EP2655913A2 - Verfahren zur ansteuerung eines betätigungsmittels - Google Patents

Verfahren zur ansteuerung eines betätigungsmittels

Info

Publication number
EP2655913A2
EP2655913A2 EP11779417.2A EP11779417A EP2655913A2 EP 2655913 A2 EP2655913 A2 EP 2655913A2 EP 11779417 A EP11779417 A EP 11779417A EP 2655913 A2 EP2655913 A2 EP 2655913A2
Authority
EP
European Patent Office
Prior art keywords
movement
piston
pressure
friction force
sliding friction
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Withdrawn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
EP11779417.2A
Other languages
German (de)
English (en)
French (fr)
Inventor
Rupert Kramer
Peter Herter
Franz Bitzer
Roland Mair
Florian Schneider
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 EP2655913A2 publication Critical patent/EP2655913A2/de
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • F16D48/02—Control by fluid pressure
    • 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
    • F16D48/02—Control by fluid pressure
    • F16D2048/0227—Source of pressure producing the clutch engagement or disengagement action within a circuit; Means for initiating command action in power assisted devices
    • F16D2048/0233—Source of pressure producing the clutch engagement or disengagement action within a circuit; Means for initiating command action in power assisted devices by rotary pump actuation
    • 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
    • F16D48/02—Control by fluid pressure
    • F16D2048/0257—Hydraulic circuit layouts, i.e. details of hydraulic circuit elements or the arrangement thereof
    • F16D2048/0278—Two valves in series arrangement for controlling supply to actuation cylinder
    • 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
    • F16D2500/104—Clutch
    • F16D2500/10406—Clutch position
    • F16D2500/10412—Transmission line of a vehicle
    • 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
    • F16D2500/3023—Force
    • 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
    • F16D2500/3024—Pressure
    • 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
    • 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
    • F16D2500/70—Details about the implementation of the control system
    • F16D2500/702—Look-up tables
    • F16D2500/70205—Clutch actuator
    • F16D2500/70211—Force
    • 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
    • F16D2500/70—Details about the implementation of the control system
    • F16D2500/702—Look-up tables
    • F16D2500/70205—Clutch actuator
    • F16D2500/70235—Displacement
    • 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
    • F16D2500/70—Details about the implementation of the control system
    • F16D2500/706—Strategy of control
    • F16D2500/70605—Adaptive correction; Modifying control system parameters, e.g. gains, constants, look-up tables

Definitions

  • the invention relates to a method for controlling a pneumatic actuating means according to the preamble of claim 1.
  • the pneumatic actuating means comprises a piston which is arranged axially displaceably in a pneumatic cylinder, wherein the piston depends on a
  • Pneumatic pressure is displaced in a pressure chamber of the pneumatic cylinder.
  • the pressure in the pressure chamber of the pneumatic cylinder is adjustable via a switching valve, which is controlled by a control device.
  • the switching valve assumes a first position, wherein in this first position the pressure chamber via the switching valve compressed air can be supplied to increase the pressure in the pressure chamber of the cylinder.
  • a second position of the switching valve can be derived from the pressure chamber in the direction of a pressure medium sink to reduce the pressure in the pressure chamber.
  • the pneumatic actuating means is controlled such that an intended direction of movement of the piston is preceded by a direction of movement opposite to the intended direction of movement.
  • an external force acting on the actuating means becomes larger, as a result of which possible stick-slip effects can be overcome.
  • the present invention seeks to provide a method for controlling an actuating means, with which dead times can be reduced.
  • a pilot control component for the control is dependent on at least one sliding friction force and / or at least one static friction force of the pneumatic actuating means.
  • a pilot component for the actuation of the pneumatic actuating means as a function of at least one sliding friction force and / or at least one static friction force.
  • the pilot component which dead times can be reduced or even completely eliminated.
  • this pilot component is chosen so that it is suitable, straight or exclusive or accurate to overcome the difference or the difference between the sliding friction force acting in the defined direction of movement and the static friction force acting in the defined direction of movement or corresponds to this difference or the difference.
  • the pilot component is chosen so that it is suitable, straight or exclusive or to precisely overcome the difference or the difference between the sliding friction force acting in the defined direction of movement and the static friction force acting in the defined direction of movement and the difference or the difference between the sliding friction force acting in the defined direction of movement and acting counter to the defined direction of movement or these differences or corresponds to these differences.
  • the pilot component for the control tion is chosen so that the same half difference or half the difference between in opposite corresponds to set movement directions acting friction forces.
  • Fig. 1 is a schematic representation of a pneumatic actuating means
  • Fig. 2 is a diagram for illustrating the method according to the invention.
  • the invention relates to a method for controlling a pneumatic actuating means, which serves the actuation of a pneumatically actuated device, such as a starting clutch of a motor vehicle or a switching element of an automated manual transmission.
  • Fig. 1 shows an exemplary embodiment of a pneumatic actuating means 1, which is formed as shown in FIG. 1 as a piston-cylinder arrangement.
  • the actuating means 1 is controlled via a pressure regulating device 2.
  • the actuating means 1 comprises a piston 3, which is arranged axially displaceably in a pneumatic cylinder 4, wherein a piston rod 5 is coupled to the piston 3. Between the piston 3 and the pneumatic cylinder 4, a sealant 6 may be positioned. If the actuating means 1 is actuated, an external force F acts on the piston rod 5 in the exemplary embodiment of FIG. As already stated, the pneumatic actuating means 1 is actuated by the pressure regulating device 2, wherein a pressure in a pressure chamber 7 of the actuating means 1 can be adjusted by the pressure regulating device 2. If the piston 3 is to be moved to the right in FIG. 1, the pressure in the pressure chamber 7 must be increased. If, on the other hand, the piston 3 in FIG. 1 is to be moved to the left, the pressure in the pressure chamber 7 must be reduced. The movement of the piston 3 can be registered, for example, via a displacement measuring system 8, for example via a displacement sensor arranged internally or externally on the actuating means 1.
  • the pressure control device 2 comprises a pressure generating device 9, for example a pump, which brings the compressed air of the pneumatic actuating means to a so-called main pressure.
  • This main pressure is applied to a main pressure line 15, which is connected to a pressure medium accumulator 10.
  • a pressure medium accumulator 10 In the pressure medium accumulator 10, a comparatively large volume of the compressed air supplied by the pressure generating device 9 to the main pressure is temporarily stored since the pressure generating device 9 typically operates discontinuously.
  • a pressure regulating means 1 1 is arranged, for example, a 2/2-way valve or a proportional valve.
  • the pressure regulating means 1 1 is a connection between the main pressure line 15 and a control pressure line 16, which extends between the pressure regulating means 1 1 and a switching valve 12, made as needed.
  • switching valve 12 may be, for example, a 3/2-way valve.
  • a connection between the control pressure line 16 and a pressure medium line is set or interrupted, wherein the pressure medium line 17 extends between the switching valve 12 and the pressure chamber 7 of the pneumatic actuating means 1.
  • a return line 18 which extends between the switching valve 12 and a compressed air sink 14.
  • the compressed air sink 14 is the environment.
  • the pressure generating device 9, the pressure regulating means 1 1 and the switching valve 12 are driven by a control device 13, wherein the same via signal line 19, 20 and 21 are coupled to the control device. Via the control device 13, control signals are applied to the pressure regulating means 1 1, the switching valve 12 and the pressure generating device 9 to adjust the pressure prevailing in the pressure chamber 7 and thus displace the piston 3 of the pneumatic actuating means 1 for actuating a pneumatically actuated device.
  • the invention is based on the finding that in the control of the actuating means 1, in particular when displacing the piston 3, friction must be overcome before the piston 3 actually sets in motion.
  • the pilot component which is generated according to the invention depending on at least one sliding frictional force and / or at least one static frictional force of the pneumatic actuating means 1 of the controller 13, takes into account the friction to be overcome and thus reduces dead times in the control of the pneumatic actuating means 1 and in the operation of a the pneumatic actuator pneumatically actuated device.
  • the actuating means 1 namely in the embodiment of FIG.
  • the force F is plotted on the position x, which is formed upon actuation of a pneumatically actuated clutch on the piston 3, wherein in the Position x1 of the piston 3, the starting clutch to be actuated is fully closed, wherein in the position x2 of the piston 3, the starting clutch to be actuated is fully open, and wherein the starting clutch to be actuated in the position x3 of the piston 3 is in the so-called Anlegetician, in which the clutch just does not transmit a moment, so still separates.
  • the piston 3 and therefore the pneumatic actuating means 1 are at a standstill, it comes to a standstill depending on the previous direction of movement on one of the sliding friction force curves 22 and 23, respectively. If it is therefore a movement of the piston from left to right in a previous direction of movement, then the piston 3 comes to rest on the sliding friction curve 22, whereas in a reverse, previous direction of movement from the right to the left, the piston 3 arrives on the sliding friction curve 23 standstill.
  • the pilot component is selected by the control device 13 so that it is suitable, just or exclusively or precisely the difference between the sliding friction force acting in the defined direction of movement and in the defined direction of movement to overcome acting static friction.
  • this is shown by way of example for a piston 3 which is at a standstill in position x4 and whose previous direction of movement corresponds to a movement from left to right, which therefore comes to a standstill in position x4 on the sliding friction force curve 22 at a standstill.
  • the pilot component corresponds to the difference or the difference ⁇ 4 between the sliding frictional force acting in the defined direction of movement in the position x4 and that in the defined direction of movement in the Position x4 acting static friction.
  • the pilot component is selected by the control device 1 3 so that it is suitable, straight or exclusive or precisely to overcome the difference between the sliding friction force acting in the defined direction of movement and the static friction force acting in the defined direction of movement and the difference between the sliding friction force acting in the defined direction of movement and acting opposite to the defined direction of movement.
  • FIG. 2 this is shown by way of example for a piston located in the position x5 at a standstill, whose previous direction of movement of left to right, which thus came to rest in position x5 on the Gleitreibungskraftkurve 22, which, however, subsequently to be moved by reversing its previous direction of movement from a standstill from right to left.
  • the precontrol component then corresponds to the sum of the difference A5a between the sliding frictional force acting in the defined direction of movement in the position x5 and the static frictional force acting in the defined direction of movement in the position x5 and the difference or difference A5b between the sliding frictional force acting in the defined direction of movement in the position x5 and the sliding frictional force acting opposite to the defined direction of movement in the position x5.
  • control means 13 selects a pilot component corresponding to half the difference or half the difference between the static friction forces acting in the opposite directions of movement.
  • FIG. 2 this is shown by way of example for a piston 3 which assumes the position x6 at a standstill and whose previous direction of movement corresponds to a direction of movement from right to left, so that the same therefore comes to a standstill on the sliding friction force curve 23. If the next movement direction of the piston 3 is not known in this case, then the pilot component corresponds to half of the difference or half of the difference ⁇ 6 between the static friction forces acting in the different or opposite directions of movement in the position x6.
  • the knowledge of the position-dependent sliding friction forces 22, 23 acting in the different directions of movement and static friction forces 24, 25 are required.
  • the sliding friction forces 22, 23 and the static friction forces 24, 25 adaptively during operation.
  • the invention can be provided to adjust adaptively in operation, either the sliding friction forces 22, 23 or only the static friction forces 24, 25, and depending on the non-adaptively adapted static friction or sliding friction depending on a defined relationship between the sliding friction and to determine the stiction, namely to calculate.
  • Fig. 3 illustrates for the piston 3, which is at a standstill in the position x7, the movement of the piston 3 when applying a pilot component, which corresponds to the difference ⁇ 7 between the valid in the position x7 sliding friction and static friction. If this pilot component is used to control the switching valve 12 and thus to influence the pressure in the pressure chamber 7, the position x of the piston changes along the hyperbolic motion curve 26, so that the piston 3 comes to a standstill in the position of FIG.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Braking Arrangements (AREA)
EP11779417.2A 2010-12-20 2011-11-08 Verfahren zur ansteuerung eines betätigungsmittels Withdrawn EP2655913A2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010063513.8A DE102010063513B4 (de) 2010-12-20 2010-12-20 Verfahren zur Ansteuerung eines Betätigungsmittels
PCT/EP2011/069597 WO2012084332A2 (de) 2010-12-20 2011-11-08 Verfahren zur ansteuerung eines betätigungsmittels

Publications (1)

Publication Number Publication Date
EP2655913A2 true EP2655913A2 (de) 2013-10-30

Family

ID=44910225

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11779417.2A Withdrawn EP2655913A2 (de) 2010-12-20 2011-11-08 Verfahren zur ansteuerung eines betätigungsmittels

Country Status (5)

Country Link
US (1) US9523377B2 (zh)
EP (1) EP2655913A2 (zh)
CN (1) CN103270331B (zh)
DE (1) DE102010063513B4 (zh)
WO (1) WO2012084332A2 (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9587684B2 (en) * 2015-02-17 2017-03-07 GM Global Technology Operations LLC Compensation for a drag force generated by a rotating clutch piston seal
DE102015215293B4 (de) * 2015-08-11 2020-07-09 Zf Friedrichshafen Ag Verfahren zur Bestimmung eines Systemdrucks in einem pneumatischen Stellsystem und Steuergerät zur Durchführung des Verfahrens
DE102019218520A1 (de) * 2019-11-29 2021-06-02 Zf Friedrichshafen Ag Verfahren zur Betätigung eines pneumatischen Stellaktuators

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3722152A1 (de) * 1987-07-04 1989-01-12 Bosch Gmbh Robert Daempfungsvorrichtung
US5056561A (en) * 1990-02-08 1991-10-15 Byers James O Remote controlled, individually pressure compensated valve
DE19850549A1 (de) * 1998-11-03 2000-05-04 Bosch Gmbh Robert Getriebe für ein Kraftfahrzeug, insbesondere Doppelkupplungs-Schaltgetriebe, und Verfahren zum Betreiben des Getriebes
EP1497151B1 (de) * 2002-04-10 2009-04-08 LuK Lamellen und Kupplungsbau Beteiligungs KG Verfahren zum betrieb eines kraftfahrzeuges
DE102004035262A1 (de) * 2004-07-21 2006-02-16 Zf Friedrichshafen Ag Verfahren zur Steuerung eines Automatgetriebes
DE102006021698A1 (de) 2006-05-10 2007-11-15 Zf Friedrichshafen Ag Verfahren zur Ansteuerung eines Betätigungsmittels
DE102006030142A1 (de) 2006-06-29 2008-01-03 Zf Friedrichshafen Ag Verfahren zur Steuerung einer automatisierten Reibungskupplung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2012084332A2 *

Also Published As

Publication number Publication date
US20130298757A1 (en) 2013-11-14
CN103270331B (zh) 2015-09-09
CN103270331A (zh) 2013-08-28
US9523377B2 (en) 2016-12-20
WO2012084332A2 (de) 2012-06-28
DE102010063513A1 (de) 2012-06-21
DE102010063513B4 (de) 2021-09-30
WO2012084332A3 (de) 2012-09-07

Similar Documents

Publication Publication Date Title
DE4309901B4 (de) Hydraulischer Stellantrieb - inbesondere für eine Kraftfahrzeug-Reibungskupplung
EP1067319B2 (de) Einrichtung zum Steuern einer Stelleinrichtung für ein Getriebe
DE102007056175B4 (de) Verfahren zum Befüllen eines Kupplungszylinders eines hydraulisch betätigbaren Kupplungssystems
DE29714652U1 (de) Stellantrieb mit Ventileinheiten zur Betätigung einer Reibungskupplung und eines automatisierten Schaltgetriebes
DE3447480A1 (de) Automatikgetriebe fuer ein kraftfahrzeug
EP2188543A1 (de) Elektrohydraulische steuerungsvorrichtung
EP2057393A1 (de) Hydraulische oder pneumatische steuerungseinrichtung eines automatisierten schaltgetriebes
WO2018046146A1 (de) Elektrohydraulisches system für die betätigung von kupplung(en) und gangsteller(n) von schaltgetrieben
EP3224495B1 (de) Kupplungsbetätigungsvorrichtung
EP2400165B1 (de) Pneumatischer Stellantrieb und Verfahren zum Betreiben des pneumatischen Stellantriebs
WO2016124196A1 (de) Kupplungsbetätigungsvorrichtung und verfahren zur betätigung einer solchen
DE102006003517A1 (de) Hydraulische Steuereinrichtung und Verfahren zur Ansteuerung zweier Aktuatoren
WO2008009547A1 (de) Kupplungssteller zur automatischen betätigung einer reibungskupplung
EP3408551B1 (de) Aktuator, insbesondere nehmerzylinder, für eine vorrichtung zur kupplungsbetätigung in einem kraftfahrzeug
WO2006056375A1 (de) Schaltunterstützungseinrichtung für ein manuell schaltbares handschaltgetriebe
DE102010063513B4 (de) Verfahren zur Ansteuerung eines Betätigungsmittels
EP2689165B1 (de) Verfahren zum steuern eines automatischen oder automatisierten schaltsystems
DE102018220161A1 (de) Verfahren zum Regeln eines Schaltsystems eines Getriebes
WO2017054815A1 (de) Fluidanordnung
DE10148083B4 (de) Hydraulische Betätigungssysteme
EP2016302B1 (de) Verfahren zur ansteuerung eines betätigungsmittels
WO2021122266A1 (de) Verfahren zur auflösung einer zahn-auf-zahn-stellung eines formschlüssigen schaltelements eines automatisierten schaltgetriebes und steuergerät
WO2007099035A1 (de) Druckregelungsvorrichtung für ein betätigungsmittel
DE102016004366A1 (de) Pneumatische Steuerungsvorrichtung eines automatisierten Schaltgetriebes und Verfahren zu deren Steuerung
EP0984185A2 (de) Hydraulische Stellvorrichtung zur Betätigung einer Kupplung, insbesondere für Kraftfahrzeuge

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20130516

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DAX Request for extension of the european patent (deleted)
17Q First examination report despatched

Effective date: 20140321

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20170513