Oil charging and semi-linkage-point self-learning method of double-clutch automatic transmission

[0029] The following embodiments illustrate the technical solutions of the present invention in detail. The following embodiments are only exemplary, and can only be used to explain and illustrate the technical solutions of the present invention, and cannot be construed as limiting the technical solutions of the present invention.

[0030] The invention provides an oil filling method for a dual-clutch automatic gearbox, which includes the following steps: image 3 with Figure 4 As shown, the oil filling method also includes the desired pressure 3 and the actual oil filling pressure 4.

[0031] First of all, it is necessary to calibrate the dual-clutch automatic transmission at different oil temperatures, different filling pressures, and how many setting stages the corresponding filling pressure is divided into. Specifically, according to the difference of the oil temperature in the oil pan, when the gearbox shifts , The difference in oil filling pressure in different gears is divided into different setting stages, and in this application, the difference in oil filling pressure of two adjacent setting stages is equal, for example (this example does not mean this application In the technical solution, the actual charging pressure of the automatic transmission and the set stage), if the first gear is shifted to the second gear, the charging pressure should be 10MPa, the current sump oil temperature is 80℃, according to the setting It is divided into five setting stages. First, in the first stage, the filling pressure is 2MPa, in the second stage, the filling pressure is increased to 4MPa, in the third stage, the filling pressure is increased to 6MPa, and in the fourth stage, The oil filling pressure is increased to 8MPa, and in the fifth stage, the oil filling pressure is increased to 10MPa.

[0032] At the same time, the oil filling time of different stages under different oil temperature conditions can also be calibrated.

[0033] And different oil temperature, different oil filling pressure and corresponding setting stage are compiled and stored in the oil filling control module.

[0034] After the oil charging control module receives the oil charging command, the oil charging control module receives the current oil temperature detected by the sensor, compares the detected current oil temperature with the control table, and extracts the corresponding data in the control table as the current control Control data.

[0035] The oil charging control module divides the oil charging pressure of the clutch into set stages according to the current oil temperature; then, the oil pressure is stepped up to complete the oil charging control of the clutch.

[0036] At the same time, the oil filling control module adjusts the filling time of the filling pressure in the corresponding setting stage according to the current oil temperature.

[0037] The oil temperature is the oil temperature in the oil pan.

[0038] The oil filling time is set by calibration and controlled by interpolation.

[0039] A self-learning method for the semi-linked points of a dual-clutch automatic transmission, such as figure 2 As shown, any one of the above-mentioned dual-clutch automatic transmission oil charging methods is adopted, that is, the oil charging pressure values ​​corresponding to different setting stages are recorded separately.

[0040] The steps include:

[0041] After the fuel charging control module receives the fuel charging command, it judges the state of the vehicle. When the vehicle speed is greater than 0, the semi-junction self-learning control is not performed; when the vehicle speed is equal to 0, the fuel is filled The control module records the torque value input to the gearbox corresponding to the filling pressure, and stores the torque value. At the same time, the first torque value is used as the default value and the number of filling times is recorded.

[0042] When the number of oil filling times is equal to the set number of times, in this application, the number of oil filling times is set to 10 times. In other embodiments of this application, the number of oil filling times can be set to less than 10 times as needed or can be set For more than 10 times, the technical solution of the present application can be realized.

[0043] The oil filling control module calculates the average torque value of the torque value corresponding to the set oil filling times, and compares the average torque value with the default value;

[0044] If the average torque value is less than the default value, the half-linkage pressure will be increased accordingly; if the average torque value is greater than the default value, the half-linkage pressure will be decreased accordingly.

[0045] In other embodiments of the present application, it is also possible to calibrate the torque value of the automatic clutch first, and use the calibrated torque value as the default value. When the average torque value is detected to be less than the default value, the charging control module controls to increase the semi-linked point pressure by a fixed value (it can also be obtained through calibration), and uses the torque value corresponding to the increased semi-linked point pressure as the new When the detected average torque value is greater than the default value, the filling control module controls to reduce the semi-linked point pressure by a fixed value, and uses the reduced semi-linked point pressure as the corresponding torque value The new default value.

[0046] The above is only a description of the preferred embodiments of the present invention. It should be pointed out that due to the limited expression of words, there are objectively unlimited specific structures. For those of ordinary skill in the art, the principle of the present invention Under the premise, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.