CN102829173A - Gear shifting control method of mechanical automatic transmission - Google Patents
Gear shifting control method of mechanical automatic transmission Download PDFInfo
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- CN102829173A CN102829173A CN2012103469322A CN201210346932A CN102829173A CN 102829173 A CN102829173 A CN 102829173A CN 2012103469322 A CN2012103469322 A CN 2012103469322A CN 201210346932 A CN201210346932 A CN 201210346932A CN 102829173 A CN102829173 A CN 102829173A
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- 230000005540 biological transmission Effects 0.000 title abstract description 10
- 230000007246 mechanism Effects 0.000 claims abstract description 18
- 230000001133 acceleration Effects 0.000 claims abstract description 10
- 230000008569 process Effects 0.000 claims description 17
- 230000009347 mechanical transmission Effects 0.000 claims description 8
- 230000004044 response Effects 0.000 abstract description 2
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- 238000000926 separation method Methods 0.000 description 7
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Abstract
The invention provides a gear shifting control method of a mechanical automatic transmission, which belongs to the technical field of automatic control of an automobile. The optimal dynamic or economical gear shifting operating point of an engine has been actually missed already even if gear shift is carried out when a vehicle meets the gear shifting condition as a result of mechanical delay of conventional mechanical automatic transmission during gear shift. The technical scheme provided by the invention is that the method comprises the steps of: calculating time from current start of operation to the gear shift point of the vehicle by current velocity and acceleration of the vehicle; comparing the time with the time of a clutch executing mechanism which travels freely; and controlling the clutch executing mechanism to travel freely in advance so that the clutch executing mechanism is in a standby state, therefore, the response time of a clutch is effectively shortened, and the economical efficiency and dynamic property of the vehicle are improved.
Description
Technical field
The invention belongs to automobile automatic control technology field, relate to a kind of gear-shifting control method of automatic mechanical transmission.
Background technique
In general; Automobile-used electric control mechanical type automatic speed variator is fixedly improved on the shaft type gear-shift transmission basis in dry friction clutch and traditional collection; It had both had hydraulic automatic speed variator self-shifting advantage, had kept the advantage that former manual transmission gear-driven efficiency is high, cost is low, simple in structure, be easy to make again.
Automatic transmission case has several gears and synchronizer, advances or retreats the gear ratio of desired transmission input shaft and output shaft to realize vehicle.When gearshift, need first cut-off clutch, withdraw from current gear, choosing shelves, gear shift, and then the combination of solenoidoperated cluthes.
As everyone knows, the gear shift of automobile plays crucial effects in the vehicle drive process, and convenience and travelling comfort when its performance quality and driver drive are closely related.The vehicle of being furnished with automatic transmission can carry out automaitc shfit according to the gear shift collection of illustrative plates.Two parameter gear shift with commonly used are example, and when the speed of a motor vehicle was complementary with throttle and gear shift collection of illustrative plates, automatic transmission was carried out gear shift, to satisfy perhaps Economy requirement of power character requirement.During gear shift, clutch separates earlier under the specific speed of a motor vehicle and throttle, moves back shelves, choosing shelves, engage a gear then, and last clutch carries out combination.Owing to there is mechanical delay,, vehicle carries out gear shift when satisfying shift condition, and can cause reality to miss best power character or the Economy gear shift operation point of motor.
Summary of the invention
To above-mentioned shortcoming, the present invention proposes a kind of shift control method that solenoidoperated cluthes actuator accomplishes free clearance that shifts to an earlier date, and its technological scheme is:
This method may further comprise the steps:
(1) detects the speed of a motor vehicle, vehicle acceleration in real time;
(2) calculate vehicle operating to the required time of shifting points, and compare the completion used time of free clearance with actuator;
(3) when satisfying actuator when getting into the armed state condition in advance, control executing mechanism is separated in advance, waits for that gearshift confirms.
(4) if gearshift is confirmed to accomplish and need gearshift, then carry out follow-up gearshift flow process.
Wherein, the time of the completion of actuator described in the said step (2) free clearance is fixed value known in the shift control method.
Further preferred, calculate vehicle operating in the step (2) and be: likening to vehicle operating of the difference of the current vehicle speed and the shifting points speed of a motor vehicle and current vehicle acceleration arrived the required time of shifting points to the method for shifting points needed time.
Further preferred, the gearshift collection of illustrative plates based on this vehicle in the step (2) is confirmed shifting points.
Further preferred, the middle actuator of step (3) gets into the armed state condition in advance and refers to: vehicle operating is less than or equal to the time of actuator's completion free clearance to the required time of shifting points.
The condition that the middle actuator of step (3) gets into armed state in advance also comprises: expect gear and require gear inequality.
Needing gearshift to refer in the step (4) requires gear different with current gear.
Follow-up gearshift flow process in the step (4) is the flow process behind the completion free clearance in the normal gearshift flow process.
The shift control method that the present invention proposes; Through detecting the signal of gear, the speed of a motor vehicle, accelerator pedal position, vehicle acceleration; Judge that through logic solenoidoperated cluthes actuator fulfils free clearance ahead of schedule, guarantees when gear shift request; Clutch actuating mechanism is ready, and reaches purpose quick, economic gear shift; Because clutch actuating mechanism is ready when the gearshift request, makes shifting points more near theoretical value, has improved the Economy and the power character of car load; Adopt the electronic controller TCU actuating mechanism controls method and the more perfect function of the electric control mechanical type automatic speed variator of technological scheme of the present invention.
Description of drawings
Fig. 1 is the gearshift procedure of electric control mechanical type automatic speed variator in the embodiment of the invention;
Fig. 2 is the gear shift control logic diagram of clutch in the embodiment of the invention.
Among Fig. 1:
t
1~ t
2: accomplish free clearance; t
2~ t
3: the sliding separation that rubs; t
3~ t
4: Separation;
t
4~ t
5: move back shelves; t
5~ t
6: the choosing shelves; t
6~ t
7: engage a gear;
t
7~ t
8: Separation; t
8~ t
9: the sliding combination that rubs; t
9~ t
10: accomplish free clearance.
Embodiment
The present invention be intended to solve automobile when gearshift because mechanical delay misses the problem of the best operation point of shifting gears, the shift control method that a kind of control executing mechanism is fulfiled free clearance ahead of schedule is proposed.Below in conjunction with accompanying drawing and specific embodiment technological scheme of the present invention is done further to explain.
Technological scheme of the present invention is following:
The present invention proposes a kind of shift control method of electric control mechanical type automatic speed variator.Before this method is implemented, can obtain clutch actuating mechanism according to the inherent characteristic of vehicle and accomplish the required time T ime_off_free of free clearance, this time is present in this controlling method as a definite value.The step of this controlling method is:
Step 2, calculate vehicle in real time and run to the required time of shifting points, and make comparisons with the time that clutch actuating mechanism is accomplished free clearance and needed from current working;
Step 3, when satisfying the clutch actuating mechanism operating conditions, in advance control executing mechanism is separated, and waits for that gearshift confirms;
Step 4, if gear confirm to be accomplished and is needed gearshift, then carry out follow-up gearshift flow process.
Calculating vehicle in the step 2 from the method that current working runs to the shifting points needed time is:
PredTime=（V
s–V
c）/a
In the formula: PredTime is that current working arrives the time that shift point needs;
V
sBe the gear shift speed of a motor vehicle;
V
cBe current vehicle speed;
A is the current vehicle acceleration.
Shifting points is confirmed through looking into the gearshift collection of illustrative plates, can is that shift-up point also can be to lower category a little.
The clutch actuating mechanism operating conditions is in the step 3: vehicle is less than or equal to the time T ime_off_free that actuator accomplishes free clearance according to the speed of a motor vehicle and the acceleration operation of current working to the required time PredTime of shifting points, and expects gear and require gear inequality.
Gear confirm to be accomplished and is needed gearshift in the step 4, and what refer to vehicle requires gear and current gear inequality, needs to shift gears; And follow-up gearshift flow process wherein refers to except clutch and accomplishes other processes of free clearance, comprises sliding separations that rub, thoroughly separates, moves back shelves, selects grade, the combination of engage a gear and clutch.
Following examples specifically are applied to this controlling method in the gear shift control logic of electric control mechanical type automatic speed variator.
Vehicle is in when operation, information such as the position of the electronic controller of electric control mechanical type automatic speed variator (back literary grace is with its english abbreviation form TCU) through acquisition gas pedals such as accelerator pedal position sensor, engine rotation speed sensor, clutch position sensor, choosing shelves actuator position transducer, gearshift actuator position transducers, engine speed, transmission output speed, gear level position.These information are the bases of carrying out the clutch gear-shift controlling method.
Shown in Figure 1 is the electric control mechanical type automatic speed variator shift process.Wherein each time period was respectively with the corresponding stage of its expression:
t
1~ t
2: accomplish free clearance; t
2~ t
3: the sliding separation that rubs; t
3~ t
4: thoroughly separate;
t
4~ t
5: move back shelves; t
5~ t
6: the choosing shelves; t
6~ t
7: engage a gear;
t
7~ t
8: eliminate free clearance; t
8~ t
9: the sliding combination that rubs; t
9~ t
10: accomplish free clearance.
Can find out that therefrom shift process comprises three parts: clutch separation, synchronizer operation and clutch combine, and these three parts comprise several stages again respectively, and each several part and stage thereof are followed successively by:
(1) separation of clutch: accomplish free clearance, slide to rub and separate and thoroughly separate;
(2) operation of synchronizer: move back shelves, choosing shelves and engage a gear;
(3) combination of clutch: eliminate free clearance, sliding combination and the completion free clearance of rubbing.
In traditional control method, speed changer moves with some gears, when needing new gear after the process logical operation of controller; After sending the gear request command; Clutch separates, treat that it thoroughly separates after, move back the operation of shelves, choosing shelves and engage a gear.After accomplishing the gear selection, thereby whole shift process is accomplished in the combination of carrying out clutch.
Shift control method of the present invention is dissolved in above-mentioned traditional control procedure, is made that clutch has been accomplished free clearance before the gear request.Clutch gear-shift control logic figure after the improvement is as shown in Figure 2, and concrete steps are:
(1) beginning;
(2) judge the expectation gear and require gear whether identical, if, then change step (3) over to, if not, then change step (4) over to;
(3) judge whether gearshift flag bit shif_start_flag equals 1, if, then change (11) over to, if not, then return step (1);
(4) calculate current working to the required operating time PredTime of shifting points, and change step (5) over to;
The method of calculating PredTime is: the difference of the current vehicle speed and the shifting points speed of a motor vehicle is divided by the current vehicle acceleration;
(5) judge whether current working is less than or equal to the time T ime_off_free that actuator accomplishes free clearance to the required operating time PredTime of shifting points, if change step (6) over to; If not, then return step (1);
(6) judge whether free clearance is accomplished, if then return step (1); If not, then change step (7) over to;
(7) apply the control electric current to motor, accomplish free clearance, change step (8) simultaneously over to solenoidoperated cluthes actuator;
(8) judge whether to accomplish gear and confirm, if then change step (9) over to; If not, then return step (1);
(9) judge current gear and require gear whether identical, if change step (1) over to; If not, then change step (10) over to
(10) gear opening flag shif_start_flag==1 is set, and changes step (11) over to;
(11) get into gear shift control.
The expectation gear is based on the gear that directly calculates of gearshift collection of illustrative plates, and requiring gear is that the expectation gear is confirmed and revised the definite object gear in back.
When the expectation gear equates with requiring gear, and the flag bit of shifting gears is set at 1 o'clock, then expects gear, requires gear and current gear three equal, and vehicle is in the state of cruising.
When the travelling state of vehicle changes, and will shift gears according to gearshift collection of illustrative plates vehicle the time, the expectation gear can change, and causes expecting gear and requires gear unequal.Therefore can expect gear and require gear whether to equate to judge whether vehicle will shift gears through judging, be i.e. step (2).
The concrete grammar that whether the gear affirmation is accomplished in the step (8) has multiple, as adopting timer, after after a while, the value of expectation gear is composed to requiring gear; Cross lowly and flame-out for fear of engine speed, the safe gear assignment that computation of table lookup is obtained is given and is required gear.The meaning that gear is confirmed is: when new gear demand is arranged, need the affirmation through timer time settings; Ignore or produced new gear request if gear shift has during this period of time taken place, then need reaffirm, gear shift opening flag position is not set.
Whether step (9) judge and to require gear identical with current gear, and whether in addition purpose is to judge under the current vehicle condition vehicle gearshift demand, if having then shift gears, if less than need not shift gears.
Variable declaration is following among this embodiment:
Shif_start_flag: gear shift opening flag position is 1 o'clock, shows to begin gear shift;
Time_off_free: clutch actuating mechanism is accomplished the used time of free clearance.
The electric control mechanical type automatic speed variator controlling method that the present invention proposes, after TCU powered on, each module of the control software that it is inner was started working.In the process of carrying out gear shift control; Control software has collected the state that rotating speed, throttle and gear signal can be judged speed changer according to the TCU acquisition system; And controlling method of the present invention is calculated in real time current vehicle condition and is run to the required time of shifting points, and the time ratio of accomplishing free clearance with clutch actuating mechanism, confirms the opportunity of clutch actuating mechanism control beginning; And the control motor begins pushing executing mechanism completion free clearance, entering wait state.This controlling method reaches and shortens the gearshift time through fulfiling the free clearance of clutch ahead of schedule, improves the purpose of speed of response.
Above-mentioned description to embodiment is can understand and use the present invention for ease of the those of ordinary skill of this technical field.The personnel of skilled obviously can easily make various modifications to the foregoing description, and needn't pass through performing creative labour being applied among other embodiments in the General Principle of this explanation.Therefore, the invention is not restricted to the embodiment here, those skilled in the art should be within protection scope of the present invention for improvement and modification that the present invention makes according to announcement of the present invention.
Claims (8)
1. the shift control method of an automatic mechanical transmission is characterized in that: said method comprising the steps of:
(1) detects the speed of a motor vehicle and vehicle acceleration in real time;
(2) calculate vehicle operating to the required time of shifting points, and compare the completion used time of free clearance with actuator;
(3) when satisfying actuator when getting into the armed state condition in advance, control executing mechanism is separated in advance, waits for that gearshift confirms;
(4) if gearshift is confirmed to accomplish and need gearshift, then carry out follow-up gearshift flow process.
2. the shift control method of automatic mechanical transmission according to claim 1 is characterized in that: the time that actuator described in the said step (2) accomplishes free clearance is fixed value known in the shift control method.
3. the shift control method of automatic mechanical transmission according to claim 1 is characterized in that: calculating vehicle operating in the said step (2) to the method for shifting points needed time is:
With the difference of the current vehicle speed and the shifting points speed of a motor vehicle and current vehicle acceleration liken to into vehicle operating to the required time of shifting points.
4. the shift control method of automatic mechanical transmission according to claim 1, it is characterized in that: the gearshift collection of illustrative plates according to this vehicle in the said step (2) is confirmed shifting points.
5. the shift control method of automatic mechanical transmission according to claim 1 is characterized in that: actuator gets into the armed state condition in advance and refers in the said step (3): vehicle operating is less than or equal to the time of actuator's completion free clearance to the required time of shifting points.
6. the shift control method of automatic mechanical transmission according to claim 1 is characterized in that: the condition that actuator gets into armed state in advance in the said step (3) also comprises: the expectation gear with require gear inequality.
7. the shift control method of automatic mechanical transmission according to claim 1 is characterized in that: needs are shifted gears to refer to and are required gear different with current gear in the said step (4).
8. the shift control method of electric control mechanical type automatic speed variator according to claim 1 is characterized in that: the follow-up gearshift flow process in the said step (4) is for accomplishing the flow process behind the free clearance in the normal gearshift flow process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210346932.2A CN102829173B (en) | 2012-09-18 | 2012-09-18 | A kind of mechanical automatic gearbox gear shifting controlling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210346932.2A CN102829173B (en) | 2012-09-18 | 2012-09-18 | A kind of mechanical automatic gearbox gear shifting controlling method |
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| Publication Number | Publication Date |
|---|---|
| CN102829173A true CN102829173A (en) | 2012-12-19 |
| CN102829173B CN102829173B (en) | 2015-08-19 |
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| CN201210346932.2A Expired - Fee Related CN102829173B (en) | 2012-09-18 | 2012-09-18 | A kind of mechanical automatic gearbox gear shifting controlling method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103291905A (en) * | 2013-01-18 | 2013-09-11 | 重庆青山工业有限责任公司 | Control method for gear pre-selection for dual clutch transmission |
| CN104724126A (en) * | 2013-12-20 | 2015-06-24 | 北汽福田汽车股份有限公司 | Vehicle operation remind control method |
| CN108843783A (en) * | 2018-08-01 | 2018-11-20 | 重庆长安汽车股份有限公司 | A kind of clutch for clutch control method when AMT transmission up-shift |
| CN109896471A (en) * | 2019-04-04 | 2019-06-18 | 杭叉集团股份有限公司 | A kind of fluid drive method and system |
| CN110985657A (en) * | 2019-12-17 | 2020-04-10 | 潍柴动力股份有限公司 | Gear shifting method and device of AMT (automated mechanical Transmission) |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103291905A (en) * | 2013-01-18 | 2013-09-11 | 重庆青山工业有限责任公司 | Control method for gear pre-selection for dual clutch transmission |
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| CN104724126A (en) * | 2013-12-20 | 2015-06-24 | 北汽福田汽车股份有限公司 | Vehicle operation remind control method |
| CN108843783A (en) * | 2018-08-01 | 2018-11-20 | 重庆长安汽车股份有限公司 | A kind of clutch for clutch control method when AMT transmission up-shift |
| CN108843783B (en) * | 2018-08-01 | 2020-05-08 | 重庆长安汽车股份有限公司 | Clutch control method for gear upshift of AMT (automated mechanical transmission) |
| CN109896471A (en) * | 2019-04-04 | 2019-06-18 | 杭叉集团股份有限公司 | A kind of fluid drive method and system |
| CN109896471B (en) * | 2019-04-04 | 2020-09-01 | 杭叉集团股份有限公司 | Automatic gear shifting method and system |
| CN110985657A (en) * | 2019-12-17 | 2020-04-10 | 潍柴动力股份有限公司 | Gear shifting method and device of AMT (automated mechanical Transmission) |
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| Publication number | Publication date |
|---|---|
| CN102829173B (en) | 2015-08-19 |
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Effective date of registration: 20190327 Address after: 317000 east gate of Taizhou City, Zhejiang Province Co-patentee after: ZHEJIANG GEELY HOLDING GROUP Co.,Ltd. Patentee after: ZHEJIANG GEELY AUTOMOBILE RESEARCH INSTITUTE Co.,Ltd. Address before: 311228 No. 206 Farmer's Second House in Linjiang Industrial Park, Xiaoshan District, Hangzhou City, Zhejiang Province Co-patentee before: ZHEJIANG GEELY AUTOMOBILE RESEARCH INSTITUTE Co.,Ltd. Patentee before: Zhejiang Geely Automobile Research Institute Co.,Ltd. Hangzhou Branch Co-patentee before: ZHEJIANG GEELY HOLDING GROUP Co.,Ltd. |
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