CN118188714A - Clutch half-junction self-learning method of wet DCT - Google Patents
Clutch half-junction self-learning method of wet DCT Download PDFInfo
- Publication number
- CN118188714A CN118188714A CN202410267078.3A CN202410267078A CN118188714A CN 118188714 A CN118188714 A CN 118188714A CN 202410267078 A CN202410267078 A CN 202410267078A CN 118188714 A CN118188714 A CN 118188714A
- Authority
- CN
- China
- Prior art keywords
- clutch
- value
- pressure value
- pressure
- self
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000013461 design Methods 0.000 claims abstract description 8
- 230000005540 biological transmission Effects 0.000 claims description 30
- 238000002474 experimental method Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 description 14
- 230000008859 change Effects 0.000 description 5
- 238000005304 joining Methods 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Landscapes
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
Abstract
A clutch half-junction self-learning method of wet DCT includes the following steps: 1) Acquiring a pressure-current theoretical relation curve of a clutch electromagnetic valve; 2) Taking a pressure value corresponding to a maximum theoretical half-combining point of clutch hardware design as a clutch oil filling pressure value, and taking a current value corresponding to the oil filling pressure value as an oil filling current value; 3) Taking the minimum value of the clutch piston moving pressure point as a self-learning pressure value, and taking a current value corresponding to the self-learning pressure value as a self-learning current value; 4) And adjusting the magnitude of the input current of the electromagnetic valve according to the fixed step length according to the oil charge current value and the self-learning current value, acquiring clutch theoretical pressure values corresponding to different input currents of the electromagnetic valve by utilizing a pressure-current theoretical relation curve, calculating the difference value between each clutch theoretical pressure value and the corresponding clutch actual pressure value, and adjusting the clutch half-junction pressure set value of the TCU in real time according to the clutch actual pressure value when the difference value is maximum.
Description
Technical Field
The invention relates to the field of DCT control, in particular to a clutch half-junction self-learning method of wet DCT.
Background
The wet DCT is a double-clutch transmission for clutch cooling through oil, and an automobile using the double-clutch transmission realizes uninterrupted power transmission by driving the separation and combination of two clutches through a hydraulic system or a motor in the gear shifting process, integrates the advantages of a manual transmission and an automatic transmission, improves the fuel economy of the whole automobile, ensures the driving smoothness of gear shifting, is widely applied to various automobile manufacturing enterprises in China, wherein the hydraulic system is used as the driving force for clutch separation and combination, and the comfort of the gear shifting performance of the double-clutch transmission is directly influenced by the pressure control of the clutch.
The current clutch pressure control implementation scheme is to calculate the corresponding expected torques of two clutches according to the power demand and torque conditions of the whole vehicle, interpolate the expected torques through a torque-pressure characteristic curve to obtain the expected output pressure, interpolate the expected output pressure through a pressure-current characteristic curve to obtain the target current, and finally input the target current to an electromagnetic valve to control the clutch piston cavity to combine pressure so as to realize the combination and separation actions of the clutches.
In order to realize the stability of clutch control in the process, a pressure sensor is usually arranged at the clutch end, and a pressure signal acquired by the sensor is used as a feedback signal to regulate the expected output pressure so as to obtain the final output control pressure. However, the pressure sensor is often affected by various factors such as temperature, oil quality, and clutch wear during use, so that the actual half-junction data of the wet DCT is continuously changed during the whole life cycle of the wet DCT, and an error is generated between the actual half-junction data of the wet DCT and the clutch half-junction data stored in the TCU. The magnitude of the error directly relates to the quality of clutch pressure control, and if the error cannot be controlled in an allowable range in time, the performance problems such as gear shifting impact of the whole vehicle or gear shifting frustration in the driving process are extremely easy to cause, and potential safety hazards are generated.
In the past, conventional clutch half-junction self-learning methods have been relatively sensitive to pressure fluctuations, resulting in relatively large self-learning errors. Although the self-learning method of the semi-junction of the hydraulic control wet clutch with the publication number of CN115654034A carries out filtering treatment on the clutch pressure in the self-learning process, the influence of a part of external factors such as pressure fluctuation and the like is eliminated. However, this also results in the whole self-learning process becoming more complex, which is disadvantageous for accurate acquisition of the clutch half-engagement point data.
How to simplify the self-learning process as much as possible while ensuring that the self-learning result is within the error allowable range under the condition of eliminating a series of external factors such as pressure fluctuation and the like is always a problem to be solved in the art.
Disclosure of Invention
Aiming at the corresponding defects of the prior art, the invention provides a self-learning method for the half-joint of the clutch of the wet DCT, which greatly simplifies the self-learning process of the half-joint of the clutch under the condition of eliminating a series of external factors such as pressure fluctuation, and the like, automatically learns and updates the pressure value of the half-joint of the clutch in real time along with the change of various factors such as temperature, oil quality, clutch abrasion, and the like, ensures that the error between the data of the half-joint of the clutch stored in the TCU and the data of the real half-joint of the wet DCT is in an allowable range, and avoids the performance or function problems such as gear shifting impact, gear shifting instant and the like of the whole vehicle in the driving process, thereby generating potential safety hazards.
The invention is realized by adopting the following scheme: a clutch half-junction self-learning method of wet DCT includes the following steps:
1) Acquiring a pressure-current theoretical relation curve of a clutch electromagnetic valve;
2) Taking a pressure value corresponding to a maximum theoretical half-combining point of clutch hardware design as a clutch oil filling pressure value, and taking a current value corresponding to the oil filling pressure value as an oil filling current value;
3) Taking the minimum value of the clutch piston moving pressure point as a self-learning pressure value, and taking a current value corresponding to the self-learning pressure value as a self-learning current value;
4) Triggering a clutch half-junction self-learning function according to the oil temperature of the transmission, adjusting the magnitude of the input current of the electromagnetic valve according to a fixed step length according to the oil filling current value and the self-learning current value, acquiring clutch theoretical pressure values corresponding to different input currents of the electromagnetic valve by utilizing a pressure-current theoretical relation curve, calculating the difference value between each clutch theoretical pressure value and a corresponding clutch actual pressure value, and adjusting a clutch half-junction pressure set value of the TCU in real time according to the clutch actual pressure value when the difference value is maximum.
Preferably, the manner of adjusting the clutch half-tie-point pressure setting of the TCU in real time includes the steps of:
4-1) clutch oil fill phase:
the magnitude of the input current of the wet DCT electromagnetic valve is adjusted to be an oil charge current value, and the actual pressure value of the clutch is compared with the magnitude of the oil charge pressure value of the clutch:
if the actual pressure value of the clutch is smaller than the oil filling pressure value of the clutch, continuously maintaining the magnitude of the input current of the electromagnetic valve;
If the actual pressure value of the clutch is more than or equal to the oil filling pressure value of the clutch, the self-learning stage of the half-junction point of the clutch is entered;
4-2) a clutch half-tie point self-learning phase:
the magnitude of the input current of the wet DCT solenoid valve is adjusted to be a self-learning current value, and the actual pressure value of the clutch is compared with the magnitude of the self-learning pressure value:
if the actual pressure value of the clutch is larger than the self-learning pressure value, continuously maintaining the magnitude of the input current of the electromagnetic valve;
If the actual pressure value of the clutch is less than or equal to the self-learning pressure value, self-learning the clutch half-combining point is performed according to the following mode:
① Increasing the input current of the wet DCT solenoid valve according to a fixed step length;
② Obtaining a clutch theoretical pressure value corresponding to the current wet DCT electromagnetic valve input current according to the theoretical relation curve;
③ Recording the difference between a theoretical clutch pressure value corresponding to the input current of the current wet DCT electromagnetic valve and an actual clutch pressure value as pressure difference data;
④ And repeating the step ①～③ until the actual clutch pressure value is greater than the clutch oil filling pressure value, and adjusting the original clutch half-junction pressure value in the gearbox TCU according to the actual clutch pressure value when the pressure difference data is maximum.
Preferably, the self-learning repetition number is preset, the self-learning of the clutch half-combining point is carried out according to the self-learning repetition number for a plurality of times, the actual clutch pressure value when the pressure difference value data in the self-learning stage of each clutch half-combining point is maximum is recorded, the average value of the actual clutch pressure values is calculated, and the original clutch half-combining point pressure value in the transmission TCU is modified according to the average value.
Preferably, when the number of self-learning repetitions is greater than 1, a half-junction self-learning result fluctuation threshold is set, and the original clutch half-junction pressure value in the gearbox TCU is modified as follows:
⑴ Judging whether the actual clutch pressure value is valid or not when the pressure difference value data recorded in the self-learning stage of each clutch half-combining point is maximum:
Calculating the difference between the actual pressure value of the clutch when the current recorded pressure difference data is maximum and the actual pressure value of the clutch when the last recorded pressure difference data is maximum, if the difference is smaller than the semi-junction self-learning result fluctuation threshold value, the actual pressure value of the clutch when the current recorded pressure difference data is maximum is effective, and if the difference is more than or equal to the semi-junction self-learning result fluctuation threshold value, the actual pressure value of the clutch when the current recorded pressure difference data is maximum is ineffective;
⑵ And removing the invalid clutch actual pressure value, adding all valid clutch actual pressure values, calculating an average value, and modifying the original clutch half-junction pressure value in the gearbox TCU according to the average value.
Preferably, in step ④, before modifying the original clutch half-junction pressure value in the transmission TCU according to the actual clutch pressure value when the pressure difference data is maximum, the temperature compensation value corresponding to the current transmission oil temperature is queried in the temperature compensation table, then the actual clutch pressure value when the pressure difference data is maximum is added to the queried temperature compensation value, and finally the obtained and modified original clutch half-junction pressure value in the transmission TCU is utilized.
Preferably, before modifying the original clutch half-junction pressure value in the gearbox TCU according to the average value, the temperature compensation value corresponding to the current transmission oil temperature is queried in the temperature compensation table, the average value is added with the queried temperature compensation value, and finally the obtained and modified original clutch half-junction pressure value in the gearbox TCU is utilized.
Preferably, the temperature compensation table is obtained through calibration experiments.
The invention has the advantages that:
① According to the invention, the half-joint pressure value of the clutch can be self-learned and updated in real time along with the change of various factors such as temperature, oil quality, clutch abrasion and the like, so that the error between the clutch half-joint data stored in the TCU and the real half-joint data of the wet DCT clutch is ensured to be in an allowable range, and the performance problems such as gear shifting impact or gear shifting frustration and the like of the whole vehicle in the running process are avoided, and potential safety hazards are generated;
② Compared with a self-learning method of a half-junction of a hydraulic control wet clutch with the publication number of CN115654034A, the self-learning method of the half-junction is low in sensitivity to pressure fluctuation, does not need filtering treatment, and is simpler and more convenient in self-learning process.
Drawings
FIG. 1 is a flow chart of the present invention;
FIG. 2 is a graph showing data related to a clutch half-join self-learning process of a wet DCT according to an embodiment of the invention.
Detailed Description
As shown in fig. 1 to 2, the object of the present invention is achieved by the following scheme: a clutch half-junction self-learning method of wet DCT includes the following steps:
1) Acquiring a pressure-current theoretical relation curve of a clutch electromagnetic valve;
The pressure-current theoretical relationship curve in this embodiment is actually a fitted relationship curve between the input current and the corresponding output pressure of the solenoid valve, and is generally obtained through calibration test before the clutch solenoid valve leaves the factory, and is generally provided by the solenoid valve manufacturer.
2) Taking a pressure value corresponding to a maximum theoretical half-combining point of clutch hardware design as a clutch oil filling pressure value, and taking a current value corresponding to the oil filling pressure value as an oil filling current value;
The maximum theoretical half-joining point of the clutch hardware design is usually given by a clutch design manufacturer, and the half-joining point with the maximum pressure value can be taken as the maximum theoretical half-joining point of the clutch hardware design in the theoretical distribution interval of the half-joining point of the clutch. The theoretical distribution interval of the half joint point of the clutch can be generally calculated through a size chain of the clutch design and the torque transmission characteristic of the clutch in the engaging process.
3) Taking the minimum value of the clutch piston moving pressure point as a self-learning pressure value, and taking a current value corresponding to the self-learning pressure value as a self-learning current value;
In this embodiment, the self-learning pressure value is greater than the elastic force of the piston return spring and the static friction force between the piston and the interior of the piston cylinder, and is infinitely close to the sum of the elastic force of the piston return spring and the static friction force between the piston and the interior of the piston cylinder, so that it is actually ensured that the pressure applied to the piston stationary in the cylinder will be changed from the stationary state to the moving state once the pressure applied to the piston stationary in the cylinder reaches the minimum value of the moving pressure point of the clutch piston. This clutch piston displacement pressure point minimum may also be given by the clutch designer.
4) Triggering a clutch half-junction self-learning function according to the oil temperature of the transmission, adjusting the magnitude of the input current of the electromagnetic valve according to a fixed step length according to the oil charge current value and the self-learning current value, acquiring clutch theoretical pressure values corresponding to different input currents of the electromagnetic valve by utilizing a pressure-current theoretical relation curve, calculating the difference value between each clutch theoretical pressure value and a corresponding clutch actual pressure value, and adjusting a clutch half-junction pressure set value of the TCU in real time according to the clutch actual pressure value when the difference value is maximum, wherein the specific steps are as follows:
4-1) clutch oil fill phase:
the magnitude of the input current of the wet DCT electromagnetic valve is adjusted to be an oil charge current value, and the actual pressure value of the clutch is compared with the magnitude of the oil charge pressure value of the clutch:
if the actual pressure value of the clutch is smaller than the oil filling pressure value of the clutch, continuously maintaining the magnitude of the input current of the electromagnetic valve;
If the actual pressure value of the clutch is more than or equal to the oil filling pressure value of the clutch, the self-learning stage of the half-junction point of the clutch is entered;
4-2) a clutch half-tie point self-learning phase:
the magnitude of the input current of the wet DCT solenoid valve is adjusted to be a self-learning current value, and the actual pressure value of the clutch is compared with the magnitude of the self-learning pressure value:
if the actual pressure value of the clutch is larger than the self-learning pressure value, continuously maintaining the magnitude of the input current of the electromagnetic valve;
If the actual pressure value of the clutch is less than or equal to the self-learning pressure value, self-learning the clutch half-combining point is performed according to the following mode:
① Increasing the input current of the wet DCT solenoid valve according to a fixed step length;
② Obtaining a clutch theoretical pressure value corresponding to the current wet DCT electromagnetic valve input current according to the theoretical relation curve;
③ Recording the difference between a theoretical clutch pressure value corresponding to the input current of the current wet DCT electromagnetic valve and an actual clutch pressure value as pressure difference data;
④ And repeating the step ①～③ until the actual clutch pressure value is greater than the clutch oil filling pressure value, and adjusting the original clutch half-junction pressure value in the gearbox TCU according to the actual clutch pressure value when the pressure difference data is maximum.
In step ④ of this embodiment, before modifying the original clutch half-junction pressure value in the transmission TCU according to the clutch actual pressure value when the pressure difference data is maximum, the temperature compensation value corresponding to the current transmission oil temperature is queried in the temperature compensation table, then the clutch actual pressure value when the pressure difference data is maximum is added to the queried temperature compensation value, and finally the obtained and modified original clutch half-junction pressure value in the transmission TCU is utilized.
In order to ensure the self-learning effect, the error is controlled within the allowable range, the preset number of self-learning repetitions is 3, that is, the embodiment repeats step 4-2) three times, the half-junction self-learning of the three-time clutch is performed, the actual clutch pressure values when the pressure difference data is maximum in the three-time clutch half-junction self-learning stage are recorded as P (t 1), P (t 2) and P (t 3) respectively, after judging whether the actual clutch pressure value when the pressure difference data is maximum in each clutch half-junction self-learning stage is valid or not, all the valid clutch actual pressure values are added, an average value is calculated, and the original clutch half-junction pressure value in the transmission TCU is modified according to the average value.
If the results of the three half-combining point self-learning are invalid, the three half-combining point self-learning is performed again until the results of at least one half-combining point self-learning are valid.
In this embodiment, the manner of determining whether the actual clutch pressure value is valid when the pressure difference data recorded in the self-learning phase of each clutch half-junction is maximum is as follows:
Calculating the difference between the actual pressure value of the clutch when the current recorded pressure difference data is maximum and the actual pressure value of the clutch when the last recorded pressure difference data is maximum, if the difference is smaller than the semi-junction self-learning result fluctuation threshold value, the actual pressure value of the clutch when the current recorded pressure difference data is maximum is effective, and if the difference is more than or equal to the semi-junction self-learning result fluctuation threshold value, the actual pressure value of the clutch when the current recorded pressure difference data is maximum is ineffective;
It is noted that before the original clutch half-junction pressure value in the gearbox TCU is modified according to the average value, the temperature compensation value corresponding to the current transmission oil temperature is queried in a temperature compensation table obtained in advance by using a calibration experiment, the average value is added with the queried temperature compensation value, and finally the obtained and modified original clutch half-junction pressure value in the gearbox TCU is utilized, so that the error influenced by the temperature of the self-learning result can be controlled within an allowable range.
In order to ensure the safety of the whole self-learning process, before triggering the clutch half-combining point self-learning function, whether the current state of the automobile meets the preparation condition for triggering the clutch half-combining point self-learning function should be judged, then the current transmission oil temperature is adopted to be compared with an oil temperature threshold value, if the transmission oil temperature is more than or equal to the oil temperature threshold value, the clutch half-combining point self-learning function is triggered, and if the transmission oil temperature is less than the oil temperature threshold value, the clutch half-combining point self-learning function is not triggered (the setting of the oil temperature threshold value is set according to the specific situation, and can be set to be 60 ℃).
In this embodiment, when the state of the automobile is in a parking idle state, the preparation conditions for triggering the clutch half-combining point self-learning function are as follows:
⑴ The current vehicle speed is zero;
⑵ Determining that the hand brake is started;
⑶ The gear position is in neutral gear;
When the automobile is in a parking idle state, the three conditions must be satisfied at the same time, and the two clutches of the wet DCT can be self-learned at half-engagement points at the same time.
When the automobile is in a driving state, whether the current DCT transmission gear is an odd gear or an even gear needs to be judged, if the current gear is the odd gear, the following preparation conditions are simultaneously satisfied, and half-junction self-learning can be carried out on the clutch corresponding to the even gear:
(1) Engine speed > engine speed threshold (the setting of the engine speed threshold may be set to generally 2000rpm as the case may be);
(2) The accelerator pedal change rate is less than or equal to an accelerator pedal change rate threshold (the accelerator pedal change rate threshold may be set to 5% in general depending on the case);
(3) The even-numbered stage synchronizer fork returns to the idle position.
Similarly, when the automobile is in a driving state, if the current gear is an even gear, half-engagement self-learning can be performed on the clutch corresponding to the odd gear if the two preparation conditions are met simultaneously.
In summary, triggering the clutch half-tie-point self-learning function to correct the clutch half-tie-point under driving conditions requires ensuring that the clutch self-learning process does not affect the torque transfer of the transmission during normal driving.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the invention, and those skilled in the art will appreciate that the modifications made to the invention fall within the scope of the invention without departing from the spirit of the invention.
Claims (7)
1. The clutch half-junction self-learning method of the wet DCT is characterized by comprising the following steps of:
1) Acquiring a pressure-current theoretical relation curve of a clutch electromagnetic valve;
2) The method comprises the steps of obtaining a pressure value corresponding to a maximum theoretical half-combining point of clutch hardware design as a clutch oil filling pressure value, and taking a current value corresponding to the oil filling pressure value as an oil filling current value;
3) Acquiring a minimum value of a clutch piston moving pressure point as a self-learning pressure value, and taking a current value corresponding to the self-learning pressure value as a self-learning current value;
4) Triggering a clutch half-junction self-learning function according to the oil temperature of the transmission, adjusting the magnitude of the input current of the electromagnetic valve according to a fixed step length according to the oil filling current value and the self-learning current value, acquiring clutch theoretical pressure values corresponding to different input currents of the electromagnetic valve by utilizing a pressure-current theoretical relation curve, calculating the difference value between each clutch theoretical pressure value and a corresponding clutch actual pressure value, and adjusting a clutch half-junction pressure set value of the TCU in real time according to the clutch actual pressure value when the difference value is maximum.
2. The method of claim 1, wherein the means for adjusting the clutch half-tie-point pressure setting of the TCU in real time comprises the steps of:
4-1) clutch oil fill phase:
the magnitude of the input current of the wet DCT electromagnetic valve is adjusted to be an oil charge current value, and the actual pressure value of the clutch is compared with the magnitude of the oil charge pressure value of the clutch:
if the actual pressure value of the clutch is smaller than the oil filling pressure value of the clutch, continuously maintaining the magnitude of the input current of the electromagnetic valve;
If the actual pressure value of the clutch is more than or equal to the oil filling pressure value of the clutch, the self-learning stage of the half-junction point of the clutch is entered;
4-2) a clutch half-tie point self-learning phase:
the magnitude of the input current of the wet DCT solenoid valve is adjusted to be a self-learning current value, and the actual pressure value of the clutch is compared with the magnitude of the self-learning pressure value:
if the actual pressure value of the clutch is larger than the self-learning pressure value, continuously maintaining the magnitude of the input current of the electromagnetic valve;
If the actual pressure value of the clutch is less than or equal to the self-learning pressure value, self-learning the clutch half-combining point is performed according to the following mode:
① Increasing the input current of the wet DCT solenoid valve according to a fixed step length;
② Obtaining a clutch theoretical pressure value corresponding to the current wet DCT electromagnetic valve input current according to the theoretical relation curve;
③ Recording the difference between a theoretical clutch pressure value corresponding to the input current of the current wet DCT electromagnetic valve and an actual clutch pressure value as pressure difference data;
④ And repeating the step ①～③ until the actual clutch pressure value is greater than the clutch oil filling pressure value, and adjusting the original clutch half-junction pressure value in the gearbox TCU according to the actual clutch pressure value when the pressure difference data is maximum.
3. The method according to claim 2, wherein the number of self-learning repetitions is preset, the clutch half-combining point self-learning is performed according to the number of self-learning repetitions and the step 4-2) is repeated for a plurality of times, actual clutch pressure values at the time when the pressure difference data in the respective clutch half-combining point self-learning phases is the maximum are recorded, average values of the actual clutch pressure values are calculated, and the original clutch half-combining point pressure values in the transmission TCU are modified according to the average values.
4. A method of clutch half-tie-point self-learning for a wet DCT as claimed in claim 3, wherein when the number of self-learning repetitions is greater than 1, a half-tie-point self-learning result fluctuation threshold is set, and the original clutch half-tie-point pressure value in the gearbox TCU is modified as follows:
⑴ Judging whether the actual clutch pressure value is valid or not when the pressure difference value data recorded in the self-learning stage of each clutch half-combining point is maximum:
Calculating the difference between the actual pressure value of the clutch when the current recorded pressure difference data is maximum and the actual pressure value of the clutch when the last recorded pressure difference data is maximum, if the difference is smaller than the semi-junction self-learning result fluctuation threshold value, the actual pressure value of the clutch when the current recorded pressure difference data is maximum is effective, and if the difference is more than or equal to the semi-junction self-learning result fluctuation threshold value, the actual pressure value of the clutch when the current recorded pressure difference data is maximum is ineffective;
⑵ And removing the invalid clutch actual pressure value, adding all valid clutch actual pressure values, calculating an average value, and modifying the original clutch half-junction pressure value in the gearbox TCU according to the average value.
5. The method according to claim 2, wherein in step ④, before modifying the original clutch half-junction pressure value in the TCU according to the actual clutch pressure value when the pressure difference data is the largest, the temperature compensation value corresponding to the current transmission oil temperature is first queried in the temperature compensation table, then the actual clutch pressure value when the pressure difference data is the largest is added to the queried temperature compensation value, and finally the original clutch half-junction pressure value in the TCU is modified by using the obtained sum.
6. The method according to claim 3 or 4, wherein before modifying the original clutch half-joint pressure value in the TCU of the transmission according to the average value, the temperature compensation value corresponding to the current transmission oil temperature is queried in the temperature compensation table, the average value is added to the queried temperature compensation value, and the obtained and modified original clutch half-joint pressure value in the TCU of the transmission is finally utilized.
7. The method of claim 5, wherein the temperature compensation table is obtained by calibration experiments.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410267078.3A CN118188714A (en) | 2024-03-08 | 2024-03-08 | Clutch half-junction self-learning method of wet DCT |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410267078.3A CN118188714A (en) | 2024-03-08 | 2024-03-08 | Clutch half-junction self-learning method of wet DCT |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118188714A true CN118188714A (en) | 2024-06-14 |
Family
ID=91407962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410267078.3A Pending CN118188714A (en) | 2024-03-08 | 2024-03-08 | Clutch half-junction self-learning method of wet DCT |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118188714A (en) |
-
2024
- 2024-03-08 CN CN202410267078.3A patent/CN118188714A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8131438B2 (en) | Method for controlling an automated friction clutch | |
| US7507182B2 (en) | Controller, control method and control system for controlling a motor vehicle gear-type transmission | |
| JP2849035B2 (en) | Electric control method for automatic transmission of automobile | |
| KR100268403B1 (en) | Touch point identification algorothm for automatic clutch controller | |
| EP2273145B1 (en) | CLUTCH CONTROL DEVICE AND µ-CORRECTION FACTOR CALCULATING METHOD | |
| US7131932B2 (en) | Method for determing a transmittable torque of a clutch in an automatic transmission of a motor vehicle | |
| US20120298466A1 (en) | Clutch control device | |
| US7740558B2 (en) | Automatic transmission, control apparatus and control method for the same | |
| KR19990087062A (en) | Clutch control system | |
| US11125322B2 (en) | Flow valve control method and apparatus, and storage medium | |
| US20160047714A1 (en) | Method of calibrating a clutch | |
| CN111536230A (en) | Static gear shifting control method of automatic gearbox | |
| CN103883642A (en) | Control method and device for clutch oil pressure | |
| CN102818007B (en) | The method of the input clutch of transmission for vehicles is controlled in oil supply event | |
| US20220065347A1 (en) | Method and Control Unit for Determining the Travel Range Between Two Gear Shift Element Halves of an Interlocking Gear Shift Element | |
| US8041489B2 (en) | Method for controlling a transmission during acceleration from idle | |
| CN111963673B (en) | Self-learning method and system for half-joint point of wet-type double-clutch transmission | |
| CN104930080B (en) | The Adaptive Control of linear actuator | |
| KR20190112537A (en) | Integrated controller for powertrain and method thereof | |
| CN118188714A (en) | Clutch half-junction self-learning method of wet DCT | |
| JP2012062998A (en) | Lock-up clutch controller of automatic transmission | |
| CN116733864A (en) | Wet clutch half-junction self-adaption method, system, vehicle and storage medium | |
| CN107914710B (en) | System and method for vehicle propulsion system control | |
| US10352376B2 (en) | Clutch control method of vehicle | |
| CN109690148B (en) | Method for calculating the position of a synchronized double clutch transmission |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |