CN107289123A - The control device of the lock-up clutch of fluid torque-converter - Google Patents
The control device of the lock-up clutch of fluid torque-converter Download PDFInfo
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- CN107289123A CN107289123A CN201610222209.1A CN201610222209A CN107289123A CN 107289123 A CN107289123 A CN 107289123A CN 201610222209 A CN201610222209 A CN 201610222209A CN 107289123 A CN107289123 A CN 107289123A
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- driving force
- clutch
- lock
- grade
- control device
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- 239000012530 fluid Substances 0.000 title claims abstract description 34
- 230000005540 biological transmission Effects 0.000 claims abstract description 65
- 230000021615 conjugation Effects 0.000 claims abstract description 65
- 238000012937 correction Methods 0.000 claims abstract description 52
- 230000007246 mechanism Effects 0.000 claims abstract description 51
- 230000035939 shock Effects 0.000 claims abstract description 16
- 230000033228 biological regulation Effects 0.000 claims abstract description 5
- 230000001133 acceleration Effects 0.000 claims description 11
- 238000005259 measurement Methods 0.000 claims description 10
- 230000008859 change Effects 0.000 claims description 9
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 description 33
- 238000003860 storage Methods 0.000 description 22
- 238000001514 detection method Methods 0.000 description 9
- 238000009825 accumulation Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000004044 response Effects 0.000 description 3
- 238000002715 modification method Methods 0.000 description 2
- 230000008520 organization Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 208000035126 Facies Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005111 flow chemistry technique Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/14—Control of torque converter lock-up clutches
- F16H61/143—Control of torque converter lock-up clutches using electric control means
-
- 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
- F16H61/14—Control of torque converter lock-up clutches
- F16H61/143—Control of torque converter lock-up clutches using electric control means
- F16H2061/145—Control of torque converter lock-up clutches using electric control means for controlling slip, e.g. approaching target slip value
-
- 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
- F16H61/14—Control of torque converter lock-up clutches
- F16H61/143—Control of torque converter lock-up clutches using electric control means
- F16H2061/146—Control of torque converter lock-up clutches using electric control means for smoothing gear shift shock
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
Abstract
The present invention provides a kind of control device of the lock-up clutch for the fluid torque-converter that can more efficiently suppress downshift impact.Control device of the present invention is：Fluid torque-converter is used for the output shaft and the input shaft of automatic transmission for connecting the engine of vehicle, with lock-up clutch, input shaft can be mechanically directly connected to output shaft by lock-up clutch, when vehicle is in regulation driving condition, control device makes lock-up clutch be engaged with defined target conjugation grade, and control device has：Decision mechanism is vibrated, it is used for the degree for judging the velocity shock after downshift caused by downshift；Engagement control mechanism therefor, it is used for the conjugation grade for controlling lock-up clutch；Conjugation grade correction calculates mechanism, and it carries out the correction of the target conjugation grade of moment of torsion control period to automatic transmission when being used to calculate downshift, and conjugation grade correction calculates mechanism according to the judged result of vibration decision mechanism to calculate target conjugation grade correction.
Description
Technical field
The present invention relates to a kind of control device of the lock-up clutch of fluid torque-converter.
Background technology
The control for having a kind of lock-up clutch of fluid torque-converter in the prior art is filled
Put.Fluid torque-converter is used to connect the engine output shaft of vehicle and the input shaft of speed changer, the liquid
Power torque-converters has lock-up clutch, and the control device of lock-up clutch is according to accelerator open degree and car
When speed is judged as that vehicle is in defined driving condition (such as slowing down), connect lock-up clutch
Close, so that the input shaft of the output shaft of engine and speed changer connected in the way of mechanically connecting
Come, improve the transmission efficiency of fluid torque-converter, so, it is possible to reduce fuel consumption.In addition,
For example when downshifting (KD), control device changes lock-up clutch according to accelerator open degree
Engaging force, control lock-up clutch skids, and so, it is possible to suppress downshift impact, puts down vehicle
Quietly travel (patent document 1).
Prior art literature
Patent document 1：JP2008-180299A
However, in the technology of patent document 1, the hand impacted as suppressing to downshift
Section, is only to be controlled according to accelerator open degree, also there is room for improvement.
The content of the invention
In view of this, it is an object of the present invention to provide one kind can be more efficient
Ground suppresses the control device of the lock-up clutch of the fluid torque-converter of downshift impact.
To reach above-mentioned purpose, the lock-up clutch of fluid torque-converter of the invention
Control device is：The fluid torque-converter is used for the output shaft for connecting the engine of vehicle and automatic change
The input shaft of fast device, with lock-up clutch, the lock-up clutch can be by the input shaft
Mechanically it is directly connected to the output shaft, when the vehicle is in regulation driving condition
When, the control device makes the lock-up clutch be engaged with defined target conjugation grade, described
Control device has：Decision mechanism is vibrated, it is used to judge after downshift caused by downshift
The degree of velocity shock；Engagement control mechanism therefor, it is used to control connecing for the lock-up clutch
It is right；Conjugation grade correction calculates mechanism, and it is carried out when being used to calculate downshift to automatic transmission
The correction of the target conjugation grade of moment of torsion control period, the conjugation grade correction is calculated
Mechanism calculates target conjugation grade correction according to the judged result of the vibration decision mechanism.
Using above-mentioned technical proposal, corrected according to the velocity shock of vehicle locking from
Clutch makes lock-up clutch right in the conjugation grade (the sliding rate of rubbing of control) of moment of torsion control period
Automatic transmission carries out the conjugation grade reduction of moment of torsion control period, thus, it is not only able to effectively
Velocity shock, impact during ground reduction downshift, moreover, during other, lock-up clutch tool
There is higher conjugation grade, fluid torque-converter has higher transmission efficiency, so as to reduce combustion
Material consumption.
It is of the invention preferably, the vibration decision mechanism according to the state of the vehicle from
Correction calculating set in advance obtains the target conjugation grade correction, the amendment with chart
Amount calculates and graphically illustrates the state of the vehicle and the relation of the target conjugation grade correction.
It so, it is possible rapid, suitable according to the correction calculating chart prestored
Locality obtains conjugation grade correction.
In addition, the present invention is preferably, the vibration decision mechanism has：Next grade of drive
Power estimating mechanism, it deduces next grade of drive according to current shelves gear ratio and actual engine moment of torsion
Power；Actual driving force measurement mechanism, it measures actual driving force, the vibration in real time
Decision mechanism judges the speed change according to the next grade of driving force and the actual driving force
The degree of vibration.
Using such scheme, it is considered to which the actual conditions of vehicle are modified, from
And can effectively suppress downshift impact.
It is of the invention preferably, the vibration decision mechanism according to driving force convergence time come
Judge the degree of the velocity shock, the driving force convergence time refers to that actual driving force is most
To the two time when consistent in prescribed limit when just reaching next grade of driving force.
The conjugation grade of lock-up clutch is corrected according to driving force convergence time, so that
Driving force convergence time can be shortened, that is, shorten the action time of downshift impact.
Using such scheme, locking clutch is corrected according to driving force convergence time
The conjugation grade of device, thus, it is possible to shorten driving force convergence time, that is, shortens the work of downshift impact
Use the time.
In addition, the present invention is preferably, the vibration decision mechanism is according to the actual drive
The maximum that power reaches in moment of torsion phase control reaches next grade of driving with the actual driving force
The difference of value during power, to judge the degree of the velocity shock.
Using such scheme, lock-up clutch is corrected according to the difference of driving force
Conjugation grade, so as to reduce downshift impact size.
Of the invention preferred, the next grade of driving force estimating mechanism deduces the car
Next grade of fore-aft acceleration, as the next grade of driving force, the actual driving
Power measurement mechanism measures the actual fore-aft acceleration of the vehicle, as the actual drive
Power.
Using such scheme, because the response of acceleration transducer is higher, energy
The fore-aft acceleration of vehicle is enough quickly obtained, so as to promptly be handled, control is improved
The response of device processed.
Of the invention preferred, the next grade of driving force estimating mechanism deduces the car
Next grade of axle torque, as the next grade of driving force, the actual driving force
Measurement mechanism measures the actual axle torque of the vehicle, as the actual driving
Power.
Using such scheme, due to being that detection moment of torsion is used as next grade of driving force,
Thus, it is not necessary to acceleration transducer is set, cost can be reduced.
Of the invention preferred, the conjugation grade correction calculates the front lay that mechanism is calculated
The average value of the velocity shock degree obtained in the controlling cycle for determining number of times, according to the average value
To determine correction factor, in this controlling cycle, by the correction factor and previous secondary control
The product of the velocity shock degree obtained in cycle is as the conjugation grade correction.
Using such scheme, corrected due to being the average value of number of times according to the rules
Target conjugation grade in the subsequent control cycle, thus, it is possible to error detection is prevented, and raising is repaiied
Positive precision.
Brief description of the drawings
Fig. 1 is the car of the control device for the fluid torque-converter for being equipped with present embodiment
Structural schematic block diagram；
Fig. 2 is the timing diagram for representing the change of each parameter during downshift；
Fig. 3 is the target conjugation grade ETRT for the lock-up clutch showing in embodiment
Modification method an example；
Fig. 4 is the flow of the processing performed by the control device of lock-up clutch in the 1st embodiment
Figure；
Fig. 5 is the flow chart for representing step S10 particular content in Fig. 4；
Fig. 6 is the flow chart for representing step S11 particular content in Fig. 4；
Fig. 7 is the flow of the processing performed by the control device of lock-up clutch in the 2nd embodiment
Figure；
The flow of one example of clutch control when Fig. 8 is for illustrating that subregion is downshifted
Figure.
Description of reference numerals
100th, vehicle；1st, engine；2nd, fluid torque-converter；3rd, automatic transmission；4th, car
Wheel；5th, hydraulic control device；6、ECU；7th, derailleur control device；8th, locking clutch
Device control device；9th, vehicle-wheel speed sensor；10th, driving shaft torque sensor；11st, it is oily
Door operation quantity sensor；12nd, engine torque sensor；13rd, Engine Speed Sensor；14
Countershaft sensor；15th, speed of mainshaft sensor.
Embodiment
The embodiment to the present invention is carried out specifically with reference to the accompanying drawings
It is bright.
<1st, basic structure>
Fig. 1 is the car of the control device for the fluid torque-converter for being equipped with present embodiment
Structural schematic block diagram.
As shown in figure 1, vehicle 100 there is engine 1, it is fluid torque-converter 2, automatic
Speed changer 3, wheel 4, hydraulic control device 5, ECU (ECU) 6.
Engine 1 is the power source of vehicle 100, its have output shaft (bent axle, not
Diagram).
Fluid torque-converter 2 have pump impeller 21, turbine 22 and guide wheel, pump impeller 21 with
Output shaft (bent axle) connection of engine 1, turbine 22 and the input shaft of automatic transmission 3 are (main
Axle) connect, the rotation of pump impeller 21 passes to turbine 22 by liquid, so that, hydraulic moment changeable
The rotation of engine 1 is passed to automatic transmission 3 by device 2.The effect of guide wheel is to above-mentioned liquid
Body carries out water conservancy diversion.
In addition, fluid torque-converter 2 also has lock-up clutch 23, the locking clutch
Device 23 can connect pump impeller 21 and turbine 22, so as to make the output shaft of engine 1 with it is automatic
The input shaft of speed changer 3 is mechanically connected.In the present embodiment, lock-up clutch
23 be fluid pressure type, by control the hydraulic pressure of the lock-up clutch 23 can be supplied to control
Engaging force, so as to change the conjugation grade of lock-up clutch 23, changes fluid torque-converter
Transmission efficiency (speed ratio).What the transmission efficiency was represented is that the output of engine 1 is become by fluid power
Square device 2 passes to the transmission degree of automatic transmission 2.
Automatic transmission 3 is used to pass to the rotation for coming from fluid torque-converter 2
As the wheel 4 of driving wheel, vehicle can be driven to travel.In the present embodiment, automatically
Speed changer 2 is so-called double-clutch automatic gearbox (DCT).
Wheel 4 is connected by power transmission shaft with automatic transmission 3, is come from automatic
The rotatory force driving of speed changer 3.
Hydraulic control device 5 is according to coming from ECU6 signal pin to hydraulic moment changeable
Device 2 carries out hydraulic control with automatic transmission 3.Especially, in the present embodiment, hydraulic pressure
Control device 5 can control to be supplied to the hydraulic pressure of the lock-up clutch 23 to control engaging force,
Lock-up clutch 23 is set to engage or disconnect with defined engaging force.
ECU (ECU) 6 by carry out calculation process CPU, storage control
The detected signal information of the ROM of program and chart data etc. and temporarily storage testing agency with
RAM (memory) of operation result etc. etc. is constituted.The ECU6 is stored in example by performing
Control program in such as ROM realizes corresponding function, in the present embodiment, these
Function and lock-up clutch 23 control device 8 of the function at least including derailleur control device 7
Function.
In addition, vehicle 100 also has for detecting the multiple of the state parameter of vehicle
Sensor, these sensors include vehicle-wheel speed sensor 9, driving shaft torque sensor 10,
Throttle operation quantity sensor 11, engine torque sensor 12, Engine Speed Sensor 13, pair
Shaft speed transducer 14, speed of mainshaft sensor 15.The detection signal transmission of these sensors
To ECU6.
Vehicle-wheel speed sensor 9 is used for the speed for detecting wheel 4, will represent car
The information (signal) of the speed of wheel 4 is sent to ECU6.ECU6 is according to the speed of the wheel 4
Degree can calculate the speed i.e. speed of vehicle 100.
Power transmission shaft (power transmission shaft) torque sensor 10 is used for the torsion for detecting power transmission shaft
Square (actual transmission axle driving force), ECU6 is sent to by the information for representing the torque transmission shaft.
Throttle operation quantity sensor 11 is used to detect behaviour of the driver to gas pedal
(accelerator open degree) is measured, the information for representing accelerator pedal operation amount is sent to ECU6.
In addition, engine torque sensor 12, Engine Speed Sensor 13, countershaft turn
Fast sensor 14, speed of mainshaft sensor 15 are respectively used to detect that the output shaft of engine 1 is (bent
Axle) moment of torsion, the rotating speed of the output shaft of engine 1, the rotating speed of the countershaft of automatic transmission 3,
The rotating speed of the main shaft of automatic transmission 3, and corresponding detection signal is sent to ECU6.Its
In, the ratio between the rotating speed of main shaft and the rotating speed of countershaft are the gearratio (gear ratio) of automatic transmission 3,
The ratio between the rotating speed of the output shaft of engine 1 and the rotating speed of main shaft of automatic transmission 3 are hydraulic moment changeable
The gearratio (gear ratio) of device 2.
<2nd, control>
<2.1st, summary>
ECU6 is according to the accelerator pedal operation for coming from throttle operation quantity sensor 11
Amount (accelerator open degree) information and the wheel speed information (root for coming from vehicle-wheel speed sensor 9
The speed obtained according to wheel velocity), judge whether vehicle (drives in defined transport condition
State, running status, for example, slow down).When being judged as in defined transport condition, lead to
Crossing hydraulic control 5 makes the lock-up clutch 23 of fluid torque-converter 2 with defined engaging force
(defined conjugation grade, target conjugation grade) is engaged, so that by the output shaft of engine 1 and automatically
The input shaft of speed changer 3 is connected in the way of mechanically connecting.
The downshifted situation of (KD) of the automatic transmission 3 of vehicle 100 belongs to
One of transport condition as defined in stating.Fig. 2 is the change for representing each parameter during downshift
Timing diagram (the target conjugation grade of moment of torsion control period is not corrected in figure), the transverse axis in figure
For the time.
When being judged as that automatic transmission 3 downshifts, ECU6 is locked according to speed etc.
The only target conjugation grade ETRT of clutch 23, with the target conjugation grade ETRT to locking clutch
Device 23 is controlled.In the present embodiment, derailleur control device 7 and lock-up clutch
23 control devices 8 are made up of an ECU6, but the two each can also independently be constituted, this
When, lock-up clutch control apparatus 8 can be obtained according to the signal of derailleur control device 7 is come from
Know the information such as the downshift of automatic transmission 3.
Gearshift control chart can be previously stored with ECU6, gearshift control is used
The target conjugation grade ETRT of graph representation lock-up clutch 23 and multiple shifting characteristics (including
Rotating speed of the output shaft of engine 1 etc.) relation, in addition, the relation in the chart is according to speed
Difference set respectively so that, ECU6 can be obtained target conjugation grade ETRT by the chart.
Gearshift controls of the ECU6 to automatic transmission 3 generally comprises preparation control, turned round
The stages such as square phase control, inertia (inertia) phase control, finishing control.In moment of torsion phase control
In, moment of torsion is controlled, moment of torsion is sleekly changed, with can suppress gear shift shock and
Reduce shifting time.ON clutch of the moment of torsion control for example in DCT is (after gearshift
The clutch that gear is utilized) moment of torsion when reaching setting (now, general OFF sides from
The moment of torsion of clutch is gradually reduced, i.e., OFF sides clutch is gradually turned off) start to perform, pass through
Terminate (on the facies-controlled content of moment of torsion, for example, to disclose in Japanese invention patent after stipulated time
In publication JP 2012-62998, Unexamined Patent 8-233090, JP 2007-64284
There is disclosure).
In the present embodiment, when automatic transmission 3 downshifts, ECU6 judges real
The torque transmission shaft (actual transmission axle driving force, come from driving shaft torque sensor 10) on border
Whether exceed the theoretical torque transmission shaft at the end of downshifting and (be also referred to as next shelves (shelves after downshift
Position) theoretical torque transmission shaft), initially once exceed theoretical power transmission shaft in actual transmission axle moment of torsion
During moment of torsion, ECU6 makes timer initiation, starts timing, and the torsion of actual transmission axle is now arrived in calculating
Time T when square is consistent with theoretical torque transmission shaft (is also referred to as inconsistent time T or reality
Driving force wave time T or actual driving force convergence time T), also, ECU6 will count
This inconsistent time T calculated is stored, and the data bulk of accumulation storage is, for example, 3 times
(that is, the inconsistent time T respectively obtained in 3 controlling cycles, which is accumulated, to be stored,
This function is realized using counter).
Wherein, theoretical torque transmission shaft can be according to the gearratio of automatic transmission 3
The moment of torsion (engine output torque) of (gear ratio) and the output shaft of engine 1, which is calculated, (to be pushed away
It is fixed) draw.As shown in fig. 7, the theoretical torque transmission shaft calculated can be with certain model
The numerical value enclosed.
In addition, on actual transmission axle moment of torsion with theoretical torque transmission shaft is consistent sentences
Disconnected method, for example, being in the range of theoretical torque transmission shaft and continuing in actual transmission axle moment of torsion
During the stipulated time, it is judged as that the two is consistent, or, it is driven in actual transmission axle moment of torsion with theoretical
The difference of axle moment of torsion within setting and when continuing the stipulated time, is being judged as that the two is consistent.
In the present embodiment, ECU6 tries to achieve actual transmission axle moment of torsion and is driven with theoretical
The difference DELTA G of axle moment of torsion maximum Δ Gmax (difference maximum), also, calculate this
Difference maximum Δ Gmax and above-mentioned inconsistent time T product Δ Gmax*T and deposited
Storage multiple product Δ Gmax*T average value (Δ Gmax*T) ave (as described above, by
The quantity stored in accumulation is 3, thus, the average value is 3 average values (Δ Gmax*T)
ave3)。
In product average value (Δ Gmax*T) ave3 calculated and its desired value
When DGTTRG (set in advance) is inconsistent, ECU6 goes out according to the product mean value calculation
The target conjugation grade ETRT of lock-up clutch 23 correction, also, with equal after
When speed discrepancy is downshifted between the engine torque and shelves of degree, to the locking in moment of torsion phase control
The target conjugation grade ETRT of clutch 23 is modified with the correction, is reduced the target and is connect
Right ETRT, so that the difference (maximum) of actual transmission axle moment of torsion and theoretical torque transmission shaft
The degree consistent with its desired value is reached with above-mentioned inconsistent time T.
On judging whether are product average value (Δ Gmax*T) ave3 and its desired value
Consistent method, for example, can be to judge whether product average value (Δ Gmax*T) ave3 locates
In prescribed limit " (Δ Gmax*T) ave3 ± α set on the basis of its desired value DGTTRG
In (α is defined margin value) ", i.e. in DGTTRG+ α<(ΔGmax*T)
ave3<During DGTTRG- α, it is judged as that the two is consistent.
<2.2nd, the target conjugation grade ETRT of lock-up clutch 23 amendment>
It is the target conjugation grade ETRT of lock-up clutch 23 amendment shown in Fig. 3
One example of method.Imagination situation in the figure is, Δ Gmax=0.2~0.3, T=200~
300ms。
As shown in figure 3, in the present embodiment, according to engine torque during downshift with
The different demarcation region of speed discrepancy between shelves, accumulates storage according to each region and calls number respectively
According to progress target conjugation grade ETRT amendment.
Specifically, using engine torque be more than 150Nm situation as high torque,
Situation using speed discrepancy between shelves as more than 2000rpm is high speed discrepancy, and the situation of downshift is divided into
3 kinds (3 regions), i.e. the low torque slow-speed of revolution is poor, the high torque slow-speed of revolution is poor, high torque
High speed discrepancy (situation of the high speed discrepancy of low torque is not present).
When calculating target conjugation grade ETRT correction, 3 products are averaged
Value (Δ Gmax*T) ave3 is multiplied by adjusted coefficient K DGT (exemplified by 0.005) and corrected
Amount, subtracts the correction by former target conjugation grade ETRT and obtains revised target conjugation grade
ETRTKDTP。
That is, ETRTKDTP=ETRT- (Δ Gmax*T) * KDGT.
After 3 product average value (Δ Gmax*T) ave3 are calculated or amendment mesh
After the right ETRT of tag splice, make Counter Service, restart accumulation data storage.
<3rd, control flow>
<3.1st, the 1st embodiment>
Illustrate ECU6 (lock-up clutch control apparatus 8) referring to Fig. 4~Fig. 6
One of the control performed to lock-up clutch 23.
<3.1.1, overall flow>
First, in step slo, downshifted in the automatic transmission 3 of vehicle 100
When, ECU6 makes lock-up clutch 23 be engaged with defined engaging force by hydraulic control device 5.
Afterwards, in step s 11, the theoretical power transmission shaft of the gear after downshift is obtained
Moment of torsion, is used as next grade of theoretical driving force (specific content reference picture 6 is explained below).
Afterwards, in step s 12, ECU6 is sensed according to torque transmission shaft is come from
The signal of device 10, obtains actual transmission axle moment of torsion, is used as actual driving force in real time.The step
What " the actual driving force measurement mechanism " that the processing in rapid S12 corresponds in the present invention was carried out
Processing, i.e. lock-up clutch control apparatus 8 have actual driving force measurement mechanism, the actual drive
The processing that the structure of power measurement mechanism corresponds in step S12.
In step s 13, by the actual driving force of acquirement and the theoretical drive calculated
Power is compared.
When actual driving force initially exceedes theoretical driving force, timer is set to start meter
When (step S14).
Afterwards, in step S15, judge whether actual driving force reaches and theory
The consistent degree of driving force (actual driving force tends towards stability, stops fluctuation).For example, in reality
When border driving force is in the range of theoretical driving force and continues the stipulated time, be judged as the two one
Cause, or, actual transmission axle moment of torsion and theoretical torque transmission shaft difference within setting
And when continuing the stipulated time, it is judged as that the two is consistent.
When being judged as that actual driving force reaches the degree consistent with theoretical driving force,
In step s 16, according to the timing result of timer, calculate actual driving force and initially exceed
Time T during theoretical driving force to actual driving force when consistent with theoretical driving force, that is, obtain not
Consistent time T.
Also, in step S17, obtain and initially exceed theory in actual driving force
During driving force to actual driving force it is consistent with theoretical driving force when during, actual driving force is most
Big value, calculates the difference of the maximum and theoretical driving force, as actual driving force with
The difference maximum Δ Gmax of theoretical driving force.Or or the actual driving force of calculating
Value when reaching next grade of driving force of maximum and the actual driving force difference, as
The maximum difference Δ Gmax of actual driving force and theoretical driving force.
Afterwards, in step S18, calculate the maximum difference Δ Gmax with it is above-mentioned not
The product Δ Gmax*T of consistent time T, and store.
Then, in step S19, judge whether product Δ Gmax*T exceeds mesh
The scope of scale value (presetting).
In addition, " the vibration that the processing in step S12~S19 corresponds in the present invention
The processing that decision mechanism " is carried out, i.e. there is lock-up clutch control apparatus 8 vibration to judge
Mechanism, the structure of vibration decision mechanism is corresponding to the processing in step S12~S19.
When judged result in step S19 is "Yes", into step S20,
The above-mentioned product Δ Gmax*T obtained to this controlling cycle is multiplied by correction factor set in advance
KDGT, obtains ETRT corrections and (is used in the controlling cycle after, referring in particular to figure
5 are explained below), and store, then terminate the processing of this flow.
In addition, when the judged result in step S19 is "No", into step
S21,0 is set as by ETR corrections, and is stored, and then terminates the processing of this flow.
In addition, " the engagement that the processing in step S20, S21 corresponds in the present invention
The processing that degree correction calculating mechanism " is carried out, i.e. lock-up clutch control apparatus 8 has and connect
Right correction calculates mechanism, conjugation grade correction calculate mechanism structure correspond to step S20,
Processing in 21.
Above-mentioned steps S10~S20 processing is according to according to engine torque during downshift
What the region that speed discrepancy is set between shelves was carried out respectively.For example, in the present embodiment, ECU6
Memory there is the 1st~the 3rd storage part, the 1st~the 3rd storage part is respectively used to store low torsion
Square slow-speed of revolution difference region, the poor region of the high torque slow-speed of revolution, the number in the high speed discrepancy region of high torque
According to (above-mentioned ETRT corrections), according to speed discrepancy between the engine torque and shelves during downshift not
Together, the data call in above-mentioned steps S10~S20 processing is with storing utilized storage part
It is different.
Fig. 8 is for the flow chart for an example for realizing above-mentioned control.Fig. 8 institutes
Performed before the S10 of the flow shown in Fig. 4.
As shown in figure 8, in step S1001, ECU6 is sensed according to engine torque
The detection signal of device 12 judge engine torque whether moment of torsion judgement threshold value (for example
More than 150Nm).
When judged result is "Yes", into step S1002, judge that downshift is front and rear
Shelves between speed discrepancy whether more than the threshold value (such as 2000rpm) of speed discrepancy judgement,
When judged result is "Yes", into step S1003, the 3rd storage part is selected, by its determination
By carrying out the storage of data in follow-up S10~S20, S21 processing with calling what is utilized to deposit
Storage portion.
When step S1002 judged result is "No", into step S1005,
Selected 2nd storage part, line number is entered in the processing for being defined as follow-up S10~S20, S21
According to storage with call utilized storage part.
On the other hand, when above-mentioned steps S1001 judged result is "No",
Due to there is usually no the situation of the high speed discrepancy of low torque, thus it is now low turn of low torque to be considered as
The situation of speed difference, no longer judges speed discrepancy, is directly entered step S1004, selectes the
1 storage part, is defined as in follow-up S10~S20, S21 processing carrying out depositing for data
Store up and call utilized storage part.
After step S1003, S1004, S1005, into above-mentioned steps S10,
Thereafter processing is same as described above.
As variation, may not be makes memory have the 1st~the 3rd to deposit respectively
Storage portion, but the subsidiary group indication of data to being stored, when calling according to the group indication
It is called.
<3.1.2, the conjugation grade control of lock-up clutch 23>
Fig. 5 is the particular content of the processing in the step S10 for illustrating Fig. 4
Flow chart.
Reference picture 5, in initial step S101, ECU6 obtains locking clutch
The target conjugation grade ETRT of device 23.As set forth above, it is possible to be controlled according to gearshift set in advance
Target conjugation grade ETRT is determined with chart.
Afterwards, in step s 102, the target obtained in controlling cycle before is obtained
Conjugation grade correction (is obtained, step S20, S21 of reference picture 4) in controlling cycle before,
Afterwards, in step s 103, the target conjugation grade ETRT obtained in step S101 is subtracted
Target conjugation grade correction, obtains revised target conjugation grade ETRTKDTP.
Afterwards, whether in step S104, it is now to certainly to judge that ECU6 judges
During dynamic speed changer 3 carries out moment of torsion phase control.Specifically, ECU6 may determine that now
Whether in " moment of torsion of the ON sides clutch in DCT is reached after setting not yet by regulation
During time ", if in during this period, being judged as it being now moment of torsion control period.
In addition, when automatic transmission control apparatus 7 and lock-up clutch control apparatus 8
During independent composition, the judgement can also be automatic according to coming from by lock-up clutch control apparatus 8
The signal of derailleur control device 7 is carried out.
When judged result in step S104 is "No", in step s 106,
With target conjugation grade ETRT (the target conjugation grade before the amendment) controls obtained by step S101
Lock-up clutch 23, specifically, ECU6 is by corresponding to the letter of the target conjugation grade before amendment
Breath is sent to hydraulic control device 5, and the control of hydraulic control device 5 is supplied to lock-up clutch 23
Hydraulic pressure, make lock-up clutch 23 with defined engaging force engage.
When judged result in step s 102 is "Yes", after ECU6 is to correct
Target conjugation grade control lock-up clutch 23, so as to control the transmission of fluid torque-converter 2 to imitate
Rate.Specifically, the information corresponding to revised target conjugation grade is sent to liquid by ECU6
Pressure control device 5, hydraulic control device 5 adjusts the hydraulic pressure for being supplied to lock-up clutch 23, makes
Lock-up clutch 23 is engaged with defined engaging force.
After execution of step S105 or S106 processing, the main flow before return
Journey.
In addition, the processing in step S101~S106 corresponds to " connecing in the present invention
The processing that right controlling organization " is carried out, i.e. lock-up clutch control apparatus 8 has engagement
Spend the processing that the structure of controlling organization corresponds in step S101~S106.
<3.1.3 the acquirement of the theoretical driving force of the gear after, downshifting>
Fig. 6 is the acquirement processing for representing the theoretical driving force of the gear after downshift
Flow chart.
As shown in fig. 6, in step S111, ECU6 turns according to countershaft is come from
The detection signal of fast sensor 14 and speed of mainshaft sensor 15 obtains the pair of automatic transmission 3
The rotating speed of axle and main shaft.
Afterwards, in step S112, according to the countershaft of acquirement and the tachometer of main shaft
Calculate gear ratio.
In addition, in step S113, ECU6 is sensed according to engine torque is come from
The detection signal of device 12 obtains engine torque.Step S113 processing can step S111,
Carried out before S112, or it is parallel with S111, S112.
In step S114, ECU6 is according to the gear ratio of acquirement and engine torque meter
The theoretical torque transmission shaft (next grade of theoretical torque transmission shaft) of the gear after downshift is calculated, is made
For theoretical driving force, it is then back to.
In addition, in step S111~S114 processing correspond to the present invention in " under
The processing that one grade of driving force estimating mechanism " is carried out.
<3.2nd, the 2nd embodiment>
The lock-up clutch control apparatus 8 that Fig. 7 show the 2nd embodiment is carried out
Processing flow chart.Wherein, the processing in step S10~S18 and above-mentioned 1st embodiment phase
Together, thus its description is eliminated.
As shown in fig. 7, in the present embodiment, reality has been calculated in step S18
The maximum difference Δ Gmax and above-mentioned border driving force convergence time of border driving force and theoretical driving force
After T product Δ Gmax*T, in step S219, the number of times of counter is set to increase " 1 ",
Afterwards, in step S220, judge whether the number of times of counter reaches stipulated number (for example
For 3).
When being judged as being not reaching to stipulated number, (S220 judged result is "No"
When), into step S225, the correction for making ETRT is 0 and stored, and terminates this stream afterwards
The processing of journey.
On the other hand, it is judged as that the number of times of counter reaches regulation in step S220
During number of times (when S220 judged result is "Yes"), into step S221, calculating is deposited
The above-mentioned product Δ Gmax*T of the stipulated number of storage average value Ave.Then in step S222
In, make counter resets.
Afterwards, in step S223, what is calculated in judgment step S221 is upper
Whether the average value Ave for stating product Δ Gmax*T exceeds the scope of its desired value (with its target
The prescribed limit set on the basis of value).
When being judged as exceeding target range, (S223 judged result is "Yes"
When), into step S224, above-mentioned average value Ave is multiplied by defined adjusted coefficient K DGT
(for example, 0.005), obtains the correction (ETRT corrections) of target conjugation grade, and deposits
Storage, then terminates the processing of this flow.
On the other hand, it is judged as that above-mentioned average value Ave does not surpass in step S223
When going out scope (S223 judged result is "No") of its desired value, into step S225,
The correction for making ETRT is 0 and stored, and then terminates the flow processing of this controlling cycle.
In the processing of step S224, S225 in 2nd embodiment and the 1st embodiment
Step S20, S21 in substantive content it is identical, thus eliminate detailed description thereof.
In this 2nd embodiment, due to being the flat of the detected value of number of times according to the rules
Average judges whether amendment, in the calculating of correction using stipulated number detected value it is flat
Average is calculated, thus, it is possible to suppress the influence that error detection is brought, improves accuracy of detection.
<3.3rd, the variation of the 2nd embodiment>
In the 2nd embodiment, the average value Ave of the product of stipulated number is being calculated
Afterwards, counter resets (S222) are made, however, it is also possible to which the calculating in step S224 is completed
Make counter resets again afterwards.
In addition, in the 2nd embodiment, the product of stipulated number is stored in accumulation
After value, counter resets restart accumulation storage, however, it is also possible in accumulation storage
After the product value of stipulated number, when obtaining product value again, will before obtain in controlling cycle
The product value initially once obtained is deleted, and increases the product for storing and being obtained in this controlling cycle
Value, makes the quantity of the product value now stored be still stipulated number.It so, it is possible promptly
It is modified, improves the response of control device.
<4th, variation>
The foregoing is merely illustrative of the preferred embodiments of the present invention, not to limit
The present invention, within the spirit and principles of the invention, any modification for being made, equivalent substitution,
Improve etc., it should be included in the scope of the protection.
For example, in the above-described embodiment, in actual driving force and theoretical driving force
The product of maximum difference and inconsistent time when exceeding the scope of desired value, it is believed that the change of vehicle
Speed vibration (downshift impact) exceedes setting, so that, calculate ETRT (target conjugation grade)
Correction, ETRT is modified；In scope of the product without departing from desired value,
Think that the velocity shock of vehicle is not above setting, be not modified (correction is 0).
However, as ETRT correction conditions or in actual driving force and theoretical driving force
Maximum difference and inconsistent time in either one when exceeding defined threshold value, be modified,
When the two is all not above threshold value, without amendment, or only using the side in the two as bar
Part come judge whether to amendment.Specific modification method is identical with above-mentioned embodiment.
In addition, as ETRT correction conditions, according to actual driving force and theory
Driving force come judge vehicle velocity shock whether exceed setting, however, it is also possible to according to it
His vehicle status parameters are judged.
Furthermore, it is possible to prestore the state and speed change for representing vehicle in ECU6
The chart (ETRT datum-correction graphs table) of the relation of vibration, using the chart, according to detecting
Car status information (above-mentioned actual driving force with theoretical driving force etc.) obtain the change of vehicle
Speed vibration.
In the above-described embodiment, as next grade of theoretical driving force, root has been used
The presumed value deduced according to gear ratio and engine torque, however, the present invention is not limited thereto, example
Such as, it can reach that the value after stabilization carries out accumulation storage, the control after to actual driving force
Next grade of theoretical driving force is determined in cycle according to the value stored.
In addition, in the above-described embodiment, regarding the torque transmission shaft of vehicle as drive
Power, however, as driving force example or semiaxis moment of torsion (torque transmission shaft with
Semiaxis moment of torsion correspond to the present invention in car (wheel) axle moment of torsion) or vehicle fore-aft acceleration,
In the latter case, actual driving force measurement mechanism measures the actual fore-aft acceleration of vehicle,
As actual driving force, next grade of driving force estimating mechanism is estimated before and after next shelves of vehicle
Acceleration, as next grade of theoretical driving force.At this point it is possible to set acceleration transducer
To detect the fore-aft acceleration of vehicle.
In addition, in the above-described embodiment, the target for calculating lock-up clutch 23 connects
The adjusted coefficient K DGT used during right correction is steady state value set in advance, however,
Adjusted coefficient K DGT can also be determined according to above-mentioned average value Ave, for example can be according to pre-
The chart first set determines adjusted coefficient K DGT.The chart can be according to fluid torque-converter
Characteristic or the setting such as driver's operating habit.
Claims (8)
1. a kind of control device of the lock-up clutch of fluid torque-converter,
The fluid torque-converter is used for the output shaft and automatic transmission for connecting the engine of vehicle
Input shaft, with lock-up clutch, the lock-up clutch can by the input shaft with it is described
Output shaft is mechanically directly connected to,
When the vehicle is in regulation driving condition, the control device makes the locking clutch
Device is engaged with defined target conjugation grade,
Characterized in that,
The control device has：
Decision mechanism is vibrated, it is used to judge the velocity shock after downshift caused by downshift
Degree；
Engagement control mechanism therefor, it is used for the conjugation grade for controlling the lock-up clutch；
Conjugation grade correction calculates mechanism, and it is used to turn round automatic transmission when calculating downshift
The correction of the target conjugation grade during square phase control,
The conjugation grade correction calculates judged result of the mechanism according to the vibration decision mechanism
To calculate target conjugation grade correction.
2. the control device of the lock-up clutch of fluid torque-converter according to claim 1,
Characterized in that,
The vibration decision mechanism is according to the state of the vehicle from amendment gauge set in advance
Calculation obtains the target conjugation grade correction with chart, and the correction calculates and graphically illustrates institute
State the state of vehicle and the relation of the target conjugation grade correction.
3. the control device of the lock-up clutch of fluid torque-converter according to claim 1,
Characterized in that,
The vibration decision mechanism has：
Next grade of driving force estimating mechanism, it is pushed away according to current shelves gear ratio and actual engine moment of torsion
Make next grade of driving force；
Actual driving force measurement mechanism, it measures actual driving force in real time,
The vibration decision mechanism according to the next grade of driving force and the actual driving force come
Judge the degree of the velocity shock.
4. the control device of the lock-up clutch of fluid torque-converter according to claim 3,
Characterized in that,
The vibration decision mechanism judges the velocity shock according to driving force convergence time
Degree,
The driving force convergence time refers to, when actual driving force initially reachs next grade of driving force
To the two time when consistent in prescribed limit.
5. the control device of the lock-up clutch of fluid torque-converter according to claim 3,
Characterized in that,
What the vibration decision mechanism reached according to the actual driving force in moment of torsion phase control
The difference of value when maximum and the actual driving force reach next grade of driving force, it is described to judge
The degree of velocity shock.
6. the lock-up clutch of the fluid torque-converter according to any one of claim 3~5
Control device, it is characterised in that
The next grade of driving force estimating mechanism accelerates before and after deducing next shelves of the vehicle
Degree, as the next grade of driving force,
The actual driving force measurement mechanism measures the actual fore-aft acceleration of the vehicle, will
It is used as the actual driving force.
7. the lock-up clutch of the fluid torque-converter according to any one of claim 3~5
Control device, it is characterised in that
The next grade of driving force estimating mechanism deduces next grade of axle torque of the vehicle,
As the next grade of driving force,
The actual driving force measurement mechanism measures the actual axle torque of the vehicle, by it
It is used as the actual driving force.
8. according to the lock-up clutch of fluid torque-converter according to any one of claims 1 to 5
Control device, it is characterised in that
The conjugation grade correction is calculated before mechanism is calculated in the controlling cycle of stipulated number
The average value of obtained velocity shock degree, correction factor is determined according to the average value,
In this controlling cycle, the change that will be obtained in the correction factor and previous secondary control cycle
The product of fast extent of vibration is used as the conjugation grade correction.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610222209.1A CN107289123B (en) | 2016-04-11 | 2016-04-11 | The control device of the lock-up clutch of fluid torque-converter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610222209.1A CN107289123B (en) | 2016-04-11 | 2016-04-11 | The control device of the lock-up clutch of fluid torque-converter |
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| Publication Number | Publication Date |
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| CN107289123B CN107289123B (en) | 2019-08-13 |
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| CN201610222209.1A Expired - Fee Related CN107289123B (en) | 2016-04-11 | 2016-04-11 | The control device of the lock-up clutch of fluid torque-converter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114017495A (en) * | 2021-10-22 | 2022-02-08 | 浙江吉利控股集团有限公司 | Control method and system for vehicle sliding downshift |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101688604A (en) * | 2007-07-09 | 2010-03-31 | 丰田自动车株式会社 | Lock-up clutch control device |
| US20110231073A1 (en) * | 2010-03-16 | 2011-09-22 | Jatco Ltd | Control apparatus of automatic transmission |
| CN103161941A (en) * | 2011-12-16 | 2013-06-19 | Zf腓德烈斯哈芬股份公司 | Method for controlling torque converter clutch |
-
2016
- 2016-04-11 CN CN201610222209.1A patent/CN107289123B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101688604A (en) * | 2007-07-09 | 2010-03-31 | 丰田自动车株式会社 | Lock-up clutch control device |
| US20110231073A1 (en) * | 2010-03-16 | 2011-09-22 | Jatco Ltd | Control apparatus of automatic transmission |
| CN103161941A (en) * | 2011-12-16 | 2013-06-19 | Zf腓德烈斯哈芬股份公司 | Method for controlling torque converter clutch |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114017495A (en) * | 2021-10-22 | 2022-02-08 | 浙江吉利控股集团有限公司 | Control method and system for vehicle sliding downshift |
| CN114017495B (en) * | 2021-10-22 | 2023-08-11 | 浙江吉利控股集团有限公司 | Control method and system for vehicle sliding down shift |
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| CN107289123B (en) | 2019-08-13 |
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