WO2007045402A2 - Method for the determination of service intervals in transmissions - Google Patents

Method for the determination of service intervals in transmissions Download PDF

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Publication number
WO2007045402A2
WO2007045402A2 PCT/EP2006/009906 EP2006009906W WO2007045402A2 WO 2007045402 A2 WO2007045402 A2 WO 2007045402A2 EP 2006009906 W EP2006009906 W EP 2006009906W WO 2007045402 A2 WO2007045402 A2 WO 2007045402A2
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WO
WIPO (PCT)
Prior art keywords
lubricant
values
stored
determined
service intervals
Prior art date
Application number
PCT/EP2006/009906
Other languages
German (de)
French (fr)
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WO2007045402A3 (en
Inventor
Stefan Prebeck
Markus Kronberger
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 WO2007045402A2 publication Critical patent/WO2007045402A2/en
Publication of WO2007045402A3 publication Critical patent/WO2007045402A3/en

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Classifications

    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C5/00—Registering or indicating the working of vehicles
    • G07C5/006—Indicating maintenance
    • 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
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0405—Monitoring quality of lubricant or hydraulic fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/10—Indicating devices; Other safety devices
    • F01M2011/14—Indicating devices; Other safety devices for indicating the necessity to change the oil
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/10—Indicating devices; Other safety devices
    • F01M2011/14—Indicating devices; Other safety devices for indicating the necessity to change the oil
    • F01M2011/1473—Indicating devices; Other safety devices for indicating the necessity to change the oil by considering temperature

Definitions

  • the invention relates to a method for determining service intervals in transmissions according to the closer defined in the preamble of claim 1.
  • DE 103 21 529 A1 discloses a method for determining service intervals in transmissions, in which characteristic values supplied by the internal combustion engine of the vehicle and by other components of the vehicle via the CAN interface are stored in the control unit of the transmission in order to evaluate them.
  • the values for the input torque and the input speed are stored and evaluated, taking into account efficiency maps of the transmission and the loss factors of the PTOs during the evaluation.
  • the evaluation is carried out in the form of a normalized diagram, which allows conclusions to be drawn on the duration of use as well as the application hardness of the vehicle. Here the number of load cycles is counted and added up. However, this leads to inaccurate statements about the condition of the lubricant.
  • the present invention has for its object to provide a method for determining service intervals in transmissions, in which the service interval can be determined exactly.
  • the state variables are determined during operation via sensors and stored in a memory device.
  • the oil temperature of the transmission is measured and in the storage device the Temperatures are stored in certain classes, whereby a temperature classification takes place.
  • the temperature in the transmission is measured at regular intervals and entered into a classification table. These values are evaluated according to the aging behavior of the lubricant as a function of the temperature and used for the indication of a necessary lubricant change.
  • the friction power is additionally determined at regular intervals and recorded in a classification table.
  • the friction power is preferably determined by the speed difference of the shaft driving the multi-plate clutch to the multi-disc clutch and the torque to be transmitted, which can be determined on the basis of a load detection. It is also possible to additionally consider the actuation times of the multi-plate clutches or brakes and / or the closing times. The values thus determined, which are entered in classes, are evaluated in accordance with the aging behavior of the lubricant as a function of the temperature and thus additionally taken into account for the indication of a necessary lubricant change.
  • the power which is transmitted from the transmission is additionally determined as a further criterion at regular intervals and recorded in a classification table.
  • the values determined are stored in classification tables, whereby the stored, classified values are compared with still permissible, stored values or lubricants and, if they are exceeded, a signal for changing the lubricant is output.
  • the contamination of the lubricant filter which is present for cleaning the lubricant in the transmission, also used to determine the lubricant change.
  • the measured values obtained are evaluated cumulatively and from this conclusions about the degree of soiling of the filter and from this about the usability of the lubricant are drawn.
  • the comparison of this data with previously empirically determined data additionally allows the indication of a necessary lubricant change.
  • the method of the temperature classification, the filter occupancy, the determination of the friction power and the determination of the transmitted load is considered as a whole and with previously empirically determined values and, depending on the composition of the individual values, a signal to change the lubricant output.
  • the signal for lubricant change can be made visually or acoustically, but it is also possible to output a progress bar on the current state of the lubricant.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • General Details Of Gearings (AREA)

Abstract

The invention relates to a method for determining service intervals. According to said method, temperatures in the transmission are measured at regular intervals and are entered in classification tables, whereupon said values are compared according to the aging behavior of the lubricant in accordance with the temperature, and an acoustic or visual signal indicating that the lubricant is to be changed is output when admissible values are exceeded.

Description

Verfahren zur Ermittlung von Service-Intervallen in Getrieben Method for determining service intervals in gearboxes
Die Erfindung betrifft ein Verfahren zur Ermittlung von Service- Intervallen in Getrieben nach der im Oberbegriff von Anspruch 1 näher definierten Art.The invention relates to a method for determining service intervals in transmissions according to the closer defined in the preamble of claim 1.
Die DE 103 21 529 A1 offenbart ein Verfahren zur Ermittlung von Service-Intervallen in Getrieben, bei welchem von dem Verbrennungsmotor des Fahrzeugs und von weiteren Komponenten des Fahrzeugs über die CAN- Schnittstelle gelieferte Kennwerte im Steuergerät des Getriebes gespeichert werden, um diese auszuwerten. Die Werte für das Eingangsdrehmoment und die Eingangsdrehzahl werden gespeichert und ausgewertet, wobei bei der Auswertung Wirkungsgrad-Kennfelder des Getriebes sowie die Verlustfaktoren der Nebenabtriebe berücksichtigt werden. Die Auswertung erfolgt in Form eines normierten Diagramms, welches Rückschlüsse auf die Einsatzdauer sowie Einsatzhärte des Fahrzeugs ermöglicht. Hierbei wird die Anzahl von Lastspielen gezählt und aufsummiert. Dies führt jedoch zu ungenauen Aussagen über den Zustand des Schmiermittels.DE 103 21 529 A1 discloses a method for determining service intervals in transmissions, in which characteristic values supplied by the internal combustion engine of the vehicle and by other components of the vehicle via the CAN interface are stored in the control unit of the transmission in order to evaluate them. The values for the input torque and the input speed are stored and evaluated, taking into account efficiency maps of the transmission and the loss factors of the PTOs during the evaluation. The evaluation is carried out in the form of a normalized diagram, which allows conclusions to be drawn on the duration of use as well as the application hardness of the vehicle. Here the number of load cycles is counted and added up. However, this leads to inaccurate statements about the condition of the lubricant.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein Verfahren zur Ermittlung von Service-Intervallen in Getrieben zu schaffen, bei weichem das Service-Intervall exakt bestimmt werden kann.The present invention has for its object to provide a method for determining service intervals in transmissions, in which the service interval can be determined exactly.
Die Aufgabe wird mit einem, auch die kennzeichnenden Merkmale des Hauptanspruchs aufweisenden, gattungsgemäßen Verfahren gelöst.The object is achieved with a, the characterizing features of the main claim having, generic method.
Erfindungsgemäß werden die Zustandsgrößen während des Betriebs über Sensoren ermittelt und in einer Speichereinrichtung abgelegt. Hierbei wird die Öltemperatur des Getriebes gemessen und in der Speichereinrichtung die Temperaturen in bestimmten Klassen abgelegt, wodurch eine Temperatur- Klassifizierung stattfindet.According to the invention, the state variables are determined during operation via sensors and stored in a memory device. Here, the oil temperature of the transmission is measured and in the storage device the Temperatures are stored in certain classes, whereby a temperature classification takes place.
In einer bevorzugten Ausführungsform wird in regelmäßigen Abständen die Temperatur im Getriebe gemessen und in eine Klassifizierungs-Tabelle eingetragen. Diese Werte werden entsprechend dem Alterungsverhalten des Schmiermittels in Abhängigkeit von der Temperatur ausgewertet und für die Indikation eines notwendigen Schmiermittelwechsels herangezogen.In a preferred embodiment, the temperature in the transmission is measured at regular intervals and entered into a classification table. These values are evaluated according to the aging behavior of the lubricant as a function of the temperature and used for the indication of a necessary lubricant change.
Um die erhöhte thermische Belastung des Schmiermittels im örtlichen Bereich der im Getriebe vorhandenen Lamellenkupplungen mitzuberücksichti- gen, wird in einer weiteren Ausführungsform der Erfindung zusätzlich die Reibleistung in regelmäßigen Abständen ermittelt und in eine Klassifizierungs- Tabelle eingetragen. Die Reibleistung wird vorzugsweise durch den Drehzahlunterschied der die Lamellenkupplung antreibenden Welle zur Lamellenkupplung abtreibenden Welle und dem zu übertragenden Drehmoment, welches aufgrund einer Lasterkennung ermittelt werden kann, bestimmt. Es besteht auch die Möglichkeit, die Betätigungszeiten der Lamellenkupplungen bzw. Bremsen und/oder die Schließzeiten zusätzlich zu berücksichtigen. Die dadurch ermittelten Werte, welche in Klassen eingetragen werden, werden entsprechend dem Alterungsverhalten des Schmiermittels in Abhängigkeit von der Temperatur ausgewertet und somit zusätzlich für die Indikation eines notwendigen Schmiermittelwechsels berücksichtigt.To take account of the increased thermal load of the lubricant in the local area of the multi-plate clutches present in the transmission, in a further embodiment of the invention, the friction power is additionally determined at regular intervals and recorded in a classification table. The friction power is preferably determined by the speed difference of the shaft driving the multi-plate clutch to the multi-disc clutch and the torque to be transmitted, which can be determined on the basis of a load detection. It is also possible to additionally consider the actuation times of the multi-plate clutches or brakes and / or the closing times. The values thus determined, which are entered in classes, are evaluated in accordance with the aging behavior of the lubricant as a function of the temperature and thus additionally taken into account for the indication of a necessary lubricant change.
In einer weiteren Ausgestaltungsform der Erfindung wird zusätzlich als weiteres Kriterium in regelmäßigen Abständen die Leistung, welche vom Getriebe übertragen wird, ermittelt und in eine Klassifizierungs-Tabelle eingetragen. Die empirisch bestimmten Abhängigkeiten zwischen dem hydraulischen Druck in den Hydrostaten eines hydrostatisch-mechanischen Leistungsver- zweigungsgetriebes und die daraus resultierende Belastung der Verzahnungen des Getriebes und die aus diesen bestimmten Alterungsfaktoren des Schmier- mittels werden ebenfalls als Indikation für einen notwendigen Schmiermittelwechsel berücksichtigt.In a further embodiment of the invention, the power which is transmitted from the transmission is additionally determined as a further criterion at regular intervals and recorded in a classification table. The empirically determined dependencies between the hydraulic pressure in the hydrostats of a hydrostatic-mechanical power transfer gear and the resulting load on the gears of the gearbox and the lubrication factors determined therefrom. means are also considered as an indication for a necessary change of lubricant.
Bei Verwendung von Klauenkupplungen wird aus der Anzahl der Schließvorgänge der Kupplungen und/oder ihrer Schließzeiten durch eine Klassifizierung derselben der Zustand des Schmiermittels ermittelt. Hierbei werden die ermittelten Werte in Klassifizierungs-Tabellen abgelegt, wobei die abgelegten, klassifizierten Werte mit noch zulässigen, abgelegten Werten oder Schmiermitteln verglichen werden und bei Überschreiten ein Signal zum Schmiermittelwechsel ausgegeben wird.When using dog clutches of the number of closing operations of the clutches and / or their closing times by a classification of the same condition of the lubricant is determined. In this case, the values determined are stored in classification tables, whereby the stored, classified values are compared with still permissible, stored values or lubricants and, if they are exceeded, a signal for changing the lubricant is output.
In einer weiteren Ausgestaltungsform der Erfindung wird die Verschmutzung des Schmiermittelfilters, welcher zum Reinigen des Schmiermittels im Getriebe vorhanden ist, ebenfalls zur Bestimmung des Schmiermittelwechsels herangezogen. Hierbei wird ermittelt, ob die Filterumgehung sich im geschlossenen oder offenen Zustand befindet bzw. bei welcher Temperatur und welchem Volumenstrom die Filterumgehung vom geschlossenen Zustand in den offenen Zustand übergeht. Dies kann vorzugsweise mittels eines Kontaktschalters detektiert werden. Die errmittelten Meßwerte werden kumulativ ausgewertet und daraus Rückschlüsse über den Verschmutzungsgrad des Filters und hieraus über die Verwendbarkeit des Schmiermittels gezogen. Der Vergleich dieser Daten mit zuvor empirisch ermittelten Daten ermöglicht die Indikation eines notwendigen Schmiermittelwechsels zusätzllich.In a further embodiment of the invention, the contamination of the lubricant filter, which is present for cleaning the lubricant in the transmission, also used to determine the lubricant change. In this case, it is determined whether the filter bypass is in the closed or open state or at which temperature and which volume flow the filter bypass passes from the closed state to the open state. This can preferably be detected by means of a contact switch. The measured values obtained are evaluated cumulatively and from this conclusions about the degree of soiling of the filter and from this about the usability of the lubricant are drawn. The comparison of this data with previously empirically determined data additionally allows the indication of a necessary lubricant change.
In einer weiteren Ausführungsform der Erfindung wird das Verfahren der Temperatur-Klassifizierung, der Filterbelegung, der Ermittlung der Reibleistung sowie der Ermittlung der übertragenen Last gesamthaft betrachtet und mit zuvor empirisch ermittelten Werten verglichen und, je nach Zusammensetzung der einzelnen Werte, ein Signal zum Schmiermittelwechsel ausgegeben. Das Signal zum Schmiermittelwechsel kann optisch oder akustisch erfolgen, es besteht jedoch auch die Möglichkeit, eine Fortschrittsanzeige über den aktuellen Zustand des Schmiermittels auszugeben. In a further embodiment of the invention, the method of the temperature classification, the filter occupancy, the determination of the friction power and the determination of the transmitted load is considered as a whole and with previously empirically determined values and, depending on the composition of the individual values, a signal to change the lubricant output. The signal for lubricant change can be made visually or acoustically, but it is also possible to output a progress bar on the current state of the lubricant.

Claims

Patentansprüche claims
1. Verfahren zur Ermittlung von Service-Intervallen in Getrieben, wobei während des Betriebs Zustandsgrößen, wie Temperatur und Drehzahlen, ermittelt werden, dadurch gekennzeichnet, dass die ermittelten Zustandsgrößen in einer Speichereinrichtung abgelegt werden und ein elektronischer Rechner die abgelegten Zustandsgrößen mit zulässigen Zustandsgrößen vergleicht und bei Überschreiten der zulässigen Zustandsgrößen durch die abgelegten Zustandsgrößen ein visuelles oder akustisches Signal ausgibt.1. A method for determining service intervals in transmissions, wherein state variables, such as temperature and speeds, are determined during operation, characterized in that the determined state variables are stored in a memory device and an electronic computer compares the stored state variables with allowable state variables and when the permissible state variables are exceeded, a visual or acoustic signal is emitted by the stored state variables.
2. Verfahren zur Ermittlung von Service-Intervallen nach Anspruch 1 , dadurch gekennzeichnet, dass eine Meßeinrichtung bei einem Filter zur Filterung des Schmiermittels ermittelt, ob eine bei einem definierten Druck öffnende Filterumgehung geöffnet oder geschlossen ist und hierbei gleichzeitig die Temperatur und der Volumenstrom des Schmiermittels ermittelt, wobei eine Recheneinheit die ermittelten Werte kumulativ auswertet und in Abhängigkeit dieser Werte ein visuelles oder akustisches Signal zum Schmiermittelwechsel ausgegeben wird.2. A method for determining service intervals according to claim 1, characterized in that a measuring device determines in a filter for filtering the lubricant, whether a opening at a defined pressure filter bypass is open or closed, and this simultaneously the temperature and the flow rate of the lubricant determined, wherein a computing unit evaluates the determined values cumulatively and depending on these values, a visual or audible signal is output to the lubricant change.
3. Verfahren zur Ermittlung von Service-Intervallen nach Anspruch 1 , dadurch gekennzeichnet, dass in zuvor definierten Abständen die Schmiermitteltemperatur des Getriebes ermittelt und diese Temperatur in Klassifizierungs-Tabellen abgelegt wird, wobei die abgelegten, klassifizierten Werte mit noch zulässig abgelegten Werten des Schmiermittels verglichen werden und bei Überschreiten ein Signal zum Schmiermittelwechsel ausgegen wird.3. Method for determining service intervals according to claim 1, characterized in that the lubricant temperature of the transmission is determined at predefined intervals and this temperature is stored in classification tables, the stored, classified values being compared with values of the lubricant that are still permissible be exceeded and a signal to change the lubricant is exceeded.
4. Verfahren zur Ermittlung von Service-Intervallen nach Anspruch 1 , dadurch gekennzeichnet, dass aus dem Drehzahlunterschied von zu schaltenden Kupplungen des Getriebes und dem Drehmoment eine Reibleistung ermittelt wird, welche in Klassifizierungs-Tabellen abgelegt wird, wobei die abgelegten, klassifizierten Werte mit noch zulässigen, abgelegten Werten des Schmiermittels verglichen werden und bei Überschreiten ein Signal zum Schmiermittelwechsel ausgegeben wird.4. A method for determining service intervals according to claim 1, characterized in that from the speed difference to be switched clutches of the transmission and the torque, a friction loss is determined, which is stored in classification tables, wherein the stored, classified values are compared with the still permitted, stored values of the lubricant and a signal for changing the lubricant is output when this is exceeded.
5. Verfahren zur Ermittlung von Service-Intervallen nach Anspruch 1 , dadurch gekennzeichnet, dass bei einem hydrostatisch-mechanischen Leistungsverzweigungsgetriebe der Druck im Hydrostaten ermittelt und in Klassifizierungs-Tabellen abgelegt wird, wobei die abgelegten, klassifizierten Werte mit noch zulässigen, abgelegten Werten des Schmiermittels verglichen werden und bei Überschreiten ein Signal zum Schmiermittelwechsel ausgegeben wird.5. A method for determining service intervals according to claim 1, characterized in that determined in a hydrostatic-mechanical power split transmission, the pressure in the hydrostatic and stored in classification tables, the stored, classified values with still allowable, stored values of the lubricant be compared and a signal for changing the lubricant is output when exceeding.
6. Verfahren zur Ermittlung von Service-Intervallen nach Anspruch 1 , dadurch gekennzeichnet, dass die ermittelten Werte aus der Temperatur der Reibleistung, dem übertragenen Drehmoment und der Filterumgehung jeweils mit zuvor empirisch ermittelten Werten verglichen werden, und, je nach Zusammensetzung der einzelnen Werte, ein Signal zum Schmiermittelwechsel ausgegeben wird. 6. Method for determining service intervals according to claim 1, characterized in that the determined values from the temperature of the friction power, the transmitted torque and the filter bypass are each compared with previously empirically determined values, and, depending on the composition of the individual values, a signal for lubricant change is output.
PCT/EP2006/009906 2005-10-19 2006-10-13 Method for the determination of service intervals in transmissions WO2007045402A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005050006.4 2005-10-19
DE200510050006 DE102005050006A1 (en) 2005-10-19 2005-10-19 Method for determining service intervals in gearboxes

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WO2007045402A2 true WO2007045402A2 (en) 2007-04-26
WO2007045402A3 WO2007045402A3 (en) 2007-07-19

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DE102008041639A1 (en) * 2008-08-28 2010-03-04 Zf Friedrichshafen Ag Detecting a wear condition of an operating medium and defining a change interval
DE102016125893A1 (en) * 2016-12-29 2018-07-05 Getrag Getriebe- Und Zahnradfabrik Hermann Hagenmeyer Gmbh & Cie Kg Method and control unit for determining a state of a tribological system of a motor vehicle transmission
FR3067434B1 (en) * 2017-06-09 2020-01-03 Poclain Hydraulics Industrie STEERING A HYDRAULIC TRANSMISSION AS A FUNCTION OF THE AGING OF THE TRANSMISSION FLUID
FR3067433B1 (en) * 2017-06-09 2020-01-03 Poclain Hydraulics Industrie PERSONALIZED MAINTENANCE SYSTEM FOR A HYDRAULIC VEHICLE SYSTEM
DE102019202423A1 (en) * 2019-02-22 2020-08-27 Zf Friedrichshafen Ag Method for determining a point in time for a change in an operating medium of a vehicle transmission
WO2024061479A1 (en) 2022-09-20 2024-03-28 Sew-Eurodrive Gmbh & Co. Kg Gearing having a housing part

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WO2007045402A3 (en) 2007-07-19

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