EP3365571A1 - Joint à rotule pour un véhicule muni d'un dispositif de mesure de l'angle d'inclinaison - Google Patents

Joint à rotule pour un véhicule muni d'un dispositif de mesure de l'angle d'inclinaison

Info

Publication number
EP3365571A1
EP3365571A1 EP16775642.8A EP16775642A EP3365571A1 EP 3365571 A1 EP3365571 A1 EP 3365571A1 EP 16775642 A EP16775642 A EP 16775642A EP 3365571 A1 EP3365571 A1 EP 3365571A1
Authority
EP
European Patent Office
Prior art keywords
ball
housing
distance
ball joint
sensor
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Withdrawn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
EP16775642.8A
Other languages
German (de)
English (en)
Inventor
Michael Klank
Klaus HASKAMP
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.)
ZF Friedrichshafen AG
Original Assignee
ZF Friedrichshafen AG
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 ZF Friedrichshafen AG filed Critical ZF Friedrichshafen AG
Publication of EP3365571A1 publication Critical patent/EP3365571A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C11/00Pivots; Pivotal connections
    • F16C11/04Pivotal connections
    • F16C11/06Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints
    • F16C11/0604Construction of the male part
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C11/00Pivots; Pivotal connections
    • F16C11/04Pivotal connections
    • F16C11/06Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints
    • F16C11/0619Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints the female part comprising a blind socket receiving the male part
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C41/00Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
    • F16C41/007Encoders, e.g. parts with a plurality of alternating magnetic poles

Definitions

  • the invention relates to a ball joint for a vehicle, comprising a housing and a ball pin extending in an axial direction and comprising a joint ball, which is pivotally mounted with its ball joint in the housing and extending through an opening of the housing, and at least one sensor which serves to detect a tilt angle between the ball stud and the housing.
  • Ball joints of this type are known from the prior art.
  • the German patent application DE10350640B4 describes a ball joint for a motor vehicle, with a housing having a recess, a ball pin having a pin and a ball joint, which is rotatably and pivotally mounted in the recess of the housing with its ball joint.
  • the pin extends through an opening provided in the housing and a sealing bellows is provided, which is arranged between the housing and the pin.
  • a multi-part measuring arrangement is disclosed which has at least one signal generator and at least one sensor, wherein the measuring arrangement is arranged between the housing, in the region of the journal-side end of the joint ball and the journal-side end of the sealing bellows.
  • German patent application DE102010052885A1 discloses a load carrier or bicycle carrier for a motor vehicle, the load carrier having a fastening device with clamping components, wherein the clamping components in a housing for receiving by the action of a holding drive, a ball head of a trailer hitch clamp the ball head, wherein the housing is pivotable relative to the ball head.
  • the housing further has two sensors which determine the distance to the ball head. If the two sensors determine the same distance to the ball head, the holding drive is turned on to ensure a certain alignment of the housing or load carrier with respect to the ball head.
  • the sensors are arranged on the upper wall of the housing and measure a distance to a flattening of the ball head.
  • German Patent Application DE 102010030246 A1 discloses a ball joint for a vehicle which has a housing and a ball stud. An angle measuring device with field-providing component is described, by means of which a movement of the ball pin relative to the housing can be detected, wherein the field-providing components are arranged opposite to a joint ball of the ball stud.
  • the joint ball has a surface area that deviates from the spherical surface of the joint ball. This surface area interacts with the magnetic field of the field-providing components.
  • a ball and socket joint for a vehicle comprising a housing and a ball pin extending in an axial direction and comprising a joint ball, which is pivotally mounted with its ball joint in the housing and extends through an opening of the housing, and at least one sensor operable to detect a tilt angle between the ball stud and the housing, the wrist ball having a flattened area, and wherein the at least one sensor is a distance sensor disposed on a wall of the housing and the flattened area of the housing Opposite ball is opposite to detect a distance from the flattened area and to close from it to the tilt angle.
  • the Sensor can be mounted on the surface on the inner side of the housing by means of customary fastening methods, for example by means of gluing and / or screws.
  • the at least one sensor can also be used in the housing wall.
  • an opening, a blind hole or a through hole can be provided for this purpose.
  • the wall of the housing is prefabricated and that the sensor is integrated as part of the prefabricated wall.
  • the term flattened region is to be understood as meaning a surface section of the joint ball which quite generally has a curvature reduced in relation to the ball curvature (in the sense of a flattening).
  • the curvature of the flattened area may in a preferred case be zero, so that it forms a straight plane.
  • the flattened region of the ball joint unlike the processed surfaces, can be easily manufactured as described in the prior art.
  • the use of a distance sensor further allows insensitivity to magnetic noise.
  • the flattened region extends substantially orthogonal to the axial direction of the ball stud.
  • the distance sensor always detects the distance between the sensor and this flattened area. As the ball stud moves in the housing, this flattened area will tilt. If the tilt angle between the ball stud and the housing changes, the distance between the sensor and the flattened area also changes accordingly. If the relationship between distance and tilt angle is known, the ball joint can close by means of this relationship on the basis of the distance on the tilt angle.
  • the flattened region forms a straight plane.
  • the relationship between the distance and the tilt angle can thus be described by a simple mathematical formula. It is still possible to create a simple algo- to determine the tilt angle based on this distance. The error range of the tilt angle detection can thus be reduced.
  • the flattened area essentially forms a circular area.
  • the production of the ball joint is thus simplified.
  • the surface of the joint ball is processed using complex production methods.
  • a blind hole is drilled in the joint ball in order to store magnetic field generators.
  • the circular surface area of the ball joint thus brings significant advantages in terms of manufacturing costs.
  • the at least one sensor is a sensor that is used on the basis of an inductive, capacitive and / or optical measuring method to detect the distance.
  • a ball joint for a vehicle may be regularly in an area of influence of an external magnetic field.
  • a sensor that works on the basis of an inductive, capacitive and / or optical measuring method has the advantage that it is not affected by these magnetic fields. A ball joint of this kind is therefore very robust against magnetic interference.
  • the at least one sensor is arranged symmetrically with respect to a predetermined pivot axis of the ball joint on the wall of the housing, so that the sensor when the tilt angle between the housing and the ball stud is zero degrees, the distance from a parallel to the predetermined Pivot axis defined diameter of the flattened area detected.
  • the sensor is mounted in the middle of the pivot axis on the housing wall. The sensor thus measures the distance to the center of the flattened area when the tilt angle is at zero degrees. As the ball stud tilts in a pivoting direction, the flattened area tilts relative to the sensor. The distance between the sensor and the flattened area is thus reduced. From the detected distance thus the tilt angle can be determined clearly.
  • the pivot direction can not be determined or the ball joint can not between a positive tilt angle and a negative tilting Distinguish angles.
  • the ball stud can move in relation to the housing in a predetermined range of motion.
  • the ball stud may sway 40 degrees relative to the housing.
  • a tilt angle which is zero degrees, denotes the state in which the ball stud is in the middle of its range of motion.
  • the ball stud for example, between + 20 degrees and - 20 degrees fluctuate.
  • At least one sensor is arranged on the wall of the housing, that the sensor, when the tilt angle between the housing and the ball stud is zero degrees, the center of the flattened area opposite and thus detects the distance from the center.
  • the sensor or the ball joint can thus detect an absolute amount, the distance or the tilt angle regardless of the pivoting direction. In this case, the sensor is always located opposite to a diameter of the flattened area.
  • the ball joint has an evaluation unit which serves to determine the tilt angle on the basis of a distance value, the distance value corresponding to the detected distance.
  • the at least one sensor is arranged asymmetrically with respect to a predetermined pivot axis of the ball joint on the wall of the housing, so that the sensor when the tilt angle between the housing and the ball stud is zero degrees, the distance to a parallel to detected chord of the flattened area detected the predetermined pivot axis, wherein the chord does not correspond to a diameter of the flattened area.
  • the sensor is positioned off-center.
  • a first sensor and a second sensor are arranged asymmetrically with respect to a predetermined pivot axis of the ball joint on the wall of the housing, wherein, when the tilt angle between the housing and the ball stud is zero degrees, the first sensor detects the distance from a first chord of the flattened area, and the second sensor detects the distance from a second chord of the flattened area, the first chord and second chord being parallel to each other and parallel to a diameter of the flattened area And the second chord extends in a second portion of the flattened portion, the first portion and second portion being separated by the diameter of the flattened portion.
  • the sensors By using two sensors, one to the right and one to the left of the center, one can determine a unique and linear relationship between tilt angle and distance. The entire range of motion of the ball stud can thus be covered by the sensors, so that a clear assignment of the tilt angle for removal is possible. Further, when the sensors are placed at the same distance from the diameter, the characteristics representing the relationship between the distance and the tilt angle can be subtracted from each other. The result is a characteristic that represents a linear relationship between distance and tilt angle.
  • the ball joint has an evaluation unit which serves to determine the tilt angle on the basis of a first distance value and a second distance value, wherein the distance values correspond to the detected first distance and second distance, and wherein the evaluation unit is adapted to the first Subtract the distance value from the second distance value.
  • At least two sensors are arranged on the wall of the housing, wherein the at least two sensors are used to detect the tilt angle between the ball stud and the housing relative to two mutually different pivot directions.
  • the object of the invention can furthermore be achieved by a device comprising an evaluation unit and a ball joint, the device having a communication path which connects the evaluation unit and the ball joint. det, and wherein the evaluation unit serves to determine the tilt angle on the basis of one of the detected distance corresponding distance value.
  • the object can also be achieved by a device comprising an evaluation unit and a ball joint, wherein the device has a communication path which connects the evaluation unit and the ball joint, and wherein the evaluation unit serves to increase the tilt angle based on a first distance value and a second distance value determine, wherein the distance values of the detected first distance and second distance correspond, and wherein the evaluation unit is adapted to subtract the first distance value from the second distance value.
  • Fig. 1a, b is a schematic representation of a first embodiment of a ball joint, and a graphical representation of the relationship between distance and tilt angle of the embodiment shown in Figure 1a;
  • Fig. 2a, b is a schematic representation of a second embodiment of a
  • Ball joint as well as a graphical representation of the relationship between distance and tilt angle of the embodiment shown in Figure 2a;
  • Fig. 3a, b is a schematic representation of a third embodiment of a ball joint, and a graphical representation of the relationship between distance and tilt angle of the embodiment shown in Fig. 3a.
  • Fig. 1a shows a ball joint 1 with a housing 2 and a ball stud 3.
  • the ball stud 3 has a joint ball 4, wherein the joint ball 4 has a flattened region 5. Opposite of this flattened region 5, a sensor 6 is arranged on the housing wall 7. The sensor 6 is a distance sensor.
  • the ball stud 3 further extends in an axial direction A. an opening 8 out of the housing 2.
  • the ball joint 1 is shown in three different positions L, M, N. In the first position L, there is a negative tilt angle -a between the ball stud 3 and the housing 2.
  • the tilt angle ⁇ between ball stud 3 and the housing 2 is at 0 degrees and in the third position N there is a positive tilt Tilt angle + ⁇ between the ball stud 3 and the housing 2.
  • the axial direction A of the ball stud 3 is designated in each case with a straight line A.
  • Fig. 1b shows in graphic form the relationship between the distance d and the tilt angle.
  • the tilt angle ⁇ is 0 degrees
  • the distance d between the sensor 6 and the flattened area 5 is of course greatest.
  • the ball pivot 3 pivots to one side or to the other, the distance d between the flattened region 5 and the sensor 6 decreases.
  • the ball joint 1 can not perform a unique assignment, but the ball joint 1 can only an absolute amount of the tilt angle
  • FIG. 2a shows a schematic representation of a second embodiment of a ball joint 1.
  • the sensor 6 is arranged asymmetrically on the housing wall 7. This asymmetry refers to a diameter 11 of the flattened region 5, which can be defined on the basis of the pivot axis 10.
  • the diameter 11, which is parallel to the pivot axis 10, is taken as a reference line to divide the flattened area 5 into two halves.
  • the sensor 6 which is arranged asymmetrically on the housing wall 7, detects the distance d from a chord 12 of the flattened region 5 when the tilt angle ⁇ between the ball stud 3 and the housing 2 is zero degrees.
  • the Sen- Sor 6 thus detects the distance d between the housing wall 7 and a point in a predetermined half of the flattened area 5.
  • Fig. 2b shows a graphical representation of the functional relationship between distance d and tilt angle ⁇ of the embodiment shown in Fig. 2a. It can be seen here that a definite assignment between distance d and tilt angle ⁇ is possible over a predetermined range of movement 13 of the ball stud 3. However, there is another range of motion 14 where this uniqueness is absent. Furthermore, the functional relationship is not linear.
  • FIG. 3a shows a schematic representation of a third embodiment of a ball joint 1.
  • the ball joint 1 with a housing 2, ball stud 3, ball joint 4 and a sensor 6 is shown.
  • the joint ball 4 has a flattened region 5, and at least one sensor 6, which is arranged on a wall 7 of the housing 2 opposite this flattened region 5.
  • two sensors 6a, 6b are shown. These two sensors 6a, 6b are arranged asymmetrically as in FIG. 2a.
  • This asymmetry refers to the longitudinal axis A of the ball stud 3 when the ball stud 3 is at 0 degrees with respect to the housing 2.
  • this asymmetry may also relate to a diameter 11 of the flattened region 5, wherein the diameter 11 extends parallel to the pivot axis 10 of the ball joint 1.
  • Fig. 3b there is a functional relationship between distance d and tilt angle ⁇ for each sensor 6a, 6b. From this functional relationship, a definite allocation between distance d and tilt angle ⁇ is possible via a predetermined freedom of movement (between - ⁇ and + a) of ball stud 3. With the use of two sensors 6a, 6b, as shown in Fig. 3, it is possible to cover the entire range of motion (-a to + a) of the ball joint 3 with unique functional relationships. It is also possible, as shown in Fig. 3b, to derive a linear, functional relationship from the individual functional relationships of the two sensors 6a, 6b.
  • this can be done by, for example, subtracting the distance d a from a first sensor 6a from the distance d b of a second sensor 6b. This results in a linear, radio- tional relationship between the distance measurements d a , d b and the tilt angle a.
  • the distance sensors 6a, 6b can use different measuring principles. In particular, inductive measuring methods, capacitive measuring methods and / or optical measuring methods can be used.
  • the sensors 6a, 6b detect the distance d and transmit a measured value to an evaluation unit 15.
  • the evaluation unit 15 accepts this distance value or measured value as input, processes the measured value in accordance with the specifications of an algorithm and outputs a value which interpolates the tilt angle ⁇ Ball stud 3 and housing 2 corresponds.
  • the evaluation unit 15 can either be arranged on the ball joint 1 itself, as shown in the first position L in FIG. 3 a, or a communication path 16 to an external evaluation unit 15 can be provided.
  • a connection 17 can be provided to a CAN bus and the evaluation unit 15 can be arranged on a main control 18 of the vehicle (see the third position N in FIG. 3a).

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pivots And Pivotal Connections (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)

Abstract

L'invention concerne un joint à rotule (1) pour un véhicule, muni d'un carter (2) et d'un tourillon sphérique (3) qui s'étend dans une direction axiale (A), comprend une rotule (4), est monté mobile en pivotement par sa rotule (4) dans le carter (2) et traverse une ouverture (8) du carter (2), et muni d'au moins un capteur (6) qui sert à détecter un angle d'inclinaison (α) entre le tourillon sphérique (3) et le carter (2). La rotule (4) présente une zone aplatie (5), le ou les capteurs (6) étant des capteurs de distance qui sont agencés sur une paroi (7) du carter (2) et à l'opposé de la partie aplatie (5) de la rotule (4), pour détecter une distance (d) par rapport à la partie aplatie (5) et en déduire l'angle d'inclinaison (α).
EP16775642.8A 2015-10-23 2016-09-28 Joint à rotule pour un véhicule muni d'un dispositif de mesure de l'angle d'inclinaison Withdrawn EP3365571A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015220757.9A DE102015220757A1 (de) 2015-10-23 2015-10-23 Kugelgelenk für ein Fahrzeug
PCT/EP2016/073106 WO2017067766A1 (fr) 2015-10-23 2016-09-28 Joint à rotule pour un véhicule muni d'un dispositif de mesure de l'angle d'inclinaison

Publications (1)

Publication Number Publication Date
EP3365571A1 true EP3365571A1 (fr) 2018-08-29

Family

ID=57068083

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16775642.8A Withdrawn EP3365571A1 (fr) 2015-10-23 2016-09-28 Joint à rotule pour un véhicule muni d'un dispositif de mesure de l'angle d'inclinaison

Country Status (7)

Country Link
US (1) US20180231051A1 (fr)
EP (1) EP3365571A1 (fr)
JP (1) JP2019501337A (fr)
KR (1) KR20180074722A (fr)
CN (1) CN108138836A (fr)
DE (1) DE102015220757A1 (fr)
WO (1) WO2017067766A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017219584A1 (de) * 2017-11-03 2019-05-09 Zf Friedrichshafen Ag Magnetfeldsensor und Verfahren zur Montage eines Magneten
JP7023095B2 (ja) * 2017-12-12 2022-02-21 サカエ理研工業株式会社 車両用表示装置
CN109211152B (zh) * 2018-08-02 2020-04-28 杭州电子科技大学 同时检测精密球铰链球头偏心量与球杆空间姿态的方法
DE102018217643A1 (de) 2018-10-15 2020-04-16 Zf Friedrichshafen Ag Gelenk, Lenker für eine Radaufhängung sowie Verfahren zur Montage eines Gelenks
CN111207717B (zh) * 2020-03-19 2021-08-17 国网河南省电力公司电力科学研究院 用于测量三维倾角的设备
CN111623737B (zh) * 2020-07-31 2020-11-06 广东电网有限责任公司惠州供电局 一种杆塔位移监测装置
CN112595371B (zh) * 2021-03-02 2021-08-17 成都工百利自动化设备有限公司 一种用于手车式高压断路器触头工作状态的传感系统

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10110738C5 (de) 2001-03-01 2008-06-05 ZF Lemförder GmbH Kugelgelenk, Vorrichtung zum Steuern von Betriebsparametern eines Kraftfahrzeuges, Lenkgestänge, Spurstange sowie Verfahren zur Herstellung eines Kugelgelenks
DE10134259A1 (de) * 2001-07-18 2003-02-06 Zf Lemfoerder Metallwaren Ag Kugelgelenk mit integriertem Winkelsensor
DE10161671A1 (de) * 2001-12-14 2003-06-26 Zf Lemfoerder Metallwaren Ag Kugelgelenk für ein Kraftfahrzeug
DE10339126B4 (de) * 2003-08-22 2009-04-02 Zf Friedrichshafen Ag Kugelgelenk mit Winkelsensor
DE10350640B4 (de) 2003-10-29 2005-11-17 Zf Friedrichshafen Ag Kugelgelenk für ein Kraftfahrzeug
DE102004039781B4 (de) * 2004-08-16 2007-03-29 Zf Friedrichshafen Ag Kugelgelenk für ein Kraftfahrzeug
DE102005027826B3 (de) * 2005-06-15 2007-01-18 Zf Friedrichshafen Ag Kugelgelenk mit Sensoreinrichtung und Verfahren zur Verschleißmessung
DE102005034150B4 (de) * 2005-07-19 2008-04-17 Zf Friedrichshafen Ag Kugelgelenk für ein Kraftfahrzeug
DE102008041050A1 (de) * 2008-08-06 2010-02-11 Zf Friedrichshafen Ag Verfahren zur Messung des Verschleißes eines Kugelgelenks
DE102010030246A1 (de) 2010-06-17 2011-12-22 Zf Friedrichshafen Ag Kugelgelenk für ein Fahrzeug
DE102010052885B4 (de) 2010-12-01 2023-02-09 Westfalia-Automotive Gmbh Lastenträger mit einer angetriebenen Befestigungseinrichtung
CN103527620B (zh) * 2013-10-23 2015-09-16 合肥工业大学 可实现回转角度测量的球铰链及测量方法

Also Published As

Publication number Publication date
KR20180074722A (ko) 2018-07-03
WO2017067766A1 (fr) 2017-04-27
US20180231051A1 (en) 2018-08-16
DE102015220757A1 (de) 2017-04-27
JP2019501337A (ja) 2019-01-17
CN108138836A (zh) 2018-06-08

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