Pressure control method, device and equipment for double-clutch semi-combination point and medium

Abstract

The invention discloses a pressure control method, device, equipment and medium for semi-combination points of double clutches. The method comprises the following steps: acquiring a first pressure of a historical round in a self-learning process of a semi-combination point of the double clutch; when the system main oil pressure is set to the maximum value, the pressure of the double clutch is adjusted with the first pressure as the target; with the second pressure as the target, the pressure of the double clutches is adjusted, and the target current when the double clutches are maintained at the second pressure is obtained; with the first pressure as a target, the pressure of the double clutches is adjusted, and the initial current when the double clutches are maintained at the first pressure is obtained; the double clutches are adjusted to reach the target current from the initial current, and real-time pressure change data of the double clutches in the adjusting process are obtained; according to the real-time pressure change data of the double clutches, the maximum pressure slope is determined; according to the maximum pressure slope, whether the first pressure of the half-combination point of the double clutches is adjusted or not is detected. According to the embodiment of the invention, the accuracy of self-learning of the half-joint points of the double clutches can be improved.

Description

Technical Field

[0001] The present invention relates to the field of dual-clutch automatic transmission control, and in particular to a pressure control method, device, equipment and medium for a dual-clutch semi-engagement point. Background Art

[0002] With the rapid development of vehicle technology, automatic transmission has gradually become the mainstream in the vehicle market. As one of the advanced technologies, dual-clutch transmission has received more and more attention. The dual-clutch semi-engagement point self-learning technology can reduce the loss of the clutch.

[0003] At present, the semi-engagement point self-learning technology of the dual-clutch automatic transmission adjusts the position of the clutch engagement point by monitoring data such as engine speed, transmission input shaft speed, oil pressure and torque sensor.

[0004] However, the learning method of adjusting the dual-clutch semi-engagement point by monitoring relevant data has the problems of long learning cycle and poor adaptability. Summary of the invention

[0005] The present invention provides a pressure control method, device, equipment and medium for a dual clutch half-engagement point. The embodiments of the present invention can improve the accuracy of self-learning of the dual clutch half-engagement point.

[0006] In a first aspect, an embodiment of the present invention provides a method for controlling pressure at a half-engagement point of a dual clutch, the method comprising:

[0007] Obtain the first pressure of the historical rounds during the dual clutch half-engagement point self-learning process;

[0008] When the system main oil pressure is set to the maximum value, the pressure of the dual clutch is adjusted with the first pressure as the target;

[0009] Taking the second pressure as a target, adjusting the pressure of the dual clutch, and obtaining the target current when the dual clutch maintains the second pressure; the second pressure is greater than the first pressure;

[0010] Taking the first pressure as a target, adjusting the pressure of the dual clutch, and obtaining the initial current when the dual clutch maintains the first pressure;

[0011] Adjust the dual clutch from the initial current to the target current, and obtain the real-time pressure change data of the dual clutch during the adjustment process;

[0012] Determine the maximum pressure slope according to the real-time pressure change data of the dual clutch;

[0013] According to the maximum pressure slope, it is detected whether to adjust the first pressure of the dual clutch half-engagement point.

[0014] In a second aspect, an embodiment of the present invention further provides a pressure control device for a half-engagement point of a dual clutch, the device comprising:

[0015] A historical round pressure acquisition module is used to obtain the first pressure of the historical round during the dual clutch half-engagement point self-learning process;

[0016] A first pressure target adjustment module, used for adjusting the pressure of the dual clutch with the first pressure as the target when the system main oil pressure is set to the maximum value;

[0017] a target current acquisition module, used to adjust the pressure of the dual clutch with the second pressure as the target, and acquire the target current when the dual clutch maintains the second pressure; the second pressure is greater than the first pressure;

[0018] An initial current acquisition module, used to adjust the pressure of the dual clutch with the first pressure as the target, and acquire the initial current when the dual clutch maintains the first pressure;

[0019] The current adjustment and pressure data acquisition module is used to adjust the dual clutch from the initial current to the target current and obtain the real-time pressure change data of the dual clutch during the adjustment process;

[0020] A pressure maximum slope determination module, used to determine the pressure maximum slope according to the real-time pressure change data of the dual clutch;

[0021] The dual clutch half-engagement point first pressure detection module is used to detect whether to adjust the first pressure of the dual clutch half-engagement point according to the maximum pressure slope.

[0022] In a third aspect, an embodiment of the present invention further provides a pressure control device for a half-engagement point of a dual clutch, the pressure control device for a half-engagement point of a dual clutch comprising:

[0023] at least one processor; and

[0024] a memory communicatively connected to at least one processor; wherein,

[0025] The memory stores a computer program executable by at least one processor, and the computer program is executed by at least one processor so that the at least one processor can execute the pressure control method of the half-engagement point of the dual clutch according to any embodiment of the present invention.

[0026] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium storing computer instructions, which are used to enable a processor to implement the pressure control method of the dual clutch half-engagement point of any embodiment of the present invention when executed.

[0027] The technical solution of the embodiment of the present invention can improve the stability of the pressure regulation of the dual clutch by acquiring the first pressure of the historical rounds in the self-learning process of the dual clutch semi-engagement point and adjusting the pressure when the system main oil pressure is at the maximum value; by adjusting the pressure of the dual clutch with the second pressure as the target and acquiring the target current when the dual clutch maintains the second pressure, the relationship data between the pressure and the current can be acquired, which is helpful for precise control of the pressure; by adjusting the pressure of the dual clutch again with the first pressure as the target, the initial current when the dual clutch maintains the first pressure is acquired, which provides a data basis for subsequent pressure regulation; by adjusting the dual clutch from the initial current to the target current, the actual change data of the dual clutch pressure can be acquired based on the adjusted current; by analyzing the real-time pressure change data and determining the maximum slope of the pressure, it is helpful to identify whether the adjustment is too fast or too slow, and optimize the pressure control process; by detecting whether the first pressure of the semi-engagement point needs to be adjusted according to the maximum slope of the pressure, over-adjustment or under-adjustment can be effectively avoided, and the precise adjustment of the semi-engagement point can be ensured, thereby improving the smoothness of the vehicle shifting and the driving experience.

[0028] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 A flow chart of a pressure control method for a dual clutch half-engagement point provided by an embodiment of the present invention;

[0031] Figure 2 A flow chart of a pressure control method for a dual clutch half-engagement point provided by an embodiment of the present invention;

[0032] Figure 3 Flow chart of a pressure control method for a dual clutch half-engagement point provided by an embodiment of the present invention

[0033] Figure 4 A schematic structural diagram of a pressure control device for a half-engagement point of a dual clutch provided by an embodiment of the present invention;

[0034] Figure 5 A schematic structural diagram of a pressure control device for a half-engagement point of a dual clutch provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0036] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0037] In the technical solution of the embodiment of the present invention, the acquisition, storage and application of the current dual-clutch pressure, etc., are in compliance with the provisions of relevant laws and regulations and do not violate public order and good morals.

[0038] Figure 1 A flow chart of a pressure control method for a dual clutch half-engagement point provided by an embodiment of the present invention. The embodiment of the present invention is applicable to the case of pressure control of a dual clutch half-engagement point, and the method can be executed by a pressure control device for a dual clutch half-engagement point, and the pressure control device for a dual clutch half-engagement point can be implemented in the form of hardware and / or software.

[0039] See also Figure 1 The pressure control method of the dual clutch half-engagement point shown includes:

[0040] S101, obtaining the first pressure of the historical rounds in the dual clutch half-engagement point self-learning process.

[0041] The dual clutch semi-engagement point self-learning process may refer to a process of gradually adjusting the pressure of the dual clutch through multiple learning rounds according to the actual operating conditions of the vehicle to determine the optimal semi-engagement point position of the dual clutch. Self-learning is used to obtain the optimal semi-engagement point position of the dual clutch under different conditions, thereby improving driving smoothness and reducing wear.

[0042] The first pressure may refer to the pressure value of the dual clutch in the semi-engagement point state. The first pressure is used as a preliminary reference for adjusting the clutch state to help determine the subsequent adjustment direction and amplitude.

[0043] In a specific example, during the self-learning process of the dual clutch half-engagement point in each round, the vehicle controller software will record the pressure value of the dual clutch half-engagement point state obtained after each self-learning, and the pressure of the clutch half-engagement point state in the previous round in the historical round can be used as the first pressure.

[0044] S102: When the system main oil pressure is set to a maximum value, the pressure of the dual clutch is adjusted with the first pressure as a target.

[0045] Among them, the system main oil pressure may refer to the basic oil pressure provided by the hydraulic system in the dual clutch, and the system main oil pressure is used to control the disengagement state and engagement state of the clutch, thereby adjusting the pressure of the dual clutch. The stability and maximum value of the system main oil pressure determine the action strength and response speed of the dual clutch. Setting the system main oil pressure to the maximum value can provide sufficient hydraulic support for the operation of the dual clutch, so that the subsequent pressure regulation of the dual clutch is not affected by external factors. Exemplarily, the maximum value of the system required oil pressure and the self-learning preset oil pressure can be used as the system main oil pressure, wherein the system required oil pressure is calculated by other modules such as the gear shifting module and the clutch control module in the vehicle system; the self-learning preset oil pressure can be a preset fixed value, which can be set to 8 to 20 bar.

[0046] In a specific example, the system main oil pressure is set to a maximum value, and after the system main oil pressure is set to the maximum value for a certain duration, the pressure of the dual clutch is adjusted to the first pressure.

[0047] S103, adjusting the pressure of the dual clutch with the second pressure as the target, and obtaining the target current of the dual clutch when the second pressure is maintained; the second pressure is greater than the first pressure.

[0048] The second pressure may refer to a pressure value higher than the first pressure, and the second pressure is greater than the first pressure. By setting the second pressure, the command current of the dual clutch under different pressure conditions can be obtained. The command current may refer to a current signal used to control the dual clutch, and according to the command current, the dual clutch can output a corresponding execution action so that the dual clutch reaches the corresponding pressure.

[0049] Among them, the target current may refer to the control current when the dual clutch is maintained at the second pressure. By adjusting the pressure of the dual clutch, the pressure of the dual clutch reaches the second pressure, and the control current of the current dual clutch is obtained when the dual clutch pressure reaches the second pressure. Exemplarily, there is a certain correspondence between the dual clutch pressure and the control current. As the current increases, the amount of hydraulic oil regulated by the control valve will also increase, resulting in an increase in the clutch pressure; conversely, when the current decreases, the amount of hydraulic oil regulated by the control valve will also decrease, resulting in a decrease in the clutch pressure. Exemplarily, when the pressure of the dual clutch is 5 bar, the target current is 1.2A.

[0050] S104, adjusting the pressure of the dual clutch with the first pressure as the target, and obtaining the initial current of the dual clutch when the first pressure is maintained.

[0051] The initial current may refer to the control current when the dual clutch is maintained at the first pressure. The initial current is used to obtain the current value required when the dual clutch is maintained at the first pressure. The initial current reflects the operating state of the dual clutch command current under the first pressure, and the initial current serves as the basic data of the dual clutch adjustment starting point during the self-learning process. For example, when the pressure of the dual clutch in the semi-engagement point state is 2 bar, the initial current is 0.6A.

[0052] S105, adjusting the dual clutch from the initial current to the target current, and obtaining real-time pressure change data of the dual clutch during the adjustment process.

[0053] The real-time pressure change data may refer to the dual clutch pressure that changes with time during the process of adjusting the initial current to the target current. The real-time pressure change data is used to determine the pressure change during the process of the dual clutch pressure rising from the first pressure to the second pressure. For example, when the dual clutch pressure rises from 2 bar to 5 bar, the change curve of the dual clutch pressure is obtained.

[0054] In a specific example, in the process of the dual clutch pressure rising from the initial current to the target current, the initial current is 0.6A, the target current is 1.2A, the first pressure is 2bar, and the second pressure is 5bar. When the initial current of 0.6A is increased to the target current of 1.2A, the dual clutch pressure will continue to increase from 2bar to 5bar, and the real-time pressure change data of the dual clutch pressure from 2 to 5bar is obtained.

[0055] S106. Determine the maximum pressure slope according to the real-time pressure change data of the dual clutch.

[0056] The maximum pressure slope may refer to the slope at which the speed of change of the dual clutch pressure reaches the maximum value. The maximum pressure slope reflects the fastest speed of change of the dual clutch pressure. By determining the maximum pressure slope, it can be determined whether the current dual clutch half-engagement point pressure control has reached the optimal state.

[0057] S107: Detect whether to adjust the first pressure of the dual clutch half-engagement point according to the maximum pressure slope.

[0058] Based on the maximum pressure slope, determine whether the pressure in the current dual-clutch half-engagement point state is appropriate, that is, adjust the first pressure. When the maximum pressure slope is greater than the preset threshold, the pressure gradient changes too fast, and the first pressure is increased; when the maximum pressure slope is less than the preset threshold, the pressure gradient changes too slowly, and the first pressure is reduced.

[0059] The technical solution of the embodiment of the present invention can improve the stability of the pressure regulation of the dual clutch by acquiring the first pressure of the historical rounds in the self-learning process of the dual clutch semi-engagement point and adjusting the pressure when the system main oil pressure is at the maximum value; by adjusting the pressure of the dual clutch with the second pressure as the target and acquiring the target current when the dual clutch maintains the second pressure, the relationship data between the pressure and the current can be acquired, which is helpful for precise control of the pressure; by adjusting the pressure of the dual clutch again with the first pressure as the target, the initial current when the dual clutch maintains the first pressure is acquired, which provides a data basis for subsequent pressure regulation; by adjusting the dual clutch from the initial current to the target current, the actual change data of the dual clutch pressure can be acquired based on the adjusted current; by analyzing the real-time pressure change data and determining the maximum slope of the pressure, it is helpful to identify whether the adjustment is too fast or too slow, and optimize the pressure control process; by detecting whether the first pressure of the semi-engagement point needs to be adjusted according to the maximum slope of the pressure, over-adjustment or under-adjustment can be effectively avoided, and the precise adjustment of the semi-engagement point can be ensured, thereby improving the smoothness of the vehicle shifting and the driving experience.

[0060] Figure 2 The flow chart of a pressure control method for a dual clutch half-engagement point provided by an embodiment of the present invention is as follows: Based on the above embodiments, the pressure control operation of the dual clutch half-engagement point is optimized and improved.

[0061] Optionally, "taking the second pressure as the target, adjusting the pressure of the dual clutch, and obtaining the target current when the dual clutch is maintained at the second pressure" is refined into "taking the second pressure as the target, adjusting the pressure of the dual clutch; when the pressure of the dual clutch is maintained at the second pressure for the first time, adjusting the pressure of the dual clutch in a fixed step-by-step manner according to the difference between the actual pressure of the dual clutch and the second pressure; when the difference between the actual pressure of the dual clutch and the second pressure is less than a preset difference threshold, obtaining the target current" to improve the operation of the pressure control of the dual clutch semi-engagement point.

[0062] It should be noted that for the parts not described in detail in the embodiments of the present invention, reference may be made to the descriptions of other embodiments.

[0063] See also Figure 2 The pressure control method of the dual clutch half-engagement point shown includes:

[0064] S201. Obtain the first pressure of the historical round during the dual clutch half-engagement point self-learning process.

[0065] S202: When the system main oil pressure is set to a maximum value, the pressure of the dual clutch is adjusted with the first pressure as a target.

[0066] S203: Adjust the pressure of the dual clutch with the second pressure as the target.

[0067] Specifically, when the pressure of the dual clutch is adjusted to the first pressure and maintained for a certain period of time, the pressure value of the dual clutch is adjusted to the second pressure with the second pressure as the target.

[0068] S204: When the pressure of the dual clutch is maintained at the second pressure for the first time, adjusting the pressure of the dual clutch in a fixed step-wise manner according to a difference between the actual pressure of the dual clutch and the second pressure.

[0069] The first time may refer to a duration during which the pressure of the dual clutch is maintained at the second pressure.

[0070] The actual pressure may refer to the real pressure of the dual clutch. When the vehicle controller sets the pressure of the dual clutch to the second pressure, the real pressure of the dual clutch cannot reach the preset second pressure.

[0071] In a specific example, in the process of adjusting the dual clutch half-engagement point self-learning, the first pressure can be 2bar. When the pressure of the dual clutch is set to 2bar and maintained for a certain period of time, the pressure of the dual clutch is set to the second pressure, and the second pressure can be 5bar. The pressure of the dual clutch is increased to 5bar, but the actual pressure of the dual clutch cannot reach 5bar, that is, the actual pressure of the dual clutch is 5.3bar or 4.7bar, that is, there is a difference between the actual pressure of the dual clutch and the preset second pressure, and the pressure of the dual clutch is adjusted to approach the second pressure. The pressure of the dual clutch can be adjusted in a fixed step-by-step manner, and the pressure of the dual clutch is gradually adjusted, so that the deviation value between the actual pressure of the dual clutch and the second pressure is finally within the preset range. Among them, the fixed step-by-step manner can mean that when the actual pressure is lower than the second pressure, the dual clutch pressure is increased according to a fixed step and a fixed time, and when the actual pressure is higher than the second pressure, the dual clutch pressure is reduced according to a fixed step. The fixed step length is the calibration value, which can be set to 0.01-0.05 bar. The fixed time is the calibration value, which can be set to 100-200 ms. The deviation value can be the calibration value, which can be set to 0.01-0.05 bar. The fixed step length and the deviation value are set to the same size. By keeping the fixed step length and the deviation value set to the same size, it can be ensured that the actual pressure of the dual clutch can be adjusted to fall within the range of the deviation value. When the actual pressure of the dual clutch is 4.7 bar, the pressure of the dual clutch can be increased by 0.05 bar every 100 ms according to the fixed step length of 0.05 bar, the fixed time of 100 ms, and the deviation value of 0.05 bar, that is, the pressure of the dual clutch can be continued to increase, increasing by 0.05 bar every 100 ms until the actual pressure of the dual clutch reaches 4.95.

[0072] S205 . When the difference between the actual pressure of the dual clutch and the second pressure is less than a preset difference threshold, obtain a target current.

[0073] The preset difference threshold may refer to a pre-set standard deviation between the actual pressure value and the second pressure value. When the difference between the actual pressure of the dual clutch and the second pressure is less than the preset difference threshold, the target current under the second pressure condition can be obtained.

[0074] S206 , adjusting the pressure of the dual clutch with the first pressure as the target, and obtaining the initial current of the dual clutch when the first pressure is maintained.

[0075] S207, adjusting the dual clutch from the initial current to the target current, and obtaining real-time pressure change data of the dual clutch during the adjustment process.

[0076] S208. Determine the maximum pressure slope according to the real-time pressure change data of the dual clutch.

[0077] S209: Detect whether to adjust the first pressure of the dual clutch half-engagement point according to the maximum pressure slope.

[0078] It can be seen that in this embodiment, by taking the second pressure as the target and making gradual adjustments according to the difference between the actual pressure and the second pressure, the pressure of the dual clutch can be controlled more accurately, the fluctuation in the pressure adjustment process can be reduced, and the pressure control can be more stable; by setting a preset difference threshold, the difference between the actual pressure and the second pressure can be ensured to be small, and the cumulative deviation caused by control errors can be reduced; by adjusting the pressure of the dual clutch in a fixed step-by-step manner so that the actual pressure gradually approaches the second pressure, the instability caused by a sudden and substantial pressure increase can be avoided, the target current under the second pressure can be obtained more accurately, and the correspondence between the current and pressure can be ensured to be more accurate, providing an effective parameter basis for the subsequent dual clutch semi-engagement point self-learning.

[0079] In some embodiments, taking the first pressure as a target, adjusting the pressure of the dual clutch, and obtaining the initial current when the dual clutch maintains the first pressure, include:

[0080] With the first pressure as the target, adjust the pressure of the dual clutch;

[0081] When the pressure of the dual clutch is maintained at the first pressure for a second time, the pressure of the dual clutch is adjusted in a fixed step-by-step manner according to a difference between the actual pressure of the dual clutch and the first pressure;

[0082] When the difference between the actual pressure of the dual clutch and the first pressure is smaller than the difference threshold, the initial current is acquired.

[0083] The second time may refer to a duration during which the pressure of the dual clutch is maintained at the first pressure.

[0084] It can be seen that in this embodiment, by taking the first pressure as the target and maintaining the pressure for a period of time, the initial current in a stable state can be obtained; the current acquisition error caused by instantaneous pressure fluctuations can be reduced, ensuring that the acquired initial current can more accurately reflect the current clutch state, and provide reliable benchmark data for subsequent control; through the fixed step adjustment method, the pressure adjustment process can be made smoother, avoiding errors caused by sudden large adjustments; by controlling the conditions for obtaining the initial current within a specific difference range, it can avoid inaccurate initial current due to incomplete pressure adjustment or premature current acquisition, thereby improving the accuracy of the acquired initial current.

[0085] In some embodiments, adjusting the dual clutch from an initial current to a target current and acquiring real-time pressure change data of the dual clutch during the adjustment process includes:

[0086] The dual clutch command current is controlled to be adjusted from the initial current to the target current according to a fixed slope, and the real-time pressure change data of the dual clutch during the adjustment process is obtained.

[0087] Among them, the fixed slope can mean that the rate of change of the current remains constant during the process of controlling the dual clutch command current. The change of the command current over time is kept linear, that is, the change of the current per unit time remains consistent. By adjusting the initial current to the target current with a fixed slope, sudden changes in the current regulation process can be avoided, the impact or shock that may occur during the pressure adjustment process can be reduced, and the stability and smoothness of the dual clutch during the pressure adjustment process can be ensured.

[0088] Specifically, the dual clutch command current is adjusted from the initial current to the target current according to a fixed slope, and during the adjustment process, the real-time pressure change data of the dual clutch is recorded at each moment in the process.

[0089] It can be seen that in this embodiment, by adopting a fixed slope current adjustment method, the instability caused by current mutation is avoided, the impact on the dual clutch pressure can be reduced, and then the noise and vibration problems may be reduced, making the entire pressure adjustment process smoother; by obtaining real-time pressure change data and combining it with fixed slope current adjustment, the pressure response of the dual clutch under different current conditions can be more accurately reflected, thereby obtaining complete real-time pressure change data of the dual clutch.

[0090] In some embodiments, detecting whether to adjust the first pressure of the half-engagement point of the dual clutch according to the maximum pressure slope includes:

[0091] comparing the maximum pressure slope to a slope threshold;

[0092] When the maximum pressure slope is greater than the slope threshold, increasing the first pressure of the dual clutch half-engagement point;

[0093] When the maximum pressure slope is less than the slope threshold, the first pressure at the dual clutch half-engagement point is reduced.

[0094] The slope threshold may refer to a critical value for determining the pressure change rate. The slope threshold may refer to the upper or lower limit of the actual pressure change rate. The maximum pressure slope is compared with the slope threshold, and the dual clutch half-engagement point is adjusted according to the determination result. When the maximum pressure slope is greater than the slope threshold, the first pressure at the dual clutch half-engagement point is increased, and when the maximum pressure slope is less than the slope threshold, the first pressure at the dual clutch half-engagement point is reduced.

[0095] It can be seen that in this embodiment, by comparing the maximum pressure slope with the slope threshold, it is possible to accurately determine whether the pressure of the dual clutch half-engagement point needs to be adjusted according to the real-time pressure change speed, and automatically optimize the pressure setting of the half-engagement point according to different working conditions, thereby achieving more precise pressure control; by comparing the maximum pressure slope with the slope threshold and adjusting the first pressure in time, it is possible to ensure that the dual clutch can more accurately find the optimal dual clutch half-engagement point pressure during the self-learning process, and the result is more accurate, which can provide a reliable parameter basis for subsequent clutch operations and improve control accuracy and effect.

[0096] In some embodiments, in the first round of the dual clutch half-engagement point self-learning process, the first pressure is determined as the dual clutch half-engagement point pressure.

[0097] In the first round of the dual clutch half-engagement point self-learning process, the initial pressure of the dual clutch half-engagement point cannot be determined due to the lack of historical data. Therefore, the first pressure is determined as the dual clutch half-engagement point pressure.

[0098] It can be seen that in this embodiment, in the first round of the dual-clutch self-learning process, the first pressure is directly determined as the half-engagement point pressure of the dual-clutch, which can provide an initial reference point for the self-learning process in the absence of historical data, thereby speeding up the start of the self-learning process and avoiding tedious repeated measurements or complex calculations, thereby simplifying the learning process and improving efficiency.

[0099] In some embodiments, when the system main oil pressure is set to a maximum value, adjusting the pressure of the dual clutch with the first pressure as a target includes:

[0100] Adjust the system main oil pressure with the maximum value of the system main oil pressure as the target;

[0101] When the system main oil pressure is maintained at the maximum value for the third time, the pressure of the dual clutch is adjusted with the first pressure as the target.

[0102] The third time may refer to the duration during which the system main oil pressure is maintained at the maximum value.

[0103] It can be seen that in this embodiment, by setting the system main oil pressure to the maximum value and maintaining it for a third time, the pressure of the dual clutch is adjusted, a stable pressure environment can be provided for the pressure adjustment of the dual clutch. When the system main oil pressure is stable, the interference of external pressure fluctuations on the pressure adjustment of the dual clutch can be reduced, thereby improving the accuracy of the pressure adjustment of the dual clutch; by setting the maximum value of the system main oil pressure, sufficient pressure supply can be ensured, so that the dual clutch has a faster response ability during the pressure adjustment process, making the pressure adjustment of the dual clutch more timely, reducing the lag effect, and improving the overall performance of the dual clutch, thereby increasing the speed of the overall process.

[0104] In a specific example, Figure 3 This is a flow chart of a pressure control method for a dual clutch half-engagement point provided by an embodiment of the present invention. The specific process is as follows:

[0105] Determine whether to trigger the dual-clutch semi-engagement point self-learning function based on conditions such as transmission oil temperature, driving gear and throttle opening. If the triggering conditions are met, execute the next step. For example, when the transmission oil temperature reaches 40-70°C, the driving gear reaches 3rd gear or above, and the throttle opening remains unchanged, the above conditions need to be met at the same time to trigger the dual-clutch semi-engagement point self-learning function; set the system main oil pressure to the maximum value of the system required oil pressure and the self-learning preset oil pressure, wait for the third time under this condition, and then execute the next step; set the dual-clutch pressure to the initial pressure of the clutch semi-engagement point, where the initial pressure can refer to the first pressure, and wait for a certain time under this condition, and then execute the next step; set the dual-clutch pressure to the target pressure, where the target pressure can refer to the second pressure, and then execute the next step ; According to the difference between the actual pressure and the second pressure of the dual clutch, the dual clutch pressure is adjusted in a fixed step manner until the difference between the actual pressure and the second pressure of the dual clutch is less than the preset difference threshold, and the target current is obtained; the dual clutch pressure is stepped to the initial pressure, and after waiting for a second time under this condition, the next step is performed, and according to the difference between the actual pressure and the first pressure of the dual clutch, the dual clutch pressure is adjusted in a fixed step manner until the difference between the actual pressure and the first pressure of the dual clutch is less than the preset deviation threshold, and the initial current is obtained; the clutch command current is controlled to rise from the initial current to the target current of the clutch half-engagement point, and according to the maximum slope of the actual clutch pressure, the first pressure of the dual clutch half-engagement point is detected whether to adjust; after the first pressure is adjusted, that is, one round of self-learning is completed, the setting of the system main oil pressure is canceled.

[0106] Figure 4The present invention is a schematic diagram of a pressure control device for a half-engagement point of a dual clutch provided in an embodiment of the present invention. The present invention is applicable to the pressure control of a half-engagement point of a dual clutch, the device can execute a pressure control method for a half-engagement point of a dual clutch, and the device can be implemented in the form of hardware and / or software.

[0107] See also Figure 4 The pressure control device of the dual clutch half-engagement point shown in the figure includes: a historical round pressure acquisition module 401, a first pressure target adjustment module 402, a target current acquisition module 403, an initial current acquisition module 404, a current adjustment and pressure data acquisition module 405, a pressure maximum slope determination module 406 and a dual clutch half-engagement point first pressure detection module 407, wherein:

[0108] A historical round pressure acquisition module 401 is used to acquire the first pressure of the historical round during the dual clutch semi-engagement point self-learning process;

[0109] A first pressure target adjustment module 402 is used to adjust the pressure of the dual clutch with the first pressure as the target when the system main oil pressure is set to the maximum value;

[0110] The target current acquisition module 403 is used to adjust the pressure of the dual clutch with the second pressure as the target, and acquire the target current when the dual clutch maintains the second pressure; the second pressure is greater than the first pressure;

[0111] An initial current acquisition module 404 is used to adjust the pressure of the dual clutch with the first pressure as the target, and acquire the initial current when the dual clutch maintains the first pressure;

[0112] The current adjustment and pressure data acquisition module 405 is used to adjust the dual clutch from the initial current to the target current and obtain the real-time pressure change data of the dual clutch during the adjustment process;

[0113] A pressure maximum slope determination module 406, configured to determine a pressure maximum slope according to real-time pressure change data of the dual clutch;

[0114] The dual clutch half-engagement point first pressure detection module 407 is used to detect whether to adjust the first pressure of the dual clutch half-engagement point according to the maximum pressure slope.

[0115] The technical solution of the embodiment of the present invention can improve the stability of the pressure regulation of the dual clutch by acquiring the first pressure of the historical rounds in the self-learning process of the dual clutch semi-engagement point and adjusting the pressure when the system main oil pressure is at the maximum value; by adjusting the pressure of the dual clutch with the second pressure as the target and acquiring the target current when the dual clutch maintains the second pressure, the relationship data between the pressure and the current can be acquired, which is helpful for precise control of the pressure; by adjusting the pressure of the dual clutch again with the first pressure as the target, the initial current when the dual clutch maintains the first pressure is acquired, which provides a data basis for subsequent pressure regulation; by adjusting the dual clutch from the initial current to the target current, the actual change data of the dual clutch pressure can be acquired based on the adjusted current; by analyzing the real-time pressure change data and determining the maximum slope of the pressure, it is helpful to identify whether the adjustment is too fast or too slow, and optimize the pressure control process; by detecting whether the first pressure of the semi-engagement point needs to be adjusted according to the maximum slope of the pressure, over-adjustment or under-adjustment can be effectively avoided, and the precise adjustment of the semi-engagement point can be ensured, thereby improving the smoothness of the vehicle shifting and the driving experience.

[0116] In some embodiments, in terms of adjusting the pressure of the dual clutch with the second pressure as the target, and acquiring the target current of the dual clutch when the second pressure is maintained, the target current acquisition module 403 is specifically used to:

[0117] Targeting the second pressure, adjust the pressure of the dual clutch;

[0118] When the pressure of the dual clutch is maintained at the second pressure for a first time, adjusting the pressure of the dual clutch in a fixed step-by-step manner according to a difference between the actual pressure of the dual clutch and the second pressure;

[0119] When the difference between the actual pressure of the dual clutch and the second pressure is less than a preset difference threshold, the target current is obtained.

[0120] In some embodiments, in terms of adjusting the pressure of the dual clutch with the first pressure as the target and acquiring the initial current when the dual clutch maintains the first pressure, the initial current acquisition module 404 is specifically used to:

[0121] With the first pressure as the target, adjust the pressure of the dual clutch;

[0122] When the pressure of the dual clutch is maintained at the first pressure for a second time, the pressure of the dual clutch is adjusted in a fixed step-by-step manner according to a difference between the actual pressure of the dual clutch and the first pressure;

[0123] When the difference between the actual pressure of the dual clutch and the first pressure is smaller than the difference threshold, the initial current is acquired.

[0124] In some embodiments, in terms of adjusting the dual clutch from the initial current to the target current and acquiring the real-time pressure change data of the dual clutch during the adjustment process, the current adjustment and pressure data acquisition module 405 is specifically used to:

[0125] The dual clutch command current is controlled to be adjusted from the initial current to the target current according to a fixed slope, and the real-time pressure change data of the dual clutch during the adjustment process is obtained.

[0126] In some embodiments, in terms of detecting whether to adjust the first pressure of the dual clutch semi-engagement point according to the maximum pressure slope, the dual clutch semi-engagement point first pressure detection module 407 is specifically used to:

[0127] comparing the maximum pressure slope to a slope threshold;

[0128] When the maximum pressure slope is greater than the slope threshold, increasing the first pressure of the dual clutch half-engagement point;

[0129] When the maximum pressure slope is less than the slope threshold, the first pressure at the dual clutch half-engagement point is reduced.

[0130] In some embodiments, it also includes:

[0131] In the first round of the dual clutch half engagement point self-learning process, the first pressure is determined as the dual clutch half engagement point pressure.

[0132] In some embodiments, when the system main oil pressure is set to a maximum value, the first pressure is used as a target to adjust the pressure of the dual clutch. The first pressure target adjustment module 402 is specifically used to:

[0133] Adjust the system main oil pressure with the maximum value of the system main oil pressure as the target;

[0134] When the system main oil pressure is maintained at the maximum value for the third time, the pressure of the dual clutch is adjusted with the first pressure as the target.

[0135] The pressure control device of the dual clutch half-engagement point provided in the embodiment of the present invention can execute the pressure control method of the dual clutch half-engagement point provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of executing the pressure control method of the dual clutch half-engagement point.

[0136] Figure 5 A schematic structural diagram of a pressure control device for a half-engagement point of a dual clutch provided in an embodiment of the present invention.

[0137] like Figure 5As shown, the pressure control device 500 of the dual clutch half-engagement point includes at least one processor 501, and a memory connected to the at least one processor 501 in communication, such as a read-only memory (ROM) 502, a random access memory (RAM) 503, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 501 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 502 or the computer program loaded from the storage unit 508 to the random access memory (RAM) 503. In the RAM 503, various programs and data required for the operation of the pressure control device 500 of the dual clutch half-engagement point can also be stored. The processor 501, the ROM 502 and the RAM 503 are connected to each other through a bus 504. An input / output (I / O) interface 505 is also connected to the bus 504.

[0138] Multiple components in the pressure control device 500 of the double clutch half-engagement point are connected to the I / O interface 505, including: an input unit 506, such as a keyboard, a mouse, etc.; an output unit 507, such as various types of displays, speakers, etc.; a storage unit 508, such as a disk, an optical disk, etc.; and a communication unit 509, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 509 allows the pressure control device 500 of the double clutch half-engagement point to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0139] The processor 501 may be a variety of general and / or dedicated processing components with processing and computing capabilities. Some examples of the processor 501 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 501 executes the various methods and processes described above, such as a pressure control method for a dual clutch half-engagement point.

[0140] In some embodiments, the pressure control method of the dual clutch half-engagement point may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 508. In some embodiments, part or all of the computer program may be loaded and / or installed on the pressure control device 500 of the dual clutch half-engagement point via the ROM 502 and / or the communication unit 509. When the computer program is loaded into the RAM 503 and executed by the processor 501, one or more steps of the pressure control method of the dual clutch half-engagement point described above may be executed. Alternatively, in other embodiments, the processor 501 may be configured to execute the pressure control method of the dual clutch half-engagement point in any other appropriate manner (e.g., by means of firmware).

[0141] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), complex programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0142] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0143] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0144] To provide interaction with the user, the systems and techniques described herein can be implemented on an operation detection device, the pressure control device of the dual clutch half-engagement point having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or a trackball), through which the user can provide input to the pressure control device of the dual clutch half-engagement point. Other types of devices can also be used to provide interaction with the user; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and the input from the user can be received in any form (including acoustic input, voice input, or tactile input).

[0145] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0146] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The relationship between the client and the server is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or a cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS (Virtual Private Server) services.

[0147] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0148] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pressure control method for a dual clutch semi-engagement point, characterized in that: The method comprises: Obtain the first pressure of the historical rounds during the dual clutch half-engagement point self-learning process; When the system main oil pressure is set to a maximum value, adjusting the pressure of the dual clutch with the first pressure as a target; Taking a second pressure as a target, adjusting the pressure of the dual clutch, and obtaining a target current when the dual clutch is maintained at the second pressure; the second pressure is greater than the first pressure; Taking the first pressure as a target, adjusting the pressure of the dual clutch, and obtaining an initial current when the dual clutch is maintained at the first pressure; adjusting the dual clutch from the initial current to the target current, and acquiring real-time pressure change data of the dual clutch during the adjustment process; determining a maximum pressure slope according to the real-time pressure change data of the dual clutch; According to the maximum pressure slope, it is detected whether to adjust the first pressure of the dual clutch half-engagement point.

2. The method according to claim 1, characterized in that The step of adjusting the pressure of the dual clutch with the second pressure as the target, and obtaining the target current of the dual clutch when the second pressure is maintained, includes: adjusting the pressure of the dual clutch with the second pressure as a target; When the pressure of the dual clutch is maintained at the second pressure for a first time, adjusting the pressure of the dual clutch in a fixed step-by-step manner according to a difference between the actual pressure of the dual clutch and the second pressure; When the difference between the actual pressure of the dual clutch and the second pressure is less than a preset difference threshold, the target current is obtained.

3. The method according to claim 1, characterized in that: The step of adjusting the pressure of the dual clutch with the first pressure as a target and obtaining an initial current of the dual clutch when the dual clutch is maintained at the first pressure includes: Taking the first pressure as a target, adjusting the pressure of the dual clutch; When the pressure of the dual clutch is maintained at the first pressure for a second time, adjusting the pressure of the dual clutch in a fixed step-by-step manner according to a difference between the actual pressure of the dual clutch and the first pressure; When a difference between the actual pressure of the dual clutch and the first pressure is smaller than the difference threshold, an initial current is acquired.

4. The method according to claim 1, characterized in that: The step of adjusting the dual clutch from the initial current to the target current and acquiring real-time pressure change data of the dual clutch during the adjustment process includes: The dual clutch command current is controlled to be adjusted from the initial current to the target current according to a fixed slope, and real-time pressure change data of the dual clutch during the adjustment process is obtained.

5. The method according to claim 1, characterized in that The detecting whether to adjust the first pressure of the dual clutch half-engagement point according to the maximum pressure slope includes: comparing the maximum pressure slope with a slope threshold; When the maximum pressure slope is greater than the slope threshold, increasing the first pressure at the half-engagement point of the dual clutch; When the maximum pressure slope is less than the slope threshold, the first pressure at the dual clutch half-engagement point is reduced.

6. The method according to claim 1, characterized in that Also includes: In the first round of the dual clutch half-engagement point self-learning process, the first pressure is determined as the dual clutch half-engagement point pressure.

7. The method according to claim 1, characterized in that When the system main oil pressure is set to a maximum value, adjusting the pressure of the dual clutch with the first pressure as a target includes: Taking the maximum value of the main oil pressure of the system as a target, adjusting the main oil pressure of the system; When the system main oil pressure is maintained at the maximum value for a third time, the pressure of the dual clutch is adjusted with the first pressure as a target.

8. A pressure control device for a dual clutch half-engagement point, characterized in that: The device comprises: A historical round pressure acquisition module is used to obtain the first pressure of the historical round during the dual clutch half-engagement point self-learning process; a first pressure target adjustment module, configured to adjust the pressure of the dual clutch with the first pressure as the target when the system main oil pressure is set to a maximum value; a target current acquisition module, used to adjust the pressure of the dual clutch with a second pressure as a target, and acquire a target current when the dual clutch is maintained at the second pressure; the second pressure is greater than the first pressure; an initial current acquisition module, used to adjust the pressure of the dual clutch with the first pressure as a target, and acquire an initial current when the dual clutch is maintained at the first pressure; A current adjustment and pressure data acquisition module, used for adjusting the dual clutch from the initial current to the target current, and acquiring real-time pressure change data of the dual clutch during the adjustment process; A pressure maximum slope determination module, used to determine the pressure maximum slope according to the real-time pressure change data of the dual clutch; The dual clutch half-engagement point first pressure detection module is used to detect whether to adjust the first pressure of the dual clutch half-engagement point according to the maximum pressure slope.

9. A pressure control device for a dual clutch half-engagement point, characterized in that: The pressure control device of the dual clutch half-engagement point includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the pressure control method of the dual clutch half-engagement point according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the pressure control of the dual clutch half-engagement point according to any one of claims 1-7 when executed.

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