DE102019215434A1 - Method and control device for determining a transmission reserve of a frictional shifting element of a transmission - Google Patents
Method and control device for determining a transmission reserve of a frictional shifting element of a transmission Download PDFInfo
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- DE102019215434A1 DE102019215434A1 DE102019215434.4A DE102019215434A DE102019215434A1 DE 102019215434 A1 DE102019215434 A1 DE 102019215434A1 DE 102019215434 A DE102019215434 A DE 102019215434A DE 102019215434 A1 DE102019215434 A1 DE 102019215434A1
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- frictional
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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
- F16H61/26—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
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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
- 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
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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
- F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/10—System to be controlled
- F16D2500/104—Clutch
- F16D2500/10443—Clutch type
- F16D2500/1045—Friction clutch
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/30—Signal inputs
- F16D2500/302—Signal inputs from the actuator
- F16D2500/3023—Force
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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
- 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
- F16D2500/3041—Signal inputs from the clutch from the input shaft
- F16D2500/30412—Torque of the input shaft
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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
- 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
- F16D2500/3042—Signal inputs from the clutch from the output shaft
- F16D2500/30421—Torque of the output shaft
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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
- 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
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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
- 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
- F16D2500/51—Relating safety
- F16D2500/5104—Preventing failures
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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
- 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
- F16D2500/51—Relating safety
- F16D2500/5114—Failsafe
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/70—Details about the implementation of the control system
- F16D2500/706—Strategy of control
- F16D2500/70673—Statistical calculations
- F16D2500/70689—Statistical calculations using maximum or minimum values
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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
- 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
- F16D2500/71—Actions
- F16D2500/7101—Driver alarm
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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
- F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures
- F16H2061/1232—Bringing the control into a predefined state, e.g. giving priority to particular actuators or gear ratios
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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
- F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures
- F16H2061/1256—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures characterised by the parts or units where malfunctioning was assumed or detected
- F16H2061/1276—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures characterised by the parts or units where malfunctioning was assumed or detected the failing part is a friction device, e.g. clutches or 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
- F16H61/26—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
- F16H2061/2823—Controlling actuator force way characteristic, i.e. controlling force or movement depending on the actuator position, e.g. for adapting force to synchronisation and engagement of gear clutch
Abstract
Verfahren zur Bestimmung einer Übertragungsreserve eines reibschlüssigen Schaltelements eines Getriebes mit zumindest folgenden Schritten: Ermitteln (10) einer Anpresskraft des reibschlüssigen Schaltelements für mehrere Positionen des Schaltelements. Ermitteln (11) eines von dem reibschlüssigen Schaltelement übertragenen Moments für eine Teilmenge der mehreren Positionen des Schaltelements. Berechnen (12) eines Quotienten aus der Anpresskraft des reibschlüssigen Schaltelements und dem von dem reibschlüssigen Schaltelement übertragenen Moment für mindestens eine Position des Schaltelements, für welche die Anpresskraft und das übertragene Moment vorliegen. Berechnen (15) eines von dem reibschlüssigen Schaltelement maximal übertragbaren Moments aus dem berechneten Quotienten und der Anpresskraft in einem Zupunkt des reibschlüssigen Schaltelements. Bestimmen (17) der Übertragungsreserve durch Berechnung eines Verhältnisses aus dem maximal von dem reibschlüssigen Schaltelement übertragbaren Moment und einem maximalen Antriebsaggregatmoment eines mit dem Getriebe gekoppelten Antriebsaggregats. Method for determining a transmission reserve of a frictional shifting element of a transmission with at least the following steps: determining (10) a contact pressure of the frictional shifting element for several positions of the shifting element. Determination (11) of a torque transmitted by the frictional shifting element for a subset of the multiple positions of the shifting element. Calculating (12) a quotient from the contact pressure of the frictional shift element and the torque transmitted by the frictional shift element for at least one position of the shift element for which the contact force and the transmitted torque are present. Calculating (15) a maximum torque that can be transmitted by the frictional shifting element from the calculated quotient and the contact force at a point of the frictional shifting element. Determination (17) of the transmission reserve by calculating a ratio of the maximum torque that can be transmitted by the frictional shifting element and a maximum drive assembly torque of a drive assembly coupled to the transmission.
Description
Die Erfindung betrifft ein Verfahren zur Bestimmung einer Übertragungsreserve eines reibschlüssigen Schaltelements eines Getriebes und ein Steuergerät zur Durchführung des Verfahrens.The invention relates to a method for determining a transmission reserve of a frictional shifting element of a transmission and a control unit for carrying out the method.
Für den ordnungsgemäßen Betrieb eines Getriebes mit reibschlüssigen Schaltelementen, die als Kupplungen oder Bremsen ausgeführt sein können, ist die Kenntnis einer Übertragungsreserve des jeweiligen reibschlüssigen Schaltelements von Bedeutung. Die Übertragungsreserve hängt vom Verschleißzustand des Schaltelements ab. Je größer der Verschleiß des reibschlüssigen Schaltelements ist, desto geringer ist die Übertragungsreserve.For the correct operation of a transmission with frictional shifting elements, which can be designed as clutches or brakes, the knowledge of a transmission reserve of the respective frictional shifting element is important. The transmission reserve depends on the state of wear of the switching element. The greater the wear on the frictional shifting element, the lower the transmission reserve.
Aus der
Aus
Aus
Bislang bereitet es Schwierigkeiten, die Übertragungsreserve eines reibschlüssigen Schaltelements einfach und zuverlässig zu bestimmen.So far, it has been difficult to determine the transmission reserve of a frictional shifting element simply and reliably.
Hiervon ausgehend liegt der Erfindung die Aufgabe zu Grunde, ein Verfahren zur Bestimmung einer Übertragungsreserve eines reibschlüssigen Schaltelements eines Getriebes und ein entsprechendes Steuergerät zu schaffen.Proceeding from this, the invention is based on the object of creating a method for determining a transmission reserve of a frictional shifting element of a transmission and a corresponding control device.
Diese Aufgabe wird durch ein Verfahren gemäß Patentanspruch 1 gelöst. Das erfindungsgemäße Verfahren umfasst zumindest die folgenden Schritte:
- Ermitteln einer Anpresskraft des reibschlüssigen Schaltelements für mehrere Positionen des Schaltelements. Ermitteln eines von dem reibschlüssigen Schaltelement übertragenen Moments für eine Teilmenge der mehreren Positionen des Schaltelements. Berechnen eines Quotienten aus der Anpresskraft des reibschlüssigen Schaltelements und dem von dem reibschlüssigen Schaltelement übertragenen Moment für mindestens eine Position des Schaltelements, für welche die Anpresskraft und das übertragene Moment vorliegen. Berechnen eines von dem reibschlüssigen Schaltelement maximal übertragbaren Moments aus dem berechneten Quotienten und der Anpresskraft in einem Zupunkt des reibschlüssigen Schaltelements. Bestimmen der Übertragungsreserve durch Berechnung eines Verhältnisses aus dem maximal von dem reibschlüssigen Schaltelement übertragbaren Moment und einem maximalen Antriebsaggregatmoment eines mit dem Getriebe gekoppelten Antriebsaggregats.
- Determining a contact pressure of the frictional switching element for several positions of the switching element. Determining a torque transmitted by the frictional shifting element for a subset of the multiple positions of the shifting element. Calculating a quotient from the contact pressure of the frictional shift element and the torque transmitted by the frictional shift element for at least one position of the shift element for which the contact force and the transmitted torque are present. Calculating a maximum torque that can be transmitted by the frictional shifting element from the calculated quotient and the contact force at a point of the frictional shifting element. Determining the transmission reserve by calculating a ratio of the maximum torque that can be transmitted by the frictional shifting element and a maximum drive assembly torque of a drive assembly coupled to the transmission.
Mit der Erfindung ist eine einfache und zuverlässige Bestimmung der Übertragungsreserve eines reibschlüssigen Schaltelements eines Getriebes möglich.With the invention, a simple and reliable determination of the transmission reserve of a frictional shifting element of a transmission is possible.
Das reibschlüssige Schaltelement des Getriebes kann beispielsweise als Schaltelement zum Schalten von zumindest einer Übersetzungsstufe des Getriebes ausgebildet sein. Auch kann das reibschlüssige Schaltelement des Getriebes als Schalt- und/oder Anfahrkupplung des Getriebes ausgebildet sein, welche in einem Antriebsstrang zwischen einem Antriebsaggregat und dem Getriebe angeordnet ist.The frictional shifting element of the transmission can be designed, for example, as a shifting element for shifting at least one gear ratio of the transmission. The frictional shifting element of the transmission can also be designed as a shifting and / or starting clutch of the transmission, which is arranged in a drive train between a drive unit and the transmission.
Als Zupunkt des reibschlüssigen Schaltelements soll eine Position des Schaltelements verstanden werden, an welcher das reibschlüssige Schaltelement ein maximales Moment übertragen kann.The point of the frictional shifting element is to be understood as a position of the shifting element at which the frictional shifting element can transmit a maximum torque.
Nach einer vorteilhaften Weiterbildung der Erfindung wird dann, wenn für mehrere Positionen des Schaltelements die Anpresskraft und das übertragene Moment vorliegen, für diese mehreren Positionen der Quotient berechnet, wobei aus den mehreren Quotienten ein Mittelwert gebildet wird, und wobei das maximal von dem reibschlüssigen Schaltelement übertragbare Moment aus dem Mittelwert der Quotienten und der Anpresskraft in dem Zupunkt des reibschlüssigen Schaltelements berechnet wird. Hiermit kann die Bestimmung der Übertragungsreserve weiter verbessert werden.According to an advantageous development of the invention, if the contact force and the transmitted torque are present for several positions of the switching element, the quotient is calculated for these several positions, a mean value being formed from the several quotients, and the maximum that can be transmitted by the frictional switching element Torque is calculated from the mean value of the quotients and the contact force in the point of the frictional shifting element. In this way, the determination of the transmission reserve can be further improved.
Nach einer vorteilhaften Weiterbildung der Erfindung wird, wenn die Übertragungsreserve kleiner als ein Grenzwert ist, eine Warnmeldung generiert. Abhängig von der Übertragungsreserve kann auch ein Wartungsintervall für das Getriebe ermittelt werden. Dies ist bevorzugt, um abhängig von der bestimmten Übertragungsreserve einen ordnungsgemäßen Betrieb des Getriebes zu gewährleisten.According to an advantageous development of the invention, if the transmission reserve is less than a limit value, a warning message is generated. Depending on the transmission reserve, a maintenance interval for the transmission can also be determined. This is preferred in order to ensure proper operation of the transmission as a function of the transmission reserve determined.
Das erfindungsgemäße Steuergerät ist in Anspruch 6 definiert.The control device according to the invention is defined in claim 6.
Bevorzugte Weiterbildungen ergeben sich aus den Unteransprüchen und der nachfolgenden Beschreibung. Ausführungsbeispiele der Erfindung werden, ohne hierauf beschränkt zu sein, an Hand der Zeichnung näher erläutert. Dabei zeigt:
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1 ein Signalflussdiagramm zur Verdeutlichung des erfindungsgemäßen Verfahrens.
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1 a signal flow diagram to illustrate the method according to the invention.
Das erfindungsgemäße Verfahren zur Bestimmung der Übertragungsreserve eines reibschlüssigen Schaltelements eines Getriebes wird nachfolgend unter Bezugnahme auf das Signalflussdiagramm der
In einem ersten Schritt
In einem Schritt
In Schritt
In einem Schritt
In einem Schritt
Wird hingegen in Schritt
In Schritt
Dieses in Schritt
Nachfolgend kann in einem Schritt
Die Erfindung betrifft weiterhin ein Steuergerät eines Getriebes, welches eingerichtet ist, das oben beschriebene Verfahren steuerungsseitig auszuführen.The invention further relates to a control unit of a transmission which is set up to carry out the method described above on the control side.
So ist das Steuergerät eingerichtet, eine Anpresskraft des reibschlüssigen Schaltelements für mehrere Positionen des Schaltelements zu ermitteln. Weiterhin ist das Steuergerät eingerichtet, ein von dem reibschlüssigen Schaltelement übertragenes Moment für eine Teilmenge der mehreren Positionen des Schaltelements zu ermitteln. Ferner ist das Steuergerät eingerichtet, einen Quotienten aus der Anpresskraft des reibschlüssigen Schaltelements und dem von dem reibschlüssigen Schaltelement übertragenen Moment für mindestens eine Position des Schaltelements zu berechnen, für welche die Anpresskraft und das übertragene Moment vorliegen. Ferner ist das Steuergerät eingerichtet, ein von dem reibschlüssigen Schaltelement maximal übertragbares Moment zu berechnen, und zwar abhängig vom berechneten Quotienten und der Anpresskraft im Zupunkt der reibschlüssigen Kupplung.The control device is set up to determine a contact pressure of the frictional shifting element for several positions of the shifting element. Furthermore, the control device is set up to determine a torque transmitted by the frictional shifting element for a subset of the multiple positions of the shifting element. Furthermore, the control device is set up to calculate a quotient from the contact pressure of the frictional shift element and the torque transmitted by the frictional shift element for at least one position of the shift element for which the contact force and the transmitted torque are present. Furthermore, the control device is set up to calculate a maximum torque that can be transmitted by the frictional shifting element, specifically as a function of the calculated quotient and the contact pressure at the point of the frictional clutch.
Das Steuergerät bestimmt die Übertragungsreserve durch Berechnung eines Verhältnisses aus dem maximal vom reibschlüssigen Schaltelement übertragbaren Moment und einem maximalen Antriebsaggregatmoment eines mit dem Getriebe gekoppelten Antriebsaggregats.The control unit determines the transmission reserve by calculating a ratio of the maximum torque that can be transmitted by the frictional shifting element and a maximum drive assembly torque of a drive assembly coupled to the transmission.
Das Steuergerät verfügt über Mittel, die der Ausführung des erfindungsgemäßen Verfahrens dienen, nämlich über hardwareseitige Mittel und softwareseitige Mittel. Zu den hardwareseitigen Mitteln zählen Datenschnittstellen zum Datenaustausch mit an der Ausführung des Verfahrens beteiligten Baugruppen, ein Prozessor zur Datenverarbeitung und ein Speicher zur Datenspeicherung. Zu den softwareseitigen Mitteln zählen Programmbausteine zur Durchführung des erfindungsgemäßen Verfahrens.The control device has means which are used to carry out the method according to the invention, namely means on the hardware side and means on the software side. The hardware means include data interfaces for data exchange with assemblies involved in the execution of the method, a processor for data processing and a memory for data storage. The software-based means include program modules for carrying out the method according to the invention.
Die Erfindung erlaubt eine einfache und genau Bestimmung der Übertragungsreserve eines reibschlüssigen Schaltelements eines Getriebes.The invention allows a simple and precise determination of the transmission reserve of a frictional shifting element of a transmission.
BezugszeichenlisteList of reference symbols
- 1010
- Ermittlung AnpresskraftDetermination of contact force
- 1111
- Ermittlung übertragenes MomentDetermination of transmitted moment
- 1212th
- Berechnung QuotientCalculation of quotient
- 1313th
- Abfrage mehrere QuotientenQuery several quotients
- 1414th
- Berechnung MittelwertCalculation of mean value
- 1515th
- Berechnung maximal übertragbares MomentCalculation of the maximum transferable moment
- 1616
- Ermittlung maximales AntriebsaggregatmomentDetermination of the maximum drive unit torque
- 1717th
- Bestimmung ÜbertragungsreserveDetermination of transfer reserve
- 1818th
- Vergleich GrenzwertComparison of limit value
- 1919th
- Ermittlung WartungsintervallDetermination of the maintenance interval
- 2020th
- Generierung WarnmeldungGeneration of warning message
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
- DE 102007027702 A1 [0003]DE 102007027702 A1 [0003]
- DE 102015218884 A1 [0004, 0017]DE 102015218884 A1 [0004, 0017]
- DE 102015218994 A1 [0005, 0018]DE 102015218994 A1 [0005, 0018]
Claims (7)
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DE102019215434.4A DE102019215434A1 (en) | 2019-10-09 | 2019-10-09 | Method and control device for determining a transmission reserve of a frictional shifting element of a transmission |
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DE102019215434.4A DE102019215434A1 (en) | 2019-10-09 | 2019-10-09 | Method and control device for determining a transmission reserve of a frictional shifting element of a transmission |
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DE102019215434A1 true DE102019215434A1 (en) | 2021-04-15 |
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DE102019215434.4A Pending DE102019215434A1 (en) | 2019-10-09 | 2019-10-09 | Method and control device for determining a transmission reserve of a frictional shifting element of a transmission |
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102007027702A1 (en) * | 2007-06-15 | 2008-12-18 | Zf Friedrichshafen Ag | Method and device for controlling a clutch |
EP2184507A1 (en) * | 2008-11-05 | 2010-05-12 | Zf Friedrichshafen Ag | Method and device for determining the wear state of a switch coupling |
DE102016116324A1 (en) * | 2015-09-10 | 2017-03-16 | Ford Global Technologies, Llc | Clutch control using dither |
DE102015218884A1 (en) * | 2015-09-30 | 2017-03-30 | Zf Friedrichshafen Ag | Method for determining at least one parameter of a separating clutch |
DE102015218994A1 (en) * | 2015-10-01 | 2017-04-06 | Zf Friedrichshafen Ag | Method for determining a contact point of a separating clutch |
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2019
- 2019-10-09 DE DE102019215434.4A patent/DE102019215434A1/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102007027702A1 (en) * | 2007-06-15 | 2008-12-18 | Zf Friedrichshafen Ag | Method and device for controlling a clutch |
EP2184507A1 (en) * | 2008-11-05 | 2010-05-12 | Zf Friedrichshafen Ag | Method and device for determining the wear state of a switch coupling |
DE102016116324A1 (en) * | 2015-09-10 | 2017-03-16 | Ford Global Technologies, Llc | Clutch control using dither |
DE102015218884A1 (en) * | 2015-09-30 | 2017-03-30 | Zf Friedrichshafen Ag | Method for determining at least one parameter of a separating clutch |
DE102015218994A1 (en) * | 2015-10-01 | 2017-04-06 | Zf Friedrichshafen Ag | Method for determining a contact point of a separating clutch |
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