CN107289123B - 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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- CN107289123B CN107289123B CN201610222209.1A CN201610222209A CN107289123B CN 107289123 B CN107289123 B CN 107289123B CN 201610222209 A CN201610222209 A CN 201610222209A CN 107289123 B CN107289123 B CN 107289123B
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- 239000012530 fluid Substances 0.000 title claims abstract description 40
- 230000005540 biological transmission Effects 0.000 claims abstract description 75
- 230000021615 conjugation Effects 0.000 claims abstract description 64
- 230000007246 mechanism Effects 0.000 claims abstract description 62
- 238000012937 correction Methods 0.000 claims abstract description 49
- 230000035939 shock Effects 0.000 claims abstract description 23
- 230000033228 biological regulation Effects 0.000 claims abstract description 3
- 230000001133 acceleration Effects 0.000 claims description 22
- 238000005259 measurement Methods 0.000 claims description 10
- 230000008859 change Effects 0.000 claims description 8
- 238000012545 processing Methods 0.000 description 30
- 238000003860 storage Methods 0.000 description 23
- 238000001514 detection method Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 238000002715 modification method Methods 0.000 description 3
- 230000004043 responsiveness Effects 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 208000035126 Facies Diseases 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005111 flow chemistry technique Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- -1 thus Substances 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
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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
- 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
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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
- 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 of fluid torque-converter that can more efficiently inhibit downshift to impact.Control device of the present invention are as follows: fluid torque-converter is used to connect the output shaft of the engine of vehicle and the input shaft of automatic transmission, with lock-up clutch, input shaft can be mechanically directly connected to by lock-up clutch with output shaft, when vehicle is in regulation driving condition, control device engages lock-up clutch with defined target conjugation grade, control device includes vibration decision mechanism, is used to judge the degree of the velocity shock due to caused by downshift after downshift；Engagement control mechanism therefor is used to control the conjugation grade of lock-up clutch；Conjugation grade correction amount calculates mechanism, carries out the correction amount of the target conjugation grade of moment of torsion control period when being used to calculate downshift to automatic transmission, and conjugation grade correction amount calculates mechanism according to the judging result of vibration decision mechanism to calculate target conjugation grade correction amount.
Description
Technical field
The present invention relates to a kind of control devices of the lock-up clutch of fluid torque-converter.
Background technique
There is a kind of control device of the lock-up clutch of fluid torque-converter in the prior art.Fluid torque-converter is for connecting vehicle
Engine output shaft and speed changer input shaft, which has lock-up clutch, and the control of lock-up clutch fills
It sets when being judged as that vehicle be in defined driving condition (such as deceleration) according to accelerator open degree and speed, connects lock-up clutch
It closes, so that the input shaft of the output shaft of engine and speed changer be connected in a manner of being mechanically connected, improves hydraulic moment changeable
The transmission efficiency of device so, it is possible to reduce fuel consumption.In addition, control device is according to accelerator open degree for example at downshift (KD)
Change the engaging force of lock-up clutch, control lock-up clutch skids, so, it is possible to inhibit downshift impact, keep vehicle steady
Ground travels (patent document 1).
Existing technical literature
Patent document 1:JP2008-180299A
However, in the technology of patent document 1, as the means for inhibiting downshift impact, only according to accelerator open degree come
It is controlled, there is also room for improvement.
Summary of the invention
In view of this, the object of the present invention is to provide the fluid power changes that one kind can more efficiently inhibit downshift to impact
The control device of the lock-up clutch of square device.
In order to achieve the above objectives, the control device of the lock-up clutch of fluid torque-converter of the invention are as follows: the fluid power becomes
Square device be used for connect vehicle engine output shaft and automatic transmission input shaft, have lock-up clutch, the locking from
The input shaft and the output shaft can be mechanically directly connected to by clutch, drive shape when the vehicle is in regulation
When state, the control device engages the lock-up clutch with defined target conjugation grade, and the control device includes vibration
Decision mechanism is used to judge the degree of the velocity shock due to caused by downshift after downshift；Engagement control mechanism therefor is used for
Control the conjugation grade of the lock-up clutch；Conjugation grade correction amount calculates mechanism, to automatic transmission when being used to calculate downshift
The correction amount of the target conjugation grade of moment of torsion control period is carried out, the conjugation grade correction amount calculates mechanism according to the vibration
The judging result of decision mechanism is moved to calculate target conjugation grade correction amount.
By adopting the above technical scheme, lock-up clutch is corrected according to the velocity shock of vehicle in moment of torsion control period
Conjugation grade (the sliding rate of rubbing of control), reduces lock-up clutch in the conjugation grade for carrying out moment of torsion control period to automatic transmission,
Thus, velocity shock, impact when being not only able to be effectively reduced downshift, moreover, during other, lock-up clutch have compared with
High conjugation grade, fluid torque-converter transmission efficiency with higher, so as to reduce fuel consumption.
The present invention is preferred, and the vibration decision mechanism is calculated from preset correction amount according to the state of the vehicle and used
Chart obtains the target conjugation grade correction amount, and the correction amount calculates the state and the target for graphically illustrating the vehicle
The relationship of conjugation grade correction amount.
So, it is possible correction amount calculating chart according to the pre-stored data rapidly, suitably obtain conjugation grade correction amount.
In addition, the present invention is preferred, the vibration decision mechanism includes next grade of driving force estimating mechanism, according to current
Shelves gear ratio and actual engine torque deduce next grade of driving force；Practical driving force measurement mechanism, measures reality in real time
Border driving force, the vibration decision mechanism judge that the speed change is shaken according to the next grade of driving force and the practical driving force
Dynamic degree.
Using such scheme, the actual conditions of vehicle are considered to be modified, so as to effectively inhibit downshift punching
It hits.
The present invention is preferred, and the vibration decision mechanism judges the journey of the velocity shock according to driving force convergence time
It spends, the driving force convergence time refers to, when practical driving force initially reachs next grade of driving force within the specified scope to the two
Time when consistent.
The conjugation grade of lock-up clutch is corrected according to driving force convergence time, when so as to shorten driving force convergence
Between, that is, shorten the action time of downshift impact.
Using such scheme, the conjugation grade of lock-up clutch is corrected according to driving force convergence time, thus, it is possible to contract
Short driving force convergence time shortens the action time of downshift impact.
In addition, the present invention is preferred, the vibration decision mechanism reaches in torque phase control according to the practical driving force
Value when reaching next grade of driving force of maximum value and the practical driving force difference, to judge the degree of the velocity shock.
Using such scheme, the conjugation grade of lock-up clutch is corrected according to the difference of driving force, so as to reduce
Downshift the size impacted.
The present invention is preferred, and the next grade of driving force estimating mechanism deduces next grade of fore-aft acceleration of the vehicle,
As the next grade of driving force, the practical front and back that the practical driving force measurement mechanism measures the vehicle accelerates
Degree, as the practical driving force.
The front and back of vehicle can be quickly obtained since the responsiveness of acceleration transducer is higher using such scheme
Acceleration improves the responsiveness of control device so as to promptly be handled.
The present invention is preferred, and the next grade of driving force estimating mechanism deduces next grade of axle torque of the vehicle, will
, as the next grade of driving force, the practical driving force measurement mechanism measures the practical axle torque of the vehicle for it, will
It is as the practical driving force.
Using such scheme, due to being detection torque as next grade of driving force, thus, it is not necessary to acceleration biography is set
Sensor can reduce cost.
The present invention is preferred, and the conjugation grade correction amount is calculated and obtained in the control period of stipulated number before mechanism calculates
Velocity shock degree average value, correction factor is determined according to the average value, in this secondary control period, is repaired described
The product of the velocity shock degree obtained in positive coefficient and previous secondary control period is as the conjugation grade correction amount.
Using such scheme, the target in the subsequent control period is corrected due to being the average value of number according to the rules and is connect
It is right, thus, it is possible to prevent error detection, and improve amendment precision.
Detailed description of the invention
Fig. 1 is the structural schematic block diagram of the vehicle of the control device of the fluid torque-converter equipped with present embodiment；
The timing diagram of Fig. 2 variation of each parameter when being for indicating downshift；
Fig. 3 is one of the modification method of the target conjugation grade ETRT for the lock-up clutch showing in specific embodiment
Example；
Fig. 4 is the flow chart of processing performed by the control device of lock-up clutch in the 1st embodiment；
Fig. 5 is the flow chart for indicating the particular content of step S10 in Fig. 4；
Fig. 6 is the flow chart for indicating the particular content of step S11 in Fig. 4；
Fig. 7 is the flow chart of processing performed by the control device of lock-up clutch in the 2nd embodiment；
The flow chart of one example of clutch control when Fig. 8 is for illustrating that subregion is downshifted.
Description of symbols
100, vehicle；1, engine；2, fluid torque-converter；3, automatic transmission；4, wheel；5, hydraulic control device；6,
ECU；7, derailleur control device；8, lock-up clutch control apparatus；9, vehicle-wheel speed sensor；10, torque transmission shaft senses
Device；11, throttle operation quantity sensor；12, engine torque sensor；13, Engine Speed Sensor；14 countershaft sensors；15, main
Shaft speed transducer.
Specific embodiment
Specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.
<1, basic structure>
Fig. 1 is the structural schematic block diagram of the vehicle of the control device of the fluid torque-converter equipped with present embodiment.
As shown in Figure 1, vehicle 100 has engine 1, fluid torque-converter 2, automatic transmission 3, wheel 4, hydraulic control device
5, ECU (electronic control unit) 6.
Engine 1 is the power source of vehicle 100, with output shaft (crankshaft, not shown).
Fluid torque-converter 2 has pump impeller 21, turbine 22 and guide wheel, and pump impeller 21 is connect with the output shaft (crankshaft) of engine 1, whirlpool
Wheel 22 is connect with the input shaft (main shaft) of automatic transmission 3, and the rotation of pump impeller 21 passes to turbine 22 by liquid, thus, liquid
The rotation of engine 1 is passed to automatic transmission 3 by power torque-converters 2.The effect of guide wheel is to carry out water conservancy diversion to aforesaid liquid.
In addition, fluid torque-converter 2 also has lock-up clutch 23, which can connect pump impeller 21 and turbine
22, so as to connect the output shaft of engine 1 mechanically with the input shaft of automatic transmission 3.In present embodiment
In, lock-up clutch 23 is fluid pressure type, it can be supplied to the hydraulic of the lock-up clutch 23 by controlling and control engaging force,
So as to change the conjugation grade of lock-up clutch 23, change the transmission efficiency (speed ratio) of fluid torque-converter.The transmission efficiency
What is indicated is that the output of engine 1 passes to the transmitting degree of automatic transmission 2 by fluid torque-converter 2.
Automatic transmission 3 is for will pass to the wheel 4 as driving wheel from the rotation of fluid torque-converter 2, with energy
Enough drive vehicle driving.In the present embodiment, automatic transmission 2 is so-called double-clutch automatic gearbox (DCT).
Wheel 4 is connect by transmission shaft with automatic transmission 3, by the rotation power drive from automatic transmission 3.
Hydraulic control device 5 carries out fluid torque-converter 2 with automatic transmission 3 according to the signal pin from ECU6 hydraulic
Control.Particularly, in the present embodiment, hydraulic control device 5, which can control, is supplied to the hydraulic next of the lock-up clutch 23
Engaging force is controlled, lock-up clutch 23 is made to engage or disconnect with defined engaging force.
ECU (electronic control unit) 6 is by the CPU of carry out calculation process, the ROM of storage control program and chart data etc. and temporary
When the detected signal information of the storage testing agency and composition such as RAM (memory) of operation result etc..The ECU6 is deposited by executing
The control program in such as ROM etc. is stored up to realize corresponding function, in the present embodiment, these functions include at least speed change
The function of 23 control device 8 of function and lock-up clutch of device control device 7.
In addition, vehicle 100 also has multiple sensors for detecting the state parameter of vehicle, 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, countershaft speed probe 14, speed of mainshaft sensor 15.The detection signal of these sensors sends ECU6 to.
Vehicle-wheel speed sensor 9 is used to detect the speed of wheel 4, will indicate that the information (signal) of the speed of wheel 4 is sent out
Give ECU6.ECU6 can calculate the speed i.e. speed of vehicle 100 according to the speed of the wheel 4.
Transmission shaft (transmission shaft) torque sensor 10 is used to detect the torque (actual transmission axis driving force) of transmission shaft, will
Indicate that the information of the torque transmission shaft is sent to ECU6.
Throttle operation quantity sensor 11 is for detecting that driver to the operating quantity (accelerator open degree) of gas pedal, will indicate
The information of accelerator pedal operation amount is sent to ECU6.
In addition, engine torque sensor 12, Engine Speed Sensor 13, countershaft speed probe 14, the speed of mainshaft sense
Device 15 is respectively used to detect the torque of the output shaft (crankshaft) of engine 1, the revolving speed of the output shaft of engine 1, automatic transmission 3
The revolving speed of the revolving speed of countershaft, the main shaft of automatic transmission 3, and corresponding detection signal is sent to ECU6.Wherein, turn of main shaft
The ratio between speed and the revolving speed of countershaft are the transmission ratio (gear ratio) of automatic transmission 3, the revolving speed of the output shaft of engine 1 and fluid drive
The ratio between revolving speed of main shaft of device 3 is the transmission ratio (gear ratio) of fluid torque-converter 2.
<2, control>
<2.1, summary>
ECU6 according to from throttle operation quantity sensor 11 accelerator pedal operation amount (accelerator open degree) information and come
From in the wheel speed information (speed obtained according to wheel velocity) of vehicle-wheel speed sensor 9, judge whether vehicle is in rule
Fixed driving status (driving condition, operating status, such as slow down).When being judged as in defined driving status, pass through liquid
Pressure control mechanism 5 makes the lock-up clutch 23 of fluid torque-converter 2 with defined engaging force (defined conjugation grade, target conjugation grade)
Engagement, so that the output shaft of engine 1 and the input shaft of automatic transmission 3 be connected in a manner of being mechanically connected.
The case where automatic transmission 3 of vehicle 100 is downshifted (KD) belong to it is above-mentioned as defined in driving status wherein it
One.The timing diagram of Fig. 2 variation of each parameter when being for indicating downshift (do not repair in figure by the target conjugation grade of moment of torsion control period
Just), the horizontal axis in figure is the time.
When being judged as that automatic transmission 3 downshifts, ECU6 obtains the target conjugation grade of lock-up clutch 23 according to speed etc.
ETRT controls lock-up clutch 23 with the target conjugation grade ETRT.In the present embodiment, derailleur control device 7
Be made of with 23 control device 8 of lock-up clutch an ECU6, but the two respectively can also be constituted independently, at this point, locking from
Clutch control device 8 can know the information such as the downshift of automatic transmission 3 according to from 7 signal of derailleur control device.
Shift control chart can be previously stored in ECU6, shift control graphically illustrates lock-up clutch 23
The relationship of target conjugation grade ETRT and multiple shifting characteristics (revolving speed etc. of the output shaft including engine 1), in addition, in the chart
Relationship is set separately according to the difference of speed, thus, ECU6 can be obtained target conjugation grade ETRT by the chart.
ECU6, which generally comprises the shift control of automatic transmission 3, prepares control, torque phase control, inertia (inertia)
The stages such as phase control, finishing control.In torque phase control, torque is controlled, changes torque sleekly, can press down
Gear shift shock processed and reduce shifting time.(gear after shift is utilized ON clutch of the moment of torsion control for example in DCT
Clutch) torque when reaching specified value (at this point, the torque of the general side OFF clutch is gradually reduced, i.e. the side OFF clutch
It is gradually turned off) start to execute, terminate after the stipulated time (about the facies-controlled content of torque, such as in Japanese invention patent
Publication special open 2012-62998, Japanese Laid-Open Patent Publication 8-233090 have disclosure in special open 2007-64284).
In the present embodiment, when automatic transmission 3 downshifts, ECU6 judges actual torque transmission shaft (actual transmission
Axis driving force, from driving shaft torque sensor 10) it whether is more than theoretical torque transmission shaft (under also referred to as at the end of downshift
One grade (gear after downshift) theoretical torque transmission shaft), it is initially once more than theoretical torque transmission shaft in actual transmission axis torque
When, ECU6 makes timer initiation, starts timing, calculate arrive at this time actual transmission axis torque it is consistent with theory torque transmission shaft when
Time T (also referred to as inconsistent time T or practical driving force wave time T or practical driving force convergence time T), also,
ECU6 stores this calculated inconsistent time T, and the data bulk for accumulating storage is, for example, 3 times (that is, controlling at 3
The inconsistent time T respectively obtained in period, which is accumulated, to be stored, this function is realized using counter).
Wherein, theoretical torque transmission shaft can be according to the output shaft of transmission ratio (gear ratio) and engine 1 of automatic transmission 3
Torque (engine output torque) calculated (presumption) and obtained.As shown in fig. 7, calculated theory torque transmission shaft can be
With a certain range of numerical value.
In addition, about actual transmission axis torque and the consistent judgment method of theoretical torque transmission shaft, for example, in actual transmission
When axis torque is within the scope of theoretical torque transmission shaft and continues the stipulated time, it is judged as that the two is consistent, alternatively, in actual transmission
The difference of axis torque and theoretical torque transmission shaft within specified value and when continuing the stipulated time, is being judged as that the two is consistent.
In the present embodiment, ECU6 acquires the maximum of the difference DELTA G of actual transmission axis torque and theoretical torque transmission shaft
It is worth Δ Gmax (difference maximum value), also, calculates the product Δ of difference maximum value Δ Gmax Yu above-mentioned inconsistent time T
Average value (Δ Gmax*T) ave of the Gmax*T and multiple product Δ Gmax*T stored is (as noted previously, as accumulation is deposited
The quantity of storage is 3, thus, which is 3 average value (Δ Gmax*T) ave3).
It is different in calculated product average value (Δ Gmax*T) ave3 and its target value DGTTRG (preset)
When cause, ECU6 goes out the correction amount of the target conjugation grade ETRT of lock-up clutch 23 according to the product mean value calculation, also, at it
Afterwards with when rotational speed difference is downshifted between the engine torque of equal extent and shelves, to the lock-up clutch 23 in torque phase control
Target conjugation grade ETRT is modified with the correction amount, reduces target conjugation grade ETRT, so that actual transmission axis torque and reason
Reach and the consistent degree of its target value by the difference (maximum value) and above-mentioned inconsistent time T of torque transmission shaft.
About judging product average value (Δ Gmax*T) ave3 and the whether consistent method of its target value, such as it can be and sentence
Whether disconnected product average value (Δ Gmax*T) ave3 is in the prescribed limit " (Δ set on the basis of its target value DGTTRG
Gmax*T in) ave3 ± α (α is defined margin value) ", that is, in DGTTRG+ α < (Δ Gmax*T) ave3 < DGTTRG- α, sentence
Break for the two it is consistent.
The amendment of the target conjugation grade ETRT of lock-up clutch 23<2.2,>
It is an example of the modification method of the target conjugation grade ETRT of lock-up clutch 23 shown in Fig. 3.In the figure
Imagining situation is Δ Gmax=0.2~0.3, T=200~300ms.
As shown in figure 3, in the present embodiment, according to the different demarcation area of rotational speed difference between engine torque and shelves when downshift
Domain accumulates storage respectively according to each region and calls data, carries out the amendment of target conjugation grade ETRT.
Specifically, the situation for being 150Nm or more using engine torque is high torque, with rotational speed difference between shelves be 2000rpm with
On situation be high rotational speed difference, will downshift the case where be divided into 3 kinds (3 regions), that is, the low torque slow-speed of revolution is poor, low turn of high torque
The high rotational speed difference of speed difference, high torque the case where (low torque high rotational speed difference be not present).
When calculating the correction amount of target conjugation grade ETRT, by 3 product average value (Δ Gmax*T) ave3 multiplied by amendment
COEFFICIENT K DGT (for 0.005) obtains correction amount, and former target conjugation grade ETRT is subtracted the correction amount and obtains revised mesh
The right ETRTKDTP of tag splice.
That is, ETRTKDTP=ETRT- (Δ Gmax*T) * KDGT.
After calculating 3 product average value (Δ Gmax*T) ave3 or after amendment target conjugation grade ETRT, make counter
Service restarts to accumulate storing data.
<3, control flow>
<the 3.1, the 1st embodiment>
Illustrate the control that ECU6 (lock-up clutch control apparatus 8) executes lock-up clutch 23 referring to Fig. 4~Fig. 6
An example of system.
<3.1.1, overall flow>
Firstly, in step slo, when the automatic transmission 3 of vehicle 100 downshifts, ECU6 is made by hydraulic control device 5
Lock-up clutch 23 is with the engagement of defined engaging force.
Later, in step s 11, the theoretical torque transmission shaft for obtaining the gear after downshift, as next grade of theoretical driving
Power (specific content is explained below referring to Fig. 6).
Later, in step s 12, ECU6 is obtained real in real time according to the signal from driving shaft torque sensor 10
Border torque transmission shaft, as practical driving force.Processing in step S12 corresponds to " the practical driving force measurement in the present invention
The processing that mechanism " is carried out, i.e. lock-up clutch control apparatus 8 have practical driving force measurement mechanism, the practical driving force meter
The structure of mechanism is surveyed corresponding to the processing in step S12.
In step s 13, the practical driving force of acquirement is compared with calculated theoretical driving force.
When practical driving force is more than initially theoretical driving force, timer is made to start timing (step S14).
Later, in step S15, judge whether practical driving force reaches (practical to drive with the consistent degree of theoretical driving force
Power tends towards stability, stopping is fluctuated).For example, when practical driving force is within the scope of theoretical driving force and continues the stipulated time,
It is judged as that the two is consistent, alternatively, within specified value and continuing in the difference of actual transmission axis torque and theoretical torque transmission shaft
When the stipulated time, it is judged as that the two is consistent.
When being judged as that practical driving force reaches degree consistent with theoretical driving force, in step s 16, according to timer
Timing result, when consistent with theoretical driving force to practical driving force when to calculate practical driving force initially be more than theoretical driving force
Time T, that is, obtain inconsistent time T.
Also, in step S17, obtain when practical driving force is more than initially theoretical driving force to practical driving force and reason
During when consistent by driving force, the maximum value of practical driving force calculates the difference of the maximum value and theoretical driving force, by it
Difference maximum value Δ Gmax as practical driving force and theoretical driving force.Alternatively, being also possible to calculate practical driving force most
The difference of value when big value and the practical driving force reach next grade of driving force, as practical driving force and theory driving force
Maximum difference Δ Gmax.
Later, in step S18, the product Δ Gmax*T of the maximum difference Δ Gmax Yu above-mentioned inconsistent time T are calculated,
And it stores.
Then, in step S19, judge whether product Δ Gmax*T exceeds the range of target value (presetting).
In addition, the processing that " vibration decision mechanism " that the processing in step S12~S19 corresponds in the present invention is carried out,
That is, lock-up clutch control apparatus 8 has vibration decision mechanism, the structure for vibrating decision mechanism corresponds in step S12~S19
Processing.
When judging result in step S19 is "Yes", S20 is entered step, to above-mentioned multiplying of obtaining in this secondary control period
Product Δ Gmax*T obtains ETRT correction amount and (uses, have in the control period later multiplied by preset adjusted coefficient K DGT
Body is explained below referring to Fig. 5), and store, then terminate the processing of this process.
In addition, enter step S21 when judging result in step S19 is "No", ETR correction amount is set as 0, and
Storage, then terminates the processing of this process.
In addition, " conjugation grade correction amount calculates mechanism " that the processing in step S20, S21 corresponds in the present invention is carried out
Processing, i.e., lock-up clutch control apparatus 8 have conjugation grade correction amount calculate mechanism, conjugation grade correction amount calculate mechanism knot
Structure is corresponding to the processing in step S20,21.
The area that rotational speed difference is set between engine torque and shelves when the processing of above-mentioned steps S10~S20 is according to according to downshift
What domain carried out respectively.For example, in the present embodiment, the memory of ECU6 has the 1st~the 3rd storage unit, the 1st~the 3rd storage unit
It is respectively used to the data in storage low torque slow-speed of revolution difference region, high torque slow-speed of revolution difference region, the high rotational speed difference region of high torque
(above-mentioned ETRT correction amount), according to the difference of rotational speed difference between engine torque when downshifting and shelves, the place of above-mentioned steps S10~S20
Data call in reason to store utilized storage unit also different.
Fig. 8 is the flow chart of an example for realizing above-mentioned control.Before S10 of the process shown in Fig. 8 in Fig. 4
It executes.
As shown in figure 8, ECU6 judges that engine is turned round according to the detection signal of engine torque sensor 12 in step S1001
Whether square is more than the threshold value (such as 150Nm) of torque judgement.
When judging result is "Yes", S1002 is entered step, whether rotational speed difference is in rotational speed difference between judging the shelves of downshift front and back
More than the threshold value (such as 2000rpm) of judgement, when judging result is "Yes", S1003 is entered step, selectes the 3rd storage unit,
It determines it as the storage for carrying out data in the processing of subsequent S10~S20, S21 and calls utilized storage unit.
When the judging result of step S1002 is "No", S1005 is entered step, the 2nd storage unit is selected, determines it as
Subsequent S10~S20, S21 processing in carry out the storages of data and call utilized storage unit.
On the other hand, when the judging result of above-mentioned steps S1001 is "No", since there is usually no the high revolving speeds of low torque
Difference situation, thus be considered as be at this time low torque slow-speed of revolution difference situation, no longer rotational speed difference is judged, is directly entered step
S1004 selectes the 1st storage unit, determines it as the storage and calling that data are carried out in the processing of subsequent S10~S20, S21
The storage unit utilized.
After step S1003, S1004, S1005, into above-mentioned steps S10, processing thereafter is same as described above.
As variation, may not be makes memory be respectively provided with the 1st~the 3rd storage unit, but to the number stored
According to subsidiary group indication, it is called when calling according to the group indication.
<the conjugation grade control of 3.1.2, lock-up clutch 23>
Fig. 5 is the flow chart of the particular content for the processing in the step S10 of explanatory diagram 4.
Referring to Fig. 5, in initial step S101, ECU6 obtains the target conjugation grade ETRT of lock-up clutch 23.As above
It is described, target conjugation grade ETRT can be determined according to preset shift control with chart.
Later, in step s 102, it obtains in the target conjugation grade correction amount that the control period obtains before (in control before
Obtained in period processed, referring to step S20, S21 of Fig. 4), later, in step s 103, target obtained in step S101 is connect
Right ETRT subtracts target conjugation grade correction amount, obtains revised target conjugation grade ETRTKDTP.
Later, whether in step S104, judging ECU6 judgement at this time is facies-controlled to the progress torque of automatic transmission 3
Period.Specifically, whether ECU6 may determine that at this time in " torque of the side the ON clutch in DCT reaches after specified value still
Without the stipulated time " during, if being judged as it is moment of torsion control period at this time in during this period.
In addition, the judgement may be used also when automatic transmission control apparatus 7 and lock-up clutch control apparatus 8 are independently constituted
To be carried out by lock-up clutch control apparatus 8 according to the signal from automatic transmission control apparatus 7.
When judging result in step S104 is "No", in step s 106, connect with the target obtained by step S101
Right ETRT (the target conjugation grade before amendment) controls lock-up clutch 23, specifically, ECU6 will correspond to the mesh before correcting
The right information of tag splice is sent to hydraulic control device 5, and the control of hydraulic control device 5 is supplied to the hydraulic of lock-up clutch 23,
Make lock-up clutch 23 with the engagement of defined engaging force.
When judging result in step s 102 is "Yes", ECU6 controls lock-up clutch with revised target conjugation grade
23, to control the transmission efficiency of fluid torque-converter 2.Specifically, ECU6 will correspond to the letter of revised target conjugation grade
Breath is sent to hydraulic control device 5, and the adjustment of hydraulic control device 5 is supplied to the hydraulic of lock-up clutch 23, makes lock-up clutch
23 with the engagement of defined engaging force.
Main flow after the processing for executing the step S105 or S106, before returning.
In addition, the place that " engagement control mechanism therefor " that the processing in step S101~S106 corresponds in the present invention is carried out
Reason, that is, there is lock-up clutch control apparatus 8 structure of engagement control mechanism therefor to correspond to the place in step S101~S106
Reason.
<acquirement of the theoretical driving force of the gear after 3.1.3, downshift>
Fig. 6 is the flow chart for indicating the acquirement processing of the theoretical driving force of the gear after downshifting.
As shown in fig. 6, ECU6 is according to from countershaft speed probe 14 and speed of mainshaft sensor in step S111
15 detection signal obtains the countershaft of automatic transmission 3 and the revolving speed of main shaft.
Later, in step S112, gear ratio is calculated according to the revolving speed of the countershaft of acquirement and main shaft.
In addition, ECU6 obtains engine according to the detection signal from engine torque sensor 12 and turns round in step S113
Square.The processing of step S113 can carry out before step S111, S112, or parallel with S111, S112.
In step S114, ECU6 calculates the theoretical biography of the gear after downshift according to the gear ratio and engine torque of acquirement
Moving axis torque (next grade of theoretical torque transmission shaft), as theoretical driving force, then returns.
In addition, in step S111~S114 processing correspond to the present invention in " next grade of driving force estimating mechanism " institute into
Capable processing.
<the 3.2, the 2nd embodiment>
The flow chart for the processing that the lock-up clutch control apparatus 8 that Fig. 7 show the 2nd embodiment is carried out.Wherein, step
Processing in S10~S18 is identical as above-mentioned 1st embodiment, thus its description is omitted.
As shown in fig. 7, in the present embodiment, practical driving force and theoretical driving force have been calculated in step S18 most
After the product Δ Gmax*T of big difference DELTA Gmax and above-mentioned border driving force convergence time T, in step S219, make counter
Number increases " 1 " and in step S220, judges whether the number of counter reaches stipulated number (for example, 3) later.
Be judged as do not reach stipulated number when "No" (judging result of S220 be), enter step S225, make
The correction amount of ETRT is 0 and stores, and terminates the processing of this process later.
On the other hand, (the judging result of S220 when being judged as that the number of counter reaches stipulated number in step S220
When for "Yes"), S221 is entered step, the average value Ave of the above-mentioned product Δ Gmax*T of stored stipulated number is calculated.Then
In step S222, make counter resets.
Later, in step S223, in judgment step S221 calculated above-mentioned product Δ Gmax*T average value Ave
Whether the range (prescribed limit that by its target value on the basis of sets) of its target value is exceeded.
When being judged as beyond target range (when the judging result of S223 is "Yes"), S224 is entered step, it will be above-mentioned
Average value Ave obtains correction amount (the ETRT amendment of target conjugation grade multiplied by defined adjusted coefficient K DGT (for example, 0.005)
Amount), and store, then terminate the processing of this process.
On the other hand, be judged as in step S223 above-mentioned average value Ave without departing from its target value range (S223's
Judging result is "No") when, S225 is entered step, makes the correction amount 0 of ETRT and stores, then terminate this secondary control period
Flow processing.
In the essence in step S20, S21 in the processing and the 1st embodiment of step S224, S225 in 2nd embodiment
Hold identical, thus detailed description thereof is omitted.
In this 2nd embodiment, due to being the average value of the detected value of number according to the rules to determine whether amendment, is being repaired
The average value of detected value in the calculating of positive quantity using stipulated number is calculated, thus, it is possible to inhibit error detection bring shadow
It rings, improves detection accuracy.
<variation of the 3.3, the 2nd embodiment>
In the 2nd embodiment, after the average value Ave for the product for calculating stipulated number, make counter resets (S222),
However, it is also possible to make counter resets again after the completion of the calculating of step S224.
In addition, after accumulation stores the product value of stipulated number, counter resets are opened again in the 2nd embodiment
Begin to accumulate storage, however, it is also possible to when accumulation stores the product value and then secondary acquisition product value of stipulated number, by it
The initial primary product value obtained in the preceding control period is deleted, and increases the product value obtained in storage this secondary control period,
The quantity of the product value stored at this time is set to be still stipulated number.It so, it is possible promptly to be modified, improve control device
Responsiveness.
<4, variation>
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
For example, in the above-described embodiment, in the maximum difference and inconsistent time of practical driving force and theoretical driving force
Product when exceeding the range of target value, it is believed that the velocity shock (downshift impact) of vehicle is more than specified value, thus, calculate ETRT
The correction amount of (target conjugation grade), is modified ETRT；In range of the product without departing from target value, it is believed that vehicle
Velocity shock is not above specified value, is not modified (correction amount 0).It, can also be with however, the correction conditions as ETRT
It is when being more than defined threshold value either in the maximum difference and inconsistent time of practical driving force and theoretical driving force, into
Row amendment, when the two is all not above threshold value, without amendment, or only using the side in the two as condition to determine whether
It is modified.Specific modification method is identical as above embodiment.
In addition, the correction conditions as ETRT, judge that the speed change of vehicle is shaken according to practical driving force and theoretical driving force
Whether dynamic be more than specified value, however, it is also possible to be judged according to other vehicle status parameters.
Furthermore, it is possible to which the chart of relationship of the state and velocity shock that indicate vehicle is stored in advance in ECU6, (ETRT is repaired
Just use chart), using the chart, according to the car status information (above-mentioned practical driving force and theory driving force etc.) detected come
Obtain the velocity shock of vehicle.
In the above-described embodiment, it as next grade of theoretical driving force, has used and has been estimated according to gear ratio and engine torque
Presumed value out, however, the present invention is not limited thereto, for example, the value that can reach to practical driving force after stablizing is accumulated
Storage determines next grade of theoretical driving force in the control period later according to the value stored.
In addition, in the above-described embodiment, using the torque transmission shaft of vehicle as driving force, however, as driving force
Example is also possible to semiaxis torque (torque transmission shaft and semiaxis torque are corresponding to vehicle (wheel) the axis torque in the present invention) or vehicle
Fore-aft acceleration, in the latter case, the practical fore-aft acceleration of practical driving force measurement mechanism measurement vehicle, by it
As practical driving force, next grade of fore-aft acceleration of next grade of driving force estimating mechanism presumption vehicle, as next shelves
Theoretical driving force.At this point it is possible to which acceleration transducer is arranged to detect the fore-aft acceleration of vehicle.
In addition, in the above-described embodiment, what is used when calculating the correction amount of the target conjugation grade of lock-up clutch 23 repairs
Positive coefficient KDGT is preset steady state value, however, it is also possible to adjusted coefficient K DGT is determined according to above-mentioned average value Ave,
Such as adjusted coefficient K DGT can be determined according to preset chart.The chart can be according to the characteristic of fluid torque-converter
Or the setting such as driver's operating habit.
Claims (12)
1. a kind of control device of the lock-up clutch of fluid torque-converter,
The fluid torque-converter is used to connect the output shaft of the engine of vehicle and the input shaft of automatic transmission, has locking clutch
The input shaft and the output shaft can be mechanically directly connected to by device, the lock-up clutch,
When the vehicle is in regulation driving condition, the control device engages the lock-up clutch with defined target
Degree engagement,
It is characterized in that,
The control device includes
Decision mechanism is vibrated, is used to judge the degree of the velocity shock due to caused by downshift after downshift；
Engagement control mechanism therefor is used to control the conjugation grade of the lock-up clutch；
Conjugation grade correction amount calculates mechanism, carries out described in moment of torsion control period when being used to calculate downshift to automatic transmission
The correction amount of target conjugation grade,
The conjugation grade correction amount calculates mechanism and is repaired according to the judging result of the vibration decision mechanism to calculate target conjugation grade
Positive quantity.
2. the control device of the lock-up clutch of fluid torque-converter according to claim 1, which is characterized in that
The vibration decision mechanism obtains the mesh with chart from preset correction amount calculating according to the state of the vehicle
The right correction amount of tag splice, the correction amount calculate the state and the target conjugation grade correction amount for graphically illustrating the vehicle
Relationship.
3. the control device of the lock-up clutch of fluid torque-converter according to claim 1, which is characterized in that
The vibration decision mechanism includes
Next grade of driving force estimating mechanism deduces next grade of driving force according to current shelves gear ratio and actual engine torque；
Practical driving force measurement mechanism, measures practical driving force in real time,
The vibration decision mechanism judges the velocity shock according to the next grade of driving force and the practical driving force
Degree.
4. the control device of the lock-up clutch of fluid torque-converter according to claim 3, which is characterized in that
The vibration decision mechanism judges the degree of the velocity shock according to driving force convergence time,
The driving force convergence time refers to, when practical driving force initially reachs next grade of driving force to both within the specified scope
Time when consistent.
5. the control device of the lock-up clutch of fluid torque-converter according to claim 3, which is characterized in that
The maximum value and the practical driving that the vibration decision mechanism reaches in torque phase control according to the practical driving force
The difference of value when power reaches next grade of driving force, to judge the degree of the velocity shock.
6. the control device of the lock-up clutch of fluid torque-converter according to claim 1, which is characterized in that
The vibration decision mechanism includes
Next grade of fore-aft acceleration estimating mechanism deduces the vehicle according to current shelves gear ratio and actual engine torque
Next grade of fore-aft acceleration；
Practical fore-aft acceleration measurement mechanism measures the practical fore-aft acceleration of the vehicle,
The vibration decision mechanism judges the change according to the next grade of fore-aft acceleration and the practical fore-aft acceleration
The degree of speed vibration.
7. the control device of the lock-up clutch of fluid torque-converter according to claim 6, which is characterized in that
The vibration decision mechanism judges the degree of the velocity shock according to acceleration convergence time,
The acceleration convergence time refers to that the practical fore-aft acceleration arrives when initially reaching the next grade of fore-aft acceleration
Time when the two is consistent within the specified scope.
8. the control device of the lock-up clutch of fluid torque-converter according to claim 6, which is characterized in that
The maximum value and be somebody's turn to do that the vibration decision mechanism reaches in the torque phase control according to the practical fore-aft acceleration
The difference of value when practical fore-aft acceleration reaches the next grade of fore-aft acceleration, to judge the degree of the velocity shock.
9. the control device of the lock-up clutch of fluid torque-converter according to claim 1, which is characterized in that
The vibration decision mechanism includes
Next grade of axle torque estimating mechanism deduces under the vehicle according to current shelves gear ratio and actual engine torque
One grade of axle torque；
Practical axle torque measurement mechanism measures the practical axle torque of the vehicle,
The vibration decision mechanism judges the speed change vibration according to the next grade of axle torque and the practical axle torque
Dynamic degree.
10. the control device of the lock-up clutch of fluid torque-converter according to claim 9, which is characterized in that
The vibration decision mechanism judges the degree of the velocity shock according to axle torque convergence time,
The axle torque convergence time refers to, when the practical axle torque initially reachs the next grade of front and back axle torque
To time of the two when consistent within the specified scope.
11. the control device of the lock-up clutch of fluid torque-converter according to claim 9, which is characterized in that
The maximum value and the reality that the vibration decision mechanism reaches in the torque phase control according to the practical axle torque
The difference of value when border axle torque reaches the next grade of axle torque, to judge the degree of the velocity shock.
12. the control device of the lock-up clutch of fluid torque-converter according to any one of claims 1 to 5, feature
It is,
The conjugation grade correction amount calculates velocity shock degree obtained in the control period of stipulated number before mechanism calculates
Average value, correction factor is determined according to the average value, in this secondary control period, by the correction factor and preceding primary
The product of the velocity shock degree obtained in the period is controlled as the conjugation grade correction amount.
Priority Applications (1)
| 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 |
Applications Claiming Priority (1)
| 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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| CN107289123A CN107289123A (en) | 2017-10-24 |
| CN107289123B true CN107289123B (en) | 2019-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
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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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| 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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| JP4941139B2 (en) * | 2007-07-09 | 2012-05-30 | トヨタ自動車株式会社 | Control device for lock-up clutch |
| JP5031052B2 (en) * | 2010-03-16 | 2012-09-19 | ジヤトコ株式会社 | Control device for automatic transmission |
| DE102011088853B4 (en) * | 2011-12-16 | 2021-08-26 | Zf Friedrichshafen Ag | Method for controlling a converter clutch |
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