A method, device, storage medium and equipment for controlling an electric oil pump of a vehicle

Abstract

The present invention discloses a vehicle electric oil pump control method, including obtaining the initial output flow of the electric oil pump in the current operation when a communication failure of the electric oil pump is detected; controlling the electric oil pump to adjust the initial output flow according to a preset flow adjustment strategy, so that the electric oil pump operates according to the adjusted output flow; during the operation, obtaining the real-time output flow and real-time bus current of the electric oil pump; comparing the real-time bus current with a preset bus current threshold to obtain a first comparison result, and comparing the real-time output flow with a preset maximum output flow threshold to obtain a second comparison result; obtaining the corresponding electric oil pump protection strategy according to the first comparison result and the second comparison result, so as to adjust the initial output flow of the electric oil pump according to the electric oil pump protection strategy. The embodiment of the present invention performs autonomous adjustment when a communication failure occurs in the electric oil pump, and can meet the cooling requirements of the electric drive system while protecting itself.

Description

Technical Field

[0001] The present invention relates to the technical field of electric oil pump control, and in particular to a method, device, storage medium and equipment for controlling an electric oil pump of a vehicle. Background Art

[0002] With the popularity of new energy vehicles, people are exposed to and even use new energy vehicles in more and more scenes and frequencies in their daily lives. The electric oil pump of new energy vehicles currently on the market operates as an actuator. It controls its own operation by accepting speed requests from the host computer or other request-end ECU, thereby achieving the purpose of providing cooling and lubrication for the electric drive system. When the host computer or other request-end ECU loses connection with the electric oil pump, the electric oil pump has no way to receive its correct instructions or cannot receive instructions. At this time, the electric oil pump will execute the following strategies to protect itself: the electric oil pump stops working or the electric oil pump power runs at a certain speed. However, the above two current solutions have the following problems:

[0003] (1) The oil pump stops working. The electric oil pump stops completely, stops supplying oil to the electric drive system, and the drive motor detects overtemperature. The vehicle power system interrupts power output or reduces power to protect the electric drive system. If this happens in a high-speed road with heavy traffic, it may lead to safety accidents such as rear-end collisions.

[0004] (2) The oil pump reduces power and runs at a certain speed. The electric oil pump should independently judge and reduce its own output power to a certain level to ensure partial output, so as to ensure that the electric drive system of the whole vehicle does not overheat under certain circumstances and reduce power or interrupt power output. To a certain extent, it greatly ensures safety, but the oil pump does not operate at the maximum output and cannot completely guarantee that the electric drive system will not overheat under all working conditions. In addition, due to different ambient temperatures, the viscosity of the oil is different, but the set speed of the electric oil pump is a fixed value. This will happen when communication is lost at extremely low temperatures. Due to the high viscosity of the oil at low temperatures, the oil pump will run at a large load and cannot reach the set speed. At this temperature, the heat dissipation of the electric drive system does not require such a large flow rate, and continuous large loads may cause the oil pump to burn out or easily trigger the oil pump's self-protection strategy, resulting in shutdown. Summary of the invention

[0005] The purpose of the embodiments of the present invention is to provide a vehicle electric oil pump control method, device, storage medium and equipment, which can perform autonomous adjustment when a communication failure occurs in the electric oil pump, thereby protecting the electric oil pump itself while meeting the cooling requirements of the electric drive system.

[0006] To achieve the above object, an embodiment of the present invention provides a method for controlling an electric oil pump of a vehicle, comprising:

[0007] When a communication failure of the electric oil pump is detected, the initial output flow of the electric oil pump is obtained;

[0008] Controlling the electric oil pump to adjust the initial output flow rate according to a preset flow rate adjustment strategy, so that the electric oil pump operates according to the adjusted output flow rate;

[0009] During the operation of the electric oil pump, obtaining the real-time output flow and real-time bus current of the electric oil pump;

[0010] Comparing the real-time bus current with a preset bus current threshold to obtain a first comparison result, and comparing the real-time output flow with a preset maximum output flow threshold to obtain a second comparison result;

[0011] A corresponding electric oil pump protection strategy is acquired according to the first comparison result and the second comparison result, so as to adjust an initial output flow of the electric oil pump according to the electric oil pump protection strategy.

[0012] As an improvement of the above solution, when the first comparison result is that the real-time bus current is less than the bus current threshold, and the second comparison result is that the real-time output flow is greater than or equal to the maximum output flow threshold, the electric oil pump protection strategy includes:

[0013] Controlling the electric oil pump to operate according to the maximum output flow threshold;

[0014] During the operation of the electric oil pump, obtaining the real-time bus current;

[0015] When the real-time bus current is greater than or equal to the bus current threshold, the product of the maximum output flow threshold and a preset first flow coefficient is assigned to the initial output flow.

[0016] As an improvement of the above solution, the electric oil pump protection strategy also includes:

[0017] When the real-time bus current is less than the bus current threshold, the electric oil pump is controlled to continue operating according to the maximum output flow threshold.

[0018] As an improvement of the above solution, when the first comparison result is that the real-time bus current is less than the bus current threshold, and the second comparison result is that the real-time output flow is less than the maximum output flow threshold, the electric oil pump protection strategy includes:

[0019] The real-time output flow is assigned to the initial output flow.

[0020] As an improvement of the above solution, when the first comparison result is that the real-time bus current is greater than or equal to the bus current threshold, and the second comparison result is that the real-time output flow is greater than or equal to the maximum output flow threshold, the electric oil pump protection strategy includes:

[0021] The product of the real-time output flow and a preset second flow coefficient is assigned to the initial output flow.

[0022] As an improvement of the above solution, when the first comparison result is that the real-time bus current is greater than or equal to the bus current threshold, and the second comparison result is that the real-time output flow is less than the maximum output flow threshold, the electric oil pump protection strategy includes:

[0023] Controlling the electric oil pump to operate according to a target output flow rate, wherein the target output flow rate is specifically a product of the real-time output flow rate and a preset third flow coefficient;

[0024] During the operation of the electric oil pump, obtaining the real-time bus current;

[0025] When the real-time bus current is greater than or equal to the bus current threshold, the product of the real-time output flow and a preset fourth flow coefficient is assigned to the initial output flow, wherein the fourth flow coefficient is smaller than the third flow coefficient.

[0026] As an improvement of the above solution, the electric oil pump protection strategy also includes:

[0027] When the real-time bus current is less than the bus current threshold, the target output flow is assigned to the initial output flow.

[0028] To achieve the above object, an embodiment of the present invention further provides an electric oil pump control device for a vehicle, comprising:

[0029] An initial output flow acquisition module is used to acquire the initial output flow of the electric oil pump when a communication failure of the electric oil pump is detected;

[0030] An output flow control module, used to control the electric oil pump to adjust the initial output flow according to a preset flow adjustment strategy, so that the electric oil pump operates according to the adjusted output flow;

[0031] A real-time data acquisition module, used to acquire the real-time output flow and real-time bus current of the electric oil pump during the operation of the electric oil pump;

[0032] A comparison result acquisition module, used for comparing the real-time bus current with a preset bus current threshold to obtain a first comparison result, and for comparing the real-time output flow with a preset maximum output flow threshold to obtain a second comparison result;

[0033] The electric oil pump control module is used to obtain a corresponding electric oil pump protection strategy according to the first comparison result and the second comparison result, so as to adjust an initial output flow of the electric oil pump according to the electric oil pump protection strategy.

[0034] To achieve the above objectives, an embodiment of the present invention also provides a terminal device, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein the processor implements the vehicle electric oil pump control method as described in any one of the above items when executing the computer program.

[0035] To achieve the above-mentioned purpose, an embodiment of the present invention further provides a computer-readable storage medium, which includes a stored computer program; wherein, when the computer program is running, it controls the device where the computer-readable storage medium is located to execute the vehicle electric oil pump control method as described in any one of the above items.

[0036] Compared with the prior art, the embodiment of the present invention provides a vehicle electric oil pump control method, device, storage medium and equipment. When the communication failure of the electric oil pump is detected, the electric oil pump is controlled to operate according to the adjusted output flow, and during its operation, the real-time output flow and real-time bus current of the electric oil pump are obtained. Finally, according to the first comparison result of the real-time bus current and the preset bus current threshold, and the second comparison result of the real-time output flow and the preset maximum output flow threshold, the corresponding electric oil pump protection strategy is obtained to adjust the initial output flow of the electric oil pump. It can be seen that the embodiment of the present invention can protect the electric oil pump itself while meeting the cooling requirements of the electric drive system by dynamically adjusting the initial output flow of the electric oil pump according to the real-time bus current and real-time output flow of the electric oil pump when the communication failure of the electric oil pump occurs. On the one hand, it avoids the situation that the electric oil pump cannot cover the extremely low temperature and high temperature conditions at the same time when it runs at a fixed output flow, thereby causing the electric oil pump to be overloaded or damaged. On the other hand, it avoids the situation that the electric drive system is driven at a reduced power due to insufficient output flow under high temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a flow chart of a vehicle electric oil pump control method provided by an embodiment of the present invention;

[0038] Figure 2is another flow chart of a vehicle electric oil pump control method provided by an embodiment of the present invention;

[0039] Figure 3 is a structural block diagram of an electric oil pump control device for a vehicle provided by an embodiment of the present invention;

[0040] Figure 4 It is a structural block diagram of a terminal device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] See also Figure 1 , Figure 1 1 is a flow chart of a vehicle electric oil pump control method provided by an embodiment of the present invention, the vehicle electric oil pump control method comprising:

[0043] S1. When a communication failure of the electric oil pump is detected, an initial output flow rate of the electric oil pump is obtained;

[0044] S2, controlling the electric oil pump to adjust the initial output flow rate according to a preset flow rate adjustment strategy, so that the electric oil pump operates according to the adjusted output flow rate;

[0045] S3. During the operation of the electric oil pump, obtaining the real-time output flow and real-time bus current of the electric oil pump;

[0046] S4, comparing the real-time bus current with a preset bus current threshold to obtain a first comparison result, and comparing the real-time output flow with a preset maximum output flow threshold to obtain a second comparison result;

[0047] S5. Acquire a corresponding electric oil pump protection strategy according to the first comparison result and the second comparison result, so as to adjust an initial output flow rate of the electric oil pump according to the electric oil pump protection strategy.

[0048] It is worth noting that the vehicle electric oil pump control method described in the embodiment of the present invention is implemented by a controller in the vehicle electric oil pump, and the controller integrates multiple functions such as data processing and data communication, and has powerful business scheduling functions and data processing capabilities. The controller can establish a connection with the electric oil pump motor through the CAN bus and the LIN bus, so as to adjust the initial output flow of the electric oil pump according to the acquired electric oil pump protection strategy. It can be understood that the size of the output flow of the electric oil pump can represent the size of the electric oil pump speed, and the two are proportional.

[0049] Specifically, in step S1, when the communication of the electric oil pump is erroneous or interrupted, the electric oil pump receives an invalid instruction or does not receive an instruction, at which point the communication of the electric oil pump fails, thereby losing control of the electric oil pump. It is understandable that signal interference, physical wiring harness connection breakage or looseness, host computer or other request end ECU (Electronic Control Unit) downtime or failure may all cause communication errors or interruptions of the electric oil pump.

[0050] Specifically, in step S2, the flow regulation strategy is to control the initial output flow to operate at a fixed rate of change, and the fixed rate of change can be set according to an empirical value, and the present invention does not make specific limitations here. By setting the fixed rate of change, it can be ensured that the electric oil pump can still operate normally after a communication failure occurs, and the real-time output flow is constantly changing during operation, so as to avoid the output flow of the electric oil pump remaining unchanged, and the electric oil pump will not always run at a single speed.

[0051] Specifically, in steps S3 to S4, during the operation of the electric oil pump, the real-time output flow and the real-time bus current of the electric oil pump are obtained, and then the real-time bus current is compared with a preset bus current threshold to obtain a first comparison result, and the real-time output flow is compared with a preset maximum output flow threshold to obtain a second comparison result;

[0052] Specifically, in step S5, there are four specific cases for the first comparison result and the second comparison result, which are steps S51 to S54, and there are also four corresponding electric oil pump protection strategies.

[0053] S51: The first comparison result is that the real-time bus current is less than the bus current threshold, and the second comparison result is that the real-time output flow is greater than or equal to the maximum output flow threshold. At this time, the electric oil pump protection strategy includes S511 to S54:

[0054] S511, controlling the electric oil pump to operate according to the maximum output flow threshold;

[0055] S512, obtaining the real-time bus current during the operation of the electric oil pump;

[0056] S513, when the real-time bus current is greater than or equal to the bus current threshold, assigning the product of the maximum output flow threshold and a preset first flow coefficient to the initial output flow;

[0057] S514: When the real-time bus current is less than the bus current threshold, control the electric oil pump to continue operating according to the maximum output flow threshold.

[0058] It should be noted that when the electric oil pump operates according to the maximum output flow threshold, the entire electric drive system is in a dynamic cycle, which means that the load of the electric oil pump will change, so that the bus current at the maximum output flow threshold is a dynamically changing value. At this time, the real-time bus current and the bus current threshold are compared; when the real-time bus current is greater than or equal to the bus current threshold, the product of the maximum output flow threshold and the preset first flow coefficient is assigned to the initial output flow, for example, the first flow coefficient is 0.2. It is worth noting that the first flow coefficient can be set according to an empirical value, and the present invention does not make specific limitations here; when the real-time bus current is less than the bus current threshold, the electric oil pump is controlled to continue to operate according to the maximum output flow threshold to achieve a certain dynamic balance, so that the output flow can meet the heat dissipation requirements of the drive system motor in this case.

[0059] S52: The first comparison result is that the real-time bus current is less than the bus current threshold, and the second comparison result is that the real-time output flow is less than the maximum output flow threshold. At this time, the electric oil pump protection strategy includes step S521:

[0060] S521. Assign the real-time output flow to the initial output flow.

[0061] It should be noted that when the first comparison result is that the real-time bus current is less than the bus current threshold, and the second comparison result is that the real-time output flow is less than the maximum output flow threshold, the electric oil pump is in a normal operating condition. At this time, the real-time output flow is assigned to the initial output flow to control the electric oil pump to continue to adjust the initial output flow according to the preset flow regulation strategy, and operate according to the adjusted output flow, which can meet the cooling requirements of the electric drive system.

[0062] S53: The first comparison result is that the real-time bus current is greater than or equal to the bus current threshold, and the second comparison result is that the real-time output flow is greater than or equal to the maximum output flow threshold. At this time, the electric oil pump protection strategy includes step S531:

[0063] S531. Assign the product of the real-time output flow and a preset second flow coefficient to the initial output flow.

[0064] It should be noted that when the first comparison result is that the real-time bus current is greater than or equal to the bus current threshold, and the second comparison result is that the real-time output flow is greater than or equal to the maximum output flow threshold, the electric oil pump is in a limit condition. At this time, the product of the real-time output flow and the preset second flow coefficient is assigned to the initial output flow, resulting in a large load on the electric oil pump, thereby affecting the life of the oil pump. For example, the second flow coefficient is 0.2. It is worth noting that the second flow coefficient can be set according to an empirical value, and the present invention does not make specific limitations here.

[0065] S54: The first comparison result is that the real-time bus current is greater than or equal to the bus current threshold, and the second comparison result is that the real-time output flow is less than the maximum output flow threshold. The electric oil pump protection strategy includes steps S541 to S544:

[0066] S541, controlling the electric oil pump to operate according to a target output flow rate, wherein the target output flow rate is specifically a product of the real-time output flow rate and a preset third flow coefficient;

[0067] S542, obtaining the real-time bus current during the operation of the electric oil pump;

[0068] S543, when the real-time bus current is greater than or equal to the bus current threshold, assigning the product of the real-time output flow and a preset fourth flow coefficient to the initial output flow, wherein the fourth flow coefficient is less than the third flow coefficient;

[0069] S544. When the real-time bus current is less than the bus current threshold, assign the target output flow to the initial output flow.

[0070] It should be noted that, when the first comparison result is that the real-time bus current is greater than or equal to the bus current threshold, and the second comparison result is that the real-time output flow is less than the maximum output flow threshold, the electric oil pump is in an extremely low temperature condition, its load is large and the flow is very low. At this time, the electric oil pump is controlled to operate according to the target output flow. In theory, when the electric oil pump operates according to the target output flow, the bus current will decrease, and then the real-time bus current and the bus current threshold are compared; when the real-time bus current is greater than or equal to the bus current threshold, the product of the real-time output flow and the preset fourth flow coefficient is assigned to the initial output flow to minimize the operating condition of the oil pump, wherein the fourth The flow coefficient is less than the third flow coefficient. It can be understood that when the electric oil pump operates according to the target output flow, that is, the product of the real-time output flow and the third flow coefficient, the bus current of the electric oil pump has not dropped below the bus current threshold, and the electric oil pump is still in a state of heavy load and low flow. At this time, the product of the real-time output flow and the fourth flow coefficient (the fourth flow coefficient is less than the third flow coefficient) is assigned to the initial flow to continue to reduce the bus current, so that the operating condition of the oil pump is reduced to the minimum, thereby controlling the electric oil pump to continue to adjust the initial output flow according to the preset flow regulation strategy; when the real-time bus current is less than the bus current threshold, the target output flow is assigned to the initial output flow. For example, the third flow coefficient is 0.8, and the fourth flow coefficient is 0.2. It is worth noting that the third flow coefficient and the fourth flow coefficient can be set according to empirical values, and the present invention is not specifically limited here.

[0071] Furthermore, if Figure 2 As shown, when a communication failure of the electric oil pump is detected, the electric oil pump control method specifically includes:

[0072] Obtain and record the initial output flow rate XL / min (0≤X≤M) of the current operation;

[0073] Controlling the electric oil pump to adjust the initial output flow rate according to a fixed change rate, so that the electric oil pump operates according to the adjusted output flow rate;

[0074] During the operation of the electric oil pump, the real-time output flow rate P1 L / min and the real-time bus current IA of the electric oil pump are obtained;

[0075] When the real-time bus current IA is less than the bus current threshold NA, and the real-time output flow rate P1 L / min is greater than or equal to the maximum output flow rate threshold ML / min, the electric oil pump is controlled to operate according to the maximum output flow rate threshold ML / min. At this time, the comparison result between the real-time bus current IA and the bus current threshold NA when the electric oil pump is operating at the maximum output flow rate threshold is determined; when the real-time bus current IA is greater than or equal to the bus current threshold NA, the maximum output flow rate threshold ML / min*0.2 is assigned to the initial output flow rate XL / min, and the initial judgment stage is re-entered; when the real-time bus current IA is less than the bus current threshold NA, the electric oil pump is controlled to continue to operate according to the maximum output flow rate threshold ML / min, so as to achieve a certain dynamic balance within the cycle;

[0076] When the real-time bus current IA is less than the bus current threshold NA, and the real-time output flow rate P1 L / min is less than the maximum output flow rate threshold ML / min, the real-time output flow rate P1 L / min is assigned to the initial output flow rate XL / min, and the process returns to the initial judgment stage.

[0077] When the real-time bus current IA≥bus current threshold NA, and the real-time output flow P1 L / min≥maximum output flow threshold ML / min, the real-time output flow P1 L / min*0.2 is assigned to the initial output flow XL / min, and returns to the initial judgment stage.

[0078] When the real-time bus current IA≥bus current threshold NA, and the real-time output flow P1 L / min<maximum output flow threshold ML / min, the electric oil pump is controlled to operate according to the preset target output flow=real-time output flow P1 L / min*0.8. At this time, the comparison result of the real-time bus current IA and the bus current threshold NA is judged; when the real-time bus current IA≥bus current threshold NA, the real-time output flow P1L / min*0.2 is assigned to the initial output flow, and the process returns to the initial judgment stage; when the real-time bus current IA<bus current threshold NA, the target output flow is assigned to the initial output flow, and the process returns to the initial judgment stage.

[0079] A vehicle electric oil pump control method provided by an embodiment of the present invention can protect the electric oil pump itself while meeting the cooling requirements of the electric drive system by dynamically adjusting the initial output flow of the electric oil pump in real time according to the real-time bus current and real-time output flow of the electric oil pump when a communication failure occurs in the electric oil pump. On the one hand, it avoids the situation where the electric oil pump cannot cover both extremely low temperature and high temperature conditions when operating at a fixed output flow, thereby causing overload protection or damage to the electric oil pump. On the other hand, it avoids the situation where the electric drive system reduces power due to insufficient output flow under high temperature conditions.

[0080] See also Figure 3 , Figure 3 1 is a structural block diagram of a vehicle electric oil pump control device 10 provided in an embodiment of the present invention, wherein the vehicle electric oil pump control device comprises:

[0081] The initial output flow acquisition module 11 is used to acquire the initial output flow of the electric oil pump when a communication failure of the electric oil pump is detected;

[0082] An output flow control module 12, used to control the electric oil pump to adjust the initial output flow according to a preset flow adjustment strategy, so that the electric oil pump operates according to the adjusted output flow;

[0083] A real-time data acquisition module 13, used to acquire the real-time output flow and real-time bus current of the electric oil pump during the operation of the electric oil pump;

[0084] A comparison result acquisition module 14 is used to compare the real-time bus current with a preset bus current threshold to obtain a first comparison result, and to compare the real-time output flow with a preset maximum output flow threshold to obtain a second comparison result;

[0085] The electric oil pump control module 15 is used to obtain a corresponding electric oil pump protection strategy according to the first comparison result and the second comparison result, so as to adjust an initial output flow of the electric oil pump according to the electric oil pump protection strategy.

[0086] It is worth noting that the working process of each module in the vehicle electric oil pump control device 10 described in the embodiment of the present invention can refer to the working process of the vehicle electric oil pump control method described in the above embodiment, and will not be repeated here.

[0087] An electric oil pump control device 10 for a vehicle provided in an embodiment of the present invention can protect the electric oil pump itself while meeting the cooling requirements of the electric drive system by dynamically adjusting the initial output flow of the electric oil pump in real time according to the real-time bus current and real-time output flow of the electric oil pump when a communication failure occurs in the electric oil pump. On the one hand, it avoids the situation where the electric oil pump cannot cover both extremely low temperature and high temperature conditions when operating at a fixed output flow, thereby causing overload protection or damage to the electric oil pump. On the other hand, it avoids the situation where the electric drive system has to reduce power due to insufficient output flow under high temperature conditions.

[0088] An embodiment of the present invention also provides a computer-readable storage medium, which includes a stored computer program; wherein, when the computer program is running, it controls the device where the computer-readable storage medium is located to execute the vehicle electric oil pump control method as described in the above embodiment.

[0089] See also Figure 4 , Figure 4 : is a structural block diagram of a terminal device 20 provided in an embodiment of the present invention, and the terminal device 20 includes: a processor 21, a memory 22, and a computer program stored in the memory 22 and executable on the processor 21. When the processor 21 executes the computer program, the steps in the above-mentioned vehicle electric oil pump control method embodiment are implemented. Alternatively, when the processor 21 executes the computer program, the functions of each module / unit in the above-mentioned device embodiments are implemented.

[0090] Exemplarily, the computer program may be divided into one or more modules / units, which are stored in the memory 22 and executed by the processor 21 to implement the present invention. The one or more modules / units may be a series of computer program instruction segments capable of implementing specific functions, which are used to describe the execution process of the computer program in the terminal device 20.

[0091] The terminal device 20 may be a computing device such as a desktop computer, a notebook, a PDA, a cloud server, etc. The terminal device 20 may include, but is not limited to, a processor 21 and a memory 22. Those skilled in the art may understand that the schematic diagram is only an example of the terminal device 20 and does not constitute a limitation on the terminal device 20. The terminal device 20 may include more or fewer components than shown in the figure, or may combine certain components, or different components. For example, the terminal device 20 may also include input and output devices, network access devices, buses, etc.

[0092] The processor 21 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc. The processor 21 is the control center of the terminal device 20, and uses various interfaces and lines to connect various parts of the entire terminal device 20.

[0093] The memory 22 can be used to store the computer program and / or module. The processor 21 implements various functions of the terminal device 20 by running or executing the computer program and / or module stored in the memory 22 and calling the data stored in the memory 22. The memory 22 can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area can store data created according to the use of the mobile phone (such as audio data, a phone book, etc.), etc. In addition, the memory 22 can include a high-speed random access memory, and can also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0094] Wherein, if the module / unit integrated in the terminal device 20 is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the present invention implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor 21. Wherein, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium, etc.

[0095] It should be noted that the device embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. In addition, in the accompanying drawings of the device embodiments provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, which may be specifically implemented as one or more communication buses or signal lines. A person of ordinary skill in the art may understand and implement it without paying any creative effort.

[0096] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A method for controlling an electric oil pump of a vehicle, characterized in that: include: When a communication failure of the electric oil pump is detected, the initial output flow of the electric oil pump is obtained; Controlling the electric oil pump to adjust the initial output flow rate according to a preset flow rate adjustment strategy, so that the electric oil pump operates according to the adjusted output flow rate; During the operation of the electric oil pump, obtaining the real-time output flow and real-time bus current of the electric oil pump; Comparing the real-time bus current with a preset bus current threshold to obtain a first comparison result, and comparing the real-time output flow with a preset maximum output flow threshold to obtain a second comparison result; acquiring a corresponding electric oil pump protection strategy according to the first comparison result and the second comparison result, so as to adjust an initial output flow rate of the electric oil pump according to the electric oil pump protection strategy; When the first comparison result is that the real-time bus current is less than the bus current threshold, and the second comparison result is that the real-time output flow is greater than or equal to the maximum output flow threshold, the electric oil pump protection strategy includes: Controlling the electric oil pump to operate according to the maximum output flow threshold; During the operation of the electric oil pump, obtaining the real-time bus current; When the real-time bus current is greater than or equal to the bus current threshold, the product of the maximum output flow threshold and a preset first flow coefficient is assigned to the initial output flow.

2. The vehicle electric oil pump control method according to claim 1, characterized in that: The electric oil pump protection strategy also includes: When the real-time bus current is less than the bus current threshold, the electric oil pump is controlled to continue operating according to the maximum output flow threshold.

3. The vehicle electric oil pump control method according to claim 1, characterized in that: When the first comparison result is that the real-time bus current is less than the bus current threshold, and the second comparison result is that the real-time output flow is less than the maximum output flow threshold, the electric oil pump protection strategy includes: The real-time output flow is assigned to the initial output flow.

4. The vehicle electric oil pump control method according to claim 1, characterized in that: When the first comparison result is that the real-time bus current is greater than or equal to the bus current threshold, and the second comparison result is that the real-time output flow is greater than or equal to the maximum output flow threshold, the electric oil pump protection strategy includes: The product of the real-time output flow and a preset second flow coefficient is assigned to the initial output flow.

5. The vehicle electric oil pump control method according to claim 1, characterized in that: When the first comparison result is that the real-time bus current is greater than or equal to the bus current threshold, and the second comparison result is that the real-time output flow is less than the maximum output flow threshold, the electric oil pump protection strategy includes: Controlling the electric oil pump to operate according to a target output flow rate, wherein the target output flow rate is specifically a product of the real-time output flow rate and a preset third flow coefficient; During the operation of the electric oil pump, obtaining the real-time bus current; When the real-time bus current is greater than or equal to the bus current threshold, the product of the real-time output flow and a preset fourth flow coefficient is assigned to the initial output flow, wherein the fourth flow coefficient is smaller than the third flow coefficient.

6. The vehicle electric oil pump control method according to claim 5, characterized in that: The electric oil pump protection strategy also includes: When the real-time bus current is less than the bus current threshold, the target output flow is assigned to the initial output flow.

7. A vehicle electric oil pump control device, characterized in that: include: An initial output flow acquisition module is used to acquire the initial output flow of the electric oil pump when a communication failure of the electric oil pump is detected; An output flow control module, used to control the electric oil pump to adjust the initial output flow according to a preset flow adjustment strategy, so that the electric oil pump operates according to the adjusted output flow; A real-time data acquisition module, used to acquire the real-time output flow and real-time bus current of the electric oil pump during the operation of the electric oil pump; A comparison result acquisition module, used for comparing the real-time bus current with a preset bus current threshold to obtain a first comparison result, and for comparing the real-time output flow with a preset maximum output flow threshold to obtain a second comparison result; The electric oil pump control module is used to obtain a corresponding electric oil pump protection strategy according to the first comparison result and the second comparison result, so as to adjust the initial output flow of the electric oil pump according to the electric oil pump protection strategy, specifically: When the first comparison result is that the real-time bus current is less than the bus current threshold, and the second comparison result is that the real-time output flow is greater than or equal to the maximum output flow threshold, the electric oil pump protection strategy includes: Controlling the electric oil pump to operate according to the maximum output flow threshold; During the operation of the electric oil pump, obtaining the real-time bus current; When the real-time bus current is greater than or equal to the bus current threshold, the product of the maximum output flow threshold and a preset first flow coefficient is assigned to the initial output flow.

8. A terminal device, characterized in that: The invention comprises a processor, a memory and a computer program stored in the memory and configured to be executed by the processor, wherein the processor implements the vehicle electric oil pump control method according to any one of claims 1 to 6 when executing the computer program.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored computer program; wherein, when the computer program is run, it controls the device where the computer-readable storage medium is located to execute the vehicle electric oil pump control method according to any one of claims 1 to 6.

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