CN106895142B - Gear box control unit and its shift fork and clutch cooperative control method - Google Patents
Gear box control unit and its shift fork and clutch cooperative control method Download PDFInfo
- Publication number
- CN106895142B CN106895142B CN201510960887.3A CN201510960887A CN106895142B CN 106895142 B CN106895142 B CN 106895142B CN 201510960887 A CN201510960887 A CN 201510960887A CN 106895142 B CN106895142 B CN 106895142B
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- Prior art keywords
- clutch
- shelves
- pressure
- rubbing
- selector fork
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Classifications
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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
- F16H61/04—Smoothing ratio shift
- F16H61/0437—Smoothing ratio shift by using electrical signals
-
- 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
- F16H61/04—Smoothing ratio shift
- F16H2061/0459—Smoothing ratio shift using map for shift parameters, e.g. shift time, slip or pressure gradient, for performing controlled shift transition and adapting shift parameters by learning
-
- 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
- F16H2306/00—Shifting
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
Abstract
Gear box control unit and its shift fork and clutch cooperative control method, the described method includes: when determining vehicle is in low speed slide downshift operating condition, and when detecting that selector fork starts to hang shelves, the pressure of clutch in sliding state of rubbing is increased into preset pressure value, until the selector fork is hung shelves and terminated；At the end of determining that the selector fork hangs shelves, the control clutch pressure in sliding state of rubbing restores to the selector fork to start to hang pressure when shelves.Above-mentioned scheme can eliminate the vibration noise that clutch shafting is generated by load sudden change, improve the comfort of driving.
Description
Technical field
The invention belongs to automobile technical fields, assist more particularly to a kind of gear box control unit and its shift fork and clutch
Same control method.
Background technique
The basic function of automotive transmission is that the power for generating automobile engine passes to wheel.In automotive transmission
In development process, fluid drive is always the target that people pursue.As computer technology is in the extensive use of automotive field, certainly
Dynamic transmission technology has obtained quick development.In today that car becomes increasingly popular, the application of automatic gearbox has more
Important meaning.Double-clutch automatic transmission is the automatic transmission of a new generation.It inherits manual transmission transmission effect
The advantages that rate is high, compact-sized, light-weight, cheap, starting and shift quality are excellent, have good development prospect.
The automobile of double-clutch automatic transmission is loaded, odd gear is together with a clutch coupling, even gear
Position is together with another clutch coupling.Selector fork is in file location, and clutch is combined, and imparts power to phase
The shift synchronizer answered, corresponding synchronizer of shifting gears will push the driving gear of corresponding gear and driven gear is engaged and rotated,
To continue to transmit power, so that vehicle brings into operation.
But the automobile of double-clutch automatic transmission is loaded when in low speed slide downshift operating condition, clutch shaft
System can be generated vibration due to load sudden change and be easy to produce vibration noise, to affect the comfort of driving.
Summary of the invention
The technical issues of embodiment of the present invention solves is the vibration noise eliminating clutch shafting and generating by load sudden change,
Improve the comfort driven.
To solve the above problems, the embodiment of the invention provides a kind of shift fork and clutch cooperative control method, the side
Method includes:
When determine vehicle be in low speed slide downshift operating condition, and detect selector fork start hang shelves when, will in cunning rub
The pressure of the clutch of state increases to preset pressure value, until the selector fork is hung shelves and terminated；
At the end of determining that the selector fork hangs shelves, the control clutch pressure in sliding state of rubbing restores to institute
State pressure when selector fork starts to hang shelves.
Optionally, the pressure by the clutch in sliding state of rubbing increases to preset pressure value, comprising: passes through increase
The control electric current of the clutch in sliding state of rubbing is to default value, by the pressure of the clutch in sliding state of rubbing
Increase to the preset pressure value.
Optionally, the determining vehicle is in low speed slide downshift operating condition, comprising: when determining that speed and gear be in down
Drop state, and the speed, brake pressure and accelerator open degree, TOT Transmission Oil Temperature respectively in corresponding preset range when, really
Determine vehicle and is in low speed slide downshift operating condition.
Optionally, described to detect that selector fork starts to hang shelves, comprising: when the drop for receiving gear box control unit transmission
When shelves instruction, determine that the selector fork starts to hang shelves.
The embodiment of the invention also provides a kind of gear box control unit, the gear box control unit includes:
Operating condition detection unit, is adapted to detect for whether vehicle is in low speed slide downshift operating condition；
Control unit, be suitable for when determine vehicle be in low speed slide downshift operating condition, and selector fork start extension shelves when, will locate
Preset pressure value is increased in the pressure of the clutch of sliding state of rubbing, until the selector fork is hung shelves and terminated；It is changed described in determination
At the end of keeping off shift fork extension shelves, when the control clutch pressure in sliding state of rubbing restores to the selector fork to start extension shelves
Pressure.
Optionally, described control unit is suitable for the control electric current by increasing the clutch in sliding state of rubbing to pre-
If numerical value, the pressure of the clutch in sliding state of rubbing is increased into the preset pressure value.
Optionally, the operating condition detection unit is suitable for when determining that speed and gear be in decline state, and the speed,
Brake pressure and accelerator open degree, TOT Transmission Oil Temperature respectively in corresponding preset range when, determine that vehicle is in low speed slide
Downshift operating condition.
Optionally, described to detect that low-grade location selector fork starts to hang shelves, comprising: when receiving downshift command, to determine
The selector fork starts to hang shelves.
Compared with prior art, technical solution of the present invention has the advantage that
Above-mentioned scheme, by vehicle low speed slide downshift stage and selector fork start shift when, will rub in cunning
The pressure of the clutch of state increases to preset pressure value, so as to eliminate the revolving speed of the clutch shafting due to sliding state of rubbing
Vibration and noise caused by being mutated, promotes the usage experience of user.
Detailed description of the invention
Fig. 1 is the drive mechanism signal of vehicle in the prior art dual-clutch transmission when low speed slide downshifts operating condition
Figure；
Fig. 2 be vehicle in the prior art be in low speed slide downshift operating condition when brake pressure, speed, clutch control
The variation tendency schematic diagram of electric current processed and engine speed；
Fig. 3 is the flow chart of one of embodiment of the present invention shift fork and clutch cooperative control method；
Fig. 4 is the flow chart of another shift fork and clutch cooperative control method in the embodiment of the present invention；
Fig. 5 is the brake being related to using the control process of shift fork and clutch cooperative control method in the embodiment of the present invention
Pressure, speed, clutch control electric current and engine speed variation tendency schematic diagram；
Fig. 6 is the structural schematic diagram of the gear box control unit in the embodiment of the present invention.
Specific embodiment
Fig. 1 is the drive mechanism signal of vehicle in the prior art dual-clutch transmission when low speed slide downshifts operating condition
Figure.As shown in Figure 1, when vehicle is when low speed slide downshifts operating condition, and odd number clutch Tc1 is in sliding state of rubbing, even number clutch
Device Tc2 is in completely open state.At this point, even number output shaft Nout2 is because of the reason that connect with main reducing gear, it is defeated with odd number
Enter axis Nin1 and odd number output shaft Nout1 and be also at linkage status, therefore when even gear selector fork (2,4 gear shift fork) pushes away
During dynamic synchronizer synchronizes, lead to the load sudden change of the shafting of odd input shaft Nin1 and odd number output shaft Nout1,
So that the shafting of odd input shaft Nin1 and odd number output shaft Nout1 generate vibration and noise.
Fig. 2 shows vehicle in the prior art be in low speed slide downshift operating condition when brake pressure, speed, clutch
Control electric current and engine speed variation tendency schematic diagram.Wherein, from Fig. 2 (b) as can be seen that being slided when vehicle is in low speed
When row downshift operating condition (see Fig. 2 (a)), shift fork moves back shelves to hanging during the entire process of shelves terminate, odd number clutch and even number clutch
Control electric current I1 remains constant.
Specifically, in Fig. 2 (d), 2,4 gear shift forks are from fourth gear gear position out of supply to middle in the time from t1 to t2；From
2,4 gear shift forks are stuck in the process of middle position in the period of t2 to t3；2 grades are hung since the t3 moment, at this time 2,4 gear shift fork
Start that synchronizer is pushed to synchronize, terminates in t4 timing synchronization process；T4 is that 2,4 gear shift forks push synchronization to the t5 period
Device hangs 2 grades of process.During above-mentioned, odd number axis revolving speed can be seen that in the period memory of t3 to t4 from Fig. 2 (c)
It is vibrating, there is driver comfort difference.
To solve the above-mentioned problems in the prior art, technical solution used in the embodiment of the present invention passes through low in vehicle
Ski-running row downshift stage and when selector fork starts shift, preset pressure will be increased in the pressure of the clutch of sliding state of rubbing
Value, the revolving speed of shafting, promotes the comfort of driving where can stablizing the clutch in sliding state of rubbing.
To make the above purposes, features and advantages of the invention more obvious and understandable, with reference to the accompanying drawing to the present invention
Specific embodiment be described in detail.
Fig. 3 shows the flow chart of one of embodiment of the present invention shift fork and clutch cooperative control method.Such as Fig. 3 institute
The shift fork and clutch cooperative control method shown may include:
Step S301: when determine vehicle be in low speed slide downshift operating condition, and detect selector fork start hang shelves when, will
The pressure of clutch in sliding state of rubbing increases to preset pressure value, until the selector fork is hung shelves and terminated.
Step S302: at the end of determining that the selector fork hangs shelves, the control clutch pressure in sliding state of rubbing
Power restores to the selector fork to start to hang pressure when shelves.
Below in conjunction with Fig. 4 in the embodiment of the present invention shift fork and clutch cooperative control method do it is further details of
Explanation.
Fig. 4 shows the flow chart of one of embodiment of the present invention shift fork and clutch cooperative control method.Such as Fig. 4 institute
The shift fork and clutch cooperative control method shown may include:
Step S401: whether detection vehicle, which is in low speed slide downshift operating condition, can execute step when the test results is yes
Rapid S402, conversely, can not then execute any step.
In specific implementation, it refers to shown in Fig. 5 (a), when the speed and gear of vehicle are in decline state, and it is described
Speed, brake pressure and accelerator open degree, TOT Transmission Oil Temperature respectively in corresponding preset range when, can determine that vehicle is in
Low speed slide downshift operating condition.
Step S402: when detecting that selector fork starts to hang shelves, by the control electric current of the clutch in sliding state of rubbing
Increase to default control current value.
In specific implementation, vehicle be in low speed slide downshift operating condition when, when selector fork start shift moment, i.e.,
When receiving the shifting commands of gearbox transmission, the control electric current moment of the clutch in sliding state of rubbing is increased into default control
Current value processed, to increase the pressure of the clutch in sliding state of rubbing, so as to improve the clutch institute for being in sliding state of rubbing
Shafting anti-loading be mutated ability.
As shown in Fig. 5 (b) and 5 (d), t1 to t2 is process of 2,4 selector forks from fourth gear gear position out of supply to middle；When t2
Start at quarter to hang 2 grades, since hydraulic system is there are operating lag, t2 to t3 is the process that 2,4 selector forks are stuck in middle position；When t3
2,4 selector forks are carved to start that synchronizer is pushed to synchronize.At the same time, by odd number clutch, (odd number clutch is in cunning and rubs
State) control electric current default control electric current I2, t4 timing synchronization process increased to by control electric current I1 moment terminate, t4 to t5
The process for pushing synchronizer to hang 2 grades for 24 shift forks.During above-mentioned t2 to t5, the control current value of odd number clutch is tieed up
It holds in I2, from Fig. 5 (c) as can be seen that odd number axis revolving speed is there is no vibrating, to greatly improve driver comfort.
Step S403: at the end of the selector fork hangs shelves, the control of the control clutch in sliding state of rubbing
Electric current restores to the selector fork to start to hang control electric current when shelves.
In specific implementation, at the end of selector fork shift, by the control electricity of the clutch in sliding state of rubbing
Stream restores to the selector fork to start to hang control electric current when shelves.It refers to shown in Fig. 5 (d), from odd number clutch after the t5 moment
Device control current value restores from I2 again to original control current value I1.
Below in conjunction with Fig. 6 in the embodiment of the present invention shift fork and the corresponding device of clutch cooperative control method do into
The detailed introduction of one step.
Fig. 6 shows the structural schematic diagram of the gear box control unit in the embodiment of the present invention.Gearbox as shown in FIG. 6
Control unit (TCU) 600 may include operating condition detection unit 601 and control unit 602, in which:
Operating condition detection unit 601, is adapted to detect for whether vehicle is in low speed slide downshift operating condition.
In specific implementation, the operating condition detection unit is suitable for being in decline state, and institute when determining speed and gear
State speed, brake pressure and accelerator open degree, TOT Transmission Oil Temperature respectively in corresponding preset range when, determine vehicle be in it is low
Ski-running row downshift operating condition.
Control unit 602, be suitable for when determine vehicle be in low speed slide downshift operating condition, and selector fork start extension shelves when,
The pressure of clutch in sliding state of rubbing is increased into preset pressure value, until the selector fork is hung shelves and terminated；Determine institute
At the end of stating selector fork extension shelves, the control clutch pressure in sliding state of rubbing restores to the selector fork to start to hang
Pressure when shelves.
In specific implementation, described to detect that low-grade location selector fork starts to hang shelves, comprising: when receiving downshift command
When, determine that the selector fork starts to hang shelves.
In specific implementation, described control unit 602 is suitable for the control by increasing the clutch in sliding state of rubbing
The pressure of the clutch in sliding state of rubbing is increased to the preset pressure value to default value by electric current processed.
Those of ordinary skill in the art will appreciate that all or part of the steps in the various methods of above-described embodiment is can
It is completed with instructing relevant hardware by program, which can store in computer readable storage medium, and storage is situated between
Matter may include: ROM, RAM, disk or CD etc..
The method and system of the embodiment of the present invention are had been described in detail above, the present invention is not limited thereto.Any
Field technical staff can make various changes or modifications without departing from the spirit and scope of the present invention, therefore guarantor of the invention
Shield range should be defined by the scope defined by the claims..
Claims (8)
1. a kind of shift fork and clutch cooperative control method characterized by comprising
It, will be in sliding state of rubbing when determining that vehicle is in low speed slide downshift operating condition, and detecting that selector fork starts to hang shelves
The pressure of clutch increase to preset pressure value, until the selector fork is hung shelves and is terminated；
At the end of determining that the selector fork hangs shelves, the control clutch pressure in sliding state of rubbing restores to described to change
Gear shift fork starts to hang pressure when shelves.
2. shift fork according to claim 1 and clutch cooperative control method, which is characterized in that described to be in the sliding shape that rubs
The pressure of the clutch of state increases to preset pressure value, comprising: by the control for increasing the clutch in sliding state of rubbing
The pressure of the clutch in sliding state of rubbing is increased to the preset pressure value to default value by electric current.
3. shift fork according to claim 1 and clutch cooperative control method, which is characterized in that the determining vehicle is in
Low speed slide downshifts operating condition, comprising: when determining that speed and gear be in decline state, and the speed, brake pressure and oil
Door aperture, TOT Transmission Oil Temperature respectively in corresponding preset range when, determine vehicle be in low speed slide downshift operating condition.
4. shift fork according to claim 1 and clutch cooperative control method, which is characterized in that described to detect that shift is dialled
Fork begins to hang shelves, comprising: when receiving the downshift command of gear box control unit transmission, determines that the selector fork starts to hang
Shelves.
5. a kind of gear box control unit characterized by comprising
Operating condition detection unit, is adapted to detect for whether vehicle is in low speed slide downshift operating condition；
Control unit, be suitable for when determine vehicle be in low speed slide downshift operating condition, and selector fork start hang shelves when, will in cunning
The pressure of the clutch for state of rubbing increases to preset pressure value, until the selector fork is hung shelves and terminated；Determine that the shift is dialled
At the end of fork hangs shelves, the control clutch pressure in sliding state of rubbing restores to the selector fork to start to hang pressure when shelves
Power.
6. gear box control unit according to claim 5, which is characterized in that described control unit is suitable for by increasing institute
The control electric current of the clutch in sliding state of rubbing is stated to default value, the pressure of the clutch in sliding state of rubbing is increased
The big extremely preset pressure value.
7. gear box control unit according to claim 5, which is characterized in that the operating condition detection unit is suitable for when determination
Speed and gear are in decline state, and the speed, brake pressure and accelerator open degree, TOT Transmission Oil Temperature are respectively corresponding
Preset range in when, determine vehicle be in low speed slide downshift operating condition.
8. gear box control unit according to claim 5, which is characterized in that described to detect that low-grade location selector fork is opened
Begin to hang shelves, comprising: when receiving downshift command, determine that the selector fork starts to hang shelves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510960887.3A CN106895142B (en) | 2015-12-18 | 2015-12-18 | Gear box control unit and its shift fork and clutch cooperative control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510960887.3A CN106895142B (en) | 2015-12-18 | 2015-12-18 | Gear box control unit and its shift fork and clutch cooperative control method |
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| Publication Number | Publication Date |
|---|---|
| CN106895142A CN106895142A (en) | 2017-06-27 |
| CN106895142B true CN106895142B (en) | 2019-05-10 |
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| CN201510960887.3A Active CN106895142B (en) | 2015-12-18 | 2015-12-18 | Gear box control unit and its shift fork and clutch cooperative control method |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113048234B (en) * | 2021-02-28 | 2022-04-19 | 重庆青山工业有限责任公司 | Coaxial gear shifting control method of DCT (discrete cosine transformation) transmission |
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| CN104769336A (en) * | 2012-12-25 | 2015-07-08 | 爱信艾达株式会社 | Transmission control device and control method |
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| JP4722171B2 (en) * | 2008-09-04 | 2011-07-13 | ジヤトコ株式会社 | Vehicle control device |
| US8965653B2 (en) * | 2013-07-24 | 2015-02-24 | GM Global Technology Operations LLC | Partial prefill of clutch for coast downshift conditions in a vehicle |
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|---|---|---|---|---|
| US6491604B1 (en) * | 1998-11-16 | 2002-12-10 | Yanmar Diesel Engine Co., Ltd. | Method of controlling hydraulic pressure in speed change mechanism having hydraulic clutch |
| CN101228057A (en) * | 2005-05-19 | 2008-07-23 | 丰田自动车株式会社 | Vehicle drive device controller |
| CN1978952A (en) * | 2005-12-06 | 2007-06-13 | 丰田自动车株式会社 | Shift control device and shift control method of vehicular automatic transmission |
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| CN106895142A (en) | 2017-06-27 |
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