DE102008040690A1 - Method for determining faulty switching with double clutch gear of motor vehicle, involves combining or linking sensor signal of characteristic gear to significant total characteristic value - Google Patents
Method for determining faulty switching with double clutch gear of motor vehicle, involves combining or linking sensor signal of characteristic gear to significant total characteristic value Download PDFInfo
- Publication number
- DE102008040690A1 DE102008040690A1 DE200810040690 DE102008040690A DE102008040690A1 DE 102008040690 A1 DE102008040690 A1 DE 102008040690A1 DE 200810040690 DE200810040690 DE 200810040690 DE 102008040690 A DE102008040690 A DE 102008040690A DE 102008040690 A1 DE102008040690 A1 DE 102008040690A1
- Authority
- DE
- Germany
- Prior art keywords
- detected
- switching element
- level
- speed
- transmission
- Prior art date
- Legal status (The legal status 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 status listed.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/68—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for stepped gearings
- F16H61/684—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for stepped gearings without interruption of drive
- F16H61/688—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for stepped gearings without interruption of drive with two inputs, e.g. selection of one of two torque-flow paths by clutches
-
- 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
-
- 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
- F16H59/36—Inputs being a function of speed
- F16H59/38—Inputs being a function of speed of gearing elements
- F16H59/42—Input shaft speed
- F16H2059/425—Rate of change of input or turbine shaft 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
- 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
- F16H2059/6807—Status of gear-change operation, e.g. clutch fully engaged
-
- 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
- F16H59/36—Inputs being a function of speed
- F16H59/38—Inputs being a function of speed of gearing elements
- F16H59/42—Input shaft 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
- 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
- F16H61/04—Smoothing ratio shift
- F16H61/0403—Synchronisation before shifting
Abstract
Description
Die vorliegende Erfindung bezieht sich auf ein Verfahren zur Erkennung von Fehlschaltungen bei einem Doppelkupplungsgetriebe eines Kraftfahrzeugs gemäß dem Oberbegriff des Patentanspruchs 1.The The present invention relates to a method of recognition of faulty circuits in a dual-clutch transmission of a motor vehicle according to the generic term of claim 1
Aus dem Stand der Technik ist bekannt, bei Handschaltgetrieben eine Fehlschaltung anhand der Erfassung einer einzelnen Messgröße zu erkennen, wobei als Messgröße vorzugsweise die Schaltkraft verwendet wird, die über einen externen DMS-Aufnehmer am Schaltgestänge gemessen wird.Out the prior art is known in manual transmissions a Detect malfunction based on the detection of a single measurand, where as a measured variable preferably the switching force is used, via an external strain gauge transducer on the shift linkage is measured.
Das bekannte Verfahren kann jedoch bei Doppelkupplungsgetrieben nicht durchgeführt werden, da diese Getriebe hydraulisch geschaltet werden. Des weiteren liefert bei einem Doppelkupplungsgetriebe eine einzige mögliche Messgröße aus den zur Verfügung stehenden Messgrößen keine Information, die eindeutig auf eine Fehlschaltung schließen lässt.The However, known method can not in dual-clutch transmissions carried out because these transmissions are hydraulically switched. Furthermore provides in a dual clutch transmission a single possible measure of the to disposal none Information that clearly indicates a faulty circuit.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein Verfahren zur Erkennung von Fehlschaltungen bei einem Doppelkupplungsgetriebe eines Kraftfahrzeugs anzugeben, durch dessen Durchführung sich eine Fehlschaltung zuverlässig erkennen lässt.Of the The present invention is based on the object, a method for detecting faulty operations in a dual-clutch transmission of a motor vehicle, by carrying it out a faulty circuit reliable lets recognize.
Diese Aufgabe wird durch die Merkmale des Patentanspruchs 1 gelöst. Weitere erfindungsgemäße Ausgestaltungen und Vorteile gehen aus den Unteransprüchen hervor.These The object is solved by the features of claim 1. Further Embodiments of the invention and advantages are apparent from the dependent claims.
Demnach wird ein Verfahren vorgeschlagen, im Rahmen dessen einzelne Sensorsignale von Kenngrößen eines Doppelkupplungsgetriebes zu einem hinsichtlich einer Fehlschaltung aussagekräftigen Summenkennwert kombiniert bzw. verknüpft werden.Therefore a method is proposed in the context of which individual sensor signals of characteristics of a Double clutch transmission to one in terms of a faulty circuit meaningful Sum parameter can be combined or linked.
Erfindungsgemäß werden
als Kenngrößen die
Drehzahl der zwei Antriebswellen des Doppelkupplungsgetriebes, der
Schaltweg des für
die Schaltung benötigten
Schaltelementes des Doppelkupplungsgetriebes und optional der Pegel
des Körperschalls
des Getriebes verwendet; diese Kenngrößen werden von entsprechenden
Sensoren erfasst und vor der Verknüpfung der Sensorsignale miteinander wie
folgt aufbereitet, um Kennwerte zur Durchführung des Verfahrens zu erhalten:
Nach
der Erfassung des Drehzahlsignals der Antriebswellen wird der Drehzahlgradient
berechnet, wobei aus dem Drehzahlgradienten das Zeitfenster der
Synchronphase ermittelt wird. In vorteilhafter Weise kann anhand
eines Knicks im Steigungsverlauf ein Synchronversagen erkannt werden.According to the invention, the speed of the two drive shafts of the dual-clutch transmission, the switching path of the required for the circuit switching element of the dual-clutch transmission and optionally the level of the structure-borne noise of the transmission are used as characteristics; These parameters are detected by corresponding sensors and processed before linking the sensor signals together as follows, in order to obtain parameters for performing the method:
After detecting the speed signal of the drive shafts, the speed gradient is calculated, wherein the time window of the synchronous phase is determined from the speed gradient. Advantageously, a synchronization failure can be detected on the basis of a bend in the gradient.
Des weiteren werden anhand des erfassten Pegels des Körperschalls des Getriebes Schläge und Kratzgeräusche erkannt, was in Alleinstellung nicht sehr aussagekräftig ist, da der zeitliche Zusammenhang fehlt; zudem können Fehlschaltungen leise, d. h. ohne Schläge und Kratzgeräusche durchgeführt werden.Of others are based on the detected level of structure-borne noise the gear strikes and scratching sounds recognized, which in itself is not very meaningful, because the temporal connection is missing; In addition, faulty circuits can be quiet, d. H. without punches and scratching sounds be performed.
Erfindungsgemäß wird nach der Erfassung des Schaltwegs die Position 0 des Synchronpunktes und die Endlage des für die Schaltung benötigten Schaltelementes, beispielsweise einer Schiebemuffe erkannt.According to the invention the detection of the switching path, the position 0 of the synchronization point and the final position of the for the circuit needed switching element, For example, recognized a sliding sleeve.
Nach der Aufbereitung der Signale werden die Kennwerte wie folgt miteinander verknüpft, wobei die Kennwerte mit unterschiedlicher Gewichtung zum Summenkennwert beitragen können.To In the processing of the signals, the characteristics become as follows connected, where the characteristics with different weighting to the sum characteristic can contribute.
Anhand einer plötzlichen Veränderung (d. h. eines Knicks) des Drehzahlgradienten während der Synchronphase wird eine Fehlschaltung erkannt. In Zusammenhang mit der Position des für die Schaltung benötigten Schaltelementes kann erfindungsgemäß zwischen Synchronversagen, wenn sich das Schaltelement im Synchronpunkt befindet und Durchschalten, wenn sich das Schaltelement in der Einspurphase befindet, unterschieden werden.Based a sudden change (i.e., a break) of the speed gradient during the synchronous phase detected a faulty circuit. In connection with the position of the for the Needed circuit Switching element according to the invention between synchronous failure, when the switching element is in the synchronization point and switching through, if the switching element is in the Einspurphase distinguished become.
Des weiteren werden Peaks im Körperschall in das zeitliche Verhältnis der Schaltung gesetzt. Hierbei wird anhand von Schlägen (d. h. Peaks) vor dem Erreichen der Synchrondrehzahl Synchronversagen oder ein Durchschalter erkannt. Wenn diese Schläge erst nach dem Drehzahlangleich aber vor der Endlage der Schiebemuffe auftreten, werden sie als zweiter Druckpunkt und somit als normal bewertet, wobei in der Endlage der Schiebemuffe erfasste Schläge ebenfalls als normal eingestuft werden.Of others will be in the structure-borne sound in the time relationship the circuit set. This is based on strokes (ie. H. Peaks) before reaching the synchronous speed synchronous failure or a through switch detected. If these blows only after the speed adjustment but before the end position of the sliding sleeve occur, they are considered second pressure point and thus rated as normal, with the end position the sliding sleeve detected shocks also be classified as normal.
Folglich kann nach diesem Kriterien der Pegel des Körperschalls des Getriebes gefiltert bzw. gefiltert werden und zur Gewichtung der anderen Kriterien verwendet werden, wobei eine Gewichtung sinnvoll ist, da der Pegel der Schläge kurz vor Erreichen der Synchrondrehzahl geringer wird.consequently can be filtered according to this criteria, the level of structure-borne noise of the transmission or filtered and used to weight the other criteria where weighting makes sense, since the level of the beats is short decreases before reaching the synchronous speed.
Gemäß der Erfindung wird eine Änderung des Drehzahlgradienten auch dann als kritisch eingestuft, wenn kein Ausschlag des Körperschalls auftritt; zudem ist ein während der Synchronphase auftretender Schlag auch dann kritisch, wenn der Drehzahlgradient keinen Knick aufweist, aber das für die Schaltung benötigte Schaltelement sich in der Einspurphase befindet; ein Schlag außerhalb der Synchronphase ist gemäß der Erfindung als unkritisch einzustufen.According to the invention will be a change of Speed gradients also classified as critical, if no Rash of structure-borne sound occurs; besides, one is during The sync phase occurring impact critical even if the Speed gradient has no kink, but that for the circuit needed Switching element is in the Einspurphase; a blow outside the synchronous phase is according to the invention to be classified as uncritical.
Die Erfindung wird im Folgenden anhand der beigefügten Figuren beispielhaft näher erläutert. Es stellen dar:The invention will be explained in more detail below by way of example with reference to the attached figures. It represent:
In
Im mittleren Teil der Figur ist der Verlauf des Schaltwegs s des für die Schaltung benötigten Schaltelementes für den Fall eines Synchronversagens dargestellt. In dieser Situation befindet sich das Schaltelement im Synchronpunkt s1, wenn eine plötzliche Veränderung (d. h. ein Knick) des Drehzahlgradienten während der Synchronphase erfasst wird; bei dem gezeigten Beispiel ändert sich der Gradient der Drehzahl beim Übergang von der Phase 2 in die Phase 3.in the middle part of the figure is the course of the switching path s of the circuit required Switching element for the case of a synchronous failure. In this situation is the switching element in the synchronization point s1, if a sudden change (i.e., a kink) of the speed gradient is detected during the synchronous phase; changes in the example shown the gradient of the speed during the transition from the phase 2 in the phase 3.
Wenn
sich das Schaltelement in der Einspurphase s2 befindet, wie anhand
des unteren Teils der
In
Im
mittleren Teil der
Wie
aus dem unteren Teil der
- ss
- Schaltweg des SchaltelementesContact travel of the switching element
- s1s1
- Schaltweg des SchaltelementesContact travel of the switching element
- s2s2
- Schaltweg in der EinspurphaseContact travel in the Einspurphase
- nn
- Drehzahl einer Antriebswellerotation speed a drive shaft
- KK
- Pegel des Körperschallslevel of structure-borne sound
- tt
- ZeitTime
- ηη
- Gewichtung des Pegels des Körperschallsweighting the level of structure-borne sound
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200810040690 DE102008040690A1 (en) | 2008-07-24 | 2008-07-24 | Method for determining faulty switching with double clutch gear of motor vehicle, involves combining or linking sensor signal of characteristic gear to significant total characteristic value |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200810040690 DE102008040690A1 (en) | 2008-07-24 | 2008-07-24 | Method for determining faulty switching with double clutch gear of motor vehicle, involves combining or linking sensor signal of characteristic gear to significant total characteristic value |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102008040690A1 true DE102008040690A1 (en) | 2010-02-11 |
Family
ID=41501341
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE200810040690 Withdrawn DE102008040690A1 (en) | 2008-07-24 | 2008-07-24 | Method for determining faulty switching with double clutch gear of motor vehicle, involves combining or linking sensor signal of characteristic gear to significant total characteristic value |
Country Status (1)
Country | Link |
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DE (1) | DE102008040690A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4872337A (en) * | 1988-01-29 | 1989-10-10 | Watts Robert J | Nondestructive testing of gears |
DE10025907A1 (en) * | 1999-05-27 | 2000-11-30 | Luk Lamellen & Kupplungsbau | Gearbox with changer has device(s) for automatic determination of parameter(s) of changer and/or gate arrangement that can be determined starting from unknown changing element position |
DE102005004339A1 (en) * | 2005-01-25 | 2006-08-10 | Getrag Getriebe- Und Zahnradfabrik Hermann Hagenmeyer Gmbh & Cie Kg | Variable speed transmission and method for controlling such |
-
2008
- 2008-07-24 DE DE200810040690 patent/DE102008040690A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4872337A (en) * | 1988-01-29 | 1989-10-10 | Watts Robert J | Nondestructive testing of gears |
DE10025907A1 (en) * | 1999-05-27 | 2000-11-30 | Luk Lamellen & Kupplungsbau | Gearbox with changer has device(s) for automatic determination of parameter(s) of changer and/or gate arrangement that can be determined starting from unknown changing element position |
DE102005004339A1 (en) * | 2005-01-25 | 2006-08-10 | Getrag Getriebe- Und Zahnradfabrik Hermann Hagenmeyer Gmbh & Cie Kg | Variable speed transmission and method for controlling such |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |
Effective date: 20130201 |