CN108275141A - The control method of mixed dynamic double clutch automatic speed changing case torque pre-control - Google Patents
The control method of mixed dynamic double clutch automatic speed changing case torque pre-control Download PDFInfo
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- CN108275141A CN108275141A CN201810111831.4A CN201810111831A CN108275141A CN 108275141 A CN108275141 A CN 108275141A CN 201810111831 A CN201810111831 A CN 201810111831A CN 108275141 A CN108275141 A CN 108275141A
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 235000013399 edible fruits Nutrition 0.000 claims description 3
- 230000001133 acceleration Effects 0.000 description 4
- 230000035939 shock Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/02—Conjoint control of vehicle sub-units of different type or different function including control of driveline clutches
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W20/00—Control systems specially adapted for hybrid vehicles
- B60W20/40—Controlling the engagement or disengagement of prime movers, e.g. for transition between prime movers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/06—Combustion engines, Gas turbines
- B60W2510/0657—Engine torque
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/02—Clutches
- B60W2710/027—Clutch torque
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
- Hybrid Electric Vehicles (AREA)
Abstract
The invention discloses a kind of control methods of mixed dynamic double clutch automatic speed changing case torque pre-control comprising sends out the instruction of torque pre-control to gearbox；Reduce clutch moment of torque in gearbox；Judge whether the difference of the expectation torque of clutch moment of torque and clutch is less than or equal to the first preset value；If so, the difference of clutch moment of torque and engine torque is kept to be constantly equal to preset difference value；Judge whether engine has been turned on completion or whether the instruction of torque pre-control has been cancelled；If so, obtaining the change rate of engine torque, and the growth slope of clutch moment of torque is obtained according to the difference and change rate of engine torque and clutch moment of torque；Increase clutch moment of torque according to slope is increased；Judge whether the absolute value of the difference of clutch moment of torque and engine torque is less than or equal to the second preset value；If so, terminating torque pre-control.The control method of mixed dynamic double clutch automatic speed changing case torque pre-control provided by the invention, engine torque can fast and effeciently be followed by realizing clutch moment of torque.
Description
Technical field
The present invention relates to automobile technical field more particularly to a kind of controls of mixed dynamic double clutch automatic speed changing case torque pre-control
Method.
Background technology
Demand with country more and more harsh oil consumption requirement and consumer to automobile power, hybrid electric vehicle
It is developed into the trend of major Automobile Enterprises development, while wet type double clutch automatic speed changing case (DCT) is carried to hybrid power
In vehicle, the requirement of national compulsory oil consumption can be met, while can also meet consumer and driver comfort, dynamic property are wanted
It asks.
Hybrid electric vehicle power source during driving at low speed, which can choose whether to connect according to practical driving situation, to be started
Machine, if starting engine in driving procedure, gearbox needs in advance prejudge torque, avoid clutch without selectively
It follows engine torque and causes to impact in start-up course larger, influence driver comfort.
When hybrid electric vehicle starts engine under transport condition, in order to make engine rapidly enter normal operation shape
State, the rotating speed and torque for inputting gearbox are more big changes in a short time.But speed change box clutch torque needs to carry out
Anticipation and the torque of engine cannot be followed directly after, after engine start, power output, gearbox is needed to need to be promoted in time
Clutch moment of torque ensures power output, on the one hand can assist electric motor starting engine, on the other hand ensures to start fore-aft vehicle
Drive ride comfort.
But in the prior art, after engine start, clutch moment of torque ascent stage is according in fixed slope
It rises, still, if the rate of rise is too small, clutch moment of torque can be caused to rise slower, engine torque can not transmit down at this time
It goes, leads to driving；If the rate of rise is excessive, clutch moment of torque can be caused to rise too fast, can exceed that input gearbox torque
And lead to later stage acceleration shock.
Invention content
The object of the present invention is to provide a kind of control methods of mixed dynamic double clutch automatic speed changing case torque pre-control, in solution
The problems of the prior art are stated, realizes that clutch moment of torque can fast and effeciently follow engine torque, avoids engine mounted longitudinally racing
With later stage acceleration shock phenomenon.
The present invention provides a kind of control methods of mixed dynamic double clutch automatic speed changing case torque pre-control, wherein including：
Step A, start engine, the instruction of torque pre-control is sent out to gearbox；
Step B, clutch moment of torque in gearbox is reduced；
Step C, it is default to judge whether the difference of the expectation torque of the clutch moment of torque and clutch is less than or equal to first
Value；If so, entering step D；If not, entering step B；
Step D, the difference of the clutch moment of torque and engine torque is kept to be constantly equal to preset difference value；
Step E, judge whether engine has been turned on completion or whether the instruction of torque pre-control has been cancelled；If so, entering step
Rapid F；If not, entering step D；
Step F, the change rate of the engine torque is obtained, and according to the engine torque and the clutch moment of torque
Difference and the change rate obtain the growth slope of the clutch moment of torque；
Step G, the clutch moment of torque is increased according to the growth slope；
Step H, judge whether the absolute value of the difference of the clutch moment of torque and the engine torque is less than or equal to the
Two preset values；If so, entering step I；If not, entering step F；
Step I, torque pre-control is terminated.
The control method of mixed dynamic double clutch automatic speed changing case torque pre-control as described above, wherein preferably, step C
It specifically includes：
Step C1, it is default to judge whether the difference of the expectation torque of the clutch moment of torque and clutch is less than or equal to first
Value；If so, entering step D；If not, entering step C2；
Step C2, judge whether the torque pre-control instruction has been forced to cancel；If so, entering step F；If not,
Enter step B.
The control method of mixed dynamic double clutch automatic speed changing case torque pre-control as described above, wherein preferably, step E
It specifically includes：
Step E1, judge whether engine has been turned on completion or whether the instruction of torque pre-control has been cancelled；If so, entering step
Rapid F；If not, entering step E2；
Step E2, judge whether the absolute value of the difference of clutch driving rotating speed and engine speed is default less than third
Value；If so, entering step E3；If not, entering step D；
Step E3, clutch slipping control is executed；
Step E4, the clutch moment of torque is reduced；
Step E5, it is default to judge whether the absolute value of the difference of clutch driving rotating speed and engine speed is more than the 4th
Value；If so, entering step D；If not, entering step E3.
The control method of mixed dynamic double clutch automatic speed changing case torque pre-control as described above, wherein preferably, step E4
Further include later：
Step e1, judge whether engine has been turned on completion or whether torque pre-control instruction has been cancelled；If so, into
Enter step F；If not, entering step E5.
The control method of mixed dynamic double clutch automatic speed changing case torque pre-control as described above, wherein preferably, step F
It specifically includes：
The change rate of the engine torque is obtained, and according to the difference of the engine torque and the clutch moment of torque
The growth slope of the clutch moment of torque is obtained by way of tabling look-up with the change rate.
The control method of mixed dynamic double clutch automatic speed changing case torque pre-control as described above, wherein preferably, in step
Further include before D：
Step d1, judge whether the clutch moment of torque and the difference of the engine torque are less than the preset difference value；
If so, entering step d2；If not, entering step B；
Step d2, increase the clutch moment of torque, until the difference etc. of the clutch moment of torque and the engine torque
In the preset difference value.
The control method of mixed dynamic double clutch automatic speed changing case torque pre-control as described above, wherein preferably, in step
Further include before A：
Step a1, vehicle power control unit judges whether to need to start engine according to current driving cycles；If so,
Enter step A.
The control method of mixed dynamic double clutch automatic speed changing case torque pre-control provided by the invention, realizes clutch moment of torque energy
It is enough fast and effeciently to follow engine torque, engine mounted longitudinally racing and later stage acceleration shock phenomenon are avoided, while also improving mould
The driver comfort of formula handoff procedure.
Description of the drawings
Specific embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.
Fig. 1 is the control method for the mixed dynamic double clutch automatic speed changing case torque pre-control that the first embodiment of the invention provides
Flow chart；
Fig. 2 is the control method for the mixed dynamic double clutch automatic speed changing case torque pre-control that second of embodiment of the invention provides
Flow chart；
Fig. 3 is the control method for the mixed dynamic double clutch automatic speed changing case torque pre-control that the third embodiment of the invention provides
Flow chart；
Fig. 4 is the control method for the mixed dynamic double clutch automatic speed changing case torque pre-control that the 4th kind of embodiment of the invention provides
Flow chart.
Specific implementation mode
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and is only used for explaining the present invention, and is not construed as limiting the claims.
As shown in Figure 1, an embodiment of the present invention provides a kind of controlling parties of mixed dynamic double clutch automatic speed changing case torque pre-control
Method comprising following steps：
Step A, start engine, the instruction of torque pre-control is sent out to gearbox.
Step B, clutch moment of torque in gearbox is reduced, i.e. clutch moment of torque enters the torque decline stage.
Step C, judge whether the difference of the expectation torque of clutch moment of torque and clutch is less than or equal to the first preset value；Such as
Fruit is to enter step D；If not, entering step B.
Step D, the difference of clutch moment of torque and engine torque is kept to be constantly equal to preset difference value, i.e. clutch moment of torque enters
Torque is kept for the stage.
Step E, judge whether engine has been turned on completion or whether the instruction of torque pre-control has been cancelled；If so, entering step
Rapid F；If not, entering step D.Wherein, after startup is completed in engine or cancels the instruction of torque pre-control, then it represents that torque is protected
The stage of holding terminates.
Step F, the change rate of engine torque is obtained, and according to the difference and variation of engine torque and clutch moment of torque
Rate obtains the growth slope of clutch moment of torque, i.e. clutch moment of torque initially enters torque ascent stage.
Wherein it is possible to understand, clutch moment of torque ascent stage rises according to fixed slope in the prior art, still,
If the rate of rise is too small, clutch moment of torque can be caused to rise slower, engine torque can not hand at this time, cause to fly
Vehicle；If the rate of rise is excessive, clutch moment of torque can be caused to rise too fast, can exceed that input gearbox torque and lead to the later stage
Acceleration shock.And in the present embodiment, clutch can be obtained according to the difference and change rate of engine torque and clutch moment of torque
The growth slope of device torque, and clutch moment of torque is increased according to the growth slope obtained in different moments, so as to for from
The incrementss of clutch torque provide optimum value, and realizing, which makes clutch moment of torque quickly follow, effectively follows engine torque, keeps away
Engine mounted longitudinally racing and later stage acceleration shock phenomenon are exempted from.
Step G, clutch moment of torque is increased according to growth slope.
Step H, judge whether the absolute value of the difference of clutch moment of torque and engine torque is less than or equal to the second preset value；
If so, entering step I；If not, entering step F.
Step I, torque pre-control is terminated.
It should be noted that can also include before step A：
Step a1, judge whether to need to start engine according to current driving cycles by vehicle power control unit；Such as
Fruit is to enter step A.After gearbox receives the torque pre-control instruction that vehicle power control unit (HVCU) is sent out, speed change
Case enters torque pre-control state according to states such as current throttle pedal, speed, gears.
Specifically, step F can specifically include：
The change rate of engine torque is obtained, and is passed through according to the difference and change rate of engine torque and clutch moment of torque
The mode tabled look-up obtains the growth slope of clutch moment of torque.
Further, as shown in Fig. 2, step C can also include specifically：
Step C1, judge whether the difference of the expectation torque of clutch moment of torque and clutch is less than or equal to the first preset value；
If so, entering step D；If not, entering step C2.
Step C2, judge whether the instruction of torque pre-control has been forced to cancel；If so, entering step F；If not, into
Step B.
Further, as shown in figure 3, step E can also include specifically：
Step E1, judge whether engine has been turned on completion or whether the instruction of torque pre-control has been cancelled；If so, entering step
Rapid F；If not, entering step E2.
Step E2, judge whether the absolute value of the difference of clutch driving rotating speed and engine speed is default less than third
Value；If so, entering step E3；D is entered step if not.
Step E3, clutch slipping control is executed, i.e. clutch moment of torque enters cunning and rubs the control stage.
Step E4, clutch moment of torque is reduced.
Step E5, it is default to judge whether the absolute value of the difference of clutch driving rotating speed and engine speed is more than the 4th
Value；If so, entering step D；If not, entering step E3.
Further, as shown in figure 4, can also include after step E4：
Step e1, judge whether engine has been turned on completion or whether the instruction of torque pre-control has been cancelled；If so, entering step
Rapid F；If not, entering step E5.
Further, can also include before step D：
Step d1, judge whether the difference of clutch moment of torque and engine torque is less than preset difference value；If so, entering step
Rapid d2；If not, entering step B.
Step d2, increase clutch moment of torque, until the difference of clutch moment of torque and engine torque is equal to preset difference value.
The control method of mixed dynamic double clutch automatic speed changing case torque pre-control provided in an embodiment of the present invention, realizes clutch
Torque can fast and effeciently follow engine torque, avoid engine mounted longitudinally racing and later stage acceleration shock phenomenon, while also carrying
The driver comfort of mode handover procedure is risen.
The structure, feature and effect of the present invention, the above institute are described in detail based on the embodiments shown in the drawings
Only presently preferred embodiments of the present invention is stated, but the present invention is not to limit practical range, every structure according to the present invention shown in drawing
Change made by thinking, or is revised as the equivalent embodiment of equivalent variations, when not going beyond the spirit of the description and the drawings,
It should all be within the scope of the present invention.
Claims (7)
1. a kind of control method of mixed dynamic double clutch automatic speed changing case torque pre-control, which is characterized in that including：
Step A, start engine, the instruction of torque pre-control is sent out to gearbox；
Step B, clutch moment of torque in gearbox is reduced；
Step C, judge whether the difference of the expectation torque of the clutch moment of torque and clutch is less than or equal to the first preset value；Such as
Fruit is to enter step D；If not, entering step B；
Step D, the difference of the clutch moment of torque and engine torque is kept to be constantly equal to preset difference value；
Step E, judge whether engine has been turned on completion or whether the instruction of torque pre-control has been cancelled；If so, entering step F；
If not, entering step D；
Step F, the change rate of the engine torque is obtained, and according to the difference of the engine torque and the clutch moment of torque
Value and the change rate obtain the growth slope of the clutch moment of torque；
Step G, the clutch moment of torque is increased according to the growth slope；
Step H, judge whether the absolute value of the clutch moment of torque and the difference of the engine torque is less than or equal to second in advance
If value；If so, entering step I；If not, entering step F；
Step I, torque pre-control is terminated.
2. the control method of mixed dynamic double clutch automatic speed changing case torque pre-control according to claim 1, which is characterized in that step
Rapid C is specifically included：
Step C1, judge whether the difference of the expectation torque of the clutch moment of torque and clutch is less than or equal to the first preset value；
If so, entering step D；If not, entering step C2；
Step C2, judge whether the torque pre-control instruction has been forced to cancel；If so, entering step F；If not, into
Step B.
3. the control method of mixed dynamic double clutch automatic speed changing case torque pre-control according to claim 2, which is characterized in that step
Rapid E is specifically included：
Step E1, judge whether engine has been turned on completion or whether the instruction of torque pre-control has been cancelled；If so, entering step F；
If not, entering step E2；
Step E2, judge that whether clutch drives the absolute value of the difference of rotating speed and engine speed less than third preset value；
If so, entering step E3；If not, entering step D；
Step E3, clutch slipping control is executed；
Step E4, the clutch moment of torque is reduced；
Step E5, judge that whether clutch drives the absolute value of the difference of rotating speed and engine speed more than the 4th preset value；
If so, entering step D；If not, entering step E3.
4. the control method of mixed dynamic double clutch automatic speed changing case torque pre-control according to claim 3, which is characterized in that step
Further include after rapid E4：
Step e1, judge whether engine has been turned on completion or whether torque pre-control instruction has been cancelled；If so, entering step
Rapid F；If not, entering step E5.
5. the control method of mixed dynamic double clutch automatic speed changing case torque pre-control according to claim 1, which is characterized in that step
Rapid F is specifically included：
The change rate of the engine torque is obtained, and according to the difference and institute of the engine torque and the clutch moment of torque
State the growth slope that change rate obtains the clutch moment of torque by way of tabling look-up.
6. the control method of mixed dynamic double clutch automatic speed changing case torque pre-control according to claim 1, which is characterized in that
Further include before step D：
Step d1, judge whether the clutch moment of torque and the difference of the engine torque are less than the preset difference value；If
It is to enter step d2；If not, entering step B；
Step d2, increase the clutch moment of torque, until the difference of the clutch moment of torque and the engine torque is equal to institute
State preset difference value.
7. the control method of mixed dynamic double clutch automatic speed changing case torque pre-control according to claim 1, which is characterized in that
Further include before step A：
Step a1, vehicle power control unit judges whether to need to start engine according to current driving cycles；If so, into
Step A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810111831.4A CN108275141B (en) | 2018-02-05 | 2018-02-05 | Control method for torque pre-control of hybrid double-clutch automatic gearbox |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810111831.4A CN108275141B (en) | 2018-02-05 | 2018-02-05 | Control method for torque pre-control of hybrid double-clutch automatic gearbox |
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| CN108275141A true CN108275141A (en) | 2018-07-13 |
| CN108275141B CN108275141B (en) | 2020-04-28 |
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Cited By (6)
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|---|---|---|---|---|
| CN109578577A (en) * | 2018-12-18 | 2019-04-05 | 安徽江淮汽车集团股份有限公司 | Wet dual-clutch automatic transmission torque follow-up control method |
| CN110185786A (en) * | 2019-04-11 | 2019-08-30 | 汉腾汽车有限公司 | A kind of algorithm for looking into torque gradient function by torque |
| CN110397730A (en) * | 2019-07-24 | 2019-11-01 | 重庆长安汽车股份有限公司 | A kind of control method that double-clutch automatic gearbox power downshift revolving speed is synchronous |
| CN110939730A (en) * | 2019-12-29 | 2020-03-31 | 盛瑞传动股份有限公司 | Control method of clutch in torque exchange stage of automatic gearbox |
| CN111002971A (en) * | 2019-12-30 | 2020-04-14 | 宁波吉利汽车研究开发有限公司 | Torque control method for starting clutch of engine of hybrid electric vehicle |
| CN112196995A (en) * | 2020-10-12 | 2021-01-08 | 安徽建筑大学 | Automatic gearbox torque pre-control and gear shifting coordination control method and device and automobile |
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| CN110397730A (en) * | 2019-07-24 | 2019-11-01 | 重庆长安汽车股份有限公司 | A kind of control method that double-clutch automatic gearbox power downshift revolving speed is synchronous |
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| CN110939730A (en) * | 2019-12-29 | 2020-03-31 | 盛瑞传动股份有限公司 | Control method of clutch in torque exchange stage of automatic gearbox |
| CN111002971A (en) * | 2019-12-30 | 2020-04-14 | 宁波吉利汽车研究开发有限公司 | Torque control method for starting clutch of engine of hybrid electric vehicle |
| CN112196995A (en) * | 2020-10-12 | 2021-01-08 | 安徽建筑大学 | Automatic gearbox torque pre-control and gear shifting coordination control method and device and automobile |
| CN112196995B (en) * | 2020-10-12 | 2021-09-17 | 安徽建筑大学 | Automatic gearbox torque pre-control and gear shifting coordination control method and device and automobile |
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| CN108275141B (en) | 2020-04-28 |
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