WO2015074658A1 - Procédé permettant de déterminer la température d'un actionneur de boîte de vitesses - Google Patents

Procédé permettant de déterminer la température d'un actionneur de boîte de vitesses Download PDF

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Publication number
WO2015074658A1
WO2015074658A1 PCT/DE2014/200644 DE2014200644W WO2015074658A1 WO 2015074658 A1 WO2015074658 A1 WO 2015074658A1 DE 2014200644 W DE2014200644 W DE 2014200644W WO 2015074658 A1 WO2015074658 A1 WO 2015074658A1
Authority
WO
WIPO (PCT)
Prior art keywords
temperature
actuator
transmission
clutch
gear
Prior art date
Application number
PCT/DE2014/200644
Other languages
German (de)
English (en)
Inventor
Erhard Hodrus
Original Assignee
Schaeffler Technologies AG & Co. KG
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 Schaeffler Technologies AG & Co. KG filed Critical Schaeffler Technologies AG & Co. KG
Priority to DE112014005257.4T priority Critical patent/DE112014005257A5/de
Publication of WO2015074658A1 publication Critical patent/WO2015074658A1/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
    • F16H—GEARING
    • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/68—Inputs being a function of gearing status
    • F16H59/72—Inputs being a function of gearing status dependent on oil characteristics, e.g. temperature, viscosity
    • 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
    • F16H61/26—Generation or transmission of movements for final actuating mechanisms
    • F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
    • F16H61/32—Electric motors actuators or related electrical control means therefor
    • 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
    • F16H61/68—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 specially adapted for stepped gearings
    • F16H61/684—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 specially adapted for stepped gearings without interruption of drive
    • F16H61/688—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 specially adapted for stepped gearings without interruption of drive with two inputs, e.g. selection of one of two torque-flow paths by clutches

Definitions

  • the invention relates to a method for determining a temperature of a gear actuator, wherein the, a drive motor comprehensive gear actuator allows an automated engagement and / or laying a gear of a transmission.
  • a motor vehicle in which the control of a transmission via a gear actuator takes place, which comprises an electric motor.
  • the actuator is controlled by a transmission control unit.
  • a gear actuator By means of the gear actuator, an automated actuation of the transmission gear ratio is enabled. Under automated operation of the transmission while the controlled gear selection of the transmission is understood by the gear actuator.
  • DE 10 2005 061 078 A1 discloses a method for controlling a dual-clutch transmission, wherein the dual-clutch transmission is automatically controlled in dependence on a temperature signal.
  • the temperature signal used here is the temperature of the transmission oil. Alternatively, however, cooling water temperature and ambient temperature can also be used.
  • Clutch bell has a temperature sensor which measures a clutch temperature, which is determined using an active bell air cooling with increased accuracy by means of a coupling temperature model.
  • the ohmic resistance and the motor constant are dependent on the temperature. While the ohmic resistance of the motor coils increases by 40% when the temperature increases by 100 ° C, the motor constant decreases by 1 1%. If, for example, a defined force is to be set at -30 ° C. on the gearbox actuator, this force is converted into a proportional moment, the momentum into a proportional current, to which an associated voltage is set. Since the temperature has no influence on the determination of this stress, the forces are set very inaccurately, which is especially true at very low or very high temperatures. is a disadvantage.
  • the invention is therefore based on the object to provide a method for determining a temperature of a gear actuator, in which a precise determination of the temperature of a gear actuator ensures reliable control of the electric motor of the gear actuator.
  • the object is achieved in that the temperature of the gear actuator is determined by a temperature sensor installed in the vicinity of the transmission.
  • a temperature sensor of the transmission motor which is present in the motor vehicle for determining the temperature of the transmission actuator has the advantage that it is possible to dispense with structural alteration of the transmission actuator by installing an additional temperature sensor.
  • the control of the gear actuator as a function of the temperature determined in the gearbox actuator improves the shifting accuracy of the transmission, so that a tendency for failure of a gear engagement process or homing in the transmission can be significantly reduced. Due to the determination of the transmission reactor temperature, the forces in the gear actuator can be set more precisely and thus significantly reduce the gear shifting tolerances.
  • the temperature sensor of an automated clutch actuator is used to determine the temperature of the gear actuator, which is driven by an electric motor, and the temperature sensor is arranged on a board next to a control electronics, the clutch actuator is mounted directly on the gearbox. Since the clutch forms an active unit with the transmission, it can be assumed that the clutch actuator is always in the vicinity of the transmission, and thus exposed to a similar temperature as the transmission. In particular, clutch actuators are fixedly secured to the transmission, from which it can be concluded that the transmission actuator is also subject to a similar temperature, for which reason the temperature measured in the clutch actuator can be applied to the transmission actuator and its control.
  • a hydrostatic clutch actuator is used as the clutch actuator, which is installed on a dual-clutch transmission.
  • a hydrostatic Clutch actuator has an electric motor to which a circuit board is mounted with a control electronics and a computing unit. There are temperature sensors on the board and in the processing unit. This temperature supplied by the temperature sensors is simply sent to the transmission control unit via a communication line, preferably a CAN bus, where it can be used to control the transmission actuator.
  • a cooling water temperature sensor and / or an outside air temperature sensor and / or a temperature sensor arranged on a board of a transmission control unit are used to determine the temperature of the transmission actuator. Since these different sensors are present in each motor vehicle in the engine compartment and thus have a certain proximity to the transmission, they can form a basis for determining the temperature of the gear actuator.
  • the temperature of the gear actuator is determined by means of a transmission oil temperature sensor in a wet-running clutch. Again, it can be assumed that due to the proximity of the geared actuator to the wet-running clutch, the temperature provided by the transmission oil temperature sensor approximately reflects the temperature to which the transmission actuator is exposed.
  • the temperature of the geared actuator is determined from an average value of the temperature values supplied by the various temperature sensors.
  • the temperature values of an outside air temperature sensor and a cooling water temperature sensor which are not ideally located directly on the transmission, correct and evaluate by the transmission oil temperature, which is measured close to the transmission.
  • Temperature of the gear actuator determined from different weights of the temperatures supplied by the different temperature sensors. In the weighting can enter into the distance of the various sensors to the transmission actuator, so that the temperature value of the temperature sensor, which is located very close to the transmission actuator is more into the calculation than the temperature values of the temperature sensors placed away from the gear actuator.
  • the weighting of the temperature values of the different sensors is dependent on the temperature values provided by these temperature value sensors, preferably non-linear. Since at very high and very low temperatures the greatest influence of the temperature is exerted on the control of the electric motor of the gear actuator and thus on the gear engagement processes performed by the transmission, other weighting factors can be determined at these temperatures than at intervening temperatures. Thus, the weighting of the temperature is adapted to the currently existing environmental conditions of the motor vehicle or the transmission.
  • the temperature determined for the gearbox actuator is used as the base temperature in a gearbox reactor temperature model. Due to the existing temperature, a temperature model can now be created for the first time for the gearbox actuator. Such a transmission reactor temperature model attempts to estimate an actual temperature, taking into account the power flow through the transmission actuator.
  • FIG. 1 shows a first exemplary embodiment of the use of temperature sensors arranged in the motor vehicle for determining a temperature of a geared actuator
  • FIG. 2 shows a second exemplary embodiment for the use of temperature sensors arranged in the motor vehicle for determining a temperature of a geared actuator
  • Figure 3 shows a third embodiment of the use of arranged in the motor vehicle temperature sensors for determining a temperature of a gear actuator.
  • Figure 1 shows a first embodiment for use in the motor vehicle
  • the motor vehicle is characterized by the internal combustion engine 1, which is connected via a coupling 2 with a transmission 3.
  • a transmission actuator 4 is arranged, which is controlled by a transmission control unit 5.
  • a cooling water temperature sensor 6 is fastened to the internal combustion engine 1, while an outside air temperature sensor 7, preferably behind the bumper of the motor vehicle, is fastened outside the drive train.
  • the cooling water temperature sensor 6 and the outside air temperature sensor 7 deliver their temperature values to the transmission control unit 5, which estimates a temperature of the transmission actuator 4 from the temperature values of these temperature sensors 6, 7 arranged in the engine compartment close to the transmission 3.
  • the actual temperature of the gear actuator 4 is determined.
  • an electric motor 8 which is encompassed by the transmission actuator 4 and which triggers the switching operations in the transmission 3, is controlled.
  • Gear actuator 4 are determined accurately, since the mechanical tolerances are reduced due to the temperature consideration. This ensures that by means of the temperature model, a failure of a gear engagement process in the transmission 3 or of reference trains in the transmission 3 significantly decreases.
  • a hydrostatic actuator (hydrostatic clutch actuator) 9 is additionally arranged on the transmission 3. Since the hydrostatic actuator 9 is installed near the transmission 3 in the engine compartment, there is now another temperature sensor 10 in the immediate vicinity of the transmission 3.
  • the transmission 3 is designed as a double-clutch transmission, wherein the clutch 2 is actuated directly via a hydrostatic section, not shown and the internal combustion engine 1 coupled to the transmission 3 or decoupled.
  • a piston of a master cylinder is adjusted by an electric motor, wherein the hydrostatic fluid in the system actuates a piston in the slave cylinder.
  • the piston of the slave cylinder acts directly on a clutch plate, which clamps a clutch disc and thus allows the transmission of a clutch torque.
  • the clutch 2 is usually closed only as far as is necessary in order to transmit the requested clutch torque can.
  • the hydrostatic actuator 9 has an electric motor 1 1, to which a circuit board 12 with a control electronics 13 and a computing unit 14 is mounted.
  • the hydrostatic actuator 9 is connected to the transmission control unit 5 via a CAN bus 15. Since the output stages of the electric motors 8 of the gear actuator 4 are installed in the gearbox control unit 5, the gearbox control unit 5 uses the temperature values supplied by the temperature sensor 10 of the hydrostatic actuator 9 designed as a clutch actuator to calculate a drive voltage of the electric motor 8 of the gearbox actuator 4. The gearbox control unit 5 picks up the temperature values supplied by the temperature sensor 10 as the temperature of the gear actuator 4 and processed with the transmission reactor temperature model, as already explained.
  • FIG. 3 shows a further exemplary embodiment of a wet clutch 2, in which, in addition to the temperature sensors 6, 7, 10 mentioned in FIGS. 1 and 2, there is a transmission oil temperature sensor 16 arranged in the transmission 3.
  • the temperature of the transmission oil is also forwarded to the transmission control unit 5.
  • the transmission control unit 5 can thus evaluate the temperatures of the cooling water temperature sensor 6, the outside air temperature sensor 7, the transmission oil temperature sensor 16 and the temperature sensor 10 of the clutch actuator 9 individually or jointly. If the temperature values of a plurality of temperature sensors 6, 7, 10, 16 are to be evaluated, then the temperature values of the temperature sensors 6, 7, 10, 16 can be combined by different weightings, the averaging constituting a special case. However, it may also be meaningful that the weighting of the temperature values of the individual temperature sensors 6, 7, 10, 16 is not performed linearly as a function of the displayed temperature values.
  • the present invention shows a method for determining the temperature of a
  • Gear actuator 4 which can be preferably included as the base temperature in a transmission reactor temperature model.
  • the transmission reactor temperature of the board temperature of one of the two hydrostatic actuators 9 of a Doppelkupp- geared equal.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Control Of Transmission Device (AREA)
  • Hybrid Electric Vehicles (AREA)

Abstract

L'invention concerne un procédé permettant de déterminer la température d'un actionneur de boîte de vitesses (4). Selon ledit procédé, l'actionneur de boîte de vitesses qui comprend un moteur d'entraînement (8) permet un enclenchement et/ou un désenclenchement automatisés d'une vitesse d'une boîte de vitesses (3). Selon ce procédé permettant de déterminer la température d'un actionneur de boîte de vitesses, la température de l'actionneur de boîte de vitesses est déterminée par un capteur de température (6, 7, 10, 16) monté à proximité de la boîte de vitesses.
PCT/DE2014/200644 2013-11-19 2014-11-18 Procédé permettant de déterminer la température d'un actionneur de boîte de vitesses WO2015074658A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112014005257.4T DE112014005257A5 (de) 2013-11-19 2014-11-18 Verfahren zur Bestimmung einer Temperatur eines Getriebeaktors

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013223596 2013-11-19
DE102013223596.8 2013-11-19

Publications (1)

Publication Number Publication Date
WO2015074658A1 true WO2015074658A1 (fr) 2015-05-28

Family

ID=52133755

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2014/200644 WO2015074658A1 (fr) 2013-11-19 2014-11-18 Procédé permettant de déterminer la température d'un actionneur de boîte de vitesses

Country Status (2)

Country Link
DE (1) DE112014005257A5 (fr)
WO (1) WO2015074658A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19723393A1 (de) * 1996-06-05 1997-12-11 Luk Getriebe Systeme Gmbh Kraftfahrzeug
DE19900820A1 (de) * 1998-01-16 1999-09-09 Luk Getriebe Systeme Gmbh Servounterstützungsvorrichtung für ein Getriebe
EP1184607A1 (fr) * 2000-08-31 2002-03-06 AISIN AI Co., Ltd. Dispositif de commande pour un actionneur d'une transmission
DE10239012A1 (de) * 2002-08-20 2004-03-04 Robert Bosch Gmbh Verfahren und Vorrichtung zur thermischen Überwachung eines Aktuators
US20080161155A1 (en) * 2006-12-28 2008-07-03 Yamaha Hatsudoki Kabushiki Kaisha Transmission, Straddle-Type Vehicle Provided with the Same, and Control Method for Transmission
WO2011093787A1 (fr) * 2010-02-01 2011-08-04 Scania Cv Ab Procédé et système se rapportant à un embrayage à commande automatique

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19723393A1 (de) * 1996-06-05 1997-12-11 Luk Getriebe Systeme Gmbh Kraftfahrzeug
DE19900820A1 (de) * 1998-01-16 1999-09-09 Luk Getriebe Systeme Gmbh Servounterstützungsvorrichtung für ein Getriebe
EP1184607A1 (fr) * 2000-08-31 2002-03-06 AISIN AI Co., Ltd. Dispositif de commande pour un actionneur d'une transmission
DE10239012A1 (de) * 2002-08-20 2004-03-04 Robert Bosch Gmbh Verfahren und Vorrichtung zur thermischen Überwachung eines Aktuators
US20080161155A1 (en) * 2006-12-28 2008-07-03 Yamaha Hatsudoki Kabushiki Kaisha Transmission, Straddle-Type Vehicle Provided with the Same, and Control Method for Transmission
WO2011093787A1 (fr) * 2010-02-01 2011-08-04 Scania Cv Ab Procédé et système se rapportant à un embrayage à commande automatique

Also Published As

Publication number Publication date
DE112014005257A5 (de) 2016-09-08

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