two pressure chambers ( 12 , 13 ), a magnetic field-sensitive element 26 in the region of the piston ( 11 ) is arranged, and the element ( 26 ) is located in the region of a wall region ( 28 , 31 ) which is at least thinner than the remaining wall of the tandem master cylinder ( 10 ) and the element ( 26 ) is in operative connection with at least one magnet ( 25 ). 2. Messsystem nach Anspruch 1 dadurch gekennzeichnet, daß das Element (26) in einer Ausnehmung (28) des Gehäuses des Tandemhauptzylinders (10) angeordnet ist.2. Measuring system according to claim 1, characterized in that the element ( 26 ) in a recess ( 28 ) of the housing of the tandem master cylinder ( 10 ) is arranged. 3. Messsystem nach Anspruch 1 dadurch gekennzeichnet, daß das Element (26) in einem Durchbruch (31) des Gehäuses des Tandemhauptzylinders (10) angeordnet ist.3. Measuring system according to claim 1, characterized in that the element ( 26 ) in an opening ( 31 ) of the housing of the tandem master cylinder ( 10 ) is arranged. 4. Messsystem nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Magnet (25) auf dem Kolben (11) angeordnet ist.4. Measuring system according to one of claims 1 to 3, characterized in that the magnet ( 25 ) is arranged on the piston ( 11 ). 5. Messsystem nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Magnet (25) auf der Rückseite des Element (26) angeordnet ist und der Kolben (11) zumindest teilweise aus ferromagnetischem Material besteht. 5. Measuring system according to one of claims 1 to 3, characterized in that the magnet ( 25 ) on the back of the element ( 26 ) is arranged and the piston ( 11 ) consists at least partially of ferromagnetic material. 6. Messsystem nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das Element (26) ein Hall-Element ist.6. Measuring system according to one of claims 1 to 5, characterized in that the element ( 26 ) is a Hall element. 7. Messsystem nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das Element (26) ein Gigant Magnetoresistives (GMR) Element ist.7. Measuring system according to one of claims 1 to 5, characterized in that the element ( 26 ) is a giant magnetoresistive (GMR) element. 8. Messsystem nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das Element (26) ein Anisotrop Magnetoresistives (AMR) Element ist,8. Measuring system according to one of claims 1 to 5, characterized in that the element ( 26 ) is an anisotropic magnetoresistive (AMR) element, 9. Messsystem nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß das Element (26) mit Hilfe eines Flansches (29) an der Wandung des Tandemhauptzylinders (10) anliegt.9. Measuring system according to one of claims 1 to 8, characterized in that the element ( 26 ) by means of a flange ( 29 ) bears against the wall of the tandem master cylinder ( 10 ).
DE10133163A 2001-02-20 2001-07-07 measuring system Withdrawn DE10133163A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE10133163A DE10133163A1 (en) 2001-02-20 2001-07-07 measuring system
PCT/DE2002/000489 WO2002066307A2 (en) 2001-02-20 2002-02-12 Measuring system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10108102 2001-02-20
DE10133163A DE10133163A1 (en) 2001-02-20 2001-07-07 measuring system

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1449729A1 (en) * 2003-02-21 2004-08-25 ROBERT BOSCH GmbH Master-cylinder for vehicles with a system for detecting the braking action, in particular the position of the piston
EP1519157A2 (en) 2003-09-29 2005-03-30 ArvinMeritor Technology, LLC Hall effect displacement sensor
DE10352589A1 (en) * 2003-11-11 2005-06-16 Lucas Automotive Gmbh Main brake cylinder for a motor vehicle hydraulic brake system has attached measuring unit and movable piece to give electric signal on cylinder operation
FR2913937A1 (en) * 2007-03-22 2008-09-26 Bosch Gmbh Robert METHOD AND SERVOMOTOR FOR DETECTING THE BRAKE OF A VEHICLE AND METHOD OF MANUFACTURING SUCH A SERVOMOTOR
FR2919384A1 (en) * 2007-07-23 2009-01-30 Bosch Gmbh Robert Sliding part's i.e. control piston, axial displacement detecting device for e.g. hydraulic braking device of motor vehicle, has sensor provided with flexible detection unit, and one connection element oriented along radial direction
EP2072969A1 (en) * 2007-12-21 2009-06-24 Robert Bosch GmbH Linear sensor with angle transmission and movement by cable
DE102008020934A1 (en) * 2008-04-25 2009-10-29 Lucas Automotive Gmbh Master brake cylinder arrangement with actuation detection for a motor vehicle brake system and motor vehicle brake system
DE102013003270A1 (en) * 2013-02-27 2014-08-28 Helag Elektronik GmbH Device for detecting linear motion of e.g. actuator element of brake cylinder of e.g. car, has magnet moved relative to anisotropic magneto resistance sensor and whose length is less than magnet travel length along traverse direction
CN104662341A (en) * 2012-09-19 2015-05-27 舍弗勒技术股份两合公司 Piston having a sensor element
FR3020660A1 (en) * 2014-05-05 2015-11-06 Valeo Embrayages HYDRAULIC CONTROL DEVICE, ITS MANUFACTURING METHOD AND CLUTCH OR BRAKE CONTROL SYSTEM COMPRISING SAID DEVICE

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2851538A1 (en) * 2003-02-21 2004-08-27 Bosch Gmbh Robert MASTER CYLINDER OF A MOTOR VEHICLE WITH DEVICE FOR DETECTING THE OPERATION OF A BRAKING SYSTEM
EP1449729A1 (en) * 2003-02-21 2004-08-25 ROBERT BOSCH GmbH Master-cylinder for vehicles with a system for detecting the braking action, in particular the position of the piston
EP1519157A2 (en) 2003-09-29 2005-03-30 ArvinMeritor Technology, LLC Hall effect displacement sensor
EP1519157A3 (en) * 2003-09-29 2006-08-30 ArvinMeritor Technology, LLC Hall effect displacement sensor
US7240774B2 (en) 2003-09-29 2007-07-10 Arvinmeritor Technology, Llc Extended range hall effect displacement sensor
DE10352589A1 (en) * 2003-11-11 2005-06-16 Lucas Automotive Gmbh Main brake cylinder for a motor vehicle hydraulic brake system has attached measuring unit and movable piece to give electric signal on cylinder operation
DE10352589B4 (en) * 2003-11-11 2005-09-08 Lucas Automotive Gmbh Main brake cylinder for a motor vehicle hydraulic brake system has attached measuring unit and movable piece to give electric signal on cylinder operation
US8136892B2 (en) 2007-03-22 2012-03-20 Robert Bosch Gmbh Method and booster which are intended to detect the braking of a vehicle, and method of producing such a booster
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