Method and device for predicting service life of silicone oil damper of vehicle and engine and medium

Abstract

The invention discloses a service life prediction method and device for a vehicle and an engine silicone oil damper and a medium, and the service life prediction method for the engine silicone oil damper comprises the steps: obtaining the service life of an external characteristic rated point of the damper in a rack endurance test environment; wherein the service life of the external characteristic rated point is the service life of the shock absorber when the engine is at the highest rotating speed and the highest load rate; acquiring a road actual measurement load spectrum of the shock absorber; determining the actual damage value of the shock absorber according to the actually measured load spectrum of the road and the service life of the external characteristic rated point; the actual damage value is the damage value of the shock absorber during the road spectrum acquisition period; and predicting the service life of the shock absorber under the road working condition according to the actual damage value and the driving mileage during the road spectrum acquisition period. According to the technical scheme, accurate prediction of the service life mileage of the shock absorber under the road working condition can be realized based on the torsional vibration test working condition and the actually measured road spectrum, so that reliability evaluation of the shock absorber after the torsional vibration test is guided.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a life prediction method, device and medium for a silicone oil shock absorber of a vehicle and an engine. Background Art

[0002] As fuel consumption and emission regulations in the automotive industry become increasingly stringent, the explosion pressure in the cylinder of the engine continues to increase, which brings great challenges to the reliability of the entire shaft system. The silicone oil shock absorber is installed at the front end of the engine crankshaft. It uses the viscous damping force of silicone oil generated by the relative torsion between the inertia ring and the housing to consume vibration energy, thereby effectively suppressing the torsional vibration of the crankshaft. It is a key component of the whole vehicle. Ensuring the normal operation of the shock absorber is crucial to maintaining the safety and stability of vehicle operation.

[0003] However, under actual working conditions, the working environment of the shock absorber is relatively harsh. Silicone oil will deteriorate under long-term high temperature and high shear, which will reduce the stiffness and damping characteristics of the shock absorber, causing a sharp increase in the crankshaft torsional amplitude and stress, and eventually causing the crankshaft to break, seriously threatening the overall reliability of the engine. Therefore, during the engine development process, it is necessary to test the silicone oil degradation rate of the shock absorber after the bench cycle durability test to assess the durability of the shock absorber silicone oil. However, due to the lack of the relationship between the silicone oil degradation rate and the life of the shock absorber under actual road conditions, it is impossible to accurately predict the actual durability of the shock absorber.

[0004] At present, there are two existing methods for predicting the life of shock absorbers: 1. Monitor the damping state of the shock absorber. When it is not in an over-damped state, the shock absorber is considered to have failed. However, since most shock absorbers are designed to work in an over-damped state, even if the shock absorber is not in an over-damped state, its failure cannot be effectively determined. Therefore, this life prediction method can only determine whether the shock absorber has failed, but cannot accurately predict the remaining life of the shock absorber. 2. Install the silicone oil shock absorber on the vehicle test bench, load it a certain number of times to make it fail, and then count the maximum number of loads. However, the constantly changing working conditions during actual use will affect the performance of the silicone oil shock absorber and change the degree of attenuation of its remaining life. In addition, the test bench is usually unable to fully simulate the various operating conditions of the vehicle, so this prediction method is not accurate. Summary of the invention

[0005] The present invention provides a life prediction method, device and medium for silicone oil shock absorbers of vehicles and engines to solve the problems existing in the prior art. It can accurately predict the life mileage of the shock absorber under road conditions based on torsional vibration test conditions and measured road spectra, thereby guiding the reliability evaluation of the shock absorber after torsional vibration testing.

[0006] In a first aspect, the present invention provides a life prediction method for an engine silicone oil damper, comprising:

[0007] Obtaining the rated point life of the external characteristics of the shock absorber under the bench durability test environment; wherein the rated point life of the external characteristics is the life of the shock absorber when the engine is at the highest speed and the highest load rate;

[0008] Obtaining a road measured load spectrum of the shock absorber;

[0009] Determine the actual damage value of the shock absorber according to the measured road load spectrum and the rated point life of the external characteristic; the actual damage value is the damage value of the shock absorber during the road spectrum collection period;

[0010] The life of the shock absorber under road conditions is predicted based on the actual damage value and the mileage during the road spectrum collection period.

[0011] Optionally, obtaining the rated point life of the external characteristics of the shock absorber under a bench durability test environment includes:

[0012] Performing a torsional vibration test on the vibration absorber to obtain a torsional vibration subharmonic curve of the vibration absorber; wherein the torsional vibration subharmonic curve is used to describe the corresponding relationship between the torsional vibration amplitude of the vibration absorber and the rotation speed of the engine at multiple preset harmonics;

[0013] Performing a bench durability test on the shock absorber and obtaining a test damage value of the shock absorber; wherein the test damage value is a damage value of the shock absorber after the bench durability test;

[0014] Based on the torsional vibration subharmonic curve and the test damage value, the external characteristic rated point life of the shock absorber under the bench durability test environment is determined.

[0015] Optionally, performing a torsional vibration test on the vibration absorber to obtain a torsional vibration subharmonic curve of the vibration absorber includes:

[0016] After the engine runs to a stable state under rated conditions, the engine is smoothly operated from a maximum speed point to a minimum speed point within a preset time period, and the torsional vibration characteristics of the shock absorber are obtained to form a torsional vibration subharmonic curve.

[0017] Optionally, determining the rated point life of the external characteristic of the shock absorber under the bench durability test environment based on the torsional vibration subharmonic curve and the test damage value includes:

[0018] Based on the torsional vibration subharmonic curve, determining the relationship between the total damage value of the vibration absorber and the rated point life of the external characteristic;

[0019] The external characteristic rated point life is determined according to the relationship between the test damage value and the total damage value of the shock absorber and the external characteristic rated point life.

[0020] Optionally, determining the relationship between the total damage value of the shock absorber and the rated point life of the external characteristic based on the torsional vibration subharmonic curve includes:

[0021] Based on the torsional vibration subharmonic curve, determining the relationship between the life of the shock absorber at any operating point and the life at the rated point of the external characteristic;

[0022] According to the relationship between the life of the shock absorber at any operating point and the life at the rated point of the external characteristic, the relationship between the total damage value of the shock absorber and the life at the rated point of the external characteristic is determined.

[0023] Optionally, determining the actual damage value of the shock absorber according to the road measured load spectrum and the rated point life of the external characteristic of the shock absorber includes:

[0024] Based on the measured road load spectrum and in combination with the relationship between the life of the shock absorber at any operating point and the life at the rated point of the external characteristic, determining the damage coefficient matrix of the shock absorber during the road spectrum collection period;

[0025] The actual damage value of the shock absorber is determined according to the damage coefficient matrix and the external characteristic rated point life of the shock absorber.

[0026] Optionally, predicting the life of the shock absorber under road conditions according to the actual damage value and the mileage during the road spectrum collection period includes:

[0027] According to the actual damage value and the mileage during the road spectrum collection period, based on the first formula, the life of the shock absorber under road conditions is predicted; wherein the first formula is as follows:

[0028]

[0029] Wherein, L is the life of the shock absorber under road conditions, l is the mileage during the road spectrum collection period, and D i,j * is the damage value at any operating point during the road spectrum acquisition.

[0030] In a second aspect, the present invention provides a life prediction device for an engine silicone oil damper, comprising:

[0031] An external characteristic rated point life acquisition module, used to acquire the external characteristic rated point life of the shock absorber under a bench durability test environment;

[0032] A road measured load spectrum acquisition module, used to acquire the road measured load spectrum of the shock absorber;

[0033] An actual damage value determination module is used to determine the actual damage value of the shock absorber according to the road measured load spectrum and the rated point life of the external characteristic; the actual damage value is the damage value of the shock absorber during the road spectrum collection period;

[0034] The life prediction module is used to predict the life of the shock absorber under road conditions according to the actual damage value and the mileage during the road spectrum collection period.

[0035] In a third aspect, the present application provides a vehicle, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the life prediction method of the engine silicone oil damper described in any one of the above items.

[0036] In a fourth aspect, the present application provides a computer-readable storage medium storing computer instructions, wherein the computer instructions are used to implement any of the above-mentioned engine silicone oil damper life prediction methods when executed by a processor.

[0037] The technical solution of the present invention obtains the external characteristic rated point life of the shock absorber under a bench durability test environment and the road measured load spectrum of the shock absorber, and determines the actual damage value of the shock absorber based on the road measured load spectrum and the external characteristic rated point life, thereby predicting the life of the shock absorber under road conditions based on the actual damage value and the mileage during the road spectrum acquisition period, so that based on the torsional vibration test conditions and the measured road spectrum, it is possible to accurately predict the life mileage of the shock absorber under complex road conditions, thereby guiding the reliability evaluation of the shock absorber after the torsional vibration test.

[0038] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0040] Figure 1 A flow chart of a method for predicting the life of an engine silicone oil shock absorber provided in the first embodiment of the present invention;

[0041] Figure 2 A flow chart of a method for predicting the life of an engine silicone oil shock absorber provided in the second embodiment of the present invention;

[0042] Figure 3A flowchart of a method for predicting the life of an engine silicone oil shock absorber provided in Embodiment 3 of the present invention;

[0043] Figure 4 This is a schematic diagram of the structure of a life prediction device for an engine silicone oil damper provided in Embodiment 4 of the present invention. DETAILED DESCRIPTION

[0044] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0045] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein.

[0046] Embodiment 1

[0047] Figure 1 This is a flow chart of a life prediction method for an engine silicone oil shock absorber provided in the first embodiment of the present invention. This embodiment can be applied to predicting the life of the shock absorber under road conditions. The method can be executed by a life prediction device for an engine silicone oil shock absorber. The life prediction device for an engine silicone oil shock absorber can be implemented in the form of hardware and / or software. The life prediction device for an engine silicone oil shock absorber can be configured in a vehicle controller. Figure 1 As shown, the method includes:

[0048] S110. Obtain the rated point life of the external characteristics of the shock absorber under the bench durability test environment.

[0049] Among them, the external characteristic rated point life refers to the life of the shock absorber when the engine is running at the maximum speed and maximum load rate. The external characteristic rated point life of the shock absorber under the bench durability test environment can be understood as the external characteristic rated point life of the shock absorber when the bench durability test is carried out on the vehicle test bench.

[0050] In an optional embodiment, the external characteristic rated point life of the shock absorber in a bench durability test environment is determined by a vehicle test bench test.

[0051] S120: Obtain a road measured load spectrum of the shock absorber.

[0052] The road measured load spectrum of the shock absorber can be understood as the operating parameters of the engine during the actual road driving of the vehicle. In an optional embodiment, the road measured load spectrum of the shock absorber can reflect the parameters of the vehicle during the actual road driving, such as at least one of the engine speed, load rate and torsional amplitude of the shock absorber.

[0053] In an optional embodiment, the road measured load spectrum of the shock absorber may be obtained, but is not limited to, through a vehicle controller of the vehicle.

[0054] S130. Determine the actual damage value of the shock absorber according to the measured road load spectrum and the rated point life of the external characteristics.

[0055] The actual damage value is the damage value of the shock absorber during the road spectrum collection period. Specifically, the external characteristic rated point life of the shock absorber under the bench durability test environment and the road measured load spectrum of the shock absorber are obtained, and the actual damage value of the shock absorber is determined based on the road measured load spectrum and the external characteristic rated point life.

[0056] S140: predicting the life of the shock absorber under road conditions based on the actual damage value and the mileage during the road spectrum collection period.

[0057] The life of the shock absorber under road conditions can be understood as the actual life of the shock absorber when the vehicle is driving on actual roads.

[0058] Specifically, when the mileage during the road spectrum collection period is short but the actual damage value is large, it indicates that the damage value of the shock absorber per unit mileage of the vehicle is larger, and thus the life of the shock absorber under road conditions is shorter; on the contrary, when the mileage during the road spectrum collection period is long but the actual damage value is small, it indicates that the damage value of the shock absorber per unit mileage of the vehicle is smaller, and thus the life of the shock absorber under road conditions is longer.

[0059] In this embodiment, the external characteristic rated point life of the shock absorber under the bench durability test environment and the road measured load spectrum of the shock absorber are obtained, and the actual damage value of the shock absorber is determined based on the road measured load spectrum and the external characteristic rated point life. Therefore, the life of the shock absorber under road conditions is predicted based on the actual damage value and the mileage during the road spectrum acquisition period. This makes it possible to accurately predict the life mileage of the shock absorber under complex road conditions based on the torsional vibration test conditions and the measured road spectrum, thereby guiding the reliability evaluation of the shock absorber after the torsional vibration test.

[0060] Embodiment 2

[0061] Figure 2This is a flow chart of a method for predicting the life of an engine silicone oil shock absorber provided in the second embodiment of the present invention. Based on the above embodiment, this embodiment further adds steps on how to obtain the rated point life of the external characteristics of the shock absorber under the bench durability test environment, and how to predict the life of the shock absorber under road conditions based on the actual damage value and the mileage during the road spectrum acquisition period. Figure 2 As shown, the method specifically:

[0062] S210: Perform a torsional vibration test on the shock absorber to obtain a torsional vibration subharmonic curve of the shock absorber.

[0063] The torsional vibration subharmonic curve is used to describe the corresponding relationship between the torsional vibration amplitude of the vibration absorber and the engine speed at multiple preset harmonics. The torsional vibration subharmonic curve can reflect, but is not limited to, information such as the engine speed, engine load rate, and the torsional vibration amplitude of the vibration absorber at each speed point of the external characteristic, as well as the relationship between the engine speed, engine load rate, and the torsional vibration amplitude of the vibration absorber at each speed point of the external characteristic.

[0064] Optionally, S210 includes: after the engine runs to a stable state under rated operating conditions, within a preset time period, the engine is smoothly operated from a maximum speed point to a minimum speed point, and at the same time, the torsional vibration characteristics of the shock absorber are obtained to form a torsional vibration subharmonic curve.

[0065] Among them, the rated operating condition refers to the condition where the engine runs at the highest speed and the highest load rate. The stable state can be understood as a state in which various parameters remain relatively stable during the operation of the engine. By allowing the engine to run to a stable state under the rated operating condition and then performing a torsional vibration test, the accuracy of the torsional vibration test can be improved, thereby improving the accuracy of the predicted life of the shock absorber. In an exemplary embodiment, the stable state refers to the water temperature and oil temperature of the engine meeting the test requirements, the silicone oil temperature and torsional vibration performance of the shock absorber meeting the test requirements, and the engine running at the rated operating condition for more than 30 minutes. The preset time period is a deceleration time period converted according to the deceleration required by the torsional vibration test. The torsional vibration characteristics of the shock absorber refer to the torsional vibration amplitude of the engine at different speeds and different load rates.

[0066] In an exemplary embodiment, a torsional vibration test device is first installed on the pulley at the front end of the engine crankshaft to track and measure the torsional vibration characteristics of the engine. The torsional vibration test device may include, but is not limited to, a digital collector, a photoelectric encoder, and an infrared temperature measuring gun. In an exemplary embodiment, the surface of the shock absorber may also be sprayed with black paint to improve the accuracy of the temperature data collected by the infrared temperature measuring gun. Then start the engine and gradually increase the engine's operating load rate until the engine runs to the rated operating condition. Keep the engine running at the rated operating condition for more than 30 minutes, monitor the engine's water outlet temperature and oil temperature, as well as the silicone oil temperature and torsional vibration characteristics of the shock absorber, and perform a torsional vibration test after the engine's water outlet temperature and oil temperature, as well as the silicone oil temperature and torsional vibration characteristics of the shock absorber meet the test requirements.

[0067] S220. Perform a bench durability test on the shock absorber and obtain a test damage value of the shock absorber.

[0068] The test damage value is the damage value of the shock absorber after the bench durability test. In an optional embodiment, after the shock absorber bench durability test is completed, the silicone oil degradation rate and damage rate of the shock absorber are measured by an instrument to obtain the test damage value of the shock absorber.

[0069] S230. Based on the torsional vibration subharmonic curve and the test damage value, determine the rated point life of the external characteristic of the shock absorber under the bench durability test environment.

[0070] Among them, the external characteristic rated point life is the life of the shock absorber when the engine is at the highest speed and highest load rate.

[0071] Specifically, the torsional vibration subharmonic curve is formed by torsional vibration test, and the test damage value is the damage value of the shock absorber after the bench durability test, so that according to the test damage value and the torsional vibration subharmonic curve, the external characteristic rated point life of the shock absorber under the bench durability test environment can be inferred. For example, if the test damage value is 10%, that is, the damage to the shock absorber in the process of obtaining the torsional vibration subharmonic curve through the torsional vibration test is 10% of the total life of the shock absorber, it can be known that the external characteristic rated point life of the shock absorber under the bench durability test environment is the life of the shock absorber consumed by 10 torsional vibration tests.

[0072] Specifically, after the engine is operated to a stable state under rated conditions on a vehicle test bench, a torsional vibration test is performed on the shock absorber, that is, within a preset time period, the engine is steadily operated from the highest speed point to the lowest speed point, and the torsional vibration characteristics of the shock absorber are obtained at the same time to form a torsional vibration subharmonic curve; then, a bench durability test is performed on the shock absorber, and the test damage value of the shock absorber is detected, and based on the torsional vibration subharmonic curve and the test damage value, the external characteristic rated point life of the shock absorber under the bench durability test environment is determined, thereby improving the accuracy of the external characteristic rated point life of the shock absorber under the determined bench durability test environment.

[0073] S240: Obtain a road measured load spectrum of the shock absorber.

[0074] S250. Determine the actual damage value of the shock absorber according to the measured road load spectrum and the rated point life of the external characteristics.

[0075] The actual damage value is the damage value of the shock absorber during the road spectrum collection period.

[0076] S260: predict the life of the shock absorber under road conditions based on the first formula according to the actual damage value and the mileage during the road spectrum collection period.

[0077] Among them, the first formula is as follows:

[0078]

[0079] Where L is the life of the shock absorber under road conditions, l is the mileage during the road spectrum collection period, and D i,j * is the damage value of any operating point during the road spectrum acquisition, ∑D i,j * is the total damage value during the road spectrum acquisition period.

[0080] In this embodiment, after the engine runs to a stable state under rated working conditions, the shock absorber is subjected to a torsional vibration test, that is, within a preset time period, the engine is run steadily from the highest speed point to the lowest speed point, and the torsional vibration characteristics of the shock absorber are obtained at the same time to form a torsional vibration subharmonic curve, and then the test damage value of the shock absorber is detected, and based on the torsional vibration subharmonic curve and the test damage value, the rated point life of the external characteristics of the shock absorber under the bench durability test environment is determined, thereby improving the accuracy of the rated point life of the external characteristics of the shock absorber under the bench durability test environment, and further improving the accuracy of the life of the shock absorber under road conditions. At the same time, according to the actual damage value and the mileage during the road spectrum acquisition, based on the first formula, the life of the shock absorber under road conditions is predicted, which is conducive to further improving the accuracy of the life of the shock absorber under road conditions.

[0081] Embodiment 3

[0082] Figure 3 This is a flowchart of a life prediction method for an engine silicone oil shock absorber provided in the third embodiment of the present invention. Based on the above embodiments, this embodiment further provides steps for determining the external characteristic rated point life of the shock absorber under the bench durability test environment based on the torsional vibration subharmonic curve and the test damage value, and determining the actual damage value of the shock absorber based on the road measured load spectrum and the external characteristic rated point life of the shock absorber. Figure 3 As shown, the method specifically:

[0083] S310: Perform a torsional vibration test on the shock absorber to obtain a torsional vibration subharmonic curve of the shock absorber.

[0084] S320. Perform a bench durability test on the shock absorber and obtain a test damage value of the shock absorber.

[0085] Among them, the test damage value is the damage value of the shock absorber after the bench durability test.

[0086] S330. Determine the relationship between the total damage value of the shock absorber and the rated point life of the external characteristic based on the torsional vibration subharmonic curve.

[0087] Among them, the torsional vibration subharmonic curve can reflect the relationship between the engine speed, load rate and the torsional vibration amplitude of the shock absorber.

[0088] It should be noted that the engine test damage value is the total damage value of the engine after the bench durability test, so that the external characteristic rated point life of the shock absorber under the bench durability test environment can be inferred based on the test damage value and the torsional vibration subharmonic curve.

[0089] Optionally, S330 includes: determining the relationship between the life of the shock absorber at any operating point and the life at the rated point of the external characteristic based on the torsional vibration subharmonic curve; determining the relationship between the total damage value of the shock absorber and the life at the rated point of the external characteristic based on the relationship between the life of the shock absorber at any operating point and the life at the rated point of the external characteristic.

[0090] Among them, there is the following relationship between the life of the shock absorber at any operating point and the life at the rated point of the external characteristics:

[0091] Among them, N i,j is the life of the shock absorber at any operating point; N r is the rated point life of the external characteristic; i is the engine speed; j is the load rate; A r A is the torsional amplitude value at the rated point of the external characteristic; i,100％ is the torsional amplitude value at other speed points on the external characteristic.

[0092] Combining the torsional vibration subharmonic curve and the above formula, the life coefficient matrix of the shock absorber under the bench durability test environment is obtained.

[0093] There is the following relationship between the damage value of the shock absorber at any operating point and the rated life of the external characteristic:

[0094] Among them, D i,j is the damage value at any operating point; n i,j is the actual number of cycles corresponding to the operating point; R max , R min is the maximum and minimum speed; η max , ηmin are the maximum and minimum load rates; is the total damage value of the shock absorber.

[0095] Combined with the number of cycles and torsional vibration subharmonic curves of each operating point in the bench durability test environment, the damage coefficient matrix of the shock absorber in the bench durability test environment is obtained. Among them, the damage coefficient matrix of the shock absorber in the bench durability test environment can reflect the relationship between the life of the external characteristic rated point and the damage value of the corresponding operating point in the bench durability test environment.

[0096] In this way, a relationship model between the total damage value of the shock absorber and the life at the rated point of the external characteristic is established. Based on the relationship model between the total damage value and the life at the rated point of the external characteristic, a logical association between the life of the shock absorber and the damage value of the shock absorber and the torsional amplitude value of the external characteristic under any operating point can be achieved.

[0097] S340. Determine the rated point life of the external characteristic according to the test damage value.

[0098] Specifically, based on the relationship between the total damage value of the shock absorber and the rated point life of the external characteristics, the test damage value is substituted to obtain the rated point life of the external characteristics under the bench durability test environment.

[0099] S350: Obtain a road measured load spectrum of the shock absorber.

[0100] S360. Based on the measured road load spectrum and in combination with the relationship between the life of the shock absorber at any operating point and the life at the rated point of the external characteristic, determine the damage coefficient matrix of the shock absorber during the road spectrum collection period.

[0101] Among them, the damage coefficient matrix of the shock absorber during the road spectrum collection period can reflect the relationship between the rated point life of the external characteristics and the damage value of the corresponding operating point during the road spectrum collection period.

[0102] Specifically, based on the measured road load spectrum, combined with the relationship between the life of the shock absorber at any operating point and the life of the external characteristic rated point, based on the following formula:

[0103] Determine the damage coefficient matrix of the shock absorber during road spectrum acquisition.

[0104] S370. Determine the actual damage value of the shock absorber according to the damage coefficient matrix and the rated point life of the external characteristic of the shock absorber.

[0105] Among them, the actual damage value of the shock absorber is expressed as follows:

[0106]

[0107] in, is the number of cycles under a certain actual road condition.

[0108] Specifically, after obtaining the measured road load spectrum of the shock absorber, based on the measured road load spectrum and the relationship between the life of the shock absorber at any operating point and the rated point life of the external characteristic, the damage coefficient matrix of the shock absorber during the road spectrum collection period is obtained. Among them, the damage coefficient matrix of the shock absorber during the road spectrum collection period can reflect the relationship between the rated point life of the external characteristic and the damage value of the corresponding operating point during the road spectrum collection period, so as to determine the actual damage value of the shock absorber according to the damage coefficient matrix of the shock absorber during the road spectrum collection period and the rated point life of the external characteristic of the shock absorber.

[0109] S380: predict the life of the shock absorber under road conditions based on the first formula according to the actual damage value and the mileage during the road spectrum collection period.

[0110] Among them, the first formula is as follows:

[0111]

[0112] Where L is the life of the shock absorber under road conditions, l is the mileage during the road spectrum collection period, and D i,j * is the damage value at any operating point during the road spectrum acquisition.

[0113] In this embodiment, by obtaining the torsional vibration subharmonic curve of the shock absorber and the test damage value of the shock absorber, and based on the torsional vibration subharmonic curve, the relationship between the total damage value of the shock absorber and the rated point life of the external characteristic is determined, so as to achieve a logical association between the life of the shock absorber and the damage value of the shock absorber and the torsional vibration amplitude value of the external characteristic under any working point, and the rated point life of the external characteristic can be determined according to the test damage value, and then by obtaining the road measured load spectrum of the shock absorber, and based on the road measured load spectrum, combined with the number of cycles of each working point during the road spectrum collection and the life of the shock absorber at each working point under the test environment, the damage coefficient matrix of the shock absorber during the road spectrum collection period is determined, so as to determine the actual damage value of the shock absorber according to the damage coefficient matrix of the shock absorber during the road spectrum collection period and the rated point life of the external characteristic of the shock absorber, and then predict the life of the shock absorber under road conditions according to the actual damage value and the mileage during the road spectrum collection period based on the first formula, so that the damage value of the shock absorber during the road spectrum collection period is more accurate, thereby further improving the accuracy of the life prediction of the shock absorber under road conditions.

[0114] Embodiment 4

[0115] This embodiment provides a life prediction device for an engine silicone oil damper, which can be implemented in the form of hardware and / or software. Figure 4 The schematic diagram of the life prediction device of the engine silicone oil damper provided in the fourth embodiment of the present invention is as follows: Figure 4 As shown, the device comprises:

[0116] The external characteristic rated point life acquisition module 410 is used to acquire the external characteristic rated point life of the shock absorber under the bench durability test environment.

[0117] The road measured load spectrum acquisition module 420 is used to acquire the road measured load spectrum of the shock absorber.

[0118] The actual damage value determination module 430 is used to determine the actual damage value of the shock absorber according to the measured road load spectrum and the rated point life of the external characteristics; the actual damage value is the damage value of the shock absorber during the road spectrum collection period.

[0119] The life prediction module 440 is used to predict the life of the shock absorber under road conditions according to the actual damage value and the mileage during the road spectrum collection period.

[0120] The life prediction device for the engine silicone oil vibration damper provided in an embodiment of the present invention can execute the life prediction method for the engine silicone oil vibration damper provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method. The similarities can be referred to the above description.

[0121] Embodiment 5

[0122] An embodiment of the present invention provides a vehicle, which includes at least one processor; and a memory that is communicatively connected to the at least one processor; wherein the memory stores a computer program that can be executed by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the life prediction method for the engine silicone oil damper provided in any of the above embodiments. Since the vehicle provided in the embodiment of the present invention includes the above processor and memory, and the memory stores a computer program that can be executed by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the life prediction method for the engine silicone oil damper provided in any of the above embodiments, it can have the corresponding structure and characteristics for executing the life prediction method for the engine silicone oil damper provided in the embodiment of the present invention, and can achieve the beneficial effects of the life prediction method for the engine silicone oil damper provided in the embodiment of the present invention. The similarities can be referred to the above description.

[0123] Embodiment 6

[0124] Based on the same concept, an embodiment of the present invention further provides a computer-readable storage medium, which stores computer instructions, and the computer instructions are used to enable a processor to implement the control method provided by any of the above embodiments when executed.

[0125] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0126] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A life prediction method for an engine silicone oil shock absorber, characterized in that: include: Obtaining the rated point life of the external characteristics of the shock absorber under the bench durability test environment; wherein the rated point life of the external characteristics is the life of the shock absorber when the engine is at the highest speed and the highest load rate; Obtaining a road measured load spectrum of the shock absorber; Determine the actual damage value of the shock absorber according to the measured road load spectrum and the rated point life of the external characteristic; the actual damage value is the damage value of the shock absorber during the road spectrum collection period; The life of the shock absorber under road conditions is predicted based on the actual damage value and the mileage during the road spectrum collection period.

2. The life prediction method of the engine silicone oil damper according to claim 1, characterized in that: Obtaining the rated point life of the external characteristics of the shock absorber under the bench durability test environment, including: Performing a torsional vibration test on the vibration absorber to obtain a torsional vibration subharmonic curve of the vibration absorber; wherein the torsional vibration subharmonic curve is used to describe the corresponding relationship between the torsional vibration amplitude of the vibration absorber and the rotation speed of the engine at multiple preset harmonics; Performing a bench durability test on the shock absorber and obtaining a test damage value of the shock absorber; wherein the test damage value is a damage value of the shock absorber after the bench durability test; Based on the torsional vibration subharmonic curve and the test damage value, the external characteristic rated point life of the shock absorber under the bench durability test environment is determined.

3. The life prediction method of the engine silicone oil damper according to claim 2, characterized in that: Performing a torsional vibration test on the vibration absorber to obtain a torsional vibration subharmonic curve of the vibration absorber includes: After the engine runs to a stable state under rated conditions, the engine is smoothly operated from a maximum speed point to a minimum speed point within a preset time period, and the torsional vibration characteristics of the shock absorber are obtained to form a torsional vibration subharmonic curve.

4. The life prediction method of the engine silicone oil damper according to claim 2, characterized in that: Determining the rated point life of the external characteristic of the shock absorber under the bench durability test environment based on the torsional vibration subharmonic curve and the test damage value includes: Based on the torsional vibration subharmonic curve, determining the relationship between the total damage value of the vibration absorber and the rated point life of the external characteristic; The external characteristic rated point life is determined according to the relationship between the test damage value and the total damage value of the shock absorber and the external characteristic rated point life.

5. The life prediction method of the engine silicone oil damper according to claim 4, characterized in that: Determining the relationship between the total damage value of the vibration absorber and the rated point life of the external characteristic based on the torsional vibration subharmonic curve includes: Based on the torsional vibration subharmonic curve, determining the relationship between the life of the shock absorber at any operating point and the life at the rated point of the external characteristic; According to the relationship between the life of the shock absorber at any operating point and the life at the rated point of the external characteristic, the relationship between the total damage value of the shock absorber and the life at the rated point of the external characteristic is determined.

6. The life prediction method of the engine silicone oil damper according to claim 5, characterized in that: Determining the actual damage value of the shock absorber according to the road measured load spectrum and the rated point life of the external characteristic of the shock absorber includes: Based on the measured road load spectrum and in combination with the relationship between the life of the shock absorber at any operating point and the life at the rated point of the external characteristic, determining the damage coefficient matrix of the shock absorber during the road spectrum collection period; The actual damage value of the shock absorber is determined according to the damage coefficient matrix and the external characteristic rated point life of the shock absorber.

7. The life prediction method of the engine silicone oil damper according to claim 1, characterized in that: Predicting the life of the shock absorber under road conditions according to the actual damage value and the mileage during the road spectrum collection period includes: According to the actual damage value and the mileage during the road spectrum collection period, based on the first formula, the life of the shock absorber under road conditions is predicted; wherein the first formula is as follows: Wherein, L is the life of the shock absorber under road conditions, l is the mileage during the road spectrum collection period, and D i,j * is the damage value at any operating point during the road spectrum acquisition.

8. A life prediction device for an engine silicone oil damper, characterized in that: include: An external characteristic rated point life acquisition module, used to acquire the external characteristic rated point life of the shock absorber under a bench durability test environment; A road measured load spectrum acquisition module, used to acquire the road measured load spectrum of the shock absorber; An actual damage value determination module, used to determine the actual damage value of the shock absorber according to the road measured load spectrum and the rated point life of the external characteristic; The actual damage value is the damage value of the shock absorber during the road spectrum collection period; The life prediction module is used to predict the life of the shock absorber under road conditions according to the actual damage value and the mileage during the road spectrum collection period.

9. A vehicle, characterized in that: include: at least one processor; And, a memory communicatively connected to the at least one processor; wherein the memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the life prediction method for the engine silicone oil vibration damper according to any one of claims 1-7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the life prediction method of an engine silicone oil vibration damper according to any one of claims 1 to 7 when executed.

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