DE102017123081A1 - Method for correctly determining a friction energy generated in a clutch during a slip operation of a vehicle - Google Patents
Method for correctly determining a friction energy generated in a clutch during a slip operation of a vehicle Download PDFInfo
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- DE102017123081A1 DE102017123081A1 DE102017123081.5A DE102017123081A DE102017123081A1 DE 102017123081 A1 DE102017123081 A1 DE 102017123081A1 DE 102017123081 A DE102017123081 A DE 102017123081A DE 102017123081 A1 DE102017123081 A1 DE 102017123081A1
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- vehicle
- clutch
- friction
- determined
- slip
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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
-
- 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
- F16D2500/10406—Clutch position
- F16D2500/10412—Transmission line of a vehicle
-
- 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
- F16D2500/30406—Clutch slip
-
- 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
- F16D2500/30408—Relative rotational position of the input and output parts, e.g. for facilitating positive clutch engagement
-
- 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
- F16D2500/30415—Speed 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
- F16D2500/30426—Speed 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
- F16D2500/306—Signal inputs from the engine
- F16D2500/3065—Torque of the engine
-
- 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
- F16D2500/306—Signal inputs from the engine
- F16D2500/3067—Speed of the engine
-
- 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
- F16D2500/308—Signal inputs from the transmission
- F16D2500/30806—Engaged transmission ratio
-
- 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
- F16D2500/308—Signal inputs from the transmission
- F16D2500/3081—Signal inputs from the transmission from the input shaft
- F16D2500/30816—Speed of the input shaft
-
- 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
- F16D2500/31—Signal inputs from the vehicle
- F16D2500/3114—Vehicle wheels
- F16D2500/3115—Vehicle wheel speed
-
- 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
- F16D2500/502—Relating the clutch
- F16D2500/50206—Creep control
-
- 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
- F16D2500/502—Relating the clutch
- F16D2500/5023—Determination of the clutch wear
-
- 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
- F16D2500/502—Relating the clutch
- F16D2500/50296—Limit clutch wear
-
- 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
- F16D2500/5106—Overheat protection
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
Abstract
Die Erfindung betrifft ein Verfahren zur Bestimmung einer in einer Kupplung entstehenden Reibenergie während eines Schlupfvorganges eines Fahrzeuges, wobei eine Reibleistung während des Schlupfes im Fahrzeug bestimmt wird. Bei einem Verfahren, bei welchem eine Reibenergie ohne vorhandene Sensorik bestimmt werden kann, wird während des Schlupfvorganges des Fahrzeuges eine Teilreibenergie berechnet, mit welcher nach Beendigung eines Reibenergieeintrages in die Kupplung die tatsächlich eingetretene Reibenergie mit Hilfe eines berechneten Ganges ermittelt wird.The invention relates to a method for determining a frictional energy generated in a clutch during a slip operation of a vehicle, wherein a frictional power during slippage in the vehicle is determined. In a method in which a friction energy can be determined without existing sensors, during the slip process of the vehicle, a partial drive energy is calculated, with which after completion of a Reibenergieeintrages in the clutch actually occurring friction energy is determined using a calculated gear.
Description
Die Erfindung betrifft ein Verfahren zur Bestimmung einer in einer Kupplung entstehenden Reibenergie während eines Schlupfvorganges eines Fahrzeuges, wobei eine Reibleistung während des Schlupfes im Fahrzeug bestimmt wird.The invention relates to a method for determining a frictional energy generated in a clutch during a slip operation of a vehicle, wherein a frictional power during slippage in the vehicle is determined.
Aus der
Insbesondere bei Schaltgetrieben, die keinen Gangsensor und keinen Getriebedrehzahlsensor aufweisen, ist es schwierig, die Reibenergie zu bestimmen.Especially in manual transmissions that have no gear sensor and no transmission speed sensor, it is difficult to determine the friction energy.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zur korrekten Bestimmung einer in einer Kupplung entstehenden Reibenergie anzugeben, bei welchem die Reibenergie während eines Schlupfvorganges ohne Kenntnis eines eingelegten Ganges bestimmt wird.The invention has for its object to provide a method for the correct determination of a friction energy generated in a clutch, in which the friction energy during a slip process without knowledge of an engaged gear is determined.
Erfindungsgemäß ist die Aufgabe dadurch gelöst, dass während des Schlupfvorganges des Fahrzeuges eine Teilreibenergie berechnet wird, mit welcher nach Beendigung eines Reibleistungseintrages in die Kupplung die tatsächlich eingetretene Reibenergie mit Hilfe eines berechneten Ganges ermittelt wird. Dabei wird die Tatsache genutzt, dass die Reibleistung während des Schlupfes aus dem Produkt des Kupplungsmomentes und des Schlupfes ermittelt wird, der eine Drehzahldifferenz der Motorwelle und der Getriebeeingangswelle darstellt. Da im Fahrzeug Raddrehzahlsensoren und Motordrehzahlsensoren vorhanden sind, kann aus diesen Größen zuverlässig die Reibenergie bestimmt werden, ohne dass zusätzlich ein Getriebedrehzahlsensor und/oder ein Gangsensor notwendig sind. Durch diese Korrektur lässt sich einfach auf eine korrekte Reibenergie während des Schlupfes, vorzugsweise eines Schaltvorganges, schließen. Dass Verfahren ist weiterhin unabhängig von der Synchronisation zwischen Motordrehzahl und Getriebedrehzahl anwendbar.According to the invention the object is achieved in that during the slip process of the vehicle a Teilreibenergie is calculated, which is determined after completion of a friction power input into the clutch actually occurring friction energy using a calculated gear. In this case, the fact is used that the friction during slippage is determined from the product of the clutch torque and the slip, which represents a speed difference of the motor shaft and the transmission input shaft. Since wheel speed sensors and engine speed sensors are present in the vehicle, the friction energy can be reliably determined from these variables without additionally requiring a transmission speed sensor and / or a gear sensor. This correction makes it easy to conclude on a correct friction energy during slippage, preferably a switching operation. The method is still applicable regardless of the synchronization between engine speed and transmission speed.
Vorteilhafterweise wird der Gang nach einer Synchronisation von Motordrehzahl und Getriebedrehzahl über einen Vergleich von Motordrehzahl und Raddrehzahl berechnet. Dies ist möglich, da davon ausgegangen werden kann, dass nach einer Schaltung die Kupplung voll eingerückt ist.Advantageously, the gear is calculated after a synchronization of engine speed and transmission speed via a comparison of engine speed and wheel speed. This is possible because it can be assumed that after a shift, the clutch is fully engaged.
In einer Ausgestaltung wird aus Verrechnung der Raddrehzahl des Fahrzeuges mit einer Achsübersetzung und einer Getriebeübersetzung die Getriebedrehzahl zur Bestimmung der tatsächlich eingetretenen Reibenergie ermittelt. Im synchronisierten Zustand entspricht die Getriebedrehzahl immer der Motordrehzahl.In one embodiment, the transmission speed for determining the actually occurred friction energy is determined from the calculation of the wheel speed of the vehicle with an axle ratio and a gear ratio. In the synchronized state, the transmission speed always corresponds to the engine speed.
In einer Variante wird bei einer abgebrochenen Synchronisation zwischen Motordrehzahl und Getriebedrehzahl bei Absinken eines Kupplungsmomentes auf null der Gang für die Berechnung der tatsächlich eingetretenen Reibenergie herangezogen, welcher aktuell den geringsten Schlupf zur Folge hat. Somit kann die Reibenergie auch bei solchen Schlupfvorgängen zuverlässig berechnet werden, wo der Reibenergieeintrag nicht mit einer Synchronisation endet.In a variant, with a broken synchronization between engine speed and transmission speed when a clutch torque drops to zero, the gear is used for the calculation of the actually occurring friction energy, which currently results in the lowest slip. Thus, the rubbing energy can be reliably calculated even in such slip operations where the friction energy input does not end in synchronization.
In einer Ausführungsform wird die Beendigung des Reibenergieeintrages anhand eines Kupplungsmomentabfalls bestimmt. Da das Kupplungsmoment für Steuer- und Regelvorgänge an sich laufend im Fahrzeug berechnet wird, muss es lediglich für den vorliegenden Anwendungsfall ausgewertet werden, wodurch der Rechenaufwand reduziert wird.In one embodiment, the completion of the friction energy input is determined based on a clutch torque drop. Since the clutch torque for control and regulation processes per se is calculated continuously in the vehicle, it only has to be evaluated for the present application, whereby the computational effort is reduced.
In einer Weiterbildung wird der Kupplungsmomentabfall anhand eines Kupplungsmomentengradienten bestimmt. Dadurch kann in kürzester Zeit darauf geschlossen werden, ob ein Abfall des Energieeintrages vorliegt.In a development of the clutch torque drop is determined based on a Kupplungsmomentengradienten. As a result, it can be concluded in a very short time whether there is a drop in the energy input.
In einer Ausführungsform wird ein Warnsignal ausgegeben, wenn die ermittelte Reibenergie einen Schwellwert überschreitet. Durch Überschreitung des Schwellwertes wird ein Verschleiß der Kupplung angezeigt, woraus Maßnahmen zum Auswechseln der Reibbeläge realisiert werden können.In one embodiment, a warning signal is issued when the determined friction energy exceeds a threshold. Exceeding the threshold value indicates wear of the coupling, which means that measures can be taken to replace the friction linings.
In einer weiteren Variante wird bei Überschreitung des Schwellwertes eine Fehlerinformation abgespeichert und das Warnsignal wird nach Auftreten einer vorgegebenen Anzahl von Fehlerinformationen ausgegeben. Damit wird sichergestellt, dass auch tatsächlich ein Verschleiß an der Kupplung vorliegt und nicht ein zufällig hervorgerufenes Fehlerereignis zum fehlerhaften Anzeigen des Kupplungsverschleißes führt.In a further variant, an error information is stored when the threshold value is exceeded, and the warning signal is emitted after the occurrence of a predetermined number of error information output. This ensures that there is actually wear on the clutch and not a randomly caused fault event leads to incorrect indication of clutch wear.
Die Erfindung lässt zahlreiche Ausführungsformen zu. Zwei davon sollen anhand der in der Zeichnung dargestellten Figuren erläutert werden.The invention allows numerous embodiments. Two of these will be explained with reference to the figures shown in the drawing.
Es zeigen:
-
1 eine Prinzipdarstellung eines Antriebsstrangs eines Fahrzeuges, -
2 Ausführungsbeispiele des erfindungsgemäßen Verfahrens.
-
1 a schematic diagram of a drive train of a vehicle, -
2 Embodiments of the method according to the invention.
Da bei dem beschriebenen Antriebsstrang
Der Schlupf
Diese Reibleistung wird während des Schaltvorganges des Fahrzeuges in einem Zeitraum von
Die Reibenergie wird somit aus zwei Termen, einem Energieanteil des Motors
Da aber kein Getriebedrehzahlsensor vorhanden ist, muss der Energieanteil des Schaltgetriebes durch die Raddrehzahl
Solange ein Kupplungsmoment
Der Gang
In der Regel wird die Kupplung
Durch eine Verrechnung der Raddrehzahl
Es ist allerdings auch möglich, dass Reibenergieeinträge während Schalt- und anderen Schlupfvorgängen nicht mit einer Synchronisation enden. Sinkt das Kupplungsmoment
In
Beim Ende
Die so berechnete Reibenergie
Bezugszeichenliste LIST OF REFERENCE NUMBERS
- 11
- Antriebsstrangpowertrain
- 22
- Verbrennungsmotorinternal combustion engine
- 33
- Kupplungclutch
- 44
- Schaltgetriebemanual transmission
- 55
- Abtriebswelleoutput shaft
- 66
- Antriebsraddrive wheel
- 77
- Kupplungssteuerungclutch control
- 88th
- MotordrehzahlsensorEngine speed sensor
- 99
- Kurbelwellecrankshaft
- 1010
- Raddrehzahlsensorwheel speed sensor
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE 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 has been 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 PatentliteraturCited patent literature
- DE 102005061080 A1 [0002]DE 102005061080 A1 [0002]
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE102017123081.5A DE102017123081A1 (en) | 2017-10-05 | 2017-10-05 | Method for correctly determining a friction energy generated in a clutch during a slip operation of a vehicle |
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Application Number | Priority Date | Filing Date | Title |
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DE102017123081.5A DE102017123081A1 (en) | 2017-10-05 | 2017-10-05 | Method for correctly determining a friction energy generated in a clutch during a slip operation of a vehicle |
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Publication Number | Publication Date |
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DE102017123081A1 true DE102017123081A1 (en) | 2019-04-11 |
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ID=65816909
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Application Number | Title | Priority Date | Filing Date |
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DE102017123081.5A Ceased DE102017123081A1 (en) | 2017-10-05 | 2017-10-05 | Method for correctly determining a friction energy generated in a clutch during a slip operation of a vehicle |
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Country | Link |
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DE (1) | DE102017123081A1 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005061080A1 (en) | 2005-01-20 | 2006-07-27 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Damage detection method of clutch, involves determining friction power introduced into friction surfaces of components, by slippage between torque-transferring components |
-
2017
- 2017-10-05 DE DE102017123081.5A patent/DE102017123081A1/en not_active Ceased
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005061080A1 (en) | 2005-01-20 | 2006-07-27 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Damage detection method of clutch, involves determining friction power introduced into friction surfaces of components, by slippage between torque-transferring components |
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