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DE102006012341A1 - Process for operating a hydraulically actuated switching element comprises loading the switching element before actuation in the closed state with a pressure that is lower than the determined filling compensation pressure - Google Patents

Process for operating a hydraulically actuated switching element comprises loading the switching element before actuation in the closed state with a pressure that is lower than the determined filling compensation pressure Download PDF

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Publication number
DE102006012341A1
DE102006012341A1 DE200610012341 DE102006012341A DE102006012341A1 DE 102006012341 A1 DE102006012341 A1 DE 102006012341A1 DE 200610012341 DE200610012341 DE 200610012341 DE 102006012341 A DE102006012341 A DE 102006012341A DE 102006012341 A1 DE102006012341 A1 DE 102006012341A1
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DE
Germany
Prior art keywords
switching element
pressure
operating
hydraulically actuated
element according
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Withdrawn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
DE200610012341
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German (de)
Inventor
Michael Riedhammer
Michael Herlitzek
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ZF Friedrichshafen AG
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ZF Friedrichshafen AG
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Filing date
Publication date
Application filed by ZF Friedrichshafen AG filed Critical ZF Friedrichshafen AG
Priority to DE200610012341 priority Critical patent/DE102006012341A1/en
Publication of DE102006012341A1 publication Critical patent/DE102006012341A1/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/04—Smoothing ratio shift
    • F16H61/06—Smoothing ratio shift by controlling rate of change of fluid pressure
    • F16H61/061—Smoothing ratio shift by controlling rate of change of fluid pressure using electric control 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
    • 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
    • F16D2500/102—Actuator
    • F16D2500/1021—Electrical type
    • F16D2500/1023—Electric motor
    • F16D2500/1024—Electric motor combined with hydraulic 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
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/30—Signal inputs
    • F16D2500/302—Signal inputs from the actuator
    • 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
    • F16D2500/30—Signal inputs
    • F16D2500/316—Other signal inputs not covered by the groups above
    • F16D2500/3166—Detection of an elapsed period of time
    • 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
    • F16D2500/50—Problem to be solved by the control system
    • F16D2500/501—Relating the actuator
    • 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
    • F16D2500/50—Problem to be solved by the control system
    • F16D2500/501—Relating the actuator
    • F16D2500/5018—Calibration or recalibration of the actuator
    • 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
    • F16D2500/708—Mathematical model
    • 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
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/04—Smoothing ratio shift
    • F16H61/06—Smoothing ratio shift by controlling rate of change of fluid pressure
    • F16H61/061—Smoothing ratio shift by controlling rate of change of fluid pressure using electric control means
    • F16H2061/062—Smoothing ratio shift by controlling rate of change of fluid pressure using electric control means for controlling filling of clutches or brake servos, e.g. fill time, fill level or pressure during filling
    • 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
    • F16H—GEARING
    • F16H2342/00—Calibrating
    • F16H2342/04—Calibrating engagement of friction elements

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  • 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)

Abstract

Process for operating a hydraulically actuated switching element comprises loading the switching element before actuation in the closed state with a pressure that is lower than the determined filling compensation pressure on transition from the filling compensation phase into the pressure build-up phase. This pressure is set so that a previously defined air play is achieved. Preferred Features: If several switching elements are present, only those switching elements that satisfy previously defined criteria are loaded with pressure before actuation in the closed state.

Description

Die Erfindung bezieht sich auf ein Verfahren zum Betrieb eines hydraulisch betätigbaren Schaltelements nach der im Oberbegriff von Anspruch 1 näher definierten Art.The The invention relates to a method for operating a hydraulic actuated Switching element according to the closer defined in the preamble of claim 1 Art.

Gattungsgemäße Schaltelemente, wie beispielsweise Lamellenkupplungen, weisen eine Betätigungseinrichtung auf, welche durch Druckbeaufschlagung im Schließsinne betätigbar ist und dadurch die Lamellenkupplung oder -bremse im Schließsinne betätigt.Generic switching elements, such as multi-plate clutches, have an actuator on, which is actuated by pressurization in the closing direction and thereby the Multi-plate clutch or brake operated in the closing direction.

Die Betätigungseinrichtung weist hierfür einen Kolben auf, welcher durch die Druckbeaufschlagung gegen eine Federkraft verschoben werden kann. Durch Fertigungstoleranzen der Betätigungseinrichtung und/oder der Lamellen des Schaltelements oder durch Verschleiß des Schaltelements sind unterschiedliche Lüftspiele bei nichtbetätigtem Schaltelement vorhanden.The actuator points for this a piston which, by the pressurization against a Spring force can be moved. Due to manufacturing tolerances of actuator and / or the fins of the switching element or by wear of the switching element different airs when not actuated switching element available.

Die EP 0 866 930 B1 offenbart ein Verfahren zur automatisierten Abstimmung des Befüllvorgangs von Schaltelementen, um auch bei unterschiedlichen Lüftspielen ein zufriedenstellendes Schaltverhalten sicherzustellen. Hierfür wird ein Schnellfülldruck, eine Schnellfüllzeit, ein Füllausgleichsdruck und eine Füllausgleichszeit für das entsprechende Schaltelement schrittweise ermittelt, bis eine Drehzahländerung von einem Antriebsbauteil zu einem Abtriebsbauteil des Getriebes mit dem Beginn der Druckanstiegsphase erfolgt. Durch dieses Verfahren ist es möglich, den Füllausgleichsdruck zu ermitteln, bei welchem der Kolben der Betätigungseinrichtung so weit im Schließsinne betätigt ist, dass die Lamellen der Lamellenkupplung anliegen, aber noch kein Drehmoment übertragen. Durch dieses Verfahren wird die Schaltqualität verbessert, jedoch wird für jede Schaltung Zeit für die Schnellfüllphase und die Füllausgleichsphase benötigt, bis der Fahrer eine Reaktion auf die Schaltung verspürt.The EP 0 866 930 B1 discloses a method for automated tuning of the filling process of switching elements to ensure a satisfactory switching behavior even with different clearances. For this purpose, a Schnellfülldruck, a Schnellfüllzeit, a Füllausgleichsdruck and Füllgleichgleichszeit for the corresponding switching element is determined stepwise until a speed change from a drive component to a driven component of the transmission takes place with the beginning of the pressure rise phase. By this method, it is possible to determine the Füllausgleichsdruck, wherein the piston of the actuator is actuated so far in the closing direction, that the slats of the multi-plate clutch abut, but still transmit no torque. This method improves shift quality, but requires time for the quick fill phase and the fill balance phase for each shift until the driver senses a response to the shift.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein Verfahren zum Betrieb eines hydraulisch betätigbaren Schaltelements zu schaffen, mit welchem die Ansprechzeit des Schaltelements verkürzt werden kann.Of the The present invention is based on the object, a method for the operation of a hydraulically actuated switching element create, with which the response time of the switching element can be shortened can.

Die Aufgabe wird mit einem, auch die kennzeichnenden Merkmale des Hauptanspruchs aufweisenden Verfahren zum Betrieb eines hydraulisch betätigbaren Schaltelements gelöst.The The object is with a, even the characterizing features of the main claim having method for operating a hydraulically actuated Released switching element.

Erfindungsgemäß wird mindestens einmal, beispielsweise bei der Erstinbetriebnahme des Getriebes, der Füllausgleichsdruck ermittelt, bei welchem die Lamellen kein Lüftspiel mehr besitzen, jedoch noch kein Drehmoment übertragen können. Dies ist durch das Verfahren der EP 0 866 930 B1 möglich, welche hiermit vollständig mitumfaßt sein soll.According to the invention, the Füllausgleichsdruck is determined at least once, for example, during the initial commissioning of the transmission, in which the fins no longer have clearance but still can not transmit torque. This is by the method of EP 0 866 930 B1 possible, which should be included herewith completely.

Ist dieser Füllausgleichsdruck bekannt, werden die Schaltelemente, welche im Öffnungssinne betätigt sind, mit einem Druck beaufschlagt, welcher geringer ist als der Füllausgleichsdruck. Dieser Druck wird beispielsweise in Abhängigkeit der Federrate der Rückstellfeder des Kolbens der Betätigungseinrichtung so eingestellt, dass ein zuvor definiertes Lüftspiel des Schaltelements sich einstellt. Dadurch ist gewährleistet, dass das Schaltelement im geöffneten Zustand immer das gleiche Lüftspiel aufweist. Wird nun das Schaltelement im Schließsinne beaufschlagt, so weist das Schaltelement eine gleichbleibende Schaltqualität auch bei Verschleiß auf, und die Schaltzeit bis zum Übertragen eines Drehmoments ist sehr kurz, da die Betätigungseinrichtung schon vorbefüllt ist und das Lüftspiel einen definierten Wert, welcher gleichbleibend ist, annimmt.is this filling compensation pressure known, the switching elements which are actuated in the opening direction, subjected to a pressure which is less than the Füllausgleichsdruck. This pressure is, for example, depending on the spring rate of Return spring the piston of the actuator adjusted so that a previously defined clearance of the switching element to adjust. This ensures that that the switching element in the open Condition always the same clearance having. Now, if the switching element is acted upon in the closing direction, so has the switching element a consistent shift quality even at Wear on, and the switching time until transfer a torque is very short, since the actuator is already pre-filled and the clearance a defined value, which is constant, assumes.

In einer weiteren Ausgestaltungsform der Erfindung werden in einem Getriebe nur diejenigen Schaltelemente mit diesem Druck beaufschlagt, welche anhand von einer Logik, beispielsweise aus ermittelten Drehzahlen, für eine nächste Schaltung in Frage kommen. Die anderen, im Öffnungssinne betätigten Schaltelemente werden nicht mit diesem Druck beaufschlagt.In Another embodiment of the invention are in a Transmission only those switching elements subjected to this pressure, which is determined by a logic, for example, from determined rotational speeds, for a next circuit come into question. The other, operated in the opening direction switching elements are not pressurized with this pressure.

In einer weiteren Ausgestaltungsform der Erfindung wird zur Ermittlung dieses Drucks die Drehzahl der Betätigungseinrichtung mitberücksichtigt, wodurch beispielsweise ein Rotationsdruck, welcher zusätzlich auf die Betätigungseinrichtung wirkt, mitberücksichtigt werden kann.In Another embodiment of the invention is for the determination This pressure takes into account the speed of the actuator, whereby For example, a rotary pressure, which in addition to the actuator works, with consideration can be.

In einer weiteren Ausgestaltungsform der Erfindung wird die Ermittlung des Füllausgleichsdrucks bei jeder Inbetriebnahme des Fahrzeugs, beispielsweise bei "Zündung ein", durchgeführt.In In another embodiment of the invention, the determination at the filling equalization pressure each commissioning of the vehicle, for example, when "ignition on" carried out.

Das erfindungsgemäße Verfahren ist besonders vorteilhaft, wenn Schaltelemente, wie beispielsweise Kupplungen oder Lamellen, verwendet werden, dessen Bauteile bei der Fertigung eine eingeschränkte Toleranz aufweisen, und die Kupplungen oder Bremsen ohne weitere Einstellungen, wie beispielsweise Ausgleichsscheiben, montiert werden. Durch die Erfindung weisen auch diese Schaltelemente vor jeder Betätigung im Schließsinne ein definiertes Lüftspiel auf, wodurch diese Schaltelemente nicht mehr aufwendig eingestellt werden müssen.The inventive method is particularly advantageous when switching elements, such as Couplings or lamellae are used, whose components in the production a limited Tolerance, and the clutches or brakes without further Settings, such as shims to be mounted. By The invention also have these switching elements before each actuation in closing direction a defined clearance on, whereby these switching elements no longer set consuming Need to become.

Ebenso ist die Erfindung besonders vorteilhaft, wenn ein Getriebe Schaltelemente aufweist, welche über eine elektronische Steuereinheit automatisch betätigbar sind und die elektronische Steuereinheit einen manuellen Eingriff zuläßt, wodurch eine manuelle Betätigung der Schaltelemente eines Getriebes möglich wird.Likewise, the invention is particularly advantageous when a transmission has switching elements which are automatically actuated via an electronic control unit and the electronic control unit permits a manual intervention, whereby a Manual actuation of the switching elements of a transmission is possible.

Claims (6)

Verfahren zum Betrieb eines hydraulisch betätigbaren Schaltelements, welches durch Druckbeaufschlagung im Schließsinne betätigbar ist, und damit ein Antriebsbauteil mit einem Abtriebsbauteil verbindet, wobei bei Betätigung im Schließsinne ein Füllausgleichsdruck einer Füllausgleichsphase ermittelt wird, wobei hierbei eine Druckanstiegsphase der Füllausgleichsphase folgt und der Füllausgleichsdruck so eingestellt wird, dass beim Übergang von der Füllausgleichsphase zur Druckanstiegsphase eine Drehzahländerung zwischen dem Antriebsbauteil und dem Abtriebsbauteil auftritt, dadurch gekennzeichnet, dass das Schaltelement vor Betätigen im Schließsinne mit einem Druck beaufschlagt wird, welcher geringer als der ermittelte Füllausgleichsdruck beim Übergang von der Füllausgleichsphase zur Druckanstiegsphase ist, und dieser Druck so eingestellt wird, dass ein zuvor definiertes Lüftspiel entsteht.Method for operating a hydraulically actuated switching element, which is actuated by pressurization in the closing direction, and thus connects a drive component with a driven component, wherein a Füllausgleichsdruck a Füllausgleichsphase is determined when actuated in the closing direction, in which case a pressure rise phase of the Füllausgleichsphase follows and the Füllausgleichsdruck is set in that a change in rotational speed between the drive component and the driven component occurs during the transition from the filling compensation phase to the pressure increase phase, characterized in that the switching element is acted upon prior to actuation in the closing direction with a pressure which is lower than the determined Füllausgleichsdruck at the transition from the Füllausgleichsphase to pressure increase phase, and this pressure is adjusted so that a previously defined clearance arises. Verfahren zum Betrieb eines hydraulisch betätigbaren Schaltelements nach Anspruch 1, dadurch gekennzeichnet, dass bei mehreren Schaltelementen nur diejenige Schaltelemente vor Betätigen im Schließsinne mit dem Druck beaufschlagt werden, bei welchen zuvor definierte Kriterien erfüllt sind.Method for operating a hydraulically actuated Switching element according to claim 1, characterized in that at several switching elements only those switching elements before pressing in the closing direction with the pressure is applied to which previously defined criteria Fulfills are. Verfahren zum Betrieb eines hydraulisch betätigbaren Schaltelements nach Anspruch 2, dadurch gekennzeichnet, dass die Kriterien aus Drehzahlverhältnissen bestehen.Method for operating a hydraulically actuated Switching element according to claim 2, characterized in that the Criteria from speed ratios consist. Verfahren zum Betrieb eines hydraulisch betätigbaren Schaltelements nach Anspruch 1, dadurch gekennzeichnet, dass der Druck in Abhängigkeit der Drehzahl der Betätigungseinrichtung des Schaltelements eingestellt wird.Method for operating a hydraulically actuated Switching element according to claim 1, characterized in that the Pressure in dependence the speed of the actuator of the switching element is set. Verfahren zum Betrieb eines hydraulisch betätigbaren Schaltelements nach Anspruch 1, dadurch gekennzeichnet, dass das Schaltelement eine Lamellenkupplung eines Lastschaltgetriebes ist.Method for operating a hydraulically actuated Switching element according to claim 1, characterized in that the Switching element is a multi-plate clutch of a power shift transmission. Verfahren zum Betrieb eines hydraulisch betätigbaren Schaltelements nach Anspruch 5, dadurch gekennzeichnet, dass die Lamellenkupplung eine Betätigungseinrichtung aufweist, welche durch Druckbeaufschlagung gegen eine Federkraft im Schließsinne betätigt ist.Method for operating a hydraulically actuated Switching element according to claim 5, characterized in that the Multi-plate clutch an actuator having, which by pressurization against a spring force in the closing sense actuated is.
DE200610012341 2006-03-17 2006-03-17 Process for operating a hydraulically actuated switching element comprises loading the switching element before actuation in the closed state with a pressure that is lower than the determined filling compensation pressure Withdrawn DE102006012341A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE200610012341 DE102006012341A1 (en) 2006-03-17 2006-03-17 Process for operating a hydraulically actuated switching element comprises loading the switching element before actuation in the closed state with a pressure that is lower than the determined filling compensation pressure

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Application Number Priority Date Filing Date Title
DE200610012341 DE102006012341A1 (en) 2006-03-17 2006-03-17 Process for operating a hydraulically actuated switching element comprises loading the switching element before actuation in the closed state with a pressure that is lower than the determined filling compensation pressure

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DE102006012341A1 true DE102006012341A1 (en) 2007-09-20

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019063233A1 (en) * 2017-09-29 2019-04-04 Zf Friedrichshafen Ag METHOD FOR CONTROLLING AN AUTOMATIC TRANSMISSION

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19722954C1 (en) * 1997-05-31 1998-06-10 Zahnradfabrik Friedrichshafen Increasing vehicle automatic gear-box spontaneity with gear-changes as overlapping or cut-over changes
DE19750447A1 (en) * 1997-11-14 1999-06-02 Zahnradfabrik Friedrichshafen Method for controlling an automatic transmission
EP0866930B1 (en) * 1995-12-12 2000-03-01 ZF FRIEDRICHSHAFEN Aktiengesellschaft Process for automatically co-ordinating the filling operation of shift elements
DE10042147A1 (en) * 2000-08-26 2002-03-07 Zahnradfabrik Friedrichshafen Controling motor vehicle gearbox involves adapting change element pressure processes to compensate for component tolerances, further adaptation to compensate change quality influences
DE10051537A1 (en) * 2000-10-18 2002-04-25 Zahnradfabrik Friedrichshafen Method for automatic calculation of filling parameters esp. of automatic transmissions for motor vehicles uses indirect measuring to determine phasing values
DE10127157A1 (en) * 2001-06-02 2003-02-13 Zahnradfabrik Friedrichshafen Filling condition detection method for hydraulic switching element in autombile with automatic gearbox uses measurement of induction currents in proportional magnetic armatures
DE10251428A1 (en) * 2002-11-01 2004-05-19 Spicer Off-Highway Belgium N.V. Method and system for adapting an automatic clutch
DE10331370A1 (en) * 2003-07-11 2005-03-03 Zf Friedrichshafen Ag Automatic transmission with a hydraulically actuated switching element
DE102004007080A1 (en) * 2004-02-13 2005-11-10 Zf Friedrichshafen Ag Control method for a functional unit operates a function partly controlled/regulated by an electronic control device for adapting parameters
DE102004021167A1 (en) * 2004-04-29 2005-12-01 Zf Friedrichshafen Ag The system to optimize the action of an automatic gearbox sets the duration of the rapid filling phase to give a high spontaneity

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0866930B1 (en) * 1995-12-12 2000-03-01 ZF FRIEDRICHSHAFEN Aktiengesellschaft Process for automatically co-ordinating the filling operation of shift elements
DE19722954C1 (en) * 1997-05-31 1998-06-10 Zahnradfabrik Friedrichshafen Increasing vehicle automatic gear-box spontaneity with gear-changes as overlapping or cut-over changes
DE19750447A1 (en) * 1997-11-14 1999-06-02 Zahnradfabrik Friedrichshafen Method for controlling an automatic transmission
DE10042147A1 (en) * 2000-08-26 2002-03-07 Zahnradfabrik Friedrichshafen Controling motor vehicle gearbox involves adapting change element pressure processes to compensate for component tolerances, further adaptation to compensate change quality influences
DE10051537A1 (en) * 2000-10-18 2002-04-25 Zahnradfabrik Friedrichshafen Method for automatic calculation of filling parameters esp. of automatic transmissions for motor vehicles uses indirect measuring to determine phasing values
DE10127157A1 (en) * 2001-06-02 2003-02-13 Zahnradfabrik Friedrichshafen Filling condition detection method for hydraulic switching element in autombile with automatic gearbox uses measurement of induction currents in proportional magnetic armatures
DE10251428A1 (en) * 2002-11-01 2004-05-19 Spicer Off-Highway Belgium N.V. Method and system for adapting an automatic clutch
DE10331370A1 (en) * 2003-07-11 2005-03-03 Zf Friedrichshafen Ag Automatic transmission with a hydraulically actuated switching element
DE102004007080A1 (en) * 2004-02-13 2005-11-10 Zf Friedrichshafen Ag Control method for a functional unit operates a function partly controlled/regulated by an electronic control device for adapting parameters
DE102004021167A1 (en) * 2004-04-29 2005-12-01 Zf Friedrichshafen Ag The system to optimize the action of an automatic gearbox sets the duration of the rapid filling phase to give a high spontaneity

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019063233A1 (en) * 2017-09-29 2019-04-04 Zf Friedrichshafen Ag METHOD FOR CONTROLLING AN AUTOMATIC TRANSMISSION

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