Vehicle oil pump control method and device

Abstract

The invention provides a vehicle oil pump control method and device.The method comprises the steps that when a vehicle enters a low-voltage state, an oil pump is awakened through a CAN bus; when the voltage of the storage battery of the vehicle is larger than the preset minimum allowable voltage, an oil pump is controlled to conduct pre-lubrication; when the vehicle enters a high-pressure state, the oil pump is controlled to continuously rotate; when the vehicle enters the running state and the vehicle is detected to be engaged in the preset gear, a vehicle motor is controlled to start running, and an oil pump is controlled to conduct continuous lubricating operation; and when the vehicle enters the parking power-off state and it is detected that the vehicle is in the N gear, the oil pump is controlled to conduct delayed closing operation. According to the method and device, the oil pump can be awakened in advance and pre-lubricated, meanwhile, the oil pump is kept lubricated for a period of time after parking, sufficient lubrication of the motor and the speed reducer at the low temperature is achieved, safety of the motor and the speed reducer is guaranteed, the NVH problems such as abnormal sound caused by insufficient lubrication are avoided, and the performance and the service life of an electric drive system can be prolonged.

Description

Technical Field

[0001] The present application relates to the field of vehicle control technology, and in particular to a vehicle oil pump control method and device. Background Art

[0002] With the vigorous development of the pure electric vehicle industry, the performance and efficiency requirements of automotive electric drive system components are increasing. With its motor-driven characteristics, the electric oil pump can flexibly adjust the pressure and flow of the oil pump output according to the actual needs of the cooling and lubrication systems to ensure that each component obtains sufficient lubrication and cooling effects. The motor controller can accurately control the output of the oil pump to meet the specific needs of the motor and reducer for cooling and lubrication. In the prior art, a hard-wired wake-up method is often used to wake up the electric oil pump, that is, lubrication is started only after the ignition switch is placed in the ON position and high voltage electricity is connected. However, in a low temperature environment, due to the reduced fluidity of the lubricating oil, if the vehicle is about to start driving at this time, there may be NVH problems such as abnormal noise caused by insufficient lubrication, which in turn affects the performance and service life of the electric drive system. Summary of the invention

[0003] The purpose of this application is to provide a vehicle oil pump control method and device, which can wake up and pre-lubricate the oil pump in advance, and at the same time, keep the oil pump lubricated for a period of time after parking, so as to achieve sufficient lubrication of the motor and reducer at low temperatures, ensure the safety of the motor and reducer, avoid NVH problems such as abnormal noise caused by insufficient lubrication, and help to extend the performance and service life of the electric drive system.

[0004] The first aspect of the present application provides a vehicle oil pump control method, comprising:

[0005] When the vehicle enters a low-pressure state, the oil pump is awakened via the CAN bus;

[0006] When the battery voltage of the vehicle is greater than a preset minimum allowable voltage, controlling the oil pump to perform pre-lubrication;

[0007] When the vehicle enters a high-pressure state, the oil pump is controlled to rotate continuously;

[0008] When the vehicle enters the driving state and when it is detected that the vehicle is in a preset gear, the vehicle motor is controlled to start running, and the oil pump is controlled to perform continuous lubrication operation;

[0009] When the vehicle enters a parking and power-off state, and when it is detected that the vehicle is in N gear, the oil pump is controlled to perform a delayed shutdown operation.

[0010] In the above implementation process, the method can wake up and pre-lubricate the oil pump in advance. At the same time, keep the oil pump lubricated for a period of time after parking, so as to achieve sufficient lubrication of the motor and reducer at low temperature, ensure the safety of the motor and reducer, avoid NVH problems such as abnormal noise caused by insufficient lubrication, and help to extend the performance and service life of the electric drive system.

[0011] Further, controlling the oil pump to perform pre-lubrication includes:

[0012] Get the current stator temperature of the first motor;

[0013] determining the oil pump lubrication time according to the stator temperature of the first motor;

[0014] The oil pump is controlled to perform pre-lubrication according to the lubrication time of the oil pump.

[0015] Further, after controlling the oil pump to perform pre-lubrication according to the oil pump lubrication time, the method further includes:

[0016] Controlling the oil pump to enter a pre-lubrication waiting state;

[0017] When the vehicle is still in a low-pressure state, after a preset period of time, the step of controlling the oil pump to perform pre-lubrication according to the oil pump lubrication time is performed.

[0018] Furthermore, the controlling the oil pump to perform continuous rotation operation includes:

[0019] Get the current stator temperature of the second motor;

[0020] determining a first oil pump speed according to a stator temperature of the second motor;

[0021] The oil pump is controlled to maintain the first oil pump speed for continuous rotation.

[0022] Further, controlling the oil pump to perform continuous lubrication operation includes:

[0023] Obtaining motor speed, motor torque and stator temperature of the third motor;

[0024] determining a second oil pump speed according to the motor speed and the motor torque;

[0025] Compensating the second oil pump speed according to the motor stator temperature to obtain a third oil pump speed;

[0026] Lubrication of the oil pump is controlled according to the third oil pump speed.

[0027] Further, the controlling the oil pump to perform a delayed closing operation includes:

[0028] Controlling the oil pump to operate according to a preset low speed;

[0029] When the vehicle enters the lower high-voltage state, obtaining the current stator temperature of the fourth motor;

[0030] determining a release delay time according to the stator temperature of the fourth motor;

[0031] The oil pump is controlled to stop running after the release delay time.

[0032] A second aspect of the present application provides a vehicle oil pump control device, the vehicle oil pump control device comprising:

[0033] A wake-up unit is used to wake up the oil pump via the CAN bus when the vehicle enters a low-pressure state;

[0034] a first control unit, configured to control the oil pump to perform pre-lubrication when the battery voltage of the vehicle is greater than a preset minimum allowable voltage;

[0035] A second control unit is used to control the oil pump to continuously rotate when the vehicle enters a high-pressure state;

[0036] A third control unit is used to control the vehicle motor to start running and control the oil pump to perform continuous lubrication operation when the vehicle enters a driving state and detects that the vehicle is in a preset gear;

[0037] The fourth control unit is used to control the oil pump to perform a delayed shutdown operation when the vehicle enters a parking and power-off state and when it is detected that the vehicle is in N gear.

[0038] Furthermore, the first control unit includes:

[0039] A first acquisition subunit, used for acquiring a current stator temperature of the first motor when the battery voltage of the vehicle is greater than a preset minimum allowable voltage;

[0040] a first determining subunit, configured to determine an oil pump lubrication time according to a stator temperature of the first motor;

[0041] The first control subunit is used to control the oil pump to perform pre-lubrication according to the lubrication time of the oil pump.

[0042] Furthermore, the first control subunit is also used to control the oil pump to enter a pre-lubrication waiting state;

[0043] The first control subunit is further configured to, when the vehicle is still in a low-pressure state, control the oil pump to perform pre-lubrication according to the oil pump lubrication time after a preset time period.

[0044] Furthermore, the second control unit comprises:

[0045] A second acquisition subunit, used for acquiring the current stator temperature of the second motor when the vehicle enters a high-voltage state;

[0046] a second determination subunit, configured to determine a first oil pump speed according to a stator temperature of the second motor;

[0047] The second control subunit is used to control the oil pump to maintain the first oil pump speed for continuous rotation.

[0048] Furthermore, the third control unit includes:

[0049] A third acquisition subunit, used to acquire the motor speed, the motor torque and the stator temperature of the third motor;

[0050] a third determination subunit, configured to determine a second oil pump speed according to the motor speed and the motor torque;

[0051] a compensation subunit, configured to compensate the second oil pump speed according to the motor stator temperature to obtain a third oil pump speed;

[0052] The third control subunit is used to control the lubrication of the oil pump according to the rotation speed of the third oil pump.

[0053] Furthermore, the fourth control unit includes:

[0054] A fourth control subunit, used for controlling the oil pump to operate according to a preset low speed;

[0055] A fourth acquisition subunit, used for acquiring the current stator temperature of the fourth motor after the vehicle enters the lower high-voltage state;

[0056] a fourth determining subunit, configured to determine a release delay time according to a stator temperature of the fourth motor;

[0057] The fourth control subunit is further used to control the oil pump to stop running after the release delay time.

[0058] A third aspect of the present application provides an electronic device, comprising a memory and a processor, wherein the memory is used to store a computer program, and the processor runs the computer program to enable the electronic device to execute the vehicle oil pump control method described in any one of the first aspects of the present application.

[0059] A fourth aspect of the present application provides a computer-readable storage medium storing computer program instructions. When the computer program instructions are read and executed by a processor, the vehicle oil pump control method described in any one of the first aspect of the present application is executed.

[0060] The beneficial effects of the present application are as follows: the method and device can address the problem of insufficient lubrication of the motor and reducer at low temperatures. Before the vehicle starts, the oil pump is requested to pre-lubricate, and the oil pump is kept lubricated for a period of time after parking, so as to achieve sufficient lubrication of the motor and reducer at low temperatures, thereby ensuring the safety of the motor and reducer and avoiding NVH problems such as abnormal noise caused by insufficient lubrication. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0062] Figure 1 A schematic flow chart of a vehicle oil pump control method provided in an embodiment of the present application;

[0063] Figure 2 A schematic flow chart of another vehicle oil pump control method provided in an embodiment of the present application;

[0064] Figure 3 A schematic diagram of an example flow chart of a vehicle oil pump control method provided in an embodiment of the present application;

[0065] Figure 4 A schematic diagram of the structure of a vehicle oil pump control device provided in an embodiment of the present application;

[0066] Figure 5 A schematic diagram of the structure of another vehicle oil pump control device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0067] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0068] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0069] Example 1

[0070] Please see Figure 1 , Figure 1 The following is a flow chart of a vehicle oil pump control method provided in this embodiment. The vehicle oil pump control method includes:

[0071] S101. When the vehicle enters a low-pressure state, the oil pump is awakened via the CAN bus.

[0072] S102: When the battery voltage of the vehicle is greater than a preset minimum allowable voltage, control the oil pump to perform pre-lubrication.

[0073] S103: When the vehicle enters a high-pressure state, the oil pump is controlled to rotate continuously.

[0074] S104: When the vehicle enters a driving state and when it is detected that the vehicle is engaged in a preset gear, the vehicle motor is controlled to start running and the oil pump is controlled to perform a continuous lubrication operation.

[0075] S105: When the vehicle enters a parking and power-off state and when it is detected that the vehicle is in N gear, the oil pump is controlled to perform a delayed shutdown operation.

[0076] By implementing this embodiment, the motor controller can request the oil pump to run for a period of time in advance before the vehicle moves to fully pre-lubricate the motor and reducer; the running time is based on the pre-lubrication requirements under different motor stator temperature conditions. In actual application, the motor controller can request the oil pump to start running for pre-lubrication immediately after high voltage is applied, and can determine the battery voltage state when requesting the oil pump for pre-lubrication before high voltage is applied to avoid power feeding caused by the operation of the oil pump. In addition, the motor controller can also determine whether lubrication is needed for a period of time based on the motor temperature after high voltage is applied.

[0077] In this embodiment, the execution subject of the method may be a computing device such as a computer or a server, and no limitation is made in this embodiment.

[0078] In this embodiment, the execution subject of the method may also be a smart device such as a smart phone, a tablet computer, etc., which is not limited in this embodiment.

[0079] It can be seen that the implementation of the vehicle oil pump control method described in this embodiment can wake up and pre-lubricate the oil pump in advance. At the same time, the oil pump is kept lubricated for a period of time after parking, so as to achieve sufficient lubrication of the motor and reducer at low temperatures, ensure the safety of the motor and reducer, avoid NVH problems such as abnormal noise due to insufficient lubrication, and help to extend the performance and service life of the electric drive system.

[0080] Example 2

[0081] Please see Figure 2 , Figure 2 The following is a flow chart of a vehicle oil pump control method provided in this embodiment. The vehicle oil pump control method includes:

[0082] S201. When the vehicle enters a low-pressure state, the oil pump is awakened via the CAN bus.

[0083] In this embodiment, when the vehicle is in a low-voltage power-on state, the oil pump can be awakened through the CAN bus. The low-voltage power-on state can be understood as being in a low-voltage state after power-on.

[0084] S202: When the battery voltage of the vehicle is greater than a preset minimum allowable voltage, obtain the current stator temperature of the first motor.

[0085] In this embodiment, the method can determine the battery voltage through the motor controller. If it is greater than the minimum allowable voltage, the oil pump is controlled to perform pre-lubrication and the current stator temperature of the first motor is obtained at the same time.

[0086] S203: Determine the oil pump lubrication time according to the stator temperature of the first motor.

[0087] In this embodiment, the method can obtain the oil pump running time by looking up a map table according to the current stator temperature of the first motor.

[0088] S204, controlling the oil pump to perform pre-lubrication according to the oil pump lubrication time.

[0089] In this embodiment, the method can realize continuous lubrication based on the operation of the oil pump, and enter the pre-lubrication waiting state after the lubrication is completed.

[0090] S205, control the oil pump to enter the pre-lubrication waiting state.

[0091] S206: When the vehicle is still in a low-pressure state, after a preset period of time, the oil pump is controlled to perform pre-lubrication according to the oil pump lubrication time.

[0092] In this embodiment, the pre-lubrication waiting state is a state in which the vehicle is in a low-pressure state and is waiting for a certain time.

[0093] In this embodiment, the method performs pre-lubrication again after the pre-lubrication waiting state continues for a certain period of time (ie, a preset time period). If high pressure is not applied, pre-lubrication continues to be performed at intervals of a certain period of time.

[0094] S207: When the vehicle enters a high-voltage state, obtain the current stator temperature of the second motor.

[0095] In this embodiment, when the battery main relay is closed and the electric drive is high voltage, so that the vehicle enters a high voltage state, the method can perform the following two operations:

[0096] (1) As in the low pressure state, pre-lubrication is performed at regular intervals;

[0097] (2) The oil pump is requested to keep rotating, and the speed is obtained by looking up the stator temperature map.

[0098] S208. Determine the rotation speed of the first oil pump according to the stator temperature of the second motor.

[0099] S209, controlling the oil pump to maintain the first oil pump speed for continuous rotation.

[0100] S210: When the vehicle enters a driving state and when it is detected that the vehicle is engaged in a preset gear, the vehicle motor is controlled to start running.

[0101] In this embodiment, when the vehicle is shifted into the D gear or the R gear, the motor starts to run.

[0102] S211 . Obtain motor speed, motor torque, and stator temperature of the third motor.

[0103] S212: Determine the second oil pump speed according to the motor speed and the motor torque.

[0104] S213: Compensate the second oil pump speed according to the motor stator temperature to obtain a third oil pump speed.

[0105] In this embodiment, in order to keep the oil pump running, the method requires lubrication and cooling of the motor and reducer. The oil pump speed is obtained by looking up a map table based on torque and speed, and is compensated according to the motor stator temperature.

[0106] S214: Control lubrication of the oil pump according to the rotation speed of the third oil pump.

[0107] S215: When the vehicle enters a parking state and is powered off, and when it is detected that the vehicle is in N gear, the oil pump is controlled to operate according to a preset low speed.

[0108] In this embodiment, when the vehicle is temporarily parked to enter a parking and power-off state, if the vehicle is still in the N gear state, the oil pump is maintained to run continuously at a low speed to maintain lubrication.

[0109] S216. When the vehicle enters the lower high-voltage state, obtain the current stator temperature of the fourth motor.

[0110] S217: Determine a release delay time according to the stator temperature of the fourth motor.

[0111] In this embodiment, when the vehicle is under high pressure, the method judges the release delay to stop the oil pump operation according to the motor stator temperature, and maintains the post-lubrication cooling for a period of time.

[0112] S218, controlling the oil pump to stop running after the release delay time.

[0113] Please see Figure 3 , Figure 3 An example flow chart of a vehicle oil pump control method is shown.

[0114] In this embodiment, the execution subject of the method may be a computing device such as a computer or a server, and no limitation is made in this embodiment.

[0115] In this embodiment, the execution subject of the method may also be a smart device such as a smart phone, a tablet computer, etc., which is not limited in this embodiment.

[0116] It can be seen that the implementation of the vehicle oil pump control method described in this embodiment can wake up and pre-lubricate the oil pump in advance. At the same time, the oil pump is kept lubricated for a period of time after parking, so as to achieve sufficient lubrication of the motor and reducer at low temperatures, ensure the safety of the motor and reducer, avoid NVH problems such as abnormal noise due to insufficient lubrication, and help to extend the performance and service life of the electric drive system.

[0117] Example 3

[0118] Please see Figure 4 , Figure 4 FIG. 1 is a schematic diagram of the structure of a vehicle oil pump control device provided in this embodiment. Figure 4 As shown, the vehicle oil pump control device includes:

[0119] A wake-up unit 310 is used to wake up the oil pump via the CAN bus when the vehicle enters a low-pressure state;

[0120] The first control unit 320 is used to control the oil pump to perform pre-lubrication when the battery voltage of the vehicle is greater than a preset minimum allowable voltage;

[0121] The second control unit 330 is used to control the oil pump to continuously rotate when the vehicle enters a high-pressure state;

[0122] The third control unit 340 is used to control the vehicle motor to start running and control the oil pump to perform continuous lubrication operation when the vehicle enters the driving state and detects that the vehicle is in a preset gear;

[0123] The fourth control unit 350 is used to control the oil pump to perform a delayed shutdown operation when the vehicle enters a parking and power-off state and when it is detected that the vehicle is in N gear.

[0124] In this embodiment, the explanation of the vehicle oil pump control device can refer to the description in Embodiment 1 or Embodiment 2, and will not be further elaborated in this embodiment.

[0125] It can be seen that the vehicle oil pump control device described in this embodiment can wake up and pre-lubricate the oil pump in advance. At the same time, the oil pump can be kept lubricated for a period of time after parking, so as to achieve sufficient lubrication of the motor and reducer at low temperatures, ensure the safety of the motor and reducer, avoid NVH problems such as abnormal noise due to insufficient lubrication, and help to extend the performance and service life of the electric drive system.

[0126] Example 4

[0127] Please see Figure 5 , Figure 5 FIG. 1 is a schematic diagram of the structure of a vehicle oil pump control device provided in this embodiment. Figure 5 As shown, the vehicle oil pump control device includes:

[0128] A wake-up unit 310 is used to wake up the oil pump via the CAN bus when the vehicle enters a low-pressure state;

[0129] The first control unit 320 is used to control the oil pump to perform pre-lubrication when the battery voltage of the vehicle is greater than a preset minimum allowable voltage;

[0130] The second control unit 330 is used to control the oil pump to continuously rotate when the vehicle enters a high-pressure state;

[0131] The third control unit 340 is used to control the vehicle motor to start running and control the oil pump to perform continuous lubrication operation when the vehicle enters the driving state and detects that the vehicle is in a preset gear;

[0132] The fourth control unit 350 is used to control the oil pump to perform a delayed shutdown operation when the vehicle enters a parking and power-off state and when it is detected that the vehicle is in N gear.

[0133] As an optional implementation, the first control unit 320 includes:

[0134] The first acquisition subunit 321 is used to acquire the current stator temperature of the first motor when the battery voltage of the vehicle is greater than a preset minimum allowable voltage;

[0135] A first determining subunit 322, configured to determine the oil pump lubrication time according to the stator temperature of the first motor;

[0136] The first control subunit 323 is used to control the oil pump to perform pre-lubrication according to the lubrication time of the oil pump.

[0137] As an optional implementation, the first control subunit 323 is also used to control the oil pump to enter a pre-lubrication waiting state;

[0138] The first control subunit 323 is further configured to control the oil pump to perform pre-lubrication according to the oil pump lubrication time after a preset time period when the vehicle is still in a low-pressure state.

[0139] As an optional implementation manner, the second control unit 330 includes:

[0140] The second acquisition subunit 331 is used to acquire the current stator temperature of the second motor when the vehicle enters the high-voltage state;

[0141] A second determination subunit 332, configured to determine a first oil pump speed according to a stator temperature of a second motor;

[0142] The second control subunit 333 is used to control the oil pump to maintain the first oil pump speed for continuous rotation.

[0143] As an optional implementation manner, the third control unit 340 includes:

[0144] The third acquisition subunit 341 is used to acquire the motor speed, the motor torque and the stator temperature of the third motor;

[0145] A third determination subunit 342 is used to determine the second oil pump speed according to the motor speed and the motor torque;

[0146] The compensation subunit 343 is used to compensate the second oil pump speed according to the motor stator temperature to obtain a third oil pump speed;

[0147] The third control subunit 344 is used to control the lubrication of the oil pump according to the third oil pump speed.

[0148] As an optional implementation manner, the fourth control unit 350 includes:

[0149] The fourth control subunit 351 is used to control the oil pump to operate according to a preset low speed;

[0150] The fourth acquisition subunit 352 is used to acquire the current stator temperature of the fourth motor when the vehicle enters the lower high-voltage state;

[0151] A fourth determining subunit 353, configured to determine a release delay time according to a stator temperature of a fourth motor;

[0152] The fourth control subunit 351 is further used to control the oil pump to stop running after the release delay time.

[0153] In this embodiment, the explanation of the vehicle oil pump control device can refer to the description in Embodiment 1 or Embodiment 2, and will not be further elaborated in this embodiment.

[0154] It can be seen that the vehicle oil pump control device described in this embodiment can wake up and pre-lubricate the oil pump in advance. At the same time, the oil pump can be kept lubricated for a period of time after parking, so as to achieve sufficient lubrication of the motor and reducer at low temperatures, ensure the safety of the motor and reducer, avoid NVH problems such as abnormal noise due to insufficient lubrication, and help to extend the performance and service life of the electric drive system.

[0155] An embodiment of the present application provides an electronic device, including a memory and a processor, wherein the memory is used to store a computer program, and the processor runs the computer program to enable the electronic device to execute the vehicle oil pump control method in embodiment 1 or embodiment 2 of the present application.

[0156] An embodiment of the present application provides a computer-readable storage medium storing computer program instructions. When the computer program instructions are read and executed by a processor, the vehicle oil pump control method in Embodiment 1 or Embodiment 2 of the present application is executed.

[0157] In several embodiments provided in the present application, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely schematic. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architecture, functions and operations of the devices, methods and computer program products according to multiple embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of a code, and the module, a program segment or a part of a code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, and the combination of boxes in the block diagram and / or flowchart can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0158] In addition, the functional modules in the various embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

[0159] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0160] The above description is only an embodiment of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0161] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0162] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. A vehicle oil pump control method, characterized in that: include: When the vehicle enters a low-pressure state, the oil pump is awakened via the CAN bus; When the battery voltage of the vehicle is greater than a preset minimum allowable voltage, controlling the oil pump to perform pre-lubrication; When the vehicle enters a high-pressure state, the oil pump is controlled to rotate continuously; When the vehicle enters the driving state and when it is detected that the vehicle is in a preset gear, the vehicle motor is controlled to start running, and the oil pump is controlled to perform continuous lubrication operation; When the vehicle enters a parking and power-off state, and when it is detected that the vehicle is in N gear, the oil pump is controlled to perform a delayed shutdown operation.

2. The vehicle oil pump control method according to claim 1, characterized in that: The controlling the oil pump to perform pre-lubrication comprises: Get the current stator temperature of the first motor; determining the lubrication time of the oil pump according to the stator temperature of the first motor; The oil pump is controlled to perform pre-lubrication according to the lubrication time of the oil pump.

3. The vehicle oil pump control method according to claim 2, characterized in that: After controlling the oil pump to perform pre-lubrication according to the lubrication time of the oil pump, the method further includes: Controlling the oil pump to enter a pre-lubrication waiting state; When the vehicle is still in a low-pressure state, after a preset period of time, the step of controlling the oil pump to perform pre-lubrication according to the oil pump lubrication time is performed.

4. The vehicle oil pump control method according to claim 1, characterized in that: The step of controlling the oil pump to continuously rotate comprises: Get the current stator temperature of the second motor; determining a first oil pump speed according to a stator temperature of the second motor; The oil pump is controlled to maintain the first oil pump speed for continuous rotation.

5. The vehicle oil pump control method according to claim 1, characterized in that: The controlling the oil pump to perform continuous lubrication operation comprises: Obtaining motor speed, motor torque and stator temperature of the third motor; determining a second oil pump speed according to the motor speed and the motor torque; Compensating the second oil pump speed according to the motor stator temperature to obtain a third oil pump speed; Lubrication of the oil pump is controlled according to the third oil pump speed.

6. The vehicle oil pump control method according to claim 1, characterized in that: The controlling the oil pump to perform a delayed closing operation includes: Controlling the oil pump to operate according to a preset low speed; When the vehicle enters the lower high-voltage state, obtaining the current stator temperature of the fourth motor; determining a release delay time according to the stator temperature of the fourth motor; The oil pump is controlled to stop running after the release delay time.

7. A vehicle oil pump control device, characterized in that: The vehicle oil pump control device comprises: A wake-up unit is used to wake up the oil pump via the CAN bus when the vehicle enters a low-pressure state; a first control unit, configured to control the oil pump to perform pre-lubrication when the battery voltage of the vehicle is greater than a preset minimum allowable voltage; A second control unit is used to control the oil pump to continuously rotate when the vehicle enters a high-pressure state; A third control unit is used to control the vehicle motor to start running and control the oil pump to perform continuous lubrication operation when the vehicle enters a driving state and detects that the vehicle is in a preset gear; The fourth control unit is used to control the oil pump to perform a delayed shutdown operation when the vehicle enters a parking and power-off state and when it is detected that the vehicle is in N gear.

8. The vehicle oil pump control device according to claim 7, characterized in that: The first control unit comprises: A first acquisition subunit, used for acquiring a current stator temperature of the first motor when the battery voltage of the vehicle is greater than a preset minimum allowable voltage; a first determining subunit, configured to determine an oil pump lubrication time according to a stator temperature of the first motor; The first control subunit is used to control the oil pump to perform pre-lubrication according to the lubrication time of the oil pump.

9. An electronic device, characterized in that: The electronic device comprises a memory and a processor, the memory is used to store a computer program, and the processor runs the computer program to enable the electronic device to execute the vehicle oil pump control method according to any one of claims 1 to 6.

10. A readable storage medium, characterized in that: The readable storage medium stores computer program instructions, and when the computer program instructions are read and executed by a processor, the vehicle oil pump control method according to any one of claims 1 to 6 is executed.

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