Pre-filled oil control method, control device, processor and vehicle

Abstract

The present application provides a pre-filling oil control method, a control device, a processor and a vehicle, the method comprising: obtaining a target hydraulic oil temperature, the target hydraulic oil temperature being the hydraulic oil temperature at the moment when the gear of the vehicle is switched to the target gear; determining the corresponding pre-filling oil time according to a hydraulic oil temperature table, and obtaining an initial pre-filling oil time, the pre-filling oil time being the time for pre-filling oil for the clutch of the target gear; when the shifting interval time is less than a calibrated time threshold, determining a first correction coefficient according to the residual friction work, determining a second correction coefficient according to the clutch speed of the target gear, and determining a third correction coefficient according to the shifting interval time; calculating the product of the first correction coefficient, the second correction coefficient, the third correction coefficient and the initial pre-filling oil time, and obtaining a corrected pre-filling oil time; pre-filling oil for the clutch of the target gear according to the corrected pre-filling oil time, thereby solving the problem of large workload for pre-filling oil time correction in the prior art.

Description

Technical Field

[0001] The present application relates to the technical field of pre-charging oil for wet clutches, and in particular, to a control method for pre-charging oil, a control device, a processor, and a vehicle. Background Art

[0002] During two adjacent gearshifts involving the same (overlapping) clutch, for example, when shifting from the first gear and then quickly shifting back to the first gear in a short time, the hydraulic oil in the first-gear clutch has not been drained completely before the next pre-charging of oil starts, and the residual pressure in the clutch may cause excessive pre-charging of oil.

[0003] In the existing wet clutch pre-charging oil technology, only time correction is considered or no correction is considered, and the control effect is not ideal. The method considering time correction requires a large number of calibration tests, thus greatly increasing the human, material resources, and time of developers and testers. Summary of the Invention

[0004] The main object of the present application is to provide a control method for pre-charging oil, a control device, a processor, and a vehicle, so as to at least solve the problem of large workload of pre-charging oil time correction in the prior art.

[0005] To achieve the above object, according to one aspect of the present application, there is provided a control method for pre-charging oil, including: obtaining a target hydraulic oil temperature; wherein, the target hydraulic oil temperature is the hydraulic oil temperature at the moment of switching from other gears to the target gear, the target gear is any gear, and the other gears are the gears other than the target gear; determining a corresponding pre-charging oil time by looking up a table according to the target hydraulic oil temperature to obtain an initial pre-charging oil time; wherein, the pre-charging oil time is the time for pre-charging oil to the clutch of the target gear; in the case that the shift interval time is less than a calibrated time threshold, determining a first correction coefficient according to the residual friction work, determining a second correction coefficient according to the clutch speed of the target gear, and determining a third correction coefficient according to the shift interval time; wherein, the first correction coefficient is the influence coefficient of the residual friction work on the pre-charging oil time, the second correction coefficient is the influence coefficient of the clutch speed of the target gear on the pre-charging oil time, and the third correction coefficient is the influence coefficient of the shift interval time on the pre-charging oil time; calculating the product of the first correction coefficient, the second correction coefficient, the third correction coefficient, and the initial pre-charging oil time to obtain a corrected pre-charging oil time; pre-charging oil to the clutch of the target gear according to the corrected pre-charging oil time.

[0006] Optionally, determining a first correction coefficient according to the residual friction work includes: calculating a target friction work; wherein, the target friction work is the friction work generated by the clutch of the target gear during the process of switching from the target gear to the other gear; calculating the residual friction work according to the target friction work, the target cooling power and the shift interval time; wherein, the target cooling power is the cooling power of the clutch of the target gear; obtaining the first correction coefficient according to the ratio of the residual friction work to the friction work capacity of the clutch of the target gear; wherein, the friction work capacity is the maximum value of the heat generated by the clutch accommodating the friction work.

[0007] Optionally, determining a second correction coefficient according to the rotational speed of the clutch of the target gear includes: obtaining a plurality of out-of-gear moments and corresponding target clutch rotational speeds; wherein, the out-of-gear moment is the moment after switching from the target gear to the other gear, and the target clutch rotational speed is the rotational speed of the clutch of the target gear; determining a target clutch rotational speed function according to the plurality of out-of-gear moments and the corresponding target clutch rotational speeds; wherein, the target clutch rotational speed function is a function of the target clutch rotational speed and time; calculating an integral value of the target clutch rotational speed function in the time period of the shift interval time to obtain a target integral value; calculating a ratio of the target integral value to a calibrated integral threshold value to obtain the second correction coefficient; wherein, the calibrated integral threshold value is the target integral value corresponding to the target clutch rotational speed decreasing to 0 within the shift interval time.

[0008] Optionally, determining a third correction coefficient according to the shift interval time includes: calculating a ratio of the shift interval time to a calibrated time threshold value to obtain the third correction coefficient.

[0009] Optionally, obtaining a target hydraulic oil temperature includes: when the gear is switched to the target gear, reading the indication of a hydraulic oil temperature gauge to obtain the target hydraulic oil temperature.

[0010] Optionally, after determining a corresponding pre-charging oil time according to the hydraulic oil temperature by looking up a table, the method further includes: when the shift interval time is greater than or equal to the calibrated time threshold value, pre-charging the clutch of the target gear according to the initial pre-charging oil time.

[0011] Optionally, before determining the first correction coefficient according to the residual friction work, the method includes: starting timing from a first moment until stopping timing at a second moment to obtain the shift interval time; wherein, the first moment is the moment when switching from the target gear to the other gear, and the second moment is the moment after the first moment when switching from the other gear to the target gear.

[0012] According to another aspect of the present application, a pre-charged oil control device is provided, including: an acquisition unit for acquiring the target hydraulic oil temperature; wherein, the target hydraulic oil temperature is the hydraulic oil temperature at the moment of switching from other gear positions to the target gear position, the target gear position is any one gear position, and the other gear positions are the gear positions other than the target gear position; a first determination unit for determining the corresponding pre-charged oil time by looking up a table according to the target hydraulic oil temperature to obtain the initial pre-charged oil time; wherein, the pre-charged oil time is the time for pre-charging the clutch of the target gear position; a second determination unit for, when the shift interval time is less than the calibrated time threshold, determining a first correction coefficient according to the residual friction work, determining a second correction coefficient according to the clutch speed of the target gear position, and determining a third correction coefficient according to the shift interval time; wherein, the first correction coefficient is the influence coefficient of the residual friction work on the pre-charged oil time, the second correction coefficient is the influence coefficient of the clutch speed of the target gear position on the pre-charged oil time, and the third correction coefficient is the influence coefficient of the shift interval time on the pre-charged oil time; a calculation unit for calculating the product of the first correction coefficient, the second correction coefficient, the third correction coefficient and the initial pre-charged oil time to obtain the corrected pre-charged oil time; a processing unit for pre-charging the clutch of the target gear position according to the corrected pre-charged oil time.

[0013] According to still another aspect of the present application, a computer-readable storage medium is provided, the computer-readable storage medium includes a stored program, wherein, when the program runs, it controls the device where the computer-readable storage medium is located to execute any one of the methods.

[0014] According to yet another aspect of the present application, a processor is provided, the processor is used to run a program, wherein, when the program runs, it executes any one of the above methods.

[0015] According to still another aspect of the present application, a vehicle is provided, including: a clutch, one or more processors, a memory, and one or more programs, wherein, the one or more programs are stored in the memory and are configured to be executed by the one or more processors, and the one or more programs include a control method for performing any one of the pre-charged oil methods.

[0016] Applying the technical solution of the present application in the above pre-charging oil control method, first, obtain the target hydraulic oil temperature, where the target hydraulic oil temperature is the hydraulic oil temperature at the moment when the vehicle gear is switched to the target gear, and the target gear is any gear; then, look up the table according to the hydraulic oil temperature to determine the corresponding pre-charging oil time, and obtain the initial pre-charging oil time, where the pre-charging oil time is the time for pre-charging the clutch of the target gear; after that, when the shift interval time is less than the calibrated time threshold, determine the first correction coefficient according to the residual friction work, determine the second correction coefficient according to the clutch speed of the target gear, and determine the third correction coefficient according to the shift interval time. The first correction coefficient is the influence coefficient of the residual friction work on the pre-charging oil time, the second correction coefficient is the influence coefficient of the clutch speed of the target gear on the pre-charging oil time, and the third correction coefficient is the influence coefficient of the shift interval time on the pre-charging oil time; then, calculate the product of the first correction coefficient, the second correction coefficient, the third correction coefficient and the initial pre-charging oil time to obtain the corrected pre-charging oil time; finally, pre-charge the clutch of the target gear according to the corrected pre-charging oil time. In this pre-charging oil control method, by setting a suitable calibrated time threshold, it is ensured that when the interval time between two adjacent shifts to the target gear is greater than or equal to the calibrated time threshold, when shifting to the target gear for the second time, the oil in the clutch of the target gear is completely drained, otherwise there is oil residue. The residual friction work, the clutch speed of the target gear and the shift interval time all affect the residual amount of the oil. Different residual amounts of the oil require adjustment of the corresponding pre-charging oil time. That is, the influence coefficients of the pre-charging oil time can be determined according to the residual friction work, the clutch speed of the target gear and the shift interval time, so as to correct the initial pre-charging oil time to obtain a more suitable corrected pre-charging oil time, improve the response speed of the clutch and avoid over-pre-charging of the oil. Thus, the pre-charging oil time can be corrected through simple calculations without the need for a large number of calibration tests, solving the problem of large workload for correcting the pre-charging oil time in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings forming a part of this application are used to provide a further understanding of the application. The schematic embodiments and descriptions thereof of the application are used to explain the application and do not constitute an improper limitation of the application. In the drawings:

[0018] Figure 1 The hardware structure block diagram of a mobile terminal showing a control method for performing pre-charging oil provided in an embodiment of the present application is shown;

[0019] Figure 2 The flowchart showing a control method for pre-charging oil provided in an embodiment of the present application is shown;

[0020] Figure 3 Shows a schematic flowchart of calculating a first correction coefficient provided according to an embodiment of the present application;

[0021] Figure 4 Shows a schematic flowchart of calculating a second correction coefficient provided according to an embodiment of the present application;

[0022] Figure 5 Shows a schematic flowchart of calculating a third correction coefficient provided according to an embodiment of the present application;

[0023] Figure 6 Shows a schematic flowchart of another pre - filling oil control method provided according to an embodiment of the present application;

[0024] Figure 7 Shows a schematic flowchart of shift interval time counting provided according to an embodiment of the present application;

[0025] Figure 8 Shows a schematic flowchart of yet another pre - filling oil control method provided according to an embodiment of the present application;

[0026] Figure 9 Shows a schematic diagram of a clutch pressure curve provided according to an embodiment of the present application;

[0027] Figure 10 Shows a block diagram of a pre - filling oil control device provided according to an embodiment of the present application. Detailed implementation manners

[0028] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described 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. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0029] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above - mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so as to describe the embodiments of the present application here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non - exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not necessarily need to be limited to those clearly listed steps or units, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0030] For ease of description, some nouns or terms related to the embodiments of the present application are described below:

[0031] Pre-charge oil: When shifting gears, first pre-charge the clutch of the shifted gear to fill the pipeline with hydraulic oil, eliminate the clearance between the main and driven clutch plates, and improve the response speed of the clutch.

[0032] As introduced in the background art, the workload of pre-charge oil time correction in the prior art is large. To solve this technical problem, the embodiments of the present application provide a control method for pre-charge oil, a control device, a computer-readable storage medium, a processor, and a vehicle.

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention.

[0034] The method embodiments provided in the embodiments of the present application can be executed on a mobile terminal, a computer terminal, or a similar computing device. Taking running on a mobile terminal as an example, Figure 1 is a hardware structure block diagram of a mobile terminal for a control method of pre-charge oil according to an embodiment of the present invention. As Figure 1 shown, the mobile terminal may include one or more ( Figure 1 only one is shown in Figure 1 a processor 102 (the processor 102 may include, but is not limited to, a processing device such as a microprocessor MCU or a programmable logic device FPGA) and a memory 104 for storing data. Among them, the above mobile terminal may further include a transmission device 106 for communication functions and an input / output device 108. Those of ordinary skill in the art can understand that Figure 1 the structure shown is only schematic and does not limit the structure of the above mobile terminal. For example, the mobile terminal may further include more or fewer components than Figure 1 shown, or have a different configuration from

[0035] The memory 104 can be used to store computer programs, such as software programs and modules of application software, like the computer program corresponding to the display method of device information in the embodiments of the present invention. The processor 102 executes various functional applications and data processing by running the computer programs stored in the memory 104, that is, the above-mentioned method is implemented. The memory 104 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memories. In some instances, the memory 104 may further include a memory remotely disposed relative to the processor 102, and these remote memories can be connected to the mobile terminal through a network. Examples of the above-mentioned network include but are not limited to the Internet, enterprise intranet, local area network, mobile communication network, and their combinations. The transmission device 106 is used to receive or send data via a network. Specific examples of the above-mentioned network may include the wireless network provided by the communication provider of the mobile terminal. In one instance, the transmission device 106 includes a network adapter (Network Interface Controller, abbreviated as NIC), which can be connected to other network devices through a base station and thus communicate with the Internet. In one instance, the transmission device 106 may be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0036] In this embodiment, a control method for pre-charging oil running on a mobile terminal, a computer terminal, or a similar computing device is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than here.

[0037] Figure 2 It is a flowchart of the control method for pre-charging oil according to the embodiments of the present application. As Figure 2 shown, the method includes the following steps:

[0038] Step S201, obtain the target hydraulic oil temperature; wherein, the above-mentioned target hydraulic oil temperature is the hydraulic oil temperature at the moment of switching from other gears to the target gear, the above-mentioned target gear is any gear, and the above-mentioned other gears are the gears other than the above-mentioned target gear;

[0039] Specifically, when the gear of the vehicle is switched to the target gear, it is necessary to pre-charge the clutch of the target gear first to improve the clutch response speed. Since the lower the hydraulic oil temperature, the higher the viscosity of the oil, resulting in greater resistance to oil filling, and the pre-charging time needs to be relatively extended. Therefore, it is necessary to obtain the hydraulic oil temperature when the gear of the vehicle is switched to the target gear to determine the appropriate pre-charging time.

[0040] Step S202: Look up the table according to the above target hydraulic oil temperature to determine the corresponding pre-charging oil time, and obtain the initial pre-charging oil time; wherein, the above pre-charging oil time is the time for pre-charging the clutch of the above target gear position.

[0041] Specifically, the pressure of the clutch of the target gear position is constant, and the amount of pre-charging oil is constant. Different hydraulic oil temperatures result in different oil filling resistances, thus resulting in different pre-charging oil times. A comparison table of pre-charging oil times corresponding to multiple hydraulic oil temperatures is determined through calibration tests. Subsequently, the corresponding pre-charging oil time can be directly determined by looking up the table according to the hydraulic oil temperature, without the need for calibration tests anymore.

[0042] Step S203: When the shift interval time is less than the calibrated time threshold, determine the first correction coefficient according to the residual friction work, determine the second correction coefficient according to the rotational speed of the clutch of the above target gear position, and determine the third correction coefficient according to the above shift interval time; wherein, the above residual friction work is the residual amount of the friction work generated when switching from the above target gear position to other gear positions at the moment when the gear position is switched to the above target gear position, the above shift interval time is the interval time between two adjacent shifts to the above target gear position, the above first correction coefficient is the influence coefficient of the above residual friction work on the above pre-charging oil time, the above second correction coefficient is the influence coefficient of the rotational speed of the clutch of the above target gear position on the above pre-charging oil time, and the above third correction coefficient is the influence coefficient of the above shift interval time on the above pre-charging oil time.

[0043] Specifically, when the shift interval time is less than the calibrated time threshold, that is, the interval time between two adjacent shifts to the above target gear position is less than the calibrated time threshold. Shifting out and then shifting into the target gear position in a short time results in the clutch oil of the target gear position not being completely drained. The residual friction work affects the viscosity of the oil, thus affecting the pre-charging oil time. The higher the rotational speed of the clutch of the target gear position, the greater the centrifugal force of the oil, the faster the oil is drained, and the less the residual oil in the clutch, the smaller the influence on the pre-charging oil time. The shift interval time also affects the pre-charging oil time. The shorter the shift interval time, the more residual oil in the clutch, and the greater the influence on the pre-charging oil time. By calculating the influence coefficients of the residual friction work, the rotational speed of the clutch of the target gear position, and the shift interval time on the pre-charging oil time, the initial pre-charging oil time is corrected.

[0044] Step S204: Calculate the product of the above first correction coefficient λ1, the above second correction coefficient λ2, the above third correction coefficient λ3, and the above initial pre-charging oil time T 0 to obtain the corrected pre-charging oil time T, that is, T = T 0 *λ1*λ2*λ3;

[0045] Specifically, the above-mentioned first correction coefficient λ1, the second correction coefficient λ2, and the third correction coefficient λ3 are multiplied to obtain a total correction coefficient λ, which is used to correct the initial pre-charging oil time for pre-charging oil control during gear shifting.

[0046] Step S205: Pre-charge the clutch of the target gear according to the corrected pre-charging oil time.

[0047] Specifically, the clutch control is divided into two control stages: pre-charging oil control and engagement pressure control. During the pre-charging oil control stage, the clutch is filled with oil to gradually increase the clutch control pressure. After the pre-charging oil stage ends, the clutch pressure control stage is entered, and then the gear shift is completed. If there is a gear shift requirement, the current clutch needs to be disengaged, the clutch control oil circuit is depressurized, and the system re-enters the pre-charging time calculation section to calculate the pre-charging oil time for the shifted gear. During the pre-charging oil control stage, the clutch of the target gear is pre-charged with oil according to the corrected pre-charging oil time, which improves the response speed of the clutch and avoids excessive pre-charging of oil.

[0048] In the above pre-charging oil control method, first, the target hydraulic oil temperature is obtained. The target hydraulic oil temperature is the hydraulic oil temperature at the moment of switching from other gear positions to the target gear position. The target gear position is any gear position, and the other gear positions are the gear positions other than the target gear position. Then, the corresponding pre-charging oil time is determined by looking up a table based on the target hydraulic oil temperature to obtain the initial pre-charging oil time. The pre-charging oil time is the time for pre-charging the clutch of the target gear position. After that, when the shift interval time is less than the calibrated time threshold, the first correction coefficient is determined according to the residual friction work, the second correction coefficient is determined according to the clutch speed of the target gear position, and the third correction coefficient is determined according to the shift interval time. The residual friction work is the residual amount of the friction work generated when switching from the target gear position to other gear positions at the moment of switching to the target gear position. The shift interval time is the interval time between two adjacent shifts to the target gear position. The first correction coefficient is the influence coefficient of the residual friction work on the pre-charging oil time, the second correction coefficient is the influence coefficient of the clutch speed of the target gear position on the pre-charging oil time, and the third correction coefficient is the influence coefficient of the shift interval time on the pre-charging oil time. After that, the product of the first correction coefficient, the second correction coefficient, the third correction coefficient, and the initial pre-charging oil time is calculated to obtain the corrected pre-charging oil time. Finally, the clutch of the target gear position is pre-charged according to the corrected pre-charging oil time. In this pre-charging oil control method, by setting a suitable calibrated time threshold, it is ensured that when the interval time between two adjacent shifts to the target gear position is greater than or equal to the calibrated time threshold, when shifting to the target gear position for the second time, the oil in the clutch of the target gear position is completely drained. Otherwise, there will be oil residue. The residual friction work, the clutch speed of the target gear position, and the shift interval time all affect the residual amount of the oil. Different residual amounts of the oil require adjustment of the corresponding pre-charging oil time. That is, the influence coefficients of the pre-charging oil time can be determined according to the residual friction work, the clutch speed of the target gear position, and the shift interval time, so as to correct the initial pre-charging oil time to obtain a more suitable corrected pre-charging oil time, improve the response speed of the clutch while avoiding excessive pre-charging of the oil. Thus, the pre-charging oil time can be corrected through simple calculations without the need for a large number of calibration tests, solving the problem of large workload for correcting the pre-charging oil time in the prior art.

[0049] In the specific implementation process, the above step S203 can be implemented through the following steps. In an alternative solution, in order to reduce the workload of correcting the pre-charging oil time, as Figure 3 shown, in step S203, determining the first correction coefficient according to the residual friction work includes:

[0050] Step S2031: Calculate the target friction work. The target friction work is the friction work generated by the clutch of the target gear during the process of switching from the target gear to the other gear.

[0051] Step S2032: Calculate the remaining friction work based on the target friction work, the target cooling power, and the shift interval time. The target cooling power is the cooling power of the clutch of the target gear.

[0052] Step S2033: Obtain the first correction coefficient according to the ratio of the remaining friction work to the friction work capacity of the clutch of the target gear. The friction work capacity is the maximum value of the heat generated by the clutch to accommodate the friction work.

[0053] In this embodiment, calculate the friction work generated by shifting gears to obtain the target friction work. After shifting out of the gear, subtract the cumulative friction work of the shifted-out gear clutch step by step with the cooling power as the step size. When shifting to the target gear again, calculate the ratio of the remaining friction work of the shifted-in gear clutch to the friction work capacity of the clutch to obtain Δλ1. Finally, obtain the first correction coefficient λ1 = Δλ1. The smaller the remaining friction work, the higher the viscosity of the oil at the clutch, the more oil residue, and the smaller the first correction coefficient λ1, so as to avoid excessive pre-charging of oil. The first correction coefficient can be obtained through simple calculation without the need for calibration tests, reducing the workload of pre-charging oil time correction. In addition, the friction work capacity of the clutch is a fixed value, which can be obtained through experimental testing and then reused.

[0054] In the specific implementation process, the above step S203 can be implemented through the following steps. In an alternative solution, in order to reduce the workload of pre-charging oil time correction, as Figure 4 shown, in step S203, determining the second correction coefficient according to the clutch speed of the target gear includes:

[0055] Step S2034: Obtain multiple out-of-gear moments and the corresponding target clutch speeds. The out-of-gear moment is the moment after switching from the target gear to the other gear, and the target clutch speed is the speed of the clutch of the target gear.

[0056] Step S2035: Determine the target clutch speed function according to multiple out-of-gear moments and the corresponding target clutch speeds. The target clutch speed function is the function of the target clutch speed and time.

[0057] Step S2036: Calculate the integral value of the target clutch speed function in the time period of the shift interval time to obtain the target integral value.

[0058] Step S2037: Calculate the ratio of the above-mentioned target integral value to the calibrated integral threshold to obtain the above-mentioned second correction coefficient. Wherein, the above-mentioned calibrated integral threshold is the above-mentioned target integral value corresponding to the target clutch speed being reduced to 0 within the above-mentioned shift interval time.

[0059] In this embodiment, after the gear is shifted out of the target gear, the speed of the target gear clutch is monitored in real time to obtain the target clutch speed function and integrate it based on time. Calculate the ratio of the integral value to the calibrated threshold to obtain Δλ2. Finally, the second correction coefficient λ2 = Δλ2 is obtained. The smaller the speed of the target gear clutch, the smaller the integral value, the more residual oil, and the smaller the second correction coefficient λ2. The corrected pre-charge oil time is smaller to avoid excessive pre-charge oil. The second correction coefficient can be obtained through simple calculation without the need for calibration tests, reducing the workload of pre-charge oil time correction. In addition, the calibrated threshold is a fixed value, which can be determined through tests and then reused.

[0060] In the specific implementation process, the above-mentioned step S203 can be implemented through the following steps. In an alternative solution, in order to reduce the workload of pre-charge oil time correction, as Figure 5 shown, in step S203, determining the third correction coefficient according to the above-mentioned shift interval time includes:

[0061] Step S2038: Calculate the ratio of the above-mentioned shift interval time to the above-mentioned calibrated time threshold to obtain the above-mentioned third correction coefficient.

[0062] In this embodiment, the above-mentioned calibrated time threshold is the standard time for the clutch of the target gear to drain oil, that is, the corresponding drain time obtained by looking up the hydraulic oil temperature table, which is determined through tests. Calculate the time difference between after the shift ends and when entering the gear again, and obtain the ratio of this time difference to the calibrated time threshold to obtain Δλ3. Finally, the third correction coefficient λ3 = Δλ3. Through the correction of the third correction coefficient, the shorter the shift interval time, the more residual oil, and the smaller the third correction coefficient λ3. The corrected pre-charge oil time is smaller to avoid excessive pre-charge oil. The third correction coefficient can be obtained through simple calculation without the need for calibration tests, reducing the workload of pre-charge oil time correction.

[0063] In the specific implementation process, the above-mentioned step S201 can be implemented through the following steps. In an alternative solution, in order to further ensure the accuracy of the pre-charge oil time, the above-mentioned step S201 includes:

[0064] Step S2011: When the gear is switched to the above-mentioned target gear, read the indication of the hydraulic oil temperature gauge to obtain the above-mentioned target hydraulic oil temperature.

[0065] In this embodiment, when shifting gears, the reading of the hydraulic oil temperature gauge is obtained in real time to obtain the target hydraulic oil temperature, and thus the accurate pre-charging time corresponding to the target hydraulic oil temperature can be obtained, avoiding large errors caused by delays.

[0066] To further reduce the workload, in an alternative solution, as Figure 6 shown, after step S2011, the above method further includes:

[0067] Step S206, when the above shifting interval time is greater than or equal to the above calibration time threshold, pre-charge the clutch of the above target gear according to the above initial pre-charging time.

[0068] In this embodiment, if the above shifting interval time is greater than or equal to the above calibration time threshold, it can be determined that the oil in the clutch will be completely drained, and there is no need to correct the pre-charging time. Of course, there is also no need to correct the pre-charging time for the first engagement of the gear. The correction coefficients are all set to 1, and the clutch of the above target gear can be pre-charged according to the above initial pre-charging time.

[0069] To further ensure the accuracy of the pre-charging time, in an alternative solution, as Figure 7 shown, before determining the first correction coefficient according to the above residual friction work, the above method includes:

[0070] Step S207, start timing from the first moment until the second moment to obtain the above shifting interval time; wherein, the above first moment is the moment when switching from the above target gear to the above other gear, and the above second moment is the moment after the above first moment when switching from the above other gear to the above target gear.

[0071] In this embodiment, the interval time between two adjacent shifts to the target gear is obtained by timing, that is, from the moment when switching from the above target gear to the above other gear to the moment when switching from the above other gear to the above target gear, ensuring the accuracy of the above shifting interval time and further ensuring the accuracy of the pre-charging time.

[0072] To enable those skilled in the art to more clearly understand the technical solution of the present application, the implementation process of the pre-charging control method of the present application will be described in detail below with specific embodiments.

[0073] This embodiment relates to a specific pre-charging control method, as Figure 8 shown, including the following steps:

[0074] Step S1: When the gear is first engaged, the correction coefficients are all set to 1, and the pre-charging time is determined to be the time determined by looking up the table according to the hydraulic oil temperature. When the shifting starts, the control of the clutch is started;

[0075] Step S2: During the gear shifting process, calculate the cumulative friction work of the clutch based on the pressures at both ends of the clutch and the speed difference. Since the hydro-mechanical continuously variable transmission (HMCVT) requires a large transmitted torque, the cumulative friction work generated during the clutch gear shifting process is relatively high. The higher the friction work, the relatively more heat is generated, and the viscosity of the oil at the clutch is relatively low. After the gear is shifted out, subtract the friction work of the shifted-out gear clutch in steps of the cooling power. When shifting gears again, calculate the ratio of the remaining friction work of the shifted-in gear clutch to the total friction work capacity of the clutch to obtain Δλ1, and finally λ1 = 1 - Δλ1;

[0076] Step S3: After gear shifting, the higher the speed of the non-engaged clutch, the greater the centrifugal force of the oil, so the less oil remains in the clutch. Therefore, the integral of the clutch speed with respect to time between two gear shifts also affects the pre-charging time of the oil. Monitor the speed of the shifted-out gear clutch in real time and integrate it based on time. Calculate the ratio of the integral value to the calibrated threshold to obtain Δλ2, and finally λ2 = Δλ2;

[0077] Step S4: After gear shifting, after a period of time for the non-engaged clutch, the oil in the clutch will be completely drained, but the pre-charging time of the oil needs to be corrected before the oil is completely drained. Therefore, calculate the time difference between the end of gear shifting and the second entry into the gear, and obtain the ratio of this time difference to the calibrated time threshold to obtain Δλ3, and finally λ3 = Δλ3;

[0078] Step S5: If the current gear is shifted out and then shifted back in within a short time, first look up the oil temperature to determine the initial pre-charging time T 0 , and correct the initial pre-charging time through the correction coefficient to obtain the final pre-charging time: T = T 0 *λ, where the total correction coefficient λ = λ1 * λ2 * λ3, and use this pre-charging time for gear shifting control.

[0079] It should be noted that, as Figure 9 shown, Curve 1 is the clutch pressure curve of the Ring gear of the vehicle, Curve 2 is the clutch pressure curve of the 1st gear, and the two boxes are respectively the pre-charging time for the first engagement of the Ring gear clutch and the pre-charging time for shifting out and then shifting back into the Ring gear within a short time. The first pre-charging time is longer, and the corrected pre-charging time for shifting out and then shifting back in within a short time is shorter.

[0080] It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. And although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than here.

[0081] The embodiment of the present application also provides a pre-charging oil control device. It should be noted that the pre-charging oil control device of the embodiment of the present application can be used to execute the pre-charging oil control method provided by the embodiment of the present application. The device is used to implement the above embodiments and preferred implementation manners, and those that have been described will not be repeated. As used hereinafter, the term "module" can be a combination of software and / or hardware that can achieve a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware is also possible and contemplated.

[0082] The following introduces the pre-charging oil control device provided by the embodiment of the present application.

[0083] Figure 10 It is a schematic diagram of the pre-charging oil control device according to the embodiment of the present application. As Figure 10 shown, the device includes:

[0084] An acquisition unit 10, configured to acquire the target hydraulic oil temperature; wherein, the target hydraulic oil temperature is the hydraulic oil temperature at the moment of switching from other gears to the target gear, the target gear is any gear, and the other gears are the gears other than the target gear;

[0085] Specifically, when the gear of the vehicle is switched to the target gear, it is necessary to pre-charge the clutch of the target gear first to improve the clutch response speed. Since the lower the hydraulic oil temperature, the higher the viscosity of the oil, resulting in greater resistance to oil filling and a relatively longer pre-charging oil time, it is necessary to acquire the hydraulic oil temperature when the gear of the vehicle is switched to the target gear to determine the appropriate pre-charging oil time.

[0086] A first determination unit 20, configured to look up a table according to the target hydraulic oil temperature to determine the corresponding pre-charging oil time, and obtain the initial pre-charging oil time; wherein, the pre-charging oil time is the time for pre-charging the clutch of the target gear;

[0087] Specifically, the pressure of the clutch of the target gear is constant, and the amount of pre-charging oil is constant. Different hydraulic oil temperatures result in different oil filling resistances, thus resulting in different pre-charging oil times. A look-up table of pre-charging oil times corresponding to multiple hydraulic oil temperatures is determined through calibration tests. Subsequently, the corresponding pre-charging oil time can be directly determined by looking up the table according to the hydraulic oil temperature, without the need for further calibration tests.

[0088] A second determination unit 30, configured to determine a first correction coefficient according to the residual friction work, determine a second correction coefficient according to the clutch speed of the target gear, and determine a third correction coefficient according to the shift interval time when the shift interval time is less than a calibrated time threshold; wherein, the residual friction work is the residual amount of the friction work generated by switching from the target gear to other gears at the moment when the gear is switched to the target gear, the shift interval time is the interval time between two adjacent shifts to the target gear, the first correction coefficient is the influence coefficient of the residual friction work on the pre-charging time, the second correction coefficient is the influence coefficient of the clutch speed of the target gear on the pre-charging time, and the third correction coefficient is the influence coefficient of the shift interval time on the pre-charging time;

[0089] Specifically, when the shift interval time is less than the calibrated time threshold, that is, the interval time between two adjacent shifts to the target gear is less than the calibrated time threshold, shifting out and then shifting into the target gear in a short time results in incomplete draining of the clutch fluid of the target gear. The residual friction work affects the viscosity of the fluid, thereby affecting the pre-charging time. The higher the clutch speed of the target gear, the greater the centrifugal force of the fluid, the faster the draining, the less residual fluid in the clutch, and the smaller the impact on the pre-charging time. The shorter the shift interval time, the more residual fluid in the clutch, the greater the impact on the pre-charging time. By calculating the influence coefficients of the residual friction work, the clutch speed of the target gear, and the shift interval time on the pre-charging time, the initial pre-charging time is corrected.

[0090] A calculation unit 40, configured to calculate the product of the first correction coefficient λ1, the second correction coefficient λ2, the third correction coefficient λ3, and the initial pre-charging time T 0 to obtain a corrected pre-charging time T, that is, T = T 0 *λ1*λ2*λ3;

[0091] Specifically, the first correction coefficient λ1, the second correction coefficient λ2, and the third correction coefficient λ3 are multiplied to obtain a total correction coefficient λ to correct the initial pre-charging time for pre-charging control during shifting.

[0092] A processing unit 50, configured to pre-charge the clutch of the target gear according to the corrected pre-charging time.

[0093] Specifically, the clutch control is divided into two control stages: pre-fill control and engagement pressure control. During the pre-fill control stage, the clutch is filled with oil to gradually increase the clutch control pressure. After the pre-fill stage ends, the clutch pressure control stage is entered, and then the gearshift is completed. If there is a gearshift requirement, the current clutch needs to be disengaged, the clutch control oil circuit is depressurized, and it re-enters the pre-fill time calculation section to calculate the pre-fill time for the shifted gear. During the pre-fill control stage, the clutch of the target gear is pre-filled with oil according to the corrected pre-fill oil time, which improves the response speed of the clutch while avoiding excessive pre-fill oil.

[0094] In the above pre-charging oil control device, an acquisition unit acquires a target hydraulic oil temperature, where the target hydraulic oil temperature is the hydraulic oil temperature at the moment of switching from other gear positions to the target gear position, the target gear position is any gear position, and the other gear positions are the gear positions other than the target gear position; a first determination unit determines a corresponding pre-charging oil time by looking up a table based on the target hydraulic oil temperature to obtain an initial pre-charging oil time, where the pre-charging oil time is the time for pre-charging the clutch of the target gear position; a second determination unit, when the shift interval time is less than a calibrated time threshold, determines a first correction coefficient according to the residual friction work, determines a second correction coefficient according to the clutch speed of the target gear position, and determines a third correction coefficient according to the shift interval time, where the residual friction work is the residual amount of the friction work generated when switching from the target gear position to other gear positions at the moment of switching to the target gear position, the shift interval time is the interval time between two adjacent shifts to the target gear position, the first correction coefficient is the influence coefficient of the residual friction work on the pre-charging oil time, the second correction coefficient is the influence coefficient of the clutch speed of the target gear position on the pre-charging oil time, and the third correction coefficient is the influence coefficient of the shift interval time on the pre-charging oil time; a calculation unit calculates the product of the first correction coefficient, the second correction coefficient, the third correction coefficient, and the initial pre-charging oil time to obtain a corrected pre-charging oil time; a processing unit pre-charges the clutch of the target gear position according to the corrected pre-charging oil time. In this pre-charging oil control device, by setting a suitable calibrated time threshold, it is ensured that when the interval time between two adjacent shifts to the target gear position is greater than or equal to the calibrated time threshold, when shifting to the target gear position for the second time, the oil in the clutch of the target gear position is completely drained. Otherwise, there is oil residue. The residual friction work, the clutch speed of the target gear position, and the shift interval time all affect the residual amount of the oil. Different residual amounts of the oil require adjustment of the corresponding pre-charging oil time. That is, the influence coefficients of the pre-charging oil time can be determined according to the residual friction work, the clutch speed of the target gear position, and the shift interval time, so as to correct the initial pre-charging oil time to obtain a more suitable corrected pre-charging oil time, improve the response speed of the clutch while avoiding excessive pre-charging of the oil, and thus the pre-charging oil time can be corrected through simple calculations without the need for a large number of calibration tests, solving the problem of large workload for correcting the pre-charging oil time in the prior art.

[0095] In the specific implementation process, the function of the second determination unit can be implemented through the following modules. In an alternative solution, in order to reduce the workload of correcting the pre-charging oil time, the second determination unit includes:

[0096] A first calculation module for calculating a target friction work; where the target friction work is the friction work generated by the clutch of the target gear position during the process of switching from the target gear position to the other gear positions;

[0097] A second calculation module, configured to calculate the residual friction work according to the above-mentioned target friction work, target cooling power, and the above-mentioned shift interval time; wherein, the above-mentioned target cooling power is the cooling power of the clutch of the above-mentioned target gear.

[0098] A third calculation module, configured to obtain the above-mentioned first correction coefficient according to the ratio of the above-mentioned residual friction work to the friction work capacity of the clutch of the above-mentioned target gear; wherein, the above-mentioned friction work capacity is the maximum value of the heat generated by the above-mentioned clutch accommodating the above-mentioned friction work.

[0099] In this embodiment, the friction work generated by shifting gears is calculated to obtain the target friction work. After the gear is shifted out, the cumulative friction work of the shifted-out gear clutch is subtracted step by step at the cooling power. When shifting gears to the target gear again, the ratio of the residual friction work of the shifted-in gear clutch to the friction work capacity of the clutch is calculated to obtain Δλ1. Finally, the first correction coefficient λ1 = Δλ1 is obtained. The smaller the residual friction work, the higher the viscosity of the oil at the clutch, the more oil remains, and the smaller the first correction coefficient λ1, so as to avoid excessive pre-charged oil. The first correction coefficient can be obtained through simple calculation without the need for calibration tests, reducing the workload of pre-charged oil time correction. In addition, the friction work capacity of the clutch is a fixed value, which can be obtained through experimental testing and then reused.

[0100] In the specific implementation process, the function of the above-mentioned second determination unit can also be implemented by the following modules. In an alternative solution, in order to reduce the workload of pre-charged oil time correction, the above-mentioned second determination unit includes:

[0101] An acquisition module, configured to acquire a plurality of out-of-gear moments and corresponding target clutch speeds; wherein, the above-mentioned out-of-gear moment is the moment after switching from the above-mentioned target gear to the above-mentioned other gears, and the above-mentioned target clutch speed is the speed of the clutch of the above-mentioned target gear.

[0102] A determination module, configured to determine a target clutch speed function according to the plurality of above-mentioned out-of-gear moments and the corresponding above-mentioned target clutch speeds; wherein, the above-mentioned target clutch speed function is a function of the above-mentioned target clutch speed and time.

[0103] A fourth calculation module, configured to calculate the integral value of the above-mentioned target clutch speed function in the time period of the above-mentioned shift interval time to obtain a target integral value.

[0104] A fifth calculation module, configured to calculate the ratio of the above-mentioned target integral value to a calibrated integral threshold to obtain the above-mentioned second correction coefficient; wherein, the above-mentioned calibrated integral threshold is the above-mentioned target integral value corresponding to the above-mentioned target clutch speed being reduced to 0 within the above-mentioned shift interval time.

[0105] In this embodiment, after shifting out of the target gear position, the rotational speed of the clutch of the target gear position is monitored in real time, the target clutch rotational speed function is obtained and integrated based on time, the ratio of the integral value to the calibration threshold is calculated to obtain Δλ2, and finally the second correction coefficient λ2 = Δλ2 is obtained. The smaller the rotational speed of the clutch of the target gear position, the smaller the integral value, the more residual oil there is, and the smaller the second correction coefficient λ2. The corrected pre-charging oil time is smaller to avoid excessive pre-charging of oil. The second correction coefficient can be obtained through simple calculation without the need for a calibration test, reducing the workload of correcting the pre-charging oil time. In addition, the calibration threshold is a fixed value, which can be determined through tests and then reused.

[0106] In the specific implementation process, the function of the above-mentioned second determination unit can also be implemented by the following modules. In an alternative solution, in order to reduce the workload of correcting the pre-charging oil time, the above-mentioned second determination unit includes:

[0107] A fifth calculation module, configured to calculate the ratio of the above-mentioned shift interval time to the above-mentioned calibration time threshold to obtain the above-mentioned third correction coefficient.

[0108] In this embodiment, the above-mentioned calibration time threshold is the standard time for the clutch of the target gear position to drain oil, that is, the corresponding drain time obtained by looking up the hydraulic oil temperature table, which is determined through tests. Calculate the time difference between after the shift ends and when entering the gear position again, and obtain the ratio of this time difference to the calibration time threshold to obtain Δλ3. Finally, the third correction coefficient λ3 = Δλ3. Through the correction of the third correction coefficient, the shorter the shift interval time, the more residual oil there is, and the smaller the third correction coefficient λ3. The corrected pre-charging oil time is smaller to avoid excessive pre-charging of oil. The third correction coefficient can be obtained through simple calculation without the need for a calibration test, reducing the workload of correcting the pre-charging oil time.

[0109] In the specific implementation process, the above-mentioned acquisition unit can be implemented through the following steps. In an alternative solution, in order to further ensure the accuracy of the pre-charging oil time, the above-mentioned acquisition unit includes:

[0110] A processing module, configured to read the indication of the hydraulic oil temperature table when the gear position is switched to the above-mentioned target gear position to obtain the above-mentioned target hydraulic oil temperature.

[0111] In this embodiment, when shifting gears, the indication of the hydraulic oil temperature table is read in real time to obtain the target hydraulic oil temperature, and the accurate pre-charging oil time corresponding to the target hydraulic oil temperature can be obtained, avoiding large errors caused by delays.

[0112] In order to further reduce the workload, in an alternative solution, the above-mentioned device further includes:

[0113] A reading unit, configured to, after reading the indication of the hydraulic oil temperature gauge to obtain the above-mentioned target hydraulic oil temperature, when the above-mentioned shift interval is greater than or equal to the above-mentioned calibrated time threshold, pre-fill the clutch of the above-mentioned target gear according to the above-mentioned initial pre-fill oil time.

[0114] In this embodiment, if the above-mentioned shift interval is greater than or equal to the above-mentioned calibrated time threshold, it can be determined that the oil in the clutch will be completely drained, and there is no need to correct the pre-fill oil time. Of course, there is also no need to correct the pre-fill oil time for the first engagement of the gear. The correction coefficients are all set to 1, and the clutch of the above-mentioned target gear can be pre-filled with oil according to the above-mentioned initial pre-fill oil time.

[0115] To further ensure the accuracy of the pre-fill oil time, in an alternative solution, the above-mentioned device includes:

[0116] A timing unit, configured to start timing from a first moment until a second moment to obtain the above-mentioned shift interval before determining the first correction coefficient according to the above-mentioned residual friction work; wherein, the above-mentioned first moment is the moment when switching from the above-mentioned target gear to the above-mentioned other gear, and the above-mentioned second moment is the moment after the above-mentioned first moment when switching from the above-mentioned other gear to the above-mentioned target gear.

[0117] In this embodiment, the interval time between two adjacent shifts to the target gear is obtained by timing, that is, from the moment when switching from the above-mentioned target gear to the above-mentioned other gear to the moment when switching from the above-mentioned other gear to the above-mentioned target gear, to ensure the accuracy of the above-mentioned shift interval and further ensure the accuracy of the pre-fill oil time.

[0118] The above-mentioned pre-fill oil control device includes a processor and a memory. The above-mentioned acquisition unit, first determination unit, second determination unit, calculation unit, processing unit, etc. are all stored in the memory as program units, and the processor executes the above-mentioned program units stored in the memory to implement corresponding functions. The above-mentioned modules are all located in the same processor; or, the above-mentioned each module is located in different processors in any combination form.

[0119] The processor contains a kernel, and the kernel retrieves the corresponding program units from the memory. One or more kernels can be set, and by adjusting the kernel parameters, the problem of large workload for correcting the pre-fill oil time in the prior art is solved.

[0120] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of, for example, read-only memory (ROM) or flash memory (flash RAM), and the memory includes at least one storage chip.

[0121] An embodiment of the present invention provides a computer-readable storage medium. The computer-readable storage medium includes a stored program. When the program runs, it controls the device where the computer-readable storage medium is located to execute the control method for pre-charging oil.

[0122] Specifically, the control method for pre-charging oil includes:

[0123] Step S201: Obtain the target hydraulic oil temperature. The target hydraulic oil temperature is the hydraulic oil temperature at the moment of switching from another gear to the target gear. The target gear is any gear, and the other gear is the gear other than the target gear.

[0124] Specifically, when the gear of the vehicle is switched to the target gear, it is necessary to pre-charge the clutch of the target gear first to improve the clutch response speed. Since the lower the hydraulic oil temperature, the higher the viscosity of the oil, resulting in greater resistance to oil filling and a relatively longer pre-charging time, it is necessary to obtain the hydraulic oil temperature when the gear of the vehicle is switched to the target gear to determine the appropriate pre-charging time.

[0125] Step S202: Look up the table according to the target hydraulic oil temperature to determine the corresponding pre-charging time, and obtain the initial pre-charging time. The pre-charging time is the time for pre-charging the clutch of the target gear.

[0126] Specifically, the pressure of the clutch of the target gear is constant, and the amount of pre-charged oil is constant. Different hydraulic oil temperatures result in different oil filling resistances, thus resulting in different pre-charging times. A comparison table of pre-charging times corresponding to multiple hydraulic oil temperatures is determined through calibration tests. Subsequently, the corresponding pre-charging time can be directly determined by looking up the table according to the hydraulic oil temperature, without the need for further calibration tests.

[0127] Step S203: When the shift interval time is less than the calibrated time threshold, determine the first correction coefficient according to the residual friction work amount, determine the second correction coefficient according to the clutch speed of the target gear, and determine the third correction coefficient according to the shift interval time. The residual friction work amount is the residual amount of the friction work generated when switching from the target gear to another gear at the moment when the gear is switched to the target gear. The shift interval time is the interval time between two adjacent shifts to the target gear. The first correction coefficient is the influence coefficient of the residual friction work amount on the pre-charging time. The second correction coefficient is the influence coefficient of the clutch speed of the target gear on the pre-charging time. The third correction coefficient is the influence coefficient of the shift interval time on the pre-charging time.

[0128] Specifically, the shift interval time is less than the calibrated time threshold, that is, the interval time between two adjacent shifts to the above target gear is less than the calibrated time threshold. Shifting out and then shifting into the target gear within a short time results in incomplete draining of the clutch fluid of the target gear. The residual friction work has an impact on the viscosity of the fluid, thereby affecting the pre-charging time. The higher the clutch speed of the target gear, the greater the centrifugal force of the fluid, the faster the oil drainage, and the less residual oil in the clutch, the smaller the impact on the pre-charging time. Also, the shorter the shift interval time, the more residual oil in the clutch, and the greater the impact on the pre-charging time. By calculating the influence coefficients of the residual friction work, the clutch speed of the target gear, and the shift interval time on the pre-charging time, the initial pre-charging time is corrected.

[0129] Step S204, calculate the product of the above first correction coefficient λ1, the above second correction coefficient λ2, the above third correction coefficient λ3, and the above initial pre-charging time T 0 to obtain the corrected pre-charging time T, that is, T = T 0 *λ1*λ2*λ3;

[0130] Specifically, the product of the above first correction coefficient λ1, the above second correction coefficient λ2, and the above third correction coefficient λ3 is the total correction coefficient λ, which is used to correct the initial pre-charging time for pre-charging control during shifting.

[0131] Step S205, pre-charge the clutch of the above target gear according to the above corrected pre-charging time.

[0132] Specifically, the clutch control is divided into two control stages: pre-charging control and engagement pressure control. During the pre-charging control stage, the clutch is filled with oil to gradually increase the clutch control pressure. When the pre-charging stage ends, it enters the clutch pressure control stage and then completes the shift. If there is a shift requirement, the current clutch needs to disengage, the clutch control oil circuit is depressurized, and it re-enters the pre-charging time calculation section to calculate the pre-charging time for the shifted-in gear. During the pre-charging control stage, the clutch of the above target gear is pre-charged according to the above corrected pre-charging time, which improves the response speed of the clutch and avoids excessive pre-charging.

[0133] Optionally, in step S203, determining a first correction coefficient according to the residual friction work mentioned above includes: step S2031, calculating the target friction work, where the target friction work is the friction work generated by the clutch of the target gear during the process of switching from the target gear to the other gear; step S2032, calculating the residual friction work according to the target friction work, the target cooling power, and the shift interval time, where the target cooling power is the cooling power of the clutch of the target gear; step S2033, obtaining the first correction coefficient according to the ratio of the residual friction work to the friction work capacity of the clutch of the target gear, where the friction work capacity is the maximum value of the heat generated by the clutch accommodating the friction work.

[0134] Optionally, in step S203, determining a second correction coefficient according to the rotational speed of the clutch of the target gear includes: step S2034, obtaining a plurality of out-of-gear moments and corresponding target clutch rotational speeds, where the out-of-gear moment is the moment after switching from the target gear to the other gear, and the target clutch rotational speed is the rotational speed of the clutch of the target gear; step S2035, determining a target clutch rotational speed function according to the plurality of out-of-gear moments and the corresponding target clutch rotational speeds, where the target clutch rotational speed function is a function of the target clutch rotational speed and time; step S2036, calculating the integral value of the target clutch rotational speed function in the time period of the shift interval time to obtain a target integral value; step S2037, calculating the ratio of the target integral value to the calibrated integral threshold to obtain the second correction coefficient, where the calibrated integral threshold is the target integral value corresponding to the target clutch rotational speed decreasing to 0 within the shift interval time.

[0135] Optionally, in step S203, determining a third correction coefficient according to the shift interval time includes: step S2038, calculating the ratio of the shift interval time to the calibrated time threshold to obtain the third correction coefficient.

[0136] Optionally, after step S2011, the method further includes: step S206, when the shift interval time is greater than or equal to the calibrated time threshold, pre-charging the clutch of the target gear according to the initial pre-charging oil time.

[0137] Optionally, before determining the first correction coefficient according to the residual friction work, the method includes: step S207, starting timing from the first moment until stopping timing at the second moment to obtain the shift interval time, where the first moment is the moment of switching from the target gear to the other gear, and the second moment is the moment after the first moment and before switching from the other gear to the target gear.

[0138] An embodiment of the present invention provides a processor for running a program, wherein when the program runs, the control method for pre-charging oil is executed.

[0139] Specifically, the control method for pre-charging oil includes:

[0140] Step S201: Obtain the target hydraulic oil temperature, where the target hydraulic oil temperature is the hydraulic oil temperature at the moment of switching from another gear to the target gear, the target gear is any gear, and the other gear is the gear other than the target gear;

[0141] Specifically, when the gear of the vehicle is switched to the target gear, it is necessary to pre-charge the clutch of the target gear first to improve the clutch response speed. Since the lower the hydraulic oil temperature, the higher the viscosity of the oil, resulting in greater resistance to oil filling and a relatively longer pre-charging time, it is necessary to obtain the hydraulic oil temperature when the gear of the vehicle is switched to the target gear to determine the appropriate pre-charging time.

[0142] Step S202: Look up the table according to the target hydraulic oil temperature to determine the corresponding pre-charging time, and obtain the initial pre-charging time, where the pre-charging time is the time for pre-charging the clutch of the target gear;

[0143] Specifically, the pressure of the clutch of the target gear is constant, and the amount of pre-charged oil is constant. Different hydraulic oil temperatures result in different oil filling resistances, thus resulting in different pre-charging times. A comparison table of pre-charging times corresponding to multiple hydraulic oil temperatures is determined through calibration tests. Subsequently, the corresponding pre-charging time can be directly determined by looking up the table according to the hydraulic oil temperature, without the need for further calibration tests.

[0144] Step S203: In the case where the shift interval time is less than the calibrated time threshold, determine the first correction coefficient according to the residual friction work amount, determine the second correction coefficient according to the clutch speed of the target gear, and determine the third correction coefficient according to the shift interval time. The residual friction work amount is the residual amount of the friction work generated when switching from the target gear to another gear at the moment when the gear is switched to the target gear. The shift interval time is the interval time between two adjacent shifts to the target gear. The first correction coefficient is the influence coefficient of the residual friction work amount on the pre-charging time, the second correction coefficient is the influence coefficient of the clutch speed of the target gear on the pre-charging time, and the third correction coefficient is the influence coefficient of the shift interval time on the pre-charging time;

[0145] Specifically, the shift interval time is less than the calibrated time threshold, that is, the interval time between two adjacent shifts to the above target gear is less than the calibrated time threshold. Shifting out and then shifting into the target gear within a short time results in incomplete drainage of the clutch fluid of the target gear. The residual friction work has an impact on the viscosity of the fluid, thereby affecting the pre-charge time. The higher the clutch speed of the target gear, the greater the centrifugal force of the fluid, the faster the oil drainage, the less residual oil in the clutch, and the smaller the impact on the pre-charge time. Also, the shorter the shift interval time, the more residual oil in the clutch, and the greater the impact on the pre-charge time. By calculating the influence coefficients of the residual friction work, the clutch speed of the target gear, and the shift interval time on the pre-charge time, the initial pre-charge time is corrected.

[0146] Step S204, calculate the product of the first correction coefficient λ1, the second correction coefficient λ2, the third correction coefficient λ3, and the initial pre-charge time T 0 to obtain the corrected pre-charge time T, that is, T = T 0 *λ1*λ2*λ3;

[0147] Specifically, the product of the first correction coefficient λ1, the second correction coefficient λ2, and the third correction coefficient λ3 is the total correction coefficient λ, which is used to correct the initial pre-charge time for pre-charge control during shifting.

[0148] Step S205, pre-charge the clutch of the target gear according to the corrected pre-charge time.

[0149] Specifically, the clutch control is divided into two control stages: pre-charge control and engagement pressure control. During the pre-charge control stage, the clutch is filled with oil to gradually increase the clutch control pressure. After the pre-charge stage ends, the clutch pressure control stage is entered and then shifting is completed. If there is a shifting requirement, the current clutch needs to be disengaged, the clutch control oil circuit is depressurized, and it re-enters the pre-charge time calculation section to calculate the pre-charge time for the shifted-in gear. During the pre-charge control stage, the clutch of the target gear is pre-charged according to the corrected pre-charge time, which improves the response speed of the clutch and avoids over-pre-charging.

[0150] Optionally, in step S203, determining a first correction coefficient according to the residual friction work mentioned above includes: step S2031, calculating a target friction work, where the target friction work is the friction work generated by the clutch of the target gear during the process of switching from the target gear to the other gear; step S2032, calculating the residual friction work according to the target friction work, the target cooling power, and the shift interval time, where the target cooling power is the cooling power of the clutch of the target gear; step S2033, obtaining the first correction coefficient according to the ratio of the residual friction work to the friction work capacity of the clutch of the target gear, where the friction work capacity is the maximum value of the heat generated by the clutch accommodating the friction work.

[0151] Optionally, in step S203, determining a second correction coefficient according to the rotational speed of the clutch of the target gear includes: step S2034, obtaining a plurality of out-of-gear moments and corresponding target clutch rotational speeds, where the out-of-gear moment is the moment after switching from the target gear to the other gear, and the target clutch rotational speed is the rotational speed of the clutch of the target gear; step S2035, determining a target clutch rotational speed function according to the plurality of out-of-gear moments and the corresponding target clutch rotational speeds, where the target clutch rotational speed function is a function of the target clutch rotational speed and time; step S2036, calculating the integral value of the target clutch rotational speed function in the time period of the shift interval time to obtain a target integral value; step S2037, calculating the ratio of the target integral value to a calibrated integral threshold to obtain the second correction coefficient, where the calibrated integral threshold is the target integral value corresponding to the target clutch rotational speed decreasing to 0 within the shift interval time.

[0152] Optionally, in step S203, determining a third correction coefficient according to the shift interval time includes: step S2038, calculating the ratio of the shift interval time to a calibrated time threshold to obtain the third correction coefficient.

[0153] Optionally, after step S2011, the method further includes: step S206, when the shift interval time is greater than or equal to the calibrated time threshold, pre-charging the clutch of the target gear according to the initial pre-charging oil time.

[0154] Optionally, before determining the first correction coefficient according to the residual friction work, the method includes: step S207, starting timing from a first moment until stopping timing at a second moment to obtain the shift interval time, where the first moment is the moment of switching from the target gear to the other gear, and the second moment is the moment after the first moment and switching from the other gear to the target gear.

[0155] An embodiment of the present invention provides a vehicle. The device includes a processor, a memory, and a program stored on the memory and executable on the processor. When the processor executes the program, it implements at least the following steps:

[0156] Step S201, obtain the target hydraulic oil temperature. The target hydraulic oil temperature is the hydraulic oil temperature at the moment of switching from another gear to the target gear. The target gear is any gear, and the other gear is a gear other than the target gear;

[0157] Step S202, look up a table according to the target hydraulic oil temperature to determine the corresponding pre-charging oil time, and obtain the initial pre-charging oil time. The pre-charging oil time is the time for pre-charging the clutch of the target gear;

[0158] Step S203, when the shift interval time is less than the calibrated time threshold, determine the first correction coefficient according to the residual friction work, determine the second correction coefficient according to the clutch speed of the target gear, and determine the third correction coefficient according to the shift interval time. The residual friction work is the residual amount of the friction work generated by switching from the target gear to another gear at the moment when the gear is switched to the target gear. The shift interval time is the interval time between two adjacent shifts to the target gear. The first correction coefficient is the influence coefficient of the residual friction work on the pre-charging oil time, the second correction coefficient is the influence coefficient of the clutch speed of the target gear on the pre-charging oil time, and the third correction coefficient is the influence coefficient of the shift interval time on the pre-charging oil time;

[0159] Step S204, calculate the product of the first correction coefficient λ1, the second correction coefficient λ2, the third correction coefficient λ3, and the initial pre-charging oil time T 0 to obtain the corrected pre-charging oil time T, that is, T = T 0 *λ1*λ2*λ3;

[0160] Step S205, pre-charge the clutch of the target gear according to the corrected pre-charging oil time.

[0161] The present application also provides a computer program product, which, when executed on a data processing device, is adapted to execute a program initialized with at least the following method steps:

[0162] Step S201, obtain the target hydraulic oil temperature. The target hydraulic oil temperature is the hydraulic oil temperature at the moment of switching from another gear to the target gear. The target gear is any gear, and the other gear is a gear other than the target gear;

[0163] Step S202: Determine the corresponding pre-charging oil time according to the above target hydraulic oil temperature to obtain the initial pre-charging oil time. The above pre-charging oil time is the time for pre-charging the clutch of the above target gear position;

[0164] Step S203: When the shift interval time is less than the calibrated time threshold, determine the first correction coefficient according to the residual friction work, determine the second correction coefficient according to the clutch speed of the above target gear position, and determine the third correction coefficient according to the above shift interval time. The above residual friction work is the residual amount of the friction work generated by switching from the above target gear position to other gear positions at the moment when the gear position is switched to the above target gear position. The above shift interval time is the interval time between two adjacent shifts to the above target gear position. The above first correction coefficient is the influence coefficient of the above residual friction work on the above pre-charging oil time. The above second correction coefficient is the influence coefficient of the clutch speed of the above target gear position on the above pre-charging oil time. The above third correction coefficient is the influence coefficient of the above shift interval time on the above pre-charging oil time;

[0165] Step S204: Calculate the product of the above first correction coefficient λ1, the above second correction coefficient λ2, the above third correction coefficient λ3 and the above initial pre-charging oil time T 0 to obtain the corrected pre-charging oil time T, that is, T = T 0 *λ1*λ2*λ3;

[0166] Step S205: Pre-charge the clutch of the above target gear position according to the above corrected pre-charging oil time.

[0167] Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device. They can be concentrated on a single computing device or distributed on a network composed of multiple computing devices. They can be implemented by program codes executable by the computing device. Thus, they can be stored in a storage device and executed by the computing device. And in some cases, the steps shown or described can be executed in a different order than here, or they can be separately fabricated into individual integrated circuit modules, or multiple modules or steps among them can be fabricated into a single integrated circuit module to implement. In this way, the present invention is not limited to any specific combination of hardware and software.

[0168] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0169] This application is described with reference to the flowcharts and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It should be understood that each flow and / or block in the flowchart and / or block diagram, and the combination of flows and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processors of general-purpose computers, special-purpose computers, embedded processors, or other programmable data processing devices to generate a machine, such that the instructions executed by the processors of the computer or other programmable data processing devices produce means for implementing the functions specified in one Figure 1 flow or multiple flows and / or blocks Figure 1 block or multiple blocks.

[0170] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory produce a manufactured article including instruction means that implement the functions specified in one Figure 1 flow or multiple flows and / or blocks Figure 1 block or multiple blocks.

[0171] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process, and thus the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one Figure 1 flow or multiple flows and / or blocks Figure 1 block or multiple blocks.

[0172] In a typical configuration, a computing device includes one or more processors (CPUs), an input / output interface, a network interface, and memory.

[0173] The memory may include non-permanent memory in the form of computer-readable media, random access memory (RAM), and / or non-volatile memory such as read-only memory (ROM) or flash RAM. The memory is an example of computer-readable media.

[0174] Computer readable media include permanent and non-permanent, removable and non-removable media that can implement information storage by any method or technology. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined in this article, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0175] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device that includes a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises one..." do not exclude the existence of other identical elements in the process, method, commodity or device that includes the elements.

[0176] From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

[0177] 1) In the pre-charging oil control method of this application, first, obtain the target hydraulic oil temperature. The above target hydraulic oil temperature is the hydraulic oil temperature at the moment of switching from other gears to the target gear. The above target gear is any one gear, and the above other gears are the gears other than the above target gear; then, look up the table according to the above target hydraulic oil temperature to determine the corresponding pre-charging oil time, and obtain the initial pre-charging oil time. The above pre-charging oil time is the time for pre-charging the clutch of the above target gear; after that, when the shift interval time is less than the calibrated time threshold, determine the first correction coefficient according to the residual friction work, determine the second correction coefficient according to the clutch speed of the above target gear, and determine the third correction coefficient according to the above shift interval time. The above residual friction work is the residual amount of the friction work generated by switching from the above target gear to other gears at the moment of switching the gear to the above target gear. The above shift interval time is the interval time between two adjacent shifts to the above target gear. The above first correction coefficient is the influence coefficient of the above residual friction work on the above pre-charging oil time. The above second correction coefficient is the influence coefficient of the clutch speed of the above target gear on the above pre-charging oil time. The above third correction coefficient is the influence coefficient of the above shift interval time on the above pre-charging oil time; after that, calculate the product of the above first correction coefficient, the above second correction coefficient, the above third correction coefficient and the above initial pre-charging oil time to obtain the corrected pre-charging oil time; finally, pre-charge the clutch of the above target gear according to the above corrected pre-charging oil time. In this pre-charging oil control method, by setting a suitable calibrated time threshold, it is ensured that when the interval time between two adjacent shifts to the target gear is greater than or equal to the calibrated time threshold, when shifting to the target gear for the second time, the oil in the clutch of the target gear is completely drained. Otherwise, there is oil residue. The residual friction work, the clutch speed of the target gear and the shift interval time all affect the residual amount of the oil. Different residual amounts of the oil require adjustment of the corresponding pre-charging oil time. That is, the influence coefficients of the pre-charging oil time can be determined according to the residual friction work, the clutch speed of the target gear and the shift interval time, so as to correct the initial pre-charging oil time, obtain a more suitable corrected pre-charging oil time, improve the response speed of the clutch and avoid excessive pre-charging oil. Thus, the pre-charging oil time can be corrected through simple calculations without the need for a large number of calibration tests, solving the problem of large workload for correcting the pre-charging oil time in the prior art.

[0178] 2) In the pre-charged oil control device of the present application, an acquisition unit acquires the target hydraulic oil temperature, where the target hydraulic oil temperature is the hydraulic oil temperature at the moment of switching from other gear positions to the target gear position, the target gear position is any gear position, and the other gear positions are the gear positions other than the target gear position; a first determination unit determines the corresponding pre-charged oil time by looking up a table based on the target hydraulic oil temperature to obtain the initial pre-charged oil time, where the pre-charged oil time is the time for pre-charging the clutch of the target gear position; a second determination unit, when the shift interval time is less than the calibrated time threshold, determines a first correction coefficient according to the residual friction work, determines a second correction coefficient according to the clutch speed of the target gear position, and determines a third correction coefficient according to the shift interval time. The residual friction work is the residual amount of the friction work generated by switching from the target gear position to other gear positions at the moment when the gear position switches to the target gear position. The shift interval time is the interval time between two adjacent shifts to the target gear position. The first correction coefficient is the influence coefficient of the residual friction work on the pre-charged oil time, the second correction coefficient is the influence coefficient of the clutch speed of the target gear position on the pre-charged oil time, and the third correction coefficient is the influence coefficient of the shift interval time on the pre-charged oil time; a calculation unit calculates the product of the first correction coefficient, the second correction coefficient, the third correction coefficient, and the initial pre-charged oil time to obtain the corrected pre-charged oil time; a processing unit pre-charges the clutch of the target gear position according to the corrected pre-charged oil time. In this pre-charged oil control device, by setting an appropriate calibrated time threshold, it is ensured that when the interval time between two adjacent shifts to the target gear position is greater than or equal to the calibrated time threshold, when shifting to the target gear position for the second time, the oil in the clutch of the target gear position is completely drained. Otherwise, there is oil residue. The residual friction work, the clutch speed of the target gear position, and the shift interval time all affect the residual amount of the oil. Different residual amounts of the oil require adjustment of the corresponding pre-charged oil time. That is, the influence coefficients of the pre-charged oil time can be determined according to the residual friction work, the clutch speed of the target gear position, and the shift interval time, so as to correct the initial pre-charged oil time to obtain a more appropriate corrected pre-charged oil time, improve the response speed of the clutch while avoiding excessive pre-charging of the oil, and thus the pre-charged oil time can be corrected through simple calculations without the need for a large number of calibration tests, solving the problem of large workload for correcting the pre-charged oil time in the prior art.

[0179] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for controlling pre-filled oil, characterized in that: include: Obtaining a target hydraulic oil temperature; wherein the target hydraulic oil temperature is the hydraulic oil temperature at the moment of switching from other gears to the target gear, the target gear is any gear, and the other gear is the gear other than the target gear; According to the target hydraulic oil temperature, the corresponding pre-filling oil time is determined by looking up a table, and an initial pre-filling oil time is obtained; wherein the pre-filling oil time is the time for pre-filling the clutch of the target gear position; In the case where the shift interval time is less than the calibrated time threshold, a first correction coefficient is determined according to the residual friction work, a second correction coefficient is determined according to the clutch speed of the target gear, and a third correction coefficient is determined according to the shift interval time; wherein the first correction coefficient is the influence coefficient of the residual friction work on the pre-oil filling time, the second correction coefficient is the influence coefficient of the clutch speed of the target gear on the pre-oil filling time, and the third correction coefficient is the influence coefficient of the shift interval time on the pre-oil filling time; Calculating the product of the first correction coefficient, the second correction coefficient, the third correction coefficient and the initial pre-oil filling time to obtain a corrected pre-oil filling time; The clutch of the target gear is pre-filled with oil according to the corrected pre-filling time.

2. The method according to claim 1, characterized in that Determining a first correction coefficient according to the residual friction work includes: Calculating a target friction work; wherein the target friction work is the friction work generated by the clutch of the target gear during the process of switching from the target gear to the other gear; The residual friction work is calculated according to the target friction work, the target cooling power and the gear shift interval time; wherein the target cooling power is the cooling power of the clutch of the target gear; The first correction coefficient is obtained according to the ratio of the residual friction work to the friction work capacity of the clutch of the target gear; wherein the friction work capacity is the maximum value of the heat generated by the friction work accommodated by the clutch.

3. The method according to claim 1, characterized in that Determining a second correction coefficient according to the clutch speed of the target gear comprises: Acquire multiple out-of-gear moments and corresponding target clutch speeds; wherein the out-of-gear moment is the moment after switching from the target gear to the other gear, and the target clutch speed is the speed of the clutch of the target gear; Determining a target clutch speed function according to a plurality of out-of-gear moments and the corresponding target clutch speeds; wherein the target clutch speed function is a function of the target clutch speed and time; Calculating the integral value of the target clutch speed function in the time period of the shift interval to obtain a target integral value; The second correction coefficient is obtained by calculating the ratio of the target integral value to the calibrated integral threshold value; wherein the calibrated integral threshold value is the target integral value corresponding to the target clutch speed being reduced to 0 within the shift interval time.

4. The method according to claim 1, characterized in that: Determining a third correction coefficient according to the shift interval time includes: The ratio of the gear shift interval time to the calibrated time threshold is calculated to obtain the third correction coefficient.

5. The method according to any one of claims 1 to 4, characterized in that: Get the target hydraulic oil temperature, including: When the gear is switched to the target gear, the indication of the hydraulic oil temperature gauge is read to obtain the target hydraulic oil temperature.

6. The method according to any one of claims 1 to 4, characterized in that: After determining the corresponding pre-filling time according to the hydraulic oil temperature table, the method further includes: When the gear shift interval is greater than or equal to the calibrated time threshold, the clutch of the target gear is pre-filled with oil according to the initial pre-filling oil time.

7. The method according to any one of claims 1 to 4, characterized in that: Before determining the first correction coefficient according to the friction work residual, the method includes: The gear shift interval time is obtained by starting timing from a first moment and stopping timing at a second moment; wherein the first moment is the moment of switching from the target gear to the other gear, and the second moment is the moment of switching from the other gear to the target gear after the first moment.

8. A control device for pre-filling oil, characterized in that: include: An acquisition unit, used for acquiring a target hydraulic oil temperature; wherein the target hydraulic oil temperature is the hydraulic oil temperature at the moment of switching from other gears to the target gear, the target gear is any gear, and the other gear is the gear other than the target gear; A first determining unit is used to determine the corresponding pre-filling oil time by looking up a table according to the target hydraulic oil temperature, and obtain an initial pre-filling oil time; wherein the pre-filling oil time is the time for pre-filling the clutch of the target gear; A second determination unit is used to determine a first correction coefficient according to the residual friction work, determine a second correction coefficient according to the clutch speed of the target gear, and determine a third correction coefficient according to the shift interval when the shift interval is less than a calibrated time threshold; wherein the first correction coefficient is an influence coefficient of the residual friction work on the pre-oil filling time, the second correction coefficient is an influence coefficient of the clutch speed of the target gear on the pre-oil filling time, and the third correction coefficient is an influence coefficient of the shift interval on the pre-oil filling time; a calculation unit, configured to calculate the product of the first correction coefficient, the second correction coefficient, the third correction coefficient and the initial pre-oil filling time to obtain a corrected pre-oil filling time; A processing unit is used to pre-fill the clutch of the target gear according to the corrected pre-fill time.

9. A processor, characterized in that: The processor is used to run a program, wherein the program executes the method according to any one of claims 1 to 7 when running.

10. A vehicle, characterized in that: include: A clutch, one or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and are configured to be executed by the one or more processors, and the one or more programs include a control method for executing the pre-filling oil described in any one of claims 1 to 7.

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