Cooling and lubrication control method, device, oil pump control system and vehicle

Abstract

This application relates to a cooling and lubrication control method, apparatus, oil pump control system, and vehicle. The method includes: acquiring the intermediate shaft speed, friction plate heating power, and lubrication inlet oil temperature corresponding to a target intermediate shaft brake; determining a first initial oil pump speed based on the friction plate heating power and the lubrication inlet oil temperature, and determining a second initial oil pump speed based on the intermediate shaft speed and the lubrication inlet oil temperature; the first initial oil pump speed indicates the minimum oil pump speed required to meet the friction plate cooling requirements; the second initial oil pump speed indicates the minimum initial oil pump speed required to meet the intermediate shaft cooling requirements; and determining a target oil pump speed based on the first and second initial oil pump speeds. This method can improve the operating temperature of the intermediate shaft brake, increase lubrication efficiency, and meet the need for real-time control of the intermediate shaft brake's cooling and lubrication.

Description

Technical Field

[0001] This application relates to the field of transmission cooling technology, and in particular to a cooling and lubrication control method, device, oil pump control system, and vehicle. Background Technology

[0002] An intermediate shaft brake is a device used to control the speed of an intermediate shaft and stabilize the transmission system. It reduces the speed of the intermediate shaft or stops its movement by applying braking force, and is commonly used in high-efficiency transmission systems such as automatic transmissions. Because the brake generates friction and heat during operation, cooling and lubrication of the intermediate shaft actuator are crucial to prevent overheating, reduce wear, extend service life, and ensure efficient system operation.

[0003] Oil pump cooling and lubrication methods deliver lubricating oil to the brake contact surfaces via an oil pump, forming an oil film. This film serves both lubrication and heat dissipation purposes, reducing friction and maintaining a stable operating temperature, thereby improving the reliability and efficiency of the brake. However, current methods for cooling and lubricating intermediate shaft actuators often suffer from insufficient or excessive lubrication, resulting in low lubrication efficiency. Summary of the Invention

[0004] Therefore, it is necessary to provide a cooling and lubrication control method, device, oil pump control system, and vehicle that can improve lubrication efficiency in response to the above-mentioned technical problems.

[0005] Firstly, this application provides a cooling and lubrication control method. The method includes:

[0006] Obtain the intermediate shaft speed, friction plate heating power, and lubrication inlet oil temperature corresponding to the target intermediate shaft brake;

[0007] The initial speed of the first oil pump is determined based on the heating power of the friction plate and the lubrication inlet oil temperature, and the initial speed of the second oil pump is determined based on the speed of the intermediate shaft and the lubrication inlet oil temperature; the initial speed of the first oil pump is used to indicate the minimum oil pump speed required to meet the cooling requirements of the friction plate; the initial speed of the second oil pump is used to indicate the minimum initial speed of the oil pump required to meet the cooling requirements of the intermediate shaft.

[0008] The target speed of the oil pump is determined based on the initial speed of the first oil pump and the initial speed of the second oil pump.

[0009] In one embodiment, determining the target oil pump speed based on the initial speed of the first oil pump and the initial speed of the second oil pump includes:

[0010] Obtain the real-time temperature of the friction plate;

[0011] The real-time temperature of the friction plate is compared with the preset over-temperature threshold of the friction plate to obtain the comparison result;

[0012] The initial speed of the first oil pump is corrected based on the comparison results to obtain the corrected initial speed of the first oil pump, and the target speed of the oil pump is determined based on the corrected initial speed of the first oil pump and the initial speed of the second oil pump.

[0013] In one embodiment, correcting the initial speed of the first oil pump based on the comparison result to obtain the corrected initial speed of the first oil pump includes:

[0014] When the comparison result indicates that the real-time temperature of the friction plate is greater than or equal to the over-temperature threshold of the friction plate, the upper limit value of the oil pump speed is obtained;

[0015] The initial speed of the first oil pump is corrected using the upper limit value of the speed to obtain the corrected initial speed of the first oil pump.

[0016] In one embodiment, correcting the initial speed of the first oil pump based on the comparison result to obtain the corrected initial speed of the first oil pump includes:

[0017] When the comparison result indicates that the real-time temperature of the friction plate is less than the over-temperature threshold of the friction plate, the correction coefficient corresponding to the real-time temperature of the friction plate is obtained;

[0018] The initial speed of the first oil pump is corrected using the correction coefficient to obtain the corrected initial speed of the first oil pump.

[0019] In one embodiment, the lubrication inlet oil temperature is obtained through the following steps:

[0020] Obtain the oil temperature and ambient temperature in the oil pan;

[0021] The lubrication inlet oil temperature is determined by combining the oil temperature of the oil pan and the ambient temperature.

[0022] In one embodiment, the method further includes:

[0023] In the event of an oil pump failure, detect the type of failure the oil pump is experiencing;

[0024] The fault type is sent to the transmission controller, so that the transmission controller determines the target action command based on the fault type and sends the target action command directly to the oil pump motor.

[0025] Secondly, this application also provides a cooling and lubrication control device. The device includes:

[0026] The acquisition module is used to acquire the intermediate shaft speed, friction plate heating power, and lubrication inlet oil temperature corresponding to the target intermediate shaft brake.

[0027] An initial module is used to determine the initial speed of a first oil pump based on the heat generation power of the friction plate and the lubrication inlet oil temperature, and to determine the initial speed of a second oil pump based on the speed of the intermediate shaft and the lubrication inlet oil temperature; the initial speed of the first oil pump is used to indicate the minimum oil pump speed required to meet the cooling requirements of the friction plate; the initial speed of the second oil pump is used to indicate the minimum initial speed of the oil pump required to meet the cooling requirements of the intermediate shaft.

[0028] The target module is used to determine the target speed of the oil pump based on the initial speed of the first oil pump and the initial speed of the second oil pump.

[0029] Thirdly, this application also provides a computer device. The computer device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the steps of the method provided in the first aspect of this application.

[0030] Fourthly, this application also provides a computer-readable storage medium. This computer-readable storage medium stores a computer program thereon, which, when executed by a processor, implements the steps of the method provided in the first aspect of this application.

[0031] Fifthly, this application also provides a computer program product. This computer program product includes a computer program that, when executed by a processor, implements the steps of the method provided in the first aspect of this application.

[0032] Sixthly, this application also provides an oil pump control system, which includes:

[0033] An oil pump controller is used to execute the steps of the method provided in the first aspect of this application and generate control commands based on the target speed of the oil pump;

[0034] An oil pump motor, connected to the oil pump controller, is used to receive control commands from the oil pump controller and adjust the oil pump speed based on the control commands.

[0035] In a seventh aspect, this application also provides a vehicle that includes the oil pump control system provided in the sixth aspect of this application.

[0036] The aforementioned cooling and lubrication control method, device, oil pump control system, and vehicle acquire the intermediate shaft speed, friction plate heating power, and lubrication inlet oil temperature corresponding to the target intermediate shaft brake; determine the initial speed of the first oil pump based on the friction plate heating power and the lubrication inlet oil temperature, and determine the initial speed of the second oil pump based on the intermediate shaft speed and the lubrication inlet oil temperature; the first initial speed of the oil pump is used to indicate the minimum oil pump speed required to meet the friction plate cooling requirements; the second initial speed of the oil pump is used to indicate the minimum initial speed of the oil pump required to meet the intermediate shaft cooling requirements; and the target speed of the oil pump is determined based on the first initial speed of the oil pump and the second initial speed of the oil pump. The cooling and lubrication control method of this application can determine the minimum oil pump speed required to meet the friction plate cooling requirements based on the friction plate heating power and the lubrication inlet oil temperature, and determine the minimum oil pump speed required to meet the intermediate shaft cooling requirements based on the intermediate shaft speed and the lubrication inlet oil temperature, thereby selecting an appropriate cooling and lubrication method according to different operating conditions, and thus meeting the required lubrication oil quantity and lubrication time of the intermediate shaft brake. Therefore, it can improve the operating temperature of the intermediate shaft brake, increase lubrication efficiency, and meet the needs of real-time control of the intermediate shaft brake's cooling and lubrication. Attached Figure Description

[0037] Figure 1 This is a diagram illustrating the application environment of the cooling and lubrication control method in one embodiment;

[0038] Figure 2 This is a flowchart illustrating a cooling and lubrication control method in one embodiment;

[0039] Figure 3 This is a flowchart illustrating the cooling and lubrication control method in another embodiment;

[0040] Figure 4 This is a schematic diagram of the process for determining the lubrication inlet oil temperature in one embodiment;

[0041] Figure 5 This is a schematic diagram of the process for determining the target speed of the oil pump in one embodiment;

[0042] Figure 6 This is a schematic diagram of the fault intervention control process in one embodiment;

[0043] Figure 7 This is a structural block diagram of a cooling and lubrication control device in one embodiment;

[0044] Figure 8 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0046] The cooling and lubrication control method provided in this application embodiment can be applied to, for example... Figure 1 In the application environment shown, the transmission controller, as the core control unit, is responsible for collecting the vehicle's operating status and condition signals. The transmission controller is connected to both the intermediate shaft brake and the motor controller. It can collect relevant parameters from the intermediate shaft brake via signals. Furthermore, the transmission controller can send relevant parameters from the intermediate shaft brake and the vehicle itself to the motor controller. The motor controller determines the oil pump speed based on these parameters and sends control signals to the oil pump motor to adjust the pump speed or its start / stop status.

[0047] Among them, the transmission controller can refer to the transmission control unit (TCU), and the motor controller can refer to the oil pump controller.

[0048] In one embodiment, such as Figure 2 As shown, a cooling and lubrication control method is provided, which is applied to... Figure 1 Taking the motor controller, i.e. the oil pump controller, as an example, the explanation includes the following steps:

[0049] Step 202: Obtain the intermediate shaft speed, friction plate heating power, and lubrication inlet oil temperature corresponding to the target intermediate shaft brake.

[0050] Among them, the friction plate heating power refers to the heating power of the friction plate when it is squeezed during the operation of the intermediate shaft brake, and the lubrication inlet oil temperature refers to the initial temperature at which the lubricating oil begins to enter the intermediate shaft brake.

[0051] Step 204: Determine the initial speed of the first oil pump based on the heating power of the friction plate and the lubrication inlet oil temperature, and determine the initial speed of the second oil pump based on the intermediate shaft speed and the lubrication inlet oil temperature.

[0052] Wherein, the initial speed of the first oil pump is used to indicate the minimum oil pump speed required to meet the cooling requirements of the friction plates; the initial speed of the second oil pump is used to indicate the minimum initial speed of the oil pump required to meet the cooling requirements of the intermediate shaft.

[0053] The oil pump controller in this embodiment can pre-store a first numerical model table, which is used to characterize the mapping relationship between the friction plate heating power, the lubricating oil inlet temperature, and the initial speed of the first oil pump. The first numerical model table can be obtained in advance through experimental calibration. For example, under different friction plate heating power and lubricating oil inlet temperature, the oil pump speed is gradually adjusted, the temperature change of the friction plate is recorded, and the lowest oil pump speed that can maintain the friction plate temperature stability under each set of experimental conditions is found. The first numerical model table is generated with the friction plate heating power and lubricating oil inlet temperature as input variables and the lowest oil pump speed as output variable.

[0054] For example, after acquiring the friction plate heating power and the lubrication inlet oil temperature, the oil pump controller inputs these values ​​into a first numerical model table. Based on the mapping relationship between the friction plate heating power, lubrication inlet oil temperature, and the initial speed of the first oil pump in the first numerical model table, it outputs the initial speed of the first oil pump. Once the oil pump controller obtains the friction plate heating power and the lubrication inlet oil temperature, it can determine the initial speed of the first oil pump based on the numerical model table.

[0055] The oil pump controller in this embodiment can also pre-store a second numerical model table, which is used to characterize the mapping relationship between the intermediate shaft speed, the lubrication inlet oil temperature, and the initial speed of the second oil pump. The second numerical model table can be obtained in advance through experimental calibration. For example, under different intermediate shaft speeds and lubrication inlet oil temperatures, the oil pump speed is gradually adjusted, the temperature change of the intermediate shaft is recorded, and the lowest oil pump speed that can maintain the stability of the intermediate shaft temperature under each set of experimental conditions is found. The second numerical model table is generated with the intermediate shaft speed and lubrication inlet oil temperature as input variables and the lowest oil pump speed as output variable.

[0056] For example, after acquiring the intermediate shaft speed and the lubrication inlet oil temperature, the oil pump controller inputs the intermediate shaft speed and lubrication inlet oil temperature into a second numerical model table. Based on the mapping relationship between the intermediate shaft speed, lubrication inlet oil temperature, and the initial speed of the second oil pump in the second numerical model table, it outputs the initial speed of the second oil pump. Once the oil pump controller obtains the intermediate shaft speed and lubrication inlet oil temperature, it can obtain the initial speed of the second oil pump based on the numerical model table.

[0057] Step 206: Determine the target speed of the oil pump based on the initial speed of the first oil pump and the initial speed of the second oil pump.

[0058] After determining the target speed of the oil pump, the oil pump controller in this embodiment generates a control command based on the target speed and sends the control command to the oil pump motor so that the oil pump motor can adjust the speed or control the start and stop of the oil pump according to the control command.

[0059] In the above-described cooling and lubrication control method, the intermediate shaft speed, friction plate heating power, and lubrication inlet oil temperature corresponding to the target intermediate shaft brake are obtained; the initial speed of the first oil pump is determined based on the friction plate heating power and the lubrication inlet oil temperature, and the initial speed of the second oil pump is determined based on the intermediate shaft speed and the lubrication inlet oil temperature; the first initial speed of the oil pump is used to indicate the minimum oil pump speed required to meet the friction plate cooling requirements; the second initial speed of the oil pump is used to indicate the minimum initial speed of the oil pump required to meet the intermediate shaft cooling requirements; and the target speed of the oil pump is determined based on the first initial speed of the oil pump and the second initial speed of the oil pump. The cooling and lubrication control method of this application embodiment can determine the minimum oil pump speed required to meet the friction plate cooling requirements based on the friction plate heating power and the lubrication inlet oil temperature, and determine the minimum oil pump speed required to meet the intermediate shaft cooling requirements based on the intermediate shaft speed and the lubrication inlet oil temperature, thereby selecting a suitable cooling and lubrication method according to different operating conditions, and thus meeting the requirements of the intermediate shaft brake for lubrication oil quantity and lubrication time. Therefore, it can improve the operating temperature of the intermediate shaft brake, increase lubrication efficiency, and meet the requirements for real-time control of the intermediate shaft brake's cooling and lubrication.

[0060] In one embodiment, please refer to Figure 3 The transmission control unit (TCU) receives signal input of the vehicle's driving status. By judging the working mode of the driving status, it divides the current operating condition into flat road mode, uphill mode and downhill mode, and inputs the signal to the oil pump controller as a start signal to complete the controller initialization and low-level data writing. If there is no fault signal input, the oil pump controller starts the application layer software to realize the cooling and lubrication control of the oil pump to the intermediate shaft brake.

[0061] In one embodiment, please refer to Figure 3 During vehicle operation, the TCU determines the vehicle's operating mode (e.g., flat road, uphill, or downhill) by inputting signals from sensors such as the slope sensor. It then calculates the intermediate shaft deceleration slope to ensure normal vehicle operation by combining the ambient temperature and the oil temperature in the oil pan. (If rapid deceleration is required, a switch control is activated; otherwise, PWM control is activated.) Based on this data, the lubrication inlet oil temperature is calculated. To prevent insufficient brake cooling and lubrication from causing overheating or even failure, the oil pump speed is calculated. The faster the brake requires cooling, the higher the oil pump speed, and vice versa.

[0062] In one embodiment, please refer to Figure 3 The heating power of the friction pads is determined by the air pressure in the brake cylinder.

[0063] The intermediate shaft brake operates by generating braking torque through the compression of the friction pads. Therefore, when the piston operates, the friction pads generate corresponding braking torque as the piston displacement changes. The piston displacement is powered by the air pressure in the brake cylinder. When the friction pads generate braking torque, they also generate heat, and the heat generated by the friction pads can be obtained from the air pressure in the brake cylinder.

[0064] For example, the TCU obtains the cylinder air pressure corresponding to the target intermediate shaft brake and sends the brake cylinder air pressure to the oil pump controller. The oil pump controller obtains the friction plate heating power through the brake cylinder air pressure.

[0065] In one embodiment, please refer to Figure 4 The lubrication inlet oil temperature is obtained through the following steps:

[0066] Step 402: Obtain the oil temperature and ambient temperature of the oil pan lubricating oil.

[0067] Step 404: Determine the lubrication inlet oil temperature by combining the oil temperature of the oil pan and the ambient temperature.

[0068] In this embodiment, the lubrication inlet oil temperature is the initial temperature at which the lubricating oil begins to enter the intermediate shaft brake, and therefore it is related to the intermediate shaft speed and the lubricating oil temperature in the oil pan. To obtain the initial lubricating oil temperature of the intermediate shaft brake in real time, it needs to be calculated based on the intermediate shaft speed and the lubricating oil temperature in the oil pan.

[0069] For example, the oil pump controller has a pre-stored oil temperature value table. When the intermediate shaft speed is not 0, the obtained intermediate shaft speed and oil pan lubricating oil temperature are input into the oil temperature value table, which takes the intermediate shaft speed and oil pan lubricating oil temperature as input and the lubrication inlet oil temperature as output, to obtain the lubrication inlet oil temperature. When the intermediate shaft speed is 0, the average value of the ambient temperature and the oil pan lubricating oil temperature is directly used as the lubrication inlet oil temperature.

[0070] In one optional implementation, the oil pump controller receives the vehicle operating mode transmitted by the TCU. Based on the vehicle's operating mode, and considering the ambient temperature and the lubricating oil temperature in the oil pan, it calculates the intermediate axle deceleration slope necessary for normal vehicle operation. Then, based on the intermediate axle deceleration slope, it determines whether to adopt an intermediate axle brake PWM control strategy or an intermediate axle brake on / off control strategy. Each intermediate axle brake PWM control strategy and intermediate axle brake on / off control strategy corresponds to an oil temperature value table, indicating the relationship between intermediate axle speed, oil pan lubricating oil temperature, and lubrication inlet oil temperature under different control strategies. After determining the control strategy, when the intermediate axle speed is not zero, the oil pump controller selects the corresponding oil temperature value table, using the intermediate axle speed and oil pan lubricating oil temperature as inputs to determine the lubrication inlet oil temperature.

[0071] In one embodiment, such as Figure 5 As shown, determining the target speed of the oil pump based on the initial speed of the first oil pump and the initial speed of the second oil pump includes:

[0072] Step 502: Obtain the real-time temperature of the friction plate.

[0073] Step 504: Compare the real-time temperature of the friction plate with the preset over-temperature threshold of the friction plate to obtain the comparison result.

[0074] Step 506: Correct the initial speed of the first oil pump according to the comparison result to obtain the corrected initial speed of the first oil pump, and determine the target speed of the oil pump according to the corrected initial speed of the first oil pump and the initial speed of the second oil pump.

[0075] Specifically, after obtaining the corrected initial speeds of the first and second oil pumps, the maximum value of the two is taken as the initial speed of the oil pump and input to the oil pump control program to achieve cooling and lubrication regulation of the intermediate shaft brake.

[0076] In one optional implementation, when the comparison result indicates that the real-time temperature of the friction plate is greater than or equal to the friction plate over-temperature threshold, the upper limit value of the oil pump speed is obtained; the upper limit value of the speed is used to correct the initial speed of the first oil pump to obtain the corrected initial speed of the first oil pump.

[0077] For example, to obtain an accurate initial speed of the first oil pump, the real-time temperature of the friction plates needs to be taken into account. First, a friction plate over-temperature threshold is preset. When the real-time temperature of the friction plates is greater than or equal to the friction plate over-temperature threshold, the oil pump operates at its maximum speed.

[0078] In another optional implementation, when the comparison result indicates that the real-time temperature of the friction plate is less than the over-temperature threshold of the friction plate, a correction coefficient corresponding to the real-time temperature of the friction plate is obtained; the correction coefficient is used to correct the initial speed of the first oil pump to obtain the corrected initial speed of the first oil pump.

[0079] Exemplarily, when the real-time temperature of the friction plate is less than or equal to the over-temperature threshold of the friction plate, the temperature part of the friction plate is divided into n temperature intervals, and a correction coefficient Pi is set for each temperature interval, and it satisfies P1 < P2 <... < Pi <... < Pn, where Pi is the correction coefficient of the i-th temperature interval, and the temperature coefficient Pi increases as the temperature of the friction plate rises. The relationship between this temperature coefficient and the friction plate temperature is stored as a two-dimensional table in the control program of the oil pump controller. After the oil pump controller obtains the real-time temperature of the friction plate, the corresponding correction coefficient Pi can be obtained according to the temperature interval where it is located. After obtaining the correction coefficient Pi, the corrected first oil pump speed is obtained according to the modification method After_s = Pi * Before_s; where Before_s is the initial speed of the first oil pump before correction, and After_s is the initial speed of the first oil pump after correction.

[0080] In one embodiment, please refer to Figure 6 , the above cooling and lubrication control method further includes that when a failure occurs in the oil pump, the oil pump controller detects the type of failure of the oil pump; and sends the type of failure to the gearbox controller, so that the gearbox controller determines a target action instruction according to the type of failure, and directly sends the target action instruction to the oil pump motor.

[0081] In the embodiment of the present application, when a failure occurs in the oil pump, the oil pump controller can make a detection in time and send the detected failure signal to the TCU controller. According to different failure signals, the TCU sends corresponding action instructions to the oil pump motor to avoid damaging the intermediate shaft brake.

[0082] Exemplarily, the failure signal and the corresponding TCU controller action instructions include: when the failure flag feedback by the oil pump controller is a stall failure, the TCU controller controls the maximum allowable output torque of the oil pump motor to drop to 0; when the failure flag feedback by the oil pump controller is motor overheat, the TCU controller controls the maximum allowable output torque of the motor to drop to a preset value within a preset time; when the failure flag feedback by the oil pump controller is a failure shutdown, the TCU controller restricts the maximum allowable output torque of the motor to drop to 0.

[0083] In addition, the TCU controller has an oil pump wake-up and sleep strategy, and the working process is as follows: when the vehicle controller VCU is powered on, the TCU controller receives a wake-up signal. When the TCU controller completes initialization, the TCU sends a communication message to wake up the oil pump control system, and the oil pump control system starts to work; when the vehicle controller VCU is powered off, the TCU controller receives a power-off signal. When the oil temperature and the oil pump speed meet the preset conditions, the TCU controller sends a sleep signal to the oil pump control system, and the oil pump control system enters the sleep state.

[0084] Compared to traditional intermediate shaft brake oil pump systems, the control method employed in this application embodiment can select a suitable lubrication method according to different working conditions, thereby adjusting the lubrication method of the intermediate shaft brake during operation. This avoids the problems of insufficient or excessive lubrication that occur in traditional intermediate shaft brake oil pumps, and enables real-time and efficient adjustment of the lubrication state. This improves the braking capacity of the intermediate shaft brake, extends its service life, and meets the system's requirements for the use of the intermediate shaft brake.

[0085] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0086] Based on the same inventive concept, this application also provides a cooling and lubrication control device for implementing the cooling and lubrication control method described above. The solution provided by this device is similar to the solution described in the above method; therefore, the specific limitations in one or more embodiments of the cooling and lubrication control device provided below can be found in the limitations of the cooling and lubrication control method described above, and will not be repeated here.

[0087] In one embodiment, such as Figure 7 As shown, a cooling and lubrication control device is provided, including: an acquisition module 702, an initial module 704, and a target module 706, wherein:

[0088] The acquisition module 702 is used to acquire the intermediate shaft speed, friction plate heating power and lubrication inlet oil temperature corresponding to the target intermediate shaft brake.

[0089] The initial module 704 is used to determine the initial speed of the first oil pump based on the heat generation power of the friction plate and the lubrication inlet oil temperature, and to determine the initial speed of the second oil pump based on the speed of the intermediate shaft and the lubrication inlet oil temperature; the initial speed of the first oil pump is used to indicate the minimum oil pump speed required to meet the cooling requirements of the friction plate; the initial speed of the second oil pump is used to indicate the minimum oil pump speed required to meet the cooling requirements of the intermediate shaft.

[0090] The target module 706 is used to determine the target speed of the oil pump based on the initial speed of the first oil pump and the initial speed of the second oil pump.

[0091] Each module in the aforementioned cooling and lubrication control device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of a computer device in hardware form or independent of it, or stored in the memory of a computer device in software form, so that the processor can call and execute the corresponding operations of each module.

[0092] In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as follows: Figure 8 As shown, this computer device includes a processor, memory, input / output interfaces (I / O), and a communication interface. The processor, memory, and I / O interfaces are connected via a system bus, and the communication interface is also connected to the system bus via the I / O interfaces. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and databases. The internal memory provides the environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The I / O interfaces are used for exchanging information between the processor and external devices. The communication interface is used for communicating with external terminals via a network connection. When the computer program is executed by the processor, it implements a cooling and lubrication control method.

[0093] Those skilled in the art will understand that Figure 8 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0094] In one embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps in the above-described method embodiments.

[0095] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the steps in the above method embodiments.

[0096] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps in the above method embodiments.

[0097] In one embodiment, an oil pump control system is provided, comprising: an oil pump controller for executing the steps in the above method embodiments and generating control commands based on the target oil pump speed; and an oil pump motor connected to the oil pump controller for receiving the control commands from the oil pump controller and adjusting the oil pump speed based on the control commands.

[0098] In one embodiment, a vehicle is provided, including an oil pump control system as described above.

[0099] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of related data must comply with the relevant laws, regulations and standards of the relevant countries and regions.

[0100] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments described above. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0101] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0102] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A cooling and lubrication control method, characterized in that, The method includes: Obtain the intermediate shaft speed, friction plate heating power, and lubrication inlet oil temperature corresponding to the target intermediate shaft brake; The initial speed of the first oil pump is determined based on the heating power of the friction plate and the lubrication inlet oil temperature, and the initial speed of the second oil pump is determined based on the speed of the intermediate shaft and the lubrication inlet oil temperature; the initial speed of the first oil pump is used to indicate the minimum oil pump speed required to meet the cooling requirements of the friction plate; the initial speed of the second oil pump is used to indicate the minimum initial speed of the oil pump required to meet the cooling requirements of the intermediate shaft. The target speed of the oil pump is determined based on the initial speed of the first oil pump and the initial speed of the second oil pump; The step of determining the target speed of the oil pump based on the initial speed of the first oil pump and the initial speed of the second oil pump includes: Obtain the real-time temperature of the friction plate; The real-time temperature of the friction plate is compared with the preset over-temperature threshold of the friction plate to obtain the comparison result; The initial speed of the first oil pump is corrected according to the comparison result to obtain the corrected initial speed of the first oil pump, and the target speed of the oil pump is determined according to the corrected initial speed of the first oil pump and the initial speed of the second oil pump. The step of correcting the initial speed of the first oil pump based on the comparison result to obtain the corrected initial speed of the first oil pump includes: When the comparison result indicates that the real-time temperature of the friction plate is greater than or equal to the over-temperature threshold of the friction plate, the upper limit value of the oil pump speed is obtained; The initial speed of the first oil pump is corrected using the upper limit value of the speed to obtain the corrected initial speed of the first oil pump; When the comparison result indicates that the real-time temperature of the friction plate is less than the over-temperature threshold of the friction plate, the correction coefficient corresponding to the real-time temperature of the friction plate is obtained; The initial speed of the first oil pump is corrected using the correction coefficient to obtain the corrected initial speed of the first oil pump.

2. The method according to claim 1, characterized in that, The lubrication inlet oil temperature is obtained through the following steps: Obtain the oil temperature and ambient temperature in the oil pan; The lubrication inlet oil temperature is determined by combining the oil temperature of the oil pan and the ambient temperature.

3. The method according to any one of claims 1 to 2, characterized in that, The method further includes: In the event of an oil pump failure, detect the type of failure the oil pump is experiencing; The fault type is sent to the transmission controller, so that the transmission controller determines the target action command based on the fault type and sends the target action command directly to the oil pump motor.

4. A cooling and lubrication control device, characterized in that, The device includes: The acquisition module is used to acquire the intermediate shaft speed, friction plate heating power, and lubrication inlet oil temperature corresponding to the target intermediate shaft brake. An initial module is used to determine the initial speed of a first oil pump based on the heat generation power of the friction plate and the lubrication inlet oil temperature, and to determine the initial speed of a second oil pump based on the speed of the intermediate shaft and the lubrication inlet oil temperature; the initial speed of the first oil pump is used to indicate the minimum oil pump speed required to meet the cooling requirements of the friction plate; the initial speed of the second oil pump is used to indicate the minimum initial speed of the oil pump required to meet the cooling requirements of the intermediate shaft. The target module is used to determine the target speed of the oil pump based on the initial speed of the first oil pump and the initial speed of the second oil pump; The step of determining the target speed of the oil pump based on the initial speed of the first oil pump and the initial speed of the second oil pump includes: Obtain the real-time temperature of the friction plate; The real-time temperature of the friction plate is compared with the preset over-temperature threshold of the friction plate to obtain the comparison result; The initial speed of the first oil pump is corrected according to the comparison result to obtain the corrected initial speed of the first oil pump, and the target speed of the oil pump is determined according to the corrected initial speed of the first oil pump and the initial speed of the second oil pump. The step of correcting the initial speed of the first oil pump based on the comparison result to obtain the corrected initial speed of the first oil pump includes: When the comparison result indicates that the real-time temperature of the friction plate is greater than or equal to the over-temperature threshold of the friction plate, the upper limit value of the oil pump speed is obtained; The initial speed of the first oil pump is corrected using the upper limit value of the speed to obtain the corrected initial speed of the first oil pump; When the comparison result indicates that the real-time temperature of the friction plate is less than the over-temperature threshold of the friction plate, the correction coefficient corresponding to the real-time temperature of the friction plate is obtained; The initial speed of the first oil pump is corrected using the correction coefficient to obtain the corrected initial speed of the first oil pump.

5. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 3.

6. An oil pump control system, characterized in that, include: An oil pump controller is configured to perform the steps of the method according to any one of claims 1 to 3, and generate control commands based on the target rotational speed of the oil pump; An oil pump motor, connected to the oil pump controller, is used to receive control commands from the oil pump controller and adjust the oil pump speed based on the control commands.

7. A vehicle, characterized in that, Includes the oil pump control system as described in claim 6.

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