Electronic oil pump detection system, electronic oil pump detection method and electronic oil pump detection device

Abstract

The invention provides an electronic oil pump detection system and an electronic oil pump detection method and device.The system comprises a detection assembly and a controller, and the detection assembly comprises a ball valve base electrically connected with a negative voltage contact of the controller; the spring base is electrically connected with a positive voltage contact of the controller; one end of the conductive spring is electrically connected with the spring base, and the other end is electrically connected with the conductive ball valve; the conductive ball valve is in contact with the ball valve base; when the electronic oil pump pumps oil, the conductive ball valve is pushed by the oil to push the conductive spring to enter a compressed state, so that the conductive ball valve is separated from the ball valve base; the controller is used for determining whether the electronic oil pump is in an abnormal state or not based on the feedback current of the circuit loop formed by the detection assembly and the controller, when the electronic oil pump is in the target working state and the controller detects the feedback current, it is judged that the electronic oil pump has a dry running fault, the detection cost is reduced, and the detection efficiency is improved. And the oil suction state of the oil pump can be accurately monitored.

Description

Technical Field

[0001] The present application relates to the technical field of oil pump control, and in particular to an electronic oil pump detection system, an electronic oil pump detection method, and an electronic oil pump detection device. Background Art

[0002] During the operation of the electronic oil pump, the problem of dry running of the electronic oil pump may occur. In the general oil pump dry running detection process, a single parameter (temperature, flow rate or pressure) is mainly relied on as the basis for determining whether the electronic oil pump has run dry. This detection method has the following defects:

[0003] 1. The temperature sensor has a delayed response and cannot detect the initial state of the oil pump running dry after emptying. It can only detect that the oil pump is damaged after the temperature rises due to wear, and cannot play a protective role.

[0004] 2. Pressure sensors and flow meters are prone to misjudgment when the oil circuit is blocked, leaking, or working at low flow. At the same time, the introduction of various sensors will increase costs and increase the difficulty of layout and integration;

[0005] 3. The current signal judgment accuracy is low. Although theoretically the current may decrease when the electronic oil pump is empty and idling due to the lack of oil pressure load, in actual application, due to dry friction between the oil pump rotor and the cavity, the torque may decrease instead of increase. It is impossible to accurately detect whether the electronic oil pump is empty, which often leads to misjudgment and affects the smooth operation of the system. Summary of the Invention

[0006] The embodiments of the present application provide an electronic oil pump detection system, an electronic oil pump detection method, and a device. The oil pump dry-run detection performed by the electronic oil pump detection system can be completed in a relatively short time without adding additional temperature sensors or pressure sensors, thereby reducing the cost of the detection system, and can also reduce the cost of detecting oil pump air suction faults, and reduce the loss of the hybrid box caused by the oil pump dry-running.

[0007] In a first aspect, an embodiment of the present application provides an electronic oil pump detection system, comprising: a detection component and a controller, wherein the detection component is arranged on the oil delivery pipeline of the electronic oil pump; wherein the detection component comprises: a ball valve base, a spring base, a conductive spring and a conductive ball valve; the ball valve base is electrically connected to the negative voltage contact of the controller; the spring base is electrically connected to the positive voltage contact of the controller; one end of the conductive spring is electrically connected to the spring base and the other end is electrically connected to the conductive ball valve; the conductive ball valve is arranged in contact with the ball valve base; wherein, when the electronic oil pump pumps oil, the conductive ball valve is pushed by the thrust of the oil to push the conductive spring into a compressed state, causing the conductive ball valve to separate from the ball valve base; the controller is used to determine whether the electronic oil pump is in an abnormal state based on the feedback current of the circuit loop formed by the detection component and the controller, wherein, when the electronic oil pump is in the target working state, when the controller detects the feedback current, it determines that the electronic oil pump has a dry-run fault.

[0008] In one possible implementation, the controller is also connected to the drive motor of the electronic oil pump; the controller is also used to control the electronic oil pump to suck oil at the highest speed when it is determined that the electronic oil pump has a dry-running fault, so as to adjust the electronic oil pump from a dry-running state to an oil-sucking state.

[0009] In one possible implementation, the controller is further configured to, when determining that the electronic oil pump has a dry-running fault, control the electronic oil pump to suck oil at a maximum speed, so as to adjust the electronic oil pump from a dry-running state to an oil-sucking state, including: when determining that the electronic oil pump has a dry-running fault, the controller controls the electronic oil pump to suck oil at a maximum speed after determining that the electronic oil pump meets a restart condition and meets an electronic oil pump drive motor speed adjustment condition, and detects whether the electronic oil pump detects the feedback current in the highest-speed oil-sucking state, wherein when the feedback current is detected in the highest-speed oil-sucking state, and on the premise that the electronic oil pump drive motor speed adjustment condition is met, periodically control the electronic oil pump to suck oil at the maximum speed until the electronic oil pump recovers from the dry-running state to the oil-sucking state.

[0010] In one possible implementation, determining that the electronic oil pump meets the restart condition includes: determining whether the number of restarts of the electronic oil pump drive motor is less than a preset restart number, wherein, when the number of restarts of the electronic oil pump drive motor is less than the preset restart number, it is determined that the electronic oil pump meets the restart condition.

[0011] In one possible implementation, when the feedback current is not detected in the highest-speed oil suction state, the controller controls the electronic oil pump drive motor to restore the speed before adjustment to suck oil, and determines again whether the feedback current is detected; wherein, after the electronic oil pump drive motor restores the speed before adjustment to suck oil, if the feedback current is not detected, it is determined that the electronic oil pump is operating normally; if the feedback current is detected, the electronic oil pump drive motor is restarted on the premise that the electronic oil pump meets the restart conditions, and the electronic oil pump is adjusted to recover from the dry-running state to the oil suction state.

[0012] In one possible implementation, after the electronic oil pump drive motor is restarted, it is determined whether the feedback current is detected after the restart, wherein if the feedback current is detected after the restart, it is determined that the electronic oil pump is faulty, and if the feedback current is not detected after the restart, it is determined again whether the feedback current is detected to determine whether the electronic oil pump has restored its oil suction capacity; wherein, after determining again to detect the feedback current, if the feedback current is not detected, it is determined that the electronic oil pump has restored its oil suction capacity and is operating normally; if the feedback current is detected and it is determined that the number of restarts is not less than the preset number of restarts, it is determined that the electronic oil pump is faulty.

[0013] In one possible implementation, the electronic oil pump driving motor speed adjustment condition is met, including: determining whether the electronic oil pump's maximum speed oil suction times are less than a preset high-speed oil suction times, wherein, when the electronic oil pump's maximum speed oil suction times are less than a preset high-speed oil suction times, it is determined that the electronic oil pump driving motor speed adjustment condition is met.

[0014] In a possible implementation, the controller is further configured to control the hybrid transmission drive motor to shut down when it is determined that the electronic oil pump has a dry-run fault.

[0015] In the second aspect, an embodiment of the present application also provides an electronic oil pump detection method, which is applied to the electronic oil pump detection system provided in the first aspect. The method includes detecting the feedback current of the electronic oil pump detection system after the electronic oil pump enters the target working state; when the feedback current is detected, it is determined that the electronic oil pump has a dry-running fault; when the feedback current is not detected, it is determined that the electronic oil pump is operating normally.

[0016] In a third aspect, an embodiment of the present application further provides an electronic oil pump detection device, comprising a processor and a memory, wherein the memory is used to store at least one instruction, and when the instruction is loaded and executed by the processor, the electronic oil pump detection method provided in the second aspect is implemented.

[0017] Through the above technical solution, by detecting the feedback current of the circuit loop formed by the detection component and the controller in the electronic oil pump detection system, it is detected whether the electronic oil pump is in a dry-running state, so that the electronic oil pump dry-running detection can be performed without setting up additional sensors, thereby reducing the detection cost, and by converting the oil discharge signal of the oil pump into an electrical signal through the opening and closing of the mechanical one-way valve and feeding it back to the controller, the oil suction state of the oil pump can be accurately monitored, thereby improving the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] Figure 1 A schematic diagram of the structure of an electronic oil pump detection system provided in one embodiment of the present application;

[0020] Figure 2 A schematic diagram of the telescopic state of a conductive spring provided in one embodiment of the present application;

[0021] Figure 3 A schematic diagram of a compressed state of a conductive spring provided in one embodiment of the present application;

[0022] Figure 4 A connection diagram of an electronic oil pump detection system provided in one embodiment of the present application;

[0023] Figure 5 A flow chart of an electronic oil pump detection method provided in one embodiment of the present application;

[0024] Figure 6 A flowchart of an electronic oil pump detection method provided in another embodiment of the present application;

[0025] Figure 7 A schematic structural diagram of an electronic oil pump detection device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0026] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0027] The terms used in the embodiments of the present application are for the purpose of describing specific embodiments only and are not intended to limit the present application. The singular forms "a", "an", "the" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise.

[0028] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0029] Figure 1 A schematic structural diagram of an electronic oil pump detection system provided in one embodiment of the present application.

[0030] Reference Figure 1 As shown, the electronic oil pump detection system may include a detection component 10 and a controller 20 .

[0031] In some embodiments, the detection assembly 10 can be disposed on the oil delivery pipeline of the electronic oil pump. The detection assembly 10 and the controller 20 can be connected to form a circuit loop. Specifically, the two ends of the detection assembly 10 can be connected to the negative voltage contact (vout-) and the positive voltage contact (vcc+) of the controller, respectively, to form the circuit loop.

[0032] Reference Figure 1 As shown, the detection assembly 10 may include a ball valve base 101, a spring base 102, a conductive spring 103, and a conductive ball valve 104. One end of the conductive spring 103 is electrically connected to the spring base 102, and the other end is electrically connected to the conductive ball valve 104. The connected conductive spring 103 and conductive ball valve 104 can form a telescopic switch.

[0033] In one embodiment, the two ends of the detection component 10 can be respectively connected to the negative voltage contact (vout-) of the controller and the positive voltage contact (vcc+) of the controller, and can be electrically connected to the negative voltage contact of the controller 20 through the ball valve base 101, and electrically connected to the positive voltage contact of the controller 20 through the spring base 102.

[0034] Figure 2 A schematic diagram of the telescopic state of a conductive spring provided in one embodiment of the present application.

[0035] Reference Figure 2As shown, since the detection component 10 is arranged on the oil delivery pipeline of the electronic oil pump, when the electronic oil pump is not pumping oil, the conductive ball valve is not subjected to the thrust generated by the movement of the oil, which will cause the conductive spring 103 to be in an extended state, so that the conductive ball valve 104 can contact the ball valve base 101, that is, the telescopic switch formed by the conductive spring 103 and the conductive ball valve 104 is currently in a closed state, causing the circuit loop formed by the connection between the detection component 10 and the controller 20 to be in a conductive state.

[0036] Figure 3 A schematic diagram of a compressed state of a conductive spring provided in one embodiment of the present application.

[0037] Reference Figure 3 As shown, when the electronic oil pump pumps oil, the conductive ball valve will be subjected to the thrust generated by the movement of the oil, and push the conductive spring 103 into a compressed state, and the conductive ball valve 104 and the ball valve base 101 are changed from a contact state to a separation state, that is, the telescopic switch formed by the conductive spring 103 and the conductive ball valve 104 is currently in a disconnected state, causing the circuit loop formed by the connection between the detection component 10 and the controller 20 to be in a disconnected state.

[0038] In some embodiments, when performing dry-run detection on the electronic oil pump, the controller 20 can determine whether the electronic oil pump currently has a dry-run fault based on the working status of the electronic oil pump to detect the on / off status of the circuit loop formed by the detection component 10 and the controller 20.

[0039] In some embodiments, the controller 20 acquiring the working state of the electronic oil pump may include determining that the electronic oil pump is in the first working state when confirming that the driving motor of the electronic oil pump drives the oil pump rotor to reach the target torque and target speed.

[0040] In some embodiments, the controller 20 may determine that the electronic oil pump is in the second operating state when it is confirmed that the drive motor of the electronic oil pump drives the oil pump rotor to reach a target torque and a target speed and maintains the target speed for a first time period. For example, the first time period may be 2 seconds.

[0041] In some embodiments, the controller 20 determining that the electronic oil pump is in the target operating state may include determining that the electronic oil pump is in the first operating state or the second operating state.

[0042] In some embodiments, after the controller 20 determines that the electronic oil pump is in the target working state, the current signal of the circuit loop formed by the detection component 10 and the controller 20 can be collected for monitoring. When the vcc+ to vout- loop current signal is detected, it is determined that the electronic oil pump has a dry-run fault; when the vcc+ to vout- loop current signal is not detected, it is determined that the electronic oil pump is operating normally.

[0043] Figure 4 A connection diagram of an electronic oil pump detection system provided in one embodiment of the present application.

[0044] Reference Figure 4 As shown, the electronic oil pump may include a drive motor and an oil pump rotor, wherein the drive motor drives the oil pump rotor to rotate to achieve oil pumping.

[0045] In some embodiments, the controller can also be connected to the drive motor of the electronic oil pump. When the controller detects that the electronic oil pump has a dry-running fault, it can send a control signal to the drive motor of the electronic oil pump to adjust the speed of the drive motor of the electronic oil pump to restore the oil pumping capacity of the electronic oil pump.

[0046] The present application also provides an electronic oil pump detection method, which is applied to the electronic oil pump detection system provided in the present application, and specifically to the controller of the electronic oil pump detection system. The electronic oil pump detection system performs dry-run detection on the oil pump by executing the oil pump detection method. The system converts the oil discharge signal of the electronic oil pump into an electrical signal through the opening and closing of a mechanical one-way valve, and feeds the signal back to the controller. Based on the feedback result, the controller determines whether the electronic oil pump has a dry-run fault. If a dry-run fault is determined, the controller adjusts the speed of the electronic oil pump to restore the oil pumping capacity of the electronic oil pump.

[0047] The electronic oil pump detection method provided in the embodiment of the present application is described in detail below with reference to the accompanying drawings.

[0048] Figure 5 A flowchart of an electronic oil pump detection method provided in one embodiment of the present application.

[0049] Reference Figure 5 As shown, the electronic oil pump detection method may include the following steps:

[0050] S501: After the electronic oil pump enters the target operating state, the feedback current of the electronic oil pump detection system is detected.

[0051] In some embodiments, the controller of the electronic oil pump detection system may detect whether there is feedback current in the circuit loop of the electronic oil pump detection system after the electronic oil pump enters the target operating state. The controller may determine whether the electronic oil pump enters the target operating state by:

[0052] 1. When it is confirmed that the driving motor of the electronic oil pump drives the oil pump rotor to reach the target torque and target speed, it is determined that the electronic oil pump is in the first working state.

[0053] 2. When it is confirmed that the electronic oil pump's drive motor drives the oil pump rotor to reach the target torque and target speed, and maintains the target speed for a first time period, the electronic oil pump is determined to be in the second working state. For example, the first time period may be 2 seconds.

[0054] In some embodiments, the controller determining that the electronic oil pump is in the target operating state may include determining that the electronic oil pump is in a first operating state or a second operating state.

[0055] Once the controller determines that the electronic oil pump has entered its target operating state, it begins pumping oil and delivering it to the hybrid transmission's drive motor. This circulating oil provides cooling and lubrication for the hybrid transmission's drive motor. Therefore, it's necessary to test whether the electronic oil pump is successfully priming. If it fails, there's a risk of the pump running dry.

[0056] S502: When the feedback current is detected, it is determined that the electronic oil pump is running dry.

[0057] S503: When no feedback current is detected, it is determined that the electronic oil pump is not running dry.

[0058] In some embodiments, the controller can determine whether it can detect a circuit loop feedback current after determining that the electronic oil pump has entered a target operating state. When the circuit loop formed by the detection component and the controller is conductive, the feedback current can be detected; if the circuit loop is disconnected, the feedback current cannot be detected. Therefore, based on the connection structure of the detection component of the electronic oil pump detection system, when the controller detects the feedback current, it determines that the electronic oil pump has failed to successfully absorb oil and pump it, i.e., it can be determined that the electronic oil pump is currently in a dry-run state. Conversely, when the controller does not detect the feedback current, it can be determined that the electronic oil pump has successfully absorbed oil and pumped it, i.e., it can be determined that the electronic oil pump is currently not in a dry-run state.

[0059] pass Figure 5 The electronic oil pump detection method provided in the illustrated embodiment detects whether the electronic oil pump is in a dry-running state by detecting the feedback current of the circuit loop formed by the detection component and the controller in the electronic oil pump detection system. This allows for dry-running detection of the electronic oil pump without the need for additional sensors, thereby reducing detection costs. Furthermore, by converting the oil discharge signal of the oil pump into an electrical signal through the opening and closing of a mechanical one-way valve and feeding it back to the controller, the oil suction state of the oil pump can be accurately monitored, thereby improving detection accuracy.

[0060] In some embodiments, after the electronic oil pump detection system detects that the electronic oil pump is running dry, adaptive adjustment can be performed. Specifically, the electronic oil pump detection method provided in the embodiment of the present application can also include the above-mentioned corresponding adjustment method, which is described in detail below with reference to the accompanying drawings.

[0061] Figure 6 A flowchart of an electronic oil pump detection method provided in another embodiment of the present application.

[0062] Reference Figure 6 As shown, the detection method may include the following steps:

[0063] S601: After the electronic oil pump enters the target operating state, the feedback current of the electronic oil pump detection system is detected.

[0064] In some embodiments, the specific implementation of S601 can be the same as Figure 5 The specific implementation of S501 in the illustrated embodiment is the same or similar and will not be described again here.

[0065] If no feedback current is detected based on the detection result of S601, S609 is executed to determine that the electronic oil pump is operating normally; if feedback current is detected, S602a and S602b are executed. In some embodiments, S602a and S602b can be executed in series or in parallel.

[0066] S602a: Control the hybrid box drive motor to stop.

[0067] In some embodiments, if the controller detects the feedback current of the circuit loop formed by the detection component and the controller, it indicates that the circuit loop is currently in a conductive state, that is, the electronic oil pump has failed to successfully absorb and pump oil (the electronic oil pump has run dry). The hybrid transmission drive motor cannot obtain the oil pumped by the electronic oil pump for cooling and lubrication, which will cause certain damage to the hybrid transmission drive motor. To avoid this damage, the hybrid transmission drive motor can be immediately controlled to shut down when the electronic oil pump runs dry. When the oil pump runs dry, the hybrid transmission is shut down first, and then the electronic oil pump is automatically repaired to protect the safety of the hybrid transmission and the electronic oil pump system.

[0068] S602b: Determine whether the restart count K of the electronic oil pump is less than a preset restart count.

[0069] In some embodiments, a maximum restart number of the electronic oil pump can be preset as a preset restart number, that is, in actual use, the number of restarts of the electronic oil pump must not exceed the preset restart number. In one embodiment, the preset restart number can be 1, in other words, the electronic oil pump is set to restart at most once.

[0070] When the controller determines that the restart times of the electronic oil pump are less than the preset restart times, S603 may be executed; when the controller determines that the restart times of the electronic oil pump are not less than the preset restart times, S608 may be executed.

[0071] S603: Determine whether the number N of times the electronic oil pump sucks oil at the highest speed is less than a preset number of times of high-speed oil suction.

[0072] In some embodiments, a preset limit on the number of times the electronic oil pump can draw oil at the highest speed can be used as the preset high-speed oil drawing number. In one embodiment, the preset high-speed oil drawing number can be 2 times. In other words, the electronic oil pump can draw oil at the highest speed for a maximum of 2 times.

[0073] Among them, when the controller determines that the electronic oil pump absorbs oil at the highest speed N times less than the preset high-speed oil absorption times, S604 can be executed; when the controller determines that the electronic oil pump absorbs oil at the highest speed N times not less than the preset high-speed oil absorption times, S606 is executed.

[0074] Among them, what needs to be explained about S602b and S603 is that when it is determined based on the detection result of S601 that the electronic oil pump has a dry-running abnormality (dry-running fault), the self-priming ability of the electronic oil pump can be restored by adjusting the speed of the electronic oil pump drive motor, thereby restoring the pumping of oil to the hybrid box drive motor. However, before performing the above-mentioned electronic oil pump drive motor speed adjustment, it is necessary to determine whether the current conditions for the electronic oil pump drive motor speed adjustment are met, that is, to determine whether the number of times the electronic oil pump sucks oil at the highest speed N is less than the preset high-speed oil suction number.

[0075] When the self-priming ability of the electronic oil pump cannot be restored by adjusting the speed of the electronic oil pump drive motor, the self-priming ability of the electronic oil pump can be restored by restarting the electronic oil pump drive motor. Similarly, before restarting the electronic oil pump drive motor, it is necessary to determine whether the conditions for restarting the electronic oil pump drive motor are met, that is, to determine whether the number of electronic oil pump restarts K is less than the preset number of restarts.

[0076] It should also be noted that in some embodiments, the priority of determining the restart condition of the electronic oil pump drive motor can be set higher than the priority of determining the speed adjustment condition of the electronic oil pump drive motor. That is, it can be prioritized to determine whether the number of electronic oil pump restarts K is less than the preset restart number. If the restart condition is met (K is less than the preset restart number), it is then determined whether the number of times the electronic oil pump draws oil at the highest speed N is less than the preset high-speed oil drawing number, thereby ensuring the normal operation of the electronic oil pump. In particular, by limiting the number of self-rescue and restart control times, it is possible to avoid damage to the electronic oil pump caused by repeated dry running of the electronic oil pump.

[0077] S604: Adjust the speed of the electronic oil pump drive motor to the maximum speed, and accumulate the number of oil suction times N at the maximum speed.

[0078] In some embodiments, if the electronic oil pump is determined to be dry-running through the detection in S601, and further through the conditional judgment in S602b and S603, it is determined that the restart count K of the electronic oil pump is less than the preset restart count, and the number N of times the electronic oil pump's drive motor draws oil at maximum speed is less than the preset high-speed oil draw count, then the electronic oil pump drive motor can be adjusted to restore the electronic oil pump's self-priming capability, thereby pumping oil for the hybrid transmission drive motor. Specifically, the speed of the electronic oil pump drive motor can be adjusted to the maximum speed to draw oil, that is, by adjusting the speed of the electronic oil pump drive motor to the maximum speed to attempt to restore the electronic oil pump's self-priming capability. Restoring the electronic oil pump's self-priming capability by adjusting the speed of the electronic oil pump drive motor can avoid dry-running caused by increased oil suction flow resistance due to low temperature environments and the inability to draw oil due to excessively low target speed torque of the electronic oil pump.

[0079] In some embodiments, the controller adjusts the speed of the electronic oil pump drive motor to the maximum speed for oil suction for a first period of time, and after the first period of time, restores the speed of the electronic oil pump drive motor to the speed before adjustment or a preset normal speed.

[0080] In some embodiments, the controller may further accumulate the number of maximum-speed oil suction times N based on a counter after performing a speed adjustment of the electronic oil pump drive motor (adjusting to the maximum speed). For example, the number N may initially be 0. After the electronic oil pump drive motor speed is adjusted to the maximum speed, the number N is accumulated by 1, i.e., after the current adjustment, N = 0 + 1 = 1.

[0081] S605: Determine whether the electronic oil pump detects a feedback current in the highest speed oil suction state.

[0082] In some embodiments, after the speed adjustment of the electronic oil pump drive motor is completed through S604, it is possible to determine whether the circuit loop formed by the detection component and the controller detects a feedback current when the electronic oil pump is sucking oil at the highest speed, that is, to determine whether the electronic oil pump can restore its self-priming ability and pump oil to the drive motor of the hybrid box when sucking oil at the highest speed.

[0083] When the controller detects the feedback current, it returns to S603 ; when the controller does not detect the feedback current, it returns to S601 .

[0084] Specifically, when the electronic oil pump is sucking oil at the highest speed, if feedback current is detected, it is determined that the electronic oil pump is still in a dry-running state, and the process can return to S603 to control the electronic oil pump to perform electronic oil pump drive motor speed adjustment again. Specifically, based on S603, it can be determined that the number of times N of oil suction at the highest speed is less than the preset high-speed oil suction number, and based on S604, the electronic oil pump drive motor can be controlled to suck oil at the highest speed again. When the electronic oil pump drive motor sucks oil at the highest speed for the Nth time (currently N≠0), it returns to S605 again to determine whether the feedback current can be detected at present. When the controller detects the feedback current, it can be determined that the oil suction at the highest speed has failed this time, and it can return to S603 again, cyclically execute the speed adjustment of the electronic oil pump drive motor, and suck oil at the highest speed until the number of times N of oil suction at the highest speed is not less than the preset high-speed oil suction number, jump to S606 and switch to try to restore the self-priming capacity of the electronic oil pump by restarting the electronic oil pump drive motor; when the controller does not detect the feedback current, it is determined that the oil suction at the highest speed is successful this time. Since one oil suction and discharge action is completed, there is an oil film inside the oil pump rotor of the electronic oil pump, the gap is reduced, and the oil suction capacity is increased. It can jump to S601, restore to the speed before adjustment or the preset normal speed for oil suction, and determine whether the feedback current can be detected to detect the recovery effect of the oil suction capacity of the electronic oil pump. Among them, when the recovery effect of the electronic oil pump's oil suction capacity is determined by the S601 test result, when no feedback current is still detected, it can be determined that the electronic oil pump is working normally, that is, the oil suction capacity of the electronic oil pump has been restored; when the recovery effect of the electronic oil pump's oil suction capacity is determined by the S601 test result, if the feedback current can be detected when absorbing oil at the speed before adjustment or the preset normal speed, it can be determined that the electronic oil pump has run dry again, that is, the oil suction capacity of the electronic oil pump has not been restored, and the speed adjustment of the electronic oil pump drive motor can be further cyclically executed, and oil can be absorbed at the highest speed until the number N of oil absorption at the highest speed is not less than the preset high-speed oil absorption number, and then jump to S606 to switch to try to restore the self-priming capacity of the electronic oil pump by restarting the electronic oil pump drive motor. By setting the electronic oil pump speed to increase and the restart control logic to restart the system, the system fault frequency is reduced and the system self-repair capability is improved.

[0085] S606: Restart the electronic oil pump drive motor and accumulate the restart times K.

[0086] In some embodiments, when it is determined that the number of times the electronic oil pump driving motor sucks oil at the highest speed N is not less than the preset high-speed oil suction number, it can be switched to trying to restore the self-priming ability of the electronic oil pump by restarting the electronic oil pump driving motor. After the restart is completed, the number of restarts K can be accumulated.

[0087] In some embodiments, when the electronic oil pump drive motor is restarted, a first fault record of the electronic oil pump may also be performed. For example, a first fault code indicating a current fault in the electronic oil pump may be recorded, i.e., the electronic oil pump has failed to pump oil at the highest speed K times, and the first fault code is recorded. In some application scenarios, after recording the first fault code, a user may be prompted based on the first fault code to perform maintenance on the electronic oil pump.

[0088] S607: Determine whether feedback current can be detected after the electronic oil pump is restarted.

[0089] In some embodiments, after completing the restart action of the electronic oil pump drive motor, it can be determined whether the feedback current can be detected after the electronic oil pump is restarted. If the feedback current can be detected, S608 is executed. If the feedback current is not detected, it can return to S601 to detect the recovery effect of the electronic oil pump's oil suction capacity under the restart mode. Among them, when determining the recovery effect of the electronic oil pump's oil suction capacity by executing S601, if no feedback current is detected, it can be determined that the electronic oil pump is working normally, that is, the electronic oil pump's oil suction capacity has been restored; when determining the recovery effect of the electronic oil pump's oil suction capacity by the S601 detection result, if feedback current is detected, it can be determined that the electronic oil pump still has a dry-running abnormality problem, that is, the electronic oil pump's oil suction capacity has not been restored by restarting, and then it can return to S602b. If the restart number K of the electronic oil pump drive motor is less than the preset restart number, you can continue to try to restart the electronic oil pump, thereby trying to restore the electronic oil pump's oil suction capacity by restarting the electronic oil pump drive motor several times. Based on the detection of S602b, if the restart number K of the electronic oil pump drive motor is not less than the preset restart number, S608 can be executed.

[0090] S608: Determine that the electronic oil pump is faulty.

[0091] In some embodiments, when a fault is determined in the electronic oil pump, a corresponding second fault code may also be recorded. This second fault code may indicate that neither priming the electronic oil pump at maximum speed nor restarting the electronic oil pump has successfully restored its self-priming capacity. In some application scenarios, after recording this second fault code, the user may be prompted to repair the electronic oil pump as soon as possible based on this second fault code.

[0092] In some embodiments, when a fault is determined in the electronic oil pump, the hybrid system can be controlled to shut down to prevent the electronic oil pump from running dry for a long time and failing to pump oil to the hybrid box drive motor, causing damage to the system and components.

[0093] S609: Determine whether the electronic oil pump is operating normally.

[0094] Through this application Figure 6The electronic oil pump detection method provided in the illustrated embodiment converts the oil discharge signal of the electronic oil pump into an electrical signal through the opening and closing of a mechanical one-way valve, and feeds it back to the motor controller. This can accurately monitor whether the oil pump is discharging oil, thereby avoiding the problem of damage to the system and components caused by the hybrid box continuing to operate without lubrication due to the inability to detect that the oil pump is empty. On the other hand, the above-mentioned detection method provided by the present application is more accurate than the judgment method based on the motor drive current, motor temperature, motor voltage, etc. in the prior art. Furthermore, the detection system provided by the present application does not require the addition of additional sensors and other equipment, thereby reducing the detection cost, and can also reduce the difficulty of integrating the detection actuator with the electronic oil pump. Compared with the solution of adding pressure sensors and flow meters in the prior art, it is less expensive, smaller in size, and easier to implement.

[0095] Figure 7 A schematic structural diagram of an electronic oil pump detection device provided in one embodiment of the present application.

[0096] Reference Figure 7 As shown, the electronic oil pump detection device may include a processor 701 and a memory 702, and the memory 702 is used to store at least one instruction, which, when loaded and executed by the processor 701, implements the electronic oil pump detection method provided in any embodiment of the present application.

[0097] It should be noted that the execution entity of S501~S503 and S601~S609 can be an electronic oil pump detection device, which can be an application located in the local terminal, or can also be a functional unit such as a plug-in or software development kit (SDK) in the application located in the local terminal. The embodiments of the present application do not specifically limit this.

[0098] It is understandable that the application may be an application program (nativeApp) installed on the terminal, or may be a web page program (webApp) of a browser on the terminal, and this embodiment of the present application does not limit this.

[0099] In some embodiments, the electronic oil pump detection device can be Figure 1 or Figure 2 The illustrated embodiment provides a controller 20 in an electronic oil pump detection system.

[0100] An embodiment of the present application further provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the electronic oil pump detection method provided in any embodiment of the present application is implemented.

[0101] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0102] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, which may be electrical, mechanical or other forms.

[0103] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0104] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0105] The above-mentioned integrated unit implemented in the form of a software functional unit can be stored in a computer-readable storage medium. The above-mentioned software functional unit is stored in a storage medium and includes a number of instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) or a processor to perform some steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and other media that can store program code.

[0106] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

[0107] Those skilled in the art will appreciate that all or part of the steps in the above-described method embodiments can be implemented using hardware associated with program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments. The aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0108] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units. That is, they may be located in one place or distributed across at least two network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An electronic oil pump detection system, characterized in that: The system includes: a detection component and a controller, wherein the detection component is arranged on the oil delivery pipeline of the electronic oil pump; Wherein, the detection component includes: a ball valve base, a spring base, a conductive spring and a conductive ball valve; The ball valve base is electrically connected to the negative voltage contact of the controller; The spring base is electrically connected to the positive voltage contact of the controller; The conductive spring has one end electrically connected to the spring base and the other end electrically connected to the conductive ball valve; The conductive ball valve is arranged in contact with the ball valve base; When the electronic oil pump pumps oil, the conductive ball valve is pushed by the thrust of the oil to push the conductive spring into a compressed state, causing the conductive ball valve to separate from the ball valve base; The controller is used to determine whether the electronic oil pump is in an abnormal state based on the feedback current of the circuit loop formed by the detection component and the controller, wherein, when the electronic oil pump is in the target working state, when the controller detects the feedback current, it is determined that the electronic oil pump has a dry-run fault.

2. The electronic oil pump detection system according to claim 1, characterized in that: The controller is also connected to the drive motor of the electronic oil pump; The controller is further configured to control the electronic oil pump to absorb oil at a maximum speed when determining that the electronic oil pump has a dry-run fault, so as to adjust the electronic oil pump to recover from a dry-run state to an oil-absorbing state.

3. The electronic oil pump detection system according to claim 2, characterized in that: The controller is further configured to control the electronic oil pump to suck oil at a maximum speed when determining that the electronic oil pump has a dry-run fault, so as to adjust the electronic oil pump to recover from a dry-run state to an oil-sucking state, including: When determining that the electronic oil pump has a dry-run fault, the controller controls the electronic oil pump to suck oil at a maximum speed after determining that the electronic oil pump meets a restart condition and meets a speed adjustment condition of the electronic oil pump drive motor. The controller also detects whether the electronic oil pump detects the feedback current in the highest-speed oil suction state. When the feedback current is detected in the highest-speed oil suction state, the controller periodically controls the electronic oil pump to suck oil at the highest speed, provided that the speed adjustment condition of the electronic oil pump drive motor is met, until the electronic oil pump recovers from the dry-run state to the oil suction state.

4. The electronic oil pump detection system according to claim 3, characterized in that: Determining that the electronic oil pump meets the restart condition includes: Determine whether the restart number of the electronic oil pump drive motor is less than a preset restart number, wherein when the restart number of the electronic oil pump drive motor is less than the preset restart number, determine that the electronic oil pump meets the restart condition.

5. The electronic oil pump detection system according to claim 3, characterized in that: When the feedback current is not detected in the highest speed oil suction state, the controller controls the electronic oil pump drive motor to resume the speed before adjustment to suck oil, and determines again whether the feedback current is detected; Among them, after the electronic oil pump drives the motor to resume the speed before adjustment to absorb oil, if the feedback current is not detected, it is determined that the electronic oil pump is working normally; if the feedback current is detected, the electronic oil pump drives the motor to restart, and adjusts the electronic oil pump from the dry-running state to the oil-absorbing state, provided that the electronic oil pump meets the restart conditions.

6. The electronic oil pump detection system according to claim 5, characterized in that: After the electronic oil pump drive motor is restarted, determining whether the feedback current is detected after the restart, wherein if the feedback current is detected after the restart, determining that the electronic oil pump has failed; if the feedback current is not detected after the restart, determining again whether the feedback current is detected to determine whether the electronic oil pump has recovered its oil suction capacity; Among them, after determining and detecting the feedback current again, if the feedback current is not detected, it is determined that the electronic oil pump has restored its oil suction capacity and is working normally; if the feedback current is detected and it is determined that the restart number is not less than the preset restart number, it is determined that there is a fault in the electronic oil pump.

7. The electronic oil pump detection system according to claim 3 or 5, characterized in that: The electronic oil pump drive motor speed adjustment conditions include: Determine whether the maximum speed oil suction number of the electronic oil pump is less than the preset high-speed oil suction number, wherein when the maximum speed oil suction number of the electronic oil pump is less than the preset high-speed oil suction number, it is determined that the speed adjustment condition of the electronic oil pump drive motor is met.

8. The electronic oil pump detection system according to claim 2 or 3, characterized in that: The controller is further configured to control the hybrid box drive motor to shut down when determining that the electronic oil pump has a dry-run fault.

9. A method for detecting an electronic oil pump, characterized in that: Applied to the electronic oil pump detection system according to any one of claims 1 to 8, the method comprises: After the electronic oil pump enters the target working state, detecting the feedback current of the electronic oil pump detection system; When the feedback current is detected, it is determined that the electronic oil pump has a dry-run fault; When the feedback current is not detected, it is determined that the electronic oil pump is operating normally.

10. An electronic oil pump detection device, characterized in that: The device comprises: A processor and a memory, wherein the memory is used to store at least one instruction, and when the instruction is loaded and executed by the processor, the electronic oil pump detection method according to claim 9 is implemented.

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