Electric oil pump control method, apparatus and device, and storage medium

Abstract

Disclosed in the present application are an electric oil pump control method, apparatus and device, and a storage medium. The method comprises: controlling an oil pump control system to enter a system self-test mode and performing a function test; upon detection of a first-level fault, entering a limp mode, so as to allow an oil pump motor system to operate at a rated power output; upon detection of a second-level fault, entering a function failure mode, and performing resetting control, the second-level fault being of a higher level than the first-level fault; if no fault has been detected, controlling the oil pump control system to enter a ready mode; and in case of having entered the ready mode and upon reception of an operating instruction from a permanent magnet synchronous generator controller, controlling the oil pump control system to enter a power output mode.

Description

Electronic oil pump control method, device, equipment and storage medium

[0001] This application claims priority to the Chinese patent application No. 202410409255.7, filed on April 7, 2024, with the Chinese Patent Office, the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of vehicles, in particular to an electronic oil pump method, device, equipment and storage medium. BACKGROUND

[0003] In recent years, under the guidance and support of national policy, new energy vehicles have developed rapidly. New energy vehicles compete with traditional vehicles in the market, and improving the competitiveness of new energy vehicles is fundamental. Electric vehicles currently face core problems such as cost, range, and energy replenishment. At present, REV (range extended electric vehicle) can partially replace in some scenarios. In addition, in high-cold regions, REV has a strong competitive advantage due to the inadaptability of BEV (battery electric vehicle). BEV has strong support, but there are problems such as charging and range for a long time, which restricts development; PHEV (plug-in hybrid electric vehicle) has strong adaptability, but has high system complexity and is mainly used in large vehicles; REV has an advantage over PHEV in control and is the best solution to range, environmental adaptability and other problems. REV is the closest to BEV and can solve the existing problems of BEV. REV range extended electric vehicle is a hybrid electric vehicle that runs purely on electricity. It uses a high-voltage power battery as the main power source and an engine as auxiliary power. The engine does not directly drive the vehicle, but only drives the permanent magnet synchronous generator to generate electricity. Therefore, the structure and power performance are close to those of a pure electric vehicle. The engine can output power and torque in the best fuel economy zone after starting, improving the fuel economy of the vehicle. The range extended electric vehicle first relies on its power battery to travel, at which time the engine is not started. When the battery power drops to a certain level, the engine is started to drive the permanent magnet synchronous generator to generate electricity. The generated electricity is directly used to drive the vehicle, and if there is excess electricity, it can be stored in the power battery. As the only generator unit in the range extender that converts mechanical energy into electrical energy, the permanent magnet synchronous generator controller (GCU) and the permanent magnet synchronous generator (GM) have gained market popularity. In order to improve the rated power density and reliability of the GM, the GM uses oil cooling to directly cool the stator and rotor components inside the permanent magnet synchronous motor, and then removes the heat of the cooling oil inside the GM through a heat exchanger, thereby forming a complete cooling loop closed loop control. The key component of the electronic oil pump EOP that provides circulating operation energy for the cooling loop becomes the heart of the REV vehicle for normal full load operation.

[0004] The mode switching of the oil pump controller system in the existing new energy vehicle is relatively simple, which is divided into initialization mode, power output mode and fault mode. The vehicle running demand and environment demand are not considered, and the oil pump system automatically switches to the most conservative running mode according to its own safety consideration when a fault occurs, without considering the motor system and the demand of the whole vehicle.

[0005] The above content is only used to assist in understanding the technical solutions of the present application, and does not represent the acknowledgement of the above content as prior art. Technical problem

[0006] The main purpose of the present application is to provide an electronic oil pump control method, device, equipment and storage medium, which aims to solve the technical problem of single mode switching of the existing electronic oil pump control system. Technical solution

[0007] In order to achieve the above purpose, the present application provides an electronic oil pump control method applied to an oil pump system, wherein the oil pump system comprises an oil pump control system and an oil pump motor system, and the electronic oil pump control method comprises the following steps:

[0008] controlling the oil pump control system to enter a system self-checking mode and performing function checking;

[0009] when a first level fault is detected, controlling the oil pump control system to enter a limp mode, so that the oil pump motor system runs at rated power output;

[0010] when a second level fault is detected, controlling the oil pump control system to enter a function failure mode and controlling the oil pump motor system to reset, wherein the second level fault is higher than the first level fault;

[0011] when no fault is detected, controlling the oil pump control system to enter a ready mode;

[0012] in the ready mode, when a running instruction of a permanent magnet synchronous generator controller is received, controlling the oil pump control system to enter a power output mode.

[0013] In an embodiment, before the oil pump control system enters the system self-checking mode, the method further comprises:

[0014] when the oil pump control system triggers the initialization mode, initializing and configuring each module of the oil pump control system;

[0015] controlling a power output unit of the oil pump motor system to run at a preset speed for a preset time length.

[0016] In an embodiment, after the oil pump control system enters the power output mode, the method further comprises:

[0017] When the oil pump control system diagnoses a first preset fault in the power output mode, the oil pump control system is controlled to enter a reduced power mode, and the oil pump motor system is controlled to linearly reduce the power output according to the current module temperature, stator temperature, and current value;

[0018] When the oil pump control system diagnoses a second preset fault, the oil pump control system is controlled to enter a function failure mode.

[0019] In an embodiment, the condition for controlling the oil pump control system to enter the reduced power mode includes at least one of the following:

[0020] The power module temperature is within a first preset range;

[0021] The motor electronic temperature is within a second preset range;

[0022] The current signal is within a third preset range.

[0023] In an embodiment, the condition for entering the limp mode includes at least one of the following:

[0024] The current signal is short-circuited or open-circuited;

[0025] The position sampling signal is short-circuited or open-circuited;

[0026] The position sensor phase sequence is abnormal or missing;

[0027] The power module temperature is greater than a first preset temperature or less than a second preset temperature;

[0028] The motor stator temperature is greater than a third preset temperature or less than a fourth preset temperature;

[0029] The communication bus is turned off or the received instruction signal is incorrect;

[0030] The actual rotation speed is less than a preset rotation speed.

[0031] In an embodiment, the condition for entering the function failure mode includes at least one of the following:

[0032] The oil pump motor system operating environment continuously fails for a preset number of times after the oil pump control system is powered on;

[0033] The current is short-circuited;

[0034] The voltage is lower than a preset lower limit or higher than a preset upper limit;

[0035] The motor rotation speed exceeds the highest operating rotation speed.

[0036] In an embodiment, the method further includes:

[0037] When a limp mode exit condition is met, the limp mode is exited and the system self-check mode is re-entered, wherein the limp mode exit condition includes at least a current signal, a position sampling signal, a position sensor, a power module temperature, a motor stator temperature, a communication signal, and a real speed judgment;

[0038] When a power down mode exit condition is met, the power down mode is exited and the power output mode is re-entered, wherein the power down mode exit condition includes at least a current signal, a position sampling signal, a position sensor, a power module temperature, a motor stator temperature, a communication signal, and a real speed judgment;

[0039] When a function failure mode exit condition is met, the function failure mode is exited and the initialization mode is re-entered, wherein the function failure mode exit condition includes at least a system running environment running success number, a current short circuit problem, a voltage, and a motor speed judgment.

[0040] In addition, to achieve the above-mentioned purpose, the present application also proposes an electronic oil pump control device, the device comprising:

[0041] a self-check module for controlling the oil pump control system to enter a system self-check mode and performing a function check;

[0042] a first control module for controlling the oil pump control system to enter a limp mode when a first level fault is detected, so that the oil pump motor system runs at a rated power output;

[0043] a second control module for controlling the oil pump control system to enter a function failure mode when a second level fault is detected, and controlling the oil pump motor system to reset, wherein the second level fault is higher than the first level fault;

[0044] a third control module for controlling the oil pump control system to enter a ready mode when no fault is detected;

[0045] When a running instruction of a permanent magnet synchronous generator controller is received in the ready mode, the oil pump control system is controlled to enter a power output mode.

[0046] In addition, to achieve the above-mentioned purpose, the present application also proposes an electronic oil pump control device, the device comprising: a memory, a processor, and an electronic oil pump control program stored in the memory and executable on the processor, the electronic oil pump control program being configured to implement the steps of the electronic oil pump control method as described above.

[0047] In addition, to achieve the above object, the application further provides a storage medium, wherein the storage medium stores an electronic oil pump control program, and the electronic oil pump control program realizes the steps of the electronic oil pump control method when executed by a processor. Advantages

[0048] The application controls the oil pump control system to enter a system self-checking mode and performs a function check. When a first level fault is detected, the oil pump control system is controlled to enter a limp mode, so that the oil pump motor system operates at a rated power output. When a second level fault is detected, the oil pump control system is controlled to enter a function failure mode, and the oil pump motor system is controlled to reset. The second level fault is higher than the first level fault. When no fault is detected, the oil pump control system enters a ready mode. When a running instruction of the permanent magnet synchronous generator controller is received in the ready mode, the oil pump control system is controlled to enter a power output mode. The reduced power mode improves the reliability of the oil pump controller system, prolongs the service life of the oil pump motor, and improves the reliability of the generator GM. The limp mode meets the basic cooling requirements of the generator, ensures the safe operation of the generator under rated conditions, prevents the function failure of the generator system, and ensures the normal operation of the whole vehicle high pressure system. The function failure mode uses a software reset mode for recoverable operation, which improves the user experience when the generator system fails. BRIEF DESCRIPTION OF DRAWINGS

[0049] Fig. 1 is a structural schematic diagram of an electronic oil pump control device of a hardware running environment related to an embodiment of the application;

[0050] Fig. 2 is a flowchart of a first embodiment of an electronic oil pump control method of the application;

[0051] Fig. 3 is a structural block diagram of an extended range electric vehicle of the first embodiment of the electronic oil pump control method of the application;

[0052] Fig. 4 is a working mode switching diagram of the first embodiment of the electronic oil pump control method of the application;

[0053] Fig. 5 is a flowchart of a second embodiment of an electronic oil pump control method of the application;

[0054] Fig. 6 is a flowchart of a third embodiment of an electronic oil pump control method of the application;

[0055] Fig. 7 is a structural block diagram of a first embodiment of an electronic oil pump control device of the application.

[0056] The implementation, functional features and advantages of the application will be further described with reference to the embodiments and the accompanying drawings. Embodiments of the application

[0057] It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

[0058] Referring to FIG. 1, FIG. 1 is a schematic diagram of an electronic oil pump control device structure of a hardware operating environment related to an embodiment of the present application.

[0059] As shown in FIG. 1, the electronic oil pump control device can include a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used to realize the connection and communication between the components. The user interface 1003 can include a display, an input unit such as a keyboard, and a standard wired interface and a wireless interface. The network interface 1004 includes a standard wired interface and a wireless interface (such as a wireless fidelity (Wi-Fi) interface). The memory 1005 can be a high-speed random access memory (RAM) or a stable non-volatile memory (NVM), such as a disk memory. The memory 1005 can also be a storage device independent of the aforementioned processor 1001.

[0060] Those skilled in the art can understand that the structure shown in FIG. 1 does not constitute a limitation on the electronic oil pump control device, and can include more or fewer components than those shown, or combine certain components, or different component arrangements.

[0061] As shown in FIG. 1, the memory 1005 as a storage medium includes an operating system, a network communication module, a user interface module, and an electronic oil pump control program.

[0062] In the electronic oil pump control device shown in FIG. 1, the network interface 1004 is mainly used for data communication with a network server; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 in the electronic oil pump control device of the present application can be arranged in the electronic oil pump control device, and the electronic oil pump control device calls the electronic oil pump control program stored in the memory 1005 through the processor 1001, and executes the electronic oil pump control method provided by the embodiment of the present application.

[0063] The embodiment of the present application provides an electronic oil pump control method, and referring to FIG. 2, FIG. 2 is a flowchart of a first embodiment of the electronic oil pump control method of the present application.

[0064] In this embodiment, the electronic oil pump control method includes the following steps:

[0065] Step S10: Control the oil pump control system to enter the system self-check mode and perform function check.

[0066] It should be noted that the execution subject of the method of the embodiment can be a terminal device with data processing and program running functions, such as a smart phone, a smart watch, etc., or an electronic device with the same or similar functions, such as the electronic oil pump control device described above. The electronic oil pump control device will be taken as an example to describe the embodiment and each of the following embodiments.

[0067] It can be understood that the control system can control and adjust the operation of the oil pump according to system requirements and working conditions. This may involve controlling the start, stop, speed regulation, flow control, etc. of the oil pump to meet the system's demand for hydraulic or lubrication, and to save energy consumption and improve system efficiency by intelligently adjusting and optimizing the operating parameters of the oil pump. This includes adjusting the operating state of the oil pump according to actual needs, using energy-saving technologies, etc.

[0068] It should be understood that the function check includes running bus frequency check, analog to digital (AD) sampling module function check, speed sampling module function check, communication module function check, input / output (IO) interface function check, and drive output module function check.

[0069] As shown in FIG. 3, FIG. 3 is a structure block diagram of a range extended electric vehicle according to the electronic oil pump control method of the first embodiment. It includes a 12V lead-acid battery, a key, a vehicle control unit (VCU), a high-voltage battery, a battery monitoring and management system (BMS) and a high-voltage power distribution system, a GCU, a GM, an engine and a control unit, an electric drive assembly, wheels, and an oil pump system (oil pump control system and oil pump motor).

[0070] It should be noted that the main role of GCU and GM in the range extender is to generate electricity, and the extended range electric vehicle is a hybrid vehicle that runs purely on electricity, with high-voltage power batteries as the main power source and engines as auxiliary power. The engine does not directly drive the vehicle, but only drives the permanent magnet synchronous generator system to generate electricity, providing a constant source of power for the vehicle power. VCU sends torque demand instructions to GCU, and GCU controls the GM driven by the engine as a power source to convert mechanical energy to electrical energy, providing power for high-voltage batteries and electric drive assemblies. The electric drive assembly and the direct current bus of the GCU are directly connected in parallel, and the electric drive assembly directly drives the vehicle forward or backward. The oil pump system (oil pump control system and oil pump motor) as a key component of the GM provides operating power for the GM cooling system. Ensure that the performance of the GM is achieved. GCU controls the GM while also controlling the operation of the oil pump system.

[0071] It should be understood that VCU is the vehicle controller; GCU is the permanent magnet synchronous generator controller; GM is the permanent magnet synchronous generator; REV (Extended Range Electric Vehicle) is the extended range electric vehicle; PHEV (Plug-in Hybrid Electric Vehicle) is the plug-in hybrid electric vehicle; BEV (Battery Electric Vehicle) is the pure electric vehicle.

[0072] Further, when the oil pump control system triggers the initialization mode, the modules of the oil pump control system are initialized and configured.

[0073] The power output unit of the oil pump motor system is controlled to run at a preset speed for a preset time.

[0074] It should be noted that after the motor control system is powered on, the initialization mode is started, and the operating bus frequency, AD sampling module, speed sampling module, communication module, IO interface and drive output module of the electronic control unit are initialized and configured. The system self-test mode initializes and checks the functions of the initialized modules, and runs the main power output unit of the oil pump motor system at 1000 rpm for 1 min.

[0075] It should be understood that the initialization configuration includes operating bus frequency initialization configuration, which sets the operating bus frequency of the electronic control unit to ensure synchronization of communication with other devices or systems, configures the bus protocol and communication rate;

[0076] The AD sampling module initialization configuration includes determining the sampling rate and resolution of the AD sampling module to meet the system's signal acquisition requirements, configuring analog input channels, reference voltages and gain parameters, etc.

[0077] The speed sampling module initialization configuration includes setting the sampling rate and resolution of the speed sampling module to ensure accurate measurement of the speed signal, configuring the speed sensor type, signal filtering and calibration parameters, etc.

[0078] The communication module initialization configuration includes configuring the working mode and communication protocol of the communication module, such as Universal Asynchronous Receiver / Transmitter (UART), Serial Peripheral Interface (SPI), Inter-Integrated Circuit (I2C), etc., setting communication parameters such as baud rate, data bits, parity bits and stop bits, etc.

[0079] The IO interface initialization configuration includes determining the function and signal mapping of the IO interface, including the definition of input and output signals, configuring the working mode, level state and interrupt trigger condition of the IO port, etc.

[0080] The drive output module initialization configuration includes setting the working mode and output channel of the drive output module, such as Pulse-width modulation (PWM) output, level output, etc., configuring the protection function, current limit and overload protection parameters of the driver.

[0081] Step S20: When the first level fault is detected, the control oil pump control system enters the limp mode to make the oil pump motor system run at rated power output.

[0082] It should be noted that the limp mode is to run at 30% output capacity of the rated power under fixed working conditions, which can be restored.

[0083] In specific implementation, if a general fault occurs in self-checking, the limp running mode is entered to ensure the rated power output of the generator system.

[0084] Further, the conditions for entering the limp mode include at least one of the following:

[0085] Short circuit or open circuit of current signal sampling;

[0086] Short circuit or open circuit of position sampling signal;

[0087] Phase sequence abnormality or phase loss of position sensor;

[0088] The power module temperature is greater than a first preset temperature or less than a second preset temperature;

[0089] The motor stator temperature is greater than a third preset temperature or less than a fourth preset temperature;

[0090] Communication bus off or received command signal error;

[0091] Actual rotation speed is less than preset rotation speed.

[0092] It should be noted that the entering mechanism of the limp mode includes: current signal I sampling short circuit, open circuit fault, position sampling signal Vn short circuit, open circuit fault, position sensor phase sequence abnormality or phase loss, position sensor phase sequence abnormality or phase loss, power module temperature short circuit, open circuit, motor stator temperature short circuit, open circuit, communication bus off or command signal error fault, and actual rotation speed less than 200 rpm.

[0093] Step S30: When a second level fault is detected, the oil pump control system is controlled to enter a functional failure mode, and the oil pump motor system is reset, wherein the second level fault is higher than the first level fault.

[0094] It should be noted that the first level fault and the second level fault can be set according to actual conditions, and are temporarily defined as general faults and serious faults here.

[0095] It should be understood that the functional failure mode is a complete failure of the electronic oil pump performance caused by a serious fault, and the oil pump motor system needs to be reset and restored after the fault disappears.

[0096] In a specific implementation, if a serious fault occurs in self-checking, the functional failure mode is entered.

[0097] Further, the conditions for entering the functional failure mode include at least one of the following:

[0098] The oil pump motor system running environment continuously fails for a preset number of times after the oil pump control system is powered on;

[0099] Current short circuit occurs;

[0100] Voltage is lower than a preset lower limit or voltage is higher than a preset upper limit;

[0101] Motor rotation speed exceeds the highest running rotation speed.

[0102] It should be noted that the entering mechanism of the functional failure mode includes: the system running environment continuously fails for 3 times after power-on, current serious fault (short circuit fault), voltage U lower than the lower limit and higher than the upper limit fault, overspeed, and motor rotation speed exceeding the highest allowable rotation speed nmax.

[0103] Step S40: When no fault is detected, the oil pump control system is controlled to enter a ready mode.

[0104] In a specific implementation, after the self-checking is passed, the ready mode is entered to wait for an external work instruction.

[0105] Step S50: When entering the ready mode, when receiving the operation instruction of the permanent magnet synchronous generator controller, the oil pump control system enters the power output mode.

[0106] In a specific implementation, the oil pump control system enters the power output mode after receiving an external operation instruction.

[0107] As shown in FIG. 4, FIG. 4 is a working mode switching diagram of the electronic oil pump control method according to the first embodiment. The initialization mode is entered first, and then the system self-checking mode is entered. After the self-checking is passed, the ready mode is entered to wait for an external operation instruction. If a general fault occurs in the self-checking, the limp operation mode is entered to ensure the rated power output operation of the generator system. If a serious fault occurs in the self-checking, the function failure mode is entered. If an external operation instruction is received, the oil pump control system enters the power output mode. If a general fault occurs in the power output mode, the power reduction mode is entered. If a serious fault occurs in the power output mode, the function failure mode is entered.

[0108] In this embodiment, the oil pump control system is controlled to enter the system self-checking mode and perform function checking. When a first-level fault is detected, the oil pump control system is controlled to enter the limp mode to enable the oil pump motor system to operate at the rated power output. When a second-level fault is detected, the oil pump control system is controlled to enter the function failure mode to control the oil pump motor system to reset, wherein the second-level fault is higher than the first-level fault. When no fault is detected, the oil pump control system enters the ready mode. When entering the ready mode, when receiving the operation instruction of the permanent magnet synchronous generator controller, the oil pump control system enters the power output mode. The mode switching of the electronic oil pump control system is solved. The fault mode is made to enable the oil pump system to work more efficiently, more safely and more reliably, to serve the energy conversion demand of the oil-cooled generator system of the REV vehicle. The entering and exiting mechanisms of the linear power reduction, limp and function failure modes of the electronic oil pump control system are proposed. The safety operation and protection measures of the oil pump system under general faults and serious faults are solved.

[0109] Referring to FIG. 5, FIG. 5 is a flowchart of the electronic oil pump control method according to the second embodiment.

[0110] Based on the first embodiment, in this embodiment, the step S50 can include:

[0111] Step S501: When entering the power output mode, when the oil pump control system diagnoses a first preset fault, the oil pump control system enters the power reduction mode, and the oil pump motor system performs linear power reduction output according to the current module temperature, stator temperature and current value.

[0112] It should be noted that the linear power reduction mode is a linear power reduction output according to the current module temperature, stator temperature and current value, and is recoverable.

[0113] It should be understood that the first preset fault and the second preset fault herein can be set according to actual conditions, and are also temporarily defined as general faults and serious faults herein.

[0114] In a specific implementation, when a general fault occurs in the power output mode, the power reduction mode is entered.

[0115] Step S502: When the second preset fault is diagnosed by the oil pump control system, the oil pump control system is controlled to enter the function failure mode.

[0116] In a specific implementation, when a serious fault occurs in the power output mode, the function failure mode is entered.

[0117] Further, the conditions for controlling the oil pump control system to enter the power reduction mode include at least one of the following:

[0118] The power module temperature is within a first preset range;

[0119] The motor electronic temperature is within a second preset range;

[0120] The current signal is within a third preset range.

[0121] It should be noted that the entering mechanism of the linear power reduction mode includes that the power module temperature TC is within a linear power reduction operation output range TC1~TC2 (which can be calibrated), the motor stator temperature TM is within a linear power reduction operation output range TM1~TM2 (which can be calibrated), and the current signal I is within a linear power reduction operation output range I1~I2 (which can be calibrated).

[0122] The embodiment controls the oil pump control system to enter the power reduction mode when the first preset fault is diagnosed by the oil pump control system in the power output mode, controls the oil pump motor system to perform linear power reduction output according to the current module temperature, stator temperature and current value, and adopts a software reset mode for recoverable operation in the function failure mode, thereby improving user experience of the generator system in a fault state.

[0123] Referring to FIG. 6, FIG. 6 is a flowchart of a third embodiment of an electronic oil pump control method.

[0124] Based on the above embodiments, in the present embodiment, the step S10 can include:

[0125] Step S101: When the limp-home mode exit condition is met, exit the limp-home mode and re-enter the system self-check mode, wherein the limp-home mode exit condition at least includes the current signal, the position sampling signal, the position sensor, the power module temperature, the motor stator temperature, the communication signal, and the actual rotation speed.

[0126] It should be noted that the exit mechanism of the limp-home mode includes: I≤I2, lasting 500 ms, 0.5V<Vn<4.5V, lasting 500 ms, the phase sequence returns to normal, lasting 500 ms, -40℃<TC<TC2, lasting 500 ms, -40℃<TC<TM2, lasting 500 ms, receiving a frame of correct communication signal, |actual rotation speed-target rotation speed| is greater than or equal to 100 rpm, lasting 500 ms.

[0127] Step S102: When the power reduction mode exit condition is met, exit the power reduction mode and re-enter the power output mode, wherein the power reduction mode exit condition at least includes the current signal, the position sampling signal, the position sensor, the power module temperature, the motor stator temperature, the communication signal, and the actual rotation speed.

[0128] It should be noted that the exit mechanism of the power reduction mode includes: TC≤TC1 lasting 500 ms, TM≤TM1 lasting 500 ms, I≤I1 lasting 500 ms.

[0129] Step S103: When the function failure mode exit condition is met, exit the function failure mode and re-enter the initialization mode, wherein the function failure mode exit condition at least includes the system running environment running success number of times, the current short circuit problem, the voltage, and the motor rotation speed.

[0130] It should be noted that the exit mechanism of the function failure mode includes: the system running environment runs successfully once after resetting, the short circuit fault disappears after resetting, 9V<U<16V after resetting, and the rotation speed is lower than 80% of the highest running rotation speed nmax after resetting.

[0131] The entering and exiting mechanisms of the linear power reduction mode, the limp-home mode, and the function failure mode are shown in Table 1.

[0132]

[0133] Table 1

[0134] The embodiment exits the limp mode, re-enters the system self-check mode when the limp mode exit condition is met, wherein the limp mode exit condition at least includes the current signal, the position sampling signal, the position sensor, the power module temperature, the motor stator temperature, the communication signal and the actual rotating speed judgment, exits the power reduction mode, re-enters the power output mode when the power reduction mode exit condition is met, wherein the power reduction mode exit condition at least includes the current signal, the position sampling signal, the position sensor, the power module temperature, the motor stator temperature, the communication signal and the actual rotating speed judgment, exits the function failure mode, re-enters the initialization mode when the function failure mode exit condition is met, wherein the function failure mode exit condition at least includes the system running environment running success number, the current short circuit problem, the voltage and the motor rotating speed judgment, provides the exit mechanism of the linear power reduction mode, the limp mode and the function failure mode, and the reset recoverable mode of the linear power reduction mode, the limp mode and the function failure mode is the normal running mode.

[0135] In addition, the embodiment of the present application further provides an electronic oil pump control device, which comprises a memory, a processor and an electronic oil pump control program stored in the memory and executable on the processor, and the electronic oil pump control program is configured to implement the steps of the electronic oil pump control method as described above.

[0136] In addition, the embodiment of the present application further provides a storage medium, which stores an electronic oil pump control program, and the electronic oil pump control program implements the steps of the electronic oil pump control method as described above when executed by a processor.

[0137] Referring to FIG. 7, FIG. 7 is a structural block diagram of the electronic oil pump control device according to the first embodiment of the present application.

[0138] As shown in FIG. 7, the electronic oil pump control device according to the embodiment of the present application comprises:

[0139] The self-check module 10 is configured to control the oil pump control system to enter the system self-check mode and perform function checking.

[0140] The first control module 20 is configured to control the oil pump control system to enter the limp mode when the first level fault is detected, so that the oil pump motor system runs at the rated power output.

[0141] The second control module 30 is configured to control the oil pump control system to enter the function failure mode when the second level fault is detected, and control the oil pump motor system to reset, wherein the second level fault is higher than the first level fault.

[0142] The third control module 40 is configured to control the oil pump control system to enter the ready mode when no fault is detected.

[0143] The third control module 40 is further configured to control the oil pump control system to enter a power output mode when receiving a running instruction of the permanent magnet synchronous generator controller in the ready mode.

[0144] It should be understood that the above is only an example, and does not limit the technical solutions of the present application. In specific applications, those skilled in the art can set up as needed, and the present application does not limit this.

[0145] The self-checking module 10 of the embodiment controls the oil pump control system to enter a system self-checking mode and performs a function check; the first control module 20 controls the oil pump control system to enter a limp mode when detecting a first level fault, so that the oil pump motor system runs at a rated power output; the second control module 30 controls the oil pump control system to enter a function failure mode when detecting a second level fault, and controls the oil pump motor system to reset, wherein the second level fault is higher than the first level fault; the third control module 40 controls the oil pump control system to enter a ready mode when no fault is detected; and when receiving a running instruction of the permanent magnet synchronous generator controller in the ready mode, the third control module 40 controls the oil pump control system to enter a power output mode.

[0146] In an embodiment, the self-checking module 10 is further configured to initialize and configure each module of the oil pump control system when the oil pump control system triggers an initialization mode.

[0147] The power output unit of the oil pump motor system is controlled to run at a preset speed for a preset time length.

[0148] In an embodiment, the first control module 20 is further configured to short-circuit or open-circuit a current signal.

[0149] The position sampling signal is short-circuited or open-circuited.

[0150] The position sensor has an abnormal phase sequence or a missing phase.

[0151] The temperature of the power module is greater than a first preset temperature or less than a second preset temperature.

[0152] The temperature of the motor stator is greater than a third preset temperature or less than a fourth preset temperature.

[0153] The communication bus is turned off or the received instruction signal is incorrect.

[0154] The actual rotating speed is less than a preset rotating speed.

[0155] In an embodiment, the second control module 30 is further configured to continuously fail the running environment of the oil pump motor system for a preset number of times after the oil pump control system is powered on.

[0156] The current is short-circuited.

[0157] a voltage is lower than a preset lower limit or a voltage is higher than a preset upper limit;

[0158] a motor speed exceeds a maximum operating speed.

[0159] In an embodiment, the third control module 40 is further configured to, when the oil pump control system diagnoses a first preset fault in the power output mode, control the oil pump control system to enter a power reduction mode, and control the oil pump motor system to perform linear power reduction output according to a current module temperature, a stator temperature and a current value.

[0160] When the oil pump control system diagnoses a second preset fault, control the oil pump control system to enter a function failure mode.

[0161] In an embodiment, the third control module 40 is further configured to, when the power module temperature is within a first preset range.

[0162] When the motor electronic temperature is within a second preset range.

[0163] When the current signal is within a third preset range.

[0164] In an embodiment, the third control module 40 is further configured to, when a limp mode exit condition is met, exit the limp mode and re-enter a system self-check mode, wherein the limp mode exit condition at least includes a judgment of a current signal, a position sampling signal, a position sensor, a power module temperature, a motor stator temperature, a communication signal and an actual speed.

[0165] When a power reduction mode exit condition is met, exit the power reduction mode and re-enter the power output mode, wherein the power reduction mode exit condition at least includes a judgment of a current signal, a position sampling signal, a position sensor, a power module temperature, a motor stator temperature, a communication signal and an actual speed.

[0166] When a function failure mode exit condition is met, exit the function failure mode and re-enter an initialization mode, wherein the function failure mode exit condition at least includes a judgment of a system operating environment running success number, a current short circuit problem, a voltage and a motor speed.

[0167] Other embodiments or specific implementations of the electronic oil pump control device can refer to the above-mentioned method embodiments, which will not be described here.

[0168] It should be noted that, in this document, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises a" does not, without more constraints, exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0169] The above-mentioned sequence numbers of the embodiments of the present application are only for description, and do not represent advantages or disadvantages of the embodiments.

[0170] From the above description of the embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be realized by means of software and a general hardware platform, and of course, can also be realized by hardware, but in many cases, the former is a better embodiment. Based on such understanding, the technical solutions of the present application can be embodied in the form of a software product, and the computer software product is stored in a storage medium (such as a read-only memory / random access memory, a magnetic disk, or an optical disk), and includes a plurality of instructions for causing an end device (which can be a mobile phone, a computer, a server, or a network device) to execute the methods described in the embodiments of the present application.

[0171] The above is only an embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A method for controlling an electronic oil pump, wherein: The method is applied to an oil pump system, which includes an oil pump control system and an oil pump motor system. The electronic oil pump control method includes the following steps: Control the oil pump control system to enter the system self-check mode and perform a function check; When a first level fault is detected, controlling the oil pump control system to enter a limp home mode so that the oil pump motor system operates at a rated power output; When a second-level fault is detected, the oil pump control system is controlled to enter a functional failure mode, and the oil pump motor system is controlled to reset, wherein the second-level fault is higher than the first-level fault; When no fault is detected, controlling the oil pump control system to enter a ready mode; In the ready mode, when an operation instruction is received from the permanent magnet synchronous generator controller, the oil pump control system is controlled to enter the power output mode.

2. The electronic oil pump control method according to claim 1, wherein: Before the oil pump control system enters the system self-check mode, the method further includes: When the oil pump control system triggers the initialization mode, initialization configuration is performed on each module of the oil pump control system; The power output unit of the oil pump motor system is controlled to operate at a preset speed for a preset time period.

3. The electronic oil pump control method according to claim 1, wherein: After controlling the oil pump control system to enter the power output mode, the method further includes: When entering the power output mode, when the oil pump control system diagnoses a first preset fault, the oil pump control system is controlled to enter the power reduction mode, and the oil pump motor system is controlled to linearly reduce power output according to the current module temperature, stator temperature, and current value; When the oil pump control system diagnoses a second predetermined fault, the oil pump control system is controlled to enter a functional failure mode.

4. The electronic oil pump control method according to claim 3, wherein: The condition for controlling the oil pump control system to enter the power reduction mode includes at least one of the following: The power module temperature is within a first preset range; The motor electronic temperature is within a second preset range; The current signal is within a third preset interval.

5. The electronic oil pump control method according to claim 1, wherein: The conditions for entering the limp mode include at least one of the following: The current signal sampling is short-circuited or open-circuited; The position sampling signal is short-circuited or open-circuited; The phase sequence of the position sensor is abnormal or missing; The power module temperature is greater than the first preset temperature or less than the second preset temperature; The motor stator temperature is greater than the third preset temperature or less than the fourth preset temperature; The communication bus is shut down or the received command signal is wrong; The actual speed is lower than the preset speed.

6. The electronic oil pump control method according to claim 1, wherein: The conditions for entering the functional failure mode include at least one of the following: When the oil pump control system is powered on, the oil pump motor system operating environment fails for a preset number of consecutive times; There is a short circuit in the current; The voltage is lower than the preset lower limit or the voltage is higher than the preset upper limit; The motor speed exceeds the maximum operating speed.

7. The electronic oil pump control method according to claim 1, wherein: The method further comprises: When a limp home mode exit condition is met, the system exits the trudging mode and re-enters the system self-test mode, wherein the limp home mode exit condition at least includes a current signal, a position sampling signal, a position sensor, a power module temperature, a motor stator temperature, a communication signal, and a judgment of an actual speed; When the power reduction mode exit condition is met, the power reduction mode is exited and the power output mode is re-entered, wherein the power reduction mode exit condition at least includes the judgment of the current signal, the position sampling signal, the position sensor, the power module temperature, the motor stator temperature, the communication signal and the actual speed; When the functional failure mode exit condition is met, the functional failure mode is exited and the initialization mode is re-entered, wherein the functional failure mode exit condition at least includes the number of successful operations of the system operating environment, current short circuit problem, voltage and motor speed judgment.

8. An electronic oil pump control device, wherein: The device comprises: Self-check module, used to control the oil pump control system to enter the system self-check mode and perform functional checks; a first control module, configured to control the oil pump control system to enter a limp home mode when a first level fault is detected, so that the oil pump motor system operates at a rated power output; a second control module, configured to control the oil pump control system to enter a functional failure mode and control the oil pump motor system to reset when a second-level fault is detected, wherein the second-level fault is higher than the first-level fault; a third control module, configured to control the oil pump control system to enter a ready mode when no fault is detected; In the ready mode, when an operation instruction is received from the permanent magnet synchronous generator controller, the oil pump control system is controlled to enter the power output mode.

9. An electronic oil pump control device, wherein: The device includes: a memory, a processor, and an electronic oil pump control program stored in the memory and executable on the processor, wherein the electronic oil pump control program is configured to implement the steps of the electronic oil pump control method according to any one of claims 1 to 7.

10. A storage medium, wherein: The storage medium stores an electronic oil pump control program, which, when executed by the processor, implements the steps of the electronic oil pump control method according to any one of claims 1 to 7.

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