WO2009121654A1 - Procédé de commande d’un moyen d’actionnement - Google Patents

Procédé de commande d’un moyen d’actionnement Download PDF

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Publication number
WO2009121654A1
WO2009121654A1 PCT/EP2009/051531 EP2009051531W WO2009121654A1 WO 2009121654 A1 WO2009121654 A1 WO 2009121654A1 EP 2009051531 W EP2009051531 W EP 2009051531W WO 2009121654 A1 WO2009121654 A1 WO 2009121654A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure medium
actuating means
valve assembly
cooling
controlled
Prior art date
Application number
PCT/EP2009/051531
Other languages
German (de)
English (en)
Inventor
Joachim Staudinger
Peter Herter
Franz Bitzer
Roland Mair
Rainer Petzold
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 WO2009121654A1 publication Critical patent/WO2009121654A1/fr

Links

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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D25/00—Fluid-actuated clutches
    • F16D25/12—Details not specific to one of the before-mentioned types
    • F16D25/123—Details not specific to one of the before-mentioned types in view of cooling and lubrication
    • 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
    • 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
    • F16D2500/304—Signal inputs from the clutch
    • F16D2500/30404—Clutch temperature
    • 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

Definitions

  • the present invention relates to a method for controlling an actuating means according to the preamble of patent claim 1.
  • an energy generated by a drive motor can be forwarded to the drive train, which ends with the drive wheels.
  • the energy loss that occurs in the clutch is converted to heat.
  • This heat energy in particular causes the components of the clutch to heat up and possibly reach high temperatures.
  • Such high temperatures for example the pressure plate or the flywheel, lead to increased wear of the clutch and thus to a reduced service life of the clutch.
  • actuation of the shift and / or starting clutch between the drive motor and transmission and the selection and switching of transmission gears via appropriate actuation means is automated.
  • actuation means are usually designed as hydraulically or pneumatically operable actuating means or as electrical actuating means.
  • DE 195 17 491 A1 discloses how the cooling of a transmission control device for a motor vehicle can be realized.
  • the motor vehicle has a transmission and control means which are actuated by a control fluid.
  • the control electronics of the control device is forcibly cooled by a targeted supply of the control fluid.
  • the control fluid is passed through a cooling plate on which the control electronics with optimum thermal conductivity is arranged.
  • the present invention has for its object to represent a method for controlling an actuating means, with which a cooling of the actuating means realized or improved and thus the life of the actuating means is increased.
  • the object underlying the invention is achieved by a, including the characterizing features of the main claim exhibiting, generic method for driving an actuating means.
  • the invention is based on a method for controlling an actuating means, in particular an actuating means in a motor vehicle drive train, wherein an actuating pressure for the actuating means via a pressure medium source, arranged in a first pressure medium line inlet valve arrangement and arranged in a second pressure medium line outlet valve arrangement is controlled ,
  • the inlet valve arrangement and the outlet valve arrangement are controlled or regulated in such a way that the actuating means adopts or retains a desired position, while the actuating means flows through a pressure medium volume flow for cooling the actuating means.
  • the desired position of the actuating means may be dependent on a driver request, for example.
  • the pressure means of the pressure medium source is used not only for actuating the actuating means (power transmission), but also to cool the actuating means according to the inventive method.
  • the inlet valve arrangement and the outlet valve arrangement can simultaneously be controlled so that the desired position of the actuating means is maintained, but the actuating means is flowed through by a pressure medium volume flow acting as a cooling flow.
  • the inlet valve arrangement and the outlet valve arrangement can be controlled such that both a pressure medium volume flow for actuating the actuating means and at the same time a pressure medium volume flow for cooling the actuating means is formed. In this case, the inlet valve arrangement must be controlled such that more pressure fluid flows into the actuating means, as can flow through the exhaust valve assembly again.
  • the intake and exhaust valve assemblies each include at least one valve. These valves may be formed, for example, as two-position valves with controllable pulse rate and with a controllable ⁇ réelles founded. Closing frequency can be actuated. Likewise, it is conceivable that the valves of the inlet and outlet valve arrangement are designed as proportional valves and the pressure medium volume flow for actuating or cooling the actuating means is controlled by appropriate control of the proportional valves.
  • the pressure medium volume flow for cooling the actuating means is controlled at least partially as a function of a temperature of the actuating means. If the temperature exceeds a predefinable limit value, then the inlet valve arrangement and the outlet valve arrangement can be controlled in such a way that the actuating means flows through a pressure medium volume flow as a cooling flow and is thus cooled.
  • the Temperature of the actuating means can be detected for example by a temperature sensor arranged on or in the actuating means.
  • the inlet and the outlet valve arrangement each comprise a first valve with a larger aperture cross-section and a second valve with a smaller aperture cross-section, which are arranged parallel to each other.
  • both valves of the inlet valve arrangement and both valves of the outlet valve arrangement are preferably actuated in order to generate the largest possible pressure medium volume flow as cooling flow through the actuating means, whereby a high heat dissipation is realized on the actuating means. Since a correspondingly lower heat removal is necessary below the predefinable temperature limit, preferably only one valve of the inlet valve arrangement and the corresponding valve of the outlet valve arrangement are actuated below the predefinable temperature limit.
  • the pressure medium volume flow flowing through the actuating means as a cooling flow can thus be adjusted or controlled in a temperature-dependent manner.
  • At least part of the pressure medium is forcibly guided onto the actuating means by a branch, which is preferably arranged in the second pressure medium line between the outlet valve arrangement and a pressure medium sink, that the actuating means in addition to the cooling by the pressure medium volume flow through the forcibly guided pressure medium is cooled.
  • a branch which is preferably arranged in the second pressure medium line between the outlet valve arrangement and a pressure medium sink, that the actuating means in addition to the cooling by the pressure medium volume flow through the forcibly guided pressure medium is cooled.
  • the actuating means is cooled by means of an additional cooling flow, if the cooling effect of the air flowing through the inlet valve arrangement and the outlet valve arrangement is cooled.
  • Controlled pressure medium volume flow to cool the actuator is too low.
  • a valve may be arranged in a further pressure medium line, wherein the pressure medium line is connected to the pressure medium source. If the valve is actuated, the pressure medium is passed from the pressure medium source through the pressure medium line and the valve to the actuating means to be cooled.
  • a pressure medium for the actuating means in particular a pneumatic or hydraulic medium can be used, for example air or oil or water.
  • a pneumatic medium preferably air
  • this pressure medium can be passed through the outlet valve arrangement and the second pressure medium line into a coupling bell space serving as a pressure medium depression.
  • the air in the coupling bell chamber is cooled by means of the pressure medium volume flow for actuating or cooling the actuating means, whereby the external heat is reduced to the actuating means.
  • the actuation means controlled by the method according to the invention can be designed, for example, as an actuating means for selecting and / or shifting transmission gears of an automated gearbox or for actuating a shift and / or starting clutch between the drive engine and the gearbox.
  • the shift or starting clutch can be actuated for example by a Gottausschreiber or a lever release or a release rocker.
  • a Monausschreiber for actuating a shift and / or starting clutch is arranged as a concentric with a transmission input shaft arranged piston-cylinder unit.
  • the central release is strongly heated.
  • the intake valve assembly and the exhaust valve assembly for the clutch release central release may be disposed in a transmission control unit.
  • the Monausschreiber can be cooled by the inventive method by targeted control of the intake valve assembly and the exhaust valve assembly with the pressure means for clutch actuation, for example, without the position of the clutch is changed.
  • FIG. 1 shows schematically a device 28 for actuating an actuating means 8, comprising a pressure medium source 10, an inlet valve arrangement 14 arranged in a first pressure medium line 24 and an outlet valve arrangement 20 arranged in a second pressure medium line 26.
  • the actuating means 8 serves to actuate a diaphragm spring clutch 2 and acts via a lever release on a diaphragm spring 4 of the diaphragm spring clutch 2.
  • the ssenstoffbeetzleybare actuating means 8 is actuated by driving the intake valve assembly 14 and the exhaust valve assembly 20 to output a travel.
  • the actuating means 8 is designed here as a piston-cylinder unit, wherein the piston is arranged axially displaceably in the cylinder of the piston-cylinder unit and limited to a medium filled with a pressure chamber 38.
  • the travel of the actuating means 8 is here via a known per se displacement measuring system 6 in the form of a displacement sensor in the region of a piston rod of the piston-cylinder Unit detected, which can be closed to the position of the clutch 2.
  • the intake valve assembly 14 is not actuated.
  • the inlet valve arrangement 14 and the outlet valve arrangement 20 are simultaneously controlled in such a way that the actuating means 8 flows through a pressure medium volume flow acting as a cooling flow.
  • the inlet valve arrangement 14 and the outlet valve arrangement 20 here each have two valves 12, 16 and 18, 22 arranged in parallel, which are designed as two-position valves and can be activated with a controllable pulse frequency.
  • the pressure medium volume flow through the valves 12, 16, 18, 22 is therefore not controlled by a change in the valve passage cross-section but by the number of opening / closing cycles per unit time.
  • Such valves have a structurally simple structure and Control technology easy handling high reliability and functional accuracy.
  • the valve 12 of the inlet valve assembly 14 has a smaller aperture cross-section here, and the valve 16 of the inlet valve assembly 14 has a larger aperture cross-section.
  • the valve 22 of the exhaust valve assembly 20 has a smaller orifice area and the valve 18 of the exhaust valve assembly 20 has a larger orifice area.
  • the pressure medium volume flow for cooling the actuating means 8 can be controlled at least partially as a function of the temperature of the actuating means 8.
  • the temperature of the actuating means 8 is measured here via a sensor 30 arranged on the actuating means 8.
  • the pressure medium volume flow for cooling the actuating means 8 can be controlled so that increases with the temperature of the pressure medium volume flow for cooling the actuating means 8, for example by the pressure medium speed is changed.
  • the control of the pressure medium volume flow for cooling the actuating means 8 as a function of the temperature of the actuating means 8 makes it possible to lead at a high temperature more pressure medium per time by the actuating means 8 in order to achieve a greater heat output by the actuating means 8.
  • the measured values detected by the temperature sensor 30 are processed further here in a microprocessor 32.
  • the microprocessor 32 may for example be part of a motor vehicle control unit 34, for example a clutch or transmission control unit.
  • the motor vehicle control unit 34 is connected via sensor lines with the required sensors. sensors (displacement sensor, temperature sensor, etc.) and via corresponding control lines to the valves 12, 16, 18, 22 of the inlet valve assembly 14 and the exhaust valve assembly 20.
  • the actuating means 8 On the temperature of the actuating means 8 can be closed in a further embodiment, when the temperatures of the drive motor, the shift and / or starting clutch and / or the transmission are already known about existing in the drive train sensors. Thus, depending on the temperature of the drive motor, the shift and / or starting clutch and / or the transmission to the temperature of the actuating means 8 closed or the temperature of the actuating means 8 can be estimated, whereby the actuating means 8 itself no additional temperature sensor 30 is necessary.
  • the temperature of the displacement sensor for detecting the travel of the actuating means 8 can also be closed in a further embodiment, when the temperature of the displacement sensor for detecting the travel of the actuating means 8 is known.
  • the temperature of the displacement sensor can be determined by measuring the coil resistance, since the coil resistance depends on the temperature. Higher coil temperatures increase the resistance of the coil of the displacement sensor.
  • the detected measured values of the coil resistance are further processed, for example, in the microprocessor 32. Taking into account the coil resistance at a reference temperature, for example at 20 degrees Celsius, it is possible to deduce the currently prevailing temperature at the travel sensor via the measured coil resistance.
  • the pressure medium is compressed to a pressure of for example 10 bar, for example by a compressor, not shown here, wherein the pressure medium is heated accordingly.
  • the compressed pressure medium is supplied via a feed line, not shown here, the pressure medium source 10, wherein the compressed pressure medium is cooled, for example to ambient temperature.
  • a decompression of the pressure medium since for actuation or cooling of the actuating means 8 in the pressure chamber 38 of the actuating means 8 only a lower pressure is required, for example, almost 0 to 5 bar.
  • the decompressed pressure medium in the pressure chamber 38 of the actuating means 8 is suitable for receiving a larger amount of heat, whereby the heat dissipation from the actuating means 8 is increased or improved by the pressure medium.

Abstract

La présente invention concerne un procédé de commande d'un moyen d'actionnement (8), une pression d'actionnement pour le moyen d'actionnement (8) étant commandée ou régulée par une source de fluide sous pression (10), un ensemble soupape d'admission (14) disposé dans une première conduite de fluide sous pression (24) et un ensemble soupape d'évacuation (20) disposé dans une seconde conduite de fluide sous pression (26). L'ensemble soupape d'admission (14) et l'ensemble soupape d'évacuation (20) sont commandés ou régulés selon l'invention de telle sorte que le moyen d'actionnement (8) adopte et/ou conserve une position théorique, tandis qu'il est traversé par un débit volumétrique de fluide sous pression destiné à le refroidir.
PCT/EP2009/051531 2008-03-31 2009-02-11 Procédé de commande d’un moyen d’actionnement WO2009121654A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008000882.6 2008-03-31
DE102008000882A DE102008000882A1 (de) 2008-03-31 2008-03-31 Verfahren zur Ansteuerung eines Betätigungsmittels

Publications (1)

Publication Number Publication Date
WO2009121654A1 true WO2009121654A1 (fr) 2009-10-08

Family

ID=40652691

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/051531 WO2009121654A1 (fr) 2008-03-31 2009-02-11 Procédé de commande d’un moyen d’actionnement

Country Status (2)

Country Link
DE (1) DE102008000882A1 (fr)
WO (1) WO2009121654A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6145644A (en) * 1998-10-16 2000-11-14 New Venture Gear, Inc. Multi-function control valve for hydraulic coupling
DE10103843A1 (de) * 2001-01-30 2002-08-01 Zf Sachs Ag Auf hydraulischem Wege betätigbares Kupplungssystem
WO2003019026A1 (fr) * 2001-08-23 2003-03-06 Kongsberg Automotive Asa Dispositif d'embrayage
US20040159523A1 (en) * 2003-02-14 2004-08-19 Duan Xiaohong N. Hydraulic coupling system
WO2007022889A2 (fr) * 2005-08-24 2007-03-01 Zf Friedrichshafen Ag Dispositif d'actionnement d'un embrayage a ressorts a diaphragme destine a des vehicules
DE102006014141A1 (de) * 2006-03-28 2007-10-04 Zf Friedrichshafen Ag Verfahren zur Steuerung einer automatisierten Reibungskupplung
DE102006022858A1 (de) * 2006-05-16 2007-11-22 Magna Powertrain Ag & Co Kg Druckabbaueinheit für eine hydromechanische, auf eine Drehzahldifferenz ansprechende Kupplung
EP1881222A1 (fr) * 2006-07-17 2008-01-23 HOERBIGER Antriebstechnik GmbH Procédé de commande d'un système hydraulique de commande pour transmission à double embrayage, et système hydraulique de commande pour transmission à double embrayage

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3731603C2 (de) * 1986-11-06 2001-11-22 Continental Teves Ag & Co Ohg Blockiergeschützte Fahrzeugbremsanlage
DE4135532A1 (de) * 1991-10-28 1993-04-29 Fibro Gmbh Positioniervorrichtung
DE19517491A1 (de) 1995-05-12 1996-11-14 Zahnradfabrik Friedrichshafen Kühlung für eine Getriebesteuerung
DE19958874A1 (de) * 1999-12-07 2001-06-13 Mannesmann Sachs Ag Betätigungseinrichtung für die Betätigung, insbesondere pneumatische Betätigung einer Reibungskupplung

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6145644A (en) * 1998-10-16 2000-11-14 New Venture Gear, Inc. Multi-function control valve for hydraulic coupling
DE10103843A1 (de) * 2001-01-30 2002-08-01 Zf Sachs Ag Auf hydraulischem Wege betätigbares Kupplungssystem
WO2003019026A1 (fr) * 2001-08-23 2003-03-06 Kongsberg Automotive Asa Dispositif d'embrayage
US20040159523A1 (en) * 2003-02-14 2004-08-19 Duan Xiaohong N. Hydraulic coupling system
WO2007022889A2 (fr) * 2005-08-24 2007-03-01 Zf Friedrichshafen Ag Dispositif d'actionnement d'un embrayage a ressorts a diaphragme destine a des vehicules
DE102006014141A1 (de) * 2006-03-28 2007-10-04 Zf Friedrichshafen Ag Verfahren zur Steuerung einer automatisierten Reibungskupplung
DE102006022858A1 (de) * 2006-05-16 2007-11-22 Magna Powertrain Ag & Co Kg Druckabbaueinheit für eine hydromechanische, auf eine Drehzahldifferenz ansprechende Kupplung
EP1881222A1 (fr) * 2006-07-17 2008-01-23 HOERBIGER Antriebstechnik GmbH Procédé de commande d'un système hydraulique de commande pour transmission à double embrayage, et système hydraulique de commande pour transmission à double embrayage

Also Published As

Publication number Publication date
DE102008000882A1 (de) 2009-10-01

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