Electronic oil pump and reverse fault detection method and device thereof and readable storage medium

Abstract

The application discloses an electronic oil pump and a reverse fault detection method and device thereof and a readable storage medium. The method comprises the following steps: acquiring an arbitrary phase current of an oil pump motor, and determining two other phase currents of the oil pump motor at a first position angle and a second position angle according to the arbitrary phase current; determining a current operation mode of the oil pump motor according to the two other phase currents of the oil pump motor at the first position angle and the second position angle; and performing mode matching detection on the current operation mode to determine whether the oil pump motor has a reverse fault. The method determines the current operation mode of the oil pump motor based on the two other phase currents of the oil pump motor at the first position angle and the second position angle, thereby determining whether the electronic oil pump has a reverse fault, and the real-time online monitoring of the reverse fault of the electronic oil pump can be realized without increasing the application cost of the electronic oil pump, and the operation reliability and safety of the electronic oil pump are improved.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and in particular to a method for detecting reverse faults in an electronic fuel pump, a computer-readable storage medium, an electronic fuel pump, a vehicle, and an electronic fuel pump reverse fault detection device. Background Technology

[0002] The primary function of the electronic oil pump in new energy vehicles is lubrication and cooling, using lubricating oil as the medium. In electronic oil pump systems, because the inlet and outlet positions are fixed, and some systems also incorporate single-phase valve assemblies, the pump motor's rotation direction is limited to a single, required forward direction. If the pump motor runs in reverse, the electronic oil pump system may stop pumping oil, turning the suction tank into an discharge state. Furthermore, due to the difference in diameter between the suction and outlet ports, oil trapping may occur. Additionally, prolonged reverse operation of the pump motor can damage mechanical components, harming the pump structure, motor, and controller, and in severe cases, leading to system failure. Summary of the Invention

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. Therefore, the first objective of this invention is to propose a fault detection method for an electronic oil pump. Based on the current of the other two phases of the oil pump motor at a first position angle and a second position angle, the current operating mode of the motor is determined, thereby determining whether the electronic oil pump has experienced a reverse rotation fault. Without increasing the application cost of the electronic oil pump, real-time online monitoring of reverse rotation faults in the electronic oil pump can be achieved, improving the operational reliability and safety of the electronic oil pump.

[0004] A second objective of this invention is to provide a computer-readable storage medium.

[0005] The third objective of this invention is to provide an electronic oil pump.

[0006] The fourth objective of this invention is to provide a vehicle.

[0007] The fifth objective of this invention is to provide an electronic oil pump reverse fault detection device.

[0008] To achieve the above objectives, a first aspect of the present invention provides a method for detecting reverse rotation faults in an electronic oil pump, comprising: acquiring the current of any one phase of the oil pump motor, and determining the current of the other two phases of the oil pump motor at a first position angle and a second position angle based on the current of the arbitrary phase; determining the current operating mode of the oil pump motor based on the current of the other two phases of the oil pump motor at the first position angle and the second position angle; and performing mode matching detection on the current operating mode to determine whether the oil pump motor has experienced a reverse rotation fault.

[0009] According to an embodiment of the present invention, the method for detecting reverse rotation faults in an electronic oil pump firstly acquires the current of any one phase of the oil pump motor, and determines the currents of the other two phases of the oil pump motor at a first position angle and a second position angle based on the current of the arbitrary phase. Then, it determines the current operating mode of the oil pump motor based on the currents of the other two phases at the first and second position angles. Finally, it performs mode matching detection on the current operating mode to determine whether a reverse rotation fault has occurred in the oil pump motor. Thus, this method determines the current operating mode of the motor based on the currents of the other two phases at the first and second position angles, thereby determining whether a reverse rotation fault has occurred in the electronic oil pump. Without increasing the application cost of the electronic oil pump, it can achieve real-time online monitoring of reverse rotation faults in electronic oil pumps, improving the operational reliability and safety of the electronic oil pump.

[0010] In addition, the electronic oil pump reverse rotation fault detection method according to the above embodiments of the present invention may also have the following additional technical features:

[0011] According to one embodiment of the present invention, determining the other two phase currents of the oil pump motor at the first position angle and the second position angle based on the arbitrary phase current includes: determining the motor position angle at the target amplitude time of the arbitrary phase current, determining the first position angle and the second position angle based on the motor position angle, and determining the other two phase currents of the oil pump motor at the first position angle and the second position angle.

[0012] According to one embodiment of the present invention, determining a first position angle and a second position angle based on a motor position angle includes: superimposing a first preset angle on the motor position angle to obtain a first position angle, and superimposing a second preset angle on the motor position angle to obtain a second position angle, wherein the second preset angle is greater than the first preset angle.

[0013] According to one embodiment of the present invention, the first preset angle is 60° and the second preset angle is 120°.

[0014] According to one embodiment of the present invention, the target amplitude time is the time when the current of any one phase is at its maximum.

[0015] According to one embodiment of the present invention, determining the current operating mode of the oil pump motor based on the other two phase currents of the oil pump motor at a first position angle and a second position angle includes: determining the absolute values ​​of the other two phase currents of the oil pump motor at the first position angle, which are a first current absolute value and a second current absolute value, and determining the absolute values ​​of the other two phase currents of the oil pump motor at the second position angle, which are a third current absolute value and a fourth current absolute value; and determining the current operating mode of the oil pump motor based on the relationship between the first current absolute value and the second current absolute value, and the relationship between the third current absolute value and the fourth current absolute value.

[0016] According to one embodiment of the present invention, the current operating mode includes any one of UVW mode, UWV mode, VWU mode, VUW mode, WUV mode and WVU mode.

[0017] According to one embodiment of the present invention, a mode matching detection is performed on the current operating mode, including: obtaining a pre-configured standard operating mode of the oil pump motor; and determining that the oil pump motor has reversed when the current operating mode does not match the standard operating mode of the oil pump motor.

[0018] To achieve the above objectives, a second aspect of the present invention provides a computer-readable storage medium storing an electronic oil pump reversal fault detection program thereon, which, when executed by a processor, implements the above-described electronic oil pump reversal fault detection method.

[0019] According to the computer-readable storage medium of the present invention, based on the above-described method for detecting reverse rotation faults of electronic oil pumps, real-time online monitoring of reverse rotation faults of electronic oil pumps can be achieved without increasing the application cost of electronic oil pumps, thereby improving the operational reliability and safety of electronic oil pumps.

[0020] To achieve the above objectives, a third aspect of the present invention provides an electronic oil pump, including a memory, a processor, and an electronic oil pump reversal fault detection program stored in the memory and executable on the processor. When the processor executes the electronic oil pump reversal fault detection program, the above-mentioned electronic oil pump reversal fault detection method is implemented.

[0021] According to the embodiments of the present invention, the electronic oil pump based on the above-described method for detecting reverse rotation faults of the electronic oil pump can achieve real-time online monitoring of reverse rotation faults of the electronic oil pump without increasing the application cost of the electronic oil pump, thereby improving the operational reliability and safety of the electronic oil pump.

[0022] To achieve the above objectives, a fourth aspect of the present invention provides a vehicle including the aforementioned electronic oil pump.

[0023] According to the vehicle of the present invention, based on the above-mentioned electronic oil pump, real-time online monitoring of electronic oil pump reversal faults can be achieved without increasing the application cost of electronic oil pump, thereby improving the operational reliability and safety of electronic oil pump and avoiding the damage to the oil pump system and the whole vehicle caused by the electronic oil pump in reversal state.

[0024] To achieve the above objectives, a fifth aspect of the present invention provides an electronic oil pump reversal fault detection device, comprising: an acquisition module for acquiring any one phase current of an oil pump motor and determining the other two phase currents of the oil pump motor at a first position angle and a second position angle based on the arbitrary phase current; a determination module for determining the current operating mode of the oil pump motor based on the other two phase currents of the oil pump motor at the first position angle and the second position angle; and a fault detection module for performing mode matching detection on the current operating mode to determine whether the oil pump motor has experienced a reversal fault.

[0025] According to an embodiment of the present invention, the electronic oil pump reversal fault detection device acquires the current of any one phase of the oil pump motor through an acquisition module, and determines the currents of the other two phases of the oil pump motor at a first position angle and a second position angle based on the arbitrary phase current. The determination module determines the current operating mode of the oil pump motor based on the other two phase currents at the first and second position angles. The fault detection module performs mode matching detection on the current operating mode to determine whether the oil pump motor has experienced a reversal fault. Therefore, this device determines the current operating mode of the motor based on the other two phase currents at the first and second position angles, thereby determining whether the electronic oil pump has experienced a reversal fault. Without increasing the application cost of the electronic oil pump, it can achieve real-time online monitoring of electronic oil pump reversal faults, improving the operational reliability and safety of the electronic oil pump.

[0026] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0027] Figure 1 This is a flowchart of an electronic oil pump reverse rotation fault detection method according to an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of three-phase current waveforms in UVW mode according to an embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of three-phase current waveforms in UWV mode according to an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of three-phase current waveforms in VWU mode according to an embodiment of the present invention;

[0031] Figure 5 This is a schematic diagram of three-phase current waveforms in VUW mode according to an embodiment of the present invention;

[0032] Figure 6 This is a schematic diagram of three-phase current waveforms in WUV mode according to an embodiment of the present invention;

[0033] Figure 7 This is a schematic diagram of three-phase current waveforms in WVU mode according to an embodiment of the present invention;

[0034] Figure 8 A flowchart of an electronic oil pump reverse rotation fault detection method according to a specific embodiment of the present invention;

[0035] Figure 9 This is a block diagram of an electronic oil pump according to an embodiment of the present invention;

[0036] Figure 10 A schematic block diagram of a vehicle according to an embodiment of the present invention;

[0037] Figure 11 This is a block diagram of an electronic oil pump reverse fault detection device according to an embodiment of the present invention. Detailed Implementation

[0038] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0039] The following description, with reference to the accompanying drawings, outlines an electronic oil pump reversal fault detection method, a computer-readable storage medium, an electronic oil pump, a vehicle, and an electronic oil pump reversal fault detection device according to embodiments of the present invention.

[0040] Figure 1 This is a flowchart of an electronic oil pump reverse fault detection method according to an embodiment of the present invention.

[0041] like Figure 1 As shown, the electronic oil pump reverse rotation fault detection method of this invention may include:

[0042] S1, obtain the current of any one phase of the oil pump motor, and determine the other two phase currents of the oil pump motor at the first position angle and the second position angle based on the current of any one phase.

[0043] S2, determine the current operating mode of the oil pump motor based on the other two phase currents of the oil pump motor at the first position angle and the second position angle;

[0044] S3 performs a pattern matching test on the current operating mode to determine whether the oil pump motor has experienced a reverse rotation fault.

[0045] Specifically, the three-phase currents of the oil pump motor are U-phase, V-phase, and W-phase currents. During the driving process of the oil pump motor, the three-phase currents are symmetrical, with a phase difference of 120°. The phase sequence of the three-phase currents differs under different operating modes, and the motor's running direction can be adjusted based on the changes in the phase sequence. For example, assuming the forward rotation phase sequence of the motor is UVW mode, then UWV mode can control the motor to achieve reverse rotation. The following explanation uses the U-phase current as an example to illustrate the method for detecting reverse rotation faults in an electronic oil pump.

[0046] During the operation of the electronic oil pump, the U-phase current of the pump motor is acquired. Then, using the U-phase current as a reference, the current values ​​of the V-phase and W-phase currents at the first and second position angles are determined. Based on these values, the current operating mode of the pump motor is determined. This current operating mode is then compared with a pre-calibrated operating mode to determine if a reverse rotation fault exists. Therefore, this embodiment uses the three-phase current values ​​to determine the phase sequence of the three-phase currents, thus representing the current operating mode of the pump motor. The matching degree between the current operating mode and the pre-calibrated operating mode is used to determine whether a reverse rotation fault has occurred in the electronic oil pump.

[0047] In one embodiment of the present invention, a mode matching detection is performed on the current operating mode, including: obtaining a pre-configured standard operating mode of the oil pump motor; and determining that the oil pump motor has reversed when the current operating mode does not match the standard operating mode of the oil pump motor.

[0048] In other words, the pre-configured standard operating mode of the oil pump motor is first determined as the evaluation standard for subsequent reverse operation. During the operation of the electronic oil pump, the current operating mode of the oil pump motor, determined based on the three-phase current, is compared with the standard operating mode. If the current operating mode matches the pre-configured standard operating mode, the electronic oil pump is determined to have no reverse operation fault, and the oil pump motor is controlled to operate normally. If the current operating mode does not match the pre-configured standard operating mode, a reverse operation fault is determined, and corresponding protection strategies can be implemented based on the fault information, or the relevant control unit can be notified to implement corresponding protection strategies.

[0049] It should be noted that the phase sequence of the three-phase currents mentioned above can be determined not only based on the current values ​​of the three-phase currents during the operation of the oil pump motor, but also based on the voltage values; no restriction is imposed here. Furthermore, any one of the aforementioned phase currents can be used to determine the detection reference position, thereby determining the first position angle and the second position angle. Then, by continuing to observe the current phase sequence change pattern, the current operating state of the oil pump motor can be determined.

[0050] According to one embodiment of the present invention, determining the other two phase currents of the oil pump motor at a first position angle and a second position angle based on the current of any one phase includes: determining the motor position angle at a target amplitude time for the current of any one phase, determining the first position angle and the second position angle based on the motor position angle, and determining the other two phase currents of the oil pump motor at the first position angle and the second position angle. The target amplitude time is the time of maximum amplitude of the current of any one phase, which can be specifically set according to actual conditions.

[0051] Specifically, taking any one phase current as the U-phase current and the target amplitude time as the maximum amplitude time of the U-phase current as an example, when the U-phase current is determined to be at the maximum amplitude time based on current acquisition, the motor position angle corresponding to the maximum amplitude time is obtained, and the first position angle and the second position angle are calculated accordingly. The V-phase current and W-phase current values ​​at the first position angle and the second position angle are obtained through current acquisition.

[0052] It is understandable that the relationship between the first position angle, the second position angle, and the motor position angle at the target amplitude time can be preset. Then, when determining the motor position angle at the target amplitude time of the U-phase current, the first position angle and the second position angle can be obtained by preset relationship. Under the premise that the current operating mode of the oil pump motor can be determined based on the other two phase currents of the oil pump motor at the first position angle and the second position angle, the specific settings can be made according to the actual situation.

[0053] According to one embodiment of the present invention, determining a first position angle and a second position angle based on a motor position angle includes: superimposing a first preset angle on the motor position angle to obtain a first position angle, and superimposing a second preset angle on the motor position angle to obtain a second position angle, wherein the second preset angle is greater than the first preset angle. Specifically, the first preset angle is 60°, and the second preset angle is 120°.

[0054] In other words, when the motor position angle at the target amplitude time of the U-phase current is determined to be theta0, the first position angle is calculated to be theta0+60° and the second position angle is theta0+120°. Then, the V-phase current and W-phase current at the motor position angle of theta0+60° and the V-phase current and W-phase current at the motor position angle of theta0+120° are obtained respectively, and the current operating mode of the oil pump motor is determined accordingly.

[0055] According to one embodiment of the present invention, determining the current operating mode of the oil pump motor based on the other two phase currents of the oil pump motor at a first position angle and a second position angle includes: determining the absolute values ​​of the other two phase currents of the oil pump motor at the first position angle, which are a first current absolute value and a second current absolute value, and determining the absolute values ​​of the other two phase currents of the oil pump motor at the second position angle, which are a third current absolute value and a fourth current absolute value; and determining the current operating mode of the oil pump motor based on the relationship between the first current absolute value and the second current absolute value, and the relationship between the third current absolute value and the fourth current absolute value.

[0056] According to one embodiment of the present invention, the current operating mode includes any one of UVW mode, UWV mode, VWU mode, VUW mode, WUV mode and WVU mode.

[0057] The following example illustrates the method for determining whether the current operating mode of the oil pump motor is UVW or UWV. In this embodiment, any one phase current is the U-phase current of the oil pump motor. During fault detection, the U-phase current of the oil pump motor is first acquired. Then, the motor position angle at the moment when the U-phase current reaches its maximum amplitude is taken as the initial position angle. The initial position angle plus 60° is taken as the first position angle, and the initial position angle plus 120° is taken as the second position angle. Specifically, the U-phase current is acquired, and the maximum amplitude of the U-phase current is determined as t0. The motor position angle theta0 at the current t0 is read. At the motor position angle theta0+60°, the V-phase and W-phase currents, namely the first V-phase current Iv1 and the first W-phase current Iw1, are read and recorded. At the motor position angle theta0+120°, the V-phase and W-phase currents, namely the second V-phase current Iv2 and the second W-phase current Iw2, are read and recorded. Then, the current operating mode of the oil pump motor is determined based on the absolute values ​​of the first V-phase current Iv1, the first W-phase current Iw1, the second V-phase current Iv2, and the second W-phase current Iw2.

[0058] Reference Figure 2 , Figure 3 As shown, t0 represents the moment of maximum amplitude of the U-phase current, corresponding to the motor position angle theta0; t1 represents the moment corresponding to the first position angle, theta0 + 60°; and t2 represents the moment corresponding to the second position angle, theta0 + 120°. When the oil pump motor operates in UVW mode, its three-phase current waveforms are as follows: Figure 2 As shown, at time t1, the W-phase current reaches a negative peak, and the absolute value of the first V-phase current MIv1 is less than the absolute value of the first W-phase current MIw1. At time t2, the V-phase current reaches a positive peak, and the absolute value of the second V-phase current MIv2 is greater than the absolute value of the second W-phase current MIw2. When the oil pump motor operates in UVW mode, its three-phase current waveforms are as follows. Figure 3 As shown, at time t1, the V-phase current reaches the negative peak value, and the absolute value MIv1 of the first V-phase current is greater than the absolute value MIw1 of the first W-phase current. At time t2, the W-phase current reaches the positive peak value, and the absolute value MIv2 of the second V-phase current is less than the absolute value MIw2 of the second W-phase current. Here, the absolute value MIv1 of the first V-phase current is the first current absolute value, the absolute value MIw1 of the first W-phase current is the second current absolute value, the absolute value MIv2 of the second V-phase current is the third current absolute value, and the absolute value MIw2 of the second W-phase current is the fourth current absolute value.

[0059] Based on the above, during the judgment of the current operation mode of the oil pump motor, take the absolute values of the above-mentioned first V-phase current Iv1, first W-phase current Iw1, second V-phase current Iv2, and second W-phase current Iw2 to obtain the first current absolute value MIv1, second current absolute value MIw1, third current absolute value MIv2, and fourth current absolute value MIw2. When it is judged that MIv1 < MIw1 and MIv2 > MIw2, it is determined that the current operation mode of the oil pump motor is the UVW mode. When it is judged that MIv1 > MIw1 and MIv2 < MIw2, it is determined that the current operation mode of the oil pump motor is the UWV mode.

[0060] The following gives an example of the method for determining that the current operation mode of the oil pump motor is the VWU mode or the VUW mode.

[0061] In this embodiment, the motor position angle at the maximum amplitude moment of the V-phase current is used as the initial position angle. During the detection process, take the maximum amplitude moment of the V-phase current as t0, read the current motor position angle theta0 at time t0, at the motor position angle theta0 + 60°, read and record the first W-phase current Iw1 and the first U-phase current Iu1, and at the motor position angle theta0 + 120°, read and record the second W-phase current Iw2 and the second U-phase current Iu2. At this time, determine whether the current operation mode of the oil pump motor is the VWU mode or the VUW mode according to the absolute values of the first W-phase current Iw1, first U-phase current Iu1, second W-phase current Iw2, and second U-phase current Iu2.

[0062] Refer to Figure 4 、 Figure 5 As shown, t0 is the maximum amplitude moment of the V-phase current, that is, the corresponding moment of the motor position angle theta0, t1 is the corresponding moment of the motor position angle theta0 + 60°, and t2 is the corresponding moment of the motor position angle theta0 + 120°. When the operation mode of the oil pump motor is VWU, the waveform diagram of its three-phase current is as Figure 4As shown, at time t1, the current of phase U reaches the negative peak value, and the absolute value MIw1 of the first current of phase W is less than the absolute value MIu1 of the first current of phase U. At time t2, the current of phase W reaches the positive peak value, and the absolute value MIw2 of the second current of phase W is greater than the absolute value MIu2 of the second current of phase U. When the operation mode of the oil pump motor is VUW, the waveform diagram of its three-phase current is as Figure 5 As shown, at time t1, the current of phase W reaches the negative peak value, and the absolute value MIw1 of the first current of phase W is greater than the absolute value MIu1 of the first current of phase U. At time t2, the current of phase W reaches the positive peak value, and the absolute value MIw2 of the second current of phase W is less than the absolute value MIu2 of the second current of phase U. Among them, the absolute value MIw1 of the first current of phase W is the first current absolute value, the absolute value MIu1 of the first current of phase U is the second current absolute value, the absolute value MIw2 of the second current of phase W is the third current absolute value, and the absolute value MIu2 of the second current of phase U is the fourth current absolute value.

[0063] Therefore, in the process of determining the current operation mode of the oil pump motor, take the absolute values of the above-mentioned first current Iv1 of phase V, first current Iw1 of phase W, second current Iv2 of phase V, and second current Iw2 of phase W to obtain MIv1, MIw1, MIv2, and MIw2. When it is judged that MIw1 < MIu1 and MIw2 > MIu2, it is determined that the current operation mode of the oil pump motor is the VWU mode. When it is judged that MIw1 > MIu1 and MIw2 < MIu2, it is determined that the current operation mode of the oil pump motor is the VUW mode.

[0064] The following gives examples to illustrate the methods for determining the current operation modes of the oil pump motor as the WUV mode and the WVU mode.

[0065] Specifically, in this embodiment, the motor position angle at the moment when the current of phase W reaches the maximum amplitude value is used as the initial position angle. During the detection process, obtain the current of phase W, determine that the moment when the current of phase W reaches the maximum amplitude value is t0, read the motor position angle theta0 at the current moment t0, at the moment of the motor position angle theta0 + 60°, read and record the first current Iu1 of phase U and the first current Iv1 of phase V, at the moment of the motor position angle theta0 + 120°, read and record the second current Iu2 of phase U and the second current Iv2 of phase V, and determine the current operation mode of the oil pump motor according to the absolute values of the first current Iu1 of phase U, the first current Iv1 of phase V, the second current Iu2 of phase U, and the second current Iv2 of phase V.

[0066] Refer to Figure 6 、 Figure 7As shown, t0 is the moment of the maximum amplitude of the W-phase current, that is, the moment corresponding to the motor position angle theta0, t1 is the moment corresponding to the motor position angle theta0 + 60°, and t2 is the moment corresponding to the motor position angle theta0 + 120°. When the current operating mode of the oil pump motor is WUV, the waveform diagram of its three-phase current is as Figure 6 shown. At the moment t1, the V-phase current reaches the negative peak value, and the absolute value MIu1 of the first U-phase current is less than the absolute value MIv1 of the first V-phase current. At the moment t2, the U-phase current reaches the positive peak value, and the absolute value MIu2 of the second U-phase current is greater than the absolute value MIv2 of the second V-phase current. When the operating mode of the oil pump motor is WVU, the waveform diagram of its three-phase current is as Figure 7 shown. At the moment t1, the U-phase current reaches the negative peak value, and the absolute value MIu1 of the first U-phase current is less than the absolute value MIv1 of the first V-phase current. At the moment t2, the V-phase current reaches the positive peak value, and the absolute value MIu2 of the second U-phase current is less than the absolute value MIv2 of the second V-phase current. Among them, the absolute value MIu1 of the first U-phase current is the first current absolute value, the absolute value MIv1 of the first V-phase current is the second current absolute value, the absolute value MIu2 of the second U-phase current is the third current absolute value, and the absolute value MIv2 of the second V-phase current is the fourth current absolute value.

[0067] Therefore, in the process of determining the current operating mode of the oil pump motor, the absolute values of the above-mentioned first V-phase current Iv1, first W-phase current Iw1, second V-phase current Iv2, and second W-phase current Iw2 are taken to obtain MIv1, MIw1, MIv2, and MIw2. When it is judged that MIu1 < MIv1 and MIu2 > MIv2, it is determined that the current operating mode of the oil pump motor is the WUV mode. When it is judged that MIu1 > MIv1 and MIu2 < MIv2, it is determined that the current operating mode of the oil pump motor is the WVU mode.

[0068] As a specific embodiment of the present invention, any one-phase current is the U-phase current of the oil pump motor, and the method for detecting the reverse rotation fault of the electronic oil pump is as Figure 8 shown, and may include the following steps:

[0069] S101, obtain the U-phase current of the oil pump motor.

[0070] S102, judge whether the U-phase current is at the moment of the maximum amplitude. If so, execute step S103; if not, execute step S102.

[0071] S103, determine the motor position angle theta0 at the moment of the maximum amplitude of the U-phase current.

[0072] S104, determine whether the current motor position angle signal is equal to theta0+60°. If yes, proceed to step S105; otherwise, proceed to step S104.

[0073] S105, read and record the V-phase current Iv1 and the W-phase current Iw1.

[0074] S106, determine whether the current motor position angle signal is equal to theta0+120°. If yes, proceed to step S107; otherwise, proceed to step S106.

[0075] S107, read and record the V-phase current Iv2 and the W-phase current Iw2.

[0076] S108, take the absolute values ​​of Iv1, Iw1, Iv2, and Iw2 to obtain MIv1, MIw1, MIv2, and MIw2.

[0077] S109, determine whether MIv1 is less than MIw1 and MIv2 is greater than MIw2. If yes, proceed to step S110; otherwise, proceed to step S111.

[0078] S110, confirm that the current operating mode of the oil pump motor is UVW mode. Proceed to step S113.

[0079] S111, determine whether MIv1 is greater than MIw1 and MIv2 is less than MIw2. If yes, proceed to step S112; otherwise, proceed to step S101.

[0080] S112, Determine the current operating mode of the oil pump motor as UWV mode.

[0081] S113, Determine whether the current operating mode matches the pre-configured standard operating mode of the oil pump motor. If yes, proceed to step S114. If no, proceed to step S115.

[0082] S114, confirming that the oil pump motor has not experienced a reverse rotation fault.

[0083] S115 indicates that the oil pump motor has reversed direction.

[0084] In summary, the electronic oil pump reversal fault detection method according to embodiments of the present invention first acquires the current of any one phase of the oil pump motor, and determines the currents of the other two phases of the oil pump motor at the first and second position angles based on the current of the arbitrary phase. Then, it determines the current operating mode of the oil pump motor based on the currents of the other two phases at the first and second position angles. Finally, it performs mode matching detection on the current operating mode to determine whether the oil pump motor has experienced a reversal fault. Therefore, this method determines the current operating mode of the motor based on the currents of the other two phases at the first and second position angles, thereby determining whether the electronic oil pump has experienced a reversal fault. Without increasing the application cost of the electronic oil pump, it can achieve real-time online monitoring of electronic oil pump reversal faults, improving the operational reliability and safety of the electronic oil pump.

[0085] Corresponding to the above embodiments, the present invention also proposes a computer-readable storage medium.

[0086] The computer-readable storage medium of this invention stores an electronic oil pump reversal fault detection program thereon, which, when executed by a processor, implements the above-described electronic oil pump reversal fault detection method.

[0087] According to the computer-readable storage medium of the present invention, based on the above-described method for detecting reverse rotation faults of electronic oil pumps, real-time online monitoring of reverse rotation faults of electronic oil pumps can be achieved without increasing the application cost of electronic oil pumps, thereby improving the reliability and safety of electronic oil pump systems.

[0088] Corresponding to the above embodiments, the present invention also proposes an electronic oil pump.

[0089] like Figure 9 As shown, the electronic oil pump 100 of this embodiment includes a memory 110, a processor 120, and an electronic oil pump reversal fault detection program stored in the memory 110 and executable on the processor 120. When the processor 120 executes the electronic oil pump reversal fault detection program, it implements the above-mentioned electronic oil pump reversal fault detection method.

[0090] According to the embodiments of the present invention, the electronic oil pump based on the above-described method for detecting reverse rotation faults of the electronic oil pump can achieve real-time online monitoring of reverse rotation faults of the electronic oil pump without increasing the application cost of the electronic oil pump, thereby improving the reliability and safety of the electronic oil pump system.

[0091] Corresponding to the above embodiments, the present invention also proposes a vehicle.

[0092] like Figure 10 As shown, the vehicle 200 of this embodiment includes the above-described electronic oil pump 100.

[0093] According to the vehicle of the present invention, based on the above-mentioned electronic oil pump, real-time online monitoring of electronic oil pump reversal faults can be achieved without increasing the application cost of electronic oil pump, thereby improving the operational reliability and safety of electronic oil pump and avoiding the damage to the oil pump system and the whole vehicle caused by the electronic oil pump in reversal state.

[0094] Corresponding to the above embodiments, the present invention also proposes an electronic oil pump reverse fault detection device.

[0095] like Figure 11 As shown, the electronic oil pump reverse fault detection device of this embodiment may include: an acquisition module 10, a determination module 20 and a fault detection module 30.

[0096] The acquisition module 10 acquires the current of any one phase of the oil pump motor and determines the currents of the other two phases of the oil pump motor at the first and second position angles based on the current of the arbitrary phase. The determination module 20 determines the current operating mode of the oil pump motor based on the currents of the other two phases at the first and second position angles. The fault detection module 30 performs mode matching detection on the current operating mode to determine whether the oil pump motor has experienced a reverse rotation fault.

[0097] According to one embodiment of the present invention, the acquisition module 10 determines the other two phase currents of the oil pump motor at the first position angle and the second position angle based on the arbitrary phase current. Specifically, it is used to: determine the motor position angle at the target amplitude time of the arbitrary phase current, and determine the first position angle and the second position angle based on the motor position angle, and determine the other two phase currents of the oil pump motor at the first position angle and the second position angle.

[0098] According to an embodiment of the present invention, the acquisition module 10 determines a first position angle and a second position angle based on the motor position angle, specifically for: superimposing a first preset angle on the motor position angle to obtain a first position angle, and superimposing a second preset angle on the motor position angle to obtain a second position angle, wherein the second preset angle is greater than the first preset angle.

[0099] According to one embodiment of the present invention, the first preset angle is 60° and the second preset angle is 120°.

[0100] According to one embodiment of the present invention, the target amplitude time is the time when the current of any one phase is at its maximum.

[0101] According to one embodiment of the present invention, the determining module 20 determines the current operating mode of the oil pump motor based on the other two phase currents of the oil pump motor at the first position angle and the second position angle. Specifically, it is used to: determine the absolute values ​​of the other two phase currents of the oil pump motor at the first position angle, which are the first current absolute value and the second current absolute value, and determine the absolute values ​​of the other two phase currents of the oil pump motor at the second position angle, which are the third current absolute value and the fourth current absolute value; and determine the current operating mode of the oil pump motor based on the relationship between the first current absolute value and the second current absolute value, and the relationship between the third current absolute value and the fourth current absolute value.

[0102] According to one embodiment of the present invention, the current operating mode includes any one of UVW mode, UWV mode, VWU mode, VUW mode, WUV mode and WVU mode.

[0103] According to one embodiment of the present invention, the fault detection module 30 performs mode matching detection on the current operating mode, including: acquiring a pre-configured standard operating mode of the oil pump motor; and determining that the oil pump motor has reversed fault when the current operating mode does not match the standard operating mode of the oil pump motor.

[0104] It should be noted that for details not disclosed in the electronic oil pump reversal fault detection device of the present invention, please refer to the details disclosed in the electronic oil pump reversal fault detection method of the above embodiments of the present invention, which will not be repeated here.

[0105] According to an embodiment of the present invention, the electronic oil pump reversal fault detection device acquires the current of any one phase of the oil pump motor through an acquisition module, and determines the currents of the other two phases of the oil pump motor at a first position angle and a second position angle based on the arbitrary phase current. The determination module determines the current operating mode of the oil pump motor based on the other two phase currents at the first and second position angles. The fault detection module performs mode matching detection on the current operating mode to determine whether the oil pump motor has experienced a reversal fault. Therefore, this device determines the current operating mode of the motor based on the other two phase currents at the first and second position angles, thereby determining whether the electronic oil pump has experienced a reversal fault. Without increasing the application cost of the electronic oil pump, it can achieve real-time online monitoring of electronic oil pump reversal faults, improving the operational reliability and safety of the electronic oil pump.

[0106] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0107] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0108] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0109] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0110] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0111] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for detecting reverse rotation faults in an electronic oil pump, characterized in that, include: Obtain the current of any one phase of the oil pump motor, and based on the motor position angle of the arbitrary phase current at the target amplitude time, superimpose the motor position angle with a first preset angle to obtain a first position angle, and superimpose the motor position angle with a second preset angle to obtain a second position angle, wherein the second preset angle is greater than the first preset angle, and determine the other two phase currents of the oil pump motor at the first position angle and the second position angle. The current three-phase current phase sequence operation mode of the oil pump motor is determined based on the other two phase currents of the oil pump motor at the first position angle and the second position angle. Obtain the pre-configured standard operating mode of the oil pump motor, compare the current three-phase current phase sequence operating mode with the standard operating mode of the oil pump motor, and determine that the oil pump motor has a reverse rotation fault when the current three-phase current phase sequence operating mode is inconsistent with the standard operating mode of the oil pump motor.

2. The method according to claim 1, characterized in that, The first preset angle is 60°, and the second preset angle is 120°.

3. The method according to claim 1, characterized in that, The target amplitude time is the time when the current in any one phase reaches its maximum amplitude.

4. The method according to any one of claims 1-3, characterized in that, The current operating mode of the oil pump motor is determined based on the other two phase currents of the oil pump motor at the first and second position angles, including: The absolute values ​​of the other two phase currents of the oil pump motor at the first position angle are determined as the first absolute current value and the second absolute current value, and the absolute values ​​of the other two phase currents of the oil pump motor at the second position angle are determined as the third absolute current value and the fourth absolute current value. The current operating mode of the oil pump motor is determined based on the relationship between the absolute values ​​of the first and second currents and the relationship between the absolute values ​​of the third and fourth currents.

5. The method according to claim 4, characterized in that, The current operating mode includes any one of UVW mode, UWV mode, VWU mode, VUW mode, WUV mode, and WVU mode.

6. A computer-readable storage medium, characterized in that, It stores an electronic oil pump reversal fault detection program, which, when executed by the processor, implements the electronic oil pump reversal fault detection method according to any one of claims 1-5.

7. An electronic oil pump, characterized in that, The device includes a memory, a processor, and an electronic oil pump reversal fault detection program stored in the memory and executable on the processor. When the processor executes the electronic oil pump reversal fault detection program, it implements the electronic oil pump reversal fault detection method according to any one of claims 1-5.

8. A vehicle, characterized in that, Includes the electronic oil pump according to claim 7.

9. A device for detecting reverse rotation faults in an electronic oil pump, characterized in that, include: The acquisition module is used to acquire the current of any one phase of the oil pump motor, and based on the motor position angle of the arbitrary phase current at the target amplitude time, to superimpose the motor position angle with a first preset angle to obtain a first position angle, and to superimpose the motor position angle with a second preset angle to obtain a second position angle, wherein the second preset angle is greater than the first preset angle, and to determine the other two phase currents of the oil pump motor at the first position angle and the second position angle. The determination module determines the current three-phase current phase sequence operation mode of the oil pump motor based on the other two phase currents of the oil pump motor at the first position angle and the second position angle. The fault detection module acquires the pre-configured standard operating mode of the oil pump motor, compares the current three-phase current phase sequence operating mode with the standard operating mode of the oil pump motor, and determines that the oil pump motor has reversed due to a mismatch between the current three-phase current phase sequence operating mode and the standard operating mode of the oil pump motor.

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