Method, system and device for calculating abrasion loss of cylinder sleeve

Abstract

The invention discloses a method, system and device for calculating the abrasion loss of a cylinder sleeve. The method, system and device are used for calculating the abrasion loss of the cylinder sleeve when a vehicle runs. The method comprises the following steps: acquiring operation data of a target vehicle; the rotating speed and the torque of the target vehicle are obtained from the operation data, and the operation working condition of the target vehicle is determined; determining detonation pressure data of the target vehicle from a universal curve according to the operation condition; and inputting the detonation pressure data and the operation condition of the target vehicle into a damage model to obtain the abrasion loss of the cylinder sleeve.

Description

Technical Field

[0001] The present application relates to the field of mechanical industry, and in particular to a method, system and device for calculating the wear amount of a cylinder liner. Background Art

[0002] The cylinder liner is a cylindrical part embedded in the cylinder block of an internal combustion engine. It, together with the piston, piston ring, cylinder block, cylinder head and other parts, forms the crank-connecting rod mechanism, one of the two major mechanisms of the engine. The main function of this mechanism is to convert the heat energy generated by the combustion of fuel into the mechanical energy of the reciprocating motion of the piston, and then convert the reciprocating motion of the piston into the rotational motion of the crankshaft through the connecting rod to output power to the outside. The cylinder liner has three main functions. First, it constitutes the combustion chamber of the internal combustion engine to ensure the sealing of high-temperature and high-pressure fuel gas; second, it is the reciprocating surface of the piston and piston ring and has a guiding function; third, it transfers energy to the surrounding cooling medium through the cylinder wall.

[0003] The cylinder liner is one of the key parts in the engine with the worst working conditions. It not only withstands high-temperature and high-pressure fuel gas, but also has friction and wear problems with the piston and piston ring. During the use of the vehicle, long-term overload operation, frequent starting, throttle, sudden acceleration, etc. will cause varying degrees of wear on the cylinder liner, which is closely related to the vehicle's driving conditions. However, when the wear reaches a certain level, it will lead to increased engine oil consumption, decreased efficiency and other problems. In severe cases, it may cause cylinder pulling, resulting in difficulty in starting the engine or automatic shutdown. Summary of the invention

[0004] In order to solve the above technical problems, the present application provides a method, system and device for calculating the wear amount of a cylinder liner, which are used to calculate the wear amount of a cylinder liner when a vehicle is running.

[0005] The technical solution provided in this application is described below:

[0006] The first aspect of the present application provides a method for calculating the wear amount of a cylinder liner, comprising:

[0007] Obtaining the operating data of the target vehicle;

[0008] Acquire the speed and torque of the target vehicle from the operating data to determine the operating condition of the target vehicle;

[0009] Determining explosion pressure data of the target vehicle from a universal curve according to the operating condition;

[0010] The explosion pressure data and operating conditions of the target vehicle are input into the damage model to obtain the cylinder liner wear amount.

[0011] Optionally, the damage model is calculated by:

[0012] The explosion pressure data of the operating conditions corresponding to different speeds and torques are determined according to the universal curve, and all operating conditions are fitted with the explosion pressure data corresponding to all the operating conditions to obtain a damage model, which is expressed as the following relationship:

[0013]

[0014] Where D rel is the cumulative relative wear of the cylinder liner, N(t) is the number of compression releases of a single cylinder at the corresponding explosion pressure and speed, PFP(t) is the explosion pressure of the engine, n(t) is the engine speed, k is the wear coefficient of the explosion pressure on the cylinder liner, and b is the wear coefficient of the speed on the cylinder liner.

[0015] Optionally, determining the explosion pressure data of the target vehicle from the universal curve according to the operating condition includes:

[0016] Conduct bench tests on the engine to obtain universal curves;

[0017] Classify the operating conditions according to the universal curve, and obtain the corresponding explosion pressure data according to the classification results;

[0018] The explosion pressure data of the target vehicle is determined according to the operating condition of the target vehicle.

[0019] Optionally, after classifying the operating conditions according to the universal curve and acquiring corresponding explosion pressure data according to the classification results, the method further includes:

[0020] Obtaining the operating condition corresponding to the target vehicle from the universal curve to perform an abnormal test and obtain a test result;

[0021] The test results are input into a damage model to obtain the wear limit value of the target vehicle.

[0022] Optionally, after inputting the explosion pressure data and operating conditions of the target vehicle into the damage model to obtain the cylinder liner wear amount, the method further includes:

[0023] Determining whether the cylinder liner wear amount is less than the wear limit value;

[0024] If so, the remaining wear amount of the cylinder liner of the target vehicle is displayed, where the remaining wear amount of the cylinder liner is the difference between the cumulative relative wear limit value of the cylinder liner and the wear amount of the cylinder liner.

[0025] A second aspect of the present application provides a system for calculating the wear amount of a cylinder liner, comprising:

[0026] Optionally, the system comprises:

[0027] A first acquisition unit, used to acquire operation data of a target vehicle;

[0028] A second acquisition unit, configured to acquire the rotation speed and torque of the target vehicle from the operating data to determine the operating condition of the target vehicle;

[0029] A first determining unit, configured to determine explosion pressure data of the target vehicle from a universal curve according to the operating condition;

[0030] The model calculation unit is used to input the explosion pressure data and operating conditions of the target vehicle into the damage model to obtain the cylinder liner wear amount.

[0031] Optionally, the first determining unit is further configured to:

[0032] The model training unit is used to determine the explosion pressure data of the operating conditions corresponding to different speeds and torques according to the universal curve, and to perform fitting calculation on all the operating conditions and the explosion pressure data corresponding to all the operating conditions to obtain a damage model, which is expressed as the following relationship:

[0033]

[0034] Where D rel is the cumulative relative wear of the cylinder liner, N(t) is the number of compression releases of a single cylinder at the corresponding explosion pressure and speed, PFP(t) is the explosion pressure of the engine, n(t) is the engine speed, k is the wear coefficient of the explosion pressure on the cylinder liner, and b is the wear coefficient of the speed on the cylinder liner.

[0035] The first determining unit is further configured to:

[0036] Conduct bench tests on the engine to obtain universal curves;

[0037] Classify the operating conditions according to the universal curve, and obtain the corresponding explosion pressure data according to the classification results;

[0038] The explosion pressure data of the target vehicle is determined according to the operating condition of the target vehicle.

[0039] Optionally, the system further includes:

[0040] A judging unit, used for judging whether the cylinder liner wear amount is less than the cylinder liner cumulative relative wear limit value;

[0041] The display unit is used to display the remaining wear amount of the cylinder liner of the target vehicle when the judgment result of the judgment unit is yes, wherein the remaining wear amount of the cylinder liner is the difference between the cumulative relative wear limit value of the cylinder liner and the wear amount of the cylinder liner.

[0042] A third aspect of the present application provides a device for calculating the wear amount of a cylinder liner, the device comprising:

[0043] Processor, memory, input-output unit, and bus;

[0044] The processor is connected to the memory, the input and output unit, and the bus;

[0045] The memory stores a program, and the processor calls the program to execute the first aspect and any optional method in the first aspect.

[0046] A fourth aspect of the present application provides a computer-readable storage medium, on which a program is stored. When the program is executed on a computer, the program executes the first aspect and any optional method in the first aspect.

[0047] It can be seen from the above technical solutions that this application has the following advantages:

[0048] The present application obtains sufficient data samples for data analysis and testing, obtains the explosion pressure of the engine, and obtains a damage model for calculating the engine cylinder liner wear by bench testing the explosion pressure, so that the engine and the corresponding vehicle can calculate the current cylinder liner wear in real time through the damage model while running. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solution in the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0050] Figure 1 A schematic flow chart of an embodiment of a method for calculating cylinder liner wear in the present application;

[0051] Figure 2 A schematic flow chart of another embodiment of the method for calculating the wear amount of a cylinder liner in the present application;

[0052] Figure 3 A schematic flow chart of an embodiment of a method for obtaining a damage model in a method for calculating cylinder liner wear in the present application;

[0053] Figure 4 A schematic diagram of the structure of an embodiment of a system for calculating the wear amount of a cylinder liner in the present application;

[0054] Figure 5 It is a schematic structural diagram of another embodiment of the system for calculating the cylinder liner wear amount in the present application;

[0055] Figure 6 The figure is a schematic diagram of the structure of an embodiment of the device for calculating the wear amount of the cylinder liner in the present application. DETAILED DESCRIPTION

[0056] It should be noted that the method, system and device for calculating the wear of the cylinder liner provided in this application can be applied to a terminal, a system or a server. For example, the terminal can be a smart phone or a computer, a tablet computer, a smart TV, a smart watch, a portable computer terminal or a fixed terminal such as a desktop computer. For the convenience of explanation, this application uses the terminal as an example for explanation.

[0057] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0058] See also Figure 1 The present application first provides an embodiment of a method for calculating the wear amount of a cylinder liner, the embodiment comprising:

[0059] S101, obtaining operation data of a target vehicle;

[0060] The target vehicle is the vehicle to be tested for cylinder liner wear in this application. When the vehicle is in operation, the cylinder liner wear of the vehicle is correlated with the explosion pressure and rotation speed of the vehicle, that is, the explosion pressure and rotation speed of the vehicle will affect the cylinder liner wear. However, because the explosion pressure and rotation speed affect each other and both cause wear to the cylinder liner at the same time, the actual explosion pressure and rotation speed have a non-linear effect on the cylinder liner wear. Due to cost constraints, the explosion pressure of the engine in the current operating state cannot be directly detected on the actual engine body. Therefore, it is necessary to obtain the operating data of the target vehicle to provide a basis for the subsequent analysis of the cylinder liner wear of the vehicle.

[0061] S102, acquiring the speed and torque of the target vehicle from the operating data, and determining the operating condition of the target vehicle;

[0062] After obtaining the engine operation data, the terminal will obtain the speed and torque of the target vehicle from the operating data to determine the operating condition of the target vehicle. Under different operating conditions, different vehicle speeds will correspond to different torques. Therefore, the operating condition of the target vehicle can be confirmed by the speed and torque. The operating condition can feedback the vehicle corresponding to the engine, that is, the current operating environment of the target vehicle, including but not limited to: road conditions, temperature, air pressure and other external factors that affect the engine power output.

[0063] S103, determining explosion pressure data of the target vehicle from a universal curve according to the operating condition;

[0064] Because there is no explosion pressure sensor in the vehicle, and the explosion pressure is a relatively stable value for the engine and its running vehicle, among which the explosion pressure will be affected when the speed and torque change. In order to reduce the judgment errors caused by the change of explosion pressure, in actual situations, the terminal will obtain the operating data of the target vehicle, and subdivide the operating conditions carried in the operating data, and obtain the corresponding explosion pressure data of the target vehicle's operating conditions obtained by the subdivision in the universal curve.

[0065] Therefore, in actual situations, the vehicle will display the explosion pressure of the engine under the corresponding operating conditions, and the display content is also stored in the terminal that controls the engine (engine controller). The explosion pressure data generated by the current operating condition of the target vehicle is one of the parameters obtained at the same time when the universal curve is obtained through the bench test.

[0066] Specifically, in actual situations, the universal curve is a curve that corresponds in detail to the engine operating state, which is obtained by bench simulation of different operating conditions. In actual situations, explosion pressure measurement cannot be performed when the vehicle is running. Therefore, the explosion pressure data under different operating conditions is obtained by conducting universal curve simulation tests on the bench.

[0067] Based on the feedback from the simulation test, the terminal can obtain the correspondence between the engine's operating conditions and explosion pressure.

[0068] S104, inputting the explosion pressure data and operating conditions of the target vehicle into a damage model to obtain the cylinder liner wear amount.

[0069] In the embodiment of the present application, after the explosion pressure data of the target vehicle is obtained, the explosion pressure data and the corresponding operating conditions are input into the damage model for calculation, and the calculation result is the cylinder liner wear caused by the current explosion pressure of the target vehicle. For the target vehicle, the cylinder liner wear is a cumulative value. When the engine is started for the first time, the cylinder liner wear is recorded as 0. The wear result obtained by calculating the explosion pressure data of the target vehicle through the damage model is an accumulated value of the current cylinder liner wear. The accumulated value is calculated in real time according to the changes in the operating conditions of the target vehicle. According to the operating time and operating conditions of the target vehicle, the value of the cylinder liner wear at the terminal will be accumulated upward. Specifically, the terminal periodically obtains the current vehicle explosion pressure data, calculates the wear caused by the current explosion pressure data on the cylinder liner, and includes the calculation result in the cylinder liner wear. The period for obtaining the explosion pressure data is obtained through external settings and is a changeable value. The specific value is not limited here.

[0070] Specifically, the damage model is an empirical model, that is, the relationship between the explosion pressure and the vehicle operating condition is obtained by fitting a large number of vehicle operating conditions and their corresponding explosion pressure values ​​using the universal curve obtained in step S103.

[0071] After inputting the target vehicle's operating conditions and explosion pressure data into the damage model, the result obtained is the cumulative relative wear of the cylinder liner, that is, the cumulative wear generated by the target vehicle from the running time of 0 to the current time. Specifically, from the first start of the engine, the rotation speed and explosion pressure of the target vehicle during each operation are accumulated and calculated to obtain the cumulative value of the cylinder liner wear. This cumulative value is the cylinder liner wear.

[0072] See also Figure 2 The present application provides another embodiment of a method for calculating the wear amount of a cylinder liner, the embodiment comprising:

[0073] S201, obtaining the operating data of the target vehicle;

[0074] S202, acquiring the speed and torque of the target vehicle from the operating data, and determining the operating condition of the target vehicle;

[0075] Steps S201 to S202 in this embodiment are similar to steps S101 to S102 in the aforementioned embodiment, and will not be described in detail here.

[0076] S203, performing bench testing on the engine to obtain a universal curve;

[0077] Specifically, the bench test process is to determine the vehicle's operating condition data based on feedback data from market vehicles, and to perform a bench test on the engine to simulate operation using the vehicle's operating condition data as a calibration point, thereby obtaining a corresponding operating point for an operating condition.

[0078] Because in actual situations, explosion pressure cannot be obtained through feedback data from market vehicles. Therefore, when the missing operating condition data makes it impossible to directly obtain the speed and torque of the engine corresponding to the vehicle through the feedback data from market vehicles, and thus obtain the explosion pressure value through bench testing, the missing data will be supplemented by interpolation calculation to obtain a precise and complete explosion pressure curve.

[0079] S204, classifying the operating conditions according to the universal curve, and obtaining corresponding explosion pressure data according to the classification results;

[0080] An operating condition described in step S203 is a classification of operating conditions, that is, the relationship between the engine speed and torque of a group of vehicles to be tested is a classification. In actual situations, the correspondence between the speed and the torque can display the vehicle type (such as engineering vehicles, work vehicles and transportation vehicles) and the vehicle load (mainly referring to the actual load of engineering vehicles or work vehicles) of the target vehicle. Therefore, the operating condition determined according to the correspondence between the speed and the torque can refer to the operating state of a type of vehicle under an operating environment, and the data contained in the operating state includes the maintenance duration of the operating state.

[0081] According to the test calculation of step S203, and after interpolation and completion of the missing values, the terminal can obtain the explosion pressure data of the corresponding vehicle under a certain operating condition through the universal curve. In actual situations, the terminal will store the explosion pressure data related to the vehicle type, the corresponding relationship between the operating condition and the cylinder liner wear amount according to the vehicle type.

[0082] S205. Determine explosion pressure data of the target vehicle according to the operating condition of the target vehicle.

[0083] In the process of determining the explosion pressure data of the target vehicle, the terminal has obtained the operating conditions of the target vehicle, that is, the torque and speed of the target vehicle in the previous steps. After obtaining the torque and speed of the target vehicle, the terminal can determine the explosion pressure data of the corresponding target vehicle from the universal curve based on the data.

[0084] S206, obtaining the operating condition corresponding to the target vehicle from the universal curve, performing an abnormality test, and obtaining a test result;

[0085] Specifically, the purpose of the universal curve is to obtain the actual parameters of the vehicle corresponding to the operating conditions, and the abnormal test is used to determine the wear limit value of the target vehicle under the operating conditions, that is, to simulate when the engine has a significant performance impact. At this time, the cumulative relative wear of the cylinder liner obtained by bench test simulation can be used as the wear limit value.

[0086] In the actual test environment, the state of the engine where the performance is significantly affected by cylinder liner wear can be obtained by bench testing the abnormal operating data within the universal curve. Generally, the significant performance impact is reflected as an extreme value in the model, so the test results obtained can represent the extreme value of the damage model.

[0087] S207: Input the test results into a damage model to obtain a wear limit value of the target vehicle.

[0088] In actual situations, the wear limit value is a specific value calculated by using the test results obtained by performing a limit test on the bench. The limit test is the above-mentioned abnormal test. The accumulated wear is expressed as the cylinder liner wear amount, which is actually the period from the initial start-up of the vehicle to the cylinder liner wear state.

[0089] This value is obtained through testing and stored in the terminal. In actual situations, the operating conditions of the target vehicle are changing. The limit value of the cylinder liner is a value from the initial start of the engine. The terminal accumulates the corresponding wear generated during the operation of the target vehicle according to the operating conditions of the target vehicle, thereby obtaining the current cylinder liner wear of the target vehicle. Because the terminal has a wear limit value obtained from abnormal test results, during the operation of the target vehicle, the current cylinder liner wear of the target vehicle can be compared with the wear limit value, so that the terminal obtains the current cylinder liner wear state of the target vehicle and the actual value of the wear limit value, so that in subsequent steps, the terminal can judge the state of the cylinder liner wear of the target vehicle.

[0090] S208, inputting the explosion pressure data and operating conditions of the target vehicle into a damage model to obtain the cylinder liner wear amount.

[0091] Step S208 in this embodiment is similar to step S104 in the aforementioned embodiment, and will not be described in detail here.

[0092] S209, determining whether the cylinder liner wear amount is less than the wear limit value;

[0093] When the terminal simultaneously obtains the current cylinder liner wear amount of the target vehicle and the wear limit value corresponding to the current operating condition of the target vehicle, the terminal will judge the current cylinder liner wear status of the target vehicle based on the above two data. When the judgment result is that the cylinder liner wear amount is less than the wear limit value, step S210 is executed. When the judgment result is that the cylinder liner wear amount is greater than the wear limit value, it is determined whether to display the current cylinder liner wear amount on the instrument panel according to user needs.

[0094] S210: If yes, then display the remaining wear amount of the cylinder liner of the target vehicle, where the remaining wear amount of the cylinder liner is the difference between the cumulative relative wear limit value of the cylinder liner and the wear amount of the cylinder liner.

[0095] When the terminal determines that the cylinder liner wear of the target vehicle is greater than the wear limit, it means that the cylinder liner wear of the target vehicle will affect the vehicle's operating state. At this time, the terminal will display the remaining cylinder liner wear of the target vehicle on the dashboard to prompt the owner to replace the cylinder liner. Specifically, the calculation process of the remaining cylinder liner wear is: h = d-Drel, where h is the remaining cylinder liner wear, d is the wear limit, and Drel is the cylinder liner wear.

[0096] See also Figure 3 The present application provides an embodiment of a method for obtaining a damage model in a method for calculating cylinder liner wear, and the embodiment includes:

[0097] S301. Determine the explosion pressure data of the operating conditions corresponding to different rotation speeds and torques according to the universal curve, and perform fitting calculation on all the operating conditions and the explosion pressure data corresponding to all the operating conditions to obtain a damage model:

[0098] Specifically, the data source of the fitting process is: confirm the operating condition f of the vehicle on the market and the operating time t of the condition through big data. The operating condition f is represented by the speed n and the torque T, such as f: (n, T), that is, the speed n and the torque T correspond to the operating condition f. By repeatedly performing cylinder liner wear tests based on the f data corresponding to the universal curve, the damage model of the cumulative relative wear of the cylinder liner, the engine speed, and the explosion pressure can be fitted:

[0099]

[0100] Where D rel is the cumulative relative wear of the cylinder liner, N(t) is the number of compression releases of a single cylinder at the corresponding explosion pressure and speed, PFP(t) is the explosion pressure of the engine, n(t) is the engine speed, k is the wear coefficient of the explosion pressure on the cylinder liner, and b is the wear coefficient of the speed on the cylinder liner.

[0101] The damage model can calculate and accumulate the relative wear of the cylinder liner under different working conditions through the speed n and explosion pressure PFP to obtain the cumulative relative wear of the cylinder liner Drel. The previous operating conditions f of the market vehicle obtained are further imported into the damage model, and the wear coefficients b and k under different working conditions are automatically obtained from the wear coefficient table to calculate the current cumulative relative wear of the cylinder liner Drel; at the same time, the cylinder liner wear test with different speeds n and explosion pressure PFP is carried out on the test bench, and the cumulative relative wear of the cylinder liner Drel is calculated through the model. When the engine has a significant performance impact, the cumulative relative wear of the cylinder liner Drel at this time can be used as the wear limit d.

[0102] The cumulative relative wear limit d of the cylinder liner obtained from the bench test is used as the threshold for judging the maintenance reminder on the whole vehicle. The current cumulative relative wear Drel of the vehicle's cylinder liner obtained by calculation is then compared with the limit d. When Drel≥d, a request is triggered to remind the user to choose an appropriate time for maintenance. When Drel≤d, the remaining wear of the cylinder liner is predicted to be h=d-Drel.

[0103] See also Figure 4 The present application provides an embodiment of a system for calculating the wear amount of a cylinder liner, the embodiment comprising:

[0104] A first acquisition unit 401 is used to acquire the operation data of the target vehicle;

[0105] A second acquisition unit 402 is used to acquire the speed and torque of the target vehicle from the operating data to determine the operating condition of the target vehicle;

[0106] A first determining unit 403, configured to determine the explosion pressure data of the target vehicle from the universal curve according to the operating condition;

[0107] The model calculation unit 404 is used to input the explosion pressure data and operating conditions of the target vehicle into the damage model to obtain the cylinder liner wear amount.

[0108] In this embodiment, the functions of each unit are the same as those described above. Figure 1 The steps in the illustrated embodiments correspond to each other and will not be described again here.

[0109] See also Figure 5 The present application provides another embodiment of a system for calculating cylinder liner wear, the embodiment comprising:

[0110] A first acquisition unit 501 is used to acquire the operation data of the target vehicle;

[0111] A second acquisition unit 502 is used to acquire the speed and torque of the target vehicle from the operating data to determine the operating condition of the target vehicle;

[0112] A first determining unit 503, configured to determine the explosion pressure data of the target vehicle from the universal curve according to the operating condition;

[0113] The model calculation unit 504 is used to input the explosion pressure data and operating conditions of the target vehicle into the damage model to obtain the cylinder liner wear amount.

[0114] A judging unit 505 is used to judge whether the cylinder liner wear amount is less than the cylinder liner cumulative relative wear limit value;

[0115] The display unit 506 is used to display the remaining wear amount of the cylinder liner of the target vehicle when the judgment result of the judgment unit is yes, wherein the remaining wear amount of the cylinder liner is the difference between the cylinder liner cumulative relative wear limit value and the cylinder liner wear amount.

[0116] In the embodiment of the present application, the first determining unit 503 is further configured to:

[0117] Conduct bench tests on the engine to obtain universal curves;

[0118] Classify the operating conditions according to the universal curve, and obtain the corresponding explosion pressure data according to the classification results;

[0119] The explosion pressure data of the target vehicle is determined according to the operating condition of the target vehicle.

[0120] The first determining unit 503 is further configured to:

[0121] It is used to determine the explosion pressure data of the operating conditions corresponding to different speeds and torques according to the universal curve, and to perform fitting calculation on all the operating conditions and the explosion pressure data corresponding to all the operating conditions to obtain the damage model, which is expressed as the following relationship:

[0122]

[0123] Where D rel is the cumulative relative wear of the cylinder liner, N(t) is the number of compression releases of a single cylinder at the corresponding explosion pressure and speed, PFP(t) is the explosion pressure of the engine, n(t) is the engine speed, k is the wear coefficient of the explosion pressure on the cylinder liner, and b is the wear coefficient of the speed on the cylinder liner.

[0124] In this embodiment, the functions of each unit are the same as those described above. Figures 2 to 3 The steps in the illustrated embodiments correspond to each other and will not be described again here.

[0125] See also Figure 6 The present application provides an embodiment of a device for calculating the wear amount of a cylinder liner, comprising:

[0126] Processor 601, memory 602, input and output unit 603, bus 604;

[0127] The processor 601 is connected to the memory 602, the input and output unit 603 and the bus 604;

[0128] Processor 601 specifically executes Figures 1 to 3 The operations corresponding to the steps in the method are not described in detail here.

[0129] The present application also relates to a computer-readable storage medium on which a program is stored, wherein when the program is run on a computer, the computer is caused to execute any of the above methods.

[0130] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0131] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0132] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0133] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0134] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, read-only memory), random access memory (RAM, random access memory), disk or optical disk and other media that can store program code.

Claims

1. A method for calculating cylinder liner wear, characterized in that: The method comprises: Obtaining the operating data of the target vehicle; Acquire the speed and torque of the target vehicle from the operating data to determine the operating condition of the target vehicle; Determining explosion pressure data of the target vehicle from a universal curve according to the operating condition; The explosion pressure data and operating conditions of the target vehicle are input into the damage model to obtain the cylinder liner wear amount.

2. The method according to claim 1, characterized in that The calculation method of the damage model includes: The explosion pressure data of the operating conditions corresponding to different speeds and torques are determined according to the universal curve, and all operating conditions are fitted with the explosion pressure data corresponding to all the operating conditions to obtain a damage model, which is expressed as the following relationship: Where D rel is the cumulative relative wear of the cylinder liner, N(t) is the number of compression releases of a single cylinder at the corresponding explosion pressure and speed, PFP(t) is the explosion pressure of the engine, n(t) is the engine speed, k is the wear coefficient of the explosion pressure on the cylinder liner, and b is the wear coefficient of the speed on the cylinder liner.

3. The method according to claim 1, characterized in that Determining the explosion pressure data of the target vehicle from the universal curve according to the operating condition includes: Conduct bench tests on the engine to obtain universal curves; Classify the operating conditions according to the universal curve, and obtain the corresponding explosion pressure data according to the classification results; The explosion pressure data of the target vehicle is determined according to the operating condition of the target vehicle.

4. The method according to claim 3, characterized in that After classifying the operating conditions according to the universal curve and obtaining corresponding explosion pressure data according to the classification results, the method further includes: Obtaining the operating condition corresponding to the target vehicle from the universal curve to perform an abnormal test and obtain a test result; The test results are input into a damage model to obtain the wear limit value of the target vehicle.

5. The method according to claim 4, characterized in that After inputting the explosion pressure data and the operating conditions of the target vehicle into the damage model to obtain the cylinder liner wear amount, the method further includes: Determining whether the cylinder liner wear amount is less than the wear limit value; If so, the remaining wear amount of the cylinder liner of the target vehicle is displayed, where the remaining wear amount of the cylinder liner is the difference between the cumulative relative wear limit value of the cylinder liner and the wear amount of the cylinder liner.

6. A system for calculating the wear of a cylinder liner, characterized in that: The system comprises: A first acquisition unit, used to acquire operation data of a target vehicle; A second acquisition unit, configured to acquire the rotation speed and torque of the target vehicle from the operating data to determine the operating condition of the target vehicle; A first determining unit, configured to determine explosion pressure data of the target vehicle from a universal curve according to the operating condition; The model calculation unit is used to input the explosion pressure data and operating conditions of the target vehicle into the damage model to obtain the cylinder liner wear amount.

7. The method according to claim 6, characterized in that The system further comprises: The model training unit is used to determine the explosion pressure data of the operating conditions corresponding to different speeds and torques according to the universal curve, and to perform fitting calculation on all the operating conditions and the explosion pressure data corresponding to all the operating conditions to obtain a damage model, which is expressed as the following relationship: Where D rel is the cumulative relative wear of the cylinder liner, N(t) is the number of compression releases of a single cylinder at the corresponding explosion pressure and speed, PFP(t) is the explosion pressure of the engine, n(t) is the engine speed, k is the wear coefficient of the explosion pressure on the cylinder liner, and b is the wear coefficient of the speed on the cylinder liner.

8. The system according to claim 6, characterized in that The first determining unit is further configured to: Conduct bench tests on the engine to obtain universal curves; Classify the operating conditions according to the universal curve, and obtain the corresponding explosion pressure data according to the classification results; The explosion pressure data of the target vehicle is determined according to the operating condition of the target vehicle.

9. A device for calculating the wear of a cylinder liner, characterized in that: The device comprises: Processor, memory, input-output unit, and bus; The processor is connected to the memory, the input and output unit, and the bus; The memory stores a program, and the processor calls the program to execute the method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a program, and when the program is executed on a computer, the method according to any one of claims 1 to 7 is performed.

Images