WO2016008481A1 - Sensorsystem und kolben-zylinder-anordnung - Google Patents
Sensorsystem und kolben-zylinder-anordnung Download PDFInfo
- Publication number
- WO2016008481A1 WO2016008481A1 PCT/DE2015/200380 DE2015200380W WO2016008481A1 WO 2016008481 A1 WO2016008481 A1 WO 2016008481A1 DE 2015200380 W DE2015200380 W DE 2015200380W WO 2016008481 A1 WO2016008481 A1 WO 2016008481A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- magnet
- sensor system
- piston
- cylinder
- sensor
- Prior art date
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
- G01D5/145—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
-
- 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
-
- 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
- F16D48/00—External control of clutches
- F16D48/06—Control by electric or electronic means, e.g. of fluid pressure
- F16D48/066—Control of fluid pressure, e.g. using an accumulator
-
- 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
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/10—System to be controlled
- F16D2500/11—Application
- F16D2500/1107—Vehicles
-
- 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
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/30—Signal inputs
- F16D2500/302—Signal inputs from the actuator
- F16D2500/3026—Stroke
-
- 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
- G01D2205/00—Indexing scheme relating to details of means for transferring or converting the output of a sensing member
- G01D2205/40—Position sensors comprising arrangements for concentrating or redirecting magnetic flux
Definitions
- the invention relates to a sensor system, comprising at least one switching point sensor, which is mounted opposite a magnet, wherein the magnet passing the at least one switching point sensor is mechanically fastened to a linearly movable element.
- linear displacement measuring systems are used to detect the position of a piston of the clutch actuation system surrounded by a clutch master cylinder.
- sensor systems in such Linearwegmesssystemen displacement sensors are used, which according to the
- DE 10 2012 218 605 A1 work according to an inductive mode of action, wherein an electrically conductive target attached to the piston dips into a magnetic field of a coil arrangement and changes it.
- Other sensors use the Hall effect, in which the position of a magnet attached to the piston is sensed by at least one separate shift point sensor mounted on the cylinder.
- Such a linear displacement measuring system is known from DE 10 2012 219 183 A1.
- the invention has for its object to provide a sensor system and a piston-cylinder arrangement in which the cost of production are reduced, but still a highly accurate position detection is possible.
- the object is achieved in that at least one end of the axially magnetized magnet is sheathed parallel to its direction of movement at its outer periphery of a flux guide.
- the flux guide bundles the magnetic field built up by the magnet in the axial direction, whereby a high edge steepness of the flux density over the path of the magnet is achieved, resulting in a reduction of the switching tolerances. Due to this arrangement, it is possible to dispense with the use of rare-earth magnets and to use magnets with a lower energy density. The use of such magnets significantly reduces the costs for the sensor system.
- the flow guide elements made of a ferromagnetic material are sleeve-like. This design makes a simple mounting of the flux-conducting elements on the magnet possible.
- the flux guide completely covers a radially extending surface of the end of the magnet. This simplifies the manufacture of the flow guide body and the assembly of the sleeve-like flux guide body on the magnet.
- the magnet is designed as hard ferrite.
- the hard ferrite magnet is a particularly inexpensive magnet. Due to its low energy density, however, a larger magnet volume is usually necessary.
- the edge steepness of the magnetic field, which is preferably formed in a center of the measuring path, is increased by the sleeve-like flux guide elements.
- the magnet is cylindrical or cuboid or segment-shaped.
- the shape of the magnet can be adapted to the existing installation space in each case.
- On each of these magnetic shapes can easily put on a sleeve-like flux guide.
- a particularly good edge steepness of the flux density is achieved when each end of the magnet is encased by a flux guide, wherein the two flow guide elements are arranged spaced from each other.
- a development of the invention relates to a piston-cylinder arrangement, in particular for a clutch actuation system in a motor vehicle, with a piston which is arranged axially movable inside a cylinder, and a sensor system which has a magnet positioned on the piston and at least one on the cylinder attached switch point sensor comprises.
- the sensor system is designed according to at least one feature described in this patent application.
- each end of the axially magnetized magnet is encased parallel to its direction of movement on its outer periphery by a flux guide element, wherein the two flux guide elements are arranged spaced apart from one another.
- the flux guide elements made of a ferromagnetic material are designed sleeve-like.
- the sleeve-like design allows easy mounting of the flux-guiding elements on the magnet and ensures a tight fit of the flux-conducting element on the magnet during the application.
- 1 is a schematic diagram of a clutch actuation system
- 2 shows a first embodiment of a magnet according to the invention
- Fig. 8 shows another embodiment of the magnet.
- a clutch actuation system 1 is shown, as it is used today in motor vehicles.
- Such a clutch actuation system 1 has a donor cylinder which comprises a cylinder 2 in which a piston 3 is movably mounted.
- the piston 3 is actuated by the clutch pedal 4.
- the cylinder 2 is connected to a slave cylinder 9, which actuates a clutch 10.
- the adjustment of the position of the clutch 10 is due to the drive of the piston 3 by the clutch pedal 4.
- the master cylinder 2, 3 and the clutch 10 to the slave cylinder 9 are spatially separated in the vehicle.
- a switching point sensor 1 1 is arranged, which comprises an evaluation circuit and is connected to a control unit 5. This switching point sensor 1 1 is opposite to a permanent magnet 12 which is fixed within the cylinder 2 on the piston 3.
- the permanent magnet 12 is shown in more detail in FIG. It consists of a hard ferrite and is surrounded at its ends by a respective ferromagnetic sleeve 13, 14, which surround the permanent magnet 12 parallel to the direction of movement of the piston 3.
- the permanent magnet 12 is in this case formed as a hollow cylinder.
- the two ferromagnetic sleeves 13, 14 are separated by an axial gap 15. the separated.
- Curve A shows the flux density B of a hard magnet formed from permanent magnet 12 without the ferromagnetic sleeves 13, 14.
- curve B in the course of the flux density over the path of the permanent magnet 12 is shown when the permanent magnet 12 also made of a hard ferrite material consists and is covered on both sides by the ferromagnetic sleeves 13, 14. It follows that the flux density B of the permanent magnet 12 with the ferromagnetic sleeves 13, 14 has a much steeper edge, which can be well recognized by the designed as a Hall sensor switching point sensor 1 1.
- the slight increase in the maximum magnet of the permanent magnet 12 with the ferromagnetic sleeves 13, 14 results from the fact that a portion of the magnetic field, which would normally pass through an axial bore of the permanent magnet formed as a hollow cylinder 12, by the use of the ferromagnetic sleeves 13 and 14 after is directed outside. This happens because the ferromagnetic material, which serves as a flux guide, better conducts the magnetic field and the path on the outside of the permanent magnet 12 is thus preferred.
- a curve C is taken, which corresponds to a short permanent magnet without ferromagnetic sleeves 13, 14 and has a length which corresponds to the gap 15 between the ferromagnetic sleeves 13, 14 of a longer permanent magnet 12.
- the comparison of the curves B and C makes it clear that its pitch in the center of the measuring path corresponds exactly to that of the permanent magnet 12 with the ferromagnetic sleeves 13, 14.
- the existing of the hard ferrite permanent magnet 12, which is axially magnetized may be formed as a solid cylinder or as a hollow cylinder, as shown in Fig. 5 and Fig. 6. In Fig.
- the permanent magnet 12 are formed as a hollow cylinder and are covered on both sides of the respective ferromagnetic sleeve 13, 14. Due to the use of the hollow cylinder, which has an axial bore 16 for better attachment to the piston 3, and the ferromagnetic sleeves 13, 14 must have such an opening.
- the diameter of the permanent magnet 12 with the diameter of the opening of the ferromagnetic sleeve 13, 14 coincide or the diameter of the opening of the ferromagnetic sleeve 13, 14 may be larger than the diameter of the bore as shown in FIG. 5B 16 of the permanent magnet 12th
- the permanent magnet 12 is formed as a solid cylinder.
- the ferromagnetic sleeves 13, 14 may have an opening according to FIG. 6A. However, they can also, as shown in Fig. 6B, completely cover the ends of the permanent magnet 12. Due to the partial overlap of extending in the direction of movement of the permanent magnet 12 outside of the permanent magnet 12 through the ferromagnetic sleeves 13, 14, a field profile of a structurally shorter magnet is generated.
- the permanent magnet 12 is formed as a cuboid and covered on both sides by the sleeves 13, 14, which have no opening.
- the permanent magnet 12 can also have the shape of a hollow cylinder segment (FIG. 8), which is why the end sides of the ferromagnetic sleeves 13, 14 are also adapted to this shape, but nevertheless partially overlap the permanent magnets 12 in the axial direction with their legs.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
- Actuator (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2017502685A JP6629289B2 (ja) | 2014-07-16 | 2015-06-19 | センサシステム及びピストンシリンダ装置 |
CN201580038478.6A CN106662466B (zh) | 2014-07-16 | 2015-06-19 | 传感器系统和活塞缸装置 |
DE112015003289.4T DE112015003289A5 (de) | 2014-07-16 | 2015-06-19 | Sensorsystem und Kolben-Zylinder-Anordnung |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014213829.9A DE102014213829A1 (de) | 2014-07-16 | 2014-07-16 | Sensorsystem und Kolben-Zylinder-Anordnung |
DE102014213829.9 | 2014-07-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2016008481A1 true WO2016008481A1 (de) | 2016-01-21 |
Family
ID=53757941
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2015/200380 WO2016008481A1 (de) | 2014-07-16 | 2015-06-19 | Sensorsystem und kolben-zylinder-anordnung |
Country Status (4)
Country | Link |
---|---|
JP (1) | JP6629289B2 (de) |
CN (1) | CN106662466B (de) |
DE (2) | DE102014213829A1 (de) |
WO (1) | WO2016008481A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3066817B1 (fr) * | 2017-05-29 | 2019-08-16 | MCE 5 Development | Dispositif de mesure pour moteur a combustion interne comprenant un detecteur de passage d'une cible et moteur comportant un tel dispositif de mesure |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5115194A (en) * | 1990-09-27 | 1992-05-19 | Kearney-National Inc. | Hall effect position sensor with flux limiter and magnetic dispersion means |
EP0800055A1 (de) * | 1996-04-03 | 1997-10-08 | Sagem Sa | Linear- und Winkelpositionssensor |
EP1696213A2 (de) * | 2005-02-28 | 2006-08-30 | Delphi Technologies, Inc. | Kompakter linearer Einzelmagnetpositionssensor |
DE102008042912A1 (de) * | 2008-10-16 | 2010-04-22 | Robert Bosch Gmbh | Sensoreinrichtung zum Erfassen der Drehlage eines rotierenden Bauteils |
DE102012218605A1 (de) | 2011-10-24 | 2013-04-25 | Schaeffler Technologies AG & Co. KG | Induktiver Schaltpunktsensor, insbesondere für eine Kolben-Zylinder-Anordnung einer Kupplungsbetätigungsvorrichtung |
DE102012219183A1 (de) | 2012-10-22 | 2014-04-24 | Sedus Stoll Ag | Höhenverstellbarer Raumteiler |
DE102012219173A1 (de) * | 2012-10-22 | 2014-04-24 | Schaeffler Technologies Gmbh & Co. Kg | Sensorsystem und Kolben-Zylinder-Anordnung, insbesondere zur Verwendung in einem Kupplungsbetätigungssystem in einem Kraftfahrzeug |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS586401A (ja) * | 1981-07-03 | 1983-01-14 | Tokico Ltd | 位置検出器 |
DE10202309A1 (de) * | 2002-01-23 | 2003-07-31 | Bosch Gmbh Robert | Wegsensor mit magnetoelektrischem Wandlerelement |
JP2004332635A (ja) * | 2003-05-08 | 2004-11-25 | Aisan Ind Co Ltd | スロットル制御装置 |
JP5195125B2 (ja) * | 2008-07-30 | 2013-05-08 | 日産自動車株式会社 | 車両用駆動装置 |
JP5079846B2 (ja) * | 2010-06-03 | 2012-11-21 | 東京コスモス電機株式会社 | 位置検出装置 |
-
2014
- 2014-07-16 DE DE102014213829.9A patent/DE102014213829A1/de not_active Withdrawn
-
2015
- 2015-06-19 JP JP2017502685A patent/JP6629289B2/ja active Active
- 2015-06-19 DE DE112015003289.4T patent/DE112015003289A5/de active Pending
- 2015-06-19 WO PCT/DE2015/200380 patent/WO2016008481A1/de active Application Filing
- 2015-06-19 CN CN201580038478.6A patent/CN106662466B/zh active Active
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5115194A (en) * | 1990-09-27 | 1992-05-19 | Kearney-National Inc. | Hall effect position sensor with flux limiter and magnetic dispersion means |
EP0800055A1 (de) * | 1996-04-03 | 1997-10-08 | Sagem Sa | Linear- und Winkelpositionssensor |
EP1696213A2 (de) * | 2005-02-28 | 2006-08-30 | Delphi Technologies, Inc. | Kompakter linearer Einzelmagnetpositionssensor |
DE102008042912A1 (de) * | 2008-10-16 | 2010-04-22 | Robert Bosch Gmbh | Sensoreinrichtung zum Erfassen der Drehlage eines rotierenden Bauteils |
DE102012218605A1 (de) | 2011-10-24 | 2013-04-25 | Schaeffler Technologies AG & Co. KG | Induktiver Schaltpunktsensor, insbesondere für eine Kolben-Zylinder-Anordnung einer Kupplungsbetätigungsvorrichtung |
DE102012219183A1 (de) | 2012-10-22 | 2014-04-24 | Sedus Stoll Ag | Höhenverstellbarer Raumteiler |
DE102012219173A1 (de) * | 2012-10-22 | 2014-04-24 | Schaeffler Technologies Gmbh & Co. Kg | Sensorsystem und Kolben-Zylinder-Anordnung, insbesondere zur Verwendung in einem Kupplungsbetätigungssystem in einem Kraftfahrzeug |
Also Published As
Publication number | Publication date |
---|---|
CN106662466B (zh) | 2020-06-12 |
JP6629289B2 (ja) | 2020-01-15 |
DE102014213829A1 (de) | 2016-01-21 |
JP2017523409A (ja) | 2017-08-17 |
DE112015003289A5 (de) | 2017-04-13 |
CN106662466A (zh) | 2017-05-10 |
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