DE102019218114A1 - Warm-up function for a converter gearbox - Google Patents
Warm-up function for a converter gearbox Download PDFInfo
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- DE102019218114A1 DE102019218114A1 DE102019218114.7A DE102019218114A DE102019218114A1 DE 102019218114 A1 DE102019218114 A1 DE 102019218114A1 DE 102019218114 A DE102019218114 A DE 102019218114A DE 102019218114 A1 DE102019218114 A1 DE 102019218114A1
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- input speed
- transmission
- temperature
- speed
- converter
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/10—Conjoint control of vehicle sub-units of different type or different function including control of change-speed gearings
- B60W10/11—Stepped gearings
- B60W10/115—Stepped gearings with planetary gears
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/18—Conjoint control of vehicle sub-units of different type or different function including control of braking systems
- B60W10/182—Conjoint control of vehicle sub-units of different type or different function including control of braking systems including control of parking brakes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units, or advanced driver assistance systems for ensuring comfort, stability and safety or drive control systems for propelling or retarding the vehicle
- B60W30/18—Propelling the vehicle
- B60W30/192—Mitigating problems related to power-up or power-down of the driveline, e.g. start-up of a cold engine
- B60W30/194—Mitigating problems related to power-up or power-down of the driveline, e.g. start-up of a cold engine related to low temperature conditions, e.g. high viscosity of hydraulic fluid
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- 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
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- 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
- F16H61/02—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 characterised by the signals used
- F16H61/0202—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 characterised by the signals used the signals being electric
- F16H61/0204—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 characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
- F16H61/0213—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 characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal characterised by the method for generating shift signals
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- 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
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/40—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism comprising signals other than signals for actuating the final output mechanisms
- F16H63/48—Signals to a parking brake or parking lock; Control of parking locks or brakes being part of the transmission
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- 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
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/40—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism comprising signals other than signals for actuating the final output mechanisms
- F16H63/50—Signals to an engine or motor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/10—Change speed gearings
- B60W2510/107—Temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/06—Combustion engines, Gas turbines
- B60W2710/0644—Engine speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/10—Change speed gearings
- B60W2710/1077—Change speed gearings fluid pressure, e.g. oil pressure
- B60W2710/1083—Change speed gearings fluid pressure, e.g. oil pressure pressure of control fluid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/18—Braking system
- B60W2710/186—Status of parking brakes
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- 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
- F16H61/02—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 characterised by the signals used
- F16H61/0202—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 characterised by the signals used the signals being electric
- F16H61/0204—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 characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
- F16H61/0213—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 characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal characterised by the method for generating shift signals
- F16H2061/0232—Selecting ratios for bringing engine into a particular state, e.g. for fast warming up or for reducing exhaust emissions
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- 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
- F16H61/02—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 characterised by the signals used
- F16H61/0202—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 characterised by the signals used the signals being electric
- F16H61/0204—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 characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
- F16H61/0213—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 characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal characterised by the method for generating shift signals
- F16H2061/0241—Adapting the ratio to special transmission conditions, e.g. shifts during warming up phase of transmission when fluid viscosity is high
Abstract
Die Erfindung betrifft ein Verfahren zum Erwärmen eines Getriebes; mit den Schritten- Blockieren der Sekundärseite eines Wandlers; Erhöhen einer Eingangsdrehzahl; und - Absenken der Eingangsdrehzahl. Die Eingangsdrehzahl wird vor Erreichen einer Zieltemperatur abgesenkt; wobei die Eingangsdrehzahl nach dem Absenken erneut erhöht wird.The invention relates to a method for heating a transmission; with the steps of blocking the secondary side of a converter; Increasing an input speed; and - lowering the input speed. The input speed is reduced before a target temperature is reached; wherein the input speed is increased again after lowering.
Description
Die Erfindung betrifft ein Verfahren nach dem Oberbegriff von Anspruch 1.The invention relates to a method according to the preamble of claim 1.
Tiefe Temperaturen führen dazu, dass das Öl in einem Automatikgetriebe zähflüssiger wird. Bei Baumaschinengetrieben kann dies dazu führen, dass es nicht mehr möglich ist, einen Gang einzulegen. Wird der Motor der Baumaschine laufen gelassen, während das Getriebe sich in Neutralstellung befindet, dauert es sehr lange, bis sich die Temperatur hinreichend erhöht hat.Low temperatures cause the oil in an automatic transmission to become more viscous. In the case of construction machinery transmissions, this can mean that it is no longer possible to engage a gear. If the engine of the construction machine is left running while the transmission is in neutral, it will take a very long time for the temperature to rise sufficiently.
Aus der Druckschrift
Der Erfindung liegt die Aufgabe zugrunde, bei der Erwärmung eines Automatikgetriebes Überhitzungsschäden vorzubeugen. Diese Aufgabe wird gelöst durch ein Verfahren nach Anspruch 1. Bevorzugte Weiterbildungen sind in den Unteransprüchen enthalten und ergeben sich aus nachfolgender Beschreibung.The invention is based on the object of preventing overheating damage when an automatic transmission is heated. This object is achieved by a method according to claim 1. Preferred developments are contained in the subclaims and result from the following description.
Das erfindungsgemäße Verfahren dient dazu, ein Getriebe auf eine Zieltemperatur zu erwärmen. Erwärmt wird mit dem Verfahren das im Getriebe enthaltene Öl. Durch Temperaturangleichung kommt es auch zu einer Erwärmung der übrigen Komponenten des Getriebes, sodass diese schließlich die Zieltemperatur erreichen.The method according to the invention is used to heat a transmission to a target temperature. The process heats the oil contained in the gearbox. By adapting the temperature, the other components of the transmission also heat up, so that they finally reach the target temperature.
Die Zieltemperatur kann in Abhängigkeit der Erfordernisse des jeweiligen Getriebes gewählt werden. Beispielsweise gibt es Baumaschinengetriebe, bei denen es nicht möglich ist, unterhalb einer Temperatur von -5°C einen Gang einzulegen. In diesem Fall wird eine Zieltemperatur von mehr als -5°C gewählt.The target temperature can be selected depending on the requirements of the respective transmission. For example, there are construction machinery transmissions in which it is not possible to engage a gear below a temperature of -5 ° C. In this case, a target temperature of more than -5 ° C is selected.
Das erfindungsgemäße Verfahren läuft bevorzugt automatisiert, das heißt ohne Steuerung durch einen Bediener ab. Gestartet wird das Verfahren auf Knopfdruck oder ebenso automatisiert. Ein automatisierter Start des Verfahrens erfolgt vorzugsweise in Abhängigkeit einer Temperatur des Getriebes. Liegt die Temperatur unterhalb eines Schwellwerts, wird das Verfahren automatisch gestartet. Der Schwellwert ist geringer als die Zieltemperatur oder stimmt mit dieser überein.The method according to the invention preferably runs automatically, that is to say without control by an operator. The process is started at the push of a button or can be automated. The method is preferably started automatically as a function of a temperature of the transmission. If the temperature is below a threshold value, the process is started automatically. The threshold value is lower than or corresponds to the target temperature.
Das Verfahren sieht vor, dass die Sekundärseite eines Wandlers des Getriebes blockiert wird. Dies bedeutet, dass die Turbinenradwelle des Wandlers bezüglich eines Gehäuses des Getriebes drehfest fixiert wird.The method provides that the secondary side of a converter of the transmission is blocked. This means that the turbine wheel shaft of the converter is fixed in a rotationally fixed manner with respect to a housing of the transmission.
Die drehfeste Fixierung der Turbinenradwelle kommt etwa zustande, indem mindestens eine Welle des Getriebes blockiert, das heißt bezüglich des Gehäuses drehfest fixiert wird. Bei der Welle handelt es sich bevorzugt um die Ausgangswelle. Diese lässt sich auf einfache Weise blockieren, indem eine Bremse des Fahrzeugs, in dem das Getriebe eingebaut ist, vorzugsweise die Parkbremse, geschlossen wird.The rotationally fixed fixing of the turbine wheel shaft comes about by blocking at least one shaft of the transmission, that is to say is fixed in a rotationally fixed manner with respect to the housing. The shaft is preferably the output shaft. This can be blocked in a simple manner by engaging a brake of the vehicle in which the transmission is installed, preferably the parking brake.
Weiterhin werden eines oder mehrere Schaltelemente, das heißt Kupplungen und/oder Bremsen des Getriebes derart geschlossen, dass ein Drehmomentfluss von der Turbinenradwelle zu der blockierten Welle zustande kommt. Durch den Drehmomentfluss zwischen der Turbinenradwelle und der blockierten Welle wird auch die Turbinenradwelle blockiert.Furthermore, one or more shifting elements, that is to say clutches and / or brakes of the transmission, are closed in such a way that a torque flow from the turbine wheel shaft to the blocked shaft occurs. The turbine wheel shaft is also blocked due to the flow of torque between the turbine wheel shaft and the blocked shaft.
Der Drehmomentfluss wird vorzugsweise hergestellt, indem eine Gangstufe des Getriebes eingelegt wird. Um die Anfahrneigung des Fahrzeugs zu minimieren, handelt es sich dabei bevorzugt um den höchsten Gang.The torque flow is preferably established by engaging a gear stage of the transmission. In order to minimize the tendency of the vehicle to start, this is preferably the highest gear.
Ist die Sekundärseite des Wandlers blockiert, wird eine Eingangsdrehzahl des Wandlers erhöht. Bei der Eingangsdrehzahl handelt es sich um die Drehzahl, mit der die Pumpenradwelle des Wandlers rotiert. Gewöhnlich ist die Pumpenradwelle zugleich Ausgangswelle des Getriebes, die drehwirksam, gewöhnlich drehfest, mit der Kurbelwelle eines Motors verbunden ist. Die Eingangsdrehzahl entspricht dann einer Motordrehzahl.If the secondary side of the converter is blocked, an input speed of the converter is increased. The input speed is the speed at which the impeller shaft of the converter rotates. Usually the impeller shaft is also the output shaft of the transmission, which is connected to the crankshaft of an engine in a rotationally effective, usually non-rotatable manner. The input speed then corresponds to an engine speed.
Nimmt die Eingangsdrehzahl zunächst einen ersten Wert an, ist die Erhöhung der Eingangsdrehzahl gleichbedeutend damit, dass die Eingangsdrehzahl einen zweiten Wert annimmt, der größer ist als der erste Wert. Bei dem ersten Wert handelt es sich bevorzugt um die Leerlaufdrehzahl des Motors.If the input speed initially assumes a first value, the increase in the input speed is synonymous with the input speed assuming a second value that is greater than the first value. The first value is preferably the idling speed of the engine.
Durch die Erhöhung der Eingangsdrehzahl erwärmt sich, wie eingangs beschrieben, das Getriebeöl. Schließlich wird die Eingangsdrehzahl wieder abgesenkt. Nach dem Absenken nimmt die Eingangsdrehzahl vorzugsweise wieder den ersten Wert an.As described above, increasing the input speed causes the transmission oil to heat up. Finally, the input speed is reduced again. After the reduction, the input speed preferably assumes the first value again.
Erfindungsgemäß wird die Eingangsdrehzahl nicht erst dann abgesenkt, wenn die Zieltemperatur erreicht ist, sondern vorher. Die Eingangsdrehzahl wird also vor Erreichen der Zieltemperatur abgesenkt. Dies impliziert, dass die Temperatur an mindestens einer Stelle des Getriebes gemessen wird. Die Eingangsdrehzahl wird abgesenkt, bevor die gemessene Temperatur die Zieltemperatur erreicht hat.According to the invention, the input speed is not only reduced when the target temperature has been reached, but rather beforehand. The input speed is therefore reduced before the target temperature is reached. This implies that the temperature is measured at at least one point on the transmission. The input speed is reduced before the measured temperature has reached the target temperature.
Bei der mindestens einen Stelle handelt es sich vorzugsweise um eine Stelle, die von dem Getriebeöl umspült wird. Indem Fall wird an der mindestens einen Stelle eine Öltemperatur gemessen. Die Eingangsdrehzahl wird abgesenkt, bevor die gemessene Temperatur die Zieltemperatur erreicht hat.The at least one point is preferably a point around which the transmission oil flows. In this case, an oil temperature is measured at the at least one point. The input speed is reduced before the measured temperature has reached the target temperature.
Wenn die Eingangsdrehzahl abgesenkt wurde, verlangsamt sich die Erwärmung des Getriebes. Dadurch lassen sich schädliche Temperaturspitzen in dem Getriebe vermeiden. Während das Getriebe mit abgesenkter Eingangsdrehzahl betrieben wird, findet ein Temperaturausgleich statt. Die Temperatur in Bereichen, die bereits stärker erwärmt wurden, gleicht sich den Temperaturen in anderen Bereichen an. Es resultiert eine weitestgehend homogene Temperaturverteilung in dem Getriebe.If the input speed has been reduced, the heating of the transmission slows down. This makes it possible to avoid harmful temperature peaks in the transmission. Temperature equalization takes place while the gearbox is operated with a reduced input speed. The temperature in areas that have already been heated to a higher level equals the temperatures in other areas. The result is a largely homogeneous temperature distribution in the transmission.
Da die Zieltemperatur beim Absenken der Eingangsdrehzahl noch nicht erreicht wurde, wird die Eingangsdrehzahl anschließend erneut erhöht. Die Verfahrensschritte Erhöhen und Absenken der Eingangsdrehzahl werden bevorzugt iterativ solange wiederholt, bis schließlich die Zieltemperatur erreicht ist.Since the target temperature has not yet been reached when the input speed was reduced, the input speed is then increased again. The method steps increasing and decreasing the input speed are preferably repeated iteratively until the target temperature is finally reached.
Zwischen dem Absenken und erneuten Erhöhen der Eingangsdrehzahl ist in einer bevorzugten Weiterbildung des Verfahrens mindestens eines der Schaltelemente des Getriebes geöffnet. Vorzugsweise sind alle Schaltelemente des Getriebes geöffnet. Schaltelemente sind in einem Zweitraum geöffnet, der nach oder mit Absenken der Eingangsdrehzahl beginnt und vor oder mit dem erneuten Erhöhen der Eingangsdrehzahl endet. Das Öffnen der Schaltelemente dient dazu, die Schaltelemente mit Öl zu spülen. Dadurch wird verhindert, dass sich innerhalb der Schaltelemente Temperaturspitzen bilden.In a preferred development of the method, at least one of the shifting elements of the transmission is open between the lowering and renewed increase of the input speed. All shift elements of the transmission are preferably open. Switching elements are opened in a second space that begins after or with the lowering of the input speed and ends before or with the renewed increase in the input speed. The opening of the switching elements serves to flush the switching elements with oil. This prevents temperature peaks from forming within the switching elements.
Eine erfindungsgemäße Anordnung umfasst mindestens ein Steuergerät. Dieses implementiert eine Ausführungsform des oben beschriebenen Verfahrens. Bei dem Steuergerät kann es sich etwa um ein Getriebe- und/oder Motorsteuergerät handeln.An arrangement according to the invention comprises at least one control device. This implements an embodiment of the method described above. The control device can be, for example, a transmission and / or engine control device.
Ein bevorzugtes Ausführungsbeispiel der Erfindung ist in
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1 ein Aufwärmverfahren für ein Getriebe.
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1 a warm-up procedure for a transmission.
In dem in
Zunächst wird der Motor gestartet. Entsprechend erhöht sich die Motordrehzahl
Um zu verhindern, dass im weiteren Verlauf des Verfahrens das Fahrzeug anrollt, muss die Parkbremse geschlossen werden. Entsprechend ändert sich deren Zustand
Hiernach wird ein Gang eingelegt. Dies spiegelt sich darin wider, dass der Kupplungsdruck
Erreicht der Kupplungsdruck
Schließlich wird die Motordrehzahl zurück auf die Leerlaufdrehzahl abgesenkt. Ist die Leerlaufdrehzahl erreicht, wird das Getriebe in Neutralposition geschaltet. Entsprechend sinkt der Kupplungsdruck
Bei Leerlaufdrehzahl erwärmt sich das Getriebe kaum. Dieser Zustand wird genutzt, um das Getriebe zu spülen und eventuell entstandene Temperaturspitzen auszugleichen.The transmission barely heats up at idle speed. This state is used to flush the gearbox and to compensate for any temperature peaks that may have occurred.
Mit dem Ende des Spülvorgangs ist eine erste Iteration
BezugszeichenlisteList of reference symbols
- 101101
- KupplungsdruckClutch pressure
- 103103
- MotordrehzahlEngine speed
- 105105
- BetätigungszustandActuation state
- 107107
- erste Iterationfirst iteration
- 109109
- zweite Iterationsecond iteration
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDED IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturPatent literature cited
- US 2016/0084371 A1 [0003]US 2016/0084371 A1 [0003]
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE102019218114.7A DE102019218114A1 (en) | 2019-11-25 | 2019-11-25 | Warm-up function for a converter gearbox |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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DE102019218114.7A DE102019218114A1 (en) | 2019-11-25 | 2019-11-25 | Warm-up function for a converter gearbox |
Publications (1)
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DE10218080A1 (en) * | 2001-04-24 | 2003-01-23 | Toyota Motor Co Ltd | Device for regulating a temperature of a fluid in a power transmission system and method for regulating a temperature in a power transmission system |
US20160084371A1 (en) * | 2014-09-23 | 2016-03-24 | Ford Global Technologies, Llc | Transmission Service Warm-Up Feature |
DE102015208008A1 (en) * | 2015-04-30 | 2016-11-03 | Zf Friedrichshafen Ag | Process for heating a hydrostatic-mechanical power split transmission |
DE102017122340A1 (en) * | 2017-09-27 | 2019-03-28 | Ford Global Technologies, Llc | METHOD AND SYSTEMS FOR A COOLANT SYSTEM |
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DE10218080A1 (en) * | 2001-04-24 | 2003-01-23 | Toyota Motor Co Ltd | Device for regulating a temperature of a fluid in a power transmission system and method for regulating a temperature in a power transmission system |
US20160084371A1 (en) * | 2014-09-23 | 2016-03-24 | Ford Global Technologies, Llc | Transmission Service Warm-Up Feature |
DE102015208008A1 (en) * | 2015-04-30 | 2016-11-03 | Zf Friedrichshafen Ag | Process for heating a hydrostatic-mechanical power split transmission |
DE102017122340A1 (en) * | 2017-09-27 | 2019-03-28 | Ford Global Technologies, Llc | METHOD AND SYSTEMS FOR A COOLANT SYSTEM |
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