A method, device, equipment and medium for determining service life of a pressure filter

Abstract

This application provides a method, apparatus, equipment, and medium for determining the service life of a pressure filter. The method includes: when a mobile vehicle travels to the target mileage for the current test, controlling the electric pump in the reducer to output oil at multiple preset flow rates, obtaining the phase current magnitude of the electric pump at different preset flow rates, wherein a pressure filter of the target model is installed in the reducer of the mobile vehicle; determining whether the phase current magnitude meets preset test requirements, which are requirements for the comparison between the phase current magnitude in the current test and the historical phase current magnitude; if the preset test requirements are met, the target mileage for the current test is taken as the maximum service life of the pressure filter of the target model. By adopting the above-mentioned method, apparatus, equipment, and medium for determining the service life of a pressure filter, the problems of high manpower and time costs and low accuracy in determining the service life of pressure filters in the prior art are solved.

Description

Technical Field

[0001] This application relates to the field of automotive manufacturing technology, and more specifically, to a method, apparatus, equipment, and medium for determining the service life of a pressure filter. Background Technology

[0002] Electric drive reducers are a crucial component of automobiles. Electric drive systems use pressure filters to remove impurities from the fluid. However, as impurities accumulate, the pressure filter gradually becomes clogged, reducing filtration accuracy and affecting the reducer's normal operation. Currently, the pressure filter is typically removed after a vehicle durability test and its performance is retested to determine its maximum service life. If the removed pressure filter meets performance requirements, the mileage from the vehicle durability test is taken as the maximum service life of that model of pressure filter. If the removed pressure filter does not meet performance requirements, the mileage is reduced, and the vehicle durability test is repeated until the performance meets the requirements.

[0003] However, when using the above method to determine the service life of a pressure filter, it is necessary to repeatedly disassemble the pressure filter for performance retesting, which not only consumes a lot of manpower and time, but also leads to low accuracy of the determined service life. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide a method, apparatus, equipment and medium for determining the service life of a pressure filter, so as to solve the problems of high manpower and time costs and low accuracy in determining the service life of a pressure filter.

[0005] In a first aspect, embodiments of this application provide a method for determining the service life of a pressure filter, including:

[0006] When the mobile vehicle travels to the target mileage for this round of testing, the electric pump in the reducer is controlled to output oil according to multiple preset flow rates. The phase current of the electric pump under different preset flow rates is obtained. The reducer of the mobile vehicle is equipped with a pressure filter of the target model.

[0007] Determine whether the phase current magnitude meets the preset detection requirements. The preset detection requirements are the requirements for comparing the phase current magnitude in this round of detection with the historical phase current magnitude.

[0008] If the preset testing requirements are met, the target mileage of this round of testing will be taken as the maximum service life of the target model pressure filter.

[0009] Optionally, controlling the electric pump in the reducer to output oil according to multiple preset flow rates, and obtaining the phase current magnitude of the electric pump under different preset flow rates includes: selecting a target flow rate from the flow rate sequence corresponding to the multiple preset flow rates; controlling the electric pump to output oil at the target flow rate when the oil temperature of the reducer reaches the preset oil temperature range; when the phase current magnitude is stable, taking the phase current magnitude at this time as the phase current magnitude under the target flow rate; selecting the next flow rate after the target flow rate from the flow rate sequence as the new target flow rate, and returning to the step of controlling the electric pump to output oil at the target flow rate.

[0010] Optionally, after determining whether the phase current meets the preset detection requirements, the method further includes: if the preset detection requirements are not met, determining the target mileage for the next round of detection, and when the mobile vehicle travels to the target mileage for the next round of detection, returning to the step of controlling the electric pump in the reducer to output oil according to multiple preset flow rates.

[0011] Optionally, determining whether the phase current magnitude meets the preset detection requirements includes: acquiring multiple sets of historical phase currents from historical rounds of detection adjacent to the current round of detection, with each set of historical phase currents corresponding to a historical round; generating phase current curves corresponding to the phase current of the current round of detection and the multiple sets of historical phase currents; and determining that the phase current magnitude meets the preset detection requirements when the curve coefficient of the target phase current curve is within the preset coefficient range.

[0012] Optionally, before controlling the electric pump in the reducer to output oil according to multiple preset flow rates and obtaining the phase current magnitude of the electric pump under different preset flow rates, the method further includes: determining multiple preset flow ranges, the multiple preset flow ranges covering the entire flow range of the electric pump; and for each preset flow range, selecting at least one preset flow rate from the preset flow range.

[0013] Optionally, the preset oil temperature range is 55°C to 90°C.

[0014] Optionally, multiple flows in the flow sequence are arranged in ascending order of their numerical values.

[0015] Secondly, embodiments of this application also provide a device for determining the service life of a pressure filter, the device comprising:

[0016] The phase current acquisition module is used to control the electric pump in the reducer to output oil at multiple preset flow rates when the mobile vehicle travels to the target mileage of the current test, and to obtain the phase current of the electric pump under different preset flow rates. The reducer of the mobile vehicle is equipped with a pressure filter of the target model.

[0017] The current judgment module is used to determine whether the phase current magnitude meets the preset detection requirements. The preset detection requirements are the requirements for the comparison results of the phase current magnitude in this round of detection and the historical phase current magnitude.

[0018] The lifespan determination module is used to determine the target mileage of the current test as the maximum lifespan of the target model pressure filter if the preset test requirements are met.

[0019] Thirdly, embodiments of this application also provide an electronic device, including: a processor, a memory, and a bus. The memory stores machine-readable instructions executable by the processor. When the electronic device is running, the processor communicates with the memory via the bus. When the machine-readable instructions are executed by the processor, the steps of the method for determining the service life of a pressure filter as described above are performed.

[0020] Fourthly, embodiments of this application also provide a computer-readable storage medium storing a computer program that, when executed by a processor, performs the steps of the method for determining the service life of a pressure filter as described above.

[0021] The embodiments of this application bring the following beneficial effects:

[0022] This application provides a method, apparatus, device, and medium for determining the service life of a pressure filter. It can acquire the phase current magnitude at different mileages when a mobile vehicle travels. Since the phase current magnitude reflects the clogging status of the pressure filter, the clogging status can be determined based on the changes in the phase current magnitude and historical phase current magnitudes, thereby determining the maximum service life of the pressure filter. This eliminates the need to disassemble the pressure filter and repeat vehicle durability tests. Compared to existing methods for determining the service life of pressure filters, this method solves the problems of high manpower and time costs and low accuracy in determining the service life of pressure filters.

[0023] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A flowchart illustrating the method for determining the service life of a pressure filter provided in an embodiment of this application is shown;

[0026] Figure 2A schematic diagram of the structure of the pressure filter lifespan determination device provided in an embodiment of this application is shown;

[0027] Figure 3 A schematic diagram of the structure of the electronic device provided in the embodiments of this application is shown. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. Based on the embodiments of this application, every other embodiment obtained by those skilled in the art without inventive effort falls within the scope of protection of this application.

[0029] It is worth noting that prior to this application, electric drive reducers were a crucial component of automobiles. Electric drive system reducers could filter impurities from the oil through pressure filters. However, as impurities accumulated, the pressure filters gradually became clogged, leading to reduced filtration accuracy and affecting the normal operation of the reducer. In existing technology, pressure filters are typically disassembled after a vehicle durability test and their performance is retested to determine their maximum service life. If the disassembled pressure filter meets performance requirements, the mileage of the vehicle durability test is taken as the maximum service life of that model of pressure filter. If the disassembled pressure filter does not meet performance requirements, the mileage needs to be reduced, and the vehicle durability test needs to be repeated until the performance meets the requirements. The performance requirements refer to whether the pressure drop value of the pressure filter meets the threshold requirement. However, determining the service life of a pressure filter using the above method requires repeated disassembly and performance retesting, which not only consumes a lot of manpower and time but also leads to low accuracy in the determined service life.

[0030] Based on this, this application provides a method for determining the service life of a pressure filter, so as to improve the accuracy of determining the service life of a pressure filter and reduce labor and time costs.

[0031] Please see Figure 1 , Figure 1 A flowchart illustrating a method for determining the service life of a pressure filter, provided as an embodiment of this application. Figure 1 As shown in the embodiments of this application, the method for determining the service life of a pressure filter includes:

[0032] Step S101: When the mobile vehicle travels to the target mileage for this round of detection, control the electric pump in the reducer to output oil according to multiple preset flow rates, and obtain the phase current of the electric pump under different preset flow rates.

[0033] In this step, a mobile vehicle can refer to a vehicle used to transport people and / or goods. For example, a mobile vehicle can be a rail vehicle, a road vehicle, an off-road vehicle, or an aircraft vehicle.

[0034] The electric drive system of the mobile vehicle is equipped with a speed reducer, and the speed reducer of the mobile vehicle is equipped with a pressure filter of the target model.

[0035] The electric pump is the electric pump in the reducer. It is used to deliver lubricating oil or coolant to the motor and is a key component for internal lubrication and cooling of the reducer.

[0036] The preset flow rate can refer to the set output flow rate of oil in the electric pump. For example, multiple preset flow rates can be 2L / min, 4L / min, 6L / min, 8L / min, 10L / min, 12L / min, 14L / min, or 3L / min, 5L / min, 7L / min, 9L / min, 11L / min, 13L / min.

[0037] In this embodiment, as impurities accumulate in the oil filtered by the pressure filter, the pressure filter gradually becomes clogged, leading to a decrease in filtration accuracy. Since the phase current of the pressure filter increases with the increase of load, when impurities continuously accumulate in the pressure filter, it is equivalent to an increase in load. To ensure that the electric pump outputs the same flow rate of oil, the phase current needs to be increased.

[0038] It can be seen that when the pressure filter is completely clogged, the load remains unchanged, and the phase current will also remain unchanged after increasing to a certain value. Therefore, the maximum service life of the pressure filter can be determined based on the characteristic that the phase current increases with the continuous accumulation of impurities.

[0039] When determining the maximum service life of a target model pressure filter, it is necessary to install that model of pressure filter on a mobile vehicle so that the maximum service life of the target model pressure filter can be determined through the operation of the mobile vehicle. Taking a vehicle as an example, the process of determining the maximum service life of the pressure filter can be carried out during the vehicle durability test. Whenever the vehicle travels to the target mileage of 5,000 km, 10,000 km, or 15,000 km, the electric pump in the reducer is controlled to output oil at seven preset flow rates of 2L / min, 4L / min, 6L / min, 8L / min, 10L / min, 12L / min, and 14L / min, and the phase current of the electric pump at each of these seven preset flow rates is recorded.

[0040] If the pressure filter lifespan test is conducted for the first time during the vehicle durability test, the target mileage is 5,000 kilometers. If the pressure filter lifespan test is conducted for the second time, the target mileage is 10,000 kilometers, and so on, until the phase current meets the preset test requirements.

[0041] Taking the initial pressure filter lifespan test as an example, when the vehicle's cumulative mileage reaches 5000 kilometers, the vehicle is stopped. The automotive electronic calibration tool CANAPE is connected to the mobile device and the vehicle's OBD3 port to send the data collected from the vehicle to the CANAPE software on the mobile device for processing. The connection method is as follows: connect the CANAPE's CAN1 port to the calibration CAN port in the connection cable, connect the CANAPE's CAN1 port to the vehicle's CAN port in the connection cable, and then connect the connection cable to the computer and the vehicle respectively. The purpose of stopping the vehicle is to prevent the electric pump oil temperature from exceeding the set range, which would cause inaccurate testing. The mobile device can be a smartphone, computer, or laptop. The mobile device has CANAPE software installed. CANAPE software is engineering software for testing electric pump current, which can be phase current or bus current.

[0042] It should be noted that the target mileage is a set value, and those skilled in the art can determine the specific value of the target mileage for each test based on the actual situation. This application does not impose any limitation on this value. Since impurities in the pressure filter only accumulate significantly after traveling a considerable distance, it is necessary to ensure that the difference between the target mileage for two adjacent tests is not less than a set threshold, for example, not less than 5000 kilometers. Otherwise, the recorded phase current will not change significantly, and the test objective will not be achieved.

[0043] In an optional embodiment, before step S101, the method further includes steps a1 and a2.

[0044] Step a1: Determine multiple set flow ranges.

[0045] Here, multiple preset flow ranges cover the entire flow range of the electric pump. When determining the preset flow rate, the entire flow range of the electric pump can be divided into multiple preset flow ranges. For example, if the entire flow range of the electric pump is 0L / min to 15L / min, it can be divided into five preset flow ranges: [0L / min, 3L / min], [3L / min, 6L / min], [6L / min, 9L / min], [9L / min, 12L / min], and [12L / min, 15L / min]. These five preset flow ranges cover the entire flow range of the electric pump.

[0046] Step a2: For each set flow range, select at least one preset flow rate from that set flow range.

[0047] By selecting one preset flow rate from each set flow rate range, you can obtain five preset flow rates: 3L / min, 5L / min, 7L / min, 10L / min, and 12L / min. If you need more preset flow rates, you can select one preset flow rate from odd-numbered set flow rate ranges and two preset flow rates from even-numbered set flow rate ranges, thus obtaining seven preset flow rates: 2L / min, 4L / min, 6L / min, 8L / min, 10L / min, 12L / min, and 14L / min.

[0048] In an optional embodiment, step S101 includes: step b1, step b2, step b3, and step b4.

[0049] Step b1: Select the target traffic from the traffic sequences corresponding to multiple preset traffic flows.

[0050] A flow sequence is formed by selecting multiple preset flow rates in order of their numerical values, and the multiple flow rates in the flow sequence are arranged in ascending order of their numerical values.

[0051] First, select the first preset flow rate in the flow rate sequence as the target flow rate and determine the phase current magnitude at this target flow rate. Then, select the second preset flow rate as the target flow rate and determine the phase current magnitude at this target flow rate. This process continues until all preset flow rates in the flow rate sequence have been selected as target flow rates.

[0052] Step b2: When the oil temperature of the reducer reaches the preset oil temperature range, control the electric pump to output oil at the target flow rate.

[0053] Open the engineering software installed on the computer to test the electric pump current, and determine whether the reducer oil temperature has reached the preset oil temperature range, which is 55℃ to 90℃. If the preset oil temperature range is reached, issue a flow control command through the engineering software. This flow control command includes the target flow rate, controlling the electric pump to output oil at a preset flow rate of 2L / min, and observe the change in phase current.

[0054] Step b3: When the phase current is stable, take the phase current at this time as the phase current under the target flow rate.

[0055] When the phase current is stable, that is, 10 seconds after the previous flow control command is issued, record the phase current magnitude at this time, and use this phase current magnitude as the phase current magnitude under the preset flow rate of 2L / min.

[0056] Step b4: Select the next target traffic from the traffic sequence as the new target traffic, and return to step b2.

[0057] Then, the second preset flow rate in the flow rate sequence is taken as the new target flow rate, i.e., 4L / min is selected as the new target flow rate. The next flow control command is input, which includes the new target flow rate. The process returns to step b2 to control the electric pump to output oil at a preset flow rate of 4L / min. When the phase current is stable, the magnitude of the phase current at the preset flow rate of 4L / min is recorded.

[0058] This process is repeated until the phase current magnitude corresponding to each preset flow rate is recorded.

[0059] Step S102: Determine whether the phase current magnitude meets the preset detection requirements.

[0060] In this step, the preset detection requirement is the requirement for comparing the phase current magnitude in this round of detection with the historical phase current magnitude.

[0061] Phase current is the current flowing through each phase load in a three-phase power supply.

[0062] In this embodiment of the application, since the phase current will remain unchanged after increasing to a certain value when the pressure filter is completely blocked, it is necessary to determine whether the phase current recorded in this round has reached a certain value and remains unchanged after each round of detection. If it remains unchanged, it means that the phase current meets the preset detection requirements.

[0063] Here, since the phase current gradually approaches a constant value during multiple rounds of detection, the phase current obtained in this round of detection can be compared with the phase current obtained in multiple historical rounds before this round. Based on the comparison results, it can be determined whether the phase current magnitude meets the preset detection requirements.

[0064] In an optional embodiment, step S102 includes: step c1, step c2, and step c3.

[0065] Step c1: Obtain multiple sets of historical phase currents from historical rounds of detection adjacent to the current round of detection.

[0066] Here, each set of historical phase currents corresponds to a historical wheel, that is, a set of historical phase currents is obtained by detecting a historical wheel, and each set of historical phase currents includes multiple historical phase currents under different preset flow rates.

[0067] Taking this round of testing as the seventh round as an example, the phase current detected in each of the previous six rounds of testing is obtained. The phase current detected in each of the six rounds of testing is called the historical phase current, and a total of six sets of historical phase currents can be obtained, with each set of historical phase currents corresponding to one historical round. Taking this round of testing as the eighth round as an example, the phase current detected in each of the previous seven rounds of testing is obtained.

[0068] Step c2 generates phase current curves corresponding to the phase current detected in this round and multiple sets of historical phase currents.

[0069] A coordinate system is constructed with the distance in kilometers as the x-axis and the phase current magnitude as the y-axis. Phase current curves corresponding to the phase current detected in this round and multiple sets of historical phase currents are generated within this coordinate system. Assuming this is the tenth round of detection, and each round has six preset flow rates, there are a total of six phase current curves corresponding to different preset flow rates. Each phase current curve has 10 data points, with one data point corresponding to one round.

[0070] Step c3: When the curve coefficient of the target phase current curve is within the preset coefficient range, it is determined that the phase current magnitude meets the preset detection requirements.

[0071] For each phase current curve, select the segment of the phase current curve located at the end position as the target phase current curve and determine the curve coefficient of the target phase current curve.

[0072] For example, if each phase current curve has 10 data points, select the curve corresponding to the last 3 data points as the target phase current curve, and a total of 6 target phase current curves can be obtained.

[0073] When each target phase current curve is a linear function and the coefficients of the linear terms are all within the preset range, the phase current magnitude is determined to meet the preset detection requirements. For example, when the coefficients of the linear terms are all within the range of [0, 0.1], the phase current magnitude is determined to meet the preset detection requirements.

[0074] In addition, if any target phase current curve is not a linear function or the coefficient of the linear term is not within the preset coefficient range, it is determined that the phase current magnitude does not meet the preset detection requirements.

[0075] In an optional embodiment, after step S102, step d1 is further included.

[0076] If the preset detection requirements are not met in step d1, the target mileage for the next round of detection is determined. When the mobile vehicle travels to the target mileage for the next round of detection, the process returns to step S101.

[0077] If the phase current does not meet the preset detection requirements, the next round of testing needs to be performed. This next round involves driving an additional 5000 kilometers based on the current test result. If this is the first round of testing, the next round will be performed after reaching the second target mileage of 10000 kilometers. When the vehicle reaches 10000 kilometers, the electric pump in the reducer is controlled to output oil at a preset flow rate, and the phase current corresponding to different preset flow rates at 10000 kilometers is obtained. This process continues until the phase current meets the preset detection requirements, at which point subsequent rounds of testing are not performed.

[0078] Step S103: If the preset testing requirements are met, the target mileage of this round of testing will be taken as the maximum service life of the pressure filter of the target model.

[0079] In this step, when each target phase current curve is a linear function and the coefficients of the linear terms are all within the preset coefficient range, it indicates that the phase current obtained in this round of detection meets the preset detection requirements. The target phase current curves are all close to the horizontal line parallel to the horizontal axis. At this time, the pressure filter has been completely blocked by impurities and the pressure filter has reached its maximum service life. Therefore, the target mileage of this round is taken as the maximum service life of the pressure filter of the target model.

[0080] For example, if the phase current meets the preset test requirements during the twentieth round of testing, and the vehicle has traveled 100,000 kilometers at this time, then the maximum service life of the target model pressure filter is determined to be 100,000 kilometers.

[0081] Compared with existing methods for determining the service life of pressure filters, this application can obtain the phase current magnitude at different mileages when the mobile vehicle travels. Since the phase current magnitude can reflect the clogging status of the pressure filter, the clogging status of the pressure filter can be determined based on the changes in the phase current magnitude and historical phase current magnitude, thereby determining the maximum service life of the pressure filter. This eliminates the need to disassemble the pressure filter and repeat the whole vehicle durability test, solving the problems of high manpower and time costs and low accuracy in determining the service life of pressure filters.

[0082] Based on the same inventive concept, this application also provides a device for determining the service life of a pressure filter, which corresponds to the method for determining the service life of a pressure filter. Since the principle of the device in this application is similar to the method for determining the service life of a pressure filter described above, the implementation of the device can refer to the implementation of the method, and the repeated parts will not be described again.

[0083] Please see Figure 2 , Figure 2 This is a schematic diagram of a device for determining the service life of a pressure filter, provided as an embodiment of this application. Figure 2 As shown, the pressure filter lifespan determination device 200 includes:

[0084] The phase current acquisition module 201 is used to control the electric pump in the reducer to output oil according to multiple preset flow rates when the mobile vehicle travels to the target mileage of the current test, and to acquire the phase current of the electric pump under different preset flow rates. The mobile vehicle is equipped with a pressure filter of the target model in the reducer.

[0085] The current judgment module 202 is used to determine whether the phase current magnitude meets the preset detection requirements. The preset detection requirements are the requirements for the comparison results between the phase current magnitude in this round of detection and the historical phase current magnitude.

[0086] The lifespan determination module 203 is used to determine the target mileage of the current test as the maximum lifespan of the pressure filter of the target model if the preset test requirements are met.

[0087] Please see Figure 3 , Figure 3 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Figure 3 As shown, the electronic device 300 includes a processor 310, a memory 320, and a bus 330.

[0088] The memory 320 stores machine-readable instructions executable by the processor 310. When the electronic device 300 is running, the processor 310 and the memory 320 communicate via the bus 330. When the machine-readable instructions are executed by the processor 310, they can perform the operations described above. Figure 1 The steps of the method for determining the service life of the pressure filter in the illustrated embodiment can be found in the method embodiment for specific implementation, and will not be repeated here.

[0089] This application also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, can perform the above-described actions. Figure 1The steps of the method for determining the service life of the pressure filter in the illustrated embodiment can be found in the method embodiment for specific implementation, and will not be repeated here.

[0090] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0091] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the shown or discussed mutual couplings, direct couplings, or communication connections may be through some communication interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms.

[0092] The units described as separate components may or may not be physically separate. 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 the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0093] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0094] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a processor-executable, non-volatile, computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0095] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The scope of protection of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the scope of the technology disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for determining the service life of a pressure filter, characterized in that, include: When the mobile vehicle travels to the target mileage for this round of testing, the electric pump in the reducer is controlled to output oil according to multiple preset flow rates, and the phase current of the electric pump under different preset flow rates is obtained. The reducer of the mobile vehicle is equipped with a pressure filter of the target model. Determine whether the magnitude of the phase current meets the preset detection requirements, which are the requirements for comparing the magnitude of the phase current in this round of detection with the magnitude of the historical phase current. If the preset testing requirements are met, the target mileage of this round of testing will be taken as the maximum service life of the pressure filter of the target model. Determining whether the phase current magnitude meets the preset detection requirements includes: Acquire multiple sets of historical phase currents from the historical rounds adjacent to the current round of detection, with each set of historical phase currents corresponding to one historical round; A coordinate system is constructed with the kilometer length as the horizontal axis and the phase current magnitude as the vertical axis to generate phase current curves corresponding to the phase current detected in this round and the multiple sets of historical phase currents. For each phase current curve, select the segment of the phase current curve located at the end position as the target phase current curve and determine the curve coefficient of the target phase current curve. When the curve coefficient of the target phase current curve is within the preset coefficient range, the phase current magnitude is determined to meet the preset detection requirements.

2. The method according to claim 1, characterized in that, The electric pump in the control reducer outputs oil according to multiple preset flow rates, and the phase current of the electric pump at different preset flow rates includes: Select the target traffic from the traffic sequences corresponding to the multiple preset traffic flows; When the oil temperature of the reducer reaches the preset oil temperature range, the electric pump is controlled to output oil at the target flow rate; When the phase current is stable, the phase current at this time is taken as the phase current at the target flow rate; Select the next flow rate from the flow rate sequence as the new target flow rate, and return to the step of controlling the electric pump to output oil at the target flow rate.

3. The method according to claim 1, characterized in that, After determining whether the phase current magnitude meets the preset detection requirements, the method further includes: If the preset detection requirements are not met, the target mileage for the next round of detection is determined. When the mobile vehicle travels to the target mileage for the next round of detection, the process returns to the step of controlling the electric pump in the reducer to output oil at multiple preset flow rates.

4. The method according to claim 1, characterized in that, Before obtaining the phase current magnitude of the electric pump at different preset flow rates by outputting oil according to multiple preset flow rates in the control reducer, the following steps are also included: Multiple preset flow ranges are defined, and the multiple preset flow ranges cover the entire flow range of the electric pump; For each set flow range, select at least one preset flow rate from that set flow range.

5. The method according to claim 2, characterized in that, The preset oil temperature range is 55°C to 90°C.

6. The method according to claim 2, characterized in that, The multiple flows in the flow sequence are arranged in ascending order of their numerical values.

7. A device for determining the service life of a pressure filter, characterized in that, include: The phase current acquisition module is used to control the electric pump in the reducer to output oil at multiple preset flow rates when the mobile vehicle travels to the target mileage of the current test, and to acquire the phase current of the electric pump at different preset flow rates. The reducer of the mobile vehicle is equipped with a pressure filter of the target model. The current judgment module is used to determine whether the phase current magnitude meets the preset detection requirements, which are the requirements for the comparison results between the phase current magnitude in the current detection and the historical phase current magnitude. The lifespan determination module is used to determine the target mileage of the current test as the maximum lifespan of the pressure filter of the target model if the preset test requirements are met. The current determination module is specifically used for: Acquire multiple sets of historical phase currents from the historical rounds adjacent to the current round of detection, with each set of historical phase currents corresponding to one historical round; A coordinate system is constructed with the kilometer length as the horizontal axis and the phase current magnitude as the vertical axis to generate phase current curves corresponding to the phase current detected in this round and the multiple sets of historical phase currents. For each phase current curve, select the segment of the phase current curve located at the end position as the target phase current curve and determine the curve coefficient of the target phase current curve. When the curve coefficient of the target phase current curve is within the preset coefficient range, the phase current magnitude is determined to meet the preset detection requirements.

8. An electronic device, characterized in that, include: The device includes a processor, a storage medium, and a bus, wherein the storage medium stores machine-readable instructions executable by the processor, and when the electronic device is in operation, the processor communicates with the storage medium via the bus, and the processor executes the machine-readable instructions to perform the steps of the method for determining the service life of a pressure filter as described in any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, performs the steps of the method for determining the service life of a pressure filter as described in any one of claims 1 to 6.

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