CN103438205B - A kind of clutch control method of vehicular automatic transmission and device - Google Patents
A kind of clutch control method of vehicular automatic transmission and device Download PDFInfo
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- CN103438205B CN103438205B CN201310334260.8A CN201310334260A CN103438205B CN 103438205 B CN103438205 B CN 103438205B CN 201310334260 A CN201310334260 A CN 201310334260A CN 103438205 B CN103438205 B CN 103438205B
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Abstract
The invention discloses a kind of clutch control method and device of vehicular automatic transmission, relate to the control field of the clutch of vehicular automatic transmission.Described method comprises parameters acquiring procedure, for obtaining the described one or more parameter in the described Brake System of described vehicle in the process of pilot control brake petal; First determination step, judged whether described one or more parameter reaches the first predetermined condition before being completely released at described brake petal, and described first predetermined condition is for representing that driver will discharge described brake petal and engage to make clutch; Engagement step, during for judging to reach described first predetermined condition in described first determination step, controlling described clutch and engaging from original state before described brake petal is completely released.This design vehicle can be started to walk in advance or driver step on brake petal rear vehicle from the process that low speed accelerates again time accelerate in advance, shorten starting or the time for acceleration of vehicle.
Description
Technical field
The present invention relates to the control field of the clutch of vehicular automatic transmission, especially a kind of clutch control method of vehicular automatic transmission and device.
Background technique
In prior art, most automatic transmission vehicle is when vehicle start, the joint of clutch is consistent with the OFF signal (signal sent when driver is totally released brake petal) of brake switch, namely when pin is linked into D shelves by driver, after being totally released brake petal, clutch just starts to engage, and such vehicle start response is slower.
If vehicle can judge the intention of driver, start the joint of clutch in advance, then can shorten start-up time, improve starting performance.This is for the vehicle pursuing power character, and driving will be more perfect.
Summary of the invention
The object of this invention is to provide a kind of clutch control method and device of vehicular automatic transmission, to reach the technique effect shortening the vehicle start time.
For reaching this object, the invention provides a kind of clutch control method of vehicular automatic transmission, the occasion being applicable to need driver to discharge brake petal and engaging to allow clutch, wherein, in the process of pilot control brake petal, the one or more parameter response in the Brake System of described vehicle in described brake petal motion and change; Further, when driver depresses brake petal completely, described clutch is in an original state;
Described clutch control method comprises:
Parameters acquiring procedure, in the process of pilot control brake petal, obtains the described one or more parameter in the described Brake System of described vehicle;
First determination step, before being completely released at described brake petal, judges whether described one or more parameter reaches the first predetermined condition, and described first predetermined condition is for representing that driver will discharge described brake petal and engage to make described clutch;
Engagement step, during for judging to reach described first predetermined condition in described first determination step, controlling described clutch and engaging from described original state before described brake petal is completely released.
Preferably, described one or more parameter is or comprises the pressure in the brake master cylinder in described Brake System.
Preferably, in described first determination step, the described pressure drop that described first predetermined condition comprises in described brake master cylinder enters threshold value to one; Wherein, enter threshold value described in and be greater than pressure in described brake master cylinder corresponding when described brake petal is completely released.
Preferably, the clutch control method of described vehicular automatic transmission also comprises compensation process, during for judging to reach described first predetermined condition in described first determination step, before described brake petal is completely released, the rotating speed of the motor of described vehicle and moment of torsion are compensated in advance.
Preferably, the clutch control method of described vehicular automatic transmission also comprises:
Second determination step, for judging after described engagement step whether described one or more parameter reaches the second predetermined condition, described second predetermined condition is for representing that driver abandons continuing the described brake petal of release and depressing described brake petal;
Separating step, during for judging to reach described second predetermined condition in described second determination step, controlling described clutch and returning to described original state from current state.
Preferably, the described pressure increase that described second predetermined condition comprises in described brake master cylinder exits threshold value to one; Wherein, exit described in threshold value be greater than described in enter threshold value.
Preferably, enter threshold value described in choose between 55bar to 65bar.
Preferably, exit threshold value described in choose between 75bar to 85bar.
The invention also discloses a kind of clutch control device of vehicular automatic transmission, the occasion being applicable to need driver to discharge brake petal and engaging to allow clutch, wherein, in the process of pilot control brake petal, the one or more parameter response in the Brake System of described vehicle in described brake petal motion and change; Further, when driver depresses brake petal completely, described clutch is in an original state; Described clutch control device comprises:
Parameter obtaining device, it is configured to the described one or more parameter obtained in the described Brake System of described vehicle;
Controller, it is configured to before described brake petal is completely released, and judges whether described one or more parameter reaches the first predetermined condition, and described first predetermined condition is for representing that driver will discharge described brake petal and engage to make described clutch; When described one or more parameter reaches described first predetermined condition, before described brake petal is completely released, controls described clutch engages from described original state.
Preferably, described one or more parameter is or comprises the pressure in the brake master cylinder in described Brake System; Wherein, described parameter obtaining device comprises brake master cylinder pressure transducer, for: obtain brake master cylinder pressure, and export brake master cylinder pressure signal;
Described controller comprises automatic transmission case control unit, for: receive brake master cylinder pressure signal, before described brake petal is completely released, judge whether described brake master cylinder pressure drops to one and enter threshold value, if, before described brake petal is completely released, then control described clutch engage from described original state, wherein, described in enter threshold value and be greater than pressure in described brake master cylinder corresponding when described brake petal is completely released.
Compared with prior art, the present invention at least has following technique effect:
1) according to the present invention, can in advance judge that driver will loosen the brake intention that clutch engaged when not being totally released by a predetermined condition (the first predetermined condition) at brake petal, and solenoidoperated cluthes engage in advance, thus vehicle can be started to walk in advance or driver step on brake petal rear vehicle from the process that low speed accelerates again time accelerate in advance, shorten starting or the time for acceleration of vehicle.
2) according to the present invention, almost synchronously can compensate in advance the rotating speed of motor and moment of torsion when clutch engages in advance, this avoid and make motor because rotating speed is too low, shake may be produced, the generation of even flame-out situation because clutch engages in advance.Meanwhile, this also improves smooth and easy and travelling comfort when vehicle start, improves driving experience.
3) according to the present invention, a predetermined condition (the second predetermined condition) can be passed through and judge that driver abandons continuing release brake petal.Further, by setting the first predetermined condition and the second predetermined condition rightly, can driver step on frequently and loosen the brake (as traffic congestion time) time, avoid the pressure between the platen of clutch and friction plate pressure release and pressurization between frequent switching.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to technological means of the present invention can be better understood, and can be implemented according to the content of specification, and can become apparent to allow above and other objects of the present invention, feature and advantage, below especially exemplified by the specific embodiment of the present invention, and coordinate accompanying drawing, be described in detail as follows.
Accompanying drawing explanation
Fig. 1 is the flow chart of an embodiment of the clutch control method of vehicular automatic transmission of the present invention;
The change curve of lever position when Fig. 2 is the vehicle start of an embodiment of the clutch control method of vehicular automatic transmission of the present invention, engine speed, clutch pressure, brake switch signal, brake master cylinder pressure, the speed of a motor vehicle;
Fig. 3 is the flow chart of another embodiment of the clutch control method of vehicular automatic transmission of the present invention;
Fig. 4 is the structural representation of an embodiment of the clutch control device of vehicular automatic transmission of the present invention.
Description of reference numerals is as follows:
First curve 210 second curve 220
3rd curve 230 the 4th curve 240
The engaging time 251 in advance of the 5th curve 250 clutch
6th curve 260 vehicle shifts to an earlier date start-up time 261
7th curve 270 the 8th curve 280
Zigzag line 290 brake master cylinder pressure transducer 401
Engine rotation speed sensor 402 body electronics stable system 403
Engine electronic control unit 404 automatic transmission case control unit 405
CAN 406 clutch 407
Closure 408 ignition system 409
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.
For some automatic transmission, when vehicle start or in the running process of vehicle, when clutch engages from disengaged condition, need detect and obtain current brake switch signal.Only have and loosen the brake in other words when driver discharges completely, when sending " OFF (pass) " signal to make the brake switch of vehicle, just allow clutch to start to engage.The same or analogous this control strategy to clutch is had in all non-fluid torque converter formula automatic transmission such as existing AT, DCT, CVT, AMT.The clutch control method of vehicular automatic transmission of the present invention then goes for this driver of needs and discharges the occasion that brake petal engages to allow clutch, and makes improvements.
Hereinafter, the brake switch that the state of mentioned brake petal " discharging completely " can be understood as corresponding to aforesaid vehicle sends the state that " OFF (pass) " Signal plan moves pedal.The state of clutch when " original state " of hereafter mentioned clutch refers to that driver depresses brake petal completely, according to the different travelling state residing for the setting of different vehicles or vehicle, it can be the state that clutch is separated completely, can be the state that clutch is in semi-linkage point.
Fig. 1 is the flow chart of an embodiment of the clutch control method of vehicular automatic transmission of the present invention.
In the embodiment illustrated in fig. 1, the clutch control method of vehicular automatic transmission of the present invention can comprise the steps:
Parameters acquiring procedure 101, in the process of pilot control brake petal, obtains in the Brake System of described vehicle the one or more parameters changed in response to the motion of this brake petal;
First determination step 102, before being completely released at described brake petal, judge whether described one or more parameter reaches the first predetermined condition, described first predetermined condition is for representing that driver will discharge described brake petal completely and engage to make clutch;
Engagement step 103, during for judging to reach described first predetermined condition in described first determination step, controlling described clutch and engaging from described original state before described brake petal is completely released.As previously mentioned, this original state can be the complete separated state of clutch, also can be the semi-linkage state of clutch.
This method make vehicle brake petal in the state be not totally released time, clutch can start in advance engage.Like this, vehicle can start to walk in advance or driver step on brake petal rear vehicle from the process that low speed accelerates again time accelerate in advance, shorten starting or the time for acceleration of vehicle.
In one embodiment of the invention, described one or more parameter is or comprises the pressure in the brake master cylinder in described Brake System.When driver's pressure or release brake petal, the pressure (being generally the hydraulic pressure of brake fluid) of the working medium in brake master cylinder can change along with the motion of brake petal.In one embodiment of the invention, in described first determination step, the described pressure drop that described first predetermined condition comprises in described brake master cylinder enters threshold value to one; Wherein, enter threshold value described in and be greater than pressure in described brake master cylinder corresponding when described brake petal is completely released.Such as, when vehicle start, or when again loosening the brake with accelerating vehicle after driver steps on the brake petal reduction speed of a motor vehicle in vehicle travel process, driver is unclamped gradually from stepping on brake petal completely, and the pressure in brake master cylinder then declines gradually from pressure maximum.When this pressure drop to set enter threshold value time, then judge that driver has the described brake petal of release to make clutch engage and thus to make the intention of vehicle start or acceleration.Be appreciated that, because the set threshold value that enters is greater than pressure in brake master cylinder corresponding when brake petal is completely released, therefore, discharge in the process of brake petal driver, pressure in brake master cylinder can (namely before the brake switch of vehicle sends " OFF " signal) reach this and enters threshold value before brake petal is completely released, and made clutch start to engage.This design makes vehicle when starting to walk or accelerating from low speed, just can start engaging clutch, thus make vehicle to start to walk in advance or to accelerate, shorten the response time of vehicle, improve driving experience when brake petal is not totally released.
In another embodiment of the present invention, the clutch control method of described vehicular automatic transmission also comprises compensation process, during for judging to reach described first predetermined condition in described first determination step, before described brake petal is completely released, the rotating speed of the motor of vehicle and moment of torsion are compensated in advance.Described rotating speed and torque compensation can for increasing ignition advance angle and/or increasing throttle opening.This is mainly completed by the control of engine electronic control unit to ignition system and closure.During owing to starting to engage at clutch, along with the increase of clutch pressure, engine loading also can increase thereupon, and engine speed will be dragged down.Owing to will start to engage in advance according to clutch of the present invention, therefore, utilize this compensation process, while clutch starts to engage in advance, also can be carried out the compensation of rotating speed and moment of torsion by adjustment throttle opening and increase ignition advance angle.Doing so avoids motor because rotating speed is too low, produce shake, the generation of even flame-out situation.
In another embodiment of the present invention, the clutch control method of described vehicular automatic transmission also comprises:
Second determination step, for judging after described engagement step 103 whether described one or more parameter reaches the second predetermined condition, described second predetermined condition is for representing that driver abandons continuing the described brake petal of release and depressing described brake petal;
Separating step, during for judging to reach described second predetermined condition in described second determination step, controlling described clutch and returning to described original state from current state.
In one embodiment of the invention, the described pressure increase that described second predetermined condition comprises in described brake master cylinder exits threshold value to one; Wherein, exit described in threshold value be greater than described in enter threshold value.Preferably, enter threshold value described in choose between 55bar to 65bar.Preferably, exit threshold value described in choose between 75bar to 85bar.
As can be seen from above-mentioned numerical value, enter threshold value and be less than and exit threshold value, to make to be separated by between them certain value, such as 20bar.When driver steps on and loosen the brake (time as traffic congestion) frequently, brake master cylinder pressure likely can frequently when entering near threshold and switching, if enter threshold value and to exit threshold value equal, then the platen of clutch and friction plate can frequently engage and disconnect, and this frequent switching is returned affect riding comfort and reduction speed changer working life.Above-mentioned design makes to be reduced to below threshold values at brake master cylinder pressure and makes clutch start in engaging process, when driver steps on brake petal again, need to make in brake master cylinder rise to a ratio enter threshold value high exit threshold value time, just make clutch start to be separated toward its original state.Like this, the platen of clutch can not frequently engage with friction plate and disconnect, and avoids the frequent switching of pressure between pressure release and pressurization between the platen of clutch and friction plate.
In another embodiment of the present invention, also the motion of brake petal can directly be measured, and the parameter of will carry out required for such as brake petal displacement or brake petal rotation angle are in the first and/or second determination step judging, with the pressure of the brake master cylinder in alternative previous embodiment.Under these circumstances, in the mode similar to the pressure of brake master cylinder, entering threshold value and exiting threshold value in the first predetermined condition and/or the second predetermined condition can be set for brake petal displacement or brake petal rotation angle.
The change curve of lever position when Fig. 2 is the vehicle start of an embodiment of the clutch control method of vehicular automatic transmission of the present invention, engine speed, clutch pressure, brake switch signal, brake master cylinder pressure, the speed of a motor vehicle.In fig. 2, also represented by dashed line go out the change curve of method conventionally engine speed, clutch pressure and speed of a motor vehicle in Vehicle Starting Process, to compare with method of the present invention.In the change curve shown in Fig. 2, transverse axis is time shaft T.
For the first curve 210, expression be vehicle start time lever change in location.Before time point t1, lever is in P shelves or N shelves; After time point t1, vehicle is in D shelves or R shelves.
For the 3rd curve 230, expression to be driver unclamp gradually after extension D shelves or R shelves from time point t2 discharges brake master cylinder pressure signal change in brake petal process in other words.Such as, before time point t2, pressure can be 100bar, and at time point t3, pressure drop is 60bar, and at time point t4, pressure drop is 0bar.
For the second curve 220, expression be the signal intensity of brake switch.Before time point t4, be in ON state; When putting t4 the time of advent, as shown in the 3rd curve 230, the pressure in brake master cylinder is 0, and represent that brake petal is completely released, now the signal of brake switch changes to OFF state.
For the 5th curve 250, what represent is according to the clutch pressure change under clutch of the present invention in advance joint situation, wherein from the 3rd curve 230 brake master cylinder pressure drop to 60bar time point t3, clutch just start engage, clutch pressure rises from 0bar.For as the 8th curve 280 compared, expression be that in prior art, clutch just starts to engage from the time point t4 that brake petal is totally released.Visible, compared to prior art, according to method of the present invention, the engaging time 251 in advance of clutch is the time lag between time point t4 and t3.
For the 4th curve 240, expression be motor rotation speed change when engaging in advance according to the inventive method clutch.Visible, when clutch engages from time point t3, engine speed also promotes simultaneously from time point t3, to compensate the trend dragging down engine speed because engine loading increases.For as the 7th curve 270 compared, expression be that in prior art, engine speed is the rising of just compensating property from time point t4.
For the 6th curve 260, expression be the speed of a motor vehicle change of clutch of the present invention in advance in joint situation; For zigzag line 290 as a comparison, expression be in prior art brake petal be totally released rear clutch just start engage when the speed of a motor vehicle change.Visible, in the prior art, the speed of a motor vehicle of vehicle starts to start from scratch at time point t6 and increases gradually.And in the present invention, because clutch engages in advance, therefore the speed of a motor vehicle of vehicle can just start to increase gradually from zero by a time point t5 before time point t6, to realize starting.Therefore, according to method of the present invention, it is time lag between time point t6 and t5 that vehicle shifts to an earlier date start-up time 261.。
The specific works process of an embodiment of the clutch control method of vehicular automatic transmission of the present invention is described below in conjunction with Fig. 2 and Fig. 4.
During vehicle start, gear is in P shelves or N shelves, bottom brake petal is stepped on by driver, and ato unit.Then, in the t1 moment, pin is linked into D shelves or R shelves by driver.
Then, driver starts loose brake petal in the t2 moment, brake master cylinder pressure starts to decline as shown in the 3rd curve 230, and control unit for automatic shift 405 gathers brake master cylinder pressure signal from CAN 406, calculates its variance ratio (can calculate variance ratio by unit time interpolation etc.).At moment t3, brake master cylinder pressure drop is to as the 60bar entering threshold value, and now as can be seen from the 5th curve 250, at moment t3, under the control of automatic transmission case control unit 405, clutch pressure starts to increase by 0 to engage.Now, along with the increase of clutch pressure when clutch 407 engages, engine loading also can increase, and engine speed will have by the trend dragged down.Therefore, engine electronic control unit 404 also needs, according to brake master cylinder pressure signal and variance ratio thereof, from moment t3, to carry out rotating speed and torque compensation in time, as shown in the 4th curve 240.If do not carry out rotating speed and torque compensation, motor because rotating speed is too low, can produce shake, even flame-out.
Finally, driver is totally released brake petal, and vehicle is started to walk at short notice.As can be seen from the 6th curve 260 and zigzag line 290, relative to prior art, the present invention has a vehicle to shift to an earlier date start-up time 261.
In the present embodiment, brake master cylinder pressure signal is when 60bar, and clutch 407 starts to engage, and now 60bar is for entering threshold value.In other embodiments of the invention, clutch 407 can engage when other threshold values, as the arbitrary value between 55bar to 65bar.
In the present embodiment, brake master cylinder pressure is by maximum continuous decrease to 0, and namely brake petal is totally released by flooring to.In other embodiments of the invention, drop in the process of 60bar (or other threshold values) at brake master cylinder pressure by maximum, not necessarily continuous decrease.As when with 60bar for entering threshold value, brake master cylinder pressure can for dropping to 70bar by maximum value, rise to 75bar, drop to 60bar again, now clutch 407 still can engage when 60bar.
In the embodiment described in Fig. 2, vehicle start refers to vehicle with different gear (one grade, second gear, reverse gear), starts to walk from static.
In another embodiment of the present invention, said process is also adapted to vehicle and loosens the brake when low speed driving, carries out the process accelerated.Such as, driver steps on brake petal, and after the speed of a motor vehicle drops to smaller value, driver loosens the brake and again accelerates.
Fig. 3 is the flow chart of another embodiment of the clutch control method of vehicular automatic transmission of the present invention;
In the embodiment described in figure 3, vehicle start to walk by static or by driver step on loosen the brake after the speed of a motor vehicle is dropped to smaller value by brake petal time starting, step is as follows successively:
Step 301, obtains brake master cylinder pressure and engine speed, transmits brake master cylinder pressure signal and tach signal;
It should be noted that, be used as to determine whether to reach the first predetermined condition and the second predetermined condition (entering threshold value for reaching in the present embodiment, exiting threshold value) in the brake master cylinder pressure of this step step below, brake master cylinder pressure and rotating speed are respectively used to calculate respective variance ratio and carry out rotating speed and torque compensation according to variance ratio;
Step 302, receives described brake master cylinder pressure signal, judges whether brake master cylinder pressure enters threshold value for dropping to, and if not, then flow process terminates, and if so, then the platen of solenoidoperated cluthes 407 engages from original state with friction plate;
Step 303, the pressure increased between described platen and described friction plate along with the reduction of brake master cylinder pressure, and carry out rotating speed and torque compensation according to brake master cylinder pressure change rate and tach signal;
Can find out, when step 302 clutch 407 start engage, in step 303, along with brake petal loosen the clutch gradually 407 degree of engagement increase gradually, when being totally released to brake petal, clutch 407 engages completely.
Step 304, judges whether brake master cylinder pressure increases, and if not, continues step 303, if so, judges whether brake master cylinder pressure exceedes and exit threshold value; If not, then keep engaging between described platen with described friction plate, and carry out rotating speed and torque compensation according to brake master cylinder pressure change rate and tach signal; If so, solenoidoperated cluthes 407 return to original state from current state.
Step 304 is the processes depressed again in the process of unclamping for brake petal, if be pressed down to certain degree (be reflected as brake master cylinder pressure exceed exit threshold value), then controlled described clutch 407 and returns to described original state from current state.Described original state can disconnect or half joint for clutch 407 according to different situations.
In another embodiment of the present invention, step 304 is applicable to driver in vehicle travel process and steps on brake petal and the process of not flooring.
The invention also discloses a kind of clutch control device of vehicular automatic transmission, the occasion being applicable to need driver to discharge brake petal and engaging to allow clutch 407, comprising:
Parameter obtaining device, for: obtain the described one or more parameter in the described Brake System of described vehicle;
Controller, for: before being completely released at described brake petal, judge whether described one or more parameter reaches the first predetermined condition, described first predetermined condition is for representing that driver will discharge described brake petal completely; When described one or more parameter reaches described first predetermined condition, before described brake petal is completely released, controls described clutch 407 engages from described original state.
Fig. 4 is the structural representation of an embodiment of the clutch control device of vehicular automatic transmission of the present invention.In the embodiment described in Fig. 4, described parameter obtaining device comprises brake master cylinder pressure transducer, for: obtain brake master cylinder pressure, and export brake master cylinder pressure signal; Described controller comprises automatic transmission case control unit, for: receive brake master cylinder pressure signal, before described brake petal is completely released, judge whether described brake master cylinder pressure drops to one and enter threshold value, if, before described brake petal is completely released, then control described clutch 407 engage from described original state, wherein, described in enter threshold value and be greater than pressure in described brake master cylinder corresponding when described brake petal is completely released.
Engine electronic control unit 404, compensated the rotating speed of the motor of described vehicle and moment of torsion before described brake petal is completely released to when entering threshold value in advance at described brake master cylinder pressure drop.The control of engine electronic control unit 404 pairs of closures 408 and ignition system 409 is mainly passed through in described compensation, shows as and increases ignition advance angle and increase throttle opening.
Described brake master cylinder pressure transducer 401 in the present embodiment, for being equipped with ESP(body electronics stable system) vehicle of 403, due to the constituent element that brake master cylinder pressure transducer 401 is ESP systems, can by ESP(body electronics stable system) 403 pressure gathering brake master cylinders, be converted into brake master cylinder pressure signal and be sent to CAN 406, without the need to increasing new hardware; And to there is no the vehicle of ESP, then need to install brake master cylinder pressure transducer 401 additional, can by BCM(vehicle body control unit) etc. control unit collection, process and be sent to CAN 406, for TCU(automatic transmission case control unit) 405 and engine electronic control unit 404.
Above by reference to the accompanying drawings to invention has been exemplary description; obvious specific implementation of the present invention is not subject to the restrictions described above; as long as have employed the various improvement that method of the present invention is conceived and technological scheme is carried out; or directly apply to other occasion, all within protection scope of the present invention without improving.
Claims (12)
1. the clutch control method of a vehicular automatic transmission, the occasion being applicable to need driver to discharge brake petal and engaging to allow clutch, wherein, in the process of pilot control brake petal, the one or more parameter response in the Brake System of described vehicle in described brake petal motion and change; Further, when driver depresses brake petal completely, described clutch is in an original state;
It is characterized in that, described clutch control method comprises:
Parameters acquiring procedure (101), in the process of pilot control brake petal, obtains the described one or more parameter in the described Brake System of described vehicle;
First determination step (102), before being completely released at described brake petal, judge whether described one or more parameter reaches the first predetermined condition, described first predetermined condition is for representing that driver will discharge described brake petal and engage to make described clutch;
Engagement step (103), during for judging to reach described first predetermined condition in described first determination step, controlling described clutch and engaging from described original state before described brake petal is completely released.
2. the clutch control method of vehicular automatic transmission according to claim 1, is characterized in that, described one or more parameter is or comprises the pressure in the brake master cylinder in described Brake System.
3. the clutch control method of vehicular automatic transmission according to claim 2, is characterized in that, in described first determination step, the described pressure drop that described first predetermined condition comprises in described brake master cylinder enters threshold value to one; Wherein, enter threshold value described in and be greater than pressure in described brake master cylinder corresponding when described brake petal is completely released.
4. the clutch control method of the vehicular automatic transmission according to any one of claim 1-3, it is characterized in that, also comprise compensation process, during for judging to reach described first predetermined condition in described first determination step, before described brake petal is completely released, the rotating speed of the motor of described vehicle and moment of torsion are compensated in advance.
5. the clutch control method of vehicular automatic transmission according to claim 1, is characterized in that, also comprises:
Second determination step, for judging after described engagement step whether described one or more parameter reaches the second predetermined condition, described second predetermined condition is for representing that driver abandons continuing the described brake petal of release and depressing described brake petal;
Separating step, during for judging to reach described second predetermined condition in described second determination step, controlling described clutch and returning to described original state from current state.
6. the clutch control method of vehicular automatic transmission according to claim 3, is characterized in that, also comprises:
Second determination step, for judging after described engagement step whether described one or more parameter reaches the second predetermined condition, described second predetermined condition is for representing that driver abandons continuing the described brake petal of release and depressing described brake petal;
Separating step, during for judging to reach described second predetermined condition in described second determination step, controlling described clutch and returning to described original state from current state.
7. the clutch control method of vehicular automatic transmission according to claim 6, is characterized in that, the described pressure increase that described second predetermined condition comprises in described brake master cylinder exits threshold value to one; Wherein, exit described in threshold value be greater than described in enter threshold value.
8. the clutch control method of vehicular automatic transmission according to claim 3, is characterized in that, described in enter threshold value and choose between 55bar to 65bar.
9. the clutch control method of vehicular automatic transmission according to claim 7, is characterized in that, described in enter threshold value and choose between 55bar to 65bar.
10. the clutch control method of the vehicular automatic transmission according to claim 7 or 9, is characterized in that, described in exit threshold value and choose between 75bar to 85bar.
The clutch control device of 11. 1 kinds of vehicular automatic transmissions, the occasion being applicable to need driver to discharge brake petal and engaging to allow clutch (407), wherein, in the process of pilot control brake petal, the one or more parameter response in the Brake System of described vehicle in described brake petal motion and change; Further, when driver depresses brake petal completely, described clutch is in an original state; It is characterized in that, described clutch control device comprises:
Parameter obtaining device, it is configured to the described one or more parameter obtained in the described Brake System of described vehicle;
Controller, it is configured to before described brake petal is completely released, and judges whether described one or more parameter reaches the first predetermined condition, and described first predetermined condition is for representing that driver will discharge described brake petal and engage to make described clutch; When described one or more parameter reaches described first predetermined condition, before described brake petal is completely released, controls described clutch engages from described original state.
The clutch control device of 12. vehicular automatic transmissions according to claim 11, is characterized in that, described one or more parameter is or comprises the pressure in the brake master cylinder in described Brake System; Wherein, described parameter obtaining device comprises brake master cylinder pressure transducer (402), for: obtain brake master cylinder pressure, and export brake master cylinder pressure signal;
Described controller comprises automatic transmission case control unit, for: receive brake master cylinder pressure signal, before described brake petal is completely released, judge whether described brake master cylinder pressure drops to one and enter threshold value, if, before described brake petal is completely released, then control described clutch engage from described original state, wherein, described in enter threshold value and be greater than pressure in described brake master cylinder corresponding when described brake petal is completely released.
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| CN201310334260.8A CN103438205B (en) | 2013-08-02 | 2013-08-02 | A kind of clutch control method of vehicular automatic transmission and device |
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| WO2016095941A1 (en) * | 2014-12-19 | 2016-06-23 | Volvo Truck Corporation | Method and device for operating a powertrain of a motor vehicle |
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| CN105952885B (en) * | 2016-06-16 | 2020-06-05 | 厦门雅迅网络股份有限公司 | Automatic identification method for vehicle clutch signal |
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