CN103210230A - Detecting the interference behavior of a dual clutch system - Google Patents

Detecting the interference behavior of a dual clutch system Download PDF

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Publication number
CN103210230A
CN103210230A CN2011800555546A CN201180055554A CN103210230A CN 103210230 A CN103210230 A CN 103210230A CN 2011800555546 A CN2011800555546 A CN 2011800555546A CN 201180055554 A CN201180055554 A CN 201180055554A CN 103210230 A CN103210230 A CN 103210230A
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clutch
sub
speed changer
bifurcation point
moment
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CN103210230B (en
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E·霍德鲁斯
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Schaeffler Technologies AG and Co KG
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Schaeffler Technologies AG and Co KG
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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
    • 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
    • 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
    • F16D2500/10—System to be controlled
    • F16D2500/104—Clutch
    • F16D2500/10443—Clutch type
    • F16D2500/1045—Friction clutch
    • 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
    • F16D2500/108—Gear
    • F16D2500/1086—Concentric shafts
    • 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
    • F16D2500/11—Application
    • F16D2500/1107—Vehicles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/30—Signal inputs
    • F16D2500/302—Signal inputs from the actuator
    • F16D2500/3026—Stroke
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/30—Signal inputs
    • F16D2500/304—Signal inputs from the clutch
    • F16D2500/3042—Signal inputs from the clutch from the output shaft
    • F16D2500/30421—Torque of the output shaft
    • 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
    • F16D2500/30808—Detection of transmission in neutral
    • 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
    • F16D2500/30814—Torque 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
    • F16D2500/50—Problem to be solved by the control system
    • F16D2500/502—Relating the clutch
    • F16D2500/50245—Calibration or recalibration of the clutch touch-point
    • F16D2500/50251—During operation
    • F16D2500/50254—Brake actuated
    • 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
    • F16D2500/50251—During operation
    • F16D2500/50263—During standing still
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/70—Details about the implementation of the control system
    • F16D2500/704—Output parameters from the control unit; Target parameters to be controlled
    • F16D2500/70402—Actuator parameters
    • F16D2500/7041—Position
    • F16D2500/70414—Quick displacement to clutch touch point
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/26—Generation or transmission of movements for final actuating mechanisms
    • F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
    • F16H2061/283—Adjustment or calibration of actuator positions, e.g. neutral position
    • 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
    • F16H2342/00—Calibrating
    • F16H2342/04—Calibrating engagement of friction elements

Abstract

Method for detecting an interference behavior of a dual clutch system in a dual clutch transmission in the drive train of a motor vehicle comprising a drive unit.

Description

Drawing of the behavior of crosstalking of double clutch system
Technical field
The present invention relates to a kind of method that has according to the feature of claim 1 preamble.
Background technique
In the double clutch system, the force closure between internal-combustion engine and gear realizes that by two parallel paths this two paths respectively comprises a clutch and a sub-speed changer.These paths are converged to the direction of gear by differential mechanism.The example of a kind of known double clutch system shown in Figure 1.
The behavior of crosstalking is to the intersection during changing on another sub-speed changer at kinetic current from a sub-speed changer
Figure BDA00003207044200011
Influential and influential when the bifurcation point by assessment speed changer input speed draws (Tastpunktermittlung).
The influence of the behavior of crosstalking under the situation of the intersection during kinetic current changes on another sub-speed changer from a sub-speed changer:
Clutch is closed mostly under different travel situations, wherein, hangs a gear at corresponding sub-speed changer therewith.If kinetic current changes on another sub-speed changer from a sub-speed changer, so for example in sub-speed changer 1, hang and move and 2 grades of preliminary elections in sub-speed changer 2 with the clutch of closure for 1 grade, open like this clutch 1 slope shape and sub-speed changer 2 on clutch 2 slope shape ground closure.
In this so-called intersection, two clutch torque obtain the engine moment that applied ideally with summation.But, to compare with real system, the very little deviation in the clutch model can cause disturbing by the shock-sensitive ground of being experienced by the driver the too high or moment disappearance of moment of driving comfort at this.
Test shows that the behavior of crosstalking of clutch has the influence of can not ignore, because bifurcation point and then the clutch model of corresponding other clutch change significantly.When the intersection gear shift began, a clutch was closed to a great extent, and another clutch is just closed.According to present understanding, this treats that closed clutch always transmits with expection and compares more moment that this can cause moment too high with total amount.Therefore, under the situation of closed fully clutch, for example must consider the unconspicuous bifurcation point skew of the 1-2mm on another clutch.
The influence of behavior under the situation that the bifurcation point by assessment speed changer rotating speed draws of crosstalking:
In a dual-clutch transmission, special arrangement with two parallel paths allows to determine bifurcation point by assessment speed changer input speed.This class speed changer is open in the German patent application of DE 10 2,010 024 941.6 at application number for example., for example travel with a sub-speed changer for this reason, and hang up gear and clutch is opened at another sub-driver.By observing the rotation speed change curve of transmission input shaft, in the phase I, infer drag torque.Then in second stage, when clutch is closed on the little moment, infer clutch torque.By clutch torque more desired and that in fact reach, can during travelling, draw and and then bifurcation point and then the model of adaptation on inoperative clutch.
If the behavior of crosstalking at the clutch under the situation that the bifurcation point by assessment speed changer input speed draws under the current installation situation is not noticed that then bifurcation point can not draw with enough precision.
The crosstalk model of behavior:
Be known that the behavior of crosstalking is for example compensated as follows.Use current clutch position
Figure BDA00003207044200021
Following coherence, in order to determine moment by clutch characteristics curve f
M = f ( x ~ ) - - - ( 1 ) .
At this, obtain with the index (Index) of clutch relevantly
x 1 ~ = x 1 + a 1 x 2 + b 1 x 2 2
x 2 ~ = x 2 + a 2 x 1 + b 2 x 1 2
For described two clutches, must know to have i ∈ { 1; The parameter alpha of 2} iAnd b i
Drawing of model parameter on running test platform (Getriebeinbetriebnahmepr ü fstand):
Propose, draw the parameter a of cross-talk models at each clutch on the band edge (Bandende) on the speed changer running test platform iAnd b i, and the electronics formula of erasing that these parameters is left in control apparatus in order further to use can be made carbon copies ROM (read-only memory) (E 2Prom-Speicher) in.
At this, program for example is closed into clutch on the gearbox testrigs, that work on the low moment, transmits stable as far as possible clutch torque under the situation of this low moment.Described test stand be adjusted between the driving side of clutch and the slave end, limit good skidding in advance, this skids and stablizes by a controlling device.Hang a gear in the sub-speed changer in action, and in inoperative sub-speed changer the preliminary election neutral gear.Described program is closed and open it subsequently again with slope, a position (Positionsrampe) with the inoperative clutch on this sub-speed changer.The moment of transmitting via the clutch that works changes by handling inoperative clutch.
Then can be each clutch by the change curve of measured moment and draw parameter for cross-talk models.
Drawing for the parameter before research first operation of model parameter on the running test platform.This draws and can only carry out once on gearbox testrigs after clutch is installed in the speed changer case (Getriebeglocke).Therefore, described parameter after a while to draw not having under the situation of gearbox testrigs again be infeasible.
If under maintenance condition, in the workshop, only will there not be the double clutch system of speed changer to change, must also draw the described behavior of crosstalking for this clutch system so.
For for the execution in the controling appliance, described polynomial repressentation of crosstalking is inapplicable under specific circumstances.Expression as characteristic curve or characteristic field has allowed complicated form.
Summary of the invention
Now, task of the present invention is, proposes a kind of method, and this method for example allows to draw parameter for the cross-talk models of two clutches of double clutch by the Clutch Control software in the vehicle under the situation by means of gearbox testrigs not.
This task solves by the method that has according to the feature of claim 1.
According to the present invention, method for the behavior of crosstalking that draws dual-clutch transmission double clutch system is proposed, described dual-clutch transmission is in having the Motor Vehicle drivetrain of driver element, wherein, this dual-clutch transmission comprises two sub-speed changers, wherein, respectively dispose a friction clutch of described double clutch system for each sub-speed changer, described friction clutch respectively is arranged between a sub-speed changer and the driver element.At this, arranged according to the present invention: in the first sub-speed changer in action gear of preliminary election and in inoperative another sub-speed changer the preliminary election neutral gear, two clutches of sub-speed changer are opened fully, driver element turns round with racing speed, vehicle remains in the state of rest by vehicle brake, wherein, implement following steps successively:
A) clutch of the inoperative sub-speed changer mobile route along this clutch is moved in the initial position, this clutch is at least part of opening in this initial position;
B) clutch of the sub-speed changer that will work repeatedly moves up to a predetermined moment to closing direction from the position of opening fully, the bifurcation point moment big one predetermined value that this predetermined torque ratio is predetermined, wherein, such position of the clutch of the sub-speed changer that works is evaluated as the bifurcation point position respectively, on described position, the torque of driver element is identical with predetermined bifurcation point moment;
C) averaged in the bifurcation point position that draws, the bifurcation point position that these draw is repeatedly moved and is drawn to closing direction based on the clutch of the sub-speed changer that works in step b);
D) clutch of inoperative sub-speed changer moves predetermined highway section and a described method to closing direction and continues to arrive an end position up to the clutch of inoperative sub-speed changer in step b), and this clutch is closed at least in part on this end position.
At this, in a preferred implementation of the present invention, arrange: in step a), the position of the initial position of the clutch of inoperative sub-speed changer for opening fully.
In another preferred implementation of the present invention, arrange: in step b), with the clutch of the sub-speed changer that works repeatedly respectively slope shape ground move to closing direction.
In another preferred implementation of the present invention, arrange: in step b), the clutch of the sub-speed changer that works is moved three times to closing direction.
Arrange in another preferred implementation of the present invention: in step b), the described predetermined predetermined big predetermined value of bifurcation point moment of torque ratio is percent 0.1 to percent 75 of this predetermined bifurcation point moment.
Arrange in another preferred implementation of the present invention: in step b), described predetermined moment is the predetermined engine moment of driver element.
Arrange in another preferred implementation of the present invention: the described predetermined highway section of the clutch of the inoperative sub-speed changer in step d) has identical value in each operation process (Durchlauf) of step d).
Arrange in another preferred implementation of the present invention: in step d), the end position of the clutch of inoperative sub-speed changer is closed fully position.
In another preferred implementation of the present invention, arrange: when in step b), moving up to than a predetermined moment of the predetermined big predetermined value of bifurcation point moment the time from the position of opening fully to the direction of closure, utilize the wave filter with identical characteristics to carry out clutch position signal and torque signals, the especially filtration of engine moment signal.
In another preferred implementation of the present invention, arrange: if in step b), open a bifurcation point position that draws the clutch that works under the situation fully at inoperative clutch, this bifurcation point position be used for to determine that by another kind the bifurcation point position deviation that the method for the bifurcation point position of bifurcation point operation especially draws is excessive before, then abandon: the bifurcation point position that in step b), draws consideration or consider by weight in the averaging of step c) with weakening.
Utilize the method according to this invention, carry out drawing at the behavior of crosstalking that up to the present is considered the clutch that works thus.This behavior conduct mean value existence with respect to the bifurcation point position that draws of the clutch position of inoperative clutch of crosstalking.For up to the present being considered inoperative clutch, must carry out this method equally now.
Utilize the method according to this invention, also can carry out the drawing of the described behavior of crosstalking, repeating of namely being used for that the parameter of cross-talk models draws between turn(a)round in an advantageous manner any marching into the arena, and need not by means of gearbox testrigs.
Description of drawings
Other advantages of the present invention and favourable design proposal are the themes of following explanation and the following drawings.
Be shown specifically:
Fig. 1: have corresponding electric control device, at the connection block diagram of the known dual-clutch transmission of its structure aspects itself;
Fig. 2: the slope, position (Positionsrampen) on the clutch that works influences engine moment and engine speed;
Fig. 3: exemplarily illustrate at the characteristic curve that has drawn of crosstalking;
Fig. 4: moment is about the diagram of position;
Fig. 5: the schematic illustrations of the method according to this invention flow process.
Embodiment
The solution setting of task above-mentioned: the described parameter that is used for the cross-talk models of vehicle draws by means of the program of development for this reason, and for after compensate the requirement of operating path and be used.
Fig. 5 schematically show for solve this task, the method according to this invention flow process.Vehicle is being used for determining that the method step 510 of the behavior of crosstalking is prepared, and its mode is, in the first sub-speed changer in action gear of preliminary election and in inoperative another sub-speed changer the preliminary election neutral gear.Two clutches of sub-speed changer are opened fully, and driver element turns round with racing speed, and vehicle remains in the state of rest by vehicle brake.And then, in method step 510, also the clutch of the inoperative sub-speed changer mobile route along this clutch is moved in the initial position, open at least in part at clutch described in this initial position.
In method step 520, the clutch of the sub-speed changer that works is repeatedly moved up to a predetermined moment to closing direction from the position of opening fully, the bifurcation point moment big one predetermined value that this torque ratio is predetermined, wherein, the position (on this position, the torque of driver element is identical with predetermined bifurcation point moment) of the clutch of the sub-speed changer that works is evaluated as the bifurcation point position respectively.
In method step 530, to be averaged in the bifurcation point position that draws, these bifurcation point positions draw to repeatedly moving of closing direction based on the clutch of the sub-speed changer that works in method step 520.
In method step 540, the clutch of inoperative sub-speed changer moves a predetermined highway section to closing direction.
In method step 550, check whether the clutch of inoperative sub-speed changer reaches end position.If reach end position, described method finishes in method step 560.If do not reach end position, in method step 520, continue.
More this method is described on details ground below.
Prepare vehicle in order to determine the behavior of crosstalking, its mode is, in the sub-speed changer in action gear of preliminary election and in inoperative sub-speed changer the preliminary election neutral gear.Driving motor, common internal-combustion engine are prepared operation and are moved with racing speed.Two clutches are opened fully.The break of maneuver vehicle.This carries out in method step 510.
On inoperative clutch, move to (this carries out in method step 510) on the fixed position, this fixed position is raised to next value (this carries out) in method step 540 during each cycle (this corresponding to from method step 520 to method step 550 flow process).At this, belong to a plurality of positions of whole mobile route of clutch actuator of inoperative clutch by predetermined.Described total path be distributed into equably open fully and fully closed position between comprise that the equidistant section (this checks) of these two positions self is proved to be favourable in method step 550.
Now, with the clutch that works repeatedly (in method step 520) closed up to a little moment ground that surpasses bifurcation point moment on each cycle slope shape ground.Exemplary illustration one-period in Fig. 2, in this cycle, inoperative clutch 120 is fixedly located in the 35mm place, and on the clutch in action, and slope, three positions 110 is moved and surpasses bifurcation point up to just.
If the engine moment signal that is provided by vehicle surpasses the bifurcation point moment that limits regularly, then current clutch position is illustrated to being used for the position of bifurcation point, and this arranges in method step 520.Therefore, can draw a bifurcation point position for each the independent slope in the cycle.Then subsequently all bifurcation point positions that draw are averaged when end cycle, this carries out in method step 530.Therefore, just obtain an average bifurcation point position for one-period.Measure and confirm that the closed degree of inoperative clutch is more big, average bifurcation point position is offset to more little value.
If about the corresponding position of inoperative clutch draw when inoperative clutch is not opened fully average bifurcation point position and when inoperative clutch is opened fully the difference between the average bifurcation point position, then obtain to have described the described behavioural trait curve of crosstalking.Therefore, absolute bifurcation point position is revised and is the bifurcation point position when inoperative clutch is opened.In Fig. 3, illustrate two clutches 210 for the double clutch system, 220 the characteristic curve that draws of crosstalking.
Therefore said method can not only also be carried out at another clutch of this double clutch system at a clutch of double clutch system dividually.
The clutch that closure works:
For the clutch closure that will work up to a moment that surpasses bifurcation point moment, multiple possibility is arranged:
E) clutch that works is closed on slope, a position just above the current bifurcation point position that is stored in the software.Because this bifurcation point position dissimilated in each cycle, there is such danger, that is, drive motor stall under the situation of internal-combustion engine especially.
F) clutch that works is closed so for a long time on slope, a position, that is, demonstrate than the bigger moment of needed bifurcation point moment up to motor.Because the engine moment signal in the vehicle may suffer influence of noise/interference effect (for example owing to connect electric consumer), therefore so may take place, in the signal that is shown by motor, reach desired torque threshold too much early and draw too small bifurcation point position at this slope mistakenly.
G) clutch that works is following closed for a long time on slope, a position, that is, obviously drop under the racing speed up to engine speed.In Fig. 2, illustrate the change curve of engine speed.
Can consider by suitable logic condition e), f) and g) combination.
Signal filters:
When drawing during the slope of bifurcation point at one-period, can be next level and smooth for assessment of the signal change curve that reaches desired torque threshold with the wave filter with identical characteristics when strain position signal and engine moment signal, this torque threshold (as mentioned above) is a little moment higher than bifurcation point moment.
At this, not only filter measured engine moment, and filter clutch position, and then with these two signals for assessment of.These two signals, that is, measured engine moment and measured clutch position at this to have identical characteristics, to be that the wave filter of identical parameters filters.
By to have the wave filter trap signal of identical characteristics, the signal of clutch position is delayed as torque signals.Thus, need not consider that filtered torque signals is with respect to the delay that exists up to now of unfiltered measured clutch position signal.
Therefore, if position signal and torque signals are filtered with the wave filter with identical characteristics, obtain identical phase deviation at two signals so, thereby make characteristic curve 330 is being shown, be moment during about the position, phase deviation no longer includes influence, as can being seen by Fig. 4.
Torque threshold arbitrarily:
Alternatively, replace and to surpass bifurcation point moment until just, clutch can be closed into all arbitrarily on other the torque threshold, but is noted that at this torque threshold is more little, and the influence of noise/interference effect of engine moment just more works consumingly.Suppose described torque threshold, when using internal-combustion engine as driving machine, motor can more easy stall more bigly.
The credibility inspection of the bifurcation point position that draws:
The averaging of position of averaging or belonging to selected torque threshold of the bifurcation point position that draws can be expanded by the credibility inspection:
-under the situation that inoperative clutch is opened, the bifurcation point of the clutch that works is estimated near the bifurcation point that draws by the bifurcation point operation in advance.If the bifurcation point that draws by the slope is offset too strongly, so for example can abandons when averaging, considering measurement that this is special or come to consider the measurement that this is special by the weight of suitably choosing more weakly.
-because inoperative clutch always gets far one than closed in last one-period in each cycle, so can estimate, the bifurcation point position square threshold position that newly draws is in the inside of the band (Bandes) about the bifurcation point position square threshold position that draws at last of final cycle.
-known by measuring, for the bifurcation point position square threshold position monotonicity ground change of closed greatly inoperative clutch.Can in this zone, come the checklist tonality thus.
The credibility inspection of engine moment:
If the clutch that works is opened fully, then the engine moment signal that is provided by motor should be constant.Stronger change deducibility goes out described signal and is disturbed.In this case, can with the slope begin postpone up to the engine moment signal stable or withdraw from this process in case of necessity again.
Abandon the bifurcation point operation:
Alternatively, can be based on the time in maintenance former thereby abandon the bifurcation point operation, and from the bifurcation point position that draws of the bifurcation point position square threshold position of the inoperative clutch of opening fully can by the parameter that is used for cross-talk models introduce here draw derivation.
The use of engine speed information:
Alternatively, can replace the engine moment threshold value, wherein, under this engine moment threshold value situation, draw corresponding clutch position, and use the decline of threshold engine speed.But prerequisite is that engine controlling unit does not adapt to too consumingly and can reappear similar behavior.
The parameter of the repetition between maintenance or detection period draws:
What be used for that the parameter of cross-talk models draws repeats and can therefore also be performed during any docking.
For power is delivered in from avoiding the adverse effect to the moment precision during a sub-clutch changes on another sub-clutch, and fully provide the moment that allows described bifurcation point to adapt to by assessment speed changer input speed in the time of can adapting to (Tastpunktadaption) at bifurcation point, need draw the accurate parameter for the behavior of crosstalking of clutch.
Proposed for the drawing of the cross-talk models parameter on the running test platform, for for changing clutch during safeguard in the workshop, also do not drawn the possibility for the parameter of cross-talk models at present.Method described here allows directly in vehicle to draw parameter for cross-talk models by implementing diagnostic command.Thus, this has also opened such possibility, that is, the parameter of cross-talk models restudied in any detection and therefore adaptive with clutch abrasion.
According to Fig. 1, itself known dual-clutch transmission parallel shift transmission in other words for example has by oil-engine driven live axle 6, and this live axle can be optionally anti-ly be connected with two input shafts 8 and 10 with relatively rotating.Torque flow from live axle 6 to input shaft 8 and 10 can optionally be controlled by a clutch K1 and K2 respectively.Between input shaft 8 and output shaft 12, can switch different velocity ratios by some gear mesh, in these gear mesh only one be illustrated.Similarly, between input shaft 10 and output shaft 12, also can switch different gear mesh, in these gear mesh only one be illustrated.For controlled clutch K1 and K2 are provided with actuator 14 and 16.In order to switch these gear mesh, for example be provided with actuator 18 and 20 in order between the gear and the corresponding input shaft 8 or 10 that are arranged on input shaft 8 or 10, to produce anti-the connection in relative rotation, wherein, described gear with corresponding, continue the anti-gears engagement that is connected with output shaft 12 with relatively rotating, these actuators for example can each comprise a switching actuator and a selection actuator.Generally speaking, input shaft 8 and output shaft 12 and input shaft 10 and output shaft 12 form a sub-speed changer 22 or 24 of dual-clutch transmission respectively.
In order to control described actuator 14,16,18 and 20, use has microprocessor and the program of correspondence and the electric control device 26 of data storage, one in the described actuator is controlled in the outlet of this electric control device respectively, and entrance 28 and the sensor 30 of this electric control device, 32 or 34 connect, these sensors detect live axle 6, the rotating speed of input shaft 8 and input shaft 10, described electric control device also has other sensor for detection of the Operational Limits of vehicle drive train, for example has the sensor for detection of the rotating speed of driven wheel, sensor for detection of the position of shifting of transmission bar, for detection of sensor of the position of driving pedal etc.Shown control gear 26 can be connected with other control apparatuss of vehicle by bus system, for example is connected with device for controlling engine, controls the power regulating mechanism of motor by this device for controlling engine.These actuators for example can be designed as the bar actuator, and these bar actuators are for example controlled by electrodynamic type, and wherein, the rotation of each motor is detected by an increment counter (not shown).
Can be respectively be important for the function of clutch and in the storage of control gear 26, be saved and be curve by the moment of clutch transmission, this curve shows the transferable clutch torque relevant with the position of the position of clutch regulating mechanism, for example clutch shaft.At the functional status of clutch because under the situation of wearing and tearing and similar former thereby change, must upgrade described characteristic curve, this is undertaken by adaptive method, for this reason, for example must check the operating clutch that travels bifurcation point and must can obtainablely change the adaptive clutch characteristics of this bifurcation point.
Fig. 1 illustrate have corresponding electric control device, on its structure the connection block diagram of known dual-clutch transmission itself.In the dual-clutch transmission shown in Fig. 1, can be in the sub-speed changer 22 or 24 of correspondence (clutch of this a little speed changer is opened) hang respectively and a gear, and effective velocity ratio of speed changer is determined by that sub-speed changer of clutch closure.If in sub-speed changer 22, for example hang a gear, and clutch K1 closure, then this gear is effective for the velocity ratio between live axle 6 and the output shaft 12.Simultaneously, can in another sub-speed changer 24, hang and the new gear for the treatment of gear shift.In the time of the gear that the gear gear shift that speed changer from current extension to new extension, clutch K1 must be opened and, for the connection of not interrupting tractive force between live axle 6 and output shaft 12, clutch K2 is closed in the mode of intersecting.If clutch K2 takes over transmission of torque, when at least one in not having clutch K1, K2 slided simultaneously, clutch was owing to the polynary decision of velocity ratio damages.Therefore, at least timeliness ground, when exceeding their bifurcation point closure simultaneously, two clutch K1, K2 then produce slipping state, wherein, bifurcation point is defined as beginning that point of clutch transmitting torque under the situation that closure increases (described bifurcation point from this point, seldom the torque of ox rice is transmitted at the most), at least one under described slipping state among two clutch K1, the K2 skidded.
Reference numerals list
6 live axles
8 input shafts
10 input shafts
12 output shafts
14 actuators
16 actuators
18 actuators
20 actuators
22 sub-speed changers
24 sub-speed changers
26 control gear
28 entrances
30 sensors
32 sensors
34 sensors
The K1 clutch
The K2 clutch
110 clutches that work
120 inoperative clutches
210 clutches 1
220 clutches 2
The 310 measured moments about measured position
The 320 filtered moments about measured position
The 330 filtered moments about filtered position
510 method steps
520 method steps
530 method steps
540 method steps
550 method steps
560 method steps

Claims (10)

1. be used for drawing the method for the behavior of crosstalking of dual-clutch transmission double clutch system, described dual-clutch transmission is in having the Motor Vehicle drivetrain of driver element, wherein, described dual-clutch transmission comprises two sub-speed changers, wherein, respectively dispose a friction clutch of described double clutch system for each sub-speed changer, described friction clutch respectively is arranged between a sub-speed changer and the described driver element, it is characterized in that, in the first sub-speed changer in action gear of preliminary election and in inoperative another sub-speed changer the preliminary election neutral gear, two clutches of sub-speed changer are opened fully, described driver element turns round with racing speed, described vehicle remains in the state of rest by vehicle brake, wherein, implements following steps successively:
A) clutch of the inoperative sub-speed changer mobile route along this clutch is moved in the initial position, this clutch is at least part of opening in this initial position;
B) clutch of the sub-speed changer that will work repeatedly moves to closing direction from the position of opening fully, up to a predetermined moment, the described predetermined predetermined bifurcation point moment big one predetermined value of torque ratio, wherein, such position of the clutch of the sub-speed changer that works is evaluated as the bifurcation point position respectively, on described position, the torque of described driver element is identical with described predetermined bifurcation point moment;
C) averaged in the bifurcation point position that draws, the bifurcation point position that these draw is repeatedly moved and is drawn to closing direction based on the clutch of the sub-speed changer that works in step b);
D) clutch of inoperative sub-speed changer moves predetermined highway section and a described method to closing direction and continues to arrive an end position up to the clutch of inoperative sub-speed changer in step b), and this clutch is closed at least in part on described end position.
2. method according to claim 1 is characterized in that, in step a), and the position of the initial position of the clutch of described inoperative sub-speed changer for opening fully.
3. method according to claim 1 and 2 is characterized in that, in step b), with the clutch of the described sub-speed changer that works repeatedly respectively slope shape ground move to closing direction.
4. according to each described method in the aforementioned claim 1 to 3, it is characterized in that, in step b), the clutch of the described sub-speed changer that works is moved three times to closing direction.
5. according to each described method in the aforementioned claim 1 to 4, it is characterized in that, in step b), the described predetermined described predetermined big predetermined value of bifurcation point moment of torque ratio is percent 0.1 to percent 75 of described predetermined bifurcation point moment.
6. according to each described method in the aforementioned claim 1 to 5, it is characterized in that in step b), described predetermined moment is the predetermined engine moment of described driver element.
7. according to each described method in the aforementioned claim 1 to 6, it is characterized in that the described predetermined highway section of the clutch of the described inoperative sub-speed changer in step d) has identical value in each operation process of described step d).
8. according to each described method in the aforementioned claim 1 to 7, it is characterized in that in step d), the end position of the clutch of described inoperative sub-speed changer is closed fully position.
9. according to each described method in the aforementioned claim 1 to 8, it is characterized in that, when in step b), moving up to than a predetermined moment of the described predetermined big predetermined value of bifurcation point moment the time from the position of opening fully to the direction of closure, utilize the wave filter with identical characteristics to carry out clutch position signal and torque signals, the especially filtration of engine moment signal.
10. according to each described method in the aforementioned claim 1 to 9, it is characterized in that, if in step b), under the situation that inoperative clutch is opened fully, draw a bifurcation point position of the described clutch that works, this bifurcation point position be used for to determine that by another kind the bifurcation point position deviation that the method for the bifurcation point position of bifurcation point operation especially draws is excessive before, then abandon: the bifurcation point position that in step b), draws consideration or consider by weight in the averaging of described step c) with weakening.
CN201180055554.6A 2010-11-18 2011-10-20 Drawing of the crosstalk behavior of double clutch system Expired - Fee Related CN103210230B (en)

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DE112011103807B4 (en) 2021-02-25
CN103210230B (en) 2016-01-27

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