Engine power calibration method and device, electronic equipment and storage medium

Abstract

The present application relates to the technical field of vehicle engine, and discloses an engine power calibration method and device, electronic equipment and storage medium. The method comprises: performing orthogonal test on the engine under a preset working condition to determine the working performance parameters of the engine; determining the engine optimization configuration and the engine safety boundary based on the working performance parameters; determining the performance parameters of the engine under the engine pre-stage external characteristic state based on the engine optimization configuration and the engine safety boundary; performing universal characteristic test on the engine according to the performance parameters to determine the engine stable parameters; and performing constant speed loading test and free acceleration test on the engine based on the engine stable parameters, and recording each test result. The present application can solve the problem of insufficient robustness of engine bench calibration test under plateau environment, is conducive to optimizing the test process of engine bench calibration test, and improves the test robustness.

Description

Technical Field

[0001] This invention relates to the field of vehicle engine technology, and in particular to an engine power performance calibration method, apparatus, electronic device, and storage medium. Background Technology

[0002] Diesel engines in off-road applications are highly sensitive to power performance; sufficient power output ensures efficient operation of the entire machine. Currently, there is a strong demand for off-road construction machinery in high-altitude areas. The high-altitude environment, characterized by high elevation and low air pressure, results in a decrease in engine intake air volume and oxygen content compared to conditions at lower altitudes. Engines calibrated under standard conditions will experience significant performance changes when operating at high altitudes. Generally, engine power performance at high altitudes is reduced compared to that at lower altitudes.

[0003] Existing methods for engine performance calibration and high-altitude power optimization calibration are relatively abundant: for example, a working condition profile is constructed based on engine operating parameters, and performance calibration is achieved based on the working condition profile and calibration dataset to complete performance index optimization; or an altitude simulation system is used to optimize and adjust fuel injection quantity and intake air quantity to achieve improved power and fuel economy at high altitudes. However, the above-mentioned existing solutions cannot simultaneously ensure hardware reliability and emission compliance, and have the problem of insufficient robustness of optimization results. Summary of the Invention

[0004] The purpose of this invention is to provide an engine power performance calibration method, device, electronic equipment, and storage medium to at least solve the problem of insufficient robustness of engine bench calibration tests in high-altitude environments, and to facilitate the optimization of the test process for engine bench calibration tests and improve test robustness.

[0005] To address the aforementioned technical problems, in a first aspect, the present invention provides an engine power performance calibration method, comprising at least: S1. Conduct an orthogonal test on the engine under preset operating conditions to determine the engine's operating performance parameters; S2. Determine the optimal engine configuration and engine safety boundaries based on the aforementioned performance parameters; S3. Determine the engine performance parameters under the early external characteristic state of the engine based on the engine optimized configuration and the engine safety boundary; S4. Perform a universal characteristic test on the engine based on the performance parameters to determine the engine stability parameters; S5. Based on the engine stability parameters, conduct constant speed loading test and free acceleration test on the engine, and calibrate and record the results of each test.

[0006] Optionally, step S1 specifically includes: S11. Set the engine's performance status indicators, emission status indicators, and economic indicators; S12. Conduct an orthogonal test on the engine to obtain all operating parameters of the engine under each preset operating condition and their corresponding performance status indicators, emission status indicators and economic indicators. S13. Determine the operating performance parameters from all the operating parameters based on the performance status indicators, the emission status indicators, and the economic indicators.

[0007] 3. The engine power performance calibration method according to claim 1, characterized in that step S11 specifically includes: S111, Set torque, power, turbocharger speed, and cylinder pressure as performance status indicators; S112, NO X Emissions, nitrogen oxides, and smoke opacity are set as emission status indicators; S113, set intake air flow, specific fuel consumption, and air-fuel ratio as economic indicators.

[0008] Optionally, step S2 specifically includes: S21. Determine the influence degree of each sub-parameter in the operating performance parameters, and determine the optimal configuration of the engine based on the influence degree; S22. Determine the safety boundary based on the maximum and minimum values ​​of each sub-parameter in the performance parameters.

[0009] Optionally, step S3 specifically includes: S31. Confirm the current power performance, emission capacity and hardware boundary margin of the engine through the early external characteristic state of the engine; S32. Based on the safety boundary and the hardware boundary margin, dynamically adjust the value corresponding to the engine optimization configuration to determine the engine's power and emission capacity under each value; S33. Determine the engine's performance parameters under the initial external characteristic state based on all the aforementioned power and emission capabilities.

[0010] Optionally, step S5 specifically includes: S51. Operate the engine based on the engine stability parameters; S52. Conduct a constant speed loading test on the engine and continuously adjust the EGR opening of the engine, calibrating and recording the power performance and emission performance of the engine under different EGR openings. S53. Conduct the free acceleration test on the engine and continuously adjust the EGR opening, calibrating and recording the engine's responsiveness, emissions performance, and hardware durability under different EGR openings.

[0011] Optionally, the preset operating conditions include at least horizontal altitude operating conditions, medium altitude operating conditions, and high altitude operating conditions.

[0012] In a second aspect, the present invention also provides an engine power performance calibration apparatus, the apparatus being used to perform the engine power performance calibration method described in any one of the first aspects; The device includes at least: The first determining module is used to conduct orthogonal tests on the engine under preset operating conditions in order to determine the engine's operating performance parameters; The second determining module is used to determine the engine optimal configuration and engine safety boundary based on the operating performance parameters; The third determining module is used to determine the engine's performance parameters under the early external characteristic state of the engine based on the engine's optimized configuration and the engine's safety boundary. The fourth determining module is used to conduct universal characteristic tests on the engine based on the performance parameters in order to determine the engine stability parameters; The calibration and recording module is used to conduct constant speed loading tests and free acceleration tests on the engine based on the engine stability parameters, and to calibrate and record the results of each test.

[0013] Thirdly, the present invention also provides an electronic device, including a memory and a processor, the memory storing a computer program executable on the processor, the processor executing the program to implement the steps in the engine performance calibration method of any one of the first aspects.

[0014] Fourthly, the present invention also provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps in the engine power performance calibration method of any one of the first aspects.

[0015] The technical solution provided by this invention firstly involves conducting orthogonal tests on the engine under preset operating conditions to determine the engine's operating performance parameters; secondly, determining the engine's optimal configuration and safety boundaries based on the operating performance parameters; thirdly, determining the engine's performance parameters under the engine's initial external characteristic state based on the engine's optimal configuration and safety boundaries; then, conducting universal characteristic tests on the engine based on the performance parameters to determine the engine's stability parameters; and finally, conducting constant speed loading tests and free acceleration tests on the engine based on the engine's stability parameters, and calibrating and recording the results of each test.

[0016] Therefore, this invention, on the one hand, determines the optimal configuration and safety boundaries of the engine based on its operating performance parameters, which can fully utilize the hardware safety margins (boost pressure, turbocharger speed) of the engine under extreme high-altitude conditions, avoiding the performance waste caused by the conservative strategies of traditional calibration schemes. On the other hand, by recording the calibration results of various constant-speed loading tests and free acceleration tests, this invention can obtain the engine's full-condition performance parameters, providing data support for optimizing the dynamic and steady-state performance of the engine under various conditions. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of an engine power performance calibration method provided by the present invention; Figure 2 This is a schematic diagram of another engine power performance calibration method provided by the present invention; Figure 3 This is a schematic diagram of an engine power performance calibration device provided by the present invention; Figure 4 This is a schematic diagram of an electronic device provided by the present invention; Figure 5 This is a schematic diagram illustrating the performance status of a typical working condition in an orthogonal test debugging provided by the present invention; Figure 6 This is a schematic diagram of the hardware boundary of the typical working condition effect of orthogonal test debugging provided by the present invention; Figure 7 This is a schematic diagram of the typical working condition effect of orthogonal test debugging provided by the present invention - comprehensive fuel consumption; Figure 8 This is a schematic diagram illustrating the emission capacity under typical operating conditions of orthogonal test debugging provided by the present invention; Figure 9 This is a schematic diagram of the hardware boundary of the typical working condition effect of orthogonal test debugging provided by the present invention; Figure 10 This is a schematic diagram of the typical working condition effect of orthogonal test debugging provided by the present invention - comprehensive fuel consumption; Figure 11 This is a schematic diagram illustrating the emission capacity under typical operating conditions of orthogonal test debugging provided by the present invention; Figure 12 This is a schematic diagram of the optimization of power loss at an altitude of 2000m under the early external characteristic state of an engine, provided by the present invention. Figure 13 This is a schematic diagram of the optimization of power loss at an altitude of 3000m under the early external characteristic state of an engine, provided by the present invention. Figure 14 This is a schematic diagram of the universal characteristics-power at an altitude of 2000m provided by the present invention; Figure 15This is a schematic diagram of a universal characteristic cylinder pressure at an altitude of 2000m provided by the present invention; Figure 16 This is a schematic diagram of the universal characteristics-power at an altitude of 3000m provided by the present invention; Figure 17 This is a schematic diagram of a universal characteristic cylinder pressure at an altitude of 3000m provided by the present invention. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0019] Figure 1 This is a schematic diagram of an engine performance calibration method provided by the present invention. The present invention is applicable to performance calibration scenarios for at least various types of engines, especially suitable for engine performance calibration scenarios in high-altitude environments. This engine performance calibration method can be, but is not limited to, executed by the engine performance calibration device described in the present invention, which can be implemented using software and / or hardware. Figure 1 As shown, the engine performance calibration method includes at least the following steps: S1. Conduct orthogonal tests on the engine under preset operating conditions to determine the engine's operating performance parameters.

[0020] The preset operating conditions include at least three altitude conditions: horizontal, medium, and high altitude. The altitude for the horizontal altitude condition is 0 meters. The altitude for the medium altitude condition is 2000 meters. The altitude for the high altitude condition is 3000 meters. The operating performance parameters can be parameters such as engine power, speed, and intake airflow under the preset operating conditions.

[0021] S2. Determine the optimal configuration of the engine and the engine safety boundary based on the operating performance parameters.

[0022] Engine optimization configuration can be considered as the direction of engine optimization. Engine safety margin can be considered as the parameter range for normal engine operation.

[0023] S3. Determine the engine performance parameters under the early external characteristic state of the engine based on the engine optimization configuration and engine safety boundary.

[0024] Among them, the performance parameters can be the parameters that enable the engine to achieve its highest performance under the initial external characteristic state of the engine.

[0025] S4. Conduct universal characteristic tests on the engine based on the performance parameters to determine the engine's stability parameters.

[0026] Among these, the universal characteristic test can be a universal characteristic test at an altitude of 2000m. The engine stability parameters can be the operating parameters of the engine when it is operating stably in a high-altitude region.

[0027] S5. Conduct constant speed loading tests and free acceleration tests on the engine based on engine stability parameters, and calibrate and record the results of each test.

[0028] The technical solution provided by this invention firstly involves conducting orthogonal tests on the engine under preset operating conditions to determine the engine's operating performance parameters; secondly, determining the engine's optimal configuration and safety boundaries based on the operating performance parameters; thirdly, determining the engine's performance parameters under the engine's initial external characteristic state based on the engine's optimal configuration and safety boundaries; then, conducting universal characteristic tests on the engine based on the performance parameters to determine the engine's stability parameters; and finally, conducting constant speed loading tests and free acceleration tests on the engine based on the engine's stability parameters, and calibrating and recording the results of each test.

[0029] Therefore, this invention, on the one hand, determines the optimal configuration and safety boundaries of the engine based on its operating performance parameters, which can fully utilize the hardware safety margins (boost pressure, turbocharger speed) of the engine under extreme high-altitude conditions, avoiding the performance waste caused by the conservative strategies of traditional calibration schemes. On the other hand, by recording the calibration results of various constant-speed loading tests and free acceleration tests, this invention can obtain the engine's full-condition performance parameters, providing data support for optimizing the dynamic and steady-state performance of the engine under various conditions.

[0030] Based on the above embodiments or implementation methods Figure 2 This is a schematic diagram of another engine power performance calibration method provided by the present invention, which is based on the above embodiments and includes additions and refinements. For example... Figure 2 As shown, the engine performance calibration method includes at least the following steps: S11. Set the engine's performance status indicators, emission status indicators, and economic indicators.

[0031] In one specific implementation, step S11 may optionally include: S111, set torque, power, turbocharger speed, and cylinder pressure as performance status indicators.

[0032] Among them, the performance status index is used to evaluate engine performance.

[0033] S112, NO X Emissions, nitrogen oxides, and smoke opacity are set as emission status indicators.

[0034] Among them, the emission status index is used to assess engine exhaust emissions. Smoke opacity can be 415 smoke opacities.

[0035] S113, set intake air flow, specific fuel consumption, and air-fuel ratio as economic indicators.

[0036] Among them, the economic indicators are used to evaluate the economic benefits of the engine.

[0037] S12. Conduct orthogonal tests on the engine to obtain all operating parameters of the engine under each preset operating condition and their corresponding performance status indicators, emission status indicators and economic indicators.

[0038] The operating parameters can be the engine's working parameters under preset operating conditions. Further adjustments to various engine parameters can be made to simulate more sub-operating conditions. For example, simulating low / medium / high-speed engine operation at an altitude of 2000m. Figure 5 This is a schematic diagram illustrating the performance status of a typical working condition during orthogonal test debugging provided by the present invention. Figure 6 This is a schematic diagram of the hardware boundary of a typical working condition for orthogonal test debugging provided by the present invention. Figure 7 This is a schematic diagram illustrating the typical operating condition effect of orthogonal test debugging—comprehensive fuel consumption—provided by the present invention. Figure 8 This is a schematic diagram illustrating the emission capacity under typical operating conditions of orthogonal test debugging provided by the present invention. Figure 5-8 Optimize the advance angle. Figure 9 This is a schematic diagram of the hardware boundary of a typical working condition for orthogonal test debugging provided by the present invention. Figure 10 This is a schematic diagram illustrating the typical operating condition effect of orthogonal test debugging—comprehensive fuel consumption—provided by the present invention. Figure 11 This is a schematic diagram illustrating the emission capacity under typical operating conditions of orthogonal test debugging provided by the present invention. Figure 9-11 The power is constant.

[0039] S13. Determine the working performance parameters from all operating parameters based on performance status indicators, emission status indicators, and economic indicators.

[0040] In this invention, the operating parameters with the highest performance status index, emission status index, and economic index are preferred as the working performance parameters.

[0041] S21. Determine the influence degree of each sub-parameter in the working performance parameters, and determine the optimal configuration of the engine based on the influence degree.

[0042] The degree of influence can be understood as the extent of impact on performance status indicators, emission status indicators, and economic indicators. The higher the degree of influence, the higher the probability of determining it as an optimal engine configuration. Table 1 is the EGR opening correction table based on atmospheric pressure under the preset operating conditions of this invention (partial correction area); Table 2 is the main injection angle correction table based on atmospheric pressure under the preset operating conditions of this invention (partial correction area); Table 3 is the rail pressure correction table based on atmospheric pressure under the preset operating conditions of this invention (partial correction area), as shown in Tables 1-3.

[0043] Table 1

[0044] Table 2

[0045] Table 3

[0046] Analysis of Tables 1-3 shows that, assuming the basic performance parameters are fixed, the main aspects of engine optimization are as follows: 1. Optimize the impact on intake volume during dynamic steady-state processes; 2. Optimize the impact of smoke opacity restrictions on performance during dynamic processes; 3. Make full use of the turbocharger speed safety margin under high-altitude conditions.

[0047] S22. Determine the safety boundary based on the maximum and minimum values ​​of each sub-parameter in the performance parameters.

[0048] S31. Confirm the engine's current power performance, emission capacity, and hardware boundary margins by examining the engine's early external characteristic status.

[0049] Among these, performance characteristics can include torque, power, and power loss. Emissions capacity can include 415 smoke opacities. It is understood that hardware boundaries refer to the operational limits allowed by the design of engine components: maximum turbocharger speed, maximum cylinder pressure, maximum exhaust temperature, turbine inlet temperature, etc. Hardware boundary margin = hardware limit value. Actual operating values ​​under current conditions. After determining the power performance, emission capacity, and hardware boundary margins, subsequent tests can reduce power loss within the hardware safety range while ensuring a certain emission capacity.

[0050] Therefore, this invention covers typical application scenarios of engine matching in engineering machinery, and conducts condition assessment accordingly. Based on the performance assessment test results, several performance parameters with good overall performance are selected as the basic performance parameters for high-altitude data calibration. This ensures that the engine has sufficient power output while retaining a certain boundary margin, facilitating further steady-state and dynamic optimization. Furthermore, the performance assessment test results provide clear optimization directions and boundary margins for hardware and emissions in subsequent optimization work.

[0051] S32. Based on the safety boundary and hardware boundary margin, dynamically adjust the corresponding values ​​of the engine optimization configuration to determine the engine's power and emission capabilities under each value.

[0052] The values ​​corresponding to the dynamic adjustment of the engine optimization configuration can be based on the turbocharger speed and cylinder pressure margin, adjusting and optimizing the engine steady-state EGR opening and turbocharger protection fuel quantity. Table 4 is a table of EGR opening correction coefficients based on atmospheric pressure provided by the present invention; Table 5 is a table of test results for EGR opening correction coefficients based on atmospheric pressure provided by the present invention; Table 6 is a table of test results for fuel quantity limits based on atmospheric pressure and operating conditions provided by the present invention; Table 7 is a table of smoke limit correction coefficients based on atmospheric pressure provided by the present invention; Table 8 is a table of test results for smoke limit correction parameters based on atmospheric pressure provided by the present invention. The test results of step S32 can be found in Tables 4-8.

[0053] Table 4

[0054] Table 5

[0055] Table 6

[0056] Table 7

[0057] Table 8

[0058] S33. Determine the engine's performance parameters under the initial external characteristic state based on all power and emission capabilities.

[0059] Once the performance parameters are determined, it can be understood that the external characteristic test and packaging are complete. Figure 12 This is a schematic diagram illustrating the optimization of power loss at an altitude of 2000m under the initial external characteristic state of an engine, as provided by the present invention. Figure 13This is a schematic diagram illustrating the optimization of power loss at 3000m altitude under the initial external characteristic state of an engine, as provided by this invention. (See attached diagram.) Figure 12-13 .

[0060] S4. Conduct universal characteristic tests on the engine based on the performance parameters to determine the engine's stability parameters.

[0061] in, Figure 14 This is a schematic diagram of the universal characteristics-power at an altitude of 2000m provided by the present invention. Figure 15 This is a schematic diagram of the universal characteristic cylinder pressure at an altitude of 2000m provided by the present invention. Figure 16 This is a schematic diagram of the universal characteristics-power at an altitude of 3000m provided by the present invention. Figure 17 This is a schematic diagram of the universal characteristic cylinder pressure at an altitude of 3000m provided by the present invention. See [link / reference]. Figure 14-17 .

[0062] S51, operate the engine based on engine stability parameters.

[0063] S52. Conduct constant speed loading tests on the engine and continuously adjust the engine's EGR opening, calibrating and recording the engine's power performance and emissions performance under different EGR openings.

[0064] One method is constant-speed loading testing, which involves selecting common engine operating points for constant-speed loading tests. By optimizing the EGR opening during the loading process, the power and emissions performance at various speeds can be improved. The EGR opening is adjusted specifically based on the characteristics of different stages during loading. For example, the opening is reduced in the early stages of loading to meet the high demand for rapid intake air response during sudden load increases, while a certain EGR opening is maintained at the end of the loading process to meet the turbocharger speed threshold requirements.

[0065] S53. Conduct free acceleration tests on the engine and continuously adjust the EGR opening, calibrating and recording the engine's responsiveness, emissions performance, and hardware durability under different EGR openings.

[0066] The free acceleration test can be conducted based on the engine's low and high idle speeds. By optimizing the EGR opening during acceleration, the transient responsiveness, emissions performance, and hardware durability can be improved. Based on the state of the airflow response during acceleration, the EGR opening is adjusted accordingly to shorten the acceleration time as much as possible while meeting the turbocharger speed threshold requirements.

[0067] The technical solution provided by this invention firstly sets the engine's performance status indicators, emission status indicators, and economic indicators. Further, orthogonal experiments are conducted on the engine to obtain all operating parameters of the engine under each preset operating condition, along with their corresponding performance status indicators, emission status indicators, and economic indicators. Further, working performance parameters are determined from all operating parameters based on the performance status indicators, emission status indicators, and economic indicators. Further, the influence degree of each sub-parameter in the working performance parameters is determined, and the optimal engine configuration is determined based on the influence degree. Further, safety boundaries are determined according to the maximum and minimum values ​​of each sub-parameter in the working performance parameters. Further, the current engine power, emission capacity, and hardware boundary margin are confirmed through the engine's early external characteristic state. Further, based on the safety boundaries and hardware boundary margins, the values ​​corresponding to the optimal engine configuration are dynamically adjusted to determine the engine's power and emission capacity under each value. Further, the engine's performance parameters under the early external characteristic state are determined based on all power and emission capabilities. Further, universal characteristic tests are conducted on the engine according to the performance parameters to determine the engine's stability parameters. Further, the engine is operated based on the engine's stable parameters. Furthermore, constant-speed loading tests were conducted on the engine, and the EGR opening was continuously adjusted. The engine's power performance and emissions performance under different EGR openings were calibrated and recorded. Finally, free acceleration tests were conducted on the engine, and the EGR opening was continuously adjusted. The engine's responsiveness, emissions performance, and hardware durability under different EGR openings were calibrated and recorded.

[0068] Therefore, this invention, on the one hand, determines the optimal engine configuration and engine safety boundaries based on operating performance parameters, fully utilizing the engine's hardware safety margins (boost pressure, turbocharger speed) under extreme high-altitude conditions, avoiding performance waste caused by the conservative strategies of traditional calibration schemes. On the other hand, by recording the calibration results of various constant-speed loading tests and free acceleration tests, this invention can obtain the engine's full-condition performance parameters, providing data support for optimizing the engine's dynamic and steady-state performance under various conditions. Furthermore, this invention... Based on preliminary bench test results, the engine's hardware margins have been fully utilized, with corresponding improvements in turbocharger speed and engine knock pressure. Power loss in high-altitude environments has been significantly reduced, resulting in a marked improvement in overall performance. After calibration and optimization of multiple modules, the engine's operating boundaries need further verification. Through thorough condition assessment, it can be concluded that the current improvements are applicable, the engine's operating boundaries meet the requirements of the previous project development, and the improvements can be solidified into the data files. This solution can be applied to the high-altitude market and is of great significance for improving the overall high-altitude performance of the engine.

[0069] Figure 3This is a schematic diagram of an engine performance calibration device provided by the present invention. The present invention is applicable to performance calibration scenarios for at least various types of engines, especially suitable for engine performance calibration scenarios in high-altitude environments. This engine performance calibration device can be implemented using software and / or hardware. Figure 3 As shown, the engine power calibration device includes at least: The first determining module 110 is used to conduct orthogonal tests on the engine under preset operating conditions in order to determine the engine's operating performance parameters.

[0070] The second determining module 120 is used to determine the engine's optimal configuration and engine safety boundaries based on operating performance parameters.

[0071] The third determining module 130 is used to determine the engine's performance parameters under the early external characteristic state of the engine based on the engine's optimized configuration and engine safety boundary.

[0072] The fourth determining module 140 is used to conduct universal characteristic tests on the engine based on performance parameters in order to determine the engine stability parameters.

[0073] The calibration recording module 150 is used to conduct constant speed loading tests and free acceleration tests on the engine based on engine stability parameters, and to calibrate and record the results of each test.

[0074] Optionally, the first determining module 110 is specifically used for: The engine's performance status indicators, emission status indicators, and economic indicators are set; and orthogonal tests are conducted on the engine to obtain all operating parameters of the engine under each preset operating condition and their corresponding performance status indicators, emission status indicators, and economic indicators; and operating performance parameters are determined from all operating parameters based on the performance status indicators, emission status indicators, and economic indicators.

[0075] Optionally, the first determining module 110 is further specifically used for: Torque, power, turbocharger speed, and cylinder pressure are set as performance indicators; NOx emissions, nitrogen oxide ratio, and smoke opacity are set as emission indicators; and intake air flow, fuel consumption, and air-fuel ratio are set as economic indicators.

[0076] Optionally, the second determining module 120 is specifically used for: Determine the influence degree of each sub-parameter in the operating performance parameters, and determine the optimal engine configuration based on the influence degree; and determine the safety boundary based on the maximum and minimum values ​​of each sub-parameter in the operating performance parameters.

[0077] Optionally, the third determining module 130 is specifically used for: The engine's current power performance, emissions capacity, and hardware boundary margin are determined by assessing its early external characteristic state. Based on the safety boundary and hardware boundary margin, the engine's optimized configuration is dynamically adjusted to determine its power performance and emissions capacity under each value. Finally, the engine's performance parameters under the early external characteristic state are determined based on all power performance and emissions capacity.

[0078] Optionally, the calibration recording module 150 is specifically used for: The engine is operated based on stable engine parameters; and constant speed loading tests are conducted on the engine, and the EGR opening is continuously adjusted to calibrate and record the engine's power performance and emissions performance under different EGR openings; and free acceleration tests are conducted on the engine, and the EGR opening is continuously adjusted to calibrate and record the engine's responsiveness, emissions performance and hardware durability under different EGR openings.

[0079] Optionally, the preset operating conditions include at least horizontal altitude operating conditions, medium altitude operating conditions, and high altitude operating conditions.

[0080] The technical solution provided by this invention firstly involves conducting orthogonal tests on the engine under preset operating conditions using a first determining module to determine the engine's operating performance parameters; secondly, a second determining module determines the engine's optimized configuration and safety boundaries based on the operating performance parameters; thirdly, a third determining module determines the engine's performance parameters under the engine's initial external characteristic state based on the optimized configuration and safety boundaries; then, a fourth determining module conducts universal characteristic tests on the engine based on the performance parameters to determine the engine's stability parameters; finally, a calibration and recording module conducts constant speed loading tests and free acceleration tests on the engine based on the engine's stability parameters, and calibrates and records the results of each test.

[0081] Therefore, this invention, on the one hand, determines the optimal configuration and safety boundaries of the engine based on its operating performance parameters, which can fully utilize the hardware safety margins (boost pressure, turbocharger speed) of the engine under extreme high-altitude conditions, avoiding the performance waste caused by the conservative strategies of traditional calibration schemes. On the other hand, by recording the calibration results of various constant-speed loading tests and free acceleration tests, this invention can obtain the engine's full-condition performance parameters, providing data support for optimizing the dynamic and steady-state performance of the engine under various conditions.

[0082] This invention provides an electronic device, Figure 4 This is a schematic diagram of an electronic device provided by the present invention. See also: Figure 4The electronic device 1000 includes a processor 1001 and a memory 1002. The memory 1002 stores computer-readable instructions. When the computer-readable instructions are executed by the processor 1001, the steps in any of the above-described engine performance calibration methods are performed. Through the above technical solution, the processor 1001 and the memory 1002 are interconnected and communicate with each other via a communication bus and / or other forms of connection mechanisms (not shown). The memory 1002 stores a processor-executable computer program. When the electronic device 1000 is running, the processor 1001 executes the computer program to perform the engine performance calibration method in any optional implementation of the above embodiments, to at least achieve the following functions: conducting orthogonal tests on the engine under preset operating conditions to determine the engine's operating performance parameters; determining the engine's optimal configuration and engine safety boundaries based on the operating performance parameters; determining the engine's performance parameters under the engine's early external characteristic states based on the engine's optimal configuration and engine safety boundaries; conducting universal characteristic tests on the engine according to the performance parameters to determine the engine's stability parameters; and conducting constant-speed loading tests and free acceleration tests on the engine based on the engine stability parameters, and calibrating and recording the results of each test.

[0083] This invention provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the engine performance calibration method provided in all embodiments of this invention: performing orthogonal tests on the engine under preset operating conditions to determine the engine's operating performance parameters; determining the engine's optimal configuration and safety boundaries based on the operating performance parameters; determining the engine's performance parameters under the engine's initial external characteristic state based on the engine's optimal configuration and safety boundaries; performing universal characteristic tests on the engine based on the performance parameters to determine the engine's stability parameters; and conducting constant-speed loading tests and free acceleration tests on the engine based on the engine's stability parameters, and calibrating and recording the results of each test.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An engine power rating method, characterized by, At least including: S1. Conduct an orthogonal test on the engine under preset operating conditions to determine the engine's operating performance parameters; S2. Determine the optimal engine configuration and engine safety boundaries based on the aforementioned performance parameters; S3. Determine the engine performance parameters under the early external characteristic state of the engine based on the engine optimized configuration and the engine safety boundary; S4. Perform a universal characteristic test on the engine based on the performance parameters to determine the engine stability parameters; S5. Based on the engine stability parameters, conduct constant speed loading test and free acceleration test on the engine, and calibrate and record the results of each test.

2. The engine power performance calibration method according to claim 1, characterized in that, Step S1 specifically includes: S11. Set the engine's performance status indicators, emission status indicators, and economic indicators; S12. Conduct an orthogonal test on the engine to obtain all operating parameters of the engine under each preset operating condition and their corresponding performance status indicators, emission status indicators and economic indicators. S13. Determine the operating performance parameters from all the operating parameters based on the performance status indicators, the emission status indicators, and the economic indicators.

3. The engine power performance calibration method according to claim 2, characterized in that, Step S11 specifically includes: S111, Set torque, power, turbocharger speed, and cylinder pressure as performance status indicators; S112, the NO X The emission amount, specific nitrogen oxides, and smoke degree are set as the emission state indexes. S113, set intake air flow, specific fuel consumption, and air-fuel ratio as economic indicators.

4. The engine power performance calibration method according to claim 1, characterized in that, Step S2 specifically includes: S21. Determine the influence degree of each sub-parameter in the operating performance parameters, and determine the optimal configuration of the engine based on the influence degree; S22. Determine the safety boundary based on the maximum and minimum values ​​of each sub-parameter in the performance parameters.

5. The engine power performance calibration method according to claim 1, characterized in that, Step S3 specifically includes: S31. Confirm the current power performance, emission capacity and hardware boundary margin of the engine through the early external characteristic state of the engine; S32. Based on the safety boundary and the hardware boundary margin, dynamically adjust the value corresponding to the engine optimization configuration to determine the engine's power and emission capacity under each value; S33. Determine the engine's performance parameters under the initial external characteristic state based on all the aforementioned power and emission capabilities.

6. The engine power performance calibration method according to claim 1, characterized in that, Step S5 specifically includes: S51. Operate the engine based on the engine stability parameters; S52. Conduct a constant speed loading test on the engine and continuously adjust the EGR opening of the engine, calibrating and recording the power performance and emission performance of the engine under different EGR openings. S53. Conduct the free acceleration test on the engine and continuously adjust the EGR opening, calibrating and recording the engine's responsiveness, emissions performance, and hardware durability under different EGR openings.

7. The engine power performance calibration method according to claim 1, characterized in that, The preset operating conditions include at least horizontal altitude operating conditions, medium altitude operating conditions, and high altitude operating conditions.

8. An engine power performance calibration device, characterized in that, The apparatus is used to perform the engine power performance calibration method as described in any one of claims 1-7; The device includes at least: The first determining module is used to conduct orthogonal tests on the engine under preset operating conditions in order to determine the engine's operating performance parameters; The second determining module is used to determine the engine optimal configuration and engine safety boundary based on the operating performance parameters; The third determining module is used to determine the engine's performance parameters under the engine's early external characteristic state based on the engine's optimized configuration and the engine's safety boundary. The fourth determining module is used to conduct universal characteristic tests on the engine based on the performance parameters in order to determine the engine stability parameters; The calibration and recording module is used to conduct constant speed loading tests and free acceleration tests on the engine based on the engine stability parameters, and to calibrate and record the results of each test.

9. An electronic device comprising a memory and a processor, the memory storing a computer program executable on the processor, characterized in that, When the processor executes the program, it implements the steps in the engine power performance calibration method according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps in the engine power performance calibration method according to any one of claims 1 to 7.

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