Pressure control method, device and equipment of double clutch half engagement point and medium

Abstract

The application discloses a pressure control method, device and equipment of a double clutch half combination point and a medium. The method comprises the following steps: obtaining a first pressure of a historical round in a double clutch half combination point self-learning process; adjusting the pressure of the double clutch with the first pressure as a target under the condition that the system main oil pressure is set as a maximum value; adjusting the pressure of the double clutch with a second pressure as a target and obtaining a target current when the double clutch is maintained at the second pressure; adjusting the pressure of the double clutch with the first pressure as a target and obtaining an initial current when the double clutch is maintained at the first pressure; adjusting the double clutch from the initial current to the target current and obtaining real-time pressure change data of the double clutch in the adjustment process; determining a maximum pressure slope according to the real-time pressure change data of the double clutch; and detecting whether the first pressure of the double clutch half combination point is adjusted according to the maximum pressure slope. The embodiment of the application can improve the accuracy of the double clutch half combination point self-learning.

Description

TECHNICAL FIELD

[0001] The present application 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-joining point. BACKGROUND

[0002] With the rapid development of vehicle technology, automatic transmissions have gradually become the mainstream of the vehicle market. As one of the advanced technologies, dual-clutch transmissions have received more and more attention. Dual-clutch semi-joining point self-learning technology can reduce the wear of the clutch.

[0003] At present, the dual-clutch automatic transmission semi-joining point self-learning technology adjusts the position of the clutch joining 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-joining point by monitoring related data has the problems of long learning period and poor adaptability. SUMMARY

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

[0006] In a first aspect, the embodiments of the present application provide a pressure control method for a dual-clutch semi-joining point, which comprises:

[0007] Obtaining a first pressure of a historical round in a dual-clutch semi-joining point self-learning process;

[0008] Adjusting the pressure of the dual clutch with the first pressure as the target under the condition that the system main oil pressure is set to the maximum value;

[0009] Adjusting the pressure of the dual clutch with the second pressure as the target and obtaining a target current when the dual clutch is maintained at the second pressure; the second pressure is greater than the first pressure;

[0010] Adjusting the pressure of the dual clutch with the first pressure as the target and obtaining an initial current when the dual clutch is maintained at the first pressure;

[0011] Adjusting the dual clutch from the initial current to the target current and obtaining real-time pressure change data of the dual clutch in the adjustment process;

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

[0013] Detecting whether the first pressure of the dual-clutch semi-joining point is adjusted according to the maximum pressure slope.

[0014] In a second aspect, the embodiments of the present application further provide a pressure control device for a dual clutch semi-joining point, the device comprising:

[0015] a historical round pressure acquisition module configured to acquire a first pressure of a historical round in a dual clutch semi-joining point self-learning process;

[0016] a first pressure target adjustment module configured to adjust the pressure of the dual clutch with the first pressure as a target when a system main oil pressure is set as a maximum value;

[0017] a target current acquisition module configured to adjust the pressure of the dual clutch with the 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;

[0018] an initial current acquisition module configured 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;

[0019] a current adjustment and pressure data acquisition module configured to adjust the dual clutch from the initial current to the target current and acquire real-time pressure change data of the dual clutch in the adjustment process;

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

[0021] a dual clutch semi-joining point first pressure detection module configured to detect whether to adjust the first pressure of the dual clutch semi-joining point according to the pressure maximum slope.

[0022] In a third aspect, the embodiments of the present application further provide a pressure control device for a dual clutch semi-joining point, the device comprising:

[0023] at least one processor; and

[0024] a memory in communication with the at least one processor; wherein

[0025] 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 to enable the at least one processor to execute the pressure control method for a dual clutch semi-joining point according to any one of the embodiments of the present application.

[0026] In a fourth aspect, the embodiments of the present application further provide a computer readable storage medium storing computer instructions, and the computer instructions are used to enable a processor to implement the pressure control method for a dual clutch semi-joining point according to any one of the embodiments of the present application when executed by the processor.

[0027] The technical scheme of the embodiment of the application can improve the stability of the pressure adjustment of the dual clutch by acquiring the first pressure of the historical round in the self-learning process of the half combination point of the dual clutch and adjusting the pressure under the condition of the maximum value of the system main oil pressure, can acquire the relationship data between the pressure and the current 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, can help accurately control the pressure, can acquire the actual change data of the pressure of the dual clutch based on the adjustment current by adjusting the pressure of the dual clutch from the initial current to the target current, can help identify whether the adjustment is too fast or too slow by analyzing the real-time pressure change data and determining the maximum slope of the pressure, and can optimize the pressure control process, and can effectively avoid over-adjustment or under-adjustment and ensure the accurate adjustment of the half combination point by detecting whether the first pressure of the half combination point needs to be adjusted according to the maximum slope of the pressure, thereby improving the smoothness of gear shifting of the vehicle and the driving experience.

[0028] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the application, nor is it intended to limit the scope of the application. Other features of the application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0030] Figure 1 A flowchart of a pressure control method for a half combination point of a dual clutch provided by the embodiment of the application is shown in the figure.

[0031] Figure 2 A flowchart of a pressure control method for a half combination point of a dual clutch provided by the embodiment of the application is shown in the figure.

[0032] Figure 3 A flowchart of a pressure control method for a half combination point of a dual clutch provided by the embodiment of the application is shown in the figure

[0033] Figure 4 A structural schematic diagram of a pressure control device for a half combination point of a dual clutch provided by the embodiment of the application is shown in the figure.

[0034] Figure 5 A structural schematic diagram of a pressure control device for a half combination point of a dual clutch provided by the embodiment of the application is shown in the figure. DETAILED DESCRIPTION

[0035] In order to better understand the technical scheme of the present application, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of the present application.

[0036] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-described accompanying drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units does not necessarily have to be limited to only those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to the process, method, product, or device.

[0037] In the technical scheme of the embodiments of the present application, the acquisition, storage and application of the current double clutch pressure and the like are in line with the relevant legal regulations and do not violate public order and good customs.

[0038] Figure 1 A flowchart of a double clutch semi-joining point pressure control method provided by the embodiments of the present application. The embodiments of the present application can be applicable to the case of double clutch semi-joining point pressure control, and the method can be executed by a double clutch semi-joining point pressure control device, which can be realized in the form of hardware and / or software.

[0039] Referring to Figure 1 The double clutch semi-joining point pressure control method shown includes:

[0040] S101, acquiring a first pressure of a historical round in a double clutch semi-joining point self-learning process.

[0041] The double clutch semi-joining point self-learning process can refer to a process of gradually adjusting the pressure of the double clutch to determine the optimal semi-joining point position of the double clutch according to the actual operating conditions of the vehicle through multiple learning rounds. Self-learning is used to obtain the optimal semi-joining point position of the double clutch under different conditions, so as to improve the smoothness of driving and reduce wear.

[0042] The first pressure can be a pressure value of the dual clutch at a half engagement point. The first pressure is used for adjusting a preliminary reference of the clutch state, and helps to determine a subsequent adjustment direction and amplitude.

[0043] In a specific example, in the self-learning process of the dual clutch at the half engagement point in each round, the vehicle controller software records the pressure value of the dual clutch at the half engagement point obtained after each self-learning. The pressure of the clutch at the half engagement point in the last round in the historical rounds can be used as the first pressure.

[0044] S102, in the case where the system main oil pressure is set to the maximum value, adjusting the pressure of the dual clutch with the first pressure as the target.

[0045] The system main oil pressure can be a basic oil pressure provided by a hydraulic system in the dual clutch. The system main oil pressure is used to control the separation state and the engagement state of the clutch, thereby adjusting the pressure of the dual clutch. The stability and the maximum value of the system main oil pressure determine the action strength and the 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 adjustment of the dual clutch is not affected by external factors. Exemplarily, the maximum value of the system demand oil pressure and the self-learning preset oil pressure can be used as the system main oil pressure, wherein the system demand oil pressure is calculated by other modules such as a gear shifting module and a clutch control module in the vehicle system; the self-learning preset oil pressure can be a preset fixed value, which can be set to 8-20 bar.

[0046] In a specific example, the system main oil pressure is set to the maximum value, and after maintaining the system main oil pressure at 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 a target current when the dual clutch is maintained at the second pressure; the second pressure is greater than the first pressure.

[0048] The second pressure can be 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 can be a current signal used to control the dual clutch. According to the command current, the dual clutch can output a corresponding execution action, so that the dual clutch reaches the corresponding pressure.

[0049] The target current can refer to the control current when the double clutch is maintained at the second pressure. By adjusting the pressure of the double clutch, the pressure of the double clutch reaches the second pressure, and the control current of the current double clutch when the double clutch pressure reaches the second pressure is obtained. For example, the double clutch pressure and the control current have a certain corresponding relationship. With the increase of the current, the amount of hydraulic oil adjusted by the control valve also increases, resulting in the increase of the clutch pressure. Conversely, when the current decreases, the amount of hydraulic oil adjusted by the control valve also decreases, resulting in the decrease of the clutch pressure. For example, when the pressure of the double clutch is 5 bar, the target current is 1.2 A.

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

[0051] The initial current can refer to the control current when the double clutch is maintained at the first pressure. The initial current is used to obtain the current value required when the double clutch is maintained at the first pressure. The initial current reflects the running state of the command current of the double clutch at the first pressure, and the initial current is used as the basic data for the adjustment starting point of the double clutch in the self-learning process. For example, when the pressure of the double clutch at the half-connection point is 2 bar, the initial current is 0.6 A.

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

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

[0054] In a specific example, in the process of the pressure of the double clutch rising from the initial current to the target current, the initial current is 0.6 A, the target current is 1.2 A, the first pressure is 2 bar, and the second pressure is 5 bar. The initial current 0.6 A is raised to the target current 1.2 A, and the pressure of the double clutch will continuously rise from 2 bar to 5 bar, and the real-time pressure change data of the double clutch from 2 bar to 5 bar is obtained.

[0055] S106, determining the maximum pressure slope according to the real-time pressure change data of the double clutch.

[0056] The pressure maximum slope can refer to a slope at which the double clutch pressure change rate reaches a maximum value. The pressure maximum slope reflects the fastest rate of double clutch pressure change. By determining the pressure maximum slope, it can be determined whether the current double clutch half-joining point pressure control is in an optimal state.

[0057] S107, according to the pressure maximum slope, detecting whether to adjust the first pressure of the double clutch half-joining point.

[0058] According to the pressure maximum slope, it is determined whether the pressure at the current double clutch half-joining point state is appropriate, that is, the first pressure is adjusted. When the pressure maximum slope is greater than a preset threshold, the pressure gradient changes too fast, and the first pressure is increased. When the pressure maximum slope is less than the preset threshold, the pressure change gradient is too slow, and the first pressure is reduced.

[0059] The technical scheme of the embodiment of the application can improve the stability of double clutch pressure regulation by obtaining the first pressure of the historical round of the double clutch half-joining point self-learning process and adjusting the pressure under the condition of the maximum system main oil pressure. By adjusting the pressure of the double clutch with the second pressure as the target and obtaining the target current when the double clutch maintains the second pressure, the relationship data between the pressure and the current can be obtained, which helps to accurately control the pressure. By adjusting the pressure of the double clutch with the first pressure as the target and obtaining the initial current when the double clutch maintains the first pressure, data basis is provided for subsequent pressure regulation. By adjusting the double clutch from the initial current to the target current, the actual change data of the double clutch pressure can be obtained based on the adjusted current. By analyzing the real-time pressure change data to determine the pressure maximum slope, it is helpful to identify whether the adjustment is too fast or too slow, and to optimize the pressure control process. By detecting whether to adjust the first pressure of the half-joining point according to the pressure maximum slope, it can effectively avoid over-regulation or under-regulation, ensure the accurate adjustment of the half-joining point, and thus improve the smoothness of vehicle gear shifting and driving experience.

[0060] Figure 2 A flowchart of a double clutch half-joining point pressure control method is provided for the embodiment of the application. The embodiment of the application optimizes and improves the pressure control operation of the double clutch half-joining point on the basis of the above-mentioned embodiment.

[0061] Optionally, the "adjusting the pressure of the dual clutch to target the second pressure, and obtaining the target current when the dual clutch is maintained at the second pressure" is further refined as "adjusting the pressure of the dual clutch to target the second pressure; 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 size 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", so as to perfect the operation of the pressure control of the dual clutch half engagement point.

[0062] It should be noted that the parts not described in detail in the embodiments of the present application can refer to the descriptions of other embodiments.

[0063] Referring to Figure 2 The pressure control method of the dual clutch half engagement point shown includes:

[0064] S201, obtaining a first pressure of a historical round in a dual clutch half engagement point self-learning process.

[0065] S202, adjusting the pressure of the dual clutch to target the first pressure when the system main oil pressure is set to the maximum value.

[0066] S203, adjusting the pressure of the dual clutch to target the second pressure.

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

[0068] S204, 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 size manner according to the difference between the actual pressure of the dual clutch and the second pressure.

[0069] Wherein, the first time can refer to the duration of the pressure of the dual clutch maintained at the second pressure.

[0070] Wherein, the actual pressure can 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 half-union point self-learning of the dual clutch, the first pressure can be 2 bar. After maintaining the pressure of the dual clutch at 2 bar for a certain period of time, the pressure of the dual clutch is set to the second pressure, which can be 5 bar. The pressure of the dual clutch is increased to 5 bar, but the actual pressure of the dual clutch cannot reach 5 bar, i.e. the actual pressure of the dual clutch is 5.3 bar or 4.7 bar, i.e. there is a difference between the actual pressure of the dual clutch and the second preset pressure. 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 manner, i.e. the pressure of the dual clutch is gradually adjusted, and finally the deviation between the actual pressure of the dual clutch and the second pressure is within a preset range. The fixed step manner can mean that when the actual pressure is lower than the second pressure, the pressure of the dual clutch is increased by a fixed step and a fixed time, and when the actual pressure is higher than the second pressure, the pressure of the dual clutch is decreased by a fixed step. The fixed step is a calibrated value, which can be set to 0.01-0.05 bar. The fixed time is a calibrated value, which can be set to 100-200 ms. The deviation value is a calibrated value, which can be set to 0.01-0.05 bar. The fixed step and the deviation value are set to the same size, which can ensure that the actual pressure of the dual clutch is within the range of the deviation value. When the actual pressure of the dual clutch is 4.7 bar, the fixed step is 0.05 bar, the fixed time is 100 ms, and the deviation value is 0.05 bar, i.e. the pressure of the dual clutch is continuously increased 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 the preset difference threshold, obtaining a target current.

[0073] The preset difference threshold can mean a standard deviation value set in advance 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 an initial current of the dual clutch maintained at the first pressure.

[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, determining the maximum pressure slope according to the real-time pressure change data of the dual clutch.

[0077] S209, detecting whether to adjust the first pressure of the double clutch half- engagement point according to the maximum slope of the pressure.

[0078] It can be seen that, in the embodiment, by taking the second pressure as the target and gradually adjusting according to the difference between the actual pressure and the second pressure, the pressure of the double clutch can be more accurately controlled, the fluctuation in the pressure adjustment process can be reduced, and the pressure control can be more stable; by setting the 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 error can be reduced; by adjusting the pressure of the double clutch in the fixed step jump manner, the actual pressure gradually approaches the second pressure, which can avoid the instability caused by sudden and large pressure increase, can more accurately obtain the target current at the second pressure, and can ensure that the correspondence between the current and the pressure is more accurate, thereby providing an effective parameter basis for subsequent double clutch half- engagement point self- learning.

[0079] In some embodiments, adjusting the pressure of the double clutch with the first pressure as the target, and obtaining an initial current when the double clutch is maintained at the first pressure, comprises:

[0080] adjusting the pressure of the double clutch with the first pressure as the target;

[0081] adjusting the pressure of the double clutch in a fixed step jump manner according to the difference between the actual pressure of the double clutch and the first pressure when the pressure of the double clutch is maintained at the first pressure for a second time;

[0082] obtaining the initial current when the difference between the actual pressure of the double clutch and the first pressure is less than the difference threshold.

[0083] The second time can refer to the duration for which the pressure of the double clutch is maintained at the first pressure.

[0084] It can be seen that, in the embodiment, by taking the first pressure as the target and obtaining the initial current in a stable state after maintaining the pressure for a period of time, the error in obtaining the current caused by instantaneous pressure fluctuation can be reduced, and the obtained initial current can more accurately reflect the current clutch state, thereby providing reliable reference data for subsequent control; by the adjustment manner of fixed step jump, the pressure adjustment process can be more stable, and the error caused by sudden and large adjustment can be avoided; by controlling the condition for obtaining the initial current within a specific difference range, the obtained initial current can be more accurate, thereby improving the accuracy of the obtained initial current.

[0085] In some embodiments, adjusting the double clutch from the initial current to the target current, and obtaining real-time pressure change data of the double clutch during the adjustment process, comprises:

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

[0087] The fixed slope can refer to a constant rate of change of the current during the control of the double clutch command current. The amount of change of the command current over time is linear, that is, the amount of 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 adjustment process can be avoided, reducing the impact or shock that may occur during pressure adjustment, and ensuring the stability and smoothness of the double clutch during pressure adjustment.

[0088] Specifically, the double clutch command current is adjusted from the initial current to the target current according to a fixed slope, and real-time pressure change data of the double clutch during the adjustment process is obtained.

[0089] It can be seen that, in this embodiment, by adjusting the current with a fixed slope, the instability caused by sudden changes in the current is avoided, the impact on the pressure of the double clutch is reduced, and thus the noise and vibration problems can be reduced, making the entire pressure adjustment process more stable; by obtaining real-time pressure change data and combining the fixed slope current adjustment, the pressure response of the double clutch under different current conditions can be more accurately reflected, and thus complete real-time pressure change data of the double clutch is obtained.

[0090] In some embodiments, according to the pressure maximum slope, whether to adjust the first pressure of the half-engage point of the double clutch is detected, including:

[0091] Comparing the pressure maximum slope with a slope threshold value;

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

[0093] When the pressure maximum slope is less than the slope threshold value, reducing the first pressure of the half-engage point of the double clutch.

[0094] The slope threshold value can refer to a critical value for judging the speed of pressure change. The slope threshold value can refer to the upper or lower limit of the actual pressure change rate. The pressure maximum slope and the slope threshold value are compared, and the half-engage point of the double clutch is adjusted according to the judgment result. When the pressure maximum slope is greater than the slope threshold value, the first pressure of the half-engage point of the double clutch is increased, and when the pressure maximum slope is less than the slope threshold value, the first pressure of the half-engage point of the double clutch is reduced.

[0095] It can be seen that in the embodiment, by comparing the maximum pressure slope with the slope threshold, it can be accurately judged whether the pressure of the double clutch half combination point needs to be adjusted according to the real-time pressure change speed, and the pressure setting of the half combination point is automatically optimized according to different working states, so as to realize more accurate pressure control; by comparing the maximum pressure slope with the slope threshold and adjusting the first pressure in time, it can ensure that the double clutch finds the best double clutch half combination point pressure more accurately during the self-learning process, the result is more accurate, which can provide reliable parameter basis for subsequent clutch operation, and improve control accuracy and effect.

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

[0097] In the first round of the double clutch half combination point self-learning process, since there is no historical data, the initial pressure of the double clutch half combination point cannot be determined, and therefore the first pressure is determined as the double clutch half combination point pressure.

[0098] It can be seen that in the first round of the double clutch self-learning process, the first pressure is directly determined as the half combination point pressure of the double clutch, which can provide an initial reference point for the self-learning process without historical data, accelerate the start of the self-learning process, avoid tedious repeated measurement or complex calculation, and thus simplify the learning process and improve efficiency.

[0099] In some embodiments, in the case where 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, including:

[0100] Adjusting 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 a third time, the pressure of the double clutch is adjusted with the first pressure as the target.

[0102] The third time can refer to the duration of maintaining the system main oil pressure at the maximum value.

[0103] It can be seen that in the embodiment, by setting the system main oil pressure to the maximum value, and in the mode of adjusting the pressure of the dual clutch after maintaining for a third time, 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 fluctuation 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, it can be ensured that the pressure supply is sufficient, so that the dual clutch has a faster response during the pressure adjustment process, so that the pressure adjustment of the dual clutch is more timely, the hysteresis effect is reduced, and the overall performance of the dual clutch is improved, thereby the speed of the overall process can be improved.

[0104] In a specific example, Figure 3 A flowchart of a pressure control method of a dual clutch half engagement point provided by the embodiment of the application. The specific process is as follows:

[0105] According to the conditions such as the transmission oil temperature, the driving gear position and the throttle opening, it is judged whether the dual clutch half engagement point self-learning function is triggered, if the triggering condition is met, the next operation is performed, for example, when the transmission oil temperature reaches 40-70 DEG C, the driving gear position reaches 3 gears or more, and the throttle opening remains unchanged, the above conditions need to be met at the same time to trigger the dual clutch half engagement point self-learning function; the system main oil pressure is set to the maximum value of the system required oil pressure and the self-learning preset oil pressure, and after waiting for a third time under the condition, the next operation is performed; the dual clutch pressure is set to the initial pressure of the clutch half engagement point, wherein the initial pressure can refer to the first pressure, and after waiting for a certain time under the condition, the next operation is performed; the dual clutch pressure is set to the target pressure, wherein the target pressure can refer to the second pressure, and after waiting for a first time under the condition, the next operation is performed; according to the difference between the actual pressure of the dual clutch and the second pressure, the dual clutch pressure is adjusted in a fixed step jump mode until the difference between the actual pressure of the dual clutch and the second pressure is less than a 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 the condition, the next operation is performed, according to the difference between the actual pressure of the dual clutch and the first pressure, the dual clutch pressure is adjusted in a fixed step jump mode until the difference between the actual pressure of the dual clutch and the first pressure is less than a preset deviation threshold, and the initial current is obtained; the clutch command current is increased from the initial current to the clutch half engagement point target current, and whether the first pressure of the dual clutch half engagement point is adjusted is detected according to the maximum slope of the actual pressure of the clutch; after the first pressure is adjusted, one round of self-learning is completed, and the setting of the system main oil pressure is cancelled.

[0106] Figure 4A structural schematic diagram of a double clutch half combination point pressure control device is provided for an embodiment of the present application. The embodiment of the present application can be applicable to the pressure control of a double clutch half combination point. The device can perform a double clutch half combination point pressure control method. The device can be realized in the form of hardware and / or software.

[0107] Referring to Figure 4 The double clutch half combination point pressure control device shown includes a history 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 double clutch half combination point first pressure detection module 407, wherein,

[0108] The history round pressure acquisition module 401 is configured to acquire a first pressure of a historical round of a double clutch half combination point self-learning process.

[0109] The first pressure target adjustment module 402 is configured to adjust the pressure of the double clutch with the first pressure as a target when the system main oil pressure is set to a maximum value.

[0110] The target current acquisition module 403 is configured to adjust the pressure of the double clutch with a second pressure as a target and acquire a target current of the double clutch maintained at the second pressure; the second pressure is greater than the first pressure.

[0111] The initial current acquisition module 404 is configured to adjust the pressure of the double clutch with the first pressure as a target and acquire an initial current of the double clutch maintained at the first pressure.

[0112] The current adjustment and pressure data acquisition module 405 is configured to adjust the double clutch from the initial current to the target current and acquire real-time pressure change data of the double clutch during the adjustment process.

[0113] The pressure maximum slope determination module 406 is configured to determine a pressure maximum slope according to the real-time pressure change data of the double clutch.

[0114] The double clutch half combination point first pressure detection module 407 is configured to detect whether to adjust the first pressure of the double clutch half combination point according to the pressure maximum slope.

[0115] The technical scheme of the embodiment of the application can improve the stability of the pressure adjustment of the dual clutch by acquiring the first pressure of the historical round in the self-learning process of the half combination point of the dual clutch and adjusting the pressure under the condition of the maximum value of the system main oil pressure; can acquire the relationship data between the pressure and the current 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, which is helpful to accurately control the pressure; can provide a data basis for subsequent pressure adjustment by 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; can acquire the actual change data of the pressure of the dual clutch based on the adjustment current by adjusting the dual clutch from the initial current to the target current; can help to identify whether the adjustment is too fast or too slow by analyzing the real-time pressure change data and determining the maximum slope of the pressure, which is helpful to optimize the pressure control process; and can effectively avoid excessive or insufficient adjustment and ensure the accurate adjustment of the half combination point, thereby improving the smoothness of vehicle shifting and driving experience.

[0116] In some embodiments, in the aspect of 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 target current acquisition module 403 is specifically configured to:

[0117] adjust the pressure of the dual clutch with the second pressure as the target;

[0118] adjust the pressure of the dual clutch in a fixed step jump manner according to the difference between the actual pressure of the dual clutch and the second pressure when the pressure of the dual clutch maintains the second pressure for the first time;

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

[0120] In some embodiments, in the aspect 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 configured to:

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

[0122] adjust the pressure of the dual clutch in a fixed step jump manner according to the difference between the actual pressure of the dual clutch and the first pressure when the pressure of the dual clutch maintains the first pressure for the second time;

[0123] acquire the initial current when the difference between the actual pressure of the dual clutch and the first pressure is less than a difference threshold.

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

[0125] The control double clutch command current is adjusted from an initial current to a target current at a fixed slope, and real-time pressure change data of the double clutch during the adjustment is acquired.

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

[0127] Compare the pressure maximum slope with a slope threshold value;

[0128] When the pressure maximum slope is greater than the slope threshold value, increase the first pressure of the double clutch half engagement point;

[0129] When the pressure maximum slope is less than the slope threshold value, decrease the first pressure of the double clutch half engagement point.

[0130] In some embodiments, further comprising:

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

[0132] In some embodiments, in terms of adjusting the pressure of the double clutch with the first pressure as the target when the system main oil pressure is set to the maximum value, the first pressure target adjustment module 402 is specifically configured 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 a third time, adjust the pressure of the double clutch with the first pressure as the target.

[0135] The double clutch half engagement point pressure control device provided by the embodiments of the present application can perform the double clutch half engagement point pressure control method provided by any of the embodiments of the present application, and has the corresponding function modules and beneficial effects of performing the double clutch half engagement point pressure control method.

[0136] Figure 5 A structural schematic diagram of a double clutch half engagement point pressure control device provided by the embodiments of the present application.

[0137] As Figure 5As shown, the clutch half-engagement point pressure control device 500 includes at least one processor 501, and a memory, such as a read-only memory (ROM) 502, a random access memory (RAM) 503, etc., connected to the at least one processor 501 in communication. The memory stores computer programs executable by the at least one processor. The processor 501 can perform various appropriate actions and processes according to the computer programs stored in the read-only memory (ROM) 502 or loaded from the storage unit 508 into the random access memory (RAM) 503. In the RAM 503, various programs and data required for the operation of the clutch half-engagement point pressure control device 500 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] Various components in the clutch half-engagement point pressure control device 500 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 magnetic 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 clutch half-engagement point pressure control device 500 to exchange information / data with other devices through a computer network, such as the Internet, and / or various telecommunications networks.

[0139] The processor 501 can be various general-purpose and / or special-purpose 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 specialized 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 performs various methods and processes described above, such as the clutch half-engagement point pressure control method.

[0140] In some embodiments, the method of pressure control of a dual clutch half- engagement point can be implemented as a computer program tangibly embodied in a computer readable storage medium, e.g., storage unit 508. In some embodiments, parts or all of the computer program can be loaded and / or installed onto the dual clutch half-engagement point pressure control device 500 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 method of pressure control of a dual clutch half-engagement point described above can be performed. Alternatively, in other embodiments, the processor 501 can be configured to perform the method of pressure control of a dual clutch half-engagement point by way of other means (e.g., by way of firmware).

[0141] Various implementations of the systems and techniques described above can be realized in digital electronic circuitry, integrated circuitry, a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on a chip (SOC), a complex programmable logic device (CPLD), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include implementation in one or more computer programs that are executable and / or interpretable on a programmable system including at least one programmable processor, which can be special or general purpose, coupled to receive data and instructions from, and to transmit data and instructions to, a storage system, at least one input device, and at least one output device.

[0142] Computer programs used to implement the methods of the present application can be written in any combination of one or more programming languages. These computer programs can be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the computer program, when executed, implements the functions / acts specified in the flowcharts and / or block diagrams. The computer program can be executed entirely on a machine, partially on a machine and partially on a remote machine or entirely on a remote machine or server.

[0143] In the context of the present application, a computer-readable storage medium can be a tangible medium that can contain or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. A computer-readable storage medium can include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium can be a machine-readable signal medium. More specific examples of a machine-readable storage medium will include one or more lines of a program of instructions in a transitory signal, a portable computer diskette, 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 disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0144] To provide for interaction with a user, the systems and techniques described here can be implemented on an operating detection device 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) by which the user can provide input to the dual clutch half engagement point pressure control device. Other kinds of devices can be used to provide for interaction with a user as well; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form, including acoustic, speech, or tactile input.

[0145] The systems and techniques described here can be implemented in a computing system that includes a back end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front end component (e.g., a user computer having a graphical user interface or a Web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back end, middleware, or front end components. The components of the system can 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] The computing system can include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system, to solve the defects of large management difficulty and weak business scalability in traditional physical host and VPS (Virtual Private Server) service.

[0147] It should be understood that the various forms of flow shown above can be reordered, added to, or have steps deleted. For example, the steps described in the present application can be performed in parallel, in series, or in a different order, as long as the desired results of the technical solutions of the present application can be achieved, which are not limited herein.

[0148] The above detailed description does not constitute a limitation on the protection scope of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A method of pressure control of a dual clutch half-engagement point, characterized in that The method comprises: acquiring a first pressure of a historical round in a double clutch half combination point self-learning process; adjusting the pressure of the double clutch with the first pressure as a target in the case that the system main oil pressure is set to a maximum value, comprising: adjusting the system main oil pressure with the maximum value of the system main oil pressure as a target; maintaining the third time when the system main oil pressure is at the maximum value, adjusting the pressure of the double clutch with the first pressure as a target; adjusting the pressure of the double clutch with the second pressure as a target, and acquiring a target current when the double clutch is maintained at the second pressure; the second pressure is greater than the first pressure; adjusting the pressure of the double clutch with the first pressure as a target, and acquiring an initial current when the double clutch is maintained at the first pressure; adjusting the double clutch from the initial current to the target current, and acquiring real-time pressure change data of the double clutch in the adjustment process; determining a maximum pressure slope according to the real-time pressure change data of the double clutch; detecting whether to adjust the first pressure of the double clutch half combination point according to the maximum pressure slope, comprising: comparing the maximum pressure slope with a slope threshold; increasing the first pressure of the double clutch half combination point when the maximum pressure slope is greater than the slope threshold; reducing the first pressure of the double clutch half combination point when the maximum pressure slope is less than the slope threshold; determining the first pressure as the double clutch half combination point pressure in the first round of the double clutch half combination point self-learning process.

2. The method of claim 1, wherein, The adjusting the pressure of the double clutch with the second pressure as a target, and acquiring a target current when the double clutch is maintained at the second pressure, comprises: adjusting the pressure of the double clutch with the second pressure as a target; adjusting the pressure of the double clutch in a fixed step mode according to the difference between the actual pressure of the double clutch and the second pressure when the pressure of the double clutch is maintained at the second pressure for a first time; acquiring a target current when the difference between the actual pressure of the double clutch and the second pressure is less than a preset difference threshold.

3. The method of claim 1, wherein, The adjusting the pressure of the double clutch with the first pressure as a target, and acquiring an initial current when the double clutch is maintained at the first pressure, comprises: adjusting the pressure of the double clutch with the first pressure as a target; adjusting the pressure of the double clutch in a fixed step mode according to the difference between the actual pressure of the double clutch and the first pressure when the pressure of the double clutch is maintained at the first pressure for a second time; acquiring an initial current when the difference between the actual pressure of the double clutch and the first pressure is less than a difference threshold.

4. The method of claim 1, wherein, The adjusting the double clutch from the initial current to the target current, and acquiring real-time pressure change data of the double clutch in the adjustment process, comprises: controlling the double clutch command current to adjust from the initial current to the target current in a fixed slope, and acquiring real-time pressure change data of the double clutch in the adjustment process.

5. A pressure control device for a dual clutch half-engagement point, characterized by The device comprises: a historical round pressure obtaining module, configured to obtain a first pressure of a historical round in a double clutch half engagement point self-learning process; a first pressure target adjusting module, configured to adjust the pressure of the double clutch with the first pressure as a target in a case where a system main oil pressure is set as a maximum value, including: adjusting the system main oil pressure with the maximum value of the system main oil pressure as a target; and adjusting the pressure of the double clutch with the first pressure as a target when the system main oil pressure is maintained at the maximum value for a third time; a target current obtaining module, configured to adjust the pressure of the double clutch with a second pressure as a target, and obtain a target current of the double clutch maintained at the second pressure; the second pressure is greater than the first pressure; an initial current obtaining module, configured to adjust the pressure of the double clutch with the first pressure as a target, and obtain an initial current of the double clutch maintained at the first pressure; a current adjusting and pressure data obtaining module, configured to adjust the double clutch from the initial current to the target current, and obtain real-time pressure change data of the double clutch in the adjusting process; a pressure maximum slope determining module, configured to determine a pressure maximum slope according to the real-time pressure change data of the double clutch; a double clutch half engagement point first pressure detecting module, configured to detect whether to adjust the first pressure of the double clutch half engagement point according to the pressure maximum slope, including: comparing the pressure maximum slope with a slope threshold; increasing the first pressure of the double clutch half engagement point when the pressure maximum slope is greater than the slope threshold; and reducing the first pressure of the double clutch half engagement point when the pressure maximum slope is less than the slope threshold; a double clutch half engagement point pressure determining module, configured to determine the first pressure as a double clutch half engagement point pressure in a first round of the double clutch half engagement point self-learning process.

6. A pressure control device of a dual clutch half-engagement point, characterized by, The pressure control device of the double clutch half engagement point comprises: at least one processor; and a memory connected with the at least one processor in communication; 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 to enable the at least one processor to execute the pressure control method of the double clutch half engagement point according to any one of claims 1-4.

7. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer instructions, and the computer instructions are used to enable the processor to execute the pressure control method of the double clutch half engagement point according to any one of claims 1-4 when executed.

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