A control method and device of a gearbox oil pump, an electronic device, and a storage medium

Abstract

The application discloses a control method and device of a gearbox oil pump, electronic equipment and a storage medium. The control method comprises the following steps: acquiring a vehicle state; the vehicle state comprises a vehicle start-stop state and a gearbox temperature; determining an oil pump control mode according to the vehicle state; selecting a corresponding oil pump control strategy according to the oil pump control mode; and controlling the oil pump according to the oil pump control strategy. According to the scheme in the application, the oil pump can be controlled according to the actual vehicle state, so that the energy consumption of the oil pump is reduced under the premise of meeting the demand of lubricating oil flow of each part of the gearbox, which is beneficial to the control of the oil pump and realizes accurate oil supply and efficient heat dissipation of the gearbox.

Description

Technical Field

[0001] Embodiments of the present invention relate to the field of automotive technology, and in particular to a control method, device, electronic device, and storage medium for a transmission oil pump. Background Art

[0002] With the rapid development of new energy vehicles, the performance parameters of electric drive systems are constantly improving, gradually moving towards high speed, high torque, and high power. These improvements in performance parameters will significantly increase the cooling and lubrication requirements of electric drive systems. Oil cooling systems regulate oil flow by controlling the speed of the oil pump. However, existing technologies have a single control method for oil pumps, which has limitations and cannot achieve precise oil supply and efficient heat dissipation to the transmission. Summary of the Invention

[0003] Based on the above problems, the embodiments of the present invention provide a control method, device, electronic device and storage medium for a transmission oil pump, which are conducive to the control of the oil pump and can achieve precise oil supply and efficient heat dissipation to the transmission part.

[0004] In a first aspect, an embodiment of the present invention provides a method for controlling a transmission oil pump, comprising:

[0005] Obtaining vehicle status; the vehicle status includes vehicle start / stop status and transmission temperature;

[0006] determining an oil pump control mode according to the vehicle state;

[0007] Selecting a corresponding oil pump control strategy according to the oil pump control mode;

[0008] The oil pump is controlled according to the oil pump control strategy.

[0009] In a second aspect, an embodiment of the present invention further provides a control device for a transmission oil pump, comprising:

[0010] Vehicle status acquisition, used to obtain vehicle status; the vehicle status includes vehicle start / stop status and transmission temperature;

[0011] an oil pump control mode determining module, configured to determine an oil pump control mode according to the vehicle state;

[0012] An oil pump control strategy selection module, configured to select a corresponding oil pump control strategy according to the oil pump control mode;

[0013] The oil pump control module is used to control the oil pump according to the oil pump control strategy.

[0014] In a third aspect, an embodiment of the present invention further provides a terminal device, including:

[0015] one or more processors;

[0016] a storage device for storing one or more programs;

[0017] The one or more programs are executed by the one or more processors, so that the one or more processors implement the transmission oil pump control method provided by the embodiment of the present invention.

[0018] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the transmission oil pump control method provided by an embodiment of the present invention.

[0019] The transmission oil pump control method provided by an embodiment of the present invention first obtains the vehicle status, including the vehicle start / stop status and transmission temperature; secondly, determines the oil pump control mode based on the vehicle status; then, selects the corresponding oil pump control strategy based on the oil pump control mode; and finally, controls the oil pump according to the oil pump control strategy. Using this method, the oil pump can be controlled based on the actual vehicle status, meeting the lubricating oil flow requirements of various transmission components while reducing the oil pump's energy consumption. This facilitates oil pump control, achieving precise oil supply to the transmission and efficient heat dissipation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic flow chart of a method for controlling a transmission oil pump provided in the first embodiment of the present invention;

[0021] Figure 2 A schematic flow chart of a method for controlling a transmission oil pump provided in a second embodiment of the present invention;

[0022] Figure 3 A schematic flow chart of a method for controlling a transmission oil pump provided in a third embodiment of the present invention;

[0023] Figure 4 A schematic flow chart of a method for controlling a transmission oil pump provided in a fourth embodiment of the present invention;

[0024] Figure 5 This is a structural schematic diagram of a transmission oil pump control device provided in Example 5 of the present invention. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0026] Before any embodiments of the application are explained in detail, it is to be understood that the application is not limited in its application to any specific method(s), combination of components, or embodiment(s), nor is the application to be limited in its implementation to any particular system(s), or any other specific examples that can be described below. Embodiments of the application should not be construed as limited to only those described herein. The examples are presented herein for illustrative purposes only and are not intended to limit the scope of the application. The present application is directed to any one of the related devices, apparatuses, methods, and / or articles of manufacture that are described herein.

[0027] The term "include," and derivations thereof, is used inclusively, i.e., "includes, but is not limited to." The term "based on" means "based, at least in part, on."

[0028] It should be noted that the terms "first", "second", and the like, as used herein, are used as identifiers to distinguish between different elements, and are not intended to limit the order or sequence in which the elements are described.

[0029] It should be noted that the terms "one", "multiple", and the like, as used herein, are illustrative and not limiting, and those skilled in the art will understand that "one" or "a" should be interpreted as "one or more" unless the context clearly indicates otherwise.

[0030] Embodiment One

[0031] Figure 1 A flowchart of a control method of a gearbox oil pump is provided for Embodiment One of the application. The method can be used to control the gearbox oil pump of a vehicle electric drive system. The method can be executed by a control device of the gearbox oil pump, which can be implemented by software and / or hardware and is generally integrated on an electronic device, such as a controller, in this embodiment.

[0032] As shown in FIG. 1, the control method of the gearbox oil pump provided by Embodiment One of the application includes the following steps: Figure 1

[0033] S110, obtaining a vehicle state.

[0034] The vehicle state includes, but is not limited to, a vehicle start-stop state and a gearbox temperature. The vehicle start-stop state can be understood as the running state of the vehicle, i.e., the vehicle is in a state of starting, stopping, or driving, etc. The vehicle start-stop state can be detected by a vehicle controller and sent to the control device of the gearbox oil pump. The gearbox temperature refers to the internal temperature of the gearbox, which can also be understood as the oil pump environment temperature. The gearbox temperature can be detected by a temperature sensor in the gearbox and sent to the control device of the gearbox oil pump. ​

[0035] S120: Determine an oil pump control mode according to the vehicle state.

[0036] In the embodiment of the present invention, different vehicle states correspond to different oil pump control modes. After confirming the current vehicle state, the oil pump control mode required by the current vehicle state can be determined according to the current vehicle state.

[0037] For example, before a vehicle leaves the factory, bench testing can be used to determine lubricating oil flow requirements to meet different vehicle start-stop conditions and / or transmission temperatures. Different lubricating oil flow requirements correspond to different oil pump control modes, thereby establishing a correspondence between different vehicle conditions and oil pump control modes. In actual vehicle use, the oil pump control mode corresponding to the current vehicle condition can be determined based on this correspondence.

[0038] S130 : Select a corresponding oil pump control strategy according to the oil pump control mode.

[0039] Furthermore, each oil pump control mode corresponds to a different oil pump control strategy, and there can be a one-to-one correspondence between oil pump control modes and oil pump control strategies. After the oil pump control mode is determined, the oil pump control strategy corresponding to that oil pump control mode can be directly selected. The oil pump control strategy for each oil pump control mode can also be derived through bench testing.

[0040] S140: Control the oil pump according to the oil pump control strategy.

[0041] By executing the selected oil pump control strategy, the lubricating oil flow provided by the oil pump can meet the lubricating oil flow demand under the current vehicle state.

[0042] The embodiments of the present invention do not limit the specific design of the above-mentioned oil pump control mode and the corresponding oil pump control strategy, and those skilled in the art may design them according to actual tests.

[0043] A first embodiment of the present invention provides a transmission oil pump control method. The method first obtains the vehicle status, including the vehicle start / stop status and transmission temperature; second, determines the oil pump control mode based on the vehicle status; then, selects the corresponding oil pump control strategy based on the oil pump control mode; and finally, controls the oil pump according to the oil pump control strategy. This method allows the oil pump to be controlled based on the actual vehicle status, meeting the lubricating oil flow requirements of various transmission components while reducing the oil pump's energy consumption. This facilitates control of the oil pump, achieving precise oil supply to the transmission, and efficient heat dissipation.

[0044] Example 2

[0045] Figure 2A flowchart of a control method of a gearbox oil pump provided by the second embodiment of the present application is shown in the figure, and the second embodiment is optimized on the basis of the above-mentioned embodiments. In the second embodiment, (S120) is further specified as: S220, determining a first oil pump control mode when the vehicle is in a starting but not driving state; (S130) is further specified as: S230, selecting a first oil pump control strategy according to the first oil pump control mode; in the first oil pump control strategy, the oil pump is intermittently operated; (S140) is further specified as: S240, intermittently controlling the oil pump according to the first oil pump control strategy. The details of the second embodiment not mentioned above can be referred to the first embodiment.

[0046] As shown in the figure, the control method of the gearbox oil pump provided by the second embodiment of the present application comprises the following steps: Figure 2

[0047] S210, obtaining a vehicle state.

[0048] The vehicle state comprises a vehicle start-stop state and a gearbox temperature.

[0049] S220, determining a first oil pump control mode when the vehicle is in a starting but not driving state.

[0050] In the second embodiment of the present application, whether the vehicle is in a starting but not driving state can be determined according to the vehicle start-stop state. The starting but not driving state means that the vehicle is in an ignition starting state, but the driver does not step on the accelerator and the vehicle does not drive.

[0051] When it is determined that the vehicle is in a starting but not driving state, the oil pump control mode required by the state is determined as the first oil pump control mode.

[0052] S230, selecting a first oil pump control strategy according to the first oil pump control mode.

[0053] Further, the first oil pump control mode is correspondingly provided with the first oil pump control strategy, and in the first oil pump control strategy, the oil pump is intermittently operated. In other words, in the first oil pump control strategy, the oil pump is intermittently started to achieve intermittent lubrication.

[0054] When the vehicle is in a starting but not driving state, a large lubricating oil flow is not required. In this state, the oil pump is intermittently controlled to ensure the establishment of the oil film of the gearbox gear, that is, to ensure the lubrication of the gear, and to make the oil pump have low energy consumption.

[0055] S240, intermittently controlling the oil pump according to the first oil pump control strategy.

[0056] The oil pump can be intermittently started according to the first oil pump control strategy to achieve intermittent lubrication of the gearbox gear. ​

[0057] The transmission oil pump control method proposed in the second embodiment of the present invention adopts a first oil pump control strategy to control the intermittent operation of the oil pump when the vehicle is in the starting but not driving state, which can ensure the lubrication of the transmission gears and reduce the energy consumption of the oil pump.

[0058] On the basis of the above embodiment, the present invention further proposes a modified embodiment of the above embodiment. It should be noted that, in order to simplify the description, only the differences from the above embodiment are described in the modified embodiment.

[0059] Exemplarily, in one embodiment, the above (S240) can be concretized as: controlling the intermittent start of the oil pump with a first duration as the time interval and a second duration as the operation maintenance duration; wherein the first duration and the second duration are determined based on bench tests.

[0060] In the first oil pump control strategy, a timer can be set up and the timing can be reset intermittently. The first duration is the interval between two oil pump operations, and the second duration is the single operation duration of the oil pump. The oil pump speed is controlled to be periodically set to control the intermittent start of the oil pump, thereby achieving intermittent lubrication when the vehicle is started but not driving.

[0061] Among them, the specific values ​​of the first time length and the second time length are not limited. Those skilled in the art can set them according to actual needs. Through bench tests, it is found that the first time length can be 2-4 minutes and the second time length can be 4-6 minutes. Intermittent lubrication is carried out in this way to ensure that the oil film is well established.

[0062] Example 3

[0063] Figure 3 This is a flow chart of a transmission oil pump control method provided in the third embodiment of the present invention. This third embodiment is optimized based on the above embodiments. In this embodiment, (S120) is further specified as follows: S320, when the vehicle is in motion, determining a second oil pump control mode; (S130) is further specified as follows: S330, selecting a second oil pump control strategy based on the second oil pump control mode; in the second oil pump control strategy, the oil pump operates continuously, and the oil pump speed is related to the transmission temperature; (S140) is further specified as follows: S340, adjusting the oil pump speed according to the second oil pump control strategy. For details not yet fully detailed in this embodiment, please refer to the above embodiments.

[0064] like Figure 3 As shown, a method for controlling a transmission oil pump provided by a third embodiment of the present invention includes the following steps:

[0065] S310: Obtain vehicle status.

[0066] The vehicle status includes the vehicle start / stop status and the transmission temperature.

[0067] S320: When the vehicle is in a driving state, determine a second oil pump control mode.

[0068] In the third embodiment of the present invention, whether the vehicle is in a driving state can be determined based on the vehicle start / stop state. When it is determined that the vehicle is in a driving state, the oil pump control mode required by this state is determined to be the second oil pump control mode.

[0069] S330: Select a second oil pump control strategy according to the second oil pump control mode.

[0070] Furthermore, the second oil pump control mode corresponds to a second oil pump control strategy. In this strategy, the oil pump runs continuously, and its speed is related to the transmission temperature. Specifically, in this strategy, the oil pump runs continuously, and its speed is related to the actual transmission temperature.

[0071] The inventors have discovered that during vehicle operation, the transmission requires different oil pump speeds within different temperature ranges. In this embodiment, a grading table of corresponding oil pump speeds for different transmission temperature ranges under driving conditions can be determined before the vehicle leaves the factory based on bench testing and other factors. This grading table can include optimal oil pump speeds for different transmission temperature ranges.

[0072] For example, generally speaking, when the transmission temperature is higher, the required oil pump speed is higher to ensure lubrication and cooling. Of course, the corresponding relationship between oil pump speed and transmission temperature may also be related to various factors, and this is only an example.

[0073] During actual driving of the vehicle, after entering the second oil pump control mode, the oil pump speed is automatically adjusted based on the corresponding classification table of different transmission temperature ranges and oil pump speeds, with the actual transmission temperature as input and the oil pump speed as output.

[0074] S340: Adjust the speed of the oil pump according to the second oil pump control strategy.

[0075] The transmission oil pump control method provided in the third embodiment of the present invention adopts a second oil pump control strategy to control the continuous operation of the oil pump when the vehicle is in motion, and can adjust the oil pump speed according to the transmission temperature output, thereby ensuring the lubrication and cooling effect of the transmission when the vehicle is in motion.

[0076] On the basis of the above embodiment, the present invention further proposes a modified embodiment of the above embodiment. It should be noted that, in order to simplify the description, only the differences from the above embodiment are described in the modified embodiment.

[0077] For example, in some embodiments, the vehicle state also includes the transmission output shaft speed and torque. In the second oil pump control strategy, the oil pump speed is also related to the transmission output shaft speed and torque; the above (S330) can be concretized as follows: in the second oil pump control mode, the lubricating oil flow of the oil pump is determined in combination with the transmission output shaft speed and torque; the second oil pump control strategy is determined according to the transmission temperature and the lubricating oil flow of the oil pump.

[0078] As those skilled in the art will appreciate, during vehicle operation, the required lubricating oil flow rate within the transmission (i.e., the lubricating oil flow rate of the oil pump) is related to the transmission output shaft gear speed and the gear load torque. The oil pump speed, or the speed of the oil pump motor, is related to the lubricating oil flow rate delivered by the pump. Generally, a higher oil pump speed results in a higher lubricating oil flow rate.

[0079] In this embodiment, bench testing can be performed to assess the oil pump's lubrication capacity and lubrication performance under varying transmission loads, yielding a table of operating conditions that correlates transmission output shaft speed and torque with lubricant flow rate. Subsequently, lubricant flow rate and transmission temperature classifications are performed to yield a table of oil pump speeds corresponding to various transmission temperature ranges. Table 1 illustrates a classification table provided by an embodiment of the present invention. With reference to Table 1, this classification table may include optimal oil pump speeds for various transmission temperature ranges and lubricant flow rates.

[0080] Table 1

[0081]

[0082] Table 1 exemplarily shows three transformer temperature ranges and three sets of required lubricating oil flow rates corresponding to the oil pump speeds, but is not limited thereto.

[0083] During actual driving of the vehicle, after entering the second oil pump control mode, according to the classification table, the actual transmission temperature, transmission output shaft speed and torque are used as inputs, and the oil pump speed is used as output to achieve automatic adjustment of the oil pump speed.

[0084] In this embodiment, the oil pump speed is regulated in combination with various working conditions of the gearbox to ensure that the oil pump operating speed matches the current actual working conditions.

[0085] For example, in other embodiments, after the above (S330), it also includes: when the transmission temperature is lower than the low temperature threshold, obtaining the actual speed of the oil pump, and determining the target speed of the oil pump corresponding to the current transmission temperature in the second oil pump control strategy; when the difference between the target speed and the actual speed is within a preset difference range, continuing to execute the second oil pump control strategy, and when the difference between the target speed and the actual speed exceeds the preset difference range, stopping executing the second oil pump control strategy.

[0086] The inventors have discovered that in low-temperature environments, the higher viscosity of lubricating oil can cause the actual oil pump speed to fall short of the target speed. The actual speed is the actual speed of the oil pump motor, while the target speed is the target speed required by the oil pump, as determined by the second oil pump control strategy (e.g., Table 1). A significant difference between the target speed and the actual speed can lead to insufficient lubrication capacity of the oil pump, impacting normal vehicle operation.

[0087] Based on this, this embodiment proposes that after obtaining the transmission temperature, the transmission temperature can be compared with a preset low-temperature threshold. If it is determined that the transmission temperature is lower than the low-temperature threshold, it indicates that there may be a problem of insufficient lubrication capacity due to increased viscosity of the lubricating oil. At this time, the oil pump speed can be checked to determine whether the difference between the target speed and the actual speed of the oil pump exceeds the preset difference range. If the difference between the target speed and the actual speed does not exceed the preset difference range, it means that the current oil pump speed meets the required target speed, and the oil pump can be controlled normally according to the second oil pump control strategy. If the difference between the target speed and the actual speed exceeds the preset difference range, it means that the current oil pump speed no longer meets the required target speed, and it can no longer be controlled according to the second oil pump control strategy, and the torque limit flag is output to limit the torque and speed of the drive axle where the oil pump is located to protect the normal operation of the vehicle.

[0088] The specific values ​​of the above-mentioned low temperature threshold and the preset difference range are not limited, and those skilled in the art can set them according to actual conditions.

[0089] Example 4

[0090] Figure 4 This is a flow chart of a transmission oil pump control method provided in Embodiment 4 of the present invention. This embodiment is an optimization of the above embodiments. In this embodiment, the transmission oil pump control method further includes the following steps: S450, obtaining the oil pump operating status; S460, determining whether the oil pump is faulty based on the oil pump operating status; S470, selecting a corresponding oil pump fault post-processing strategy based on the fault type, including communication faults and operational faults; S480, executing the oil pump fault post-processing strategy. For details not fully detailed in this embodiment, please refer to the above embodiments.

[0091] like Figure 4 As shown, a method for controlling a transmission oil pump provided by a fourth embodiment of the present invention includes the following steps:

[0092] S410: Obtain vehicle status.

[0093] Vehicle status includes vehicle start / stop status and transmission temperature;

[0094] S420: Determine the oil pump control mode according to the vehicle state.

[0095] S430: Select a corresponding oil pump control strategy according to the oil pump control mode.

[0096] S440: Control the oil pump according to the oil pump control strategy.

[0097] The specific implementation of the above S410-S440 can refer to any of the above embodiments and will not be repeated here.

[0098] S450: Obtain the working status of the oil pump.

[0099] The fuel pump operating status includes, but is not limited to, the communication status between the fuel pump and the vehicle, as well as the actual operating status of the fuel pump. The actual operating status includes, but is not limited to, actual operating parameter data such as fuel pump voltage, fuel pump current, and fuel pump load.

[0100] S460: Determine whether the oil pump is faulty based on the working status of the oil pump.

[0101] In this embodiment, whether the oil pump is faulty can be determined based on the oil pump's operating status. For example, if the oil pump cannot communicate with the vehicle, it is determined that the oil pump has a communication fault; if the actual operating parameter data of the oil pump is abnormal, it is determined that the oil pump has an operating fault.

[0102] S470: When an oil pump failure occurs, select a corresponding oil pump failure post-processing strategy according to the failure type.

[0103] Fault types include, but are not limited to, communication faults and operational faults. Communication faults may include oil pump communication faults and oil pump address bit floating faults. Operational faults include, but are not limited to, overvoltage faults, undervoltage faults, overcurrent faults, overload faults, and stuck faults.

[0104] S480: Execute the oil pump failure post-processing strategy.

[0105] In the fault state, the corresponding oil pump fault post-processing strategy can be selected and executed according to different fault types to ensure the lubrication condition of the vehicle gearbox and the driving safety of the vehicle as much as possible.

[0106] For example, for a dual-fuel-pump vehicle, if a single fuel-pump node is lost, a single-fuel-pump communication failure is determined. The post-failure handling strategy is: the other fuel pump operates independently, and the drive axle with the failed fuel pump implements level 1 speed and torque limiting. If a dual-fuel-pump node is lost, a dual-fuel-pump communication failure is determined. The post-failure handling strategy is: the drive axle with the failed fuel pump implements level 2 speed and torque limiting, which is then reduced to zero after a certain period of time. If the fuel pump address bit is left unconnected, a floating address bit fault is determined. The post-failure handling strategy is: the drive axle with the failed fuel pump implements level 1 speed and torque limiting.

[0107] For example, if an abnormality in the oil pump power supply circuit voltage / current is detected, an overvoltage / undervoltage / overcurrent fault is determined based on the type of abnormality. The post-fault handling strategy for the oil pump is as follows: If the fault can be self-corrected within a preset time period, no action is required. If the fault cannot be self-corrected within the preset time period, the faulty oil pump is stopped, and first or second level speed and torque limiting is implemented based on the number of oil pump stalls. If the oil pump does not respond to the target speed for more than a certain period of time, a stuck fault is determined. The post-fault handling strategy for the oil pump is as follows: Based on the duration of the stuck fault, the following control strategy is implemented. If the oil pump temporarily sticks multiple times within a certain period of time, no action is required. If the oil pump sticks continuously, first or second level speed and torque limiting is implemented based on the number of oil pump sticking episodes. If the difference between the target speed and the actual speed of the oil pump exceeds the calibrated speed difference, the oil pump is determined to be overloaded. The post-fault handling strategy for the oil pump is to control the oil pump to operate at reduced power.

[0108] Of course, in actual application, the oil pump failure type and the corresponding oil pump failure post-processing strategy are not limited to this, and those skilled in the art can design them according to actual needs.

[0109] Example 5

[0110] Figure 5 This is a structural schematic diagram of a transmission oil pump control device provided in Example 5 of the present invention. The device can be used to control the transmission oil pump of a vehicle electric drive system, wherein the device can be implemented by software and / or hardware and is generally integrated into an electronic device.

[0111] like Figure 5 As shown, the control device of the transmission oil pump includes:

[0112] The vehicle status acquisition 100 is used to acquire the vehicle status; the vehicle status includes the vehicle start / stop status and the transmission temperature.

[0113] The oil pump control mode determination module 200 is configured to determine the oil pump control mode according to the vehicle state.

[0114] The oil pump control strategy selection module 300 is used to select a corresponding oil pump control strategy according to the oil pump control mode.

[0115] The oil pump control module 400 is used to control the oil pump according to the oil pump control strategy.

[0116] The control device for the transmission oil pump provided in an embodiment of the present invention can control the oil pump according to the actual vehicle state, which can not only meet the lubricating oil flow requirements of various components of the transmission, but also reduce the energy consumption of the oil pump, which is beneficial to the control of the oil pump and realizes precise oil supply and efficient heat dissipation to the transmission part.

[0117] Optionally, in a possible embodiment, the oil pump control mode determination module can be specifically used to: determine the first oil pump control mode when the vehicle is in a started but not driving state; the oil pump control strategy selection module can be specifically used to: select the first oil pump control strategy according to the first oil pump control mode; in the first oil pump control strategy, the oil pump operates intermittently; the oil pump control module can be specifically used to: intermittently control the oil pump operation according to the first oil pump control strategy.

[0118] Optionally, in a possible embodiment, the oil pump control module can also be used to control the intermittent start-up of the oil pump with a first duration as the time interval and a second duration as the operation maintenance duration; wherein the first duration and the second duration are determined based on bench tests.

[0119] Optionally, in a possible embodiment, the oil pump control mode determination module can also be used to: determine the second oil pump control mode when the vehicle is in a driving state; the oil pump control strategy selection module can also be used to: select the second oil pump control strategy according to the second oil pump control mode; in the second oil pump control strategy, the oil pump runs continuously, and the speed of the oil pump is related to the transmission temperature; the oil pump control module can also be used to: adjust the speed of the oil pump according to the second oil pump control strategy.

[0120] Optionally, in a possible embodiment, the vehicle state also includes the transmission output shaft speed and torque. In the second oil pump control strategy, the oil pump speed is also related to the transmission output shaft speed and torque. The oil pump control strategy selection module includes a lubricating oil flow determination unit and a control strategy determination unit. The lubricating oil flow determination unit is configured to determine the lubricating oil flow of the oil pump in the second oil pump control mode based on the transmission output shaft speed and torque. The control strategy determination unit is configured to determine the second oil pump control strategy based on the transmission temperature and the lubricating oil flow of the oil pump.

[0121] Optionally, in a possible embodiment, the transmission oil pump control device may further include a speed verification module configured to obtain the actual oil pump speed when the transmission temperature is below a low-temperature threshold, and determine a target oil pump speed corresponding to the current transmission temperature in the second oil pump control strategy. The oil pump control module may also be configured to continue executing the second oil pump control strategy when the difference between the target speed and the actual speed is within a preset difference range, and to cease executing the second oil pump control strategy when the difference between the target speed and the actual speed exceeds the preset difference range.

[0122] Optionally, in a possible embodiment, the transmission oil pump control device may further include a fault determination module and a fault post-processing module. The fault determination module is configured to obtain the operating status of the oil pump and determine whether the oil pump has failed based on the operating status. The fault post-processing module is configured to select and execute a corresponding oil pump fault post-processing strategy based on the fault type when an oil pump fault occurs. Fault types include communication faults and operational faults.

[0123] The above-mentioned transmission oil pump control device can execute the transmission oil pump control method provided by any embodiment of the present invention, and has all the corresponding technical features and corresponding beneficial effects of the execution method.

[0124] Example 6

[0125] Embodiment 6 of the present invention provides an electronic device, comprising: one or more processors; a storage device for storing one or more programs; when the one or more programs are executed by one or more processors, the one or more processors implement the control method of the transmission oil pump provided in any embodiment of the present invention.

[0126] The storage device in the electronic device serves as a computer-readable storage medium and can be used to store one or more programs. The programs can be software programs, computer-executable programs, and modules, such as the program instructions / modules corresponding to the transmission oil pump control method provided in any embodiment of the present invention. The processor executes the software programs, instructions, and modules stored in the storage device to execute various functional applications and data processing of the electronic device, thereby implementing the transmission oil pump control method in the above-mentioned method embodiment.

[0127] The storage device may include a program storage area and a data storage area, wherein the program storage area may store an operating system and at least one application required for a function; the data storage area may store data created based on the use of the device, etc. Furthermore, the storage device may include high-speed random access memory and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state memory device. In some instances, the storage device may further include memory remotely located relative to the processor, and such remote memory may be connected to the device via a network. Examples of the aforementioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0128] Example 7

[0129] A seventh embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon. When the program is executed by a processor, the program is used to execute the transmission oil pump control method provided by any embodiment of the present invention.

[0130] The computer storage medium of the embodiment of the present invention may adopt any combination of one or more computer-readable media. The computer-readable medium may be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or component, or any combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a flash memory, an optical fiber, a portable CD-ROM, an optical storage device, a magnetic storage device, or any suitable combination thereof. The computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, device or device.

[0131] A computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such a propagated data signal may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium that can transmit, propagate, or transport a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0132] The program code contained on the computer-readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wire, optical cable, radio frequency (RF), etc., or any suitable combination of the foregoing.

[0133] Computer program code for performing the operations of the present invention may be written in one or more programming languages, or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., through the Internet using an Internet service provider).

[0134] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A method for controlling a transmission oil pump, characterized in that: include: Obtaining vehicle status; the vehicle status includes vehicle start / stop status and transmission temperature; determining an oil pump control mode according to the vehicle state; Selecting a corresponding oil pump control strategy according to the oil pump control mode; controlling the oil pump according to the oil pump control strategy; The determining of the oil pump control mode according to the vehicle state includes: When the vehicle is in a started but not running state, determining a first oil pump control mode; Selecting a corresponding oil pump control strategy according to the oil pump control mode includes: Selecting a first oil pump control strategy according to the first oil pump control mode; in the first oil pump control strategy, the oil pump operates intermittently; Controlling the oil pump according to the oil pump control strategy includes: intermittently controlling the operation of the oil pump according to the first oil pump control strategy; The determining of the oil pump control mode according to the vehicle state includes: When the vehicle is in a driving state, determining a second oil pump control mode; Selecting a corresponding oil pump control strategy according to the oil pump control mode includes: selecting a second oil pump control strategy according to the second oil pump control mode; in the second oil pump control strategy, the oil pump continuously operates, and a speed of the oil pump is related to a temperature of the transmission; Controlling the oil pump according to the oil pump control strategy includes: The speed of the oil pump is adjusted according to the second oil pump control strategy.

2. The control method of the transmission oil pump according to claim 1, characterized in that: Intermittently controlling the oil pump operation according to the first oil pump control strategy includes: The oil pump is controlled to start intermittently with a first duration as the time interval and a second duration as the operation maintenance duration; wherein the first duration and the second duration are determined based on bench tests.

3. The control method of the transmission oil pump according to claim 1, characterized in that: The vehicle state further includes a transmission output shaft speed and torque, and in the second oil pump control strategy, the oil pump speed is also related to the transmission output shaft speed and torque; Selecting a second oil pump control strategy according to the second oil pump control mode includes: In the second oil pump control mode, the lubricating oil flow rate of the oil pump is determined in combination with the speed and torque of the output shaft of the transmission; The second oil pump control strategy is determined according to the transmission temperature and the lubricating oil flow of the oil pump.

4. The control method of the transmission oil pump according to claim 1, characterized in that: After selecting the second oil pump control strategy according to the second oil pump control mode, the method further includes: When the transmission temperature is lower than a low temperature threshold, obtaining an actual speed of the oil pump, and determining a target speed of the oil pump corresponding to the current transmission temperature in the second oil pump control strategy; When the difference between the target speed and the actual speed is within a preset difference range, the second oil pump control strategy continues to be executed; when the difference between the target speed and the actual speed exceeds the preset difference range, the second oil pump control strategy is stopped.

5. The method for controlling a transmission oil pump according to claim 1, wherein: The control method of the transmission oil pump further includes: Get the working status of the oil pump; determining whether the oil pump is faulty according to the working state of the oil pump; When the oil pump fails, a corresponding oil pump failure post-processing strategy is selected according to the failure type; the failure type includes communication failure and operation failure; Execute the oil pump failure post-processing strategy.

6. A control device for a transmission oil pump, characterized in that: include: Vehicle status acquisition, used to obtain vehicle status; the vehicle status includes vehicle start / stop status and transmission temperature; an oil pump control mode determining module, configured to determine an oil pump control mode according to the vehicle state; An oil pump control strategy selection module, configured to select a corresponding oil pump control strategy according to the oil pump control mode; An oil pump control module, configured to control the oil pump according to the oil pump control strategy; The oil pump control mode determination module is specifically used to: When the vehicle is in a started but not running state, determining a first oil pump control mode; The oil pump control strategy selection module is specifically configured to: select a first oil pump control strategy according to the first oil pump control mode; in the first oil pump control strategy, the oil pump operates intermittently; the oil pump control module is specifically configured to: intermittently control the operation of the oil pump according to the first oil pump control strategy; The oil pump control mode determination module is further configured to: When the vehicle is in a driving state, determining a second oil pump control mode; The oil pump control strategy selection module is further used to: select a second oil pump control strategy according to the second oil pump control mode; in the second oil pump control strategy, the oil pump runs continuously, and the speed of the oil pump is related to the transmission temperature; the oil pump control module is further used to: adjust the speed of the oil pump according to the second oil pump control strategy.

7. An electronic device, characterized in that: include: one or more processors; a storage device for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the transmission oil pump control method according to any one of claims 1 to 5.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the control method for the transmission oil pump as claimed in any one of claims 1 to 5 is implemented.

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