Calculation method for wear amount between engine valve and valve seat and related device

Abstract

The present application discloses a method for calculating the amount of wear between an engine valve and a valve seat and a related device, and relates to the technical field of valve wear quantification. The method includes: establishing an impact wear model according to the influence of the impact angle when the exhaust valve is seated; and establishing a sliding wear model based on Archard wear theory; then respectively calling the impact wear model and the sliding wear model to calculate the normal impact wear, impact sliding wear and sliding wear; and calculating the total wear between the exhaust valve and the valve seat accordingly. The above scheme of the present application fully considers the various types of wear between the exhaust valve and the valve seat, such as specifically differentiating the impact wear into normal impact wear and tangential impact sliding wear, and also calculating the sliding wear after the valve is closed. Compared with the traditional scheme that only considers normal impact wear, the calculation result of the wear amount in the present application is more accurate, and the scheme of the present application is more in line with the actual situation.

Description

Technical Field

[0001] The present application relates to the technical field of valve wear quantification, and particularly to a calculation method for the wear amount between an engine valve and a valve seat and related devices. Background Art

[0002] During the operation of the engine, the exhaust valve repeatedly seats and impacts the valve seat. During the closing period, due to the action of the in-cylinder gas pressure, it contacts the valve seat and bears large mechanical and thermal loads. At the same time, the contact lubrication condition between the valve and the valve seat is poor. In recent years, with the continuous improvement of the intensification degree of diesel engines and the upgrading of emission requirements, the working environment of the valve and the valve seat has become more severe, and wear is likely to occur between the valve and the valve seat, resulting in valve sinking and a decrease in the valve sealing performance, seriously affecting the working performance of the diesel engine. Therefore, for the R & D of diesel engines, establishing an accurate wear model for the exhaust valve and the valve seat is crucial for accurately calculating the valve wear amount.

[0003] According to the dynamic analysis of the exhaust valve, when the valve closes, it is affected by the valve spring force and impacts the valve seat at a certain speed, and the seating speed is usually between 0.2 m / s and 0.5 m / s. When the material surface is subjected to a high-speed instantaneous impact load, spalling, cutting, or plastic deformation occurs, resulting in material loss and a change in the surface topography. In addition to impact wear, when the valve closes, due to the action of the in-cylinder gas pressure, a large contact force will be generated between the valve and the valve seat, causing deformation at the contact between the valve and the valve seat and resulting in sliding wear. That is to say, from a microscopic perspective, the fatigue wear of the valve is the comprehensive effect of two mechanisms, impact wear and sliding wear, under cyclic alternating loads, and is the macroscopic manifestation of plastic deformation and microcracks occurring on the valve surface. Therefore, accurately quantifying the wear amount when the valve seats and the wear amount when the valve closes is the prerequisite for accurately calculating the total wear amount of the exhaust valve. Summary of the Invention

[0004] The purpose of the present application is to provide a calculation method for the wear amount between an engine valve and a valve seat and related devices, which can accurately calculate the wear amount between the engine valve and the valve seat.

[0005] To achieve the above purpose, the present application provides the following solutions:

[0006] In the first aspect, the present application provides a calculation method for the wear amount between an engine valve and a valve seat, including the following steps:

[0007] Establish an impact wear model based on the influence of the impact angle when the exhaust valve seats; the impact wear model includes the normal impact wear amount caused by the impact normal force and the slip wear amount caused by the impact tangential force.

[0008] Based on Archard wear theory, a sliding wear model is established; in the sliding wear model, the sliding wear amount is proportional to the sliding distance and the normal load, respectively; the sliding wear amount is inversely proportional to the hardness of the softer material.

[0009] According to the impact force, impact times and hardness of the softer material when the exhaust valve is seated, the impact wear model is called to calculate the normal impact wear and impact sliding wear.

[0010] According to the normal load, sliding distance and hardness of the softer material when the exhaust valve is closed, the sliding wear model is called to calculate the sliding wear amount.

[0011] The total wear between the exhaust valve and the valve seat is calculated based on the normal impact wear, impact sliding wear and sliding wear.

[0012] Optionally, according to the impact force, impact times and hardness of the softer material when the exhaust valve is seated, the impact wear model is called to calculate the normal impact wear amount and the impact sliding wear amount, which specifically includes the following steps:

[0013] According to the impact angle when the exhaust valve is seated, the impact force when the exhaust valve is seated is divided into normal impact force and tangential impact force.

[0014] Based on the normal impact force and the number of impacts, the impact wear model is called to calculate the normal impact wear amount.

[0015] Based on the tangential impact force, number of impacts and hardness of the softer material, the impact wear model is called to calculate the impact sliding wear amount.

[0016] Alternatively, the normal impact wear amount is calculated according to the following formula:

[0017] W 1 =KNF n nZLS .

[0018] Among them, W 1 is the normal impact wear, K is the normal impact wear coefficient, N is the number of impacts, F n is the normal impact force, n ZLS is the normal impact wear index.

[0019] Alternatively, the impact sliding wear amount is calculated according to the following formula:

[0020]

[0021] Among them, W 2 is the impact sliding wear amount, k is the impact sliding wear coefficient, N is the number of impacts, x is the impact sliding distance, F t is the tangential impact force, H is the hardness of the softer material, mZLS is the tangential impact slip index.

[0022] Optionally, the sliding wear amount is calculated according to the following formula:

[0023]

[0024] where W 3 is the sliding wear amount, p is the probability of generating abrasive grains in the asperities, F is the normal load, l is the sliding distance, and H is the hardness of the softer material.

[0025] Optionally, it further includes:

[0026] Determine the hardness of the softer material at the current temperature according to the influence of temperature on the hardness of the metal material and the current temperature.

[0027] Optionally, the hardness of the softer material at the current temperature is determined according to the following formula:

[0028] H(T) = H 0 ·e -β·T .

[0029] where H(T) is the hardness of the softer material at the current temperature, T is the current temperature, H 0 is the hardness of the softer material at room temperature, e is the impact energy, and β is a constant related to the characteristics of the softer material.

[0030] In a second aspect, the present application provides a computer device, including: a memory, a processor, and a computer program stored on the memory and executable on the processor, and the processor executes the computer program to implement the steps of the method for calculating the wear amount between the engine valve and the valve seat described above.

[0031] In a third aspect, the present application provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, it implements the steps of the method for calculating the wear amount between the engine valve and the valve seat described above.

[0032] In a fourth aspect, the present application provides a computer program product, including a computer program, and when the computer program is executed by a processor, it implements the steps of the method for calculating the wear amount between the engine valve and the valve seat described above.

[0033] According to the specific embodiments provided by the present application, the following technical effects are disclosed in the present application:

[0034] The present application provides a method and a related device for calculating the amount of wear between an engine valve and a valve seat. In the method, an impact wear model is established according to the influence of the impact angle when the exhaust valve is seated; and a sliding wear model is established based on Archard wear theory; then the impact wear model and the sliding wear model are respectively called to calculate the normal impact wear, impact sliding wear and sliding wear; according to the normal impact wear, impact sliding wear and sliding wear, the total wear between the exhaust valve and the valve seat is calculated. The above scheme of the present application fully considers various wear between the exhaust valve and the valve seat, such as specifically differentiating the impact wear into normal impact wear and tangential impact sliding wear. Compared with the traditional scheme that only considers normal impact wear, the calculation result of the impact wear amount of the present application is more accurate and more in line with the actual situation; at the same time, it also considers that when the valve is closed, it is affected by the gas pressure in the cylinder, and a large contact force is generated between the valve and the valve seat, resulting in deformation of the valve and the valve seat, thereby generating sliding wear, so that the total wear amount is more in line with the actual result, providing a basis for the improvement and development of diesel engines. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in 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 creative work.

[0036] Figure 1 A flow chart of a method for calculating the amount of wear between an engine valve and a valve seat provided in one embodiment of the present application.

[0037] Figure 2 A schematic diagram of the seating of a valve and a valve seat in a method for calculating the amount of wear between an engine valve and a valve seat provided in one embodiment of the present application.

[0038] Figure 3 A schematic diagram of the impact angle between a valve and a valve seat in a method for calculating the wear amount between a valve and a valve seat of an engine provided in one embodiment of the present application.

[0039] Figure 4 A schematic diagram of wear caused by friction between two materials in a method for calculating the amount of wear between an engine valve and a valve seat provided in one embodiment of the present application.

[0040] Figure 5 A basic principle diagram of the Archard model in a method for calculating the wear between an engine valve and a valve seat provided in one embodiment of the present application.

[0041] Figure 6This is a flow chart of step A3 in a method for calculating the amount of wear between an engine valve and a valve seat provided in one embodiment of the present application.

[0042] Figure 7 A schematic diagram of coating the surface of a valve in a method for calculating the amount of wear between an engine valve and a valve seat provided in one embodiment of the present application.

[0043] Figure 8 A schematic diagram of the structure of a computer device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0044] 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 embodiments of 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.

[0045] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0046] In an exemplary embodiment, Figure 1 The flowchart shown in the figure provides a method for calculating the wear amount between the engine valve and the valve seat, comprising the following steps:

[0047] A1. According to the influence of the impact angle when the exhaust valve is seated, an impact wear model is established; the impact wear model includes the normal impact wear caused by the impact normal force and the sliding wear caused by the impact tangential force.

[0048] During the diesel engine valve seating process, wear and tear occurs due to single or multiple impacts of the valve. The impact of the diesel engine valve closing will cause deformation, dents, indentations and cracks on the valve and valve seat surface. The valve repeatedly impacts the valve seat during the operation of the diesel engine, which will gradually increase the degree of wear and fatigue cracks on the valve and valve seat surface. At the same time, Figure 2 As shown in the figure, since the contact between the air valve and the valve seat is a conical surface contact, a force will be generated between the air valve and the valve seat in the direction of the conical surface, which will cause the material at the outlet of the impact pit to be extruded. Due to the high working environment temperature of the exhaust valve, the hardness and toughness of the material decrease. The material with lower hardness is more susceptible to impact and wear, while the material with higher toughness may produce plastic deformation under impact and is not easy to crack.

[0049] Most of the existing impact wear models are inspired by the erosion wear model, which believes that the wear amount is related to the impact velocity or impact energy. For example, Wellinger and Breckel studied the wear amount of different metal materials under the impact of spherical steel balls and proposed a semi-empirical relationship as shown in formula (1):

[0050]

[0051] Where W is the wear amount, mm 3 ; K is the impact wear coefficient; N is the number of impact cycles; V is the impact velocity; n wellinger It is the impact wear velocity index in the method proposed by Wellinger.

[0052] Fricke and Allen used a hammer impact wear device to study the impact wear of different types of steel and believed that the wear amount is related to the impact energy, as shown in formula (2):

[0053]

[0054] Among them, n Fricke is the impact wear velocity index in the method proposed by Fricke, e is the impact energy, and the calculation method is shown in formula (3):

[0055]

[0056] Among them, M is the effective mass and V is the impact velocity.

[0057] However, the erosion wear theory is applicable to the random collision of small solid particles with objects, and the scope of action is large. But for the exhaust valve of a diesel engine, when the valve is seated, the valve cone surface collides with the inclined surface on the valve seat, resulting in a certain angle between the impact direction and the target surface, such as Figure 3 As shown, compared with the normal impact angle, there will be a tangential force parallel to the target surface. Therefore, when establishing the impact wear model of the valve and the valve seat, the application takes into account the influence of the impact angle, and divides the impact wear of the valve into two parts. The valve impact force is divided into two parts: normal force and tangential force. That is, the normal component and the component along the tangential direction of the inclined plane are calculated separately. The calculation model is shown in formula (4):

[0058]

[0059] Among them, W 1 is the normal impact wear, K is the normal impact wear coefficient, N is the number of impacts, F n is the normal impact force, n ZLS is the normal impact wear index; W 2is the impact-slip wear amount, k is the impact-slip wear coefficient, x is the impact-slip distance, F t is the tangential impact force, H is the hardness of the softer material, m ZLS is the tangential impact-slip index.

[0060] Mohanad Zalzalah and Roger Lewis conducted a large number of impact tests on austenitic steel and medium carbon steel at different angles to verify the accuracy of the above model. The impact wear coefficient and related indices in the impact wear model established in this application use the data therein for the calculation of valve impact wear. Specifically, the normal impact wear coefficient K = 1.85×10 -9 , the impact-slip wear coefficient k = 1.45×10 -7 , the normal impact wear index n ZLS = 0.816, the tangential impact-slip index m ZLS = 1.850.

[0061] A2. Based on the Archard wear theory, a sliding wear model is established; in the sliding wear model, the sliding wear amount is directly proportional to the sliding distance and the normal load respectively; the sliding wear amount is inversely proportional to the hardness of the softer material.

[0062] The sliding wear on the contact surface between the valve and the valve seat is a common form of friction wear, that is, under a certain load, the surface contact of two objects causes the gradual loss of the contact surface material due to relative movement, as Figure 4 shown. The Archard wear theory proposed by British engineers Duncan Dowson and John Archard is the most classic theory in the study of sliding wear and is widely used. In this embodiment, the sliding wear amount between the valve and the valve seat is calculated according to this wear model.

[0063] The basic principle of the Archard model is as Figure 5 shown. There is roughness on the surface of real materials. When the two surfaces are in contact under a certain load, the asperities on the material surface come into contact with each other and bear the load. There is a difference in the hardness of the two materials that generate friction. The asperities on the surface of the softer material will form adhesion points with the asperities on the surface of the harder material. Assuming that the contact area of each adhesion node is πa 2 , the normal load F of friction is borne by n identical asperities with a radius of a.

[0064] When plastic deformation occurs in the material, the relationship between the normal load F and the yield limit σ y , of the softer material is:

[0065] F = σ y πa 2 n(5)

[0066] When relative sliding occurs between two materials generating friction, assuming that the wear debris generated by each micro-convex body during sliding is hemispherical, its volume is The total wear amount per unit sliding distance can be calculated by formula (6):

[0067]

[0068] From equation (5) and equation (6), we can get the following equation (7):

[0069]

[0070] Formula (7) assumes that each micro-convex body will produce an abrasive particle due to sliding shear when in contact, so the probability of producing abrasive particles in the micro-convex body needs to be considered, and the probability number is set to p. At the same time, the sliding distance l, in mm, also needs to be considered. The final expression of the sliding wear amount of the contact surface is shown in formula (8):

[0071]

[0072] For general elastic materials, the material yield limit σ y =H / 3, H is the Brinell hardness, wear amount (mm 3 ) The calculation formula can be changed to formula (9):

[0073]

[0074] According to the Archard wear calculation formula, the sliding wear of the material is proportional to the sliding distance l and the normal load F; the sliding wear is inversely proportional to the hardness H of the softer material.

[0075] In addition, the effect of temperature on the hardness of metal materials must also be considered. The relationship between the hardness of metal materials and temperature:

[0076] H(T)=H 0 ·e -β·T (10)

[0077] Where: H(T) is the hardness of the softer material at the current temperature, T is the current temperature, H 0 is the hardness of the softer material at room temperature, e is the impact energy, and β is a constant related to the properties of the softer material. As the temperature rises, the surface hardness of the metal material decreases, thereby increasing wear.

[0078] A3. According to the impact force, impact times and hardness of the softer material when the exhaust valve is seated, the impact wear model is called to calculate the normal impact wear and impact sliding wear. Figure 6 In the flowchart shown, step A3 specifically includes the following steps:

[0079] A31. According to the impact angle when the exhaust valve is seated, the impact force when the exhaust valve is seated is divided into normal impact force and tangential impact force.

[0080] A32. Based on the normal impact force and the number of impacts, the impact wear model is called to calculate the normal impact wear amount.

[0081] A33. Based on the tangential impact force, number of impacts and hardness of the softer material, the impact wear model is called to calculate the impact sliding wear amount.

[0082] In this embodiment, the wear amount between the air valve and the valve seat after N impacts is considered, and the number of impacts N here adopts the life of the air valve generally used in relevant literature as 18720000.

[0083] According to the impact force of the valve seat when the gas valve falls, the normal impact force and the tangential impact force are calculated, as shown in Table 1:

[0084] Table 1 Valve Seat Impact Force

[0085] Impact force (N) Valve cone angle (°) Normal impact force (N) Tangential impact force (N) Mechanical impact 6514 45 4606 4606 Thermal-mechanical coupling 8238 45 5825 5825

[0086] According to the comparison of the impact wear results calculated from the parameter list shown in Table 2, it can be seen that the impact wear caused by the collision between the valve and the valve seat under the action of pure mechanical load is 16.46mm. 3 , while the impact wear loss under the action of thermal-mechanical coupling is 24.33 mm 3 The temperature increases and the valve impact wear increases by 7.87mm 3 , it can be concluded that the tangential component of valve impact wear is greatly affected by the temperature field.

[0087] Table 2 Valve Seat Impact Wear Calculation List

[0088]

[0089] A4. According to the normal load, sliding distance and hardness of the softer material when the exhaust valve is closed, the sliding wear model is called to calculate the sliding wear amount. The calculation results of the sliding wear amount are shown in Table 3:

[0090] Table 3 Calculation results of sliding wear

[0091] Mechanical load Thermal-mechanical coupling <![CDATA[Single-cycle wear amount (mm 3 )]]> <![CDATA[4.05×10 -6 > <![CDATA[1.76×10 -5 > Number of impacts 18720000 18720000 <![CDATA[Total sliding wear amount (mm 3 )]]> 33.03 143.61

[0092] According to the calculation results in Table 3, the sliding loss between the valve and the valve seat under the mechanical load is 33.03 mm. 3 The sliding loss between the valve and the valve seat under the thermal-mechanical coupling is 143.61 mm 3 , the sliding wear of the air valve increases significantly after adding the temperature field.

[0093] A5. Based on the normal impact wear amount, impact slip wear amount, and sliding wear amount, the total wear amount between the exhaust valve and the valve seat is calculated. The sum of the impact wear amount and the sliding wear amount of the valve is the total wear amount of the valve, as shown in Table 4:

[0094] Table 4 Total wear amount between the exhaust valve and the valve seat

[0095] Mechanical load Thermal-mechanical coupling Total loss volume (mm3) 49.49 167.94

[0096] According to the calculation results in Table 4, compared with the mechanical load, the wear amount of the valve increases by 239% (118.45 mm 3 ) under the thermo-mechanical coupling considering the temperature field, indicating that the temperature has a great influence on the valve wear.

[0097] In an exemplary embodiment, a computer device is provided. The computer device can be a server or a terminal, and its internal structure diagram can be as shown in Figure 8 . The computer device includes a processor, a memory, an input / output interface (Input / Output, abbreviated as I / O), and a communication interface. Among them, the processor, the memory, and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and external devices. The communication interface of the computer device is used to communicate with external terminals through a network connection. When the computer program is executed by the processor, it realizes the steps of the method for calculating the wear amount between the engine valve and the valve seat mentioned in the above embodiments.

[0098] Those skilled in the art can understand that Figure 8 the structure shown in is only a block diagram of some structures related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine some components, or have different component arrangements.

[0099] In an exemplary embodiment, a computer-readable storage medium is provided, storing a computer program, which realizes the steps in the above method embodiments when executed by a processor.

[0100] In an exemplary embodiment, a computer program product is provided, including a computer program which, when executed by a processor, implements the steps in the above method embodiments.

[0101] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use, and processing of relevant data need to comply with relevant regulations.

[0102] Those of ordinary skill in the art can understand that all or part of the processes of implementing the above method embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the above method embodiments. Among them, any reference to a memory, database, or other medium used in the embodiments provided in this application can include at least one of non-volatile and volatile memories. Non-volatile memories can include read-only memory (ROM), magnetic tapes, floppy disks, flash memories, optical memories, high-density embedded non-volatile memories, resistive random-access memories (ReRAMs), magnetoresistive random-access memories (MRAMs), ferroelectric random-access memories (FRAMs), phase change memories (PCMs), graphene memories, etc. Volatile memories can include random access memories (RAMs) or external caches, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc.

[0103] The databases involved in the embodiments provided in this application can include at least one of relational databases and non-relational databases. Non-relational databases can include distributed databases based on blockchain, etc., and are not limited thereto. The processors involved in the embodiments provided in this application can be general-purpose processors, central processors, graphics processors, digital signal processors, programmable logics, data processing logics based on quantum computing, etc., and are not limited thereto.

[0104] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0105] Specific examples are used in this article to elaborate on the principles and implementation manners of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application; at the same time, for those of ordinary skill in the art, according to the idea of the present application, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. A method for calculating the wear between an engine valve and a valve seat, characterized in that: include: According to the influence of the impact angle when the exhaust valve is seated, an impact wear model is established; the impact wear model includes the normal impact wear caused by the impact normal force and the sliding wear caused by the impact tangential force; Based on Archard wear theory, a sliding wear model is established; in the sliding wear model, the sliding wear amount is proportional to the sliding distance and the normal load respectively; the sliding wear amount is inversely proportional to the hardness of the softer material; According to the impact force, impact times and hardness of the softer material when the exhaust valve is seated, the impact wear model is called to calculate the normal impact wear amount and the impact sliding wear amount; The sliding wear model is called according to the normal load, sliding distance and hardness of the softer material when the exhaust valve is closed to calculate the sliding wear amount; Calculating the total wear amount between the exhaust valve and the valve seat according to the normal impact wear amount, the impact sliding wear amount and the sliding wear amount; According to the impact force, impact times and hardness of the softer material when the exhaust valve is seated, the impact wear model is called to calculate the normal impact wear amount and the impact sliding wear amount, specifically including: According to the impact angle when the exhaust valve is seated, the impact force when the exhaust valve is seated is divided into normal impact force and tangential impact force; Based on the normal impact force and the number of impacts, the impact wear model is called to calculate the normal impact wear amount; Based on the tangential impact force, the number of impacts and the hardness of the softer material, the impact wear model is called to calculate the impact sliding wear amount; The normal impact wear amount is calculated according to the following formula: Where W1 is the normal impact wear, K is the normal impact wear coefficient, N is the number of impacts, F n is the normal impact force, n ZLS is the normal impact wear index; The impact sliding wear amount is calculated according to the following formula: Where W2 is the impact sliding wear, k is the impact sliding wear coefficient, N is the number of impacts, x is the impact sliding distance, F t is the tangential impact force, H is the hardness of the softer material, m ZLS is the tangential impact slip index.

2. The method for calculating the wear amount between the engine valve and the valve seat according to claim 1, characterized in that: The sliding wear amount is calculated according to the following formula: Among them, W3 is the sliding wear amount, p is the probability of generating abrasive particles in the micro-asperity, F is the normal load, l is the sliding distance, and H is the hardness of the softer material.

3. The method for calculating the wear amount between the engine valve and the valve seat according to any one of claim 1, characterized in that: Also includes: Based on the effect of temperature on the hardness of the metal material and the current temperature, the hardness of the softer material at the current temperature is determined.

4. The method for calculating the wear amount between the engine valve and the valve seat according to claim 3, characterized in that: Determine the hardness of the softer material at the current temperature according to the following formula: H(T)=H0·e -β·T ; Where H(T) is the hardness of the softer material at the current temperature, T is the current temperature, H0 is the hardness of the softer material at room temperature, e is the impact energy, and β is a constant related to the properties of the softer material.

5. A computer device comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method for calculating the amount of wear between an engine valve and a valve seat as described in any one of claims 1-4.

6. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method for calculating the amount of wear between an engine valve and a valve seat according to any one of claims 1 to 4 is implemented.

7. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the method for calculating the amount of wear between an engine valve and a valve seat according to any one of claims 1 to 4 is implemented.

Images