CN103210230B - Drawing of the crosstalk behavior of double clutch system - Google Patents

Drawing of the crosstalk behavior of double clutch system Download PDF

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Publication number
CN103210230B
CN103210230B CN201180055554.6A CN201180055554A CN103210230B CN 103210230 B CN103210230 B CN 103210230B CN 201180055554 A CN201180055554 A CN 201180055554A CN 103210230 B CN103210230 B CN 103210230B
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CN
China
Prior art keywords
clutch
sub
speed changer
bifurcation point
moment
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Expired - Fee Related
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CN201180055554.6A
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CN103210230A (en
Inventor
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

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Control Of Transmission Device (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
  • Mechanical Operated Clutches (AREA)

Abstract

For drawing a method for the crosstalk behavior of the double clutch system in dual-clutch transmission, described dual-clutch transmission is in the Motor Vehicle drivetrain with driver element.

Description

Drawing of the crosstalk behavior of double clutch system
Technical field
The present invention relates to a kind of method with feature according to claim 1 preamble.
Background technique
In double clutch system, two parallel path implements are passed through in the force closure between internal-combustion engine and gear, and this two paths respectively comprises a clutch and a sub-speed changer.These paths are converged by the direction of differential mechanism to gear.The example of a kind of known double clutch system shown in Figure 1.
Crosstalk behavior changes to the intersection of period another sub-speed changer at kinetic current from a sub-speed changer there is impact and have impact when the bifurcation point by assessment speed changer input speed draws (Tastpunktermittlung).
The impact of the crosstalk behavior when kinetic current changes to the intersection of period another sub-speed changer from a sub-speed changer:
Under different travel situations, clutch closes mostly, wherein, corresponding sub-speed changer is therewith linked into a gear.If kinetic current changes to another sub-speed changer from a sub-speed changer, so such as 1 grade is linked into and moves and preliminary election 2 grades in sub-speed changer 2 with closed clutch in sub-speed changer 1, open such clutch 1 slope shape and clutch 2 slope shape on sub-speed changer 2 close.
In this so-called intersection, two clutch torque obtain applied engine moment ideally with summation.But compared with real system, the very little deviation in clutch model can disturb the too high or moment of the moment of driving comfort to lack at this with causing the shock-sensitive by being experienced by driver.
Test display, the crosstalk behavior of clutch has the impact of can not ignore, because the bifurcation point of the other clutch of correspondence and then clutch model change significantly.When intersection gear shift starts, a clutch closes to a great extent, and another clutch just closes.According to current understanding, this clutch to be closed always transmits more moment compared with expection, and with total amount, this can cause moment too high.Therefore, when completely closed clutch, such as, the unconspicuous bifurcation point skew of the 1-2mm on another clutch must be considered.
The impact of crosstalk behavior when the bifurcation point by assessment speed changer rotating speed draws:
In dual clutch speed changer, the special arrangement with two parallel paths allows to determine bifurcation point by assessment speed changer input speed.This kind of speed changer is such as open in the German patent application of DE102010024941.6 at application number.For this reason, such as travel with a sub-speed changer, and on another sub-driver, hang up gear and clutch is opened.By observing the rotation speed change curve of transmission input shaft, in the first phase, infer drag torque.Then, in second stage, when clutch is closed in a little moment, clutch torque is inferred.By relatively required and in fact reached clutch torque, can draw during travelling and and then the bifurcation point adapted on inoperative clutch and then model.
If the crosstalk behavior of the clutch under current installation situation when the bifurcation point by assessment speed changer input speed draws is not noted, then bifurcation point can not draw with enough precision.
The model of crosstalk behavior:
It is known that crosstalk behavior is such as compensated as follows.Use current clutch position following coherence, to determine moment by clutch characteristics curve f
M = f ( x ~ ) - - - ( 1 ) .
At this, obtain relevantly with the index (Index) of clutch
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
Must know that there is i ∈ { 1 for described two clutches; The parameter alpha of 2} iand b i.
Drawing of model parameter on practice operation (Getriebeinbetriebnahmepr ü fstand):
Propose, draw the parameter a of cross-talk models for each clutch on the band edge (Bandende) on speed changer practice operation iand b i, and the electronics formula of erasing in order to further apply, these parameters being left in control apparatus can make carbon copies ROM (read-only memory) (E 2prom-Speicher) in.
At this, program such as by gearbox testrigs, the clutch that works is closed in low moment, transmits clutch torque stable as far as possible when this low moment.Described test stand regulates skidding between the driving side and slave end of clutch, that limited in advance, and this skidding is stablized by a controlling device.Be linked into a gear in sub-speed changer in action, and in inoperative sub-speed changer preliminary election neutral gear.Inoperative clutch on this sub-speed changer closes with a slope, position (Positionsrampe) and opens it again subsequently by described program.The moment transmitted via the clutch worked is by handling inoperative clutch to change.
Then can be each clutch by the change curve of measured moment and draw parameter for cross-talk models.
The parameter drawn for studying before the first operation of the model parameter on practice operation.This draws and only can carry out once on gearbox testrigs after clutch is installed in speed changer case (Getriebeglocke).Therefore, described parameter after a while draw when there is no gearbox testrigs it is infeasible again.
If only will the double clutch system of speed changer do not had to change in workshop under maintenance condition, so must also for this clutch system draws described crosstalk behavior.
For the execution in control utensil, the polynomial repressentation of described crosstalk is inapplicable under specific circumstances.Expression as characteristic curve or characteristic field allow for more complicated form.
Summary of the invention
Now, task of the present invention is, proposes a kind of method, the method allow such as by the Clutch Control software in vehicle when not by means of the parameter of the cross-talk models of two clutches drawn when gearbox testrigs for double clutch.
This task is solved by the method with feature according to claim 1.
According to the present invention, the method of the crosstalk behavior for drawing double clutch system in dual-clutch transmission is proposed, described dual-clutch transmission is in the Motor Vehicle drivetrain with driver element, wherein, this dual-clutch transmission comprises two sub-speed changers, wherein, configure a friction clutch of described double clutch system to every sub-speed changer, described friction clutch is respectively arranged between a sub-speed changer and driver element.At this, arranged according to the present invention: preliminary election gear in the in action first sub-speed changer and in another sub-speed changer inoperative preliminary election neutral gear, two clutches of sub-speed changer are opened completely, driver element operates with racing speed, vehicle remains in state of rest by vehicle brake, wherein, following steps are implemented successively:
A) move in an initial position by the clutch of inoperative sub-speed changer along the mobile route of this clutch, this clutch is opened at least partly in this initial position;
B) clutch of the sub-speed changer worked repeatedly is moved from the position of opening completely to closing direction until a predetermined moment, the large predetermined value of bifurcation point moment that this predetermined torque ratio is predetermined, wherein, such position of the clutch of the sub-speed changer worked is evaluated as bifurcation point position respectively, on described position, the torque of driver element is identical with predetermined bifurcation point moment;
C) average to the bifurcation point position drawn, the bifurcation point position that these draw repeatedly is moved to closing direction based on the clutch of the sub-speed changer worked in step b) and draws;
D) clutch of inoperative sub-speed changer moves a predetermined section and described method continues in step b) until the clutch of inoperative sub-speed changer arrives an end position to closing direction, and on this end position, this clutch closes at least in part.
At this, arrange in a preferred implementation of the present invention: step a) in, the initial position of the clutch of inoperative sub-speed changer is the position of opening completely.
Arrange in another preferred implementation of the present invention: in step b), the clutch of the sub-speed changer worked is moved to closing direction in multiple times respectively slope shape.
Arrange in another preferred implementation of the present invention: in step b), the clutch of the sub-speed changer worked is moved three times to closing direction.
Arrange in another preferred implementation of the present invention: in step b), the predetermined value that the predetermined bifurcation point moment of described predetermined torque ratio is large is 0.1 to percent 75 percent 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 section of the clutch of the inoperative sub-speed changer in step d) has identical value in each 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 the position closed completely.
Arrange in another preferred implementation of the present invention: when moving from the position of opening completely to closed direction in step b) until one of a predetermined value larger than predetermined bifurcation point moment predetermined moment time, utilize the wave filter with identical characteristics to perform the filtration of clutch position signal and torque signals, especially engine moment signal.
Arrange in another preferred implementation of the present invention: if draw a bifurcation point position of the clutch worked in step b) under situation opened completely by inoperative clutch, this bifurcation point position is excessive with the bifurcation point position deviation drawn by another kind of method for determining the bifurcation point position that especially bifurcation point runs before, then abandon: the bifurcation point position drawn in step b) consideration or comparatively considered with weakening by weight in the averaging of step c).
Utilize according to method of the present invention, perform drawing for the crosstalk behavior being up to the present considered the clutch worked thus.This crosstalk behavior exists as the mean value of the bifurcation point position drawn of the clutch position relative to inoperative clutch.For being up to the present considered inoperative clutch, the method must be performed equally now.
Utilize according to method of the present invention, also can to perform the drawing of described crosstalk behavior, repeating of namely drawing for the parameter of cross-talk models between turn(a)round in an advantageous manner any marching into the arena, and without the need to by means of gearbox testrigs.
Accompanying drawing explanation
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 configuration aspects itself;
Fig. 2: the slope, position (Positionsrampen) on the clutch worked, affects engine moment and engine speed;
Fig. 3: the characteristic curve drawn for crosstalk is exemplarily shown;
Fig. 4: moment is about the diagram of position;
Fig. 5: according to the schematic illustrations of method flow of the present invention.
Embodiment
The solution of task above-mentioned is arranged: the described parameter for the cross-talk models in vehicle draws by means of the program developed for this reason, and in order to the operating pathway requirements of post-compensation and used.
Fig. 5 schematically show for solve this task, according to method flow of the present invention.Vehicle is prepared in the method step 510 for determining crosstalk behavior, and its mode is, preliminary election gear in the in action first sub-speed changer and in another sub-speed changer inoperative preliminary election neutral gear.Two clutches of sub-speed changer are fully opened, and driver element operates with racing speed, and vehicle is remained in state of rest by vehicle brake.And then, in method step 510, also move in initial position by the clutch of inoperative sub-speed changer along the mobile route of this clutch, described in this initial position, clutch is opened at least in part.
In method step 520, the clutch of the sub-speed changer worked repeatedly is moved from the position of opening completely to closing direction until a predetermined moment, the large predetermined value of bifurcation point moment 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 worked is evaluated as bifurcation point position respectively.
In method step 530, average to the bifurcation point position drawn, these bifurcation point positions draw to the repeatedly movement of closing direction based on the clutch of the sub-speed changer worked in method step 520.
In method step 540, the clutch of inoperative sub-speed changer moves a predetermined 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 terminates in method step 560.If do not reach end position, continue in method step 520.
More details ground describes the method below.
In order to determine that crosstalk behavior prepares vehicle, its mode is, preliminary election gear in sub-speed changer in action and in inoperative sub-speed changer preliminary election neutral gear.Motor, usually internal-combustion engine is driven to prepare run and run with racing speed.Two clutches are opened completely.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 a fixed position, this fixed position is raised to next value (this carries out in method step 540) in each cycle (this corresponding to from method step 520 to the flow process of method step 550).At this, the multiple positions belonging to the whole mobile route of the clutch actuator of inoperative clutch are predetermined.Described total path is distributed evenly into and is proved to be favourable opening the equidistant section (this checks in method step 550) comprising these two positions self between completely closed position completely.
Now, by the clutch worked in multiple times (in method step 520) on each cycle slope shape ground until close with exceeding a little moment of bifurcation point moment.In exemplary illustration one cycle in fig. 2, in this period, inoperative clutch 120 is fixedly located in 35mm place, and on clutch in action, slope, three positions 110 is moved until just beyond bifurcation point.
If the engine moment signal provided by vehicle exceedes the bifurcation point moment limited regularly, then current clutch position is illustrated as the position for bifurcation point, and this is arranged in method step 520.Therefore, a bifurcation point position can be drawn for each independent slope in the cycle.Then be averaged all drawn bifurcation point positions subsequently when end cycle, this carries out in method step 530.Therefore, an average bifurcation point position is just obtained for one-period.Measure and confirm, it is larger that inoperative clutch closes degree, and average bifurcation point position is offset to less value.
If draw the difference between the bifurcation point position average when inoperative clutch is not opened completely and the bifurcation point position average when inoperative clutch is opened completely about the position corresponding to inoperative clutch, then obtain and describe described crosstalk behavioural trait curve.Therefore, absolute bifurcation point position is revised as the bifurcation point position when inoperative clutch is opened.Illustrate the characteristic curve drawn of the crosstalk of two clutches 210,220 for double clutch system in figure 3.
Therefore said method can not only also perform for another clutch of this double clutch system for a clutch of double clutch system dividually.
The closed clutch worked:
In order to be closed by the clutch worked until the moment exceeding bifurcation point moment, there is multiple possibility:
E) clutch worked is closed into just beyond current storage bifurcation point position in software on slope, a position.Because this bifurcation point position dissimilates in each cycle, there is such danger, that is, drive the special stall in the case of internal combustion engines of motor.
F) clutch worked is closed for a long time like this on slope, a position, that is, until Engine Indication goes out the moment larger than required bifurcation point moment.Because the engine moment signal in vehicle may suffer influence of noise/interference effect (such as owing to connecting electric consumer), so may occur, in the signal shown by motor, reach required torque threshold too much early and therefore draw the too small bifurcation point position for this slope mistakenly.
G) clutch worked is closed for a long time as follows on slope, a position, that is, until engine speed obviously drops under racing speed.Illustrate the change curve of engine speed in fig. 2.
Can consider condition e by suitable logic), f) and g) combine.
Signal filters:
When drawing during the slope of bifurcation point at one-period, can come smoothly for assessment of the signal intensity curve reaching required 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 by these two signals for assessment of.These two signals, that is, measured engine moment and measured clutch position filter with the wave filter with identical characteristics, i.e. identical parameters at this.
By the filters filter signal to have identical characteristics, the signal of clutch position is delayed by as torque signals.Thus, the delay that up to now exist of filtered torque signals relative to unfiltered measured clutch position signal need not be considered.
Therefore, if position signal and torque signals are filtered with the wave filter with identical characteristics, so on two signals, identical phase deviation is obtained, thus make characteristic curve 330 is being shown, namely when moment is about position, phase deviation no longer includes impact, as can be seen by Fig. 4.
Arbitrary torque threshold:
Alternatively, replace until just beyond bifurcation point moment, clutch can be closed in all arbitrarily other torque threshold, but here, it is noted that torque threshold is less, the influence of noise/interference effect of engine moment works more consumingly.Suppose described torque threshold, when using internal-combustion engine as driving machine, motor can easier stall largelyr.
The credibility inspection of the bifurcation point position drawn:
The averaging of position of averaging or belonging to selected torque threshold of the bifurcation point position drawn can be expanded by credibility inspection:
-when inoperative clutch is opened, the bifurcation point of the clutch worked is estimated to be run near drawn bifurcation point by bifurcation point prior.If the bifurcation point drawn by slope offsets too strong, so such as can abandon considering this special measurement when averaging or weaker considering this special measurement by the weight suitably chosen.
-because inoperative clutch always closes to obtain far one piece than in upper one-period in each cycle, so can estimate, the bifurcation point position/force square threshold position newly drawn is in the inside of a band (Bandes) about the bifurcation point position/force square threshold position finally drawn of final cycle.
-known by measurement, for greatly closed inoperative clutch bifurcation point position/force square threshold position monotonicity change.Checklist tonality can be carried out in this region thus.
The credibility inspection of engine moment:
If the clutch worked is opened completely, then the engine moment signal provided by motor should be constant.Stronger change deducibility goes out described signal and is disturbed.In this case, slope can be started to postpone until engine moment signal is stable or exit this process if desired again.
Abandon bifurcation point to run:
Alternatively, bifurcation point can be abandoned run in maintenance based on time reason, and derivation can be drawn by the presented here of the parameter for cross-talk models from the bifurcation point position drawn of the bifurcation point position/force square threshold position for the inoperative clutch opened completely.
The use of engine speed information:
Alternatively, engine moment threshold value can be replaced, wherein, under this engine moment threshold condition, draw corresponding clutch position, and use the decline of threshold engine speed.But prerequisite is, engine controlling unit does not carry out adapting to and can reappearing similar behavior too consumingly.
Draw in the parameter of the repetition safeguarded or between detection period:
What the parameter for cross-talk models drew repeats and can therefore also be performed during any docking.
To change to another sub-clutch from a sub-clutch adverse effect that period avoids torque accuracy in order to power is delivered in, and fully provide by assessment speed changer input speed the moment allowing described bifurcation point to adapt to when can adapt to (Tastpunktadaption) at bifurcation point, need the accurate parameter of the crosstalk behavior drawn for clutch.
Propose drawing of the cross-talk models parameter on practice operation, changed for clutch in safeguarding in workshop, also do not draw the possibility of the parameter for cross-talk models at present.Method described here allows directly in vehicle, to draw the parameter for cross-talk models by enforcement diagnostic command.Thus, this also opens such possibility, that is, the parameter of cross-talk models restudied in any detection and therefore adaptive with clutch abrasion.
According to Fig. 1, known dual-clutch transmission in other words parallel shift transmission itself has such as by oil-engine driven live axle 6, and this live axle can optionally be connected with two input shafts 8 and 10 in anti-relative rotation.Optionally can control respectively by clutch K1 and K2 from live axle 6 to the torque flow input shaft 8 and 10.Different velocity ratios can be switched by some gear mesh between input shaft 8 and output shaft 12, 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.In order to controlled clutch K1 and K2 is provided with actuator 14 and 16.In order to switch these gear mesh, such as in order to be provided with actuator 18 and 20 being arranged in the gear on input shaft 8 or 10 and produce anti-connection in relative rotation between corresponding input shaft 8 or 10, wherein, described gear with corresponding, continue with output shaft 12 gears meshing that is connected in anti-relative rotation, these actuators such as eachly can comprise a switching actuator and and select 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 manipulate described actuator 14, 16, 18 and 20, use the electric control device 26 with microprocessor and corresponding program and data storage, the outlet of this electric control device manipulates one in described actuator 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 detecting the Operational Limits of vehicle drive train, such as there is the sensor of the rotating speed for detecting driven wheel, for detecting the sensor of the position of shifting of transmission bar, for detecting sensor of the position of drive pedal etc.Shown control gear 26 can be connected with other control apparatuss of vehicle by bus system, such as, be connected with device for controlling engine, is controlled the power regulating mechanism of motor by this device for controlling engine.These actuators such as can be designed as bar actuator, and these bar actuators are such as manipulated by electrodynamic type, and wherein, the rotation of each motor is detected by an increment counter (not shown).
The moment that can be transmitted by clutch is respectively important and is saved as curve in the storage of control gear 26 for the function of clutch, and this curve describes the transferable clutch torque relevant to the position of the position of clutch regulating mechanism, such as clutch shaft.When the functional status of clutch changes due to wearing and tearing and similar reason, described characteristic curve must be upgraded, this is undertaken by adaptive method, for this reason, the bifurcation point travelling operating clutch must such as be checked and must can obtainablely change the adaptive clutch characteristics of this bifurcation point.
Fig. 1 illustrates the connection block diagram of that have corresponding electric control device, known in its structure dual-clutch transmission own.In dual-clutch transmission in FIG, in the sub-speed changer 22 or 24 of correspondence, (clutch of this little speed changer is opened) gear can be linked into respectively, and effective velocity ratio of speed changer is determined by that sub-speed changer that clutch is closed.If be such as linked into a gear in sub-speed changer 22, and clutch K1 closes, then this gear is effective for the velocity ratio between live axle 6 and output shaft 12.Meanwhile, the new gear treating gear shift can be linked in another sub-speed changer 24.By speed changer from the current speed shift be linked into the gear be newly linked into time, clutch K1 must be opened and, in order to the connection not interrupting tractive force between live axle 6 and output shaft 12, clutch K2 with intersect mode be closed.If clutch K2 adapter transmission of torque, when at least one not having in clutch K1, K2 is slided simultaneously, clutch damages due to the polynary decision of velocity ratio.Therefore, at least temporally, then slipping state is produced when the bifurcation point that two clutches K1, K2 exceed them is closed simultaneously, wherein, bifurcation point is defined as that point of clutch transmitting torque when closed increase from this point (in described bifurcation point, seldom the torque of ox rice is passed at the most), at least one under described slipping state in two clutches K1, K2 is 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
K1 clutch
K2 clutch
110 clutches worked
120 inoperative clutches
210 clutches 1
220 clutches 2
310 about the moment measured by measured position
320 about the filtered moment of measured position
330 about the filtered moment of filtered position
510 method steps
520 method steps
530 method steps
540 method steps
550 method steps
560 method steps

Claims (10)

1. for drawing the method for the crosstalk behavior of double clutch system in dual-clutch transmission, described dual-clutch transmission is in the Motor Vehicle drivetrain with driver element, wherein, described dual-clutch transmission comprises two sub-speed changers, wherein, configure a friction clutch of described double clutch system to every sub-speed changer, described friction clutch is respectively arranged between a sub-speed changer and described driver element, it is characterized in that, preliminary election gear in action first sub-speed changer and in another sub-speed changer inoperative preliminary election neutral gear, two clutches of sub-speed changer are opened completely, described driver element operates with racing speed, vehicle remains in state of rest by vehicle brake, wherein, implement following steps successively:
A) move in an initial position by the clutch of inoperative sub-speed changer along the mobile route of this clutch, this clutch is opened at least partly in this initial position;
B) clutch of the sub-speed changer worked repeatedly is moved from the position of opening completely to closing direction, until a predetermined moment, the large predetermined value of bifurcation point moment that described predetermined torque ratio is predetermined, wherein, such position of the clutch of the sub-speed changer worked is evaluated as bifurcation point position respectively, on described position, the torque of described driver element is identical with described predetermined bifurcation point moment;
C) average to the bifurcation point position drawn, the bifurcation point position that these draw is based in step b) in the clutch of sub-speed changer that works repeatedly move to closing direction and draw;
D) inoperative sub-speed changer clutch to closing direction move a predetermined section and described method in step b) in continue until the clutch of inoperative sub-speed changer arrives an end position, on described end position, this clutch closes at least in part.
2. method according to claim 1, is characterized in that, step a) in, the initial position of the clutch of described inoperative sub-speed changer is the position of opening completely.
3. method according to claim 1 and 2, is characterized in that, in step b) in, the clutch of the described sub-speed changer worked is moved to closing direction in multiple times respectively slope shape.
4., according to aforementioned method according to claim 3, it is characterized in that, in step b) in, the clutch of the described sub-speed changer worked is moved three times to closing direction.
5., according to aforementioned method according to claim 1, it is characterized in that, in step b) in, the predetermined value that bifurcation point moment predetermined described in described predetermined torque ratio is large is 0.1 to percent 75 percent of described predetermined bifurcation point moment.
6., according to aforementioned method according to claim 5, it is characterized in that, in step b) in, described predetermined moment is the predetermined engine moment of described driver element.
7., according to aforementioned method according to claim 1, it is characterized in that, in steps d) in the described predetermined section of clutch of described inoperative sub-speed changer in described steps d) each process in there is identical value.
8., according to aforementioned method according to claim 7, it is characterized in that, in steps d) in, the end position of the clutch of described inoperative sub-speed changer is the position closed completely.
9. according to aforementioned method according to claim 1, it is characterized in that, when in step b) in move from the position of opening completely to closed direction until a predetermined moment than the large predetermined value of described predetermined bifurcation point moment time, utilize the wave filter with identical characteristics to perform the filtration of clutch position signal and torque signals, especially engine moment signal.
10. according to aforementioned method according to claim 1, it is characterized in that, if in step b) in draw when inoperative clutch is opened completely described in the bifurcation point position of clutch of working, this bifurcation point position is excessive with the bifurcation point position deviation drawn by another kind of method for determining the bifurcation point position that especially bifurcation point runs before, then abandon: in step b) in the bifurcation point position that draws at described step c) the middle consideration or comparatively considered with weakening by weight of averaging.
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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WO2012065587A3 (en) 2012-08-30
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