WO2002059493A1 - Verfahren zur anpassung der kupplungskennlinie einer automatisie rten kupplung eines fahrzeuges - Google Patents
Verfahren zur anpassung der kupplungskennlinie einer automatisie rten kupplung eines fahrzeuges Download PDFInfo
- Publication number
- WO2002059493A1 WO2002059493A1 PCT/DE2002/000160 DE0200160W WO02059493A1 WO 2002059493 A1 WO2002059493 A1 WO 2002059493A1 DE 0200160 W DE0200160 W DE 0200160W WO 02059493 A1 WO02059493 A1 WO 02059493A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- clutch
- adaptation
- coefficient
- torque
- friction
- Prior art date
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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
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/02—Clutches
- B60W2710/027—Clutch torque
-
- 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
- F16D2500/50245—Calibration or recalibration of the clutch touch-point
- F16D2500/50248—During assembly
Definitions
- the present invention relates to a method for controlling and / or regulating an automated clutch of a vehicle, in which a clutch characteristic curve is adapted using an electronic clutch management system (EKM).
- EKM electronic clutch management system
- Automated clutches are known from vehicle technology, thereby enabling automation of the drive train of a vehicle, in particular a motor vehicle. It is also known that such clutches are used in an automatic transmission.
- the electronic clutch management (EKM) automates a clutch engagement process when a desired shift operation is carried out.
- the clutch characteristic can be adapted using the known method.
- the clutch characteristic of the automated clutch e.g. due to possible influences, be changed appropriately.
- this operating point can be idle when the service or parking brake is applied when the first gear is engaged.
- this stationary operating point may occur extremely rarely.
- the invention has for its object to provide a method for controlling and / or regulating an automated clutch transmission, which is further improved in particular with regard to the adaptation options.
- the adaptation can be carried out at suitable operating points.
- the clutch characteristic curve it is possible for the clutch characteristic curve to be adapted each time the vehicle is started or shifted, and the dependency on an operating condition which may be rare in the method according to the invention is avoided.
- the adaptation can also be carried out at any other operating points.
- the adaptation in the method according to the invention is thus improved overall.
- An advantageous development of the invention can provide that the adaptation in the method according to the invention is carried out using a suitable model.
- a model-based adaptation of the clutch characteristic can thus be carried out. It is possible that based on a model of the clutch characteristic curve an adaptation of the touch point but also of the coefficient of friction and / or the shape of the clutch characteristic curve is carried out. In principle, this adaptation can take place every time the clutch slips. It is also possible to provide suitable restrictions for the adaptation under certain operating conditions or operating points. For example, shortly after the engine starts, the reliability of the transmission e.g. of the engine torque signal may be restricted. It can be advantageous here if the proposed adaptation e.g. is temporarily suppressed.
- At least one input variable is taken into account when adapting the clutch characteristic.
- the adaptation of the clutch characteristic can primarily to predetermined ones
- At least one delay block is used when adapting the clutch characteristic.
- Delay blocks can preferably be used, for example, for the input variables engine speed, engine torque and / or clutch actuator position. With the aid of these delay blocks, a possible time offset between the signals, which may result, for example, from signal detection and / or signal transmission, is compensated for in such a way that the respective signals of the input variables correspond physically to the same point in time at the output of the delay blocks.
- Another development of the invention can provide that a suitable adaptation algorithm is integrated when adapting the clutch characteristic.
- the clutch torque is estimated from the respective clutch actuator position using a characteristic curve model without the adaptation algorithm. Together with the engine torque, this determines the acceleration of the internal combustion engine.
- the predicted engine speed can then be calculated from this. From the deviation between the measured and the predicted engine speed, conclusions about the quality of the model data and information about their adaptation to the physically correct values can be derived during driving operation.
- the adaptation algorithm can adapt the signals and / or the parameters depending on the respective operating point or driving state. For example, as the operating point, e.g. a slipping clutch when
- a prerequisite for a suitable model structure When using an adaptation algorithm, it is particularly advantageous if e.g. a correction term is provided for engine acceleration. For example, this can be provided according to the principle of a status observer in order to avoid deviations between the model values and the real values.
- a torque correction term can also be provided in the adaptation algorithm.
- This torque correction term is used to take into account a constant or time-varying error in the torque signal.
- Such errors which result from uncertainties in the determination of the engine torque and / or from unknown consumer torques, such as, for example, a generator, an air conditioning compressor or the like, are usually present when the Neter clutch very well to identify as non-zero idle torque.
- correction term can be provided for the clutch actuator path in the adaptation algorithm.
- This correction term is synonymous with the so-called gripping or touch point adaptation.
- KL parameter a characteristic parameter
- This can be a signal vector which is used to adapt the friction coefficient of the clutch.
- a preferably non-linear parameter identification can be used.
- a so-called extended Cayman filter (EKF) is used.
- so-called neuro-fuzzy methods are used in the design of the adaptation algorithm.
- other suitable design options can also be used.
- a suitable combination of the design options already mentioned can also be used.
- the .5 current driving state or operating point is suitably taken into account when designing the adaptation algorithm, since, due to the physical boundary conditions, the difference between the measured and the predicted engine speed once again relates to one and then more to the other adaptation variable should affect.
- the torque correction term can be adapted when the clutch is open and when the clutch is lightly applied, for example when starting or creeping.
- the characteristic curve parameters are mainly to be adjusted at higher clutch torques. According to another advantageous embodiment of the invention, it can be provided that when adapting the clutch characteristic curve, a first adaptation is overlaid by a second adaptation.
- an implemented adaptation of the coefficient of friction and / or the touch point can be provided as the first adaptation, in which, for example, by evaluating a dynamic torque balance on the clutch, a possible deviation in the applied moments is determined and the coefficient of friction is adjusted as a function of the deviation.
- This first adaptation can then be overlaid by a second adaptation, in which the shape of the coupling characteristic is preferably evaluated.
- the shape of the clutch characteristic curve can be changed due to manufacturing tolerances and / or the aging of the clutch, e.g. by setting the pad suspension, deviate from a previously determined average characteristic shape.
- correction values are calculated which are to be assigned to a specific characteristic curve position or a characteristic curve range. This enables the shape of the coupling characteristic to be determined after sufficient adaptation phases. It may not be possible to detect rapid changes in the coefficient of friction. It is necessary that adaptations are carried out at all operating points so that the global change in the coefficient of friction is recorded over the entire clutch characteristic.
- This adaptation checks in particular whether a significant part of the clutch characteristic is traversed by the torque requested by the control during a slip phase so that sufficient information about the shape of the characteristic can be obtained.
- the dynamic equilibrium on the clutch is evaluated with regard to the engine torque, the acceleration component and / or the set clutch torque at some previously defined characteristic curve points. By looking at the Differential torques at different points or locations on the clutch characteristic can then be deduced from the shape of the clutch characteristic.
- Deviations of the real clutch characteristic from the nominal clutch characteristic recorded. This described possibility of overlaying adaptations is described later by way of example using corresponding flow diagrams. Of course, other suitable processes can also be provided when adapting the method according to the invention.
- Another advantageous embodiment of the invention can provide that the adaptation of the clutch characteristic e.g. during the slipping phase of the clutch and, for example, when the engine is touring away, is preferably carried out during the disengagement to change gear.
- a comparison of the applied clutch torques, which result from the engine torque and the rotational acceleration of the engine can be carried out with the clutch characteristic curve stored in the control, and thus an advantageously simple adaptation of the clutch characteristic curve can be achieved.
- the engine torque balance on the clutch is evaluated, it being assumed that the errors that occur are only caused by a detuning of the clutch characteristic.
- the following torque balance applies to the coupling
- Coupling torque can be determined. Depending on this error, the clutch characteristic stored in the clutch control can now be corrected.
- the clutch characteristic curve can be corrected, for example, by adapting the variables describing the clutch characteristic curve, such as the coefficient of friction, the contact point or the like. If the coupling torques are sufficiently large, the coefficients of friction or parameters describing the coupling characteristic can be adjusted. According to the above equations, the coefficient of friction is reduced, for example, in the event of a positive error moment, and the coefficient of friction is increased, for example, in the case of a negative error moment.
- a crankshaft torque which corresponds to the engine torque corrected by a dynamic torque component, can be approximately 50 Nm and a clutch torque calculated in the control can be approximately 30 Nm.
- an integral method can be used as an alternative to the direct torque evaluation when adapting to correct the clutch characteristic.
- the engine speed can be determined from the existing torque signals by means of integration, so that a model engine speed is determined using the following equation.
- the adaptation of the clutch characteristic curve can be carried out in such a way that a comparison of the model engine speed with the actual engine speed forms the basis. If, after the evaluation of the above equation, deviations between the actual engine speed and the model engine speed occur, the clutch characteristic curve or the descriptive variables or parameters, such as the coefficient of friction, the touch point or the like, can be suitably changed on the basis of the deviations. For example, a positive motor torque and an engine speed less than the model speed, so the actual clutch torque is greater than that used in the control system, which means that the coefficient of friction must be increased.
- Another advantageous development of the invention can provide that, in particular when the clutch or the transmission is put into operation for the first time, a multi-stage coefficient of friction adaptation is carried out at predetermined coefficient of support points. It is possible that in the case of a multi-stage adaptation of the coefficient of friction, the coefficient of friction support points are preferably adapted in the range of high clutch torques. According to a development of the invention, it is particularly advantageous that the changes or adaptations of the coefficient of friction support points in the area of high clutch torques are transferred to other selected coefficient of friction support points. This can be provided during and / or after a full load cycle. This adaptation can preferably be used during the initial commissioning of the clutch or gearbox and e.g. activated or deactivated via external specifications together with the adaptation acceleration, which allows larger adaptation increments.
- the adaptation can also be made to friction coefficient support points, e.g. are not in the range of high clutch torques.
- any desired coefficient of friction support points can be selected.
- a predominant part of the deviation between the pre-initialized clutch characteristic and the actual clutch characteristic consists of an offset, which is the same for all coefficient of friction points. In comparison, the shape deviations will only make up a small proportion. By transferring the A- result of a selected driving cycle on all friction points, the offset can be approximately compensated.
- Coefficient of friction points in a driving cycle during the initial start-up can be advantageously avoided in a subsequent normal driving operation. Furthermore, with the method according to the invention, the adulteration of already adapted coefficient of friction support points can be avoided. Thus, a fine-tuning of the clutch characteristic in the subsequent driving operation can be completed earlier by the method according to the invention, since essentially only the shape of the clutch characteristic has to be adapted accordingly.
- the method according to the invention can be used in electronic clutch management (EKM) as well as in an automated manual transmission
- Figure 1 is a block diagram of an embodiment of the method according to the invention with a model-based adaptation of the clutch characteristic
- FIG. 2 is a flowchart of another embodiment of the method according to the invention with a superimposed adaptation of the clutch characteristic
- FIG. 3 shows a flow chart of an embodiment according to FIG. 3 of the method according to the invention.
- Figure 4 is a schematic view of an equilibrium of moments on a
- FIG. 1 shows a block diagram of a model-based adaptation of the clutch characteristic.
- the engine speed n mot , the engine torque M Mot , the clutch actuator position X Ku p P and the respective driving state or operating point are provided as input variables.
- the adaptation of the clutch characteristic curve is primarily based on the aforementioned input variables or their signals.
- delay blocks With the aid of delay blocks, a possible time offset between the respective signals of the input variables is compensated for, so that all signals at the output of the delay blocks correspond physically to the same point in time.
- the possible time offset between the signals can occur, for example, during signal acquisition and / or signal transmission.
- the clutch torque MK U PP is estimated from the clutch actuator position X Ku pp using the characteristic curve model.
- the acceleration of the internal combustion engine or inertia J Mo t is determined from the clutch torque M K up P and the engine torque M Mot .
- the predicted engine speed n ' mot can then be calculated from this.
- the adaptation algorithm is used, which, depending on the respective driving state, eg slipping clutch as a prerequisite for the in Figure 1 shown model structure, which adapts signals or parameters.
- a correction term for the engine acceleration is provided as the first output signal of the adaptation algorithm. This is used according to the principle of a condition observer in order to avoid a drifting apart of model and reality.
- ⁇ M mo t is the inclusion of a constant or slowly with time varying error in the torque signal M Mo t- Such errors, for example due to uncertainties in the determination of the engine torque or from unknown consumer moments, such as the generator or the air compressor, are typically very well identifiable as non-zero idle torque when the clutch is open.
- ⁇ ap of the clutch actuator path is provided as the third output signal of the adaptation algorithm.
- This term ⁇ ap is synonymous with a so-called gripping or touch point adaptation.
- KL parameter characteristic parameter
- This signal vector is used to adapt the friction coefficient of the clutch.
- a nonlinear parameter identification an extended Cayman filter (EKF), a neuro-fuzzy method or the like can be used.
- EKF extended Cayman filter
- a neuro-fuzzy method or the like can be used.
- the current driving state or operating point should be taken into account intensively, because due to the physical boundary conditions, the deviation from the difference n mot - n ' mot should have an effect on one and then on the other adaptation variable.
- the torque correction term ⁇ Mmo t when the clutch is open and the correction term of the clutch actuator travel ⁇ Ta p can be adapted primarily when the clutch is slightly applied, while the KL parameters are predominantly to be adapted at higher clutch torques.
- FIG. 2 a flowchart is described as an example of how an adaptation of a shape correction clutch characteristic curve can be constructed.
- the flow chart begins with engaging after changing gear or starting with step 1.
- step 2 of the preferred embodiment of the method according to the invention a next clutch torque threshold is to be determined for evaluating the dynamic balance on the clutch.
- step 3 in which it is determined whether the clutch torque is equal to the clutch torque threshold. If so, step 4 follows.
- step 4 the current clutch torque error and the coefficient of friction are saved.
- step 5 in which it is determined whether all measuring points have been processed. If not, the process goes back to step 2. If so, step 6 follows, in which it is determined whether the clutch is open (neutral position).
- step 7 follows. If no, the process is ended.
- step 7 an average of all measured torque deviations is determined.
- step 8 In which the deviations of all torque deviations from the mean are determined.
- step 9 then follows, in which the measured value with the greatest deviation from the mean value is determined.
- step 10 follows, in which the shape correction characteristic curve is corrected at the point with the greatest deviation of the coupling torque error from the mean value. The procedure is then ended.
- FIG. 1 A further flowchart of an embodiment of the method according to the invention is described in FIG.
- step 1 there is a current actuator position.
- step 2 a nominal clutch torque is determined from the characteristic curve with the current actuator position.
- step 3 in which the nominal clutch torque determined is corrected with the global coefficient of friction.
- Step 4 then follows, in which the nominal clutch torque is corrected with a correction value from the shape correction characteristic.
- step 5 follows, in which a current clutch torque is output.
- the aforementioned method can also be carried out inversely, i.e. that a target position for the actuator can be determined from a predetermined target clutch torque.
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- 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
Description
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020037009668A KR100857686B1 (ko) | 2001-01-24 | 2002-01-21 | 자동차의 자동 클러치를 제어하기 위한 방법 |
DE10290232T DE10290232D2 (de) | 2001-01-24 | 2002-01-21 | Verfahren zur Anpassung der Kupplungskennlinie einer automatisierten Kupplung eines Fahrzeuges |
BRPI0206655-6A BR0206655B1 (pt) | 2001-01-24 | 2002-01-21 | processo para controlar e/ou regular uma embreagem automatizada de um veìculo. |
US10/629,860 US7158873B2 (en) | 2001-01-24 | 2003-07-24 | Method of controlling an automated clutch of a vehicle |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10103030 | 2001-01-24 | ||
DE10103030.4 | 2001-01-24 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/629,860 Continuation US7158873B2 (en) | 2001-01-24 | 2003-07-24 | Method of controlling an automated clutch of a vehicle |
Publications (1)
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WO2002059493A1 true WO2002059493A1 (de) | 2002-08-01 |
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ID=7671533
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/DE2002/000160 WO2002059493A1 (de) | 2001-01-24 | 2002-01-21 | Verfahren zur anpassung der kupplungskennlinie einer automatisie rten kupplung eines fahrzeuges |
Country Status (7)
Country | Link |
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US (1) | US7158873B2 (de) |
KR (1) | KR100857686B1 (de) |
BR (1) | BR0206655B1 (de) |
DE (2) | DE10201982A1 (de) |
FR (1) | FR2819867B1 (de) |
IT (1) | ITMI20020113A1 (de) |
WO (1) | WO2002059493A1 (de) |
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DE19751455A1 (de) * | 1997-11-20 | 1999-05-27 | Volkswagen Ag | Verfahren zum Regeln einer automatisierten Kupplung |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19630014C2 (de) * | 1996-07-25 | 1998-05-20 | Daimler Benz Ag | Automatisch gesteuerte Kupplung |
US6246945B1 (en) * | 1996-08-10 | 2001-06-12 | Daimlerchrysler Ag | Process and system for controlling the longitudinal dynamics of a motor vehicle |
JP3230465B2 (ja) * | 1997-09-05 | 2001-11-19 | 日産自動車株式会社 | トルクコンバータのスリップ制御装置 |
US6641504B2 (en) * | 2001-03-21 | 2003-11-04 | Eaton Corporation | Method and system for establishing an engine speed target for use by a centrifugal clutch control system to launch a vehicle |
-
2002
- 2002-01-21 DE DE10201982A patent/DE10201982A1/de not_active Withdrawn
- 2002-01-21 DE DE10290232T patent/DE10290232D2/de not_active Ceased
- 2002-01-21 BR BRPI0206655-6A patent/BR0206655B1/pt not_active IP Right Cessation
- 2002-01-21 WO PCT/DE2002/000160 patent/WO2002059493A1/de not_active Application Discontinuation
- 2002-01-21 KR KR1020037009668A patent/KR100857686B1/ko active IP Right Grant
- 2002-01-23 FR FR0200809A patent/FR2819867B1/fr not_active Expired - Fee Related
- 2002-01-23 IT IT2002MI000113A patent/ITMI20020113A1/it unknown
-
2003
- 2003-07-24 US US10/629,860 patent/US7158873B2/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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DE19504847A1 (de) * | 1994-02-23 | 1995-09-28 | Luk Getriebe Systeme Gmbh | Steuerverfahren für ein Drehmoment-Übertragungssystem und Drehmoment-Übertragungssystem zur Durchführung des Steuerverfahrens |
DE19751455A1 (de) * | 1997-11-20 | 1999-05-27 | Volkswagen Ag | Verfahren zum Regeln einer automatisierten Kupplung |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2857915A1 (fr) * | 2003-07-24 | 2005-01-28 | Renault Sa | Dispositif de pilotage du glissement de l'embrayage d'une transmission automatisee |
Also Published As
Publication number | Publication date |
---|---|
US20040064232A1 (en) | 2004-04-01 |
FR2819867B1 (fr) | 2003-10-03 |
KR100857686B1 (ko) | 2008-09-08 |
KR20030077006A (ko) | 2003-09-29 |
ITMI20020113A1 (it) | 2003-07-23 |
ITMI20020113A0 (it) | 2002-01-23 |
DE10290232D2 (de) | 2003-12-18 |
BR0206655B1 (pt) | 2011-02-08 |
BR0206655A (pt) | 2004-02-03 |
DE10201982A1 (de) | 2002-07-25 |
US7158873B2 (en) | 2007-01-02 |
FR2819867A1 (fr) | 2002-07-26 |
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