Engine bearing bush wear verification method and device, vehicle and storage medium

Abstract

The invention relates to an engine bearing bush abrasion verification method and device, a vehicle and a storage medium. The method comprises the steps that vibration road spectrum information is obtained; performing a vibration rack test on the to-be-tested engine bearing bush based on the vibration road spectrum information, and determining an oil film level grade; performing cycle test on the engine bearing bush to be tested based on the oil film level grade, and determining the abrasion loss; and determining bearing bush abrasion verification information according to the abrasion loss. According to the embodiment of the invention, the abrasion verification test can be effectively performed on the engine bearing bush, the abrasion condition of the engine bearing bush is identified, and the engine is prevented from generating faults due to the engine bearing bush.

Description

Technical Field

[0001] The present application relates to the technical field of engine bearings, and in particular to an engine bearing wear verification method, an engine bearing wear verification device, a vehicle, and a computer-readable storage medium. Background Art

[0002] If a vehicle's engine is left idle for an extended period, lubricating oil can backflow from the various friction pairs into the oil pan. Restarting the engine can exacerbate wear on friction pairs like bearings, leading to failures. A method for verifying engine bearing wear is urgently needed to effectively detect engine wear and prevent failures. Summary of the Invention

[0003] One of the purposes of this application is to provide a method for verifying engine bearing wear to solve the problem in the prior art of lack of detection of engine wear, which leads to engine failure; the second purpose is to provide an engine bearing wear verification device; the third purpose is to provide a vehicle; and the fourth purpose is to provide a computer-readable storage medium.

[0004] In order to achieve the above objectives, the technical solutions adopted in this application are as follows:

[0005] In a first aspect of the present application, an embodiment of the present application provides a method for verifying engine bearing wear, comprising:

[0006] Obtain vibration road spectrum information;

[0007] Performing a vibration bench test on the bearing of the engine to be tested based on the vibration road spectrum information to determine the oil film level;

[0008] Performing a cyclic test on the bearing bush of the engine to be tested based on the oil film level to determine the amount of wear;

[0009] Bearing wear verification information is determined based on the wear amount.

[0010] Optionally, the step of performing a vibration bench test on the bearing of the engine to be tested based on the vibration road spectrum information to determine the oil film level includes:

[0011] Converting the vibration spectrum information into an amplitude signal;

[0012] A vibration table test is performed based on the amplitude signal to determine the oil film level.

[0013] Optionally, the step of performing a cyclic test on the bearing bush of the engine to be tested based on the oil film level to determine the wear amount includes:

[0014] Repeating the steps of setting the oil film of the engine bearing to be tested to the oil film level and testing the set engine bearing to be tested based on a preset test cycle condition until the number of tests reaches a cycle value;

[0015] Detect the wear amount of the engine bearing after the test.

[0016] Optionally, the step of detecting the wear amount of the bearing bush of the engine to be tested after the test includes:

[0017] detecting the thickness of the bearing bush of the engine to be tested after the test;

[0018] The amount of wear is determined based on the thickness.

[0019] Optionally, the step of determining bearing wear verification information based on the wear amount includes:

[0020] When the wear amount is greater than a preset wear threshold, determining that the bearing wear verification information is in a wear failure state;

[0021] When the wear amount is not greater than a preset wear threshold, it is determined that the bearing wear verification information is in a normal wear state.

[0022] Optionally, the vibration road spectrum information is generated by the following steps:

[0023] When the vehicle is in driving condition, detect the engine posture information;

[0024] Converting the engine posture information into displacement power spectrum density;

[0025] The displacement power spectrum densities are combined to generate vibration road spectrum information.

[0026] Optionally, before the step of performing a vibration bench test on the bearing of the engine to be tested based on the vibration road spectrum information to determine the oil film level, the method further includes:

[0027] Detect the operating status of the bearing of the engine to be tested;

[0028] In response to the bearing pad operating state being an abnormal state, bearing pad failure information is generated.

[0029] In a second aspect of the present application, an embodiment of the present application provides an engine bearing wear verification device, comprising:

[0030] Acquisition module, used to obtain vibration road spectrum information;

[0031] A vibration test module, configured to perform a vibration bench test on the bearing of the engine to be tested based on the vibration road spectrum information to determine the oil film level;

[0032] A wear test module, configured to perform a cyclic test on the bearing of the engine to be tested based on the oil film level to determine the amount of wear;

[0033] The verification module is used to determine the bearing wear verification information based on the wear amount.

[0034] In the third aspect of the present application, an embodiment of the present application provides a vehicle, including a processor, a memory, and a computer program stored in the memory and capable of running on the processor, and when the computer program is executed by the processor, the steps of the engine bearing wear verification method as described above are implemented.

[0035] In a fourth aspect of the present application, an embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the engine bearing wear verification method as described above are implemented.

[0036] Beneficial effects of this application:

[0037] The embodiment of the present application obtains vibration road spectrum information; performs a vibration bench test on the engine bearing to be tested based on the vibration road spectrum information to determine the oil film level grade; performs a cyclic test on the engine bearing to be tested based on the oil film level grade to determine the wear amount; determines the bearing wear verification information based on the wear amount; performs a vibration bench test by simulating user usage conditions based on the vibration road spectrum information to determine the oil film level grade of the engine, so that the lubrication status of the engine bearing when the engine is deployed on the vehicle but has not been started for a long time can be accurately understood, and then a cyclic test is performed based on the lubrication status, from which the wear condition of restarting after a long period of non-starting can be fitted and simulated, the actual wear amount can be effectively detected, the bearing wear verification information can be determined, and the engine failure caused by damage to the engine bearing due to long-term non-starting or restarting can be avoided, thereby improving the reliability of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a flowchart of an embodiment of a method for verifying engine bearing wear according to the present application;

[0039] Figure 2 This is a flowchart of another embodiment of an engine bearing wear verification method of the present application;

[0040] Figure 3 A schematic diagram of vibration spectrum information of this application;

[0041] Figure 4 This is a schematic diagram of an oil film level grade of the present application;

[0042] Figure 5A flowchart illustrating an example of a method for verifying engine bearing wear according to the present application;

[0043] Figure 6 This is a structural block diagram of an embodiment of an engine bearing wear verification device of the present application;

[0044] Figure 7 A schematic diagram of a vehicle embodiment of the present application;

[0045] Figure 8 A schematic diagram of an embodiment of a computer storage medium of the present application. DETAILED DESCRIPTION

[0046] The following will describe the embodiments of the present application with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand the other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be understood that the preferred embodiments are only for the purpose of illustrating the present application and are not intended to limit the scope of protection of the present application.

[0047] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. Therefore, the illustrations only show components related to the present application and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0048] With the rapid development of new energy vehicles, DHE engines (dedicated hybrid engines) are becoming increasingly important as the core energy source for emerging automotive powertrains. They can meet diverse market demands, supporting various hybrid technologies such as HEV (Hybrid Electric Vehicle), PHEV (Plug-in Hybrid Electric Vehicle), and REEV (Range-Extended Electric Vehicle), satisfying diverse consumer demands for vehicle space, performance, and range.

[0049] When DHE engines are installed in hybrid vehicles, users generally choose to drive purely on electric power. Charging is typically done at charging stations, which directly leads to reduced engine usage. This leads to prolonged periods of engine inactivity, which is particularly noticeable. Furthermore, compared to fuel-powered vehicles, DHE engine-equipped vehicles have a faster startup rate. Furthermore, hybrid vehicles often operate purely on electric power for extended periods, leading to engine oil backflow. This can exacerbate wear on friction pairs such as bearings during startup, potentially causing engine lock and other damage.

[0050] Currently, there are no patents related to verifying the wear of friction pairs when starting a DHE engine. A high proportion of users of plug-in hybrid vehicles use pure electric operation. When the engine is started after a long period of non-operation, there is a risk of abnormal wear of the bearings. In severe cases, it can lead to consequences such as engine locking, resulting in malfunctions. For this reason, an embodiment of the present application is described, which simulates the oil film state of the friction pairs after the engine vibrates with the whole vehicle and does not start the engine for a long time, in order to verify the wear of the main friction pairs of the DHE engine under cyclic starting conditions under the vehicle starting strategy. It solves the problem of engine damage caused by rapid starting of the current DHE engine after a long period of non-starting.

[0051] Reference Figure 1 , shows a flowchart of an embodiment of a method for verifying engine bearing wear according to the present invention. The method for verifying engine bearing wear may specifically include the following steps:

[0052] Step 101, obtaining vibration road spectrum information;

[0053] In the embodiment of the present application, wear detection can be performed on engine bearings of various types of engines, including but not limited to hybrid-specific engines, such as parallel hybrid, series-parallel hybrid, plug-in hybrid, and other types of vehicles with multiple engines involved in transmission.

[0054] The vibration road spectrum information corresponding to the road on which the vehicle is driving on a daily basis can be obtained. The vibration road spectrum information is represented by the power spectrum density curve of the road surface roughness, which is used to describe the degree of deviation of the road surface from the ideal plane and its statistical characteristics. Road surface roughness refers to the vertical displacement deviation of the road surface from the ideal plane, which is used to measure the smoothness of the road surface. The power spectrum density curve converts the time history (or spatial history) of the road surface roughness into the frequency domain through Fourier transform, and uses power spectrum density (PSD) to represent the energy distribution of different frequency components. The horizontal axis is the spatial frequency (the number of waves within a unit distance) or the time frequency, and the vertical axis is the power spectrum density value, which reflects the intensity of the road surface excitation.

[0055] Step 102 , performing a vibration bench test on the bearing of the engine to be tested based on the vibration road spectrum information to determine the oil film level;

[0056] Vibration road spectrum information can be used as the test bench input to simulate the vibration of the vehicle during driving, and the engine bearing to be tested can be tested on the vibration bench. The oil film level can be determined based on the oil film distribution on the engine bearing to be tested after vibration.

[0057] Step 103, performing a cyclic test on the bearing bush of the engine to be tested based on the oil film level to determine the wear amount;

[0058] The oil film level grade can be used as the oil film adhesion condition when testing the engine bearing to be tested. The engine bearing to be tested is subjected to a cyclic test based on the oil film adhesion condition to determine the wear amount of the engine bearing to be tested after the cyclic test.

[0059] Step 104: determining bearing wear verification information based on the wear amount.

[0060] The amount of wear can be used to determine whether the use requirements are met, and then generate bearing wear verification information.

[0061] The embodiment of the present application obtains vibration road spectrum information; performs a vibration bench test on the engine bearing to be tested based on the vibration road spectrum information to determine the oil film level grade; performs a cyclic test on the engine bearing to be tested based on the oil film level grade to determine the wear amount; determines the bearing wear verification information based on the wear amount; performs a vibration bench test by simulating user usage conditions based on the vibration road spectrum information to determine the oil film level grade of the engine, so that the lubrication status of the engine bearing when the engine is deployed on the vehicle but has not been started for a long time can be accurately understood, and then a cyclic test is performed based on the lubrication status, from which the wear condition of restarting after a long period of non-starting can be fitted and simulated, the actual wear amount can be effectively detected, the bearing wear verification information can be determined, and the engine failure caused by damage to the engine bearing due to long-term non-starting or restarting can be avoided, thereby improving the reliability of the engine.

[0062] Reference Figure 2 , shows a flowchart of another embodiment of the engine bearing wear verification method of the present invention. The engine bearing wear verification method may specifically include the following steps:

[0063] Step 201, detecting the operating status of the bearing of the engine to be tested;

[0064] Before conducting a wear test, the operating status of the engine bearing to be tested can be detected and the bearing operating status can be generated to determine whether the engine bearing to be tested has failed. The operating status of the engine bearing to be tested can be detected in a variety of different ways, including but not limited to the following methods: 1. Appearance inspection method; Direct observation: After disassembling the engine, check the bearing surface; Normal state: The surface is smooth with uniform oil film marks (light yellow or silver-gray). Fault characteristics: Wear: The surface is rough, with scratches or strains (caused by direct metal contact). Ablation: Local bluing, blackening or melting (high temperature causes the oil film to rupture). Spalling: The alloy layer falls off, exposing the base metal. Fatigue cracks: Small cracks appear on the surface (caused by long-term alternating loads). 2. Clearance measurement method; The bearing clearance refers to the fit clearance between the engine bearing to be tested and the journal of the engine crankshaft, which is divided into radial clearance and axial clearance. Method for measuring radial clearance: Measure the journal diameter with a micrometer, measure the bearing inner diameter with an inside diameter dial indicator, and calculate the difference. Standard value: Typically 0.8% to 1.5% of the journal diameter. Excessive clearance causes vibration and abnormal noise, while too small a clearance can cause bearing burnout. Axial clearance is measured by measuring the crankshaft's axial play with a feeler gauge. Standard value: Generally no more than 0.15 to 0.30 mm. The operating condition of the bearing is determined based on the numerical values ​​of axial and radial clearance. Oil analysis indirectly determines bearing wear by analyzing metal abrasive particles and additive consumption in the lubricant. Test indicators: Copper and lead content: These are the main components of the bearing alloy layer (such as babbitt alloy); increased levels indicate bearing wear. Iron content: This reflects crankshaft or connecting rod wear. Viscosity and acid value: These assess the degree of lubricant performance degradation. This can be determined by sampling the lubricant for component analysis or using a portable oil tester. 4. Vibration analysis: Bearing failure causes changes in engine vibration frequency and amplitude. Sensors collect the vibration signal and analyze the spectrum. Characteristic frequency: Bearing wear results in vibration energy concentrated in the low frequency range (100 to 1000 Hz). The bearing is loose and a high-frequency impact component (>1000Hz) appears. 5. Temperature monitoring method: bearing failure (such as ablation) will cause a sharp increase in local temperature. Use an infrared thermometer to measure the surface temperature of the bearing non-contact. The embedded temperature sensor is directly installed in the bearing or lubricating oil channel. When the temperature exceeds the alarm value and there is a fault, the alarm value can be 120-150°C. 6. Acoustic emission detection: when the bearing is worn or peeled off, a stress wave will be generated. The signal is captured by the acoustic emission sensor, and identification is made based on the captured signal. 7. Resistance method: A conductive circuit is formed between the bearing and the journal, and wear will cause resistance changes. Install electrodes on the bearing and the journal, and measure the resistance value to determine the bearing operating status of the engine bearing to be tested. 8. Ultrasonic detection method: Use the propagation characteristics of ultrasonic waves in the bearing material to detect internal defects (such as cracks and delamination).

[0065] Step 202 , in response to the bearing bush operating state being an abnormal state, generating bearing bush failure information;

[0066] If the bearing is operating abnormally, it indicates that the bearing of the current engine under test has failed and subsequent testing cannot be performed. In response to the bearing operating abnormality, a bearing failure message can be generated. This bearing failure message alerts relevant personnel that the bearing of the current engine under test has failed and needs to be replaced, thereby accelerating testing efficiency, reducing errors, and providing timely notifications to relevant personnel.

[0067] Step 203: in response to the bearing being in a normal operating state, obtaining vibration road spectrum information;

[0068] If the bearing is in normal operation, it indicates that the bearing of the engine under test is operating normally and subsequent tests can be performed. Vibration spectrum information can be obtained.

[0069] In an optional embodiment of the present application, the vibration road spectrum information is generated by the following steps: when the vehicle is in a driving condition, detecting the engine posture information; converting the engine posture information into a displacement power spectrum density; and combining the displacement power spectrum density to generate the vibration road spectrum information.

[0070] Since the engine is not started for a long time and runs with the whole vehicle, during daily driving, the bumps and vibrations caused by users experiencing various road surfaces are transmitted to the engine. In addition, the usage habits of DHE engine users are mainly pure electric operation, and they rarely start the engine. As a result, the oil in the main oil channel of the engine flows back to the oil pan, bearings and other friction pairs, and the oil becomes a thinner oil film after long-term vibration. Based on the above reasons, the vibration road spectrum used for road tests simulating user road conditions can be collected to generate vibration road spectrum information. The engine posture information can be detected when the vehicle is in driving condition, that is, during vehicle driving. The engine posture information is used to characterize the posture of the engine when the vehicle is driving. It can be obtained by installing multiple different vibration acceleration sensors on the engine for detection. For example, as shown in Table 1, a corresponding number of vibration acceleration sensors can be installed at multiple different positions.

[0071]

[0072] Table 1

[0073] After installing the accelerometer, you can conduct tests based on the vehicle's road conditions. To ensure that the road conditions reflect the user's actual driving conditions, test the vehicle's road conditions and loading conditions as shown in Table 2. P1 represents the vehicle's Pascal Road Test Phase 1 cycle; P2 represents the vehicle's Pascal Road Test Phase 2 cycle. For specific data, refer to Table 3. The average daily mileage for the vehicle user is 75 km. Based on the actual road test conditions, 30% of the first phase and 70% of the second phase were selected.

[0074] serial number Working conditions line Number of cycles Loading 1 Full cycle P1-P2 1 Half load + full load 2 Strengthening the road surface / 1 Half load + full load 3 Comprehensive evaluation road / 1 Half load + full load

[0075] Table 2

[0076]

[0077] Table 3

[0078] After the engine posture information is detected, the engine posture information is converted into displacement power spectrum density based on the engine posture change, and the displacement power spectrum density is combined to generate vibration road spectrum information. For example, the vibration road spectrum information can refer to Figure 3 ,With the driving path, the engine speed and torque change in real time, forming vibration road spectrum information.

[0079] Step 204 , performing a vibration bench test on the bearing of the engine to be tested based on the vibration spectrum information to determine the oil film level;

[0080] Vibration road spectrum information can be used to fit the engine's deployment on a vehicle. Based on this vibration profile, a vibration bench test can be performed on the engine bearing to determine the oil film level of the bearing after the test. The oil film level indicates the state of lubricant adhesion to the bearing.

[0081] In an optional embodiment of the present application, the step of performing a vibration bench test on the engine bearing to be tested based on the vibration spectrum information and determining the oil film level includes: converting the vibration spectrum information into an amplitude signal; and performing a vibration bench test based on the amplitude signal to determine the oil film level.

[0082] The intensity of the vibration spectrum information is converted into an amplitude signal on the vibration bench. The vibration bench is controlled to reach the amplitude corresponding to the amplitude signal to perform a vibration bench test on the engine bearing to be tested. After the test is completed, the corresponding oil film level is determined based on the amount of oil remaining on the engine bearing to be tested. The specific classification of the oil film level can be set according to needs, such as 5 levels, 10 top levels, etc., and this application does not limit the classification of the oil film level.

[0083] Since the method of determining the oil film level based on mass requires a balance scale or other equipment with high precision in actual processing, in order to make the embodiment of the present application more practical, for example, a visual method can be used to determine the oil film level, combined with Figure 4 According to Table 4, different oil film levels are divided into 5 oil film levels, and the corresponding visual determination methods are as follows:

[0084]

[0085] Table 4

[0086] Step 205 , performing a cyclic test on the bearing bush of the engine to be tested based on the oil film level to determine the amount of wear;

[0087] The oil film level grade is used as the initial oil film level of the engine bearing to be tested, and then the corresponding cycle test is carried out. The engine bearing to be tested after the test is measured to determine the wear amount.

[0088] In an optional embodiment of the present application, the step of performing a cyclic test on the bearing of the engine to be tested based on the oil film level to determine the wear amount includes:

[0089] Sub-step S2051, repeatedly setting the oil film of the engine bearing to be tested to the oil film level, and testing the set engine bearing to be tested based on a preset test cycle condition until the number of tests reaches a cycle value;

[0090] The oil film on the engine bearing to be tested is set to a level, and then the bearing is tested according to a preset test cycle. After a single test cycle, the oil film on the engine bearing to be tested is set to a level, and the bearing is tested according to the preset test cycle. This test process is repeated until the number of tests reaches the cycle value. The number of cycles can be determined based on demand and is not specifically limited in this embodiment. For the operation scenario of the preset test cycle, the test process can be as shown in Table 5. On the test bench, the oil film on the engine bearing is blown to the level to simulate the oil film level after the user's oil film vibration test. Then, according to the vehicle start-up and operation strategy, the vehicle is started, then shut down to blow the oil film on the bearing, and then restarted. The specific preset test cycle can be shown in Table 6. The start-up portion uses the vehicle start-up strategy to start the vehicle, with the motor driving the engine to the corresponding speed. The acceleration condition is to increase the speed to 3500 rpm after starting to simulate the acceleration process. The vehicle is then stabilized at 3500 rpm to enhance the test process.

[0091]

[0092] Table 5

[0093]

[0094] Table 6

[0095] Sub-step S2051, detecting the wear amount of the engine bearing to be tested after the test.

[0096] The size of the engine bearing after testing can be detected to determine the amount of wear.

[0097] In an optional embodiment of the present application, the step of detecting the wear amount of the engine bearing to be tested after the test includes: detecting the thickness of the engine bearing to be tested after the test; and determining the wear amount based on the thickness.

[0098] The thickness of the bearing of the engine to be tested can be detected after the test, and the wear amount can be determined based on the comparison between the current thickness and the original thickness of the bearing of the engine to be tested.

[0099] Step 206: Determine bearing wear verification information based on the wear amount.

[0100] The actual bearing wear verification information is determined based on the amount of wear, and the wear state of the engine to be tested is represented by the bearing wear verification information.

[0101] In an optional embodiment of the present application, the step of determining the bearing wear verification information based on the wear amount includes: when the wear amount is greater than a preset wear threshold, determining the bearing wear verification information as a wear failure state; when the wear amount is not greater than the preset wear threshold, determining the bearing wear verification information as a normal wear state.

[0102] The design or verification requirements can be characterized by a preset wear threshold. A wear value greater than the preset wear threshold indicates wear verification, and a wear value not greater than the preset wear threshold indicates that the wear is within the normal range. Therefore, when the wear amount is greater than the preset wear threshold, the bearing wear verification information can be determined to be in a wear failure state. The wear failure state can be used to remind relevant personnel that the bearing of the engine to be tested does not meet the requirements, so as to avoid starting the engine and causing engine failure. When the wear amount is not greater than the preset wear threshold, the bearing wear verification information can be determined to be in a normal wear state. The normal wear state can be used to remind relevant personnel that the bearing of the engine to be tested meets the requirements and the engine can be used normally.

[0103] Among them, the size of the preset wear threshold can be determined according to the design requirements of the engine, and the embodiment of the present application does not make any specific limitations on this.

[0104] The embodiment of the present application measures the operating status of the bearing; generates bearing failure information in response to the bearing operating status being an abnormal state; obtains vibration spectrum information in response to the bearing operating status being a normal state; performs a vibration bench test on the engine bearing to be tested based on the vibration spectrum information to determine the oil film level; performs a cyclic test on the engine bearing to be tested based on the oil film level to determine the amount of wear; determines bearing wear verification information based on the wear amount; before conducting the test, first determines the operating status of the bearing, and in case of failure, generates bearing failure information, and uses the bearing failure information to remind the user to pay attention to the engine bearing failure, so that the user can be notified in time to avoid aggravation of the failure during startup. By simulating user usage conditions based on vibration road spectrum information and conducting vibration bench tests, the oil film level of the engine is determined, so that the lubrication status of the engine bearings when the engine is deployed on the vehicle but has not been started for a long time can be accurately understood. Based on this lubrication status, cyclic testing can be performed to fit and simulate the wear conditions after restarting after a long period of non-starting, effectively detect the actual wear amount, determine the bearing wear verification information, avoid engine failure caused by damage to the engine bearings due to long-term non-starting or restarting, and improve engine reliability.

[0105] In order to make the implementation process of the embodiment of the present application clear to those skilled in the art, the present application uses an example to illustrate the embodiment, which can be referred to as Figure 5 , shows a flowchart of an example of an engine bearing wear verification method of the present application. It includes:

[0106] Step 501, pre-test function check: Perform a function check on the engine bearing to determine the operating status of the bearing.

[0107] Step 502: Whether the design requirements are met: If the bearing bushing operation state meets the design requirements, subsequent tests can be performed; if the bearing bushing operation state does not meet the design requirements, it indicates that the bearing bushing of the current engine to be tested has failed.

[0108] Step 503: User oil film condition vibration test: A vibration bench test is performed on the bearing of the engine to be tested based on the vibration road spectrum information to complete the user oil film condition vibration test.

[0109] Step 504: Bearing start-up wear rapid verification test. Based on the determined oil film level, a cyclic test is performed to complete the bearing start-up wear rapid verification test.

[0110] Step 505: Whether the design requirements are met. The wear amount of the engine bearing to be tested is evaluated after the test. If the wear amount is greater than a preset wear threshold, the test fails. If the wear amount is not greater than the preset wear threshold, the test passes.

[0111] Vibration sensors are placed throughout the vehicle to simulate user usage conditions and collect road vibration data. This data is then converted to vibration test bench conditions and accelerated on a six-degree-of-freedom vibration bench to simulate the effects of a user not starting the engine for an extended period, with the vehicle vibrating. Based on the oil film condition of friction pairs such as bearings obtained during this test, the oil in these friction pairs is then dried using appropriate methods on an engine test bench to achieve the same oil film level as described above. Finally, the engine is cycled using a vehicle start strategy to assess wear on the bearings and other friction pairs.

[0112] It should be noted that for the method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the embodiments of the present application are not limited by the order of the actions described, because according to the embodiments of the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily required by the embodiments of the present application.

[0113] Reference Figure 6 , shows a structural block diagram of an embodiment of an engine bearing wear verification device of the present application, the engine bearing wear verification device comprising:

[0114] Acquisition module 601, used to acquire vibration road spectrum information;

[0115] A vibration test module 602 is configured to perform a vibration bench test on the bearing of the engine to be tested based on the vibration road spectrum information to determine the oil film level;

[0116] A wear test module 603 is configured to perform a cyclic test on the bearing of the engine to be tested based on the oil film level to determine the amount of wear;

[0117] The verification module 604 is used to determine the bearing wear verification information according to the wear amount.

[0118] In an optional embodiment of the present application, the vibration test module 602 includes:

[0119] A conversion submodule, configured to convert the vibration road spectrum information into an amplitude signal;

[0120] The vibration test submodule performs a vibration bench test based on the amplitude signal to determine the oil film level.

[0121] In an optional embodiment of the present application, the wear test module 603 includes:

[0122] A test cycle submodule, configured to repeatedly execute the steps of setting the oil film of the engine bearing to be tested to the oil film level, and testing the set engine bearing to be tested based on a preset test cycle condition until the number of tests reaches a cycle value;

[0123] The wear detection submodule is used to measure the wear of the bearing of the engine to be tested after the test.

[0124] In an optional embodiment of the present application, the wear detection submodule includes:

[0125] A wear detection unit, used to detect the thickness of the engine bearing shell to be tested after the test;

[0126] A wear determination unit is configured to determine an amount of wear based on the thickness.

[0127] In an optional embodiment of the present application, the verification module 604 includes:

[0128] A first verification submodule is configured to determine that the bearing wear verification information is in a wear failure state when the wear amount is greater than a preset wear threshold;

[0129] The second verification submodule is configured to determine that the bearing wear verification information is in a normal wear state when the wear amount is not greater than a preset wear threshold.

[0130] In an optional embodiment of the present application, the vibration road spectrum information is generated by the following steps:

[0131] When the vehicle is in driving condition, detect the engine posture information;

[0132] Converting the engine posture information into displacement power spectrum density;

[0133] The displacement power spectrum densities are combined to generate vibration road spectrum information.

[0134] In an optional embodiment of the present application, the device further includes:

[0135] An operation detection module is used to detect the operation status of the bearing of the engine to be tested;

[0136] The failure determination module is configured to generate bearing failure information in response to the bearing operating state being an abnormal state.

[0137] The embodiment of the present application obtains vibration road spectrum information; performs a vibration bench test on the engine bearing to be tested based on the vibration road spectrum information to determine the oil film level grade; performs a cyclic test on the engine bearing to be tested based on the oil film level grade to determine the wear amount; determines the bearing wear verification information based on the wear amount; performs a vibration bench test by simulating user usage conditions based on the vibration road spectrum information to determine the oil film level grade of the engine, so that the lubrication status of the engine bearing when the engine is deployed on the vehicle but has not been started for a long time can be accurately understood, and then a cyclic test is performed based on the lubrication status, from which the wear condition of restarting after a long period of non-starting can be fitted and simulated, the actual wear amount can be effectively detected, the bearing wear verification information can be determined, and the engine failure caused by damage to the engine bearing due to long-term non-starting or restarting can be avoided, thereby improving the reliability of the engine.

[0138] As for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0139] Reference Figure 7 The present application also provides a vehicle, comprising: a processor 701, a memory 702, and a computer program stored in the memory and capable of running on the processor, wherein when the computer program is executed by the processor, the steps of the engine bearing wear verification method described above are implemented. The engine bearing wear verification method includes:

[0140] Obtain vibration road spectrum information;

[0141] Performing a vibration bench test on the bearing of the engine to be tested based on the vibration road spectrum information to determine the oil film level;

[0142] Performing a cyclic test on the bearing bush of the engine to be tested based on the oil film level to determine the amount of wear;

[0143] Bearing wear verification information is determined based on the wear amount.

[0144] Optionally, the step of performing a vibration bench test on the bearing of the engine to be tested based on the vibration road spectrum information to determine the oil film level includes:

[0145] Converting the vibration spectrum information into an amplitude signal;

[0146] A vibration table test is performed based on the amplitude signal to determine the oil film level.

[0147] Optionally, the step of performing a cyclic test on the bearing bush of the engine to be tested based on the oil film level to determine the wear amount includes:

[0148] Repeating the steps of setting the oil film of the engine bearing to be tested to the oil film level and testing the set engine bearing to be tested based on a preset test cycle condition until the number of tests reaches a cycle value;

[0149] Detect the wear amount of the engine bearing after the test.

[0150] Optionally, the step of detecting the wear amount of the bearing bush of the engine to be tested after the test includes:

[0151] detecting the thickness of the bearing bush of the engine to be tested after the test;

[0152] The amount of wear is determined based on the thickness.

[0153] Optionally, the step of determining bearing wear verification information based on the wear amount includes:

[0154] When the wear amount is greater than a preset wear threshold, determining that the bearing wear verification information is in a wear failure state;

[0155] When the wear amount is not greater than a preset wear threshold, it is determined that the bearing wear verification information is in a normal wear state.

[0156] Optionally, the vibration road spectrum information is generated by the following steps:

[0157] When the vehicle is in driving condition, detect the engine posture information;

[0158] Converting the engine posture information into displacement power spectrum density;

[0159] The displacement power spectrum densities are combined to generate vibration road spectrum information.

[0160] Optionally, before the step of performing a vibration bench test on the bearing of the engine to be tested based on the vibration road spectrum information to determine the oil film level, the method further includes:

[0161] Detect the operating status of the bearing of the engine to be tested;

[0162] In response to the bearing pad operating state being an abnormal state, bearing pad failure information is generated.

[0163] The embodiment of the present application obtains vibration road spectrum information; performs a vibration bench test on the engine bearing to be tested based on the vibration road spectrum information to determine the oil film level grade; performs a cyclic test on the engine bearing to be tested based on the oil film level grade to determine the wear amount; determines the bearing wear verification information based on the wear amount; performs a vibration bench test by simulating user usage conditions based on the vibration road spectrum information to determine the oil film level grade of the engine, so that the lubrication status of the engine bearing when the engine is deployed on the vehicle but has not been started for a long time can be accurately understood, and then a cyclic test is performed based on the lubrication status, from which the wear condition of restarting after a long period of non-starting can be fitted and simulated, the actual wear amount can be effectively detected, the bearing wear verification information can be determined, and the engine failure caused by damage to the engine bearing due to long-term non-starting or restarting can be avoided, thereby improving the reliability of the engine.

[0164] The memory may include random access memory (RAM) or non-volatile memory, such as at least one disk storage. Alternatively, the memory may be at least one storage device located away from the processor.

[0165] The above-mentioned processor can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, and discrete hardware components.

[0166] Reference Figure 8 The present application also provides a computer-readable storage medium 801, which stores a computer program. When the computer program is executed by a processor, the steps of the engine bearing wear verification method described in any one of the embodiments of the present application are executed. The engine bearing wear verification method includes:

[0167] Obtain vibration road spectrum information;

[0168] Performing a vibration bench test on the bearing of the engine to be tested based on the vibration road spectrum information to determine the oil film level;

[0169] Performing a cyclic test on the bearing bush of the engine to be tested based on the oil film level to determine the amount of wear;

[0170] Bearing wear verification information is determined based on the wear amount.

[0171] Optionally, the step of performing a vibration bench test on the bearing of the engine to be tested based on the vibration road spectrum information to determine the oil film level includes:

[0172] Converting the vibration spectrum information into an amplitude signal;

[0173] A vibration table test is performed based on the amplitude signal to determine the oil film level.

[0174] Optionally, the step of performing a cyclic test on the bearing bush of the engine to be tested based on the oil film level to determine the wear amount includes:

[0175] Repeating the steps of setting the oil film of the engine bearing to be tested to the oil film level and testing the set engine bearing to be tested based on a preset test cycle condition until the number of tests reaches a cycle value;

[0176] Detect the wear amount of the engine bearing after the test.

[0177] Optionally, the step of detecting the wear amount of the bearing bush of the engine to be tested after the test includes:

[0178] detecting the thickness of the bearing bush of the engine to be tested after the test;

[0179] The amount of wear is determined based on the thickness.

[0180] Optionally, the step of determining bearing wear verification information based on the wear amount includes:

[0181] When the wear amount is greater than a preset wear threshold, determining that the bearing wear verification information is in a wear failure state;

[0182] When the wear amount is not greater than a preset wear threshold, it is determined that the bearing wear verification information is in a normal wear state.

[0183] Optionally, the vibration road spectrum information is generated by the following steps:

[0184] When the vehicle is in driving condition, detect the engine posture information;

[0185] Converting the engine posture information into displacement power spectrum density;

[0186] The displacement power spectrum densities are combined to generate vibration road spectrum information.

[0187] Optionally, before the step of performing a vibration bench test on the bearing of the engine to be tested based on the vibration road spectrum information to determine the oil film level, the method further includes:

[0188] Detect the operating status of the bearing of the engine to be tested;

[0189] In response to the bearing pad operating state being an abnormal state, bearing pad failure information is generated.

[0190] The embodiment of the present application obtains vibration road spectrum information; performs a vibration bench test on the engine bearing to be tested based on the vibration road spectrum information to determine the oil film level grade; performs a cyclic test on the engine bearing to be tested based on the oil film level grade to determine the wear amount; determines the bearing wear verification information based on the wear amount; performs a vibration bench test by simulating user usage conditions based on the vibration road spectrum information to determine the oil film level grade of the engine, so that the lubrication status of the engine bearing when the engine is deployed on the vehicle but has not been started for a long time can be accurately understood, and then a cyclic test is performed based on the lubrication status, from which the wear condition of restarting after a long period of non-starting can be fitted and simulated, the actual wear amount can be effectively detected, the bearing wear verification information can be determined, and the engine failure caused by damage to the engine bearing due to long-term non-starting or restarting can be avoided, thereby improving the reliability of the engine.

[0191] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to in detail.

[0192] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, devices, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0193] The embodiments of the present application are described with reference to the flowcharts and / or block diagrams of the methods, terminal devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing terminal device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing terminal device generate instructions for implementing the steps in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0194] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing terminal device to operate in a specific manner, so that the instructions stored in the computer readable memory produce a manufactured product including an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0195] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal device so that a series of operating steps are executed on the computer or other programmable terminal device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable terminal device to implement the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0196] The above embodiments are only preferred embodiments for fully illustrating the present application, and the protection scope of the present application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art based on the present application are within the protection scope of the present application.

Claims

1. A method for verifying engine bearing wear, characterized in that: include: Obtain vibration road spectrum information; Performing a vibration bench test on the bearing of the engine to be tested based on the vibration road spectrum information to determine the oil film level; Performing a cyclic test on the bearing bush of the engine to be tested based on the oil film level to determine the amount of wear; Bearing wear verification information is determined based on the wear amount.

2. The method according to claim 1, characterized in that The step of performing a vibration bench test on the bearing of the engine to be tested based on the vibration road spectrum information to determine the oil film level includes: Converting the vibration spectrum information into an amplitude signal; A vibration table test is performed based on the amplitude signal to determine the oil film level.

3. The method according to claim 1, characterized in that The step of performing a cyclic test on the bearing bush of the engine to be tested based on the oil film level to determine the wear amount includes: Repeating the steps of setting the oil film of the engine bearing to be tested to the oil film level and testing the set engine bearing to be tested based on a preset test cycle condition until the number of tests reaches a cycle value; Detect the wear amount of the engine bearing after the test.

4. The method according to claim 3, characterized in that The step of detecting the wear amount of the bearing bush of the engine to be tested after the test comprises: detecting the thickness of the bearing bush of the engine to be tested after the test; The amount of wear is determined based on the thickness.

5. The method according to claim 1, wherein The step of determining bearing wear verification information based on the wear amount includes: When the wear amount is greater than a preset wear threshold, determining that the bearing wear verification information is in a wear failure state; When the wear amount is not greater than a preset wear threshold, it is determined that the bearing wear verification information is in a normal wear state.

6. The method according to claim 1, characterized in that The vibration road spectrum information is generated by the following steps: When the vehicle is in driving condition, detect the engine posture information; Converting the engine posture information into displacement power spectrum density; The displacement power spectrum densities are combined to generate vibration road spectrum information.

7. The method according to claim 1, characterized in that Before the step of performing a vibration bench test on the bearing of the engine to be tested based on the vibration road spectrum information to determine the oil film level, the method further includes: Detect the operating status of the bearing of the engine to be tested; In response to the bearing pad operating state being an abnormal state, bearing pad failure information is generated.

8. An engine bearing wear verification device, characterized in that: include: Acquisition module, used to obtain vibration road spectrum information; A vibration test module, configured to perform a vibration bench test on the bearing of the engine to be tested based on the vibration road spectrum information to determine the oil film level; A wear test module, configured to perform a cyclic test on the bearing of the engine to be tested based on the oil film level to determine the amount of wear; The verification module is used to determine the bearing wear verification information based on the wear amount.

9. A vehicle, characterized in that: The method comprises a processor, a memory and a computer program stored in the memory and capable of running on the processor, wherein when the computer program is executed by the processor, the steps of the engine bearing wear verification method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the engine bearing wear verification method according to any one of claims 1 to 7 are implemented.

Images